forgejo/serve.go

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// Copyright 2014 The Gogs Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
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package main
import (
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"bytes"
"container/list"
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"fmt"
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"io"
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"os"
"os/exec"
"strconv"
"strings"
"time"
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"github.com/codegangsta/cli"
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"github.com/gogits/gogs/modules/log"
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"github.com/gogits/git"
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"github.com/gogits/gogs/models"
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"github.com/gogits/gogs/modules/base"
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)
var (
COMMANDS_READONLY = map[string]int{
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"git-upload-pack": models.AU_WRITABLE,
"git upload-pack": models.AU_WRITABLE,
"git-upload-archive": models.AU_WRITABLE,
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}
COMMANDS_WRITE = map[string]int{
"git-receive-pack": models.AU_READABLE,
"git receive-pack": models.AU_READABLE,
}
)
var CmdServ = cli.Command{
Name: "serv",
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Usage: "This command just should be called by ssh shell",
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Description: `
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gogs serv provide access auth for repositories`,
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Action: runServ,
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Flags: []cli.Flag{},
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}
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func init() {
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os.MkdirAll("log", os.ModePerm)
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log.NewLogger(10000, "file", fmt.Sprintf(`{"filename":"%s"}`, "log/serv.log"))
}
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func parseCmd(cmd string) (string, string) {
ss := strings.SplitN(cmd, " ", 2)
if len(ss) != 2 {
return "", ""
}
verb, args := ss[0], ss[1]
if verb == "git" {
ss = strings.SplitN(args, " ", 2)
args = ss[1]
verb = fmt.Sprintf("%s %s", verb, ss[0])
}
return verb, args
}
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func In(b string, sl map[string]int) bool {
_, e := sl[b]
return e
}
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func runServ(k *cli.Context) {
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base.NewConfigContext()
models.LoadModelsConfig()
models.NewEngine()
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keys := strings.Split(os.Args[2], "-")
if len(keys) != 2 {
fmt.Println("auth file format error")
return
}
keyId, err := strconv.ParseInt(keys[1], 10, 64)
if err != nil {
fmt.Println("auth file format error")
return
}
user, err := models.GetUserByKeyId(keyId)
if err != nil {
fmt.Println("You have no right to access")
return
}
cmd := os.Getenv("SSH_ORIGINAL_COMMAND")
if cmd == "" {
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println("Hi", user.Name, "! You've successfully authenticated, but Gogs does not provide shell access.")
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return
}
verb, args := parseCmd(cmd)
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rRepo := strings.Trim(args, "'")
rr := strings.SplitN(rRepo, "/", 2)
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if len(rr) != 2 {
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println("Unavilable repository", args)
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return
}
repoName := rr[1]
if strings.HasSuffix(repoName, ".git") {
repoName = repoName[:len(repoName)-4]
}
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isWrite := In(verb, COMMANDS_WRITE)
isRead := In(verb, COMMANDS_READONLY)
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repo, err := models.GetRepositoryByName(user.Id, repoName)
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var isExist bool = true
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if err != nil {
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if err == models.ErrRepoNotExist {
isExist = false
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if isRead {
println("Repository", user.Name+"/"+repoName, "is not exist")
return
}
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} else {
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println("Get repository error:", err)
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return
}
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}
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// access check
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switch {
case isWrite:
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has, err := models.HasAccess(user.Name, repoName, models.AU_WRITABLE)
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if err != nil {
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println("Inernel error:", err)
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return
}
if !has {
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println("You have no right to write this repository")
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return
}
case isRead:
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has, err := models.HasAccess(user.Name, repoName, models.AU_READABLE)
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if err != nil {
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println("Inernel error")
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return
}
if !has {
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has, err = models.HasAccess(user.Name, repoName, models.AU_WRITABLE)
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if err != nil {
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println("Inernel error")
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return
}
}
if !has {
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println("You have no right to access this repository")
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return
}
default:
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println("Unknown command")
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return
}
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var rep *git.Repository
repoPath := models.RepoPath(user.Name, repoName)
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if !isExist {
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if isWrite {
_, err = models.CreateRepository(user, repoName, "", "", "", false, true)
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if err != nil {
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println("Create repository failed")
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return
}
}
}
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rep, err = git.OpenRepository(repoPath)
if err != nil {
println(err.Error())
return
}
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refs, err := rep.AllReferencesMap()
if err != nil {
println(err.Error())
return
}
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gitcmd := exec.Command(verb, rRepo)
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gitcmd.Dir = base.RepoRootPath
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var s string
b := bytes.NewBufferString(s)
gitcmd.Stdout = io.MultiWriter(os.Stdout, b)
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//gitcmd.Stdin = io.MultiReader(os.Stdin, b)
gitcmd.Stdin = os.Stdin
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gitcmd.Stderr = os.Stderr
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if err = gitcmd.Run(); err != nil {
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println("execute command error:", err.Error())
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return
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}
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if isRead {
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return
}
time.Sleep(time.Second)
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// find push reference name
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var t = "ok refs/heads/"
var i int
var refname string
for {
l, err := b.ReadString('\n')
if err != nil {
break
}
i = i + 1
l = l[:len(l)-1]
idx := strings.Index(l, t)
if idx > 0 {
refname = l[idx+len(t):]
}
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}
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if refname == "" {
println("No find any reference name:", b.String())
return
}
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var ref *git.Reference
var ok bool
var l *list.List
//log.Info("----", refname, "-----")
if ref, ok = refs[refname]; !ok {
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// for new branch
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refs, err = rep.AllReferencesMap()
if err != nil {
println(err.Error())
return
}
if ref, ok = refs[refname]; !ok {
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log.Trace("unknow reference name -", refname, "-", b.String())
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return
}
l, err = ref.AllCommits()
if err != nil {
println(err.Error())
return
}
} else {
//log.Info("----", ref, "-----")
var last *git.Commit
//log.Info("00000", ref.Oid.String())
last, err = ref.LastCommit()
if err != nil {
println(err.Error())
return
}
ref2, err := rep.LookupReference(ref.Name)
if err != nil {
println(err.Error())
return
}
//log.Info("11111", ref2.Oid.String())
before, err := ref2.LastCommit()
if err != nil {
println(err.Error())
return
}
//log.Info("----", before.Id(), "-----", last.Id())
l = ref.CommitsBetween(before, last)
}
commits := make([][]string, 0)
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var maxCommits = 3
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for e := l.Front(); e != nil; e = e.Next() {
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commit := e.Value.(*git.Commit)
commits = append(commits, []string{commit.Id().String(), commit.Message()})
if len(commits) >= maxCommits {
break
}
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}
if err = models.CommitRepoAction(user.Id, user.Name,
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repo.Id, repoName, refname, &base.PushCommits{l.Len(), commits}); err != nil {
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log.Error("runUpdate.models.CommitRepoAction: %v", err, commits)
} else {
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c := exec.Command("git", "update-server-info")
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c.Dir = repoPath
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err := c.Run()
if err != nil {
log.Error("update-server-info: %v", err)
}
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}
}