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cmd/golangorg: generate major version list on Go project page
This change builds on what was done in CL 229081, and uses the Go release history data from internal/history package to generate the list of major Go versions on the Go project page. This way, this page doesn't need to be manually edited when major Go releases are made. For golang/go#38488. For golang/go#29205. For golang/go#29206. Change-Id: Ie0b12707d828207173a54f0a1bc6a4ef69dcedef Reviewed-on: https://go-review.googlesource.com/c/website/+/229483 Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Alexander Rakoczy <alex@golang.org>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,114 @@ | ||
| // Copyright 2020 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 main | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "fmt" | ||
| "html/template" | ||
| "log" | ||
| "net/http" | ||
| "sort" | ||
|
|
||
| "golang.org/x/tools/godoc" | ||
| "golang.org/x/tools/godoc/vfs" | ||
| "golang.org/x/website/internal/history" | ||
| ) | ||
|
|
||
| // projectHandler serves The Go Project page. | ||
| type projectHandler struct { | ||
| ReleaseHistory []MajorRelease // Pre-computed release history to display. | ||
| } | ||
|
|
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| func (h projectHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) { | ||
| const relPath = "doc/contrib.html" | ||
|
|
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| src, err := vfs.ReadFile(fs, relPath) | ||
| if err != nil { | ||
| log.Printf("reading template %s: %v", relPath, err) | ||
| pres.ServeError(w, req, relPath, err) | ||
| return | ||
| } | ||
|
|
||
| meta, src, err := extractMetadata(src) | ||
| if err != nil { | ||
| log.Printf("decoding metadata %s: %v", relPath, err) | ||
| pres.ServeError(w, req, relPath, err) | ||
| return | ||
| } | ||
| if !meta.Template { | ||
| err := fmt.Errorf("got non-template, want template") | ||
| log.Printf("unexpected metadata %s: %v", relPath, err) | ||
| pres.ServeError(w, req, relPath, err) | ||
| return | ||
| } | ||
|
|
||
| page := godoc.Page{ | ||
| Title: meta.Title, | ||
| Subtitle: meta.Subtitle, | ||
| GoogleCN: googleCN(req), | ||
| } | ||
| data := projectTemplateData{ | ||
| Major: h.ReleaseHistory, | ||
| } | ||
|
|
||
| // Evaluate as HTML template. | ||
| tmpl, err := template.New("").Parse(string(src)) | ||
| if err != nil { | ||
| log.Printf("parsing template %s: %v", relPath, err) | ||
| pres.ServeError(w, req, relPath, err) | ||
| return | ||
| } | ||
| var buf bytes.Buffer | ||
| if err := tmpl.Execute(&buf, data); err != nil { | ||
| log.Printf("executing template %s: %v", relPath, err) | ||
| pres.ServeError(w, req, relPath, err) | ||
| return | ||
| } | ||
| src = buf.Bytes() | ||
|
|
||
| page.Body = src | ||
| pres.ServePage(w, page) | ||
| } | ||
|
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||
| // sortMajorReleases returns a sorted list of major Go releases, | ||
| // suitable to be displayed on the Go project page. | ||
| func sortMajorReleases(rs map[history.GoVer]history.Release) []MajorRelease { | ||
| var major []MajorRelease | ||
| for v, r := range rs { | ||
| if !v.IsMajor() { | ||
| continue | ||
| } | ||
| major = append(major, MajorRelease{ver: v, rel: r}) | ||
| } | ||
| sort.Slice(major, func(i, j int) bool { | ||
| if major[i].ver.X != major[j].ver.X { | ||
| return major[i].ver.X > major[j].ver.X | ||
| } | ||
| return major[i].ver.Y > major[j].ver.Y | ||
| }) | ||
| return major | ||
| } | ||
|
|
||
| type projectTemplateData struct { | ||
| Major []MajorRelease | ||
| } | ||
|
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| // MajorRelease represents a major Go release entry as displayed on the Go project page. | ||
| type MajorRelease struct { | ||
| ver history.GoVer | ||
| rel history.Release | ||
| } | ||
|
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| // V returns the Go release version string, like "1.14", "1.14.1", "1.14.2", etc. | ||
| func (r MajorRelease) V() string { | ||
| return r.ver.String() | ||
| } | ||
|
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||
| // Date returns the date of the release, formatted for display on the Go project page. | ||
| func (r MajorRelease) Date() string { | ||
| d := r.rel.Date | ||
| return fmt.Sprintf("%s %d", d.Month, d.Year) | ||
| } |
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