// Copyright 2017 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Package main contains an App Engine that serves vanity URLs for a git repo.
package main
import (
"fmt"
"html/template"
"log"
"net/http"
"os"
"strings"
)
type pkg struct {
Import string
Repo string
Display string
CurrentPkg string
}
var (
domain string
repo string
display string
)
func init() {
mustLoad("DOMAIN", &domain)
mustLoad("REPO", &repo)
if strings.Contains(repo, "github.com") {
display = fmt.Sprintf("%v %v/tree/master{/dir} %v/blob/master{/dir}/{file}#L{line}", repo, repo, repo)
}
if display == "" {
mustLoad("DISPLAY", &display)
}
http.HandleFunc("/", handle)
}
func handle(w http.ResponseWriter, r *http.Request) {
current := r.URL.Path
if err := vanityTmpl.Execute(w, &pkg{
Import: domain,
Repo: repo,
Display: display,
CurrentPkg: current,
}); err != nil {
http.Error(w, "cannot render the page", http.StatusInternalServerError)
}
}
var vanityTmpl, _ = template.New("vanity").Parse(`
Nothing to see here; move along.
`)
func mustLoad(key string, value *string) {
v := os.Getenv(key)
if v == "" {
log.Fatalf("missing %v env variable", key)
}
*value = v
}