1 files changed, 100 insertions, 0 deletions
diff --git a/cmd/pull.go b/cmd/pull.go
new file mode 100644
index 0000000000..cf5016eb54
--- /dev/null
+++ b/cmd/pull.go
@@ -0,0 +1,100 @@
+// Copyright 2015 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.
+
+package cmd
+
+import (
+	"bufio"
+	"log"
+	"os"
+	"strconv"
+	"strings"
+
+	"github.com/codegangsta/cli"
+	"github.com/gogits/git-module"
+	"github.com/gogits/gogs/models"
+)
+
+var CmdPull = cli.Command{
+	Name:        "pull",
+	Usage:       "Filter commits for Pull Request actions",
+	Description: `Checks commits for potential pull request updates and takes appropriate actions.`,
+	Action:      runPull,
+	Flags: []cli.Flag{
+		stringFlag("path, p", "", "repository path"),
+	},
+}
+
+func runPull(ctx *cli.Context) {
+	setup("pull.log")
+
+	if !ctx.IsSet("path") {
+		log.Fatal("Missing argument --path")
+	}
+
+	workingDirectory := ctx.String("path")
+
+	// Scan standard input (stdin) for updated refs
+	stdin := bufio.NewScanner(os.Stdin)
+	for stdin.Scan() {
+		// Format from post-receive is: <old-commit> <new-commit> <ref-name>
+		args := strings.Split(stdin.Text(), " ")
+		if len(args) < 3 {
+			continue
+		}
+
+		refName := args[2]
+		refSplits := strings.Split(refName, "/")
+
+		if len(refSplits) < 3 {
+			log.Fatal("Not enough elements in refs element.")
+		}
+
+		//	if refSplits[1] == "pull" {
+		//		log.Fatal("Not allowed to push to \"pull\" refs. Reserved for Pull Requests.")
+		//	} else
+		if refSplits[1] != "heads" {
+			// Only push branches of ref "heads"
+			continue
+		}
+
+		branch := strings.Join(refSplits[2:], "/")
+
+		repoPathSplits := strings.Split(workingDirectory, string(os.PathSeparator))
+		userName := repoPathSplits[len(repoPathSplits)-2]
+		repoName := repoPathSplits[len(repoPathSplits)-1]
+		repoName = repoName[0 : len(repoName)-4]
+
+		pr, err := models.GetUnmergedPullRequestByRepoPathAndHeadBranch(userName, repoName, branch)
+		if _, ok := err.(models.ErrPullRequestNotExist); ok {
+			// Nothing to do here if the branch has no Pull Request open
+			log.Printf("Skipping for %s/%s.git branch '%s'", userName, repoName, branch)
+			continue
+		} else if err != nil {
+			log.Fatal("Database operation failed: " + err.Error())
+		}
+
+		err = pr.BaseRepo.GetOwner()
+		if err != nil {
+			log.Fatal("Could not get owner data: " + err.Error())
+		}
+
+		prIdStr := strconv.FormatInt(pr.ID, 10)
+		tmpRemoteName := "tmp-pull-" + branch + "-" + prIdStr
+		remoteUrl := "../../" + pr.BaseRepo.Owner.LowerName + "/" + pr.BaseRepo.LowerName + ".git"
+		repo, err := git.OpenRepository(workingDirectory)
+		repo.AddRemote(tmpRemoteName, remoteUrl, false)
+
+		err = git.Push(workingDirectory, tmpRemoteName, branch+":"+"refs/pull/"+prIdStr+"/head")
+		if err != nil {
+			log.Fatal("Error pushing: " + err.Error())
+		}
+
+		err = repo.RemoveRemote(tmpRemoteName)
+
+		if err != nil {
+			log.Fatal("Error deleting temporary remote: " + err.Error())
+		}
+	}
+}