Enable a way to checkout Pull Requests from remote refs

models/pull.go

@@ -5,6 +5,7 @@
 package models
 
 import (
+	"errors"
 	"fmt"
 	"os"
 	"path"
@@ -395,6 +396,44 @@ func GetUnmergedPullRequestsByBaseInfo(repoID int64, branch string) ([]*PullRequ
 		Join("INNER", "issue", "issue.id=pull_request.issue_id").Find(&prs)
 }
 
+// Gets a Pull Request by the path of the forked repo and the branch from where the PR
+// got submitted.
+func GetUnmergedPullRequestByRepoPathAndHeadBranch(user, repo, branch string) (*PullRequest, error) {
+	userLower := strings.ToLower(user)
+	repoLower := strings.ToLower(repo)
+
+	pr := new(PullRequest)
+	if x == nil {
+		return nil, errors.New("Fail")
+	}
+	has, err := x.
+		Where("head_user_name=? AND head_branch=? AND has_merged=? AND issue.is_closed=? AND repository.lower_name=?", userLower, branch, 0, 0, repoLower).
+		Join("INNER", "repository", "repository.id=pull_request.head_repo_id").
+		Join("INNER", "issue", "issue.id=pull_request.issue_id").
+		Get(pr)
+
+	if err != nil {
+		return nil, err
+	} else if !has {
+		return nil, ErrPullRequestNotExist{0, 0, 0, 0, branch, ""}
+	}
+
+	baseRepo := new(Repository)
+	has, err = x.Where("repository.id=?", pr.BaseRepoID).
+		Join("LEFT", "user", "user.id=repository.owner_id").
+		Get(baseRepo)
+
+	if err != nil {
+		return nil, err
+	} else if !has {
+		return nil, ErrRepoNotExist{pr.BaseRepoID, 0, ""}
+	}
+
+	pr.BaseRepo = baseRepo
+
+	return pr, nil
+}
+
 // GetPullRequestByID returns a pull request by given ID.
 func GetPullRequestByID(id int64) (*PullRequest, error) {
 	pr := new(PullRequest)

models/repo.go

@@ -39,6 +39,7 @@ import (
 
 const (
 	_TPL_UPDATE_HOOK = "#!/usr/bin/env %s\n%s update $1 $2 $3 --config='%s'\n"
+	_TPL_POST_RECEIVE_HOOK = "#!/usr/bin/env %s\n%s pull --path \"$(pwd)\"\n"
 )
 
 var (
@@ -596,6 +597,11 @@ func createUpdateHook(repoPath string) error {
 		fmt.Sprintf(_TPL_UPDATE_HOOK, setting.ScriptType, "\""+setting.AppPath+"\"", setting.CustomConf))
 }
 
+func createPostReceiveHook(repoPath string) error {
+	return git.SetPostReceiveHook(repoPath,
+		fmt.Sprintf(_TPL_POST_RECEIVE_HOOK, setting.ScriptType, "\""+setting.AppPath+"\""))
+}
+
 type MigrateRepoOptions struct {
 	Name        string
 	Description string
@@ -818,6 +824,8 @@ func initRepository(e Engine, repoPath string, u *User, repo *Repository, opts C
 		return fmt.Errorf("InitRepository: %v", err)
 	} else if err = createUpdateHook(repoPath); err != nil {
 		return fmt.Errorf("createUpdateHook: %v", err)
+	} else if err = createPostReceiveHook(repoPath); err != nil {
+		return fmt.Errorf("createPostReceiveHook: %v", err)
 	}
 
 	tmpDir := filepath.Join(os.TempDir(), "gogs-"+repo.Name+"-"+com.ToStr(time.Now().Nanosecond()))
@@ -1498,6 +1506,15 @@ func RewriteRepositoryUpdateHook() error {
 		})
 }
 
+// RewriteRepositoryPostReceiveHook rewrites all repositories' update hook.
+func RewriteRepositoryPostReceiveHook() error {
+	return x.Where("id > 0").Iterate(new(Repository),
+		func(idx int, bean interface{}) error {
+			repo := bean.(*Repository)
+			return createPostReceiveHook(repo.RepoPath())
+		})
+}
+
 // statusPool represents a pool of status with true/false.
 type statusPool struct {
 	lock sync.RWMutex
@@ -2045,6 +2062,8 @@ func ForkRepository(u *User, oldRepo *Repository, name, desc string) (_ *Reposit
 
 	if err = createUpdateHook(repoPath); err != nil {
 		return nil, fmt.Errorf("createUpdateHook: %v", err)
+	} else if err = createPostReceiveHook(repoPath); err != nil {
+		return nil, fmt.Errorf("createPostReceiveHook: %v", err)
 	}
 
 	return repo, sess.Commit()