internal/godoc/redirect: remove unused package
Change-Id: I671c64ff191520395bb68430a51dab73cc9e0a30
Reviewed-on: https://go-review.googlesource.com/c/website/+/293424
Trust: Russ Cox <rsc@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
diff --git a/internal/godoc/redirect/hash.go b/internal/godoc/redirect/hash.go
deleted file mode 100644
index d5a1e3e..0000000
--- a/internal/godoc/redirect/hash.go
+++ /dev/null
@@ -1,138 +0,0 @@
-// Copyright 2014 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.
-
-// This file provides a compact encoding of
-// a map of Mercurial hashes to Git hashes.
-
-package redirect
-
-import (
- "encoding/binary"
- "fmt"
- "io"
- "os"
- "sort"
- "strconv"
- "strings"
-)
-
-// hashMap is a map of Mercurial hashes to Git hashes.
-type hashMap struct {
- file *os.File
- entries int
-}
-
-// newHashMap takes a file handle that contains a map of Mercurial to Git
-// hashes. The file should be a sequence of pairs of little-endian encoded
-// uint32s, representing a hgHash and a gitHash respectively.
-// The sequence must be sorted by hgHash.
-// The file must remain open for as long as the returned hashMap is used.
-func newHashMap(f *os.File) (*hashMap, error) {
- fi, err := f.Stat()
- if err != nil {
- return nil, err
- }
- return &hashMap{file: f, entries: int(fi.Size() / 8)}, nil
-}
-
-// Lookup finds an hgHash in the map that matches the given prefix, and returns
-// its corresponding gitHash. The prefix must be at least 8 characters long.
-func (m *hashMap) Lookup(s string) gitHash {
- if m == nil {
- return 0
- }
- hg, err := hgHashFromString(s)
- if err != nil {
- return 0
- }
- var git gitHash
- b := make([]byte, 8)
- sort.Search(m.entries, func(i int) bool {
- n, err := m.file.ReadAt(b, int64(i*8))
- if err != nil {
- panic(err)
- }
- if n != 8 {
- panic(io.ErrUnexpectedEOF)
- }
- v := hgHash(binary.LittleEndian.Uint32(b[:4]))
- if v == hg {
- git = gitHash(binary.LittleEndian.Uint32(b[4:]))
- }
- return v >= hg
- })
- return git
-}
-
-// hgHash represents the lower (leftmost) 32 bits of a Mercurial hash.
-type hgHash uint32
-
-func (h hgHash) String() string {
- return intToHash(int64(h))
-}
-
-func hgHashFromString(s string) (hgHash, error) {
- if len(s) < 8 {
- return 0, fmt.Errorf("string too small: len(s) = %d", len(s))
- }
- hash := s[:8]
- i, err := strconv.ParseInt(hash, 16, 64)
- if err != nil {
- return 0, err
- }
- return hgHash(i), nil
-}
-
-// gitHash represents the leftmost 28 bits of a Git hash in its upper 28 bits,
-// and it encodes hash's repository in the lower 4 bits.
-type gitHash uint32
-
-func (h gitHash) Hash() string {
- return intToHash(int64(h))[:7]
-}
-
-func (h gitHash) Repo() string {
- return repo(h & 0xF).String()
-}
-
-func intToHash(i int64) string {
- s := strconv.FormatInt(i, 16)
- if len(s) < 8 {
- s = strings.Repeat("0", 8-len(s)) + s
- }
- return s
-}
-
-// repo represents a Go Git repository.
-type repo byte
-
-const (
- repoGo repo = iota
- repoBlog
- repoCrypto
- repoExp
- repoImage
- repoMobile
- repoNet
- repoSys
- repoTalks
- repoText
- repoTools
-)
-
-func (r repo) String() string {
- return map[repo]string{
- repoGo: "go",
- repoBlog: "blog",
- repoCrypto: "crypto",
- repoExp: "exp",
- repoImage: "image",
- repoMobile: "mobile",
- repoNet: "net",
- repoSys: "sys",
- repoTalks: "talks",
- repoText: "text",
- repoTools: "tools",
- }[r]
-}
diff --git a/internal/godoc/redirect/redirect.go b/internal/godoc/redirect/redirect.go
deleted file mode 100644
index 059d264..0000000
--- a/internal/godoc/redirect/redirect.go
+++ /dev/null
@@ -1,324 +0,0 @@
-// Copyright 2013 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.
-
-// Package redirect provides hooks to register HTTP handlers that redirect old
-// godoc paths to their new equivalents and assist in accessing the issue
-// tracker, wiki, code review system, etc.
-package redirect // import "golang.org/x/website/internal/godoc/redirect"
-
-import (
- "context"
- "fmt"
- "html/template"
- "net/http"
- "os"
- "regexp"
- "strconv"
- "strings"
- "sync"
- "time"
-
- "golang.org/x/net/context/ctxhttp"
-)
-
-// Register registers HTTP handlers that redirect old godoc paths to their new
-// equivalents and assist in accessing the issue tracker, wiki, code review
-// system, etc. If mux is nil it uses http.DefaultServeMux.
-func Register(mux *http.ServeMux) {
- if mux == nil {
- mux = http.DefaultServeMux
- }
- handlePathRedirects(mux, pkgRedirects, "/pkg/")
- handlePathRedirects(mux, cmdRedirects, "/cmd/")
- for prefix, redirect := range prefixHelpers {
- p := "/" + prefix + "/"
- mux.Handle(p, PrefixHandler(p, redirect))
- }
- for path, redirect := range redirects {
- mux.Handle(path, Handler(redirect))
- }
- // NB: /src/pkg (sans trailing slash) is the index of packages.
- mux.HandleFunc("/src/pkg/", srcPkgHandler)
- mux.HandleFunc("/cl/", clHandler)
- mux.HandleFunc("/change/", changeHandler)
- mux.HandleFunc("/design/", designHandler)
-}
-
-func handlePathRedirects(mux *http.ServeMux, redirects map[string]string, prefix string) {
- for source, target := range redirects {
- h := Handler(prefix + target + "/")
- p := prefix + source
- mux.Handle(p, h)
- mux.Handle(p+"/", h)
- }
-}
-
-// Packages that were renamed between r60 and go1.
-var pkgRedirects = map[string]string{
- "asn1": "encoding/asn1",
- "big": "math/big",
- "cmath": "math/cmplx",
- "csv": "encoding/csv",
- "exec": "os/exec",
- "exp/template/html": "html/template",
- "gob": "encoding/gob",
- "http": "net/http",
- "http/cgi": "net/http/cgi",
- "http/fcgi": "net/http/fcgi",
- "http/httptest": "net/http/httptest",
- "http/pprof": "net/http/pprof",
- "json": "encoding/json",
- "mail": "net/mail",
- "rand": "math/rand",
- "rpc": "net/rpc",
- "rpc/jsonrpc": "net/rpc/jsonrpc",
- "scanner": "text/scanner",
- "smtp": "net/smtp",
- "tabwriter": "text/tabwriter",
- "template": "text/template",
- "template/parse": "text/template/parse",
- "url": "net/url",
- "utf16": "unicode/utf16",
- "utf8": "unicode/utf8",
- "xml": "encoding/xml",
-}
-
-// Commands that were renamed between r60 and go1.
-var cmdRedirects = map[string]string{
- "gofix": "fix",
- "goinstall": "go",
- "gopack": "pack",
- "gotest": "go",
- "govet": "vet",
- "goyacc": "yacc",
-}
-
-var redirects = map[string]string{
- "/blog": "/blog/",
- "/build": "http://build.golang.org",
- "/change": "https://go.googlesource.com/go",
- "/cl": "https://go-review.googlesource.com",
- "/cmd/godoc/": "https://pkg.go.dev/golang.org/x/tools/cmd/godoc",
- "/issue": "https://github.com/golang/go/issues",
- "/issue/new": "https://github.com/golang/go/issues/new",
- "/issues": "https://github.com/golang/go/issues",
- "/issues/new": "https://github.com/golang/go/issues/new",
- "/play": "http://play.golang.org",
- "/design": "https://go.googlesource.com/proposal/+/master/design",
-
- // In Go 1.2 the references page is part of /doc/.
- "/ref": "/doc/#references",
- // This next rule clobbers /ref/spec and /ref/mem.
- // TODO(adg): figure out what to do here, if anything.
- // "/ref/": "/doc/#references",
-
- // Be nice to people who are looking in the wrong place.
- "/doc/mem": "/ref/mem",
- "/doc/spec": "/ref/spec",
-
- "/talks": "http://talks.golang.org",
- "/tour": "http://tour.golang.org",
- "/wiki": "https://github.com/golang/go/wiki",
-
- "/doc/articles/c_go_cgo.html": "/blog/c-go-cgo",
- "/doc/articles/concurrency_patterns.html": "/blog/go-concurrency-patterns-timing-out-and",
- "/doc/articles/defer_panic_recover.html": "/blog/defer-panic-and-recover",
- "/doc/articles/error_handling.html": "/blog/error-handling-and-go",
- "/doc/articles/gobs_of_data.html": "/blog/gobs-of-data",
- "/doc/articles/godoc_documenting_go_code.html": "/blog/godoc-documenting-go-code",
- "/doc/articles/gos_declaration_syntax.html": "/blog/gos-declaration-syntax",
- "/doc/articles/image_draw.html": "/blog/go-imagedraw-package",
- "/doc/articles/image_package.html": "/blog/go-image-package",
- "/doc/articles/json_and_go.html": "/blog/json-and-go",
- "/doc/articles/json_rpc_tale_of_interfaces.html": "/blog/json-rpc-tale-of-interfaces",
- "/doc/articles/laws_of_reflection.html": "/blog/laws-of-reflection",
- "/doc/articles/slices_usage_and_internals.html": "/blog/go-slices-usage-and-internals",
- "/doc/go_for_cpp_programmers.html": "/wiki/GoForCPPProgrammers",
- "/doc/go_tutorial.html": "http://tour.golang.org/",
-}
-
-var prefixHelpers = map[string]string{
- "issue": "https://github.com/golang/go/issues/",
- "issues": "https://github.com/golang/go/issues/",
- "play": "http://play.golang.org/",
- "talks": "http://talks.golang.org/",
- "wiki": "https://github.com/golang/go/wiki/",
-}
-
-func Handler(target string) http.Handler {
- return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
- url := target
- if qs := r.URL.RawQuery; qs != "" {
- url += "?" + qs
- }
- http.Redirect(w, r, url, http.StatusMovedPermanently)
- })
-}
-
-var validID = regexp.MustCompile(`^[A-Za-z0-9-]*/?$`)
-
-func PrefixHandler(prefix, baseURL string) http.Handler {
- return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
- if p := r.URL.Path; p == prefix {
- // redirect /prefix/ to /prefix
- http.Redirect(w, r, p[:len(p)-1], http.StatusFound)
- return
- }
- id := r.URL.Path[len(prefix):]
- if !validID.MatchString(id) {
- http.Error(w, "Not found", http.StatusNotFound)
- return
- }
- target := baseURL + id
- http.Redirect(w, r, target, http.StatusFound)
- })
-}
-
-// Redirect requests from the old "/src/pkg/foo" to the new "/src/foo".
-// See http://golang.org/s/go14nopkg
-func srcPkgHandler(w http.ResponseWriter, r *http.Request) {
- r.URL.Path = "/src/" + r.URL.Path[len("/src/pkg/"):]
- http.Redirect(w, r, r.URL.String(), http.StatusMovedPermanently)
-}
-
-func clHandler(w http.ResponseWriter, r *http.Request) {
- const prefix = "/cl/"
- if p := r.URL.Path; p == prefix {
- // redirect /prefix/ to /prefix
- http.Redirect(w, r, p[:len(p)-1], http.StatusFound)
- return
- }
- id := r.URL.Path[len(prefix):]
- // support /cl/152700045/, which is used in commit 0edafefc36.
- id = strings.TrimSuffix(id, "/")
- if !validID.MatchString(id) {
- http.Error(w, "Not found", http.StatusNotFound)
- return
- }
- target := ""
-
- if n, err := strconv.Atoi(id); err == nil && isRietveldCL(n) {
- // Issue 28836: if this Rietveld CL happens to
- // also be a Gerrit CL, render a disambiguation HTML
- // page with two links instead. We need to make a
- // Gerrit API call to figure that out, but we cache
- // known Gerrit CLs so it's done at most once per CL.
- if ok, err := isGerritCL(r.Context(), n); err == nil && ok {
- w.Header().Set("Content-Type", "text/html; charset=utf-8")
- clDisambiguationHTML.Execute(w, n)
- return
- }
-
- target = "https://codereview.appspot.com/" + id
- } else {
- target = "https://go-review.googlesource.com/" + id
- }
- http.Redirect(w, r, target, http.StatusFound)
-}
-
-var clDisambiguationHTML = template.Must(template.New("").Parse(`<!DOCTYPE html>
-<html lang="en">
- <head>
- <title>Go CL {{.}} Disambiguation</title>
- <meta name="viewport" content="width=device-width">
- </head>
- <body>
- CL number {{.}} exists in both Gerrit (the current code review system)
- and Rietveld (the previous code review system). Please make a choice:
-
- <ul>
- <li><a href="https://go-review.googlesource.com/{{.}}">Gerrit CL {{.}}</a></li>
- <li><a href="https://codereview.appspot.com/{{.}}">Rietveld CL {{.}}</a></li>
- </ul>
- </body>
-</html>`))
-
-// isGerritCL reports whether a Gerrit CL with the specified numeric change ID (e.g., "4247")
-// is known to exist by querying the Gerrit API at https://go-review.googlesource.com.
-// isGerritCL uses gerritCLCache as a cache of Gerrit CL IDs that exist.
-func isGerritCL(ctx context.Context, id int) (bool, error) {
- // Check cache first.
- gerritCLCache.Lock()
- ok := gerritCLCache.exist[id]
- gerritCLCache.Unlock()
- if ok {
- return true, nil
- }
-
- // Query the Gerrit API Get Change endpoint, as documented at
- // https://gerrit-review.googlesource.com/Documentation/rest-api-changes.html#get-change.
- ctx, cancel := context.WithTimeout(ctx, 5*time.Second)
- defer cancel()
- resp, err := ctxhttp.Get(ctx, nil, fmt.Sprintf("https://go-review.googlesource.com/changes/%d", id))
- if err != nil {
- return false, err
- }
- resp.Body.Close()
- switch resp.StatusCode {
- case http.StatusOK:
- // A Gerrit CL with this ID exists. Add it to cache.
- gerritCLCache.Lock()
- gerritCLCache.exist[id] = true
- gerritCLCache.Unlock()
- return true, nil
- case http.StatusNotFound:
- // A Gerrit CL with this ID doesn't exist. It may get created in the future.
- return false, nil
- default:
- return false, fmt.Errorf("unexpected status code: %v", resp.Status)
- }
-}
-
-var gerritCLCache = struct {
- sync.Mutex
- exist map[int]bool // exist is a set of Gerrit CL IDs that are known to exist.
-}{exist: make(map[int]bool)}
-
-var changeMap *hashMap
-
-// LoadChangeMap loads the specified map of Mercurial to Git revisions,
-// which is used by the /change/ handler to intelligently map old hg
-// revisions to their new git equivalents.
-// It should be called before calling Register.
-// The file should remain open as long as the process is running.
-// See the implementation of this package for details.
-func LoadChangeMap(filename string) error {
- f, err := os.Open(filename)
- if err != nil {
- return err
- }
- m, err := newHashMap(f)
- if err != nil {
- return err
- }
- changeMap = m
- return nil
-}
-
-func changeHandler(w http.ResponseWriter, r *http.Request) {
- const prefix = "/change/"
- if p := r.URL.Path; p == prefix {
- // redirect /prefix/ to /prefix
- http.Redirect(w, r, p[:len(p)-1], http.StatusFound)
- return
- }
- hash := r.URL.Path[len(prefix):]
- target := "https://go.googlesource.com/go/+/" + hash
- if git := changeMap.Lookup(hash); git > 0 {
- target = fmt.Sprintf("https://go.googlesource.com/%v/+/%v", git.Repo(), git.Hash())
- }
- http.Redirect(w, r, target, http.StatusFound)
-}
-
-func designHandler(w http.ResponseWriter, r *http.Request) {
- const prefix = "/design/"
- if p := r.URL.Path; p == prefix {
- // redirect /prefix/ to /prefix
- http.Redirect(w, r, p[:len(p)-1], http.StatusFound)
- return
- }
- name := r.URL.Path[len(prefix):]
- target := "https://go.googlesource.com/proposal/+/master/design/" + name + ".md"
- http.Redirect(w, r, target, http.StatusFound)
-}
diff --git a/internal/godoc/redirect/redirect_test.go b/internal/godoc/redirect/redirect_test.go
deleted file mode 100644
index 756c0d0..0000000
--- a/internal/godoc/redirect/redirect_test.go
+++ /dev/null
@@ -1,113 +0,0 @@
-// Copyright 2015 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.
-
-package redirect
-
-import (
- "net/http"
- "net/http/httptest"
- "testing"
-)
-
-type redirectResult struct {
- status int
- path string
-}
-
-func errorResult(status int) redirectResult {
- return redirectResult{status, ""}
-}
-
-func TestRedirects(t *testing.T) {
- var tests = map[string]redirectResult{
- "/build": {301, "http://build.golang.org"},
- "/ref": {301, "/doc/#references"},
- "/doc/mem": {301, "/ref/mem"},
- "/doc/spec": {301, "/ref/spec"},
- "/tour": {301, "http://tour.golang.org"},
- "/foo": errorResult(404),
-
- "/pkg/asn1": {301, "/pkg/encoding/asn1/"},
- "/pkg/template/parse": {301, "/pkg/text/template/parse/"},
-
- "/src/pkg/foo": {301, "/src/foo"},
-
- "/cmd/gofix": {301, "/cmd/fix/"},
-
- // git commits (/change)
- // TODO: mercurial tags and LoadChangeMap.
- "/change": {301, "https://go.googlesource.com/go"},
- "/change/a": {302, "https://go.googlesource.com/go/+/a"},
-
- "/issue": {301, "https://github.com/golang/go/issues"},
- "/issue?": {301, "https://github.com/golang/go/issues"},
- "/issue/1": {302, "https://github.com/golang/go/issues/1"},
- "/issue/new": {301, "https://github.com/golang/go/issues/new"},
- "/issue/new?a=b&c=d%20&e=f": {301, "https://github.com/golang/go/issues/new?a=b&c=d%20&e=f"},
- "/issues": {301, "https://github.com/golang/go/issues"},
- "/issues/1": {302, "https://github.com/golang/go/issues/1"},
- "/issues/new": {301, "https://github.com/golang/go/issues/new"},
- "/issues/1/2/3": errorResult(404),
-
- "/wiki/foo": {302, "https://github.com/golang/go/wiki/foo"},
- "/wiki/foo/": {302, "https://github.com/golang/go/wiki/foo/"},
-
- "/design": {301, "https://go.googlesource.com/proposal/+/master/design"},
- "/design/": {302, "/design"},
- "/design/123-foo": {302, "https://go.googlesource.com/proposal/+/master/design/123-foo.md"},
- "/design/text/123-foo": {302, "https://go.googlesource.com/proposal/+/master/design/text/123-foo.md"},
-
- "/cl/1": {302, "https://go-review.googlesource.com/1"},
- "/cl/1/": {302, "https://go-review.googlesource.com/1"},
- "/cl/267120043": {302, "https://codereview.appspot.com/267120043"},
- "/cl/267120043/": {302, "https://codereview.appspot.com/267120043"},
-
- // Verify that we're using the Rietveld CL table:
- "/cl/152046": {302, "https://codereview.appspot.com/152046"},
- "/cl/152047": {302, "https://go-review.googlesource.com/152047"},
- "/cl/152048": {302, "https://codereview.appspot.com/152048"},
-
- // And verify we're using the "bigEnoughAssumeRietveld" value:
- "/cl/299999": {302, "https://go-review.googlesource.com/299999"},
- "/cl/300000": {302, "https://codereview.appspot.com/300000"},
- }
-
- mux := http.NewServeMux()
- Register(mux)
- ts := httptest.NewServer(mux)
- defer ts.Close()
-
- for path, want := range tests {
- if want.path != "" && want.path[0] == '/' {
- // All redirects are absolute.
- want.path = ts.URL + want.path
- }
-
- req, err := http.NewRequest("GET", ts.URL+path, nil)
- if err != nil {
- t.Errorf("(path: %q) unexpected error: %v", path, err)
- continue
- }
-
- resp, err := http.DefaultTransport.RoundTrip(req)
- if err != nil {
- t.Errorf("(path: %q) unexpected error: %v", path, err)
- continue
- }
-
- if resp.StatusCode != want.status {
- t.Errorf("(path: %q) got status %d, want %d", path, resp.StatusCode, want.status)
- }
-
- if want.status != 301 && want.status != 302 {
- // Not a redirect. Just check status.
- continue
- }
-
- out, _ := resp.Location()
- if got := out.String(); got != want.path {
- t.Errorf("(path: %q) got %s, want %s", path, got, want.path)
- }
- }
-}
diff --git a/internal/godoc/redirect/rietveld.go b/internal/godoc/redirect/rietveld.go
deleted file mode 100644
index 81b1094..0000000
--- a/internal/godoc/redirect/rietveld.go
+++ /dev/null
@@ -1,1093 +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.
-
-package redirect
-
-// bigEnoughAssumeRietveld is the value where CLs equal or great are
-// assumed to be on Rietveld. By including this threshold we shrink
-// the size of the table below. When Go amasses 150,000 more CLs, we'll
-// need to bump this number and regenerate the list below.
-const bigEnoughAssumeRietveld = 300000
-
-// isRietveldCL reports whether cl was a Rietveld CL number.
-func isRietveldCL(cl int) bool {
- return cl >= bigEnoughAssumeRietveld || lowRietveldCL[cl]
-}
-
-// lowRietveldCLs are the old CL numbers assigned by Rietveld code
-// review system as used by Go prior to Gerrit which are less than
-// bigEnoughAssumeRietveld.
-//
-// This list of numbers is registered with the /cl/NNNN redirect
-// handler to disambiguate which code review system a particular
-// number corresponds to. In some rare cases there may be duplicates,
-// in which case we might render an HTML choice for the user.
-//
-// To re-generate this list, run:
-//
-// $ cd $GOROOT
-// $ git log 7d7c6a9..94151eb | grep "^ https://golang.org/cl/" | perl -ne 's,^\s+https://golang.org/cl/(\d+).*$,$1,; chomp; print "$_: true,\n" if $_ < 300000' | sort -n | uniq
-//
-// Note that we ignore the x/* repos because we didn't start using
-// "subrepos" until the Rietveld CLs numbers were already 4,000,000+,
-// well above bigEnoughAssumeRietveld.
-var lowRietveldCL = map[int]bool{
- 152046: true,
- 152048: true,
- 152049: true,
- 152050: true,
- 152051: true,
- 152052: true,
- 152055: true,
- 152056: true,
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