Merge branch 'jk/list-objects-optim-wo-trees'
[git/git.git] / contrib / persistent-https / main.go
1 // Copyright 2012 Google Inc. All Rights Reserved.
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 // The git-remote-persistent-https binary speeds up SSL operations by running
16 // a daemon job that keeps a connection open to a Git server. This ensures the
17 // git-remote-persistent-https--proxy is running and delegating execution
18 // to the git-remote-http binary with the http_proxy set to the daemon job.
19 // A unix socket is used to authenticate the proxy and discover the
20 // HTTP address. Note, both the client and proxy are included in the same
21 // binary.
22 package main
23
24 import (
25 "flag"
26 "fmt"
27 "log"
28 "os"
29 "strings"
30 "time"
31 )
32
33 var (
34 forceProxy = flag.Bool("proxy", false, "Whether to start the binary in proxy mode")
35 proxyBin = flag.String("proxy_bin", "git-remote-persistent-https--proxy", "Path to the proxy binary")
36 printLabel = flag.Bool("print_label", false, "Prints the build label for the binary")
37
38 // Variable that should be defined through the -X linker flag.
39 _BUILD_EMBED_LABEL string
40 )
41
42 const (
43 defaultMaxIdleDuration = 24 * time.Hour
44 defaultPollUpdateInterval = 15 * time.Minute
45 )
46
47 func main() {
48 flag.Parse()
49 if *printLabel {
50 // Short circuit execution to print the build label
51 fmt.Println(buildLabel())
52 return
53 }
54
55 var err error
56 if *forceProxy || strings.HasSuffix(os.Args[0], "--proxy") {
57 log.SetPrefix("git-remote-persistent-https--proxy: ")
58 proxy := &Proxy{
59 BuildLabel: buildLabel(),
60 MaxIdleDuration: defaultMaxIdleDuration,
61 PollUpdateInterval: defaultPollUpdateInterval,
62 }
63 err = proxy.Run()
64 } else {
65 log.SetPrefix("git-remote-persistent-https: ")
66 client := &Client{
67 ProxyBin: *proxyBin,
68 Args: flag.Args(),
69 }
70 err = client.Run()
71 }
72 if err != nil {
73 log.Fatalln(err)
74 }
75 }
76
77 func buildLabel() string {
78 if _BUILD_EMBED_LABEL == "" {
79 log.Println(`unlabeled build; build with "make" to label`)
80 }
81 return _BUILD_EMBED_LABEL
82 }