cmd/gopls/integration: remove old VS Code extension for debugging

I have moved this extension out of this repository and into
https://github.com/stamblerre/gopls-debug. It is now published in the VS
Code marketplace. We weren't really doing anything with this, so there's
no need to keep it in this repo. Future integration-related code should
live in golang.org/x/tools/gopls/integration.

Change-Id: Id01e1d55d141a7305fa688a72f8c9ccbee0e28c1
Reviewed-on: https://go-review.googlesource.com/c/tools/+/208997
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
Reviewed-by: Ian Cottrell <iancottrell@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
diff --git a/cmd/gopls/integration/vscode/.gitignore b/cmd/gopls/integration/vscode/.gitignore
deleted file mode 100644
index 4c81da5..0000000
--- a/cmd/gopls/integration/vscode/.gitignore
+++ /dev/null
@@ -1,3 +0,0 @@
-gopls*.vsix
-out
-node_modules
diff --git a/cmd/gopls/integration/vscode/.vscode/launch.json b/cmd/gopls/integration/vscode/.vscode/launch.json
deleted file mode 100644
index 72fa176..0000000
--- a/cmd/gopls/integration/vscode/.vscode/launch.json
+++ /dev/null
@@ -1,20 +0,0 @@
-{
-    "version": "0.2.0",
-    "configurations": [
-        {
-            "name": "Launch Extension",
-            "type": "extensionHost",
-            "request": "launch",
-            "runtimeExecutable": "${execPath}",
-            "args": [
-                "--extensionDevelopmentPath=${workspaceFolder}"
-            ],
-            "stopOnEntry": false,
-            "sourceMaps": true,
-            "outFiles": [
-                "${workspaceFolder}/out/**/*.js"
-            ],
-            "preLaunchTask": "npm"
-        },
-    ]
-}
\ No newline at end of file
diff --git a/cmd/gopls/integration/vscode/.vscode/tasks.json b/cmd/gopls/integration/vscode/.vscode/tasks.json
deleted file mode 100644
index cc8f2dd..0000000
--- a/cmd/gopls/integration/vscode/.vscode/tasks.json
+++ /dev/null
@@ -1,29 +0,0 @@
-// Available variables which can be used inside of strings.
-// ${workspaceFolder}: the root folder of the team
-// ${file}: the current opened file
-// ${fileBasename}: the current opened file's basename
-// ${fileDirname}: the current opened file's dirname
-// ${fileExtname}: the current opened file's extension
-// ${cwd}: the current working directory of the spawned process
-// A task runner that calls the Typescript compiler (tsc) and
-// compiles the extension.
-{
-    "version": "2.0.0",
-    // we want to run npm
-    "command": "npm",
-    // the command is a shell script
-    "type": "shell",
-    // show the output window only if unrecognized errors occur.
-    "presentation": {
-        "reveal": "silent"
-    },
-    // we run the custom script "compile" as defined in package.json
-    "args": [
-        "run",
-        "compile"
-    ],
-    // The tsc compiler is started in watching mode
-    "isBackground": true,
-    // use the standard tsc in watch mode problem matcher to find compile problems in the output.
-    "problemMatcher": "$tsc-watch"
-}
\ No newline at end of file
diff --git a/cmd/gopls/integration/vscode/README.md b/cmd/gopls/integration/vscode/README.md
deleted file mode 100644
index d3b7deb..0000000
--- a/cmd/gopls/integration/vscode/README.md
+++ /dev/null
@@ -1,21 +0,0 @@
-# gopls testing extension
-
-An extension for debugging the Go Language Server provided by 
-https://golang.org/x/tools/cmd/gopls. The code for this extension comes from
-a combination of 
-https://github.com/Microsoft/vscode-extension-samples/blob/master/lsp-sample
-and https://github.com/Microsoft/vscode-go. 
-
-## Features
-
-* Diagnostics (on file change)
-* Completion (Ctrl + Space)
-* Jump to definition (F12 or right-click -> Go to Definition)
-* Signature help (Ctrl + Shift + Space)
-
-## Installation
-
-To package the extension, run `vsce package` from this directory. To install
-the extension, navigate to the "Extensions" panel in VSCode, and select
-"Install from VSIX..." from the menu in the top right corner. Choose the 
-`gopls-1.0.0.vsix file` and reload VSCode.
diff --git a/cmd/gopls/integration/vscode/package-lock.json b/cmd/gopls/integration/vscode/package-lock.json
deleted file mode 100644
index 14b934c..0000000
--- a/cmd/gopls/integration/vscode/package-lock.json
+++ /dev/null
@@ -1,2065 +0,0 @@
-{
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-    "version": "1.0.0",
-    "lockfileVersion": 1,
-    "requires": true,
-    "dependencies": {
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-            "dev": true
-        },
-        "@types/node": {
-            "version": "8.10.39",
-            "resolved": "https://registry.npmjs.org/@types/node/-/node-8.10.39.tgz",
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-            "dev": true
-        },
-        "ajv": {
-            "version": "6.6.1",
-            "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.6.1.tgz",
-            "integrity": "sha512-ZoJjft5B+EJBjUyu9C9Hc0OZyPZSSlOF+plzouTrg6UlA8f+e/n8NIgBFG/9tppJtpPWfthHakK7juJdNDODww==",
-            "dev": true,
-            "requires": {
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-                "fast-json-stable-stringify": "^2.0.0",
-                "json-schema-traverse": "^0.4.1",
-                "uri-js": "^4.2.2"
-            }
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-        "ansi-cyan": {
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-            "resolved": "https://registry.npmjs.org/ansi-cyan/-/ansi-cyan-0.1.1.tgz",
-            "integrity": "sha1-U4rlKK+JgvKK4w2G8vF0VtJgmHM=",
-            "dev": true,
-            "requires": {
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-        "ansi-red": {
-            "version": "0.1.1",
-            "resolved": "https://registry.npmjs.org/ansi-red/-/ansi-red-0.1.1.tgz",
-            "integrity": "sha1-jGOPnRCAgAo1PJwoyKgcpHBdlGw=",
-            "dev": true,
-            "requires": {
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-        "ansi-regex": {
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-            "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-2.1.1.tgz",
-            "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8=",
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diff --git a/cmd/gopls/integration/vscode/package.json b/cmd/gopls/integration/vscode/package.json
deleted file mode 100644
index 0281e09..0000000
--- a/cmd/gopls/integration/vscode/package.json
+++ /dev/null
@@ -1,58 +0,0 @@
-{
-    "name": "gopls",
-    "description": "Go Language Server Client for testing",
-    "author": "The Go authors",
-    "license": "SEE LICENSE IN ../../../../LICENSE",
-    "version": "1.0.0",
-    "repository": {
-        "type": "git",
-        "url": "https://golang.org/x/tools"
-    },
-    "publisher": "golang",
-    "engines": {
-        "vscode": "^1.23.0"
-    },
-    "activationEvents": [
-        "onLanguage:go"
-    ],
-    "main": "./out/extension",
-    "scripts": {
-        "vscode:prepublish": "tsc -p ./",
-        "compile": "tsc -watch -p ./",
-        "postinstall": "node ./node_modules/vscode/bin/install",
-        "lint": "node ./node_modules/tslint/bin/tslint ./src/*.ts"
-    },
-    "extensionDependencies": [],
-    "dependencies": {
-        "vscode-languageclient": "~4.3.0"
-    },
-    "devDependencies": {
-        "@types/mocha": "^5.2.5",
-        "@types/node": "^8.10.39",
-        "tslint": "^5.11.0",
-        "typescript": "^3.1.3",
-        "vscode": "^1.1.24"
-    },
-    "contributes": {
-        "configuration": {
-            "title": "gopls",
-            "properties": {
-                "gopls.flags": {
-                    "type": "array",
-                    "items": {
-                        "type": "string"
-                    },
-                    "default": [],
-                    "description": "Flags to pass to gopls",
-                    "scope": "resource"
-                },
-                "gopls.command": {
-                    "type": "string",
-                    "default": "gopls",
-                    "description": "Name of the gopls binary",
-                    "scope": "resource"
-                }
-            }
-        }
-    }
-}
diff --git a/cmd/gopls/integration/vscode/src/extension.ts b/cmd/gopls/integration/vscode/src/extension.ts
deleted file mode 100644
index 7898dc5..0000000
--- a/cmd/gopls/integration/vscode/src/extension.ts
+++ /dev/null
@@ -1,96 +0,0 @@
-// Copyright 2018 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-'use strict';
-
-import fs = require('fs');
-import lsp = require('vscode-languageclient');
-import vscode = require('vscode');
-import path = require('path');
-
-export function activate(ctx: vscode.ExtensionContext): void {
-  // The handleDiagnostics middleware writes to the diagnostics log, in order
-  // to confirm the order in which the extension received diagnostics.
-  let r = Math.floor(Math.random() * 100000000);
-  let diagnosticsLog = fs.openSync('/tmp/diagnostics' + r + '.log', 'w');
-
-  let document = vscode.window.activeTextEditor.document;
-  let config = vscode.workspace.getConfiguration('gopls', document.uri);
-  let goplsCommand: string = config['command'];
-  let goplsFlags: string[] = config['flags'];
-  let serverOptions:
-      lsp.ServerOptions = {command: getBinPath(goplsCommand), args: goplsFlags};
-  let clientOptions: lsp.LanguageClientOptions = {
-    initializationOptions: {},
-    documentSelector: ['go'],
-    uriConverters: {
-      code2Protocol: (uri: vscode.Uri): string =>
-          (uri.scheme ? uri : uri.with({scheme: 'file'})).toString(),
-      protocol2Code: (uri: string) => vscode.Uri.parse(uri),
-    },
-    middleware: {
-      handleDiagnostics: (uri: vscode.Uri, diagnostics: vscode.Diagnostic[], next: lsp.HandleDiagnosticsSignature) => {
-        let diagString = "-------------------------------------------\n";
-        diagString += uri.toString(); + ": " + diagnostics.length + "\n";
-        if (diagnostics.length > 0) {
-          diagString += "\n";
-          for (const diag of diagnostics) {
-            diagString += diag.message + "\n";
-          }
-        }
-        fs.writeSync(diagnosticsLog, diagString);
-        return next(uri, diagnostics);
-      }
-    },
-    revealOutputChannelOn: lsp.RevealOutputChannelOn.Never,
-  };
-  const c = new lsp.LanguageClient('gopls', serverOptions, clientOptions);
-  c.onReady().then(() => {
-    const capabilities = c.initializeResult && c.initializeResult.capabilities;
-    if (!capabilities) {
-      return vscode.window.showErrorMessage(
-          'The language server is not able to serve any features at the moment.');
-    }
-  });
-  ctx.subscriptions.push(c.start());
-}
-
-function getBinPath(toolName: string): string {
-  toolName = correctBinname(toolName);
-  let tool = findToolIn(toolName, 'PATH', false);
-  if (tool) {
-    return tool;
-  }
-  return findToolIn(toolName, 'GOPATH', true);
-}
-
-function findToolIn(
-    toolName: string, envVar: string, appendBinToPath: boolean): string {
-  let value = process.env[envVar];
-  if (value) {
-    let paths = value.split(path.delimiter);
-    for (let i = 0; i < paths.length; i++) {
-      let binpath = path.join(paths[i], appendBinToPath ? 'bin' : '', toolName);
-      if (fileExists(binpath)) {
-        return binpath;
-      }
-    }
-  }
-  return null;
-}
-
-function fileExists(filePath: string): boolean {
-  try {
-    return fs.statSync(filePath).isFile();
-  } catch (e) {
-    return false;
-  }
-}
-
-function correctBinname(toolName: string) {
-  if (process.platform === 'win32')
-    return toolName + '.exe';
-  else
-    return toolName;
-}
\ No newline at end of file
diff --git a/cmd/gopls/integration/vscode/tsconfig.json b/cmd/gopls/integration/vscode/tsconfig.json
deleted file mode 100644
index ebf7e64..0000000
--- a/cmd/gopls/integration/vscode/tsconfig.json
+++ /dev/null
@@ -1,15 +0,0 @@
-{
-    "compilerOptions": {
-        "module": "commonjs",
-        "target": "es6",
-        "outDir": "out",
-        "rootDir": "src",
-        "lib": [
-            "es6"
-        ],
-        "sourceMap": true
-    },
-    "exclude": [
-        "node_modules"
-    ]
-}
\ No newline at end of file
diff --git a/cmd/gopls/integration/vscode/tslint.json b/cmd/gopls/integration/vscode/tslint.json
deleted file mode 100644
index 4633104..0000000
--- a/cmd/gopls/integration/vscode/tslint.json
+++ /dev/null
@@ -1,12 +0,0 @@
-{
-    "rules": {
-        "indent": [
-            true,
-            "tabs"
-        ],
-        "semicolon": [
-            true,
-            "always"
-        ]
-    }
-}
\ No newline at end of file