diff --git a/content/static/godocs.js b/content/static/godocs.js
index 7aff251..149f768 100644
--- a/content/static/godocs.js
+++ b/content/static/godocs.js
@@ -11,336 +11,371 @@
  */
 
 (function() {
-'use strict';
+  'use strict';
 
-var headerEl = document.querySelector('.js-header');
-var menuButtonEl = document.querySelector('.js-headerMenuButton');
-menuButtonEl.addEventListener('click', function(e) {
-  e.preventDefault();
-  headerEl.classList.toggle('is-active');
-  menuButtonEl.setAttribute('aria-expanded', headerEl.classList.contains('is-active'));
-});
-
-/* Generates a table of contents: looks for h2 and h3 elements and generates
- * links. "Decorates" the element with id=="nav" with this table of contents.
- */
-function generateTOC() {
-  if ($('#manual-nav').length > 0) {
-    return;
-  }
-
-  // For search, we send the toc precomputed from server-side.
-  // TODO: Ideally, this should always be precomputed for all pages, but then
-  // we need to do HTML parsing on the server-side.
-  if (location.pathname === '/search') {
-    return;
-  }
-
-  var nav = $('#nav');
-  if (nav.length === 0) {
-    return;
-  }
-
-  var toc_items = [];
-  $(nav).nextAll('h2, h3').each(function() {
-    var node = this;
-    if (node.id == '')
-      node.id = 'tmp_' + toc_items.length;
-    var link = $('<a/>').attr('href', '#' + node.id).text($(node).text());
-    var item;
-    if ($(node).is('h2')) {
-      item = $('<dt/>');
-    } else { // h3
-      item = $('<dd class="indent"/>');
-    }
-    item.append(link);
-    toc_items.push(item);
+  var headerEl = document.querySelector('.js-header');
+  var menuButtonEl = document.querySelector('.js-headerMenuButton');
+  menuButtonEl.addEventListener('click', function(e) {
+    e.preventDefault();
+    headerEl.classList.toggle('is-active');
+    menuButtonEl.setAttribute(
+      'aria-expanded',
+      headerEl.classList.contains('is-active')
+    );
   });
-  if (toc_items.length <= 1) {
-    return;
-  }
-  var dl1 = $('<dl/>');
-  var dl2 = $('<dl/>');
 
-  var split_index = (toc_items.length / 2) + 1;
-  if (split_index < 8) {
-    split_index = toc_items.length;
-  }
-  for (var i = 0; i < split_index; i++) {
-    dl1.append(toc_items[i]);
-  }
-  for (/* keep using i */; i < toc_items.length; i++) {
-    dl2.append(toc_items[i]);
-  }
-
-  var tocTable = $('<table class="unruled"/>').appendTo(nav);
-  var tocBody = $('<tbody/>').appendTo(tocTable);
-  var tocRow = $('<tr/>').appendTo(tocBody);
-
-  // 1st column
-  $('<td class="first"/>').appendTo(tocRow).append(dl1);
-  // 2nd column
-  $('<td/>').appendTo(tocRow).append(dl2);
-}
-
-function bindToggle(el) {
-  $('.toggleButton', el).click(function() {
-    if ($(this).closest(".toggle, .toggleVisible")[0] != el) {
-      // Only trigger the closest toggle header.
+  /* Generates a table of contents: looks for h2 and h3 elements and generates
+   * links. "Decorates" the element with id=="nav" with this table of contents.
+   */
+  function generateTOC() {
+    if ($('#manual-nav').length > 0) {
       return;
     }
 
-    if ($(el).is('.toggle')) {
-      $(el).addClass('toggleVisible').removeClass('toggle');
-    } else {
-      $(el).addClass('toggle').removeClass('toggleVisible');
-    }
-  });
-}
-
-function bindToggles(selector) {
-  $(selector).each(function(i, el) {
-    bindToggle(el);
-  });
-}
-
-function bindToggleLink(el, prefix) {
-  $(el).click(function() {
-    var href = $(el).attr('href');
-    var i = href.indexOf('#'+prefix);
-    if (i < 0) {
+    // For search, we send the toc precomputed from server-side.
+    // TODO: Ideally, this should always be precomputed for all pages, but then
+    // we need to do HTML parsing on the server-side.
+    if (location.pathname === '/search') {
       return;
     }
-    var id = '#' + prefix + href.slice(i+1+prefix.length);
-    if ($(id).is('.toggle')) {
-      $(id).find('.toggleButton').first().click();
+
+    var nav = $('#nav');
+    if (nav.length === 0) {
+      return;
     }
-  });
-}
-function bindToggleLinks(selector, prefix) {
-  $(selector).each(function(i, el) {
-    bindToggleLink(el, prefix);
-  });
-}
 
-function setupInlinePlayground() {
-	'use strict';
-	// Set up playground when each element is toggled.
-	$('div.play').each(function (i, el) {
-		// Set up playground for this example.
-		var setup = function() {
-			var code = $('.code', el);
-			playground({
-				'codeEl':   code,
-				'outputEl': $('.output', el),
-				'runEl':    $('.run', el),
-				'fmtEl':    $('.fmt', el),
-				'shareEl':  $('.share', el),
-				'shareRedirect': '//play.golang.org/p/'
-			});
+    var toc_items = [];
+    $(nav)
+      .nextAll('h2, h3')
+      .each(function() {
+        var node = this;
+        if (node.id == '') node.id = 'tmp_' + toc_items.length;
+        var link = $('<a/>')
+          .attr('href', '#' + node.id)
+          .text($(node).text());
+        var item;
+        if ($(node).is('h2')) {
+          item = $('<dt/>');
+        } else {
+          // h3
+          item = $('<dd class="indent"/>');
+        }
+        item.append(link);
+        toc_items.push(item);
+      });
+    if (toc_items.length <= 1) {
+      return;
+    }
+    var dl1 = $('<dl/>');
+    var dl2 = $('<dl/>');
 
-			// Make the code textarea resize to fit content.
-			var resize = function() {
-				code.height(0);
-				var h = code[0].scrollHeight;
-				code.height(h+20); // minimize bouncing.
-				code.closest('.input').height(h);
-			};
-			code.on('keydown', resize);
-			code.on('keyup', resize);
-			code.keyup(); // resize now.
-		};
+    var split_index = toc_items.length / 2 + 1;
+    if (split_index < 8) {
+      split_index = toc_items.length;
+    }
+    for (var i = 0; i < split_index; i++) {
+      dl1.append(toc_items[i]);
+    }
+    for (; /* keep using i */ i < toc_items.length; i++) {
+      dl2.append(toc_items[i]);
+    }
 
-		// If example already visible, set up playground now.
-		if ($(el).is(':visible')) {
-			setup();
-			return;
-		}
+    var tocTable = $('<table class="unruled"/>').appendTo(nav);
+    var tocBody = $('<tbody/>').appendTo(tocTable);
+    var tocRow = $('<tr/>').appendTo(tocBody);
 
-		// Otherwise, set up playground when example is expanded.
-		var built = false;
-		$(el).closest('.toggle').click(function() {
-			// Only set up once.
-			if (!built) {
-				setup();
-				built = true;
-			}
-		});
-	});
-}
+    // 1st column
+    $('<td class="first"/>')
+      .appendTo(tocRow)
+      .append(dl1);
+    // 2nd column
+    $('<td/>')
+      .appendTo(tocRow)
+      .append(dl2);
+  }
 
-// fixFocus tries to put focus to #page so that keyboard navigation works.
-function fixFocus() {
-  var page = $('#page');
-  var topbar = $('div#topbar');
-  page.css('outline', 0); // disable outline when focused
-  page.attr('tabindex', -1); // and set tabindex so that it is focusable
-  $(window).resize(function (evt) {
-    // only focus page when the topbar is at fixed position (that is, it's in
-    // front of page, and keyboard event will go to the former by default.)
-    // by focusing page, keyboard event will go to page so that up/down arrow,
-    // space, etc. will work as expected.
-    if (topbar.css('position') == "fixed")
-      page.focus();
-  }).resize();
-}
-
-function toggleHash() {
-  var id = window.location.hash.substring(1);
-  // Open all of the toggles for a particular hash.
-  var els = $(
-    document.getElementById(id),
-    $('a[name]').filter(function() {
-      return $(this).attr('name') == id;
-    })
-  );
-
-  while (els.length) {
-    for (var i = 0; i < els.length; i++) {
-      var el = $(els[i]);
-      if (el.is('.toggle')) {
-        el.find('.toggleButton').first().click();
+  function bindToggle(el) {
+    $('.toggleButton', el).click(function() {
+      if ($(this).closest('.toggle, .toggleVisible')[0] != el) {
+        // Only trigger the closest toggle header.
+        return;
       }
-    }
-    els = el.parent();
-  }
-}
 
-function personalizeInstallInstructions() {
-  var prefix = '?download=';
-  var s = window.location.search;
-  if (s.indexOf(prefix) != 0) {
-    // No 'download' query string; detect "test" instructions from User Agent.
-    if (navigator.platform.indexOf('Win') != -1) {
-      $('.testUnix').hide();
-      $('.testWindows').show();
-    } else {
+      if ($(el).is('.toggle')) {
+        $(el)
+          .addClass('toggleVisible')
+          .removeClass('toggle');
+      } else {
+        $(el)
+          .addClass('toggle')
+          .removeClass('toggleVisible');
+      }
+    });
+  }
+
+  function bindToggles(selector) {
+    $(selector).each(function(i, el) {
+      bindToggle(el);
+    });
+  }
+
+  function bindToggleLink(el, prefix) {
+    $(el).click(function() {
+      var href = $(el).attr('href');
+      var i = href.indexOf('#' + prefix);
+      if (i < 0) {
+        return;
+      }
+      var id = '#' + prefix + href.slice(i + 1 + prefix.length);
+      if ($(id).is('.toggle')) {
+        $(id)
+          .find('.toggleButton')
+          .first()
+          .click();
+      }
+    });
+  }
+  function bindToggleLinks(selector, prefix) {
+    $(selector).each(function(i, el) {
+      bindToggleLink(el, prefix);
+    });
+  }
+
+  function setupInlinePlayground() {
+    'use strict';
+    // Set up playground when each element is toggled.
+    $('div.play').each(function(i, el) {
+      // Set up playground for this example.
+      var setup = function() {
+        var code = $('.code', el);
+        playground({
+          codeEl: code,
+          outputEl: $('.output', el),
+          runEl: $('.run', el),
+          fmtEl: $('.fmt', el),
+          shareEl: $('.share', el),
+          shareRedirect: '//play.golang.org/p/',
+        });
+
+        // Make the code textarea resize to fit content.
+        var resize = function() {
+          code.height(0);
+          var h = code[0].scrollHeight;
+          code.height(h + 20); // minimize bouncing.
+          code.closest('.input').height(h);
+        };
+        code.on('keydown', resize);
+        code.on('keyup', resize);
+        code.keyup(); // resize now.
+      };
+
+      // If example already visible, set up playground now.
+      if ($(el).is(':visible')) {
+        setup();
+        return;
+      }
+
+      // Otherwise, set up playground when example is expanded.
+      var built = false;
+      $(el)
+        .closest('.toggle')
+        .click(function() {
+          // Only set up once.
+          if (!built) {
+            setup();
+            built = true;
+          }
+        });
+    });
+  }
+
+  // fixFocus tries to put focus to #page so that keyboard navigation works.
+  function fixFocus() {
+    var page = $('#page');
+    var topbar = $('div#topbar');
+    page.css('outline', 0); // disable outline when focused
+    page.attr('tabindex', -1); // and set tabindex so that it is focusable
+    $(window)
+      .resize(function(evt) {
+        // only focus page when the topbar is at fixed position (that is, it's in
+        // front of page, and keyboard event will go to the former by default.)
+        // by focusing page, keyboard event will go to page so that up/down arrow,
+        // space, etc. will work as expected.
+        if (topbar.css('position') == 'fixed') page.focus();
+      })
+      .resize();
+  }
+
+  function toggleHash() {
+    var id = window.location.hash.substring(1);
+    // Open all of the toggles for a particular hash.
+    var els = $(
+      document.getElementById(id),
+      $('a[name]').filter(function() {
+        return $(this).attr('name') == id;
+      })
+    );
+
+    while (els.length) {
+      for (var i = 0; i < els.length; i++) {
+        var el = $(els[i]);
+        if (el.is('.toggle')) {
+          el.find('.toggleButton')
+            .first()
+            .click();
+        }
+      }
+      els = el.parent();
+    }
+  }
+
+  function personalizeInstallInstructions() {
+    var prefix = '?download=';
+    var s = window.location.search;
+    if (s.indexOf(prefix) != 0) {
+      // No 'download' query string; detect "test" instructions from User Agent.
+      if (navigator.platform.indexOf('Win') != -1) {
+        $('.testUnix').hide();
+        $('.testWindows').show();
+      } else {
+        $('.testUnix').show();
+        $('.testWindows').hide();
+      }
+      return;
+    }
+
+    var filename = s.substr(prefix.length);
+    var filenameRE = /^go1\.\d+(\.\d+)?([a-z0-9]+)?\.([a-z0-9]+)(-[a-z0-9]+)?(-osx10\.[68])?\.([a-z.]+)$/;
+    var m = filenameRE.exec(filename);
+    if (!m) {
+      // Can't interpret file name; bail.
+      return;
+    }
+    $('.downloadFilename').text(filename);
+    $('.hideFromDownload').hide();
+
+    var os = m[3];
+    var ext = m[6];
+    if (ext != 'tar.gz') {
+      $('#tarballInstructions').hide();
+    }
+    if (os != 'darwin' || ext != 'pkg') {
+      $('#darwinPackageInstructions').hide();
+    }
+    if (os != 'windows') {
+      $('#windowsInstructions').hide();
       $('.testUnix').show();
       $('.testWindows').hide();
+    } else {
+      if (ext != 'msi') {
+        $('#windowsInstallerInstructions').hide();
+      }
+      if (ext != 'zip') {
+        $('#windowsZipInstructions').hide();
+      }
+      $('.testUnix').hide();
+      $('.testWindows').show();
     }
-    return;
+
+    var download = 'https://dl.google.com/go/' + filename;
+
+    var message = $(
+      '<p class="downloading">' +
+        'Your download should begin shortly. ' +
+        'If it does not, click <a>this link</a>.</p>'
+    );
+    message.find('a').attr('href', download);
+    message.insertAfter('#nav');
+
+    window.location = download;
   }
 
-  var filename = s.substr(prefix.length);
-  var filenameRE = /^go1\.\d+(\.\d+)?([a-z0-9]+)?\.([a-z0-9]+)(-[a-z0-9]+)?(-osx10\.[68])?\.([a-z.]+)$/;
-  var m = filenameRE.exec(filename);
-  if (!m) {
-    // Can't interpret file name; bail.
-    return;
-  }
-  $('.downloadFilename').text(filename);
-  $('.hideFromDownload').hide();
-
-  var os = m[3];
-  var ext = m[6];
-  if (ext != 'tar.gz') {
-    $('#tarballInstructions').hide();
-  }
-  if (os != 'darwin' || ext != 'pkg') {
-    $('#darwinPackageInstructions').hide();
-  }
-  if (os != 'windows') {
-    $('#windowsInstructions').hide();
-    $('.testUnix').show();
-    $('.testWindows').hide();
-  } else {
-    if (ext != 'msi') {
-      $('#windowsInstallerInstructions').hide();
+  function updateVersionTags() {
+    var v = window.goVersion;
+    if (/^go[0-9.]+$/.test(v)) {
+      $('.versionTag')
+        .empty()
+        .text(v);
+      $('.whereTag').hide();
     }
-    if (ext != 'zip') {
-      $('#windowsZipInstructions').hide();
-    }
-    $('.testUnix').hide();
-    $('.testWindows').show();
   }
 
-  var download = "https://dl.google.com/go/" + filename;
-
-  var message = $('<p class="downloading">'+
-    'Your download should begin shortly. '+
-    'If it does not, click <a>this link</a>.</p>');
-  message.find('a').attr('href', download);
-  message.insertAfter('#nav');
-
-  window.location = download;
-}
-
-function updateVersionTags() {
-  var v = window.goVersion;
-  if (/^go[0-9.]+$/.test(v)) {
-    $(".versionTag").empty().text(v);
-    $(".whereTag").hide();
-  }
-}
-
-function addPermalinks() {
-  function addPermalink(source, parent) {
-    var id = source.attr("id");
-    if (id == "" || id.indexOf("tmp_") === 0) {
-      // Auto-generated permalink.
-      return;
+  function addPermalinks() {
+    function addPermalink(source, parent) {
+      var id = source.attr('id');
+      if (id == '' || id.indexOf('tmp_') === 0) {
+        // Auto-generated permalink.
+        return;
+      }
+      if (parent.find('> .permalink').length) {
+        // Already attached.
+        return;
+      }
+      parent
+        .append(' ')
+        .append($("<a class='permalink'>&#xb6;</a>").attr('href', '#' + id));
     }
-    if (parent.find("> .permalink").length) {
-      // Already attached.
-      return;
-    }
-    parent.append(" ").append($("<a class='permalink'>&#xb6;</a>").attr("href", "#" + id));
+
+    $('#page .container')
+      .find('h2[id], h3[id]')
+      .each(function() {
+        var el = $(this);
+        addPermalink(el, el);
+      });
+
+    $('#page .container')
+      .find('dl[id]')
+      .each(function() {
+        var el = $(this);
+        // Add the anchor to the "dt" element.
+        addPermalink(el, el.find('> dt').first());
+      });
   }
 
-  $("#page .container").find("h2[id], h3[id]").each(function() {
-    var el = $(this);
-    addPermalink(el, el);
+  $('.js-expandAll').click(function() {
+    if ($(this).hasClass('collapsed')) {
+      toggleExamples('toggle');
+      $(this).text('(Collapse All)');
+    } else {
+      toggleExamples('toggleVisible');
+      $(this).text('(Expand All)');
+    }
+    $(this).toggleClass('collapsed');
   });
 
-  $("#page .container").find("dl[id]").each(function() {
-    var el = $(this);
-    // Add the anchor to the "dt" element.
-    addPermalink(el, el.find("> dt").first());
-  });
-}
-
-$(".js-expandAll").click(function() {
-  if ($(this).hasClass("collapsed")) {
-    toggleExamples('toggle');
-    $(this).text("(Collapse All)");
-  } else {
-    toggleExamples('toggleVisible');
-    $(this).text("(Expand All)");
+  function toggleExamples(className) {
+    // We need to explicitly iterate through divs starting with "example_"
+    // to avoid toggling Overview and Index collapsibles.
+    $("[id^='example_']").each(function() {
+      // Check for state and click it only if required.
+      if ($(this).hasClass(className)) {
+        $(this)
+          .find('.toggleButton')
+          .first()
+          .click();
+      }
+    });
   }
-  $(this).toggleClass("collapsed")
-});
 
-function toggleExamples(className) {
-  // We need to explicitly iterate through divs starting with "example_"
-  // to avoid toggling Overview and Index collapsibles.
-  $("[id^='example_']").each(function() {
-    // Check for state and click it only if required.
-    if ($(this).hasClass(className)) {
-      $(this).find('.toggleButton').first().click();
-    }
+  $(document).ready(function() {
+    generateTOC();
+    addPermalinks();
+    bindToggles('.toggle');
+    bindToggles('.toggleVisible');
+    bindToggleLinks('.exampleLink', 'example_');
+    bindToggleLinks('.overviewLink', '');
+    bindToggleLinks('.examplesLink', '');
+    bindToggleLinks('.indexLink', '');
+    setupInlinePlayground();
+    fixFocus();
+    toggleHash();
+    personalizeInstallInstructions();
+    updateVersionTags();
+
+    // godoc.html defines window.initFuncs in the <head> tag, and root.html and
+    // codewalk.js push their on-page-ready functions to the list.
+    // We execute those functions here, to avoid loading jQuery until the page
+    // content is loaded.
+    for (var i = 0; i < window.initFuncs.length; i++) window.initFuncs[i]();
   });
-}
-
-$(document).ready(function() {
-  generateTOC();
-  addPermalinks();
-  bindToggles(".toggle");
-  bindToggles(".toggleVisible");
-  bindToggleLinks(".exampleLink", "example_");
-  bindToggleLinks(".overviewLink", "");
-  bindToggleLinks(".examplesLink", "");
-  bindToggleLinks(".indexLink", "");
-  setupInlinePlayground();
-  fixFocus();
-  toggleHash();
-  personalizeInstallInstructions();
-  updateVersionTags();
-
-  // godoc.html defines window.initFuncs in the <head> tag, and root.html and
-  // codewalk.js push their on-page-ready functions to the list.
-  // We execute those functions here, to avoid loading jQuery until the page
-  // content is loaded.
-  for (var i = 0; i < window.initFuncs.length; i++) window.initFuncs[i]();
-});
-
 })();
diff --git a/content/static/play.js b/content/static/play.js
index 6adbd6c..0a10165 100644
--- a/content/static/play.js
+++ b/content/static/play.js
@@ -3,112 +3,112 @@
 // license that can be found in the LICENSE file.
 
 function initPlayground(transport) {
-	'use strict';
+  'use strict';
 
-	function text(node) {
-		var s = '';
-		for (var i = 0; i < node.childNodes.length; i++) {
-			var n = node.childNodes[i];
-			if (n.nodeType === 1) {
-				if (n.tagName === 'BUTTON') continue
-				if (n.tagName === 'SPAN' && n.className === 'number') continue;
-				if (n.tagName === 'DIV' || n.tagName == 'BR') {
-					s += "\n";
-				}
-				s += text(n);
-				continue;
-			}
-			if (n.nodeType === 3) {
-				s += n.nodeValue;
-			}
-		}
-		return s.replace('\xA0', ' '); // replace non-breaking spaces
-	}
+  function text(node) {
+    var s = '';
+    for (var i = 0; i < node.childNodes.length; i++) {
+      var n = node.childNodes[i];
+      if (n.nodeType === 1) {
+        if (n.tagName === 'BUTTON') continue;
+        if (n.tagName === 'SPAN' && n.className === 'number') continue;
+        if (n.tagName === 'DIV' || n.tagName == 'BR') {
+          s += '\n';
+        }
+        s += text(n);
+        continue;
+      }
+      if (n.nodeType === 3) {
+        s += n.nodeValue;
+      }
+    }
+    return s.replace('\xA0', ' '); // replace non-breaking spaces
+  }
 
-	// When presenter notes are enabled, the index passed
-	// here will identify the playground to be synced
-	function init(code, index) {
-		var output = document.createElement('div');
-		var outpre = document.createElement('pre');
-		var running;
+  // When presenter notes are enabled, the index passed
+  // here will identify the playground to be synced
+  function init(code, index) {
+    var output = document.createElement('div');
+    var outpre = document.createElement('pre');
+    var running;
 
-		if ($ && $(output).resizable) {
-			$(output).resizable({
-				handles: 	'n,w,nw',
-				minHeight:	27,
-				minWidth:	135,
-				maxHeight:	608,
-				maxWidth:	990
-			});
-		}
+    if ($ && $(output).resizable) {
+      $(output).resizable({
+        handles: 'n,w,nw',
+        minHeight: 27,
+        minWidth: 135,
+        maxHeight: 608,
+        maxWidth: 990,
+      });
+    }
 
-		function onKill() {
-			if (running) running.Kill();
-			if (window.notesEnabled) updatePlayStorage('onKill', index);
-		}
+    function onKill() {
+      if (running) running.Kill();
+      if (window.notesEnabled) updatePlayStorage('onKill', index);
+    }
 
-		function onRun(e) {
-			var sk = e.shiftKey || localStorage.getItem('play-shiftKey') === 'true';
-			if (running) running.Kill();
-			output.style.display = 'block';
-			outpre.innerHTML = '';
-			run1.style.display = 'none';
-			var options = {Race: sk};
-			running = transport.Run(text(code), PlaygroundOutput(outpre), options);
-			if (window.notesEnabled) updatePlayStorage('onRun', index, e);
-		}
+    function onRun(e) {
+      var sk = e.shiftKey || localStorage.getItem('play-shiftKey') === 'true';
+      if (running) running.Kill();
+      output.style.display = 'block';
+      outpre.innerHTML = '';
+      run1.style.display = 'none';
+      var options = { Race: sk };
+      running = transport.Run(text(code), PlaygroundOutput(outpre), options);
+      if (window.notesEnabled) updatePlayStorage('onRun', index, e);
+    }
 
-		function onClose() {
-			if (running) running.Kill();
-			output.style.display = 'none';
-			run1.style.display = 'inline-block';
-			if (window.notesEnabled) updatePlayStorage('onClose', index);
-		}
+    function onClose() {
+      if (running) running.Kill();
+      output.style.display = 'none';
+      run1.style.display = 'inline-block';
+      if (window.notesEnabled) updatePlayStorage('onClose', index);
+    }
 
-		if (window.notesEnabled) {
-			playgroundHandlers.onRun.push(onRun);
-			playgroundHandlers.onClose.push(onClose);
-			playgroundHandlers.onKill.push(onKill);
-		}
+    if (window.notesEnabled) {
+      playgroundHandlers.onRun.push(onRun);
+      playgroundHandlers.onClose.push(onClose);
+      playgroundHandlers.onKill.push(onKill);
+    }
 
-		var run1 = document.createElement('button');
-		run1.innerHTML = 'Run';
-		run1.className = 'run';
-		run1.addEventListener("click", onRun, false);
-		var run2 = document.createElement('button');
-		run2.className = 'run';
-		run2.innerHTML = 'Run';
-		run2.addEventListener("click", onRun, false);
-		var kill = document.createElement('button');
-		kill.className = 'kill';
-		kill.innerHTML = 'Kill';
-		kill.addEventListener("click", onKill, false);
-		var close = document.createElement('button');
-		close.className = 'close';
-		close.innerHTML = 'Close';
-		close.addEventListener("click", onClose, false);
+    var run1 = document.createElement('button');
+    run1.innerHTML = 'Run';
+    run1.className = 'run';
+    run1.addEventListener('click', onRun, false);
+    var run2 = document.createElement('button');
+    run2.className = 'run';
+    run2.innerHTML = 'Run';
+    run2.addEventListener('click', onRun, false);
+    var kill = document.createElement('button');
+    kill.className = 'kill';
+    kill.innerHTML = 'Kill';
+    kill.addEventListener('click', onKill, false);
+    var close = document.createElement('button');
+    close.className = 'close';
+    close.innerHTML = 'Close';
+    close.addEventListener('click', onClose, false);
 
-		var button = document.createElement('div');
-		button.classList.add('buttons');
-		button.appendChild(run1);
-		// Hack to simulate insertAfter
-		code.parentNode.insertBefore(button, code.nextSibling);
+    var button = document.createElement('div');
+    button.classList.add('buttons');
+    button.appendChild(run1);
+    // Hack to simulate insertAfter
+    code.parentNode.insertBefore(button, code.nextSibling);
 
-		var buttons = document.createElement('div');
-		buttons.classList.add('buttons');
-		buttons.appendChild(run2);
-		buttons.appendChild(kill);
-		buttons.appendChild(close);
+    var buttons = document.createElement('div');
+    buttons.classList.add('buttons');
+    buttons.appendChild(run2);
+    buttons.appendChild(kill);
+    buttons.appendChild(close);
 
-		output.classList.add('output');
-		output.appendChild(buttons);
-		output.appendChild(outpre);
-		output.style.display = 'none';
-		code.parentNode.insertBefore(output, button.nextSibling);
-	}
+    output.classList.add('output');
+    output.appendChild(buttons);
+    output.appendChild(outpre);
+    output.style.display = 'none';
+    code.parentNode.insertBefore(output, button.nextSibling);
+  }
 
-	var play = document.querySelectorAll('div.playground');
-	for (var i = 0; i < play.length; i++) {
-		init(play[i], i);
-	}
+  var play = document.querySelectorAll('div.playground');
+  for (var i = 0; i < play.length; i++) {
+    init(play[i], i);
+  }
 }
diff --git a/content/static/playground.js b/content/static/playground.js
index 524bc28..97391d1 100644
--- a/content/static/playground.js
+++ b/content/static/playground.js
@@ -44,230 +44,243 @@
 // enableVet enables running vet if a program was compiled and ran successfully.
 // If vet returned any errors, display them before the output of a program.
 function HTTPTransport(enableVet) {
-	'use strict';
+  'use strict';
 
-	function playback(output, data) {
-		// Backwards compatibility: default values do not affect the output.
-		var events = data.Events || [];
-		var errors = data.Errors || "";
-		var status = data.Status || 0;
-		var isTest = data.IsTest || false;
-		var testsFailed = data.TestsFailed || 0;
+  function playback(output, data) {
+    // Backwards compatibility: default values do not affect the output.
+    var events = data.Events || [];
+    var errors = data.Errors || '';
+    var status = data.Status || 0;
+    var isTest = data.IsTest || false;
+    var testsFailed = data.TestsFailed || 0;
 
-		var timeout;
-		output({Kind: 'start'});
-		function next() {
-			if (!events || events.length === 0) {
-				if (isTest) {
-					if (testsFailed > 0) {
-						output({Kind: 'system', Body: '\n'+testsFailed+' test'+(testsFailed>1?'s':'')+' failed.'});
-					} else {
-						output({Kind: 'system', Body: '\nAll tests passed.'});
-					}
-				} else {
-					if (status > 0) {
-						output({Kind: 'end', Body: 'status ' + status + '.'});
-					} else {
-						if (errors !== "") {
-							// errors are displayed only in the case of timeout.
-							output({Kind: 'end', Body: errors + '.'});
-						} else {
-							output({Kind: 'end'});
-						}
-					}
-				}
-				return;
-			}
-			var e = events.shift();
-			if (e.Delay === 0) {
-				output({Kind: e.Kind, Body: e.Message});
-				next();
-				return;
-			}
-			timeout = setTimeout(function() {
-				output({Kind: e.Kind, Body: e.Message});
-				next();
-			}, e.Delay / 1000000);
-		}
-		next();
-		return {
-			Stop: function() {
-				clearTimeout(timeout);
-			}
-		};
-	}
+    var timeout;
+    output({ Kind: 'start' });
+    function next() {
+      if (!events || events.length === 0) {
+        if (isTest) {
+          if (testsFailed > 0) {
+            output({
+              Kind: 'system',
+              Body:
+                '\n' +
+                testsFailed +
+                ' test' +
+                (testsFailed > 1 ? 's' : '') +
+                ' failed.',
+            });
+          } else {
+            output({ Kind: 'system', Body: '\nAll tests passed.' });
+          }
+        } else {
+          if (status > 0) {
+            output({ Kind: 'end', Body: 'status ' + status + '.' });
+          } else {
+            if (errors !== '') {
+              // errors are displayed only in the case of timeout.
+              output({ Kind: 'end', Body: errors + '.' });
+            } else {
+              output({ Kind: 'end' });
+            }
+          }
+        }
+        return;
+      }
+      var e = events.shift();
+      if (e.Delay === 0) {
+        output({ Kind: e.Kind, Body: e.Message });
+        next();
+        return;
+      }
+      timeout = setTimeout(function() {
+        output({ Kind: e.Kind, Body: e.Message });
+        next();
+      }, e.Delay / 1000000);
+    }
+    next();
+    return {
+      Stop: function() {
+        clearTimeout(timeout);
+      },
+    };
+  }
 
-	function error(output, msg) {
-		output({Kind: 'start'});
-		output({Kind: 'stderr', Body: msg});
-		output({Kind: 'end'});
-	}
+  function error(output, msg) {
+    output({ Kind: 'start' });
+    output({ Kind: 'stderr', Body: msg });
+    output({ Kind: 'end' });
+  }
 
-	function buildFailed(output, msg) {
-		output({Kind: 'start'});
-		output({Kind: 'stderr', Body: msg});
-		output({Kind: 'system', Body: '\nGo build failed.'});
-	}
+  function buildFailed(output, msg) {
+    output({ Kind: 'start' });
+    output({ Kind: 'stderr', Body: msg });
+    output({ Kind: 'system', Body: '\nGo build failed.' });
+  }
 
-	var seq = 0;
-	return {
-		Run: function(body, output, options) {
-			seq++;
-			var cur = seq;
-			var playing;
-			$.ajax('/compile', {
-				type: 'POST',
-				data: {'version': 2, 'body': body},
-				dataType: 'json',
-				success: function(data) {
-					if (seq != cur) return;
-					if (!data) return;
-					if (playing != null) playing.Stop();
-					if (data.Errors) {
-						if (data.Errors === 'process took too long') {
-							// Playback the output that was captured before the timeout.
-							playing = playback(output, data);
-						} else {
-							buildFailed(output, data.Errors);
-						}
-						return;
-					}
+  var seq = 0;
+  return {
+    Run: function(body, output, options) {
+      seq++;
+      var cur = seq;
+      var playing;
+      $.ajax('/compile', {
+        type: 'POST',
+        data: { version: 2, body: body },
+        dataType: 'json',
+        success: function(data) {
+          if (seq != cur) return;
+          if (!data) return;
+          if (playing != null) playing.Stop();
+          if (data.Errors) {
+            if (data.Errors === 'process took too long') {
+              // Playback the output that was captured before the timeout.
+              playing = playback(output, data);
+            } else {
+              buildFailed(output, data.Errors);
+            }
+            return;
+          }
 
-					if (!enableVet) {
-						playing = playback(output, data);
-						return;
-					}
+          if (!enableVet) {
+            playing = playback(output, data);
+            return;
+          }
 
-					$.ajax("/vet", {
-						data: {"body": body},
-						type: "POST",
-						dataType: "json",
-						success: function(dataVet) {
-							if (dataVet.Errors) {
-								if (!data.Events) {
-									data.Events = [];
-								}
-								// inject errors from the vet as the first events in the output
-								data.Events.unshift({Message: 'Go vet exited.\n\n', Kind: 'system', Delay: 0});
-								data.Events.unshift({Message: dataVet.Errors, Kind: 'stderr', Delay: 0});
-							}
-							playing = playback(output, data);
-						},
-						error: function() {
-							playing = playback(output, data);
-						}
-					});
-				},
-				error: function() {
-					error(output, 'Error communicating with remote server.');
-				}
-			});
-			return {
-				Kill: function() {
-					if (playing != null) playing.Stop();
-					output({Kind: 'end', Body: 'killed'});
-				}
-			};
-		}
-	};
+          $.ajax('/vet', {
+            data: { body: body },
+            type: 'POST',
+            dataType: 'json',
+            success: function(dataVet) {
+              if (dataVet.Errors) {
+                if (!data.Events) {
+                  data.Events = [];
+                }
+                // inject errors from the vet as the first events in the output
+                data.Events.unshift({
+                  Message: 'Go vet exited.\n\n',
+                  Kind: 'system',
+                  Delay: 0,
+                });
+                data.Events.unshift({
+                  Message: dataVet.Errors,
+                  Kind: 'stderr',
+                  Delay: 0,
+                });
+              }
+              playing = playback(output, data);
+            },
+            error: function() {
+              playing = playback(output, data);
+            },
+          });
+        },
+        error: function() {
+          error(output, 'Error communicating with remote server.');
+        },
+      });
+      return {
+        Kill: function() {
+          if (playing != null) playing.Stop();
+          output({ Kind: 'end', Body: 'killed' });
+        },
+      };
+    },
+  };
 }
 
 function SocketTransport() {
-	'use strict';
+  'use strict';
 
-	var id = 0;
-	var outputs = {};
-	var started = {};
-	var websocket;
-	if (window.location.protocol == "http:") {
-		websocket = new WebSocket('ws://' + window.location.host + '/socket');
-	} else if (window.location.protocol == "https:") {
-		websocket = new WebSocket('wss://' + window.location.host + '/socket');
-	}
+  var id = 0;
+  var outputs = {};
+  var started = {};
+  var websocket;
+  if (window.location.protocol == 'http:') {
+    websocket = new WebSocket('ws://' + window.location.host + '/socket');
+  } else if (window.location.protocol == 'https:') {
+    websocket = new WebSocket('wss://' + window.location.host + '/socket');
+  }
 
-	websocket.onclose = function() {
-		console.log('websocket connection closed');
-	};
+  websocket.onclose = function() {
+    console.log('websocket connection closed');
+  };
 
-	websocket.onmessage = function(e) {
-		var m = JSON.parse(e.data);
-		var output = outputs[m.Id];
-		if (output === null)
-			return;
-		if (!started[m.Id]) {
-			output({Kind: 'start'});
-			started[m.Id] = true;
-		}
-		output({Kind: m.Kind, Body: m.Body});
-	};
+  websocket.onmessage = function(e) {
+    var m = JSON.parse(e.data);
+    var output = outputs[m.Id];
+    if (output === null) return;
+    if (!started[m.Id]) {
+      output({ Kind: 'start' });
+      started[m.Id] = true;
+    }
+    output({ Kind: m.Kind, Body: m.Body });
+  };
 
-	function send(m) {
-		websocket.send(JSON.stringify(m));
-	}
+  function send(m) {
+    websocket.send(JSON.stringify(m));
+  }
 
-	return {
-		Run: function(body, output, options) {
-			var thisID = id+'';
-			id++;
-			outputs[thisID] = output;
-			send({Id: thisID, Kind: 'run', Body: body, Options: options});
-			return {
-				Kill: function() {
-					send({Id: thisID, Kind: 'kill'});
-				}
-			};
-		}
-	};
+  return {
+    Run: function(body, output, options) {
+      var thisID = id + '';
+      id++;
+      outputs[thisID] = output;
+      send({ Id: thisID, Kind: 'run', Body: body, Options: options });
+      return {
+        Kill: function() {
+          send({ Id: thisID, Kind: 'kill' });
+        },
+      };
+    },
+  };
 }
 
 function PlaygroundOutput(el) {
-	'use strict';
+  'use strict';
 
-	return function(write) {
-		if (write.Kind == 'start') {
-			el.innerHTML = '';
-			return;
-		}
+  return function(write) {
+    if (write.Kind == 'start') {
+      el.innerHTML = '';
+      return;
+    }
 
-		var cl = 'system';
-		if (write.Kind == 'stdout' || write.Kind == 'stderr')
-			cl = write.Kind;
+    var cl = 'system';
+    if (write.Kind == 'stdout' || write.Kind == 'stderr') cl = write.Kind;
 
-		var m = write.Body;
-		if (write.Kind == 'end') {
-			m = '\nProgram exited' + (m?(': '+m):'.');
-		}
+    var m = write.Body;
+    if (write.Kind == 'end') {
+      m = '\nProgram exited' + (m ? ': ' + m : '.');
+    }
 
-		if (m.indexOf('IMAGE:') === 0) {
-			// TODO(adg): buffer all writes before creating image
-			var url = 'data:image/png;base64,' + m.substr(6);
-			var img = document.createElement('img');
-			img.src = url;
-			el.appendChild(img);
-			return;
-		}
+    if (m.indexOf('IMAGE:') === 0) {
+      // TODO(adg): buffer all writes before creating image
+      var url = 'data:image/png;base64,' + m.substr(6);
+      var img = document.createElement('img');
+      img.src = url;
+      el.appendChild(img);
+      return;
+    }
 
-		// ^L clears the screen.
-		var s = m.split('\x0c');
-		if (s.length > 1) {
-			el.innerHTML = '';
-			m = s.pop();
-		}
+    // ^L clears the screen.
+    var s = m.split('\x0c');
+    if (s.length > 1) {
+      el.innerHTML = '';
+      m = s.pop();
+    }
 
-		m = m.replace(/&/g, '&amp;');
-		m = m.replace(/</g, '&lt;');
-		m = m.replace(/>/g, '&gt;');
+    m = m.replace(/&/g, '&amp;');
+    m = m.replace(/</g, '&lt;');
+    m = m.replace(/>/g, '&gt;');
 
-		var needScroll = (el.scrollTop + el.offsetHeight) == el.scrollHeight;
+    var needScroll = el.scrollTop + el.offsetHeight == el.scrollHeight;
 
-		var span = document.createElement('span');
-		span.className = cl;
-		span.innerHTML = m;
-		el.appendChild(span);
+    var span = document.createElement('span');
+    span.className = cl;
+    span.innerHTML = m;
+    el.appendChild(span);
 
-		if (needScroll)
-			el.scrollTop = el.scrollHeight - el.offsetHeight;
-	};
+    if (needScroll) el.scrollTop = el.scrollHeight - el.offsetHeight;
+  };
 }
 
 (function() {
@@ -275,7 +288,9 @@
     var regex = /prog.go:([0-9]+)/g;
     var r = regex.exec(error);
     while (r) {
-      $(".lines div").eq(r[1]-1).addClass("lineerror");
+      $('.lines div')
+        .eq(r[1] - 1)
+        .addClass('lineerror');
       r = regex.exec(error);
     }
   }
@@ -286,7 +301,7 @@
     };
   }
   function lineClear() {
-    $(".lineerror").removeClass("lineerror");
+    $('.lineerror').removeClass('lineerror');
   }
 
   // opts is an object with these keys
@@ -312,28 +327,28 @@
     function insertTabs(n) {
       // find the selection start and end
       var start = code[0].selectionStart;
-      var end   = code[0].selectionEnd;
+      var end = code[0].selectionEnd;
       // split the textarea content into two, and insert n tabs
       var v = code[0].value;
       var u = v.substr(0, start);
-      for (var i=0; i<n; i++) {
-        u += "\t";
+      for (var i = 0; i < n; i++) {
+        u += '\t';
       }
       u += v.substr(end);
       // set revised content
       code[0].value = u;
       // reset caret position after inserted tabs
-      code[0].selectionStart = start+n;
-      code[0].selectionEnd = start+n;
+      code[0].selectionStart = start + n;
+      code[0].selectionEnd = start + n;
     }
     function autoindent(el) {
       var curpos = el.selectionStart;
       var tabs = 0;
       while (curpos > 0) {
         curpos--;
-        if (el.value[curpos] == "\t") {
+        if (el.value[curpos] == '\t') {
           tabs++;
-        } else if (tabs > 0 || el.value[curpos] == "\n") {
+        } else if (tabs > 0 || el.value[curpos] == '\n') {
           break;
         }
       }
@@ -346,13 +361,13 @@
     function handleSaveShortcut(e) {
       if (e.isDefaultPrevented()) return false;
       if (!e.metaKey && !e.ctrlKey) return false;
-      if (e.key != "S" && e.key != "s") return false;
+      if (e.key != 'S' && e.key != 's') return false;
 
       e.preventDefault();
 
       // Share and save
       share(function(url) {
-        window.location.href = url + ".go?download=true";
+        window.location.href = url + '.go?download=true';
       });
 
       return true;
@@ -361,17 +376,22 @@
     function keyHandler(e) {
       if (opts.enableShortcuts && handleSaveShortcut(e)) return;
 
-      if (e.keyCode == 9 && !e.ctrlKey) { // tab (but not ctrl-tab)
+      if (e.keyCode == 9 && !e.ctrlKey) {
+        // tab (but not ctrl-tab)
         insertTabs(1);
         e.preventDefault();
         return false;
       }
-      if (e.keyCode == 13) { // enter
-        if (e.shiftKey) { // +shift
+      if (e.keyCode == 13) {
+        // enter
+        if (e.shiftKey) {
+          // +shift
           run();
           e.preventDefault();
           return false;
-        } if (e.ctrlKey) { // +control
+        }
+        if (e.ctrlKey) {
+          // +control
           fmt();
           e.preventDefault();
         } else {
@@ -391,17 +411,20 @@
       $(opts.codeEl).val(text);
     }
     function origin(href) {
-      return (""+href).split("/").slice(0, 3).join("/");
+      return ('' + href)
+        .split('/')
+        .slice(0, 3)
+        .join('/');
     }
 
-    var pushedEmpty = (window.location.pathname == "/");
+    var pushedEmpty = window.location.pathname == '/';
     function inputChanged() {
       if (pushedEmpty) {
         return;
       }
       pushedEmpty = true;
       $(opts.shareURLEl).hide();
-      window.history.pushState(null, "", "/");
+      window.history.pushState(null, '', '/');
     }
     function popState(e) {
       if (e === null) {
@@ -412,7 +435,12 @@
       }
     }
     var rewriteHistory = false;
-    if (window.history && window.history.pushState && window.addEventListener && opts.enableHistory) {
+    if (
+      window.history &&
+      window.history.pushState &&
+      window.addEventListener &&
+      opts.enableHistory
+    ) {
       rewriteHistory = true;
       code[0].addEventListener('input', inputChanged);
       window.addEventListener('popstate', popState);
@@ -422,36 +450,42 @@
       if (running) running.Kill();
       lineClear();
       lineHighlight(error);
-      output.empty().addClass("error").text(error);
+      output
+        .empty()
+        .addClass('error')
+        .text(error);
     }
     function loading() {
       lineClear();
       if (running) running.Kill();
-      output.removeClass("error").text('Waiting for remote server...');
+      output.removeClass('error').text('Waiting for remote server...');
     }
     function run() {
       loading();
-      running = transport.Run(body(), highlightOutput(PlaygroundOutput(output[0])));
+      running = transport.Run(
+        body(),
+        highlightOutput(PlaygroundOutput(output[0]))
+      );
     }
 
     function fmt() {
       loading();
-      var data = {"body": body()};
-      if ($(opts.fmtImportEl).is(":checked")) {
-        data["imports"] = "true";
+      var data = { body: body() };
+      if ($(opts.fmtImportEl).is(':checked')) {
+        data['imports'] = 'true';
       }
-      $.ajax("/fmt", {
+      $.ajax('/fmt', {
         data: data,
-        type: "POST",
-        dataType: "json",
+        type: 'POST',
+        dataType: 'json',
         success: function(data) {
           if (data.Error) {
             setError(data.Error);
           } else {
             setBody(data.Body);
-            setError("");
+            setError('');
           }
-        }
+        },
       });
     }
 
@@ -465,21 +499,21 @@
       sharing = true;
 
       var sharingData = body();
-      $.ajax("/share", {
+      $.ajax('/share', {
         processData: false,
         data: sharingData,
-        type: "POST",
-        contentType: "text/plain; charset=utf-8",
+        type: 'POST',
+        contentType: 'text/plain; charset=utf-8',
         complete: function(xhr) {
           sharing = false;
           if (xhr.status != 200) {
-            alert("Server error; try again.");
+            alert('Server error; try again.');
             return;
           }
           if (opts.shareRedirect) {
             window.location = opts.shareRedirect + xhr.responseText;
           }
-          var path = "/p/" + xhr.responseText;
+          var path = '/p/' + xhr.responseText;
           var url = origin(window.location) + path;
 
           for (var i = 0; i < shareCallbacks.length; i++) {
@@ -488,22 +522,29 @@
           shareCallbacks = [];
 
           if (shareURL) {
-            shareURL.show().val(url).focus().select();
+            shareURL
+              .show()
+              .val(url)
+              .focus()
+              .select();
 
             if (rewriteHistory) {
-              var historyData = {"code": sharingData};
-              window.history.pushState(historyData, "", path);
+              var historyData = { code: sharingData };
+              window.history.pushState(historyData, '', path);
               pushedEmpty = false;
             }
           }
-        }
+        },
       });
     }
 
     $(opts.runEl).click(run);
     $(opts.fmtEl).click(fmt);
 
-    if (opts.shareEl !== null && (opts.shareURLEl !== null || opts.shareRedirect !== null)) {
+    if (
+      opts.shareEl !== null &&
+      (opts.shareURLEl !== null || opts.shareRedirect !== null)
+    ) {
       if (opts.shareURLEl) {
         shareURL = $(opts.shareURLEl).hide();
       }
@@ -515,16 +556,16 @@
     if (opts.toysEl !== null) {
       $(opts.toysEl).bind('change', function() {
         var toy = $(this).val();
-        $.ajax("/doc/play/"+toy, {
+        $.ajax('/doc/play/' + toy, {
           processData: false,
-          type: "GET",
+          type: 'GET',
           complete: function(xhr) {
             if (xhr.status != 200) {
-              alert("Server error; try again.");
+              alert('Server error; try again.');
               return;
             }
             setBody(xhr.responseText);
-          }
+          },
         });
       });
     }
diff --git a/content/static/static.go b/content/static/static.go
index 235525f..d3bb43f 100644
--- a/content/static/static.go
+++ b/content/static/static.go
@@ -73,7 +73,7 @@
 
 	"godoc.html": "<!DOCTYPE\x20html>\x0a<html\x20lang=\"en\">\x0a<meta\x20charset=\"utf-8\">\x0a<meta\x20name=\"description\"\x20content=\"Go\x20is\x20an\x20open\x20source\x20programming\x20language\x20that\x20makes\x20it\x20easy\x20to\x20build\x20simple,\x20reliable,\x20and\x20efficient\x20software.\">\x0a<meta\x20name=\"viewport\"\x20content=\"width=device-width,\x20initial-scale=1\">\x0a<meta\x20name=\"theme-color\"\x20content=\"#00ADD8\">\x0a{{with\x20.Tabtitle}}\x0a\x20\x20<title>{{html\x20.}}\x20-\x20The\x20Go\x20Programming\x20Language</title>\x0a{{else}}\x0a\x20\x20<title>The\x20Go\x20Programming\x20Language</title>\x0a{{end}}\x0a<link\x20href=\"https://fonts.googleapis.com/css?family=Work+Sans:600|Roboto:400,700\"\x20rel=\"stylesheet\">\x0a<link\x20href=\"https://fonts.googleapis.com/css?family=Product+Sans&text=Supported%20by%20Google&display=swap\"\x20rel=\"stylesheet\">\x0a<link\x20type=\"text/css\"\x20rel=\"stylesheet\"\x20href=\"/lib/godoc/style.css\">\x0a{{if\x20.SearchBox}}\x0a<link\x20rel=\"search\"\x20type=\"application/opensearchdescription+xml\"\x20title=\"godoc\"\x20href=\"/opensearch.xml\"\x20/>\x0a{{end}}\x0a<script>window.initFuncs\x20=\x20[];</script>\x0a{{with\x20.GoogleAnalytics}}\x0a<script>\x0avar\x20_gaq\x20=\x20_gaq\x20||\x20[];\x0a_gaq.push([\"_setAccount\",\x20\"{{.}}\"]);\x0awindow.trackPageview\x20=\x20function()\x20{\x0a\x20\x20_gaq.push([\"_trackPageview\",\x20location.pathname+location.hash]);\x0a};\x0awindow.trackPageview();\x0awindow.trackEvent\x20=\x20function(category,\x20action,\x20opt_label,\x20opt_value,\x20opt_noninteraction)\x20{\x0a\x20\x20_gaq.push([\"_trackEvent\",\x20category,\x20action,\x20opt_label,\x20opt_value,\x20opt_noninteraction]);\x0a};\x0a</script>\x0a{{end}}\x0a<script\x20src=\"/lib/godoc/jquery.js\"\x20defer></script>\x0a\x0a{{if\x20.Playground}}\x0a<script\x20src=\"/lib/godoc/playground.js\"\x20defer></script>\x0a{{end}}\x0a{{with\x20.Version}}<script>var\x20goVersion\x20=\x20{{printf\x20\"%q\"\x20.}};</script>{{end}}\x0a<script\x20src=\"/lib/godoc/godocs.js\"\x20defer></script>\x0a\x0a<body\x20class=\"Site\">\x0a<header\x20class=\"Header\x20js-header\">\x0a\x20\x20<nav\x20class=\"Header-nav\x20{{if\x20.Title}}Header-nav--wide{{end}}\">\x0a\x20\x20\x20\x20<a\x20href=\"/\"><img\x20class=\"Header-logo\"\x20src=\"/lib/godoc/images/go-logo-blue.svg\"\x20alt=\"Go\"></a>\x0a\x20\x20\x20\x20<button\x20class=\"Header-menuButton\x20js-headerMenuButton\"\x20aria-label=\"Main\x20menu\"\x20aria-expanded=\"false\">\x0a\x20\x20\x20\x20\x20\x20<div\x20class=\"Header-menuButtonInner\"></div>\x0a\x20\x20\x20\x20</button>\x0a\x20\x20\x20\x20<ul\x20class=\"Header-menu\">\x0a\x20\x20\x20\x20\x20\x20<li\x20class=\"Header-menuItem\"><a\x20href=\"/doc/\">Documents</a></li>\x0a\x20\x20\x20\x20\x20\x20<li\x20class=\"Header-menuItem\"><a\x20href=\"/pkg/\">Packages</a></li>\x0a\x20\x20\x20\x20\x20\x20<li\x20class=\"Header-menuItem\"><a\x20href=\"/project/\">The\x20Project</a></li>\x0a\x20\x20\x20\x20\x20\x20<li\x20class=\"Header-menuItem\"><a\x20href=\"/help/\">Help</a></li>\x0a\x20\x20\x20\x20\x20\x20{{if\x20not\x20.GoogleCN}}\x0a\x20\x20\x20\x20\x20\x20\x20\x20<li\x20class=\"Header-menuItem\"><a\x20href=\"/blog/\">Blog</a></li>\x0a\x20\x20\x20\x20\x20\x20\x20\x20{{if\x20.Playground}}\x0a\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20<li\x20class=\"Header-menuItem\"><a\x20href=\"https://play.golang.org/\">Play</a></li>\x0a\x20\x20\x20\x20\x20\x20\x20\x20{{end}}\x0a\x20\x20\x20\x20\x20\x20{{end}}\x0a\x20\x20\x20\x20\x20\x20<li\x20class=\"Header-menuItem\x20Header-menuItem--search\">\x0a\x20\x20\x20\x20\x20\x20\x20\x20<form\x20class=\"HeaderSearch\"\x20role=\"search\"\x20action=\"/search\">\x0a\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20<input\x20class=\"HeaderSearch-input\"\x0a\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20type=\"search\"\x0a\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20name=\"q\"\x0a\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20placeholder=\"Search\"\x0a\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20aria-label=\"Search\"\x0a\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20autocapitalize=\"off\"\x0a\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20autocomplete=\"off\"\x0a\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20autocorrect=\"off\"\x0a\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20spellcheck=\"false\"\x0a\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20required>\x0a\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20<button\x20class=\"HeaderSearch-submit\">\x0a\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20<!--\x20magnifying\x20glass:\x20--><svg\x20class=\"HeaderSearch-icon\"\x20width=\"24\"\x20height=\"24\"\x20viewBox=\"0\x200\x2024\x2024\"><title>Search</title><path\x20d=\"M15.5\x2014h-.79l-.28-.27C15.41\x2012.59\x2016\x2011.11\x2016\x209.5\x2016\x205.91\x2013.09\x203\x209.5\x203S3\x205.91\x203\x209.5\x205.91\x2016\x209.5\x2016c1.61\x200\x2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
-	"godocs.js": "//\x20Copyright\x202012\x20The\x20Go\x20Authors.\x20All\x20rights\x20reserved.\x0a//\x20Use\x20of\x20this\x20source\x20code\x20is\x20governed\x20by\x20a\x20BSD-style\x0a//\x20license\x20that\x20can\x20be\x20found\x20in\x20the\x20LICENSE\x20file.\x0a\x0a/*\x20A\x20little\x20code\x20to\x20ease\x20navigation\x20of\x20these\x20documents.\x0a\x20*\x0a\x20*\x20On\x20window\x20load\x20we:\x0a\x20*\x20\x20+\x20Generate\x20a\x20table\x20of\x20contents\x20(generateTOC)\x0a\x20*\x20\x20+\x20Bind\x20foldable\x20sections\x20(bindToggles)\x0a\x20*\x20\x20+\x20Bind\x20links\x20to\x20foldable\x20sections\x20(bindToggleLinks)\x0a\x20*/\x0a\x0a(function()\x20{\x0a'use\x20strict';\x0a\x0avar\x20headerEl\x20=\x20document.querySelector('.js-header');\x0avar\x20menuButtonEl\x20=\x20document.querySelector('.js-headerMenuButton');\x0amenuButtonEl.addEventListener('click',\x20function(e)\x20{\x0a\x20\x20e.preventDefault();\x0a\x20\x20headerEl.classList.toggle('is-active');\x0a\x20\x20menuButtonEl.setAttribute('aria-expanded',\x20headerEl.classList.contains('is-active'));\x0a});\x0a\x0a/*\x20Generates\x20a\x20table\x20of\x20contents:\x20looks\x20for\x20h2\x20and\x20h3\x20elements\x20and\x20generates\x0a\x20*\x20links.\x20\"Decorates\"\x20the\x20element\x20with\x20id==\"nav\"\x20with\x20this\x20table\x20of\x20contents.\x0a\x20*/\x0afunction\x20generateTOC()\x20{\x0a\x20\x20if\x20($('#manual-nav').length\x20>\x200)\x20{\x0a\x20\x20\x20\x20return;\x0a\x20\x20}\x0a\x0a\x20\x20//\x20For\x20search,\x20we\x20send\x20the\x20toc\x20precomputed\x20from\x20server-side.\x0a\x20\x20//\x20TODO:\x20Ideally,\x20this\x20should\x20always\x20be\x20precomputed\x20for\x20all\x20pages,\x20but\x20then\x0a\x20\x20//\x20we\x20need\x20to\x20do\x20HTML\x20parsing\x20on\x20the\x20server-side.\x0a\x20\x20if\x20(location.pathname\x20===\x20'/search')\x20{\x0a\x20\x20\x20\x20return;\x0a\x20\x20}\x0a\x0a\x20\x20var\x20nav\x20=\x20$('#nav');\x0a\x20\x20if\x20(nav.length\x20===\x200)\x20{\x0a\x20\x20\x20\x20return;\x0a\x20\x20}\x0a\x0a\x20\x20var\x20toc_items\x20=\x20[];\x0a\x20\x20$(nav).nextAll('h2,\x20h3').each(function()\x20{\x0a\x20\x20\x20\x20var\x20node\x20=\x20this;\x0a\x20\x20\x20\x20if\x20(node.id\x20==\x20'')\x0a\x20\x20\x20\x20\x20\x20node.id\x20=\x20'tmp_'\x20+\x20toc_items.length;\x0a\x20\x20\x20\x20var\x20link\x20=\x20$('<a/>').attr('href',\x20'#'\x20+\x20node.id).text($(node).text());\x0a\x20\x20\x20\x20var\x20item;\x0a\x20\x20\x20\x20if\x20($(node).is('h2'))\x20{\x0a\x20\x20\x20\x20\x20\x20item\x20=\x20$('<dt/>');\x0a\x20\x20\x20\x20}\x20else\x20{\x20//\x20h3\x0a\x20\x20\x20\x20\x20\x20item\x20=\x20$('<dd\x20class=\"indent\"/>');\x0a\x20\x20\x20\x20}\x0a\x20\x20\x20\x20item.append(link);\x0a\x20\x20\x20\x20toc_items.push(item);\x0a\x20\x20});\x0a\x20\x20if\x20(toc_items.length\x20<=\x201)\x20{\x0a\x20\x20\x20\x20return;\x0a\x20\x20}\x0a\x20\x20var\x20dl1\x20=\x20$('<dl/>');\x0a\x20\x20var\x20dl2\x20=\x20$('<dl/>');\x0a\x0a\x20\x20var\x20split_index\x20=\x20(toc_items.length\x20/\x202)\x20+\x201;\x0a\x20\x20if\x20(split_index\x20<\x208)\x20{\x0a\x20\x20\x20\x20split_index\x20=\x20toc_items.length;\x0a\x20\x20}\x0a\x20\x20for\x20(var\x20i\x20=\x200;\x20i\x20<\x20split_index;\x20i++)\x20{\x0a\x20\x20\x20\x20dl1.append(toc_items[i]);\x0a\x20\x20}\x0a\x20\x20for\x20(/*\x20keep\x20using\x20i\x20*/;\x20i\x20<\x20toc_items.length;\x20i++)\x20{\x0a\x20\x20\x20\x20dl2.append(toc_items[i]);\x0a\x20\x20}\x0a\x0a\x20\x20var\x20tocTable\x20=\x20$('<table\x20class=\"unruled\"/>').appendTo(nav);\x0a\x20\x20var\x20tocBody\x20=\x20$('<tbody/>').appendTo(tocTable);\x0a\x20\x20var\x20tocRow\x20=\x20$('<tr/>').appendTo(tocBody);\x0a\x0a\x20\x20//\x201st\x20column\x0a\x20\x20$('<td\x20class=\"first\"/>').appendTo(tocRow).append(dl1);\x0a\x20\x20//\x202nd\x20column\x0a\x20\x20$('<td/>').appendTo(tocRow).append(dl2);\x0a}\x0a\x0afunction\x20bindToggle(el)\x20{\x0a\x20\x20$('.toggleButton',\x20el).click(function()\x20{\x0a\x20\x20\x20\x20if\x20($(this).closest(\".toggle,\x20.toggleVisible\")[0]\x20!=\x20el)\x20{\x0a\x20\x20\x20\x20\x20\x20//\x20Only\x20trigger\x20the\x20closest\x20toggle\x20header.\x0a\x20\x20\x20\x20\x20\x20return;\x0a\x20\x20\x20\x20}\x0a\x0a\x20\x20\x20\x20if\x20($(el).is('.toggle'))\x20{\x0a\x20\x20\x20\x20\x20\x20$(el).addClass('toggleVisible').removeClass('toggle');\x0a\x20\x20\x20\x20}\x20else\x20{\x0a\x20\x20\x20\x20\x20\x20$(el).addClass('toggle').removeClass('toggleVisible');\x0a\x20\x20\x20\x20}\x0a\x20\x20});\x0a}\x0a\x0afunction\x20bindToggles(selector)\x20{\x0a\x20\x20$(selector).each(function(i,\x20el)\x20{\x0a\x20\x20\x20\x20bindToggle(el);\x0a\x20\x20});\x0a}\x0a\x0afunction\x20bindToggleLink(el,\x20prefix)\x20{\x0a\x20\x20$(el).click(function()\x20{\x0a\x20\x20\x20\x20var\x20href\x20=\x20$(el).attr('href');\x0a\x20\x20\x20\x20var\x20i\x20=\x20href.indexOf('#'+prefix);\x0a\x20\x20\x20\x20if\x20(i\x20<\x200)\x20{\x0a\x20\x20\x20\x20\x20\x20return;\x0a\x20\x20\x20\x20}\x0a\x20\x20\x20\x20var\x20id\x20=\x20'#'\x20+\x20prefix\x20+\x20href.slic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+	"play.js": 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"<!--{\x0a\x20\x20\"Title\":\x20\"Go\x20Modules\x20Reference\",\x0a\x20\x20\"Subtitle\":\x20\"Version\x20of\x20Feb\x205,\x202019\",\x0a\x20\x20\"Path\":\x20\"/ref/mod\"\x0a}-->\x0a<!--\x20TODO(jayconrod):\x20change\x20anchors\x20to\x20header\x20id\x20attributes\x20either\x20during\x0amarkdown\x20rendering\x20or\x20as\x20HTML\x20postprocessing\x20step.\x20-->\x0a<!--\x20TODO(jayconrod):\x20use\x20<dfn>\x20tags\x20where\x20meaningful.\x0aCurrently,\x20*term*\x20is\x20used\x20instead,\x20which\x20renders\x20to\x20<em>term</em>.\x20-->\x0a<p><a\x20id=\"introduction\"></a></p>\x0a<h2>Introduction</h2>\x0a<p><a\x20id=\"modules-overview\"></a></p>\x0a<h2>Modules,\x20packages,\x20and\x20versions</h2>\x0a<p>A\x20<a\x20href=\"#glos-module\"><em>module</em></a>\x20is\x20a\x20collection\x20of\x20packages\x20that\x20are\x20released,\x0aversioned,\x20and\x20distributed\x20together.\x20A\x20module\x20is\x20identified\x20by\x20a\x20<a\x20href=\"#glos-module-path\"><em>module\x0apath</em></a>,\x20which\x20is\x20declared\x20in\x20a\x20<a\x20href=\"#go.mod-files\"><code>go.mod</code>\x0afile</a>,\x20together\x20with\x20information\x20about\x20the\x20module's\x0adependencies.\x20The\x20<a\x20href=\"#glos-module-root-directory\"><em>module\x20root\x20directory</em></a>\x20is\x20the\x0adirectory\x20that\x20contains\x20the\x20<code>go.mod</code>\x20file.\x20The\x20<a\x20href=\"#glos-main-module\"><em>main\x0amodule</em></a>\x20is\x20the\x20module\x20containing\x20the\x20directory\x20where\x20the\x0a<code>go</code>\x20command\x20is\x20invoked.</p>\x0a<p>Each\x20<a\x20href=\"#glos-package\"><em>package</em></a>\x20within\x20a\x20module\x20is\x20a\x20collection\x20of\x20source\x20files\x0ain\x20the\x20same\x20directory\x20that\x20are\x20compiled\x20together.\x20A\x20<a\x20href=\"#glos-package-path\"><em>package\x0apath</em></a>\x20is\x20the\x20module\x20path\x20joined\x20with\x20the\x20subdirectory\x0acontaining\x20the\x20package\x20(relative\x20to\x20the\x20module\x20root).\x20For\x20example,\x20the\x20module\x0a<code>&quot;golang.org/x/net&quot;</code>\x20contains\x20a\x20package\x20in\x20the\x20directory\x20<code>&quot;html&quot;</code>.\x20That\x0apackage's\x20path\x20is\x20<code>&quot;golang.org/x/net/html&quot;</code>.</p>\x0a<p><a\x20id=\"module-path\"></a></p>\x0a<h3>Module\x20paths</h3>\x0a<p>A\x20<a\x20href=\"#glos-module-path\"><em>module\x20path</em></a>\x20is\x20the\x20canonical\x20name\x20for\x20a\x20module,\x0adeclared\x20with\x20the\x20<a\x20href=\"#go.mod-module\"><code>module</code>\x20directive</a>\x20in\x20the\x20module's\x0a<a\x20href=\"#glos-go.mod-file\"><code>go.mod</code>\x20file</a>.\x20A\x20module's\x20path\x20is\x20the\x20prefix\x20for\x20package\x0apaths\x20within\x20the\x20module.</p>\x0a<p>A\x20module\x20path\x20should\x20describe\x20both\x20what\x20the\x20module\x20does\x20and\x20where\x20to\x20find\x20it.\x0aTypically,\x20a\x20module\x20path\x20consists\x20of\x20a\x20repository\x20root\x20path,\x20a\x20subdirectory\x0awithin\x20the\x20repository\x20(usually\x20empty),\x20and\x20a\x20major\x20version\x20suffix\x20(for\x20major\x0aversion\x202\x20or\x20higher).</p>\x0a<ul>\x0a<li>The\x20repository\x20root\x20path\x20is\x20part\x20of\x20a\x20URL\x20that\x20corresponds\x20to\x20a\x20version\x0acontrol\x20repository.\x20For\x20example,\x20<code>golang.org/x/net</code>.\x20See\x20<a\x20href=\"#custom-import-paths\">Custom\x20import\x0apaths</a>\x20for\x20details\x20on\x20how\x20paths\x20are\x20resolved\x20to\x0arepositories.</li>\x0a<li>If\x20the\x20module\x20is\x20in\x20a\x20subdirectory\x20of\x20the\x20version\x20control\x20repository,\x20the\x0asubdirectory\x20should\x20be\x20part\x20of\x20the\x20module\x20path\x20(but\x20not\x20the\x20repository\x20root\x0apath).\x20For\x20example,\x20the\x20module\x20<code>golang.org/x/tools/gopls</code>\x20is\x20in\x20the\x20<code>/gopls</code>\x0asubdirectory\x20of\x20the\x20repository\x20<code>golang.org/x/tools</code>.</li>\x0a<li>If\x20the\x20module\x20is\x20released\x20at\x20major\x20version\x202\x20or\x20higher,\x20the\x20module\x20path\x20must\x0aend\x20with\x20a\x20<a\x20href=\"#major-version-suffixes\">major\x20version\x20suffix</a>\x20like\x0a<code>/v2</code>.\x20This\x20may\x20or\x20may\x20not\x20be\x20part\x20of\x20the\x20subdirectory\x20name.\x20For\x20example,\x20the\x0amodule\x20with\x20path\x20<code>golang.org/x/repo/sub/v2</code>\x20could\x20be\x20in\x20the\x20<code>/sub</code>\x20or\x0a<code>/sub/v2</code>\x20subdirectory\x20of\x20the\x20repository\x20<code>golang.org/x/repo</code>.</li>\x0a</ul>\x0a<p>If\x20a\x20module\x20might\x20be\x20depended\x20on\x20by\x20other\x20modules,\x20these\x20rules\x20must\x20be\x20followed\x0aso\x20that\x20the\x20<code>go</code>\x20command\x20can\x20find\x20and\x20download\x20the\x20module.\x20There\x20are\x20also\x0aseveral\x20<a\x20href=\"#go.mod-ident\">lexical\x20restrictions</a>\x20on\x20characters\x20allowed\x20in\x0amodule\x20paths.</p>\x0a<p><a\x20id=\"versions\"></a></p>\x0a<h3>Versions</h3>\x0a<p>A\x20<a\x20href=\"#glos-version\"><em>version</em></a>\x20identifies\x20an\x20immutable\x20snapshot\x20of\x20a\x20module,\x20which\x0amay\x20be\x20either\x20a\x20<a\x20href=\"#glos-release-version\">release</a>\x20or\x20a\x0a<a\x20href=\"#glos-pre-release-version\">pre-release</a>.\x20Each\x20version\x20starts\x20with\x20the\x20letter\x0a<code>v</code>,\x20followed\x20by\x20a\x20semantic\x20version.\x20See\x20<a\x20href=\"https://semver.org/spec/v2.0.0.html\">Semantic\x20Versioning\x0a2.0.0</a>\x20for\x20details\x20on\x20how\x20versions\x20are\x0aformatted,\x20interpreted,\x20and\x20compared.</p>\x0a<p>To\x20summarize,\x20a\x20semantic\x20version\x20consists\x20of\x20three\x20non-negative\x20integers\x20(the\x0amajor,\x20minor,\x20and\x20patch\x20versions,\x20from\x20left\x20to\x20right)\x20separated\x20by\x20dots.\x20The\x0apatch\x20version\x20may\x20be\x20followed\x20by\x20an\x20optional\x20pre-release\x20string\x20starting\x20with\x20a\x0ahyphen.\x20The\x20pre-release\x20string\x20or\x20patch\x20version\x20may\x20be\x20followed\x20by\x20a\x20build\x0ametadata\x20string\x20starting\x20with\x20a\x20plus.\x20For\x20example,\x20<code>v0.0.0</code>,\x20<code>v1.12.134</code>,\x0a<code>v8.0.5-pre</code>,\x20and\x20<code>v2.0.9+meta</code>\x20are\x20valid\x20versions.</p>\x0a<p>Each\x20part\x20of\x20a\x20version\x20indicates\x20whether\x20the\x20version\x20is\x20stable\x20and\x20whether\x20it\x20is\x0acompatible\x20with\x20previous\x20versions.</p>\x0a<ul>\x0a<li>The\x20<a\x20href=\"#glos-major-version\">major\x20version</a>\x20must\x20be\x20incremented\x20and\x20the\x20minor\x0aand\x20patch\x20versions\x20must\x20be\x20set\x20to\x20zero\x20after\x20a\x20backwards\x20incompatible\x20change\x0ais\x20made\x20to\x20the\x20module's\x20public\x20interface\x20or\x20documented\x20functionality,\x20for\x0aexample,\x20after\x20a\x20package\x20is\x20removed.</li>\x0a<li>The\x20<a\x20href=\"#glos-minor-version\">minor\x20version</a>\x20must\x20be\x20incremented\x20and\x20the\x20patch\x0aversion\x20set\x20to\x20zero\x20after\x20a\x20backwards\x20compatible\x20change,\x20for\x20example,\x20after\x20a\x0anew\x20function\x20is\x20added.</li>\x0a<li>The\x20<a\x20href=\"#glos-patch-version\">patch\x20version</a>\x20must\x20be\x20incremented\x20after\x20a\x20change\x0athat\x20does\x20not\x20affect\x20the\x20module's\x20public\x20interface,\x20such\x20as\x20a\x20bug\x20fix\x20or\x0aoptimization.</li>\x0a<li>The\x20pre-release\x20suffix\x20indicates\x20a\x20version\x20is\x20a\x0a<a\x20href=\"#glos-pre-release-version\">pre-release</a>.\x20Pre-release\x20versions\x20sort\x20before\x0athe\x20corresponding\x20release\x20versions.\x20For\x20example,\x20<code>v1.2.3-pre</code>\x20comes\x20before\x0a<code>v1.2.3</code>.</li>\x0a<li>The\x20build\x20metadata\x20suffix\x20is\x20ignored\x20for\x20the\x20purpose\x20of\x20comparing\x20versions.\x0aTags\x20with\x20build\x20metadata\x20are\x20ignored\x20in\x20version\x20control\x20repositories,\x20but\x0abuild\x20metadata\x20is\x20preserved\x20in\x20versions\x20specified\x20in\x20<code>go.mod</code>\x20files.\x20The\x0asuffix\x20<code>+incompatible</code>\x20denotes\x20a\x20version\x20released\x20before\x20migrating\x20to\x20modules\x0aversion\x20major\x20version\x202\x20or\x20later\x20(see\x20<a\x20href=\"#non-module-compat\">Compatibility\x20with\x20non-module\x0arepositories</a>.</li>\x0a</ul>\x0a<p>A\x20version\x20is\x20considered\x20unstable\x20if\x20its\x20major\x20version\x20is\x200\x20or\x20it\x20has\x20a\x0apre-release\x20suffix.\x20Unstable\x20versions\x20are\x20not\x20subject\x20to\x20compatibility\x0arequirements.\x20For\x20example,\x20<code>v0.2.0</code>\x20may\x20not\x20be\x20compatible\x20with\x20<code>v0.1.0</code>,\x20and\x0a<code>v1.5.0-beta</code>\x20may\x20not\x20be\x20compatible\x20with\x20<code>v1.5.0</code>.</p>\x0a<p>Go\x20may\x20access\x20modules\x20in\x20version\x20control\x20systems\x20using\x20tags,\x20branches,\x20or\x0arevisions\x20that\x20don't\x20follow\x20these\x20conventions.\x20However,\x20within\x20the\x20main\x20module,\x0athe\x20<code>go</code>\x20command\x20will\x20automatically\x20convert\x20revision\x20names\x20that\x20don't\x20follow\x0athis\x20standard\x20into\x20canonical\x20versions.\x20The\x20<code>go</code>\x20command\x20will\x20also\x20remove\x20build\x0ametadata\x20suffixes\x20(except\x20for\x20<code>+incompatible</code>)\x20as\x20part\x20of\x20this\x20process.\x20This\x20may\x0aresult\x20in\x20a\x20<a\x20href=\"#glos-pseudo-version\"><em>pseudo-version</em></a>,\x20a\x20pre-release\x20version\x20that\x0aencodes\x20a\x20revision\x20identifier\x20(such\x20as\x20a\x20Git\x20commit\x20hash)\x20and\x20a\x20timestamp\x20from\x20a\x0aversion\x20control\x20system.\x20For\x20example,\x20the\x20command\x20<code>go\x20get\x20-d\x20golang.org/x/net@daa7c041</code>\x20will\x20convert\x20the\x20commit\x20hash\x20<code>daa7c041</code>\x20into\x20the\x0apseudo-version\x20<code>v0.0.0-20191109021931-daa7c04131f5</code>.\x20Canonical\x20versions\x20are\x0arequired\x20outsi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x0a<code>replace</code>,\x20and\x20<code>exclude</code>\x20directives),\x20the\x20final\x20path\x20element\x20must\x20be\x20consistent\x0awith\x20the\x20version.\x20See\x20<a\x20href=\"#major-version-suffixes\">Major\x20version\x20suffixes</a>.</p>\x0a<p><a\x20id=\"go.mod-grammar\"></a></p>\x0a<h3>Grammar</h3>\x0a<p><code>go.mod</code>\x20syntax\x20is\x20specified\x20below\x20using\x20Extended\x20Backus-Naur\x20Form\x20(EBNF).\x0aSee\x20the\x20<a\x20href=\"/ref/spec#Notation\">Notation\x20section\x20in\x20the\x20Go\x20Language\x20Specificiation</a>\x0afor\x20details\x20on\x20EBNF\x20syntax.</p>\x0a<pre><code>GoMod\x20=\x20{\x20Directive\x20}\x20.\x0aDirective\x20=\x20ModuleDirective\x20|\x0a\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20GoDirective\x20|\x0a\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20RequireDirective\x20|\x0a\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20ExcludeDirective\x20|\x0a\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20ReplaceDirective\x20.\x0a</code></pre>\x0a<p>Newlines,\x20identifiers,\x20and\x20strings\x20are\x20denoted\x20with\x20<code>newline</code>,\x20<code>ident</code>,\x20and\x0a<code>string</code>,\x20respectively.</p>\x0a<p>Module\x20paths\x20and\x20versions\x20are\x20denoted\x20with\x20<code>ModulePath</code>\x20and\x20<code>Version</code>.</p>\x0a<pre><code>ModulePath\x20=\x20ident\x20|\x20string\x20.\x20/*\x20see\x20restrictions\x20above\x20*/\x0aVersion\x20=\x20ident\x20|\x20string\x20.\x20\x20\x20\x20/*\x20see\x20restrictions\x20above\x20*/\x0a</code></pre>\x0a<p><a\x20id=\"go.mod-module\"></a></p>\x0a<h3><code>module</code>\x20directive</h3>\x0a<p>A\x20<code>module</code>\x20directive\x20defines\x20the\x20main\x20module's\x20<a\x20href=\"#glos-module-path\">path</a>.\x20A\x0a<code>go.mod</code>\x20file\x20must\x20contain\x20exactly\x20one\x20<code>module</code>\x20directive.</p>\x0a<pre><code>ModuleDirective\x20=\x20&quot;module&quot;\x20(\x20ModulePath\x20|\x20&quot;(&quot;\x20newline\x20ModulePath\x20newline\x20&quot;)&quot;\x20newline\x20.\x0a</code></pre>\x0a<p>Example:</p>\x0a<pre><code>module\x20golang.org/x/net\x0a</code></pre>\x0a<p><a\x20id=\"go.mod-go\"></a></p>\x0a<h3><code>go</code>\x20directive</h3>\x0a<p>A\x20<code>go</code>\x20directive\x20sets\x20the\x20expected\x20language\x20version\x20for\x20the\x20module.\x20The\x0aversion\x20must\x20be\x20a\x20valid\x20Go\x20release\x20version:\x20a\x20positive\x20integer\x20followed\x20by\x20a\x20dot\x0aand\x20a\x20non-negative\x20integer\x20(for\x20example,\x20<code>1.9</code>,\x20<code>1.14</code>).</p>\x0a<p>The\x20language\x20version\x20determines\x20which\x20language\x20features\x20are\x20available\x20when\x0acompiling\x20packages\x20in\x20the\x20module.\x20Language\x20features\x20present\x20in\x20that\x20version\x0awill\x20be\x20available\x20for\x20use.\x20Language\x20features\x20removed\x20in\x20earlier\x20versions,\x0aor\x20added\x20in\x20later\x20versions,\x20will\x20not\x20be\x20available.\x20The\x20language\x20version\x20does\x20not\x0aaffect\x20build\x20tags,\x20which\x20are\x20determined\x20by\x20the\x20Go\x20release\x20being\x20used.</p>\x0a<p>The\x20language\x20version\x20is\x20also\x20used\x20to\x20enable\x20features\x20in\x20the\x20<code>go</code>\x20command.\x20For\x0aexample,\x20automatic\x20<a\x20href=\"#vendoring\">vendoring</a>\x20may\x20be\x20enabled\x20with\x20a\x20<code>go</code>\x20version\x20of\x0a<code>1.14</code>\x20or\x20higher.</p>\x0a<p>A\x20<code>go.mod</code>\x20file\x20may\x20contain\x20at\x20most\x20one\x20<code>go</code>\x20directive.\x20Most\x20commands\x20will\x20add\x20a\x0a<code>go</code>\x20directive\x20with\x20the\x20current\x20Go\x20version\x20if\x20one\x20is\x20not\x20present.</p>\x0a<pre><code>GoDirective\x20=\x20&quot;go&quot;\x20GoVersion\x20newline\x20.\x0aGoVersion\x20=\x20string\x20|\x20ident\x20.\x20\x20/*\x20valid\x20release\x20version;\x20see\x20above\x20*/\x0a</code></pre>\x0a<p>Example:</p>\x0a<pre><code>go\x201.14\x0a</code></pre>\x0a<p><a\x20id=\"go.mod-require\"></a></p>\x0a<h3><code>require</code>\x20directive</h3>\x0a<p>A\x20<code>require</code>\x20directive\x20declares\x20a\x20minimum\x20required\x20version\x20of\x20a\x20given\x20module\x0adependency.\x20For\x20each\x20required\x20module\x20version,\x20the\x20<code>go</code>\x20command\x20loads\x20the\x0a<code>go.mod</code>\x20file\x20for\x20that\x20version\x20and\x20incorporates\x20the\x20requirements\x20from\x20that\x0afile.\x20Once\x20all\x20requirements\x20have\x20been\x20loaded,\x20the\x20<code>go</code>\x20command\x20resolves\x20them\x0ausing\x20<a\x20href=\"#minimal-version-selection\">minimal\x20version\x20selection\x20(MVS)</a>\x20to\x20produce\x0athe\x20<a\x20href=\"#glos-build-list\">build\x20list</a>.</p>\x0a<p>The\x20<code>go</code>\x20command\x20automatically\x20adds\x20<code>//\x20indirect</code>\x20comments\x20for\x20some\x0arequirements.\x20An\x20<code>//\x20indirect</code>\x20comment\x20indicates\x20that\x20no\x20package\x20from\x20the\x0arequired\x20module\x20is\x20directly\x20imported\x20by\x20any\x20package\x20in\x20the\x20main\x20module.\x0aThe\x20<code>go</code>\x20command\x20adds\x20an\x20indirect\x20requirement\x20when\x20the\x20selected\x20version\x20of\x20a\x0amodule\x20is\x20higher\x20than\x20what\x20is\x20already\x20implied\x20(transitively)\x20by\x20the\x20main\x0amodule's\x20other\x20dependencies.\x20That\x20may\x20occur\x20because\x20of\x20an\x20explicit\x20upgrade\x0a(<code>go\x20get\x20-u</code>),\x20removal\x20of\x20some\x20other\x20dependency\x20that\x20previously\x20imposed\x20the\x0arequirement\x20(<code>go\x20mod\x20tidy</code>),\x20or\x20a\x20dependency\x20that\x20imports\x20a\x20package\x20without\x0aa\x20corresponding\x20requirement\x20in\x20its\x20own\x20<code>go.mod</code>\x20file\x20(such\x20as\x20a\x20dependency\x0athat\x20lacks\x20a\x20<code>go.mod</code>\x20file\x20altogether).</p>\x0a<pre><code>RequireDirective\x20=\x20&quot;require&quot;\x20(\x20RequireSpec\x20|\x20&quot;(&quot;\x20newline\x20{\x20RequireSpec\x20}\x20&quot;)&quot;\x20newline\x20)\x20.\x0aRequireSpec\x20=\x20ModulePath\x20Version\x20newline\x20.\x0a</code></pre>\x0a<p>Example:</p>\x0a<pre><code>require\x20golang.org/x/net\x20v1.2.3\x0a\x0arequire\x20(\x0a\x20\x20\x20\x20golang.org/x/crypto\x20v1.4.5\x20//\x20indirect\x0a\x20\x20\x20\x20golang.org/x/text\x20v1.6.7\x0a)\x0a</code></pre>\x0a<p><a\x20id=\"go.mod-exclude\"></a></p>\x0a<h3><code>exclude</code>\x20directive</h3>\x0a<p>An\x20<code>exclude</code>\x20directive\x20prevents\x20a\x20module\x20version\x20from\x20being\x20loaded\x20by\x20the\x20<code>go</code>\x0acommand.\x20If\x20an\x20excluded\x20version\x20is\x20referenced\x20by\x20a\x20<code>require</code>\x20directive\x20in\x20a\x0a<code>go.mod</code>\x20file,\x20the\x20<code>go</code>\x20command\x20will\x20list\x20available\x20versions\x20for\x20the\x20module\x20(as\x0ashown\x20with\x20<code>go\x20list\x20-m\x20-versions</code>)\x20and\x20will\x20load\x20the\x20next\x20higher\x20non-excluded\x0aversion\x20instead.\x20Both\x20release\x20and\x20pre-release\x20versions\x20are\x20considered\x20for\x20this\x0apurpose,\x20but\x20pseudo-versions\x20are\x20not.\x20If\x20there\x20are\x20no\x20higher\x20versions,\x0athe\x20<code>go</code>\x20command\x20will\x20report\x20an\x20error.\x20Note\x20that\x20this\x20<a\x20href=\"https://golang.org/issue/36465\">may\x0achange</a>\x20in\x20Go\x201.15.</p>\x0a<!--\x20TODO(golang.org/issue/36465):\x20update\x20after\x20change\x20-->\x0a<p><code>exclude</code>\x20directives\x20only\x20apply\x20in\x20the\x20main\x20module's\x20<code>go.mod</code>\x20file\x20and\x20are\x0aignored\x20in\x20other\x20modules.\x20See\x20<a\x20href=\"#minimal-version-selection\">Minimal\x20version\x0aselection</a>\x20for\x20details.</p>\x0a<pre><code>ExcludeDirective\x20=\x20&quot;exclude&quot;\x20(\x20ExcludeSpec\x20|\x20&quot;(&quot;\x20newline\x20{\x20ExcludeSpec\x20}\x20&quot;)&quot;\x20)\x20.\x0aExcludeSpec\x20=\x20ModulePath\x20Version\x20newline\x20.\x0a</code></pre>\x0a<p>Example:</p>\x0a<pre><code>exclude\x20golang.org/x/net\x20v1.2.3\x0a\x0aexclude\x20(\x0a\x20\x20\x20\x20golang.org/x/crypto\x20v1.4.5\x0a\x20\x20\x20\x20golang.org/x/text\x20v1.6.7\x0a)\x0a</code></pre>\x0a<p><a\x20id=\"go.mod-replace\"></a></p>\x0a<h3><code>replace</code>\x20directive</h3>\x0a<p>A\x20<code>replace</code>\x20directive\x20replaces\x20the\x20contents\x20of\x20a\x20specific\x20version\x20of\x20a\x20module,\x0aor\x20all\x20versions\x20of\x20a\x20module,\x20with\x20contents\x20found\x20elsewhere.\x20The\x20replacement\x0amay\x20be\x20specified\x20with\x20either\x20another\x20module\x20path\x20and\x20version,\x20or\x20a\x0aplatform-specific\x20file\x20path.</p>\x0a<p>If\x20a\x20version\x20is\x20present\x20on\x20the\x20left\x20side\x20of\x20the\x20arrow\x20(<code>=&gt;</code>),\x20only\x20that\x20specific\x0aversion\x20of\x20the\x20module\x20is\x20replaced;\x20other\x20versions\x20will\x20be\x20accessed\x20normally.\x0aIf\x20the\x20left\x20version\x20is\x20omitted,\x20all\x20versions\x20of\x20the\x20module\x20are\x20replaced.</p>\x0a<p>If\x20the\x20path\x20on\x20the\x20right\x20side\x20of\x20the\x20arrow\x20is\x20an\x20absolute\x20or\x20relative\x20path\x0a(beginning\x20with\x20<code>./</code>\x20or\x20<code>../</code>),\x20it\x20is\x20interpreted\x20as\x20the\x20local\x20file\x20path\x20to\x20the\x0areplacement\x20module\x20root\x20directory,\x20which\x20must\x20contain\x20a\x20<code>go.mod</code>\x20file.\x20The\x0areplacement\x20version\x20must\x20be\x20omitted\x20in\x20this\x20case.</p>\x0a<p>If\x20the\x20path\x20on\x20the\x20right\x20side\x20is\x20not\x20a\x20local\x20path,\x20it\x20must\x20be\x20a\x20valid\x20module\x0apath.\x20In\x20this\x20case,\x20a\x20version\x20is\x20required.\x20The\x20same\x20module\x20version\x20must\x20not\x0aalso\x20appear\x20in\x20the\x20build\x20list.</p>\x0a<p>Regardless\x20of\x20whether\x20a\x20replacement\x20is\x20specified\x20with\x20a\x20local\x20path\x20or\x20module\x0apath,\x20if\x20the\x20replacement\x20module\x20has\x20a\x20<code>go.mod</code>\x20file,\x20its\x20<code>module</code>\x20directive\x0amust\x20match\x20the\x20module\x20path\x20it\x20replaces.</p>\x0a<p><code>replace</code>\x20directives\x20only\x20apply\x20in\x20the\x20main\x20module's\x20<code>go.mod</code>\x20file\x0aand\x20are\x20ignored\x20in\x20other\x20modules.\x20See\x20<a\x20href=\"#minimal-version-selection\">Minimal\x20version\x0aselection</a>\x20for\x20details.</p>\x0a<pre><code>ReplaceDirective\x20=\x20&quot;replace&quot;\x20(\x20ReplaceSpec\x20|\x20&quot;(&quot;\x20newline\x20{\x20ReplaceSpec\x20}\x20&quot;)&quot;\x20newline\x20&quot;)&quot;\x20)\x20.\x0aReplaceSpec\x20=\x20ModulePath\x20[\x20Version\x20]\x20&quot;=&gt;&quot;\x20FilePath\x20newline\x0a\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20|\x20ModulePath\x20[\x20Version\x20]\x20&quot;=&gt;&quot;\x20ModulePath\x20Version\x20newline\x20.\x0aFilePath\x20=\x20/*\x20platform-specific\x20relative\x20or\x20absolute\x20file\x20path\x20*/\x0a</code></pre>\x0a<p>Example:</p>\x0a<pre><code>replace\x20golang.org/x/net\x20v1.2.3\x20=&gt;\x20example.com/fork/net\x20v1.4.5\x0a\x0areplace\x20(\x0a\x20\x20\x20\x20golang.org/x/net\x20v1.2.3\x20=&gt;\x20example.com/fork/net\x20v1.4.5\x0a\x20\x20\x20\x20golang.org/x/net\x20=&gt;\x20example.com/fork/net\x20v1.4.5\x0a\x20\x20\x20\x20golang.org/x/net\x20v1.2.3\x20=&gt;\x20./fork/net\x0a\x20\x20\x20\x20golang.org/x/net\x20=&gt;\x20./fork/net\x0a)\x0a</code></pre>\x0a<p><a\x20id=\"go.mod-updates\"></a></p>\x0a<h3>Automatic\x20updates</h3>\x0a<p>The\x20<code>go</code>\x20command\x20automatically\x20updates\x20<code>go.mod</code>\x20when\x20it\x20uses\x20the\x20module\x20graph\x20if\x0asome\x20information\x20is\x20missing\x20or\x20<code>go.mod</code>\x20doesn't\x20accurately\x20reflect\x20reality.\x20\x20For\x0aexample,\x20consider\x20this\x20<code>go.mod</code>\x20file:</p>\x0a<pre><code>module\x20example.com/M\x0a\x0arequire\x20(\x0a\x20\x20\x20\x20example.com/A\x20v1\x0a\x20\x20\x20\x20example.com/B\x20v1.0.0\x0a\x20\x20\x20\x20example.com/C\x20v1.0.0\x0a\x20\x20\x20\x20example.com/D\x20v1.2.3\x0a\x20\x20\x20\x20example.com/E\x20dev\x0a)\x0a\x0aexclude\x20example.com/D\x20v1.2.3\x0a</code></pre>\x0a<p>The\x20update\x20rewrites\x20non-canonical\x20version\x20identifiers\x20to\x0a<a\x20href=\"#glos-canonical-version\">canonical</a>\x20semver\x20form,\x20so\x20<code>example.com/A</code>'s\x20<code>v1</code>\x0abecomes\x20<code>v1.0.0</code>,\x20and\x20<code>example.com/E</code>'s\x20<code>dev</code>\x20becomes\x20the\x20pseudo-version\x20for\x20the\x0alatest\x20commit\x20on\x20the\x20<code>dev</code>\x20branch,\x20perhaps\x20<code>v0.0.0-20180523231146-b3f5c0f6e5f1</code>.</p>\x0a<p>The\x20update\x20modifies\x20requirements\x20to\x20respect\x20exclusions,\x20so\x20the\x20requirement\x20on\x0athe\x20excluded\x20<code>example.com/D\x20v1.2.3</code>\x20is\x20updated\x20to\x20use\x20the\x20next\x20available\x20version\x0aof\x20<code>example.com/D</code>,\x20perhaps\x20<code>v1.2.4</code>\x20or\x20<code>v1.3.0</code>.</p>\x0a<p>The\x20update\x20removes\x20redundant\x20or\x20misleading\x20requirements.\x20For\x20example,\x20if\x0a<code>example.com/A\x20v1.0.0</code>\x20itself\x20requires\x20<code>example.com/B\x20v1.2.0</code>\x20and\x20<code>example.com/C\x20v1.0.0</code>,\x20then\x20<code>go.mod</code>'s\x20requirement\x20of\x20<code>example.com/B\x20v1.0.0</code>\x20is\x20misleading\x0a(superseded\x20by\x20<code>example.com/A</code>'s\x20need\x20for\x20<code>v1.2.0</code>),\x20and\x20its\x20requirement\x20of\x0a<code>example.com/C\x20v1.0.0</code>\x20is\x20redundant\x20(implied\x20by\x20<code>example.com/A</code>'s\x20need\x20for\x20the\x0asame\x20version),\x20so\x20both\x20will\x20be\x20removed.\x20If\x20the\x20main\x20module\x20contains\x20packages\x0athat\x20directly\x20import\x20packages\x20from\x20<code>example.com/B</code>\x20or\x20<code>example.com/C</code>,\x20then\x20the\x0arequirements\x20will\x20be\x20kept\x20but\x20updated\x20to\x20the\x20actual\x20versions\x20being\x20used.</p>\x0a<p>Finally,\x20the\x20update\x20reformats\x20the\x20<code>go.mod</code>\x20in\x20a\x20canonical\x20formatting,\x20so\x0athat\x20future\x20mechanical\x20changes\x20will\x20result\x20in\x20minimal\x20diffs.\x20The\x20<code>go</code>\x20command\x0awill\x20not\x20update\x20<code>go.mod</code>\x20if\x20only\x20formatting\x20changes\x20are\x20needed.</p>\x0a<p>Because\x20the\x20module\x20graph\x20defines\x20the\x20meaning\x20of\x20import\x20statements,\x20any\x20commands\x0athat\x20load\x20packages\x20also\x20use\x20and\x20therefore\x20update\x20<code>go.mod</code>,\x20including\x20<code>go\x20build</code>,\x0a<code>go\x20get</code>,\x20<code>go\x20install</code>,\x20<code>go\x20list</code>,\x20<code>go\x20test</code>,\x20<code>go\x20mod\x20graph</code>,\x20<code>go\x20mod\x20tidy</code>,\x20and\x0a<code>go\x20mod\x20why</code>.</p>\x0a<p>The\x20<code>-mod=readonly</code>\x20flag\x20prevents\x20commands\x20from\x20automatically\x20updating\x0a<code>go.mod</code>.\x20However,\x20if\x20a\x20command\x20needs\x20to\x20perform\x20an\x20action\x20that\x20would\x0aupdate\x20to\x20<code>go.mod</code>,\x20it\x20will\x20report\x20an\x20error.\x20For\x20example,\x20if\x0a<code>go\x20build</code>\x20is\x20asked\x20to\x20build\x20a\x20package\x20not\x20provided\x20by\x20any\x20module\x20in\x20the\x20build\x0alist,\x20<code>go\x20build</code>\x20will\x20report\x20an\x20error\x20instead\x20of\x20looking\x20up\x20the\x20module\x20and\x0aupdating\x20requirements\x20in\x20<code>go.mod</code>.</p>\x0a<p><a\x20id=\"minimal-version-selection\"></a></p>\x0a<h2>Minimal\x20version\x20selection\x20(MVS)</h2>\x0a<p><a\x20id=\"non-module-compat\"></a></p>\x0a<h2>Compatibility\x20with\x20non-module\x20repositories</h2>\x0a<p><a\x20id=\"mod-commands\"></a></p>\x0a<h2>Module-aware\x20commands</h2>\x0a<p>Most\x20<code>go</code>\x20commands\x20may\x20run\x20in\x20<em>Module-aware\x20mode</em>\x20or\x20<em><code>GOPATH</code>\x20mode</em>.\x20In\x0amodule-aware\x20mode,\x20the\x20<code>go</code>\x20command\x20uses\x20<code>go.mod</code>\x20files\x20to\x20find\x20versioned\x0adependencies,\x20and\x20it\x20typically\x20loads\x20packages\x20out\x20of\x20the\x20<a\x20href=\"#glos-module-cache\">module\x0acache</a>,\x20downloading\x20modules\x20if\x20they\x20are\x20missing.\x20In\x20<code>GOPATH</code>\x0amode,\x20the\x20<code>go</code>\x20command\x20ignores\x20modules;\x20it\x20looks\x20in\x20<code>vendor</code>\x20directories\x20and\x20in\x0a<code>GOPATH</code>\x20to\x20find\x20dependencies.</p>\x0a<p>Module-aware\x20mode\x20is\x20active\x20by\x20default\x20whenever\x20a\x20<code>go.mod</code>\x20file\x20is\x20found\x20in\x20the\x0acurrent\x20directory\x20or\x20in\x20any\x20parent\x20directory.\x20For\x20more\x20fine-grained\x20control,\x20the\x0a<code>GO111MODULE</code>\x20environment\x20variable\x20may\x20be\x20set\x20to\x20one\x20of\x20three\x20values:\x20<code>on</code>,\x0a<code>off</code>,\x20or\x20<code>auto</code>.</p>\x0a<ul>\x0a<li>If\x20<code>GO111MODULE=off</code>,\x20the\x20<code>go</code>\x20command\x20ignores\x20<code>go.mod</code>\x20files\x20and\x20runs\x20in\x0a<code>GOPATH</code>\x20mode.</li>\x0a<li>If\x20<code>GO111MODULE=on</code>,\x20the\x20<code>go</code>\x20command\x20runs\x20in\x20module-aware\x20mode,\x20even\x20when\x0ano\x20<code>go.mod</code>\x20file\x20is\x20present.\x20Not\x20all\x20commands\x20work\x20without\x20a\x20<code>go.mod</code>\x20file:\x0asee\x20<a\x20href=\"#commands-outside\">Module\x20commands\x20outside\x20a\x20module</a>.</li>\x0a<li>If\x20<code>GO111MODULE=auto</code>\x20or\x20is\x20unset,\x20the\x20<code>go</code>\x20command\x20runs\x20in\x20module-aware\x0amode\x20if\x20a\x20<code>go.mod</code>\x20file\x20is\x20present\x20in\x20the\x20current\x20directory\x20or\x20any\x20parent\x0adirectory\x20(the\x20default\x20behavior).</li>\x0a</ul>\x0a<p>In\x20module-aware\x20mode,\x20<code>GOPATH</code>\x20no\x20longer\x20defines\x20the\x20meaning\x20of\x20imports\x20during\x20a\x0abuild,\x20but\x20it\x20still\x20stores\x20downloaded\x20dependencies\x20(in\x20<code>GOPATH/pkg/mod</code>;\x20see\x0a<a\x20href=\"#module-cache\">Module\x20cache</a>)\x20and\x20installed\x20commands\x20(in\x20<code>GOPATH/bin</code>,\x20unless\x0a<code>GOBIN</code>\x20is\x20set).</p>\x0a<p><a\x20id=\"build-commands\"></a></p>\x0a<h3>Build\x20commands</h3>\x0a<p><a\x20id=\"vendoring\"></a></p>\x0a<h3>Vendoring</h3>\x0a<p>When\x20using\x20modules,\x20the\x20<code>go</code>\x20command\x20typically\x20satisfies\x20dependencies\x20by\x0adownloading\x20modules\x20from\x20their\x20sources\x20into\x20the\x20module\x20cache,\x20then\x20loading\x0apackages\x20from\x20those\x20downloaded\x20copies.\x20<em>Vendoring</em>\x20may\x20be\x20used\x20to\x20allow\x0ainteroperation\x20with\x20older\x20versions\x20of\x20Go,\x20or\x20to\x20ensure\x20that\x20all\x20files\x20used\x20for\x20a\x0abuild\x20are\x20stored\x20in\x20a\x20single\x20file\x20tree.</p>\x0a<p>The\x20<code>go\x20mod\x20vendor</code>\x20command\x20constructs\x20a\x20directory\x20named\x20<code>vendor</code>\x20in\x20the\x20<a\x20href=\"#glos-main-module\">main\x0amodule's</a>\x20root\x20directory\x20containing\x20copies\x20of\x20all\x20packages\x0aneeded\x20to\x20build\x20and\x20test\x20packages\x20in\x20the\x20main\x20module.\x20Packages\x20that\x20are\x20only\x0aimported\x20by\x20tests\x20of\x20packages\x20outside\x20the\x20main\x20module\x20are\x20not\x20included.\x20As\x20with\x0a<a\x20href=\"#go-mod-tidy\"><code>go\x20mod\x20tidy</code></a>\x20and\x20other\x20module\x20commands,\x20<a\x20href=\"#glos-build-constraint\">build\x0aconstraints</a>\x20except\x20for\x20<code>ignore</code>\x20are\x20not\x20considered\x20when\x0aconstructing\x20the\x20<code>vendor</code>\x20directory.</p>\x0a<p><code>go\x20mod\x20vendor</code>\x20also\x20creates\x20the\x20file\x20<code>vendor/modules.txt</code>\x20that\x20contains\x20a\x20list\x0aof\x20vendored\x20packages\x20and\x20the\x20module\x20versions\x20they\x20were\x20copied\x20from.\x20When\x0avendoring\x20is\x20enabled,\x20this\x20manifest\x20is\x20used\x20as\x20a\x20source\x20of\x20module\x20version\x0ainformation,\x20as\x20reported\x20by\x20<a\x20href=\"#go-list-m\"><code>go\x20list\x20-m</code></a>\x20and\x20<a\x20href=\"#go-version-m\"><code>go\x20version\x20-m</code></a>.\x20When\x20the\x20<code>go</code>\x20command\x20reads\x20<code>vendor/modules.txt</code>,\x20it\x20checks\x0athat\x20the\x20module\x20versions\x20are\x20consistent\x20with\x20<code>go.mod</code>.\x20If\x20<code>go.mod</code>\x20has\x20changed\x0asince\x20<code>vendor/modules.txt</code>\x20was\x20generated,\x20the\x20<code>go</code>\x20command\x20will\x20report\x20an\x20error.\x0a<code>go\x20mod\x20vendor</code>\x20should\x20be\x20run\x20again\x20to\x20update\x20the\x20<code>vendor</code>\x20directory.</p>\x0a<p>If\x20the\x20<code>vendor</code>\x20directory\x20is\x20present\x20in\x20the\x20main\x20module's\x20root\x20directory,\x20it\x0awill\x20be\x20used\x20automatically\x20if\x20the\x20<a\x20href=\"#go.mod-go\"><code>go</code>\x20version</a>\x20in\x20the\x20main\x0amodule's\x20<a\x20href=\"#glos-go.mod-file\"><code>go.mod</code>\x20file</a>\x20is\x20<code>1.14</code>\x20or\x20higher.\x20To\x20explicitly\x0aenable\x20vendoring,\x20invoke\x20the\x20<code>go</code>\x20command\x20with\x20the\x20flag\x20<code>-mod=vendor</code>.\x20To\x0adisable\x20vendoring,\x20use\x20the\x20flag\x20<code>-mod=mod</code>.</p>\x0a<p>When\x20vendoring\x20is\x20enabled,\x20<a\x20href=\"#build-commands\">build\x20commands</a>\x20like\x20<code>go\x20build</code>\x20and\x0a<code>go\x20test</code>\x20load\x20packages\x20from\x20the\x20<code>vendor</code>\x20directory\x20instead\x20of\x20accessing\x20the\x0anetwork\x20or\x20the\x20local\x20module\x20cache.\x20The\x20<a\x20href=\"#go-list-m\"><code>go\x20list\x20-m</code></a>\x20command\x20only\x0aprints\x20information\x20about\x20modules\x20listed\x20in\x20<code>go.mod</code>.\x20<code>go\x20mod</code>\x20commands\x20such\x20as\x0a<a\x20href=\"#go-mod-download\"><code>go\x20mod\x20download</code></a>\x20and\x20<a\x20href=\"#go-mod-tidy\"><code>go\x20mod\x20tidy</code></a>\x20do\x20not\x0awork\x20differently\x20when\x20vendoring\x20is\x20enabled\x20and\x20will\x20still\x20download\x20modules\x20and\x0aaccess\x20the\x20module\x20cache.\x20<a\x20href=\"#go-get\"><code>go\x20get</code></a>\x20also\x20does\x20not\x20work\x20differently\x20when\x0avendoring\x20is\x20enabled.</p>\x0a<p>Unlike\x20<a\x20href=\"https://golang.org/s/go15vendor\">vendoring\x20in\x20<code>GOPATH</code></a>,\x20the\x20<code>go</code>\x0acommand\x20ignores\x20vendor\x20directories\x20in\x20locations\x20other\x20than\x20the\x20main\x20module's\x0aroot\x20directory.</p>\x0a<p><a\x20id=\"go-get\"></a></p>\x0a<h3><code>go\x20get</code></h3>\x0a<p>Usage:</p>\x0a<pre><code>go\x20get\x20[-d]\x20[-t]\x20[-u]\x20[build\x20flags]\x20[packages]\x0a</code></pre>\x0a<p>Examples:</p>\x0a<pre><code>#\x20Install\x20the\x20latest\x20version\x20of\x20a\x20tool.\x0a$\x20go\x20get\x20golang.org/x/tools/cmd/goimports\x0a\x0a#\x20Upgrade\x20a\x20specific\x20module.\x0a$\x20go\x20get\x20-d\x20golang.org/x/net\x0a\x0a#\x20Upgrade\x20modules\x20that\x20provide\x20packages\x20imported\x20by\x20package\x20in\x20the\x20main\x20module.\x0a$\x20go\x20get\x20-u\x20./...\x0a\x0a#\x20Upgrade\x20or\x20downgrade\x20to\x20a\x20specific\x20version\x20of\x20a\x20module.\x0a$\x20go\x20get\x20-d\x20golang.org/x/text@v0.3.2\x0a\x0a#\x20Update\x20to\x20the\x20commit\x20on\x20the\x20module's\x20master\x20branch.\x0a$\x20go\x20get\x20-d\x20golang.org/x/text@master\x0a\x0a#\x20Remove\x20a\x20dependency\x20on\x20a\x20module\x20and\x20downgrade\x20modules\x20that\x20require\x20it\x0a#\x20to\x20versions\x20that\x20don't\x20require\x20it.\x0a$\x20go\x20get\x20-d\x20golang.org/x/text@none\x0a</code></pre>\x0a<p>The\x20<code>go\x20get</code>\x20command\x20updates\x20module\x20dependencies\x20in\x20the\x20<a\x20href=\"#go.mod-files\"><code>go.mod</code>\x0afile</a>\x20for\x20the\x20<a\x20href=\"#glos-main-module\">main\x20module</a>,\x20then\x20builds\x20and\x0ainstalls\x20packages\x20listed\x20on\x20the\x20command\x20line.</p>\x0a<p>The\x20first\x20step\x20is\x20to\x20determine\x20which\x20modules\x20to\x20update.\x20<code>go\x20get</code>\x20accepts\x20a\x20list\x0aof\x20packages,\x20package\x20patterns,\x20and\x20module\x20paths\x20as\x20arguments.\x20If\x20a\x20package\x0aargument\x20is\x20specified,\x20<code>go\x20get</code>\x20updates\x20the\x20module\x20that\x20provides\x20the\x20package.\x0aIf\x20a\x20package\x20pattern\x20is\x20specified\x20(for\x20example,\x20<code>all</code>\x20or\x20a\x20path\x20with\x20a\x20<code>...</code>\x0awildcard),\x20<code>go\x20get</code>\x20expands\x20the\x20pattern\x20to\x20a\x20set\x20of\x20packages,\x20then\x20updates\x20the\x0amodules\x20that\x20provide\x20the\x20packages.\x20If\x20an\x20argument\x20names\x20a\x20module\x20but\x20not\x20a\x0apackage\x20(for\x20example,\x20the\x20module\x20<code>golang.org/x/net</code>\x20has\x20no\x20package\x20in\x20its\x20root\x0adirectory),\x20<code>go\x20get</code>\x20will\x20update\x20the\x20module\x20but\x20will\x20not\x20build\x20a\x20package.\x20If\x20no\x0aarguments\x20are\x20specified,\x20<code>go\x20get</code>\x20acts\x20as\x20if\x20<code>.</code>\x20were\x20specified\x20(the\x20package\x20in\x0athe\x20current\x20directory);\x20this\x20may\x20be\x20used\x20together\x20with\x20the\x20<code>-u</code>\x20flag\x20to\x20update\x0amodules\x20that\x20provide\x20imported\x20packages.</p>\x0a<p>Each\x20argument\x20may\x20include\x20a\x20<dfn>version\x20query\x20suffix</dfn>\x20indicating\x20the\x0adesired\x20version,\x20as\x20in\x20<code>go\x20get\x20golang.org/x/text@v0.3.0</code>.\x20A\x20version\x20query\x0asuffix\x20consists\x20of\x20an\x20<code>@</code>\x20symbol\x20followed\x20by\x20a\x20<a\x20href=\"#version-queries\">version\x20query</a>,\x0awhich\x20may\x20indicate\x20a\x20specific\x20version\x20(<code>v0.3.0</code>),\x20a\x20version\x20prefix\x20(<code>v0.3</code>),\x0aa\x20branch\x20or\x20tag\x20name\x20(<code>master</code>),\x20a\x20revision\x20(<code>1234abcd</code>),\x20or\x20one\x20of\x20the\x20special\x0aqueries\x20<code>latest</code>,\x20<code>upgrade</code>,\x20<code>patch</code>,\x20or\x20<code>none</code>.\x20If\x20no\x20version\x20is\x20given,\x0a<code>go\x20get</code>\x20uses\x20the\x20<code>@upgrade</code>\x20query.</p>\x0a<p>Once\x20<code>go\x20get</code>\x20has\x20resolved\x20its\x20arguments\x20to\x20specific\x20modules\x20and\x20versions,\x20<code>go\x20get</code>\x20will\x20add,\x20change,\x20or\x20remove\x20<a\x20href=\"#go.mod-require\"><code>require</code>\x20directives</a>\x20in\x20the\x0amain\x20module's\x20<code>go.mod</code>\x20file\x20to\x20ensure\x20the\x20modules\x20remain\x20at\x20the\x20desired\x0aversions\x20in\x20the\x20future.\x20Note\x20that\x20required\x20versions\x20in\x20<code>go.mod</code>\x20files\x20are\x0a<em>minimum\x20versions</em>\x20and\x20may\x20be\x20increased\x20automatically\x20as\x20new\x20dependencies\x20are\x0aadded.\x20See\x20<a\x20href=\"#minimal-version-selection\">Minimal\x20version\x20selection\x20(MVS)</a>\x20for\x0adetails\x20on\x20how\x20versions\x20are\x20selected\x20and\x20conflicts\x20are\x20resolved\x20by\x20module-aware\x0acommands.</p>\x0a<!--\x20TODO(jayconrod):\x20add\x20diagrams\x20for\x20the\x20examples\x20below.\x0aWe\x20need\x20a\x20consistent\x20strategy\x20for\x20visualizing\x20module\x20graphs\x20here,\x20in\x20the\x20MVS\x0asection,\x20and\x20perhaps\x20in\x20other\x20documentation\x20(blog\x20posts,\x20etc.).\x0a-->\x0a<p>Other\x20modules\x20may\x20be\x20upgraded\x20when\x20a\x20module\x20named\x20on\x20the\x20command\x20line\x20is\x20added,\x0aupgraded,\x20or\x20downgraded\x20if\x20the\x20new\x20version\x20of\x20the\x20named\x20module\x20requires\x20other\x0amodules\x20at\x20higher\x20versions.\x20For\x20example,\x20suppose\x20module\x20<code>example.com/a</code>\x20is\x0aupgraded\x20to\x20version\x20<code>v1.5.0</code>,\x20and\x20that\x20version\x20requires\x20module\x20<code>example.com/b</code>\x0aat\x20version\x20<code>v1.2.0</code>.\x20If\x20module\x20<code>example.com/b</code>\x20is\x20currently\x20required\x20at\x20version\x0a<code>v1.1.0</code>,\x20<code>go\x20get\x20example.com/a@v1.5.0</code>\x20will\x20also\x20upgrade\x20<code>example.com/b</code>\x20to\x0a<code>v1.2.0</code>.</p>\x0a<p>Other\x20modules\x20may\x20be\x20downgraded\x20when\x20a\x20module\x20named\x20on\x20the\x20command\x20line\x20is\x0adowngraded\x20or\x20removed.\x20To\x20continue\x20the\x20above\x20example,\x20suppose\x20module\x0a<code>example.com/b</code>\x20is\x20downgraded\x20to\x20<code>v1.1.0</code>.\x20Module\x20<code>example.com/a</code>\x20would\x20also\x20be\x0adowngraded\x20to\x20a\x20version\x20that\x20requires\x20<code>example.com/b</code>\x20at\x20version\x20<code>v1.1.0</code>\x20or\x0alower.</p>\x0a<p>A\x20module\x20requirement\x20may\x20be\x20removed\x20using\x20the\x20version\x20suffix\x20<code>@none</code>.\x20This\x20is\x20a\x0aspecial\x20kind\x20of\x20downgrade.\x20Modules\x20that\x20depend\x20on\x20the\x20removed\x20module\x20will\x20be\x0adowngraded\x20or\x20removed\x20as\x20needed.\x20A\x20module\x20requirement\x20may\x20be\x20removed\x20even\x20if\x20one\x0aor\x20more\x20of\x20its\x20packages\x20are\x20imported\x20by\x20packages\x20in\x20the\x20main\x20module.\x20In\x20this\x0acase,\x20the\x20next\x20build\x20command\x20may\x20add\x20a\x20new\x20module\x20requirement.</p>\x0a<p>If\x20a\x20module\x20is\x20needed\x20at\x20two\x20different\x20versions\x20(specified\x20explicitly\x20in\x20command\x0aline\x20arguments\x20or\x20to\x20satisfy\x20upgrades\x20and\x20downgrades),\x20<code>go\x20get</code>\x20will\x20report\x20an\x0aerror.</p>\x0a<p>After\x20<code>go\x20get</code>\x20updates\x20the\x20<code>go.mod</code>\x20file,\x20it\x20builds\x20the\x20packages\x20named\x0aon\x20the\x20command\x20line.\x20Executables\x20will\x20be\x20installed\x20in\x20the\x20directory\x20named\x20by\x0athe\x20<code>GOBIN</code>\x20environment\x20variable,\x20which\x20defaults\x20to\x20<code>$GOPATH/bin</code>\x20or\x0a<code>$HOME/go/bin</code>\x20if\x20the\x20<code>GOPATH</code>\x20environment\x20variable\x20is\x20not\x20set.</p>\x0a<p><code>go\x20get</code>\x20supports\x20the\x20following\x20flags:</p>\x0a<ul>\x0a<li>The\x20<code>-d</code>\x20flag\x20tells\x20<code>go\x20get</code>\x20not\x20to\x20build\x20or\x20install\x20packages.\x20When\x20<code>-d</code>\x20is\x0aused,\x20<code>go\x20get</code>\x20will\x20only\x20manage\x20dependencies\x20in\x20<code>go.mod</code>.</li>\x0a<li>The\x20<code>-u</code>\x20flag\x20tells\x20<code>go\x20get</code>\x20to\x20upgrade\x20modules\x20providing\x20packages\x0aimported\x20directly\x20or\x20indirectly\x20by\x20packages\x20named\x20on\x20the\x20command\x20line.\x0aEach\x20module\x20selected\x20by\x20<code>-u</code>\x20will\x20be\x20upgraded\x20to\x20its\x20latest\x20version\x20unless\x0ait\x20is\x20already\x20required\x20at\x20a\x20higher\x20version\x20(a\x20pre-release).</li>\x0a<li>The\x20<code>-u=patch</code>\x20flag\x20(not\x20<code>-u\x20patch</code>)\x20also\x20tells\x20<code>go\x20get</code>\x20to\x20upgrade\x0adependencies,\x20but\x20<code>go\x20get</code>\x20will\x20upgrade\x20each\x20dependency\x20to\x20the\x20latest\x20patch\x0aversion\x20(similar\x20to\x20the\x20<code>@patch</code>\x20version\x20query).</li>\x0a<li>The\x20<code>-t</code>\x20flag\x20tells\x20<code>go\x20get</code>\x20to\x20consider\x20modules\x20needed\x20to\x20build\x20tests\x0aof\x20packages\x20named\x20on\x20the\x20command\x20line.\x20When\x20<code>-t</code>\x20and\x20<code>-u</code>\x20are\x20used\x20together,\x0a<code>go\x20get</code>\x20will\x20update\x20test\x20dependencies\x20as\x20well.</li>\x0a<li>The\x20<code>-insecure</code>\x20flag\x20should\x20no\x20longer\x20be\x20used.\x20It\x20permits\x20<code>go\x20get</code>\x20to\x20resolve\x0acustom\x20import\x20paths\x20and\x20fetch\x20from\x20repositories\x20and\x20module\x20proxies\x20using\x0ainsecure\x20schemes\x20such\x20as\x20HTTP.\x20The\x20<code>GOINSECURE</code>\x20<a\x20href=\"#environment-variables\">environment\x0avariable</a>\x20provides\x20more\x20fine-grained\x20control\x20and\x0ashould\x20be\x20used\x20instead.</li>\x0a</ul>\x0a<p><a\x20id=\"go-list-m\"></a></p>\x0a<h3><code>go\x20list\x20-m</code></h3>\x0a<p>Usage:</p>\x0a<pre><code>go\x20list\x20-m\x20[-u]\x20[-versions]\x20[list\x20flags]\x20[modules]\x0a</code></pre>\x0a<p>Example:</p>\x0a<pre><code>$\x20go\x20list\x20-m\x20all\x0a$\x20go\x20list\x20-m\x20-versions\x20example.com/m\x0a$\x20go\x20list\x20-m\x20-json\x20example.com/m@latest\x0a</code></pre>\x0a<p>The\x20<code>-m</code>\x20flag\x20causes\x20<code>go\x20list</code>\x20to\x20list\x20modules\x20instead\x20of\x20packages.\x20In\x20this\x0amode,\x20the\x20arguments\x20to\x20<code>go\x20list</code>\x20may\x20be\x20modules,\x20module\x20patterns\x20(containing\x20the\x0a<code>...</code>\x20wildcard),\x20<a\x20href=\"#version-queries\">version\x20queries</a>,\x20or\x20the\x20special\x20pattern\x0a<code>all</code>,\x20which\x20matches\x20all\x20modules\x20in\x20the\x20<a\x20href=\"#glos-build-list\">build\x20list</a>.\x20If\x20no\x0aarguments\x20are\x20specified,\x20the\x20<a\x20href=\"#glos-main-module\">main\x20module</a>\x20is\x20listed.</p>\x0a<p>When\x20listing\x20modules,\x20the\x20<code>-f</code>\x20flag\x20still\x20specifies\x20a\x20format\x20template\x20applied\x0ato\x20a\x20Go\x20struct,\x20but\x20now\x20a\x20<code>Module</code>\x20struct:</p>\x0a<pre><code>type\x20Module\x20struct\x20{\x0a\x20\x20\x20\x20Path\x20\x20\x20\x20\x20\x20string\x20\x20\x20\x20\x20\x20\x20//\x20module\x20path\x0a\x20\x20\x20\x20Version\x20\x20\x20string\x20\x20\x20\x20\x20\x20\x20//\x20module\x20version\x0a\x20\x20\x20\x20Versions\x20\x20[]string\x20\x20\x20\x20\x20//\x20available\x20module\x20versions\x20(with\x20-versions)\x0a\x20\x20\x20\x20Replace\x20\x20\x20*Module\x20\x20\x20\x20\x20\x20//\x20replaced\x20by\x20this\x20module\x0a\x20\x20\x20\x20Time\x20\x20\x20\x20\x20\x20*time.Time\x20\x20\x20//\x20time\x20version\x20was\x20created\x0a\x20\x20\x20\x20Update\x20\x20\x20\x20*Module\x20\x20\x20\x20\x20\x20//\x20available\x20update,\x20if\x20any\x20(with\x20-u)\x0a\x20\x20\x20\x20Main\x20\x20\x20\x20\x20\x20bool\x20\x20\x20\x20\x20\x20\x20\x20\x20//\x20is\x20this\x20the\x20main\x20module?\x0a\x20\x20\x20\x20Indirect\x20\x20bool\x20\x20\x20\x20\x20\x20\x20\x20\x20//\x20is\x20this\x20module\x20only\x20an\x20indirect\x20dependency\x20of\x20main\x20module?\x0a\x20\x20\x20\x20Dir\x20\x20\x20\x20\x20\x20\x20string\x20\x20\x20\x20\x20\x20\x20//\x20directory\x20holding\x20files\x20for\x20this\x20module,\x20if\x20any\x0a\x20\x20\x20\x20GoMod\x20\x20\x20\x20\x20string\x20\x20\x20\x20\x20\x20\x20//\x20path\x20to\x20go.mod\x20file\x20for\x20this\x20module,\x20if\x20any\x0a\x20\x20\x20\x20GoVersion\x20string\x20\x20\x20\x20\x20\x20\x20//\x20go\x20version\x20used\x20in\x20module\x0a\x20\x20\x20\x20Error\x20\x20\x20\x20\x20*ModuleError\x20//\x20error\x20loading\x20module\x0a}\x0a\x0atype\x20ModuleError\x20struct\x20{\x0a\x20\x20\x20\x20Err\x20string\x20//\x20the\x20error\x20itself\x0a}\x0a</code></pre>\x0a<p>The\x20default\x20output\x20is\x20to\x20print\x20the\x20module\x20path\x20and\x20then\x20information\x20about\x20the\x0aversion\x20and\x20replacement\x20if\x20any.\x20For\x20example,\x20<code>go\x20list\x20-m\x20all</code>\x20might\x20print:</p>\x0a<pre><code>example.com/main/module\x0agolang.org/x/text\x20v0.3.0\x20=&gt;\x20/tmp/text\x0arsc.io/pdf\x20v0.1.1\x0a</code></pre>\x0a<p>The\x20<code>Module</code>\x20struct\x20has\x20a\x20<code>String</code>\x20method\x20that\x20formats\x20this\x20line\x20of\x20output,\x20so\x0athat\x20the\x20default\x20format\x20is\x20equivalent\x20to\x20<code>-f\x20'{{.String}}'</code>.</p>\x0a<p>Note\x20that\x20when\x20a\x20module\x20has\x20been\x20replaced,\x20its\x20<code>Replace</code>\x20field\x20describes\x20the\x0areplacement\x20module\x20module,\x20and\x20its\x20<code>Dir</code>\x20field\x20is\x20set\x20to\x20the\x20replacement\x0amodule's\x20source\x20code,\x20if\x20present.\x20(That\x20is,\x20if\x20<code>Replace</code>\x20is\x20non-nil,\x20then\x20<code>Dir</code>\x0ais\x20set\x20to\x20<code>Replace.Dir</code>,\x20with\x20no\x20access\x20to\x20the\x20replaced\x20source\x20code.)</p>\x0a<p>The\x20<code>-u</code>\x20flag\x20adds\x20information\x20about\x20available\x20upgrades.\x20When\x20the\x20latest\x20version\x0aof\x20a\x20given\x20module\x20is\x20newer\x20than\x20the\x20current\x20one,\x20<code>list\x20-u</code>\x20sets\x20the\x20module's\x0a<code>Update</code>\x20field\x20to\x20information\x20about\x20the\x20newer\x20module.\x20The\x20module's\x20<code>String</code>\x0amethod\x20indicates\x20an\x20available\x20upgrade\x20by\x20formatting\x20the\x20newer\x20version\x20in\x0abrackets\x20after\x20the\x20current\x20version.\x20For\x20example,\x20<code>go\x20list\x20-m\x20-u\x20all</code>\x20might\x0aprint:</p>\x0a<pre><code>example.com/main/module\x0agolang.org/x/text\x20v0.3.0\x20[v0.4.0]\x20=&gt;\x20/tmp/text\x0arsc.io/pdf\x20v0.1.1\x20[v0.1.2]\x0a</code></pre>\x0a<p>(For\x20tools,\x20<code>go\x20list\x20-m\x20-u\x20-json\x20all</code>\x20may\x20be\x20more\x20convenient\x20to\x20parse.)</p>\x0a<p>The\x20<code>-versions</code>\x20flag\x20causes\x20<code>list</code>\x20to\x20set\x20the\x20module's\x20<code>Versions</code>\x20field\x20to\x20a\x0alist\x20of\x20all\x20known\x20versions\x20of\x20that\x20module,\x20ordered\x20according\x20to\x20semantic\x0aversioning,\x20lowest\x20to\x20highest.\x20The\x20flag\x20also\x20changes\x20the\x20default\x20output\x20format\x0ato\x20display\x20the\x20module\x20path\x20followed\x20by\x20the\x20space-separated\x20version\x20list.</p>\x0a<p>The\x20template\x20function\x20<code>module</code>\x20takes\x20a\x20single\x20string\x20argument\x20that\x20must\x20be\x20a\x0amodule\x20path\x20or\x20query\x20and\x20returns\x20the\x20specified\x20module\x20as\x20a\x20<code>Module</code>\x20struct.\x20If\x0aan\x20error\x20occurs,\x20the\x20result\x20will\x20be\x20a\x20<code>Module</code>\x20struct\x20with\x20a\x20non-nil\x20<code>Error</code>\x0afield.</p>\x0a<p><a\x20id=\"go-mod-download\"></a></p>\x0a<h3><code>go\x20mod\x20download</code></h3>\x0a<p>Usage:</p>\x0a<pre><code>go\x20mod\x20download\x20[-json]\x20[-x]\x20[modules]\x0a</code></pre>\x0a<p>Example:</p>\x0a<pre><code>$\x20go\x20mod\x20download\x0a$\x20go\x20mod\x20download\x20golang.org/x/mod@v0.2.0\x0a</code></pre>\x0a<p>The\x20<code>go\x20mod\x20download</code>\x20command\x20downloads\x20the\x20named\x20modules\x20into\x20the\x20<a\x20href=\"#glos-module-cache\">module\x0acache</a>.\x20Arguments\x20can\x20be\x20module\x20paths\x20or\x20module\x0apatterns\x20selecting\x20dependencies\x20of\x20the\x20main\x20module\x20or\x20<a\x20href=\"#version-queries\">version\x0aqueries</a>\x20of\x20the\x20form\x20<code>path@version</code>.\x20With\x20no\x20arguments,\x0a<code>download</code>\x20applies\x20to\x20all\x20dependencies\x20of\x20the\x20<a\x20href=\"#glos-main-module\">main\x20module</a>.</p>\x0a<p>The\x20<code>go</code>\x20command\x20will\x20automatically\x20download\x20modules\x20as\x20needed\x20during\x20ordinary\x0aexecution.\x20The\x20<code>go\x20mod\x20download</code>\x20command\x20is\x20useful\x20mainly\x20for\x20pre-filling\x20the\x0amodule\x20cache\x20or\x20for\x20loading\x20data\x20to\x20be\x20served\x20by\x20a\x20<a\x20href=\"#glos-module-proxy\">module\x0aproxy</a>.</p>\x0a<p>By\x20default,\x20<code>download</code>\x20writes\x20nothing\x20to\x20standard\x20output.\x20It\x20prints\x20progress\x0amessages\x20and\x20errors\x20to\x20standard\x20error.</p>\x0a<p>The\x20<code>-json</code>\x20flag\x20causes\x20<code>download</code>\x20to\x20print\x20a\x20sequence\x20of\x20JSON\x20objects\x20to\x0astandard\x20output,\x20describing\x20each\x20downloaded\x20module\x20(or\x20failure),\x20corresponding\x0ato\x20this\x20Go\x20struct:</p>\x0a<pre><code>type\x20Module\x20struct\x20{\x0a\x20\x20\x20\x20Path\x20\x20\x20\x20\x20string\x20//\x20module\x20path\x0a\x20\x20\x20\x20Version\x20\x20string\x20//\x20module\x20version\x0a\x20\x20\x20\x20Error\x20\x20\x20\x20string\x20//\x20error\x20loading\x20module\x0a\x20\x20\x20\x20Info\x20\x20\x20\x20\x20string\x20//\x20absolute\x20path\x20to\x20cached\x20.info\x20file\x0a\x20\x20\x20\x20GoMod\x20\x20\x20\x20string\x20//\x20absolute\x20path\x20to\x20cached\x20.mod\x20file\x0a\x20\x20\x20\x20Zip\x20\x20\x20\x20\x20\x20string\x20//\x20absolute\x20path\x20to\x20cached\x20.zip\x20file\x0a\x20\x20\x20\x20Dir\x20\x20\x20\x20\x20\x20string\x20//\x20absolute\x20path\x20to\x20cached\x20source\x20root\x20directory\x0a\x20\x20\x20\x20Sum\x20\x20\x20\x20\x20\x20string\x20//\x20checksum\x20for\x20path,\x20version\x20(as\x20in\x20go.sum)\x0a\x20\x20\x20\x20GoModSum\x20string\x20//\x20checksum\x20for\x20go.mod\x20(as\x20in\x20go.sum)\x0a}\x0a</code></pre>\x0a<p>The\x20<code>-x</code>\x20flag\x20causes\x20<code>download</code>\x20to\x20print\x20the\x20commands\x20<code>download</code>\x20executes\x0ato\x20standard\x20error.</p>\x0a<p><a\x20id=\"go-mod-edit\"></a></p>\x0a<h3><code>go\x20mod\x20edit</code></h3>\x0a<p><a\x20id=\"go-mod-init\"></a></p>\x0a<h3><code>go\x20mod\x20init</code></h3>\x0a<p>Usage:</p>\x0a<pre><code>go\x20mod\x20init\x20[module-path]\x0a</code></pre>\x0a<p>Example:</p>\x0a<pre><code>go\x20mod\x20init\x0ago\x20mod\x20init\x20example.com/m\x0a</code></pre>\x0a<p>The\x20<code>go\x20mod\x20init</code>\x20command\x20initializes\x20and\x20writes\x20a\x20new\x20<code>go.mod</code>\x20file\x20in\x20the\x0acurrent\x20directory,\x20in\x20effect\x20creating\x20a\x20new\x20module\x20rooted\x20at\x20the\x20current\x0adirectory.\x20The\x20<code>go.mod</code>\x20file\x20must\x20not\x20already\x20exist.</p>\x0a<p><code>init</code>\x20accepts\x20one\x20optional\x20argument,\x20the\x20<a\x20href=\"#glos-module-path\">module\x20path</a>\x20for\x0athe\x20new\x20module.\x20See\x20<a\x20href=\"#module-path\">Module\x20paths</a>\x20for\x20instructions\x20on\x20choosing\x0aa\x20module\x20path.\x20If\x20the\x20module\x20path\x20argument\x20is\x20omitted,\x20<code>init</code>\x20will\x20attempt\x0ato\x20infer\x20the\x20module\x20path\x20using\x20import\x20comments\x20in\x20<code>.go</code>\x20files,\x20vendoring\x20tool\x0aconfiguration\x20files,\x20and\x20the\x20current\x20directory\x20(if\x20in\x20<code>GOPATH</code>).</p>\x0a<p>If\x20a\x20configuration\x20file\x20for\x20a\x20vendoring\x20tool\x20is\x20present,\x20<code>init</code>\x20will\x20attempt\x20to\x0aimport\x20module\x20requirements\x20from\x20it.\x20<code>init</code>\x20supports\x20the\x20following\x20configuration\x0afiles.</p>\x0a<ul>\x0a<li><code>GLOCKFILE</code>\x20(Glock)</li>\x0a<li><code>Godeps/Godeps.json</code>\x20(Godeps)</li>\x0a<li><code>Gopkg.lock</code>\x20(dep)</li>\x0a<li><code>dependencies.tsv</code>\x20(godeps)</li>\x0a<li><code>glide.lock</code>\x20(glide)</li>\x0a<li><code>vendor.conf</code>\x20(trash)</li>\x0a<li><code>vendor.yml</code>\x20(govend)</li>\x0a<li><code>vendor/manifest</code>\x20(gvt)</li>\x0a<li><code>vendor/vendor.json</code>\x20(govendor)</li>\x0a</ul>\x0a<p>Vendoring\x20tool\x20configuration\x20files\x20can't\x20always\x20be\x20translated\x20with\x20perfect\x0afidelity.\x20For\x20example,\x20if\x20multiple\x20packages\x20within\x20the\x20same\x20repository\x20are\x0aimported\x20at\x20different\x20versions,\x20and\x20the\x20repository\x20only\x20contains\x20one\x20module,\x20the\x0aimported\x20<code>go.mod</code>\x20can\x20only\x20require\x20the\x20module\x20at\x20one\x20version.\x20You\x20may\x20wish\x20to\x0arun\x20<a\x20href=\"#go-list-m\"><code>go\x20list\x20-m\x20all</code></a>\x20to\x20check\x20all\x20versions\x20in\x20the\x20<a\x20href=\"#glos-build-list\">build\x0alist</a>,\x20and\x20<a\x20href=\"#go-mod-tidy\"><code>go\x20mod\x20tidy</code></a>\x20to\x20add\x20missing\x0arequirements\x20and\x20to\x20drop\x20unused\x20requirements.</p>\x0a<p><a\x20id=\"go-mod-tidy\"></a></p>\x0a<h3><code>go\x20mod\x20tidy</code></h3>\x0a<p><a\x20id=\"go-mod-vendor\"></a></p>\x0a<h3><code>go\x20mod\x20vendor</code></h3>\x0a<p>Usage:</p>\x0a<pre><code>go\x20mod\x20vendor\x20[-v]\x0a</code></pre>\x0a<p>The\x20<code>go\x20mod\x20vendor</code>\x20command\x20constructs\x20a\x20directory\x20named\x20<code>vendor</code>\x20in\x20the\x20<a\x20href=\"#glos-main-module\">main\x0amodule's</a>\x20root\x20directory\x20that\x20contains\x20copies\x20of\x20all\x20packages\x0aneeded\x20to\x20support\x20builds\x20and\x20tests\x20of\x20packages\x20in\x20the\x20main\x20module.\x20Packages\x0athat\x20are\x20only\x20imported\x20by\x20tests\x20of\x20packages\x20outside\x20the\x20main\x20module\x20are\x20not\x0aincluded.\x20As\x20with\x20<a\x20href=\"#go-mod-tidy\"><code>go\x20mod\x20tidy</code></a>\x20and\x20other\x20module\x20commands,\x0a<a\x20href=\"#glos-build-constraint\">build\x20constraints</a>\x20except\x20for\x20<code>ignore</code>\x20are\x20not\x0aconsidered\x20when\x20constructing\x20the\x20<code>vendor</code>\x20directory.</p>\x0a<p>When\x20vendoring\x20is\x20enabled,\x20the\x20<code>go</code>\x20command\x20will\x20load\x20packages\x20from\x20the\x20<code>vendor</code>\x0adirectory\x20instead\x20of\x20downloading\x20modules\x20from\x20their\x20sources\x20into\x20the\x20module\x0acache\x20and\x20using\x20packages\x20those\x20downloaded\x20copies.\x20See\x20<a\x20href=\"#vendoring\">Vendoring</a>\x0afor\x20more\x20information.</p>\x0a<p><code>go\x20mod\x20vendor</code>\x20also\x20creates\x20the\x20file\x20<code>vendor/modules.txt</code>\x20that\x20contains\x20a\x20list\x0aof\x20vendored\x20packages\x20and\x20the\x20module\x20versions\x20they\x20were\x20copied\x20from.\x20When\x0avendoring\x20is\x20enabled,\x20this\x20manifest\x20is\x20used\x20as\x20a\x20source\x20of\x20module\x20version\x0ainformation,\x20as\x20reported\x20by\x20<a\x20href=\"#go-list-m\"><code>go\x20list\x20-m</code></a>\x20and\x20<a\x20href=\"#go-version-m\"><code>go\x20version\x20-m</code></a>.\x20When\x20the\x20<code>go</code>\x20command\x20reads\x20<code>vendor/modules.txt</code>,\x20it\x20checks\x0athat\x20the\x20module\x20versions\x20are\x20consistent\x20with\x20<code>go.mod</code>.\x20If\x20<code>go.mod</code>\x20changed\x20since\x0a<code>vendor/modules.txt</code>\x20was\x20generated,\x20<code>go\x20mod\x20vendor</code>\x20should\x20be\x20run\x20again.</p>\x0a<p>Note\x20that\x20<code>go\x20mod\x20vendor</code>\x20removes\x20the\x20<code>vendor</code>\x20directory\x20if\x20it\x20exists\x20before\x0are-constructing\x20it.\x20Local\x20changes\x20should\x20not\x20be\x20made\x20to\x20vendored\x20packages.\x0aThe\x20<code>go</code>\x20command\x20does\x20not\x20check\x20that\x20packages\x20in\x20the\x20<code>vendor</code>\x20directory\x20have\x0anot\x20been\x20modified,\x20but\x20one\x20can\x20verify\x20the\x20integrity\x20of\x20the\x20<code>vendor</code>\x20directory\x0aby\x20running\x20<code>go\x20mod\x20vendor</code>\x20and\x20checking\x20that\x20no\x20changes\x20were\x20made.</p>\x0a<p>The\x20<code>-v</code>\x20flag\x20causes\x20<code>go\x20mod\x20vendor</code>\x20to\x20print\x20the\x20names\x20of\x20vendored\x20modules\x0aand\x20packages\x20to\x20standard\x20error.</p>\x0a<p><a\x20id=\"go-mod-verify\"></a></p>\x0a<h3><code>go\x20mod\x20verify</code></h3>\x0a<p><a\x20id=\"go-version-m\"></a></p>\x0a<h3><code>go\x20version\x20-m</code></h3>\x0a<p><a\x20id=\"go-clean-modcache\"></a></p>\x0a<h3><code>go\x20clean\x20-modcache</code></h3>\x0a<p><a\x20id=\"version-queries\"></a></p>\x0a<h3>Version\x20queries</h3>\x0a<p>Several\x20commands\x20allow\x20you\x20to\x20specify\x20a\x20version\x20of\x20a\x20module\x20using\x20a\x20<em>version\x0aquery</em>,\x20which\x20appears\x20after\x20an\x20<code>@</code>\x20character\x20following\x20a\x20module\x20or\x20package\x20path\x0aon\x20the\x20command\x20line.</p>\x0a<p>Examples:</p>\x0a<pre><code>go\x20get\x20example.com/m@latest\x0ago\x20mod\x20download\x20example.com/m@master\x0ago\x20list\x20-m\x20-json\x20example.com/m@e3702bed2\x0a</code></pre>\x0a<p>A\x20version\x20query\x20may\x20be\x20one\x20of\x20the\x20following:</p>\x0a<ul>\x0a<li>A\x20fully-specified\x20semantic\x20version,\x20such\x20as\x20<code>v1.2.3</code>,\x20which\x20selects\x20a\x0aspecific\x20version.\x20See\x20<a\x20href=\"#versions\">Versions</a>\x20for\x20syntax.</li>\x0a<li>A\x20semantic\x20version\x20prefix,\x20such\x20as\x20<code>v1</code>\x20or\x20<code>v1.2</code>,\x20which\x20selects\x20the\x20highest\x0aavailable\x20version\x20with\x20that\x20prefix.</li>\x0a<li>A\x20semantic\x20version\x20comparison,\x20such\x20as\x20<code>&lt;v1.2.3</code>\x20or\x20<code>&gt;=v1.5.6</code>,\x20which\x20selects\x0athe\x20nearest\x20available\x20version\x20to\x20the\x20comparison\x20target\x20(the\x20lowest\x20version\x0afor\x20<code>&gt;</code>\x20and\x20<code>&gt;=</code>,\x20and\x20the\x20highest\x20version\x20for\x20<code>&lt;</code>\x20and\x20<code>&lt;=</code>).</li>\x0a<li>A\x20revision\x20identifier\x20for\x20the\x20underlying\x20source\x20repository,\x20such\x20as\x20a\x20commit\x0ahash\x20prefix,\x20revision\x20tag,\x20or\x20branch\x20name.\x20If\x20the\x20revision\x20is\x20tagged\x20with\x20a\x0asemantic\x20version,\x20this\x20query\x20selects\x20that\x20version.\x20Otherwise,\x20this\x20query\x0aselects\x20a\x20<a\x20href=\"#glos-pseudo-version\">pseudo-version</a>\x20for\x20the\x20underlying\x0acommit.\x20Note\x20that\x20branches\x20and\x20tags\x20with\x20names\x20matched\x20by\x20other\x20version\x0aqueries\x20cannot\x20be\x20selected\x20this\x20way.\x20For\x20example,\x20the\x20query\x20<code>v2</code>\x20selects\x20the\x0alatest\x20version\x20starting\x20with\x20<code>v2</code>,\x20not\x20the\x20branch\x20named\x20<code>v2</code>.</li>\x0a<li>The\x20string\x20<code>latest</code>,\x20which\x20selects\x20the\x20highest\x20available\x20release\x20version.\x20If\x0athere\x20are\x20no\x20release\x20versions,\x20<code>latest</code>\x20selects\x20the\x20highest\x20pre-release\x0aversion.\x20\x20If\x20there\x20no\x20tagged\x20versions,\x20<code>latest</code>\x20selects\x20a\x20pseudo-version\x20for\x0athe\x20commit\x20at\x20the\x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\x0amissing.</p>\x0a<p>The\x20<code>go</code>\x20command\x20doesn't\x20need\x20to\x20directly\x20connect\x20to\x20the\x20checksum\x20database.\x20It\x0acan\x20request\x20module\x20sums\x20via\x20a\x20module\x20proxy\x20that\x0a<a\x20href=\"https://go.googlesource.com/proposal/+/master/design/25530-sumdb.md#proxying-a-checksum-database\">mirrors\x20the\x20checksum\x20database</a>\x0aand\x20supports\x20the\x20protocol\x20above.\x20This\x20can\x20be\x20particularly\x20helpful\x20for\x20private,\x0acorporate\x20proxies\x20which\x20block\x20requests\x20outside\x20the\x20organization.</p>\x0a<p>The\x20<code>GOSUMDB</code>\x20environment\x20variable\x20identifies\x20the\x20name\x20of\x20checksum\x20database\x20to\x20use\x0aand\x20optionally\x20its\x20public\x20key\x20and\x20URL,\x20as\x20in:</p>\x0a<pre><code>GOSUMDB=&quot;sum.golang.org&quot;\x0aGOSUMDB=&quot;sum.golang.org+&lt;publickey&gt;&quot;\x0aGOSUMDB=&quot;sum.golang.org+&lt;publickey&gt;\x20https://sum.golang.org&quot;\x0a</code></pre>\x0a<p>The\x20<code>go</code>\x20command\x20knows\x20the\x20public\x20key\x20of\x20<code>sum.golang.org</code>,\x20and\x20also\x20that\x20the\x0aname\x20<code>sum.golang.google.cn</code>\x20(available\x20inside\x20mainland\x20China)\x20connects\x20to\x20the\x0a<code>sum.golang.org</code>\x20checksum\x20database;\x20use\x20of\x20any\x20other\x20database\x20requires\x20giving\x0athe\x20public\x20key\x20explicitly.\x20The\x20URL\x20defaults\x20to\x20<code>https://</code>\x20followed\x20by\x20the\x0adatabase\x20name.</p>\x0a<p><code>GOSUMDB</code>\x20defaults\x20to\x20<code>sum.golang.org</code>,\x20the\x20Go\x20checksum\x20database\x20run\x20by\x20Google.\x0aSee\x20https://sum.golang.org/privacy\x20for\x20the\x20service's\x20privacy\x20policy.</p>\x0a<p>If\x20<code>GOSUMDB</code>\x20is\x20set\x20to\x20<code>off</code>,\x20or\x20if\x20<code>go\x20get</code>\x20is\x20invoked\x20with\x20the\x20<code>-insecure</code>\x0aflag,\x20the\x20checksum\x20database\x20is\x20not\x20consulted,\x20and\x20all\x20unrecognized\x20modules\x20are\x0aaccepted,\x20at\x20the\x20cost\x20of\x20giving\x20up\x20the\x20security\x20guarantee\x20of\x20verified\x0arepeatable\x20downloads\x20for\x20all\x20modules.\x20A\x20better\x20way\x20to\x20bypass\x20the\x20checksum\x0adatabase\x20for\x20specific\x20modules\x20is\x20to\x20use\x20the\x20<code>GOPRIVATE</code>\x20or\x20<code>GONOSUMDB</code>\x0aenvironment\x20variables.\x20See\x20<a\x20href=\"#private-modules\">Private\x20Modules</a>\x20for\x20details.</p>\x0a<p>The\x20<code>go\x20env\x20-w</code>\x20command\x20can\x20be\x20used\x20to\x0a<a\x20href=\"/pkg/cmd/go/#hdr-Print_Go_environment_information\">set\x20these\x20variables</a>\x0afor\x20future\x20<code>go</code>\x20command\x20invocations.</p>\x0a<p><a\x20id=\"privacy\"></a></p>\x0a<h2>Privacy</h2>\x0a<p><a\x20id=\"environment-variables\"></a></p>\x0a<h2>Environment\x20variables</h2>\x0a<p><a\x20id=\"glossary\"></a></p>\x0a<h2>Glossary</h2>\x0a<p><a\x20id=\"glos-build-constraint\"></a>\x0a<strong>build\x20constraint:</strong>\x20A\x20condition\x20that\x20determines\x20whether\x20a\x20Go\x20source\x20file\x20is\x0aused\x20when\x20compiling\x20a\x20package.\x20Build\x20constraints\x20may\x20be\x20expressed\x20with\x20file\x20name\x0asuffixes\x20(for\x20example,\x20<code>foo_linux_amd64.go</code>)\x20or\x20with\x20build\x20constraint\x20comments\x0a(for\x20example,\x20<code>//\x20+build\x20linux,amd64</code>).\x20See\x20<a\x20href=\"https://golang.org/pkg/go/build/#hdr-Build_Constraints\">Build\x0aConstraints</a>.</p>\x0a<p><a\x20id=\"glos-build-list\"></a>\x0a<strong>build\x20list:</strong>\x20The\x20list\x20of\x20module\x20versions\x20that\x20will\x20be\x20used\x20for\x20a\x20build\x0acommand\x20such\x20as\x20<code>go\x20build</code>,\x20<code>go\x20list</code>,\x20or\x20<code>go\x20test</code>.\x20The\x20build\x20list\x20is\x0adetermined\x20from\x20the\x20<a\x20href=\"#glos-main-module\">main\x20module's</a>\x20<a\x20href=\"#glos-go.mod-file\"><code>go.mod</code>\x0afile</a>\x20and\x20<code>go.mod</code>\x20files\x20in\x20transitively\x20required\x20modules\x0ausing\x20<a\x20href=\"#glos-minimal-version-selection\">minimal\x20version\x20selection</a>.\x20The\x20build\x0alist\x20contains\x20versions\x20for\x20all\x20modules\x20in\x20the\x20<a\x20href=\"#glos-module-graph\">module\x0agraph</a>,\x20not\x20just\x20those\x20relevant\x20to\x20a\x20specific\x20command.</p>\x0a<p><a\x20id=\"glos-canonical-version\"></a>\x0a<strong>canonical\x20version:</strong>\x20A\x20correctly\x20formatted\x20<a\x20href=\"#glos-version\">version</a>\x20without\x0aa\x20build\x20metadata\x20suffix\x20other\x20than\x20<code>+incompatible</code>.\x20For\x20example,\x20<code>v1.2.3</code>\x0ais\x20a\x20canonical\x20version,\x20but\x20<code>v1.2.3+meta</code>\x20is\x20not.</p>\x0a<p><a\x20id=\"glos-go.mod-file\"></a>\x0a<strong><code>go.mod</code>\x20file:</strong>\x20The\x20file\x20that\x20defines\x20a\x20module's\x20path,\x20requirements,\x20and\x0aother\x20metadata.\x20Appears\x20in\x20the\x20<a\x20href=\"#glos-module-root-directory\">module's\x20root\x0adirectory</a>.\x20See\x20the\x20section\x20on\x20<a\x20href=\"#go.mod-files\"><code>go.mod</code>\x0afiles</a>.</p>\x0a<p><a\x20id=\"glos-import-path\"></a>\x0a<strong>import\x20path:</strong>\x20A\x20string\x20used\x20to\x20import\x20a\x20package\x20in\x20a\x20Go\x20source\x20file.\x0aSynonymous\x20with\x20<a\x20href=\"#glos-package-path\">package\x20path</a>.</p>\x0a<p><a\x20id=\"glos-main-module\"></a>\x0a<strong>main\x20module:</strong>\x20The\x20module\x20in\x20which\x20the\x20<code>go</code>\x20command\x20is\x20invoked.</p>\x0a<p><a\x20id=\"glos-major-version\"></a>\x0a<strong>major\x20version:</strong>\x20The\x20first\x20number\x20in\x20a\x20semantic\x20version\x20(<code>1</code>\x20in\x20<code>v1.2.3</code>).\x20In\x0aa\x20release\x20with\x20incompatible\x20changes,\x20the\x20major\x20version\x20must\x20be\x20incremented,\x20and\x0athe\x20minor\x20and\x20patch\x20versions\x20must\x20be\x20set\x20to\x200.\x20Semantic\x20versions\x20with\x20major\x0aversion\x200\x20are\x20considered\x20unstable.</p>\x0a<p><a\x20id=\"glos-major-version-suffix\"></a>\x0a<strong>major\x20version\x20suffix:</strong>\x20A\x20module\x20path\x20suffix\x20that\x20matches\x20the\x20major\x20version\x0anumber.\x20For\x20example,\x20<code>/v2</code>\x20in\x20<code>example.com/mod/v2</code>.\x20Major\x20version\x20suffixes\x20are\x0arequired\x20at\x20<code>v2.0.0</code>\x20and\x20later\x20and\x20are\x20not\x20allowed\x20at\x20earlier\x20versions.\x20See\x0athe\x20section\x20on\x20<a\x20href=\"#major-version-suffixes\">Major\x20version\x20suffixes</a>.</p>\x0a<p><a\x20id=\"glos-minimal-version-selection\"></a>\x0a<strong>minimal\x20version\x20selection\x20(MVS):</strong>\x20The\x20algorithm\x20used\x20to\x20determine\x20the\x0aversions\x20of\x20all\x20modules\x20that\x20will\x20be\x20used\x20in\x20a\x20build.\x20See\x20the\x20section\x20on\x0a<a\x20href=\"#minimal-version-selection\">Minimal\x20version\x20selection</a>\x20for\x20details.</p>\x0a<p><a\x20id=\"glos-minor-version\"></a>\x0a<strong>minor\x20version:</strong>\x20The\x20second\x20number\x20in\x20a\x20semantic\x20version\x20(<code>2</code>\x20in\x20<code>v1.2.3</code>).\x20In\x0aa\x20release\x20with\x20new,\x20backwards\x20compatible\x20functionality,\x20the\x20minor\x20version\x20must\x0abe\x20incremented,\x20and\x20the\x20patch\x20version\x20must\x20be\x20set\x20to\x200.</p>\x0a<p><a\x20id=\"glos-module\"></a>\x0a<strong>module:</strong>\x20A\x20collection\x20of\x20packages\x20that\x20are\x20released,\x20versioned,\x20and\x0adistributed\x20together.</p>\x0a<p><a\x20id=\"glos-module-cache\"></a>\x0a<strong>module\x20cache:</strong>\x20A\x20local\x20directory\x20storing\x20downloaded\x20modules,\x20located\x20in\x0a<code>GOPATH/pkg/mod</code>.\x20See\x20<a\x20href=\"#module-cache\">Module\x20cache</a>.</p>\x0a<p><a\x20id=\"glos-module-graph\"></a>\x0a<strong>module\x20graph:</strong>\x20The\x20directed\x20graph\x20of\x20module\x20requirements,\x20rooted\x20at\x20the\x20<a\x20href=\"#glos-main-module\">main\x0amodule</a>.\x20Each\x20vertex\x20in\x20the\x20graph\x20is\x20a\x20module;\x20each\x20edge\x20is\x20a\x0aversion\x20from\x20a\x20<code>require</code>\x20statement\x20in\x20a\x20<code>go.mod</code>\x20file\x20(subject\x20to\x20<code>replace</code>\x20and\x0a<code>exclude</code>\x20statements\x20in\x20the\x20main\x20module's\x20<code>go.mod</code>\x20file.</p>\x0a<p><a\x20id=\"glos-module-path\"></a>\x0a<strong>module\x20path:</strong>\x20A\x20path\x20that\x20identifies\x20a\x20module\x20and\x20acts\x20as\x20a\x20prefix\x20for\x0apackage\x20import\x20paths\x20within\x20the\x20module.\x20For\x20example,\x20<code>&quot;golang.org/x/net&quot;</code>.</p>\x0a<p><a\x20id=\"glos-module-proxy\"></a>\x0a<strong>module\x20proxy:</strong>\x20A\x20web\x20server\x20that\x20implements\x20the\x20<a\x20href=\"#goproxy-protocol\"><code>GOPROXY</code>\x0aprotocol</a>.\x20The\x20<code>go</code>\x20command\x20downloads\x20version\x20information,\x0a<code>go.mod</code>\x20files,\x20and\x20module\x20zip\x20files\x20from\x20module\x20proxies.</p>\x0a<p><a\x20id=\"glos-module-root-directory\"></a>\x0a<strong>module\x20root\x20directory:</strong>\x20The\x20directory\x20that\x20contains\x20the\x20<code>go.mod</code>\x20file\x20that\x0adefines\x20a\x20module.</p>\x0a<p><a\x20id=\"glos-package\"></a>\x0a<strong>package:</strong>\x20A\x20collection\x20of\x20source\x20files\x20in\x20the\x20same\x20directory\x20that\x20are\x0acompiled\x20together.\x20See\x20the\x20<a\x20href=\"/ref/spec#Packages\">Packages\x20section</a>\x20in\x20the\x20Go\x0aLanguage\x20Specification.</p>\x0a<p><a\x20id=\"glos-package-path\"></a>\x0a<strong>package\x20path:</strong>\x20The\x20path\x20that\x20uniquely\x20identifies\x20a\x20package.\x20A\x20package\x20path\x20is\x0aa\x20<a\x20href=\"#glos-module-path\">module\x20path</a>\x20joined\x20with\x20a\x20subdirectory\x20within\x20the\x20module.\x0aFor\x20example\x20<code>&quot;golang.org/x/net/html&quot;</code>\x20is\x20the\x20package\x20path\x20for\x20the\x20package\x20in\x20the\x0amodule\x20<code>&quot;golang.org/x/net&quot;</code>\x20in\x20the\x20<code>&quot;html&quot;</code>\x20subdirectory.\x20Synonym\x20of\x0a<a\x20href=\"#glos-import-path\">import\x20path</a>.</p>\x0a<p><a\x20id=\"glos-patch-version\"></a>\x0a<strong>patch\x20version:</strong>\x20The\x20third\x20number\x20in\x20a\x20semantic\x20version\x20(<code>3</code>\x20in\x20<code>v1.2.3</code>).\x20In\x0aa\x20release\x20with\x20no\x20changes\x20to\x20the\x20module's\x20public\x20interface,\x20the\x20patch\x20version\x0amust\x20be\x20incremented.</p>\x0a<p><a\x20id=\"glos-pre-release-version\"></a>\x0a<strong>pre-release\x20version:</strong>\x20A\x20version\x20with\x20a\x20dash\x20followed\x20by\x20a\x20series\x20of\x0adot-separated\x20identifiers\x20immediately\x20following\x20the\x20patch\x20version,\x20for\x20example,\x0a<code>v1.2.3-beta4</code>.\x20Pre-release\x20versions\x20are\x20considered\x20unstable\x20and\x20are\x20not\x0aassumed\x20to\x20be\x20compatible\x20with\x20other\x20versions.\x20A\x20pre-release\x20version\x20sorts\x20before\x0athe\x20corresponding\x20release\x20version:\x20<code>v1.2.3-pre</code>\x20comes\x20before\x20<code>v1.2.3</code>.\x20See\x20also\x0a<a\x20href=\"#glos-release-version\">release\x20version</a>.</p>\x0a<p><a\x20id=\"glos-pseudo-version\"></a>\x0a<strong>pseudo-version:</strong>\x20A\x20version\x20that\x20encodes\x20a\x20revision\x20identifier\x20(such\x20as\x20a\x20Git\x0acommit\x20hash)\x20and\x20a\x20timestamp\x20from\x20a\x20version\x20control\x20system.\x20For\x20example,\x0a<code>v0.0.0-20191109021931-daa7c04131f5</code>.\x20Used\x20for\x20<a\x20href=\"#non-module-compat\">compatibility\x20with\x20non-module\x0arepositories</a>\x20and\x20in\x20other\x20situations\x20when\x20a\x20tagged\x0aversion\x20is\x20not\x20available.</p>\x0a<p><a\x20id=\"glos-release-version\"></a>\x0a<strong>release\x20version:</strong>\x20A\x20version\x20without\x20a\x20pre-release\x20suffix.\x20For\x20example,\x0a<code>v1.2.3</code>,\x20not\x20<code>v1.2.3-pre</code>.\x20See\x20also\x20<a\x20href=\"#glos-pre-release-version\">pre-release\x0aversion</a>.</p>\x0a<p><a\x20id=\"glos-version\"></a>\x0a<strong>version:</strong>\x20An\x20identifier\x20for\x20an\x20immutable\x20snapshot\x20of\x20a\x20module,\x20written\x20as\x20the\x0aletter\x20<code>v</code>\x20followed\x20by\x20a\x20semantic\x20version.\x20See\x20the\x20section\x20on\x0a<a\x20href=\"#versions\">Versions</a>.</p>\x0a",
 }
diff --git a/content/static/style.css b/content/static/style.css
index 912e4fb..d8f6b73 100644
--- a/content/static/style.css
+++ b/content/static/style.css
@@ -255,25 +255,25 @@
 
 /* Style download button on doc/install page */
 a#start {
-    background: #E0EBF5;
-    border: 0.0625rem solid #375EAB;
-    border-radius: 0.3125rem;
-    color: #222;
-    display: block;
-    padding: 0.625rem;
-    text-align: center;
-    text-decoration: none;
+  background: #e0ebf5;
+  border: 0.0625rem solid #375eab;
+  border-radius: 0.3125rem;
+  color: #222;
+  display: block;
+  padding: 0.625rem;
+  text-align: center;
+  text-decoration: none;
 }
 a#start .big {
-    display: block;
-    font-size: 1.25rem;
-    font-weight: bold;
+  display: block;
+  font-size: 1.25rem;
+  font-weight: bold;
 }
 a#start .desc {
-    display: block;
-    font-size: 0.875rem;
-    font-weight: normal;
-    margin-top: 0.3125rem;
+  display: block;
+  font-size: 0.875rem;
+  font-weight: normal;
+  margin-top: 0.3125rem;
 }
 
 .download {