101 lines
2.4 KiB
Go
101 lines
2.4 KiB
Go
// Copyright 2017 Google Inc. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Package main contains an App Engine that serves vanity URLs for a git repo.
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package main
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import (
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"fmt"
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"html/template"
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"log"
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"net/http"
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"os"
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"strings"
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"google.golang.org/appengine"
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"io/ioutil"
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"gopkg.in/yaml.v2"
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)
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type ypkg struct {
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Repo string `yaml:"repo,omitempty"`
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Display string `yaml:"display,omitempty"`
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}
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var m map[string]ypkg
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func init() {
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vanity, err := ioutil.ReadFile("./vanity.yaml")
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if err != nil {
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log.Fatal(err)
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}
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if err := yaml.Unmarshal(vanity, &m); err != nil {
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log.Fatal(err)
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}
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for _, e := range m {
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if e.Display != "" {
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continue
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}
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if strings.Contains(e.Repo, "github.com") {
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e.Display = fmt.Sprintf("%v %v/tree/master{/dir} %v/blob/master{/dir}/{file}#L{line}", e.Repo, e.Repo, e.Repo)
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}
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}
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http.HandleFunc("/", handle)
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}
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func handle(w http.ResponseWriter, r *http.Request) {
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current := r.URL.Path
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p, ok := m[current]
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if !ok {
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http.NotFound(w, r)
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return
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}
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host := appengine.DefaultVersionHostname(appengine.NewContext(r))
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if err := vanityTmpl.Execute(w, struct {
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Import string
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Repo string
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Display string
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}{
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Import: host + current,
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Repo: p.Repo,
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Display: p.Display,
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}); err != nil {
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http.Error(w, "cannot render the page", http.StatusInternalServerError)
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}
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}
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var vanityTmpl, _ = template.New("vanity").Parse(`<!DOCTYPE html>
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
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<meta name="go-import" content="{{.Import}} git {{.Repo}}">
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<meta name="go-source" content="{{.Import}} {{.Display}}">
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<meta http-equiv="refresh" content="0; url=https://godoc.org/{{.Import}}">
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</head>
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<body>
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Nothing to see here; <a href="https://godoc.org/{{.Import}}">see the package on godoc</a>.
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</body>
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</html>`)
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func mustLoad(key string, value *string) {
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v := os.Getenv(key)
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if v == "" {
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log.Fatalf("missing %v env variable", key)
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}
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*value = v
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}
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