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/*
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Copyright 2016 The Kubernetes Authors All rights reserved.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package repo
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import (
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"fmt"
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htemplate "html/template"
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"io/ioutil"
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"net/http"
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"path/filepath"
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"strings"
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"github.com/ghodss/yaml"
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"k8s.io/helm/pkg/chartutil"
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"k8s.io/helm/pkg/proto/hapi/chart"
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"k8s.io/helm/pkg/provenance"
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)
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const indexHTMLTemplate = `
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<html>
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<head>
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<title>Helm Repository</title>
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</head>
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<h1>Helm Charts Repository</h1>
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<ul>
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{{range $name, $ver := .Index.Entries}}
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<li>{{$name}}<ul>{{range $ver}}
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<li><a href="{{index .URLs 0}}">{{.Name}}-{{.Version}}</a></li>
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{{end}}</ul>
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</li>
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{{end}}
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</ul>
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<body>
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<p>Last Generated: {{.Index.Generated}}</p>
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</body>
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</html>
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`
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// RepositoryServer is an HTTP handler for serving a chart repository.
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type RepositoryServer struct {
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RepoPath string
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}
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// ServeHTTP implements the http.Handler interface.
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func (s *RepositoryServer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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uri := r.URL.Path
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switch uri {
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case "/", "/charts/", "/charts/index.html", "/charts/index":
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w.Header().Set("Content-Type", "text/html; charset=utf-8")
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s.htmlIndex(w, r)
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default:
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file := strings.TrimPrefix(uri, "/charts/")
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http.ServeFile(w, r, filepath.Join(s.RepoPath, file))
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}
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}
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// StartLocalRepo starts a web server and serves files from the given path
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func StartLocalRepo(path, address string) error {
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if address == "" {
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address = "127.0.0.1:8879"
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}
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s := &RepositoryServer{RepoPath: path}
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return http.ListenAndServe(address, s)
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}
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func (s *RepositoryServer) htmlIndex(w http.ResponseWriter, r *http.Request) {
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t := htemplate.Must(htemplate.New("index.html").Parse(indexHTMLTemplate))
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// load index
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lrp := filepath.Join(s.RepoPath, "index.yaml")
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i, err := LoadIndexFile(lrp)
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if err != nil {
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http.Error(w, err.Error(), 500)
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return
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}
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data := map[string]interface{}{
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"Index": i,
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}
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if err := t.Execute(w, data); err != nil {
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fmt.Fprintf(w, "Template error: %s", err)
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}
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}
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// AddChartToLocalRepo saves a chart in the given path and then reindexes the index file
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func AddChartToLocalRepo(ch *chart.Chart, path string) error {
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_, err := chartutil.Save(ch, path)
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if err != nil {
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return err
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}
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return Reindex(ch, path+"/index.yaml")
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}
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// Reindex adds an entry to the index file at the given path
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func Reindex(ch *chart.Chart, path string) error {
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name := ch.Metadata.Name + "-" + ch.Metadata.Version
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y, err := LoadIndexFile(path)
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if err != nil {
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return err
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}
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found := false
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for k := range y.Entries {
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if k == name {
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found = true
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break
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}
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}
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if !found {
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dig, err := provenance.DigestFile(path)
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if err != nil {
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return err
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}
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y.Add(ch.Metadata, name+".tgz", "http://127.0.0.1:8879/charts", "sha256:"+dig)
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out, err := yaml.Marshal(y)
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if err != nil {
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return err
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}
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ioutil.WriteFile(path, out, 0644)
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}
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return nil
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}
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