vendor: rename "gogits" to "gogs"

26 files changed, 3166 insertions, 0 deletions

diff --git a/vendor/github.com/gogs/git-module/LICENSE b/vendor/github.com/gogs/git-module/LICENSE
new file mode 100644
index 00000000..176d8dfe
--- /dev/null
+++ b/vendor/github.com/gogs/git-module/LICENSE
@@ -0,0 +1,19 @@
+Copyright (c) 2015 All Gogs Contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
\ No newline at end of file
diff --git a/vendor/github.com/gogs/git-module/README.md b/vendor/github.com/gogs/git-module/README.md
new file mode 100644
index 00000000..f9569ceb
--- /dev/null
+++ b/vendor/github.com/gogs/git-module/README.md
@@ -0,0 +1,13 @@
+# Git Module [![Build Status](https://travis-ci.org/gogits/git-module.svg?branch=master)](https://travis-ci.org/gogits/git-module)
+
+Package git-module is a Go module for Git access through shell commands.
+
+## Limitations
+
+- Go version must be at least **1.4**.
+- Git version must be no less than **1.7.1**, and greater than or equal to **1.8.3** is recommended.
+- For Windows users, try use as new a version as possible.
+
+## License
+
+This project is under the MIT License. See the [LICENSE](LICENSE) file for the full license text.
diff --git a/vendor/github.com/gogs/git-module/blob.go b/vendor/github.com/gogs/git-module/blob.go
new file mode 100644
index 00000000..7731226d
--- /dev/null
+++ b/vendor/github.com/gogs/git-module/blob.go
@@ -0,0 +1,35 @@
+// 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 git
+
+import (
+	"bytes"
+	"io"
+)
+
+// Blob represents a Git object.
+type Blob struct {
+	repo *Repository
+	*TreeEntry
+}
+
+// Data gets content of blob all at once and wrap it as io.Reader.
+// This can be very slow and memory consuming for huge content.
+func (b *Blob) Data() (io.Reader, error) {
+	stdout := new(bytes.Buffer)
+	stderr := new(bytes.Buffer)
+
+	// Preallocate memory to save ~50% memory usage on big files.
+	stdout.Grow(int(b.Size() + 2048))
+
+	if err := b.DataPipeline(stdout, stderr); err != nil {
+		return nil, concatenateError(err, stderr.String())
+	}
+	return stdout, nil
+}
+
+func (b *Blob) DataPipeline(stdout, stderr io.Writer) error {
+	return NewCommand("show", b.ID.String()).RunInDirPipeline(b.repo.Path, stdout, stderr)
+}
diff --git a/vendor/github.com/gogs/git-module/command.go b/vendor/github.com/gogs/git-module/command.go
new file mode 100644
index 00000000..80caea08
--- /dev/null
+++ b/vendor/github.com/gogs/git-module/command.go
@@ -0,0 +1,150 @@
+// 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 git
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"os"
+	"os/exec"
+	"strings"
+	"time"
+)
+
+// Command represents a command with its subcommands or arguments.
+type Command struct {
+	name string
+	args []string
+	envs []string
+}
+
+func (c *Command) String() string {
+	if len(c.args) == 0 {
+		return c.name
+	}
+	return fmt.Sprintf("%s %s", c.name, strings.Join(c.args, " "))
+}
+
+// NewCommand creates and returns a new Git Command based on given command and arguments.
+func NewCommand(args ...string) *Command {
+	return &Command{
+		name: "git",
+		args: args,
+	}
+}
+
+// AddArguments adds new argument(s) to the command.
+func (c *Command) AddArguments(args ...string) *Command {
+	c.args = append(c.args, args...)
+	return c
+}
+
+// AddEnvs adds new environment variables to the command.
+func (c *Command) AddEnvs(envs ...string) *Command {
+	c.envs = append(c.envs, envs...)
+	return c
+}
+
+const DEFAULT_TIMEOUT = 60 * time.Second
+
+// RunInDirTimeoutPipeline executes the command in given directory with given timeout,
+// it pipes stdout and stderr to given io.Writer.
+func (c *Command) RunInDirTimeoutPipeline(timeout time.Duration, dir string, stdout, stderr io.Writer) error {
+	if timeout == -1 {
+		timeout = DEFAULT_TIMEOUT
+	}
+
+	if len(dir) == 0 {
+		log(c.String())
+	} else {
+		log("%s: %v", dir, c)
+	}
+
+	cmd := exec.Command(c.name, c.args...)
+	if c.envs != nil {
+		cmd.Env = append(os.Environ(), c.envs...)
+	}
+	cmd.Dir = dir
+	cmd.Stdout = stdout
+	cmd.Stderr = stderr
+	if err := cmd.Start(); err != nil {
+		return err
+	}
+
+	done := make(chan error)
+	go func() {
+		done <- cmd.Wait()
+	}()
+
+	var err error
+	select {
+	case <-time.After(timeout):
+		if cmd.Process != nil && cmd.ProcessState != nil && !cmd.ProcessState.Exited() {
+			if err := cmd.Process.Kill(); err != nil {
+				return fmt.Errorf("fail to kill process: %v", err)
+			}
+		}
+
+		<-done
+		return ErrExecTimeout{timeout}
+	case err = <-done:
+	}
+
+	return err
+}
+
+// RunInDirTimeout executes the command in given directory with given timeout,
+// and returns stdout in []byte and error (combined with stderr).
+func (c *Command) RunInDirTimeout(timeout time.Duration, dir string) ([]byte, error) {
+	stdout := new(bytes.Buffer)
+	stderr := new(bytes.Buffer)
+	if err := c.RunInDirTimeoutPipeline(timeout, dir, stdout, stderr); err != nil {
+		return nil, concatenateError(err, stderr.String())
+	}
+
+	if stdout.Len() > 0 {
+		log("stdout:\n%s", stdout.Bytes()[:1024])
+	}
+	return stdout.Bytes(), nil
+}
+
+// RunInDirPipeline executes the command in given directory,
+// it pipes stdout and stderr to given io.Writer.
+func (c *Command) RunInDirPipeline(dir string, stdout, stderr io.Writer) error {
+	return c.RunInDirTimeoutPipeline(-1, dir, stdout, stderr)
+}
+
+// RunInDir executes the command in given directory
+// and returns stdout in []byte and error (combined with stderr).
+func (c *Command) RunInDirBytes(dir string) ([]byte, error) {
+	return c.RunInDirTimeout(-1, dir)
+}
+
+// RunInDir executes the command in given directory
+// and returns stdout in string and error (combined with stderr).
+func (c *Command) RunInDir(dir string) (string, error) {
+	stdout, err := c.RunInDirTimeout(-1, dir)
+	if err != nil {
+		return "", err
+	}
+	return string(stdout), nil
+}
+
+// RunTimeout executes the command in defualt working directory with given timeout,
+// and returns stdout in string and error (combined with stderr).
+func (c *Command) RunTimeout(timeout time.Duration) (string, error) {
+	stdout, err := c.RunInDirTimeout(timeout, "")
+	if err != nil {
+		return "", err
+	}
+	return string(stdout), nil
+}
+
+// Run executes the command in defualt working directory
+// and returns stdout in string and error (combined with stderr).
+func (c *Command) Run() (string, error) {
+	return c.RunTimeout(-1)
+}
diff --git a/vendor/github.com/gogs/git-module/commit.go b/vendor/github.com/gogs/git-module/commit.go
new file mode 100644
index 00000000..64831d7f
--- /dev/null
+++ b/vendor/github.com/gogs/git-module/commit.go
@@ -0,0 +1,310 @@
+// 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 git
+
+import (
+	"bufio"
+	"bytes"
+	"container/list"
+	"fmt"
+	"io"
+	"net/http"
+	"strconv"
+	"strings"
+
+	"github.com/mcuadros/go-version"
+)
+
+// Commit represents a git commit.
+type Commit struct {
+	Tree
+	ID            sha1 // The ID of this commit object
+	Author        *Signature
+	Committer     *Signature
+	CommitMessage string
+
+	parents        []sha1 // SHA1 strings
+	submoduleCache *objectCache
+}
+
+// Message returns the commit message. Same as retrieving CommitMessage directly.
+func (c *Commit) Message() string {
+	return c.CommitMessage
+}
+
+// Summary returns first line of commit message.
+func (c *Commit) Summary() string {
+	return strings.Split(c.CommitMessage, "\n")[0]
+}
+
+// ParentID returns oid of n-th parent (0-based index).
+// It returns nil if no such parent exists.
+func (c *Commit) ParentID(n int) (sha1, error) {
+	if n >= len(c.parents) {
+		return sha1{}, ErrNotExist{"", ""}
+	}
+	return c.parents[n], nil
+}
+
+// Parent returns n-th parent (0-based index) of the commit.
+func (c *Commit) Parent(n int) (*Commit, error) {
+	id, err := c.ParentID(n)
+	if err != nil {
+		return nil, err
+	}
+	parent, err := c.repo.getCommit(id)
+	if err != nil {
+		return nil, err
+	}
+	return parent, nil
+}
+
+// ParentCount returns number of parents of the commit.
+// 0 if this is the root commit,  otherwise 1,2, etc.
+func (c *Commit) ParentCount() int {
+	return len(c.parents)
+}
+
+func isImageFile(data []byte) (string, bool) {
+	contentType := http.DetectContentType(data)
+	if strings.Index(contentType, "image/") != -1 {
+		return contentType, true
+	}
+	return contentType, false
+}
+
+func (c *Commit) IsImageFile(name string) bool {
+	blob, err := c.GetBlobByPath(name)
+	if err != nil {
+		return false
+	}
+
+	dataRc, err := blob.Data()
+	if err != nil {
+		return false
+	}
+	buf := make([]byte, 1024)
+	n, _ := dataRc.Read(buf)
+	buf = buf[:n]
+	_, isImage := isImageFile(buf)
+	return isImage
+}
+
+// GetCommitByPath return the commit of relative path object.
+func (c *Commit) GetCommitByPath(relpath string) (*Commit, error) {
+	return c.repo.getCommitByPathWithID(c.ID, relpath)
+}
+
+// AddAllChanges marks local changes to be ready for commit.
+func AddChanges(repoPath string, all bool, files ...string) error {
+	cmd := NewCommand("add")
+	if all {
+		cmd.AddArguments("--all")
+	}
+	_, err := cmd.AddArguments(files...).RunInDir(repoPath)
+	return err
+}
+
+type CommitChangesOptions struct {
+	Committer *Signature
+	Author    *Signature
+	Message   string
+}
+
+// CommitChanges commits local changes with given committer, author and message.
+// If author is nil, it will be the same as committer.
+func CommitChanges(repoPath string, opts CommitChangesOptions) error {
+	cmd := NewCommand()
+	if opts.Committer != nil {
+		cmd.AddEnvs("GIT_COMMITTER_NAME="+opts.Committer.Name, "GIT_COMMITTER_EMAIL="+opts.Committer.Email)
+	}
+	cmd.AddArguments("commit")
+
+	if opts.Author == nil {
+		opts.Author = opts.Committer
+	}
+	if opts.Author != nil {
+		cmd.AddArguments(fmt.Sprintf("--author='%s <%s>'", opts.Author.Name, opts.Author.Email))
+	}
+	cmd.AddArguments("-m", opts.Message)
+
+	_, err := cmd.RunInDir(repoPath)
+	// No stderr but exit status 1 means nothing to commit.
+	if err != nil && err.Error() == "exit status 1" {
+		return nil
+	}
+	return err
+}
+
+func commitsCount(repoPath, revision, relpath string) (int64, error) {
+	var cmd *Command
+	isFallback := false
+	if version.Compare(gitVersion, "1.8.0", "<") {
+		isFallback = true
+		cmd = NewCommand("log", "--pretty=format:''")
+	} else {
+		cmd = NewCommand("rev-list", "--count")
+	}
+	cmd.AddArguments(revision)
+	if len(relpath) > 0 {
+		cmd.AddArguments("--", relpath)
+	}
+
+	stdout, err := cmd.RunInDir(repoPath)
+	if err != nil {
+		return 0, err
+	}
+
+	if isFallback {
+		return int64(strings.Count(stdout, "\n")) + 1, nil
+	}
+	return strconv.ParseInt(strings.TrimSpace(stdout), 10, 64)
+}
+
+// CommitsCount returns number of total commits of until given revision.
+func CommitsCount(repoPath, revision string) (int64, error) {
+	return commitsCount(repoPath, revision, "")
+}
+
+func (c *Commit) CommitsCount() (int64, error) {
+	return CommitsCount(c.repo.Path, c.ID.String())
+}
+
+func (c *Commit) CommitsByRangeSize(page, size int) (*list.List, error) {
+	return c.repo.CommitsByRangeSize(c.ID.String(), page, size)
+}
+
+func (c *Commit) CommitsByRange(page int) (*list.List, error) {
+	return c.repo.CommitsByRange(c.ID.String(), page)
+}
+
+func (c *Commit) CommitsBefore() (*list.List, error) {
+	return c.repo.getCommitsBefore(c.ID)
+}
+
+func (c *Commit) CommitsBeforeLimit(num int) (*list.List, error) {
+	return c.repo.getCommitsBeforeLimit(c.ID, num)
+}
+
+func (c *Commit) CommitsBeforeUntil(commitID string) (*list.List, error) {
+	endCommit, err := c.repo.GetCommit(commitID)
+	if err != nil {
+		return nil, err
+	}
+	return c.repo.CommitsBetween(c, endCommit)
+}
+
+func (c *Commit) SearchCommits(keyword string) (*list.List, error) {
+	return c.repo.searchCommits(c.ID, keyword)
+}
+
+func (c *Commit) GetFilesChangedSinceCommit(pastCommit string) ([]string, error) {
+	return c.repo.getFilesChanged(pastCommit, c.ID.String())
+}
+
+func (c *Commit) GetSubModules() (*objectCache, error) {
+	if c.submoduleCache != nil {
+		return c.submoduleCache, nil
+	}
+
+	entry, err := c.GetTreeEntryByPath(".gitmodules")
+	if err != nil {
+		return nil, err
+	}
+	rd, err := entry.Blob().Data()
+	if err != nil {
+		return nil, err
+	}
+
+	scanner := bufio.NewScanner(rd)
+	c.submoduleCache = newObjectCache()
+	var ismodule bool
+	var path string
+	for scanner.Scan() {
+		if strings.HasPrefix(scanner.Text(), "[submodule") {
+			ismodule = true
+			continue
+		}
+		if ismodule {
+			fields := strings.Split(scanner.Text(), "=")
+			k := strings.TrimSpace(fields[0])
+			if k == "path" {
+				path = strings.TrimSpace(fields[1])
+			} else if k == "url" {
+				c.submoduleCache.Set(path, &SubModule{path, strings.TrimSpace(fields[1])})
+				ismodule = false
+			}
+		}
+	}
+
+	return c.submoduleCache, nil
+}
+
+func (c *Commit) GetSubModule(entryname string) (*SubModule, error) {
+	modules, err := c.GetSubModules()
+	if err != nil {
+		return nil, err
+	}
+
+	module, has := modules.Get(entryname)
+	if has {
+		return module.(*SubModule), nil
+	}
+	return nil, nil
+}
+
+// CommitFileStatus represents status of files in a commit.
+type CommitFileStatus struct {
+	Added    []string
+	Removed  []string
+	Modified []string
+}
+
+func NewCommitFileStatus() *CommitFileStatus {
+	return &CommitFileStatus{
+		[]string{}, []string{}, []string{},
+	}
+}
+
+// GetCommitFileStatus returns file status of commit in given repository.
+func GetCommitFileStatus(repoPath, commitID string) (*CommitFileStatus, error) {
+	stdout, w := io.Pipe()
+	done := make(chan struct{})
+	fileStatus := NewCommitFileStatus()
+	go func() {
+		scanner := bufio.NewScanner(stdout)
+		for scanner.Scan() {
+			fields := strings.Fields(scanner.Text())
+			if len(fields) < 2 {
+				continue
+			}
+
+			switch fields[0][0] {
+			case 'A':
+				fileStatus.Added = append(fileStatus.Added, fields[1])
+			case 'D':
+				fileStatus.Removed = append(fileStatus.Removed, fields[1])
+			case 'M':
+				fileStatus.Modified = append(fileStatus.Modified, fields[1])
+			}
+		}
+		done <- struct{}{}
+	}()
+
+	stderr := new(bytes.Buffer)
+	err := NewCommand("log", "-1", "--name-status", "--pretty=format:''", commitID).RunInDirPipeline(repoPath, w, stderr)
+	w.Close() // Close writer to exit parsing goroutine
+	if err != nil {
+		return nil, concatenateError(err, stderr.String())
+	}
+
+	<-done
+	return fileStatus, nil
+}
+
+// FileStatus returns file status of commit.
+func (c *Commit) FileStatus() (*CommitFileStatus, error) {
+	return GetCommitFileStatus(c.repo.Path, c.ID.String())
+}
diff --git a/vendor/github.com/gogs/git-module/commit_archive.go b/vendor/github.com/gogs/git-module/commit_archive.go
new file mode 100644
index 00000000..1066ba69
--- /dev/null
+++ b/vendor/github.com/gogs/git-module/commit_archive.go
@@ -0,0 +1,33 @@
+// 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 git
+
+import (
+	"fmt"
+	"path/filepath"
+	"strings"
+)
+
+type ArchiveType int
+
+const (
+	ZIP ArchiveType = iota + 1
+	TARGZ
+)
+
+func (c *Commit) CreateArchive(target string, archiveType ArchiveType) error {
+	var format string
+	switch archiveType {
+	case ZIP:
+		format = "zip"
+	case TARGZ:
+		format = "tar.gz"
+	default:
+		return fmt.Errorf("unknown format: %v", archiveType)
+	}
+
+	_, err := NewCommand("archive", "--prefix="+filepath.Base(strings.TrimSuffix(c.repo.Path, ".git"))+"/", "--format="+format, "-o", target, c.ID.String()).RunInDir(c.repo.Path)
+	return err
+}
diff --git a/vendor/github.com/gogs/git-module/error.go b/vendor/github.com/gogs/git-module/error.go
new file mode 100644
index 00000000..2fefaa1e
--- /dev/null
+++ b/vendor/github.com/gogs/git-module/error.go
@@ -0,0 +1,61 @@
+// 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 git
+
+import (
+	"fmt"
+	"time"
+)
+
+type ErrExecTimeout struct {
+	Duration time.Duration
+}
+
+func IsErrExecTimeout(err error) bool {
+	_, ok := err.(ErrExecTimeout)
+	return ok
+}
+
+func (err ErrExecTimeout) Error() string {
+	return fmt.Sprintf("execution is timeout [duration: %v]", err.Duration)
+}
+
+type ErrNotExist struct {
+	ID      string
+	RelPath string
+}
+
+func IsErrNotExist(err error) bool {
+	_, ok := err.(ErrNotExist)
+	return ok
+}
+
+func (err ErrNotExist) Error() string {
+	return fmt.Sprintf("object does not exist [id: %s, rel_path: %s]", err.ID, err.RelPath)
+}
+
+type ErrUnsupportedVersion struct {
+	Required string
+}
+
+func IsErrUnsupportedVersion(err error) bool {
+	_, ok := err.(ErrUnsupportedVersion)
+	return ok
+}
+
+func (err ErrUnsupportedVersion) Error() string {
+	return fmt.Sprintf("Operation requires higher version [required: %s]", err.Required)
+}
+
+type ErrNoMergeBase struct{}
+
+func IsErrNoMergeBase(err error) bool {
+	_, ok := err.(ErrNoMergeBase)
+	return ok
+}
+
+func (err ErrNoMergeBase) Error() string {
+	return "no merge based found"
+}
diff --git a/vendor/github.com/gogs/git-module/git.go b/vendor/github.com/gogs/git-module/git.go
new file mode 100644
index 00000000..414d67cd
--- /dev/null
+++ b/vendor/github.com/gogs/git-module/git.go
@@ -0,0 +1,80 @@
+// 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 git
+
+import (
+	"fmt"
+	"strings"
+	"time"
+)
+
+const _VERSION = "0.6.4"
+
+func Version() string {
+	return _VERSION
+}
+
+var (
+	// Debug enables verbose logging on everything.
+	// This should be false in case Gogs starts in SSH mode.
+	Debug  = false
+	Prefix = "[git-module] "
+)
+
+func log(format string, args ...interface{}) {
+	if !Debug {
+		return
+	}
+
+	fmt.Print(Prefix)
+	if len(args) == 0 {
+		fmt.Println(format)
+	} else {
+		fmt.Printf(format+"\n", args...)
+	}
+}
+
+var gitVersion string
+
+// Version returns current Git version from shell.
+func BinVersion() (string, error) {
+	if len(gitVersion) > 0 {
+		return gitVersion, nil
+	}
+
+	stdout, err := NewCommand("version").Run()
+	if err != nil {
+		return "", err
+	}
+
+	fields := strings.Fields(stdout)
+	if len(fields) < 3 {
+		return "", fmt.Errorf("not enough output: %s", stdout)
+	}
+
+	// Handle special case on Windows.
+	i := strings.Index(fields[2], "windows")
+	if i >= 1 {
+		gitVersion = fields[2][:i-1]
+		return gitVersion, nil
+	}
+
+	gitVersion = fields[2]
+	return gitVersion, nil
+}
+
+func init() {
+	BinVersion()
+}
+
+// Fsck verifies the connectivity and validity of the objects in the database
+func Fsck(repoPath string, timeout time.Duration, args ...string) error {
+	// Make sure timeout makes sense.
+	if timeout <= 0 {
+		timeout = -1
+	}
+	_, err := NewCommand("fsck").AddArguments(args...).RunInDirTimeout(timeout, repoPath)
+	return err
+}
diff --git a/vendor/github.com/gogs/git-module/hook.go b/vendor/github.com/gogs/git-module/hook.go
new file mode 100644
index 00000000..a0d0b16b
--- /dev/null
+++ b/vendor/github.com/gogs/git-module/hook.go
@@ -0,0 +1,111 @@
+// 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 git
+
+import (
+	"errors"
+	"io/ioutil"
+	"os"
+	"path"
+	"strings"
+)
+
+var (
+	// Direcotry of hook and sample files. Can be changed to "custom_hooks" for very purpose.
+	HookDir       = "hooks"
+	HookSampleDir = HookDir
+	// HookNames is a list of Git server hooks' name that are supported.
+	HookNames = []string{
+		"pre-receive",
+		"update",
+		"post-receive",
+	}
+)
+
+var (
+	ErrNotValidHook = errors.New("not a valid Git hook")
+)
+
+// IsValidHookName returns true if given name is a valid Git hook.
+func IsValidHookName(name string) bool {
+	for _, hn := range HookNames {
+		if hn == name {
+			return true
+		}
+	}
+	return false
+}
+
+// Hook represents a Git hook.
+type Hook struct {
+	name     string
+	IsActive bool   // Indicates whether repository has this hook.
+	Content  string // Content of hook if it's active.
+	Sample   string // Sample content from Git.
+	path     string // Hook file path.
+}
+
+// GetHook returns a Git hook by given name and repository.
+func GetHook(repoPath, name string) (*Hook, error) {
+	if !IsValidHookName(name) {
+		return nil, ErrNotValidHook
+	}
+	h := &Hook{
+		name: name,
+		path: path.Join(repoPath, HookDir, name),
+	}
+	if isFile(h.path) {
+		data, err := ioutil.ReadFile(h.path)
+		if err != nil {
+			return nil, err
+		}
+		h.IsActive = true
+		h.Content = string(data)
+		return h, nil
+	}
+
+	// Check sample file
+	samplePath := path.Join(repoPath, HookSampleDir, h.name) + ".sample"
+	if isFile(samplePath) {
+		data, err := ioutil.ReadFile(samplePath)
+		if err != nil {
+			return nil, err
+		}
+		h.Sample = string(data)
+	}
+	return h, nil
+}
+
+func (h *Hook) Name() string {
+	return h.name
+}
+
+// Update updates content hook file.
+func (h *Hook) Update() error {
+	if len(strings.TrimSpace(h.Content)) == 0 {
+		if isExist(h.path) {
+			return os.Remove(h.path)
+		}
+		return nil
+	}
+	os.MkdirAll(path.Dir(h.path), os.ModePerm)
+	return ioutil.WriteFile(h.path, []byte(strings.Replace(h.Content, "\r", "", -1)), os.ModePerm)
+}
+
+// ListHooks returns a list of Git hooks of given repository.
+func ListHooks(repoPath string) (_ []*Hook, err error) {
+	if !isDir(path.Join(repoPath, "hooks")) {
+		return nil, errors.New("hooks path does not exist")
+	}
+
+	hooks := make([]*Hook, len(HookNames))
+	for i, name := range HookNames {
+		hooks[i], err = GetHook(repoPath, name)
+		if err != nil {
+			return nil, err
+		}
+	}
+	return hooks, nil
+}
diff --git a/vendor/github.com/gogs/git-module/repo.go b/vendor/github.com/gogs/git-module/repo.go
new file mode 100644
index 00000000..ca4805f5
--- /dev/null
+++ b/vendor/github.com/gogs/git-module/repo.go
@@ -0,0 +1,295 @@
+// 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 git
+
+import (
+	"bytes"
+	"container/list"
+	"errors"
+	"os"
+	"path"
+	"path/filepath"
+	"strings"
+	"time"
+
+	"github.com/Unknwon/com"
+)
+
+// Repository represents a Git repository.
+type Repository struct {
+	Path string
+
+	commitCache *objectCache
+	tagCache    *objectCache
+}
+
+const _PRETTY_LOG_FORMAT = `--pretty=format:%H`
+
+func (repo *Repository) parsePrettyFormatLogToList(logs []byte) (*list.List, error) {
+	l := list.New()
+	if len(logs) == 0 {
+		return l, nil
+	}
+
+	parts := bytes.Split(logs, []byte{'\n'})
+
+	for _, commitId := range parts {
+		commit, err := repo.GetCommit(string(commitId))
+		if err != nil {
+			return nil, err
+		}
+		l.PushBack(commit)
+	}
+
+	return l, nil
+}
+
+type NetworkOptions struct {
+	URL     string
+	Timeout time.Duration
+}
+
+// IsRepoURLAccessible checks if given repository URL is accessible.
+func IsRepoURLAccessible(opts NetworkOptions) bool {
+	cmd := NewCommand("ls-remote", "-q", "-h", opts.URL, "HEAD")
+	if opts.Timeout <= 0 {
+		opts.Timeout = -1
+	}
+	_, err := cmd.RunTimeout(opts.Timeout)
+	if err != nil {
+		return false
+	}
+	return true
+}
+
+// InitRepository initializes a new Git repository.
+func InitRepository(repoPath string, bare bool) error {
+	os.MkdirAll(repoPath, os.ModePerm)
+
+	cmd := NewCommand("init")
+	if bare {
+		cmd.AddArguments("--bare")
+	}
+	_, err := cmd.RunInDir(repoPath)
+	return err
+}
+
+// OpenRepository opens the repository at the given path.
+func OpenRepository(repoPath string) (*Repository, error) {
+	repoPath, err := filepath.Abs(repoPath)
+	if err != nil {
+		return nil, err
+	} else if !isDir(repoPath) {
+		return nil, errors.New("no such file or directory")
+	}
+
+	return &Repository{
+		Path:        repoPath,
+		commitCache: newObjectCache(),
+		tagCache:    newObjectCache(),
+	}, nil
+}
+
+type CloneRepoOptions struct {
+	Mirror  bool
+	Bare    bool
+	Quiet   bool
+	Branch  string
+	Timeout time.Duration
+}
+
+// Clone clones original repository to target path.
+func Clone(from, to string, opts CloneRepoOptions) (err error) {
+	toDir := path.Dir(to)
+	if err = os.MkdirAll(toDir, os.ModePerm); err != nil {
+		return err
+	}
+
+	cmd := NewCommand("clone")
+	if opts.Mirror {
+		cmd.AddArguments("--mirror")
+	}
+	if opts.Bare {
+		cmd.AddArguments("--bare")
+	}
+	if opts.Quiet {
+		cmd.AddArguments("--quiet")
+	}
+	if len(opts.Branch) > 0 {
+		cmd.AddArguments("-b", opts.Branch)
+	}
+	cmd.AddArguments(from, to)
+
+	if opts.Timeout <= 0 {
+		opts.Timeout = -1
+	}
+	_, err = cmd.RunTimeout(opts.Timeout)
+	return err
+}
+
+type FetchRemoteOptions struct {
+	Prune   bool
+	Timeout time.Duration
+}
+
+// Fetch fetches changes from remotes without merging.
+func Fetch(repoPath string, opts FetchRemoteOptions) error {
+	cmd := NewCommand("fetch")
+	if opts.Prune {
+		cmd.AddArguments("--prune")
+	}
+
+	if opts.Timeout <= 0 {
+		opts.Timeout = -1
+	}
+	_, err := cmd.RunInDirTimeout(opts.Timeout, repoPath)
+	return err
+}
+
+type PullRemoteOptions struct {
+	All     bool
+	Rebase  bool
+	Remote  string
+	Branch  string
+	Timeout time.Duration
+}
+
+// Pull pulls changes from remotes.
+func Pull(repoPath string, opts PullRemoteOptions) error {
+	cmd := NewCommand("pull")
+	if opts.Rebase {
+		cmd.AddArguments("--rebase")
+	}
+	if opts.All {
+		cmd.AddArguments("--all")
+	} else {
+		cmd.AddArguments(opts.Remote)
+		cmd.AddArguments(opts.Branch)
+	}
+
+	if opts.Timeout <= 0 {
+		opts.Timeout = -1
+	}
+	_, err := cmd.RunInDirTimeout(opts.Timeout, repoPath)
+	return err
+}
+
+// Push pushs local commits to given remote branch.
+func Push(repoPath, remote, branch string) error {
+	_, err := NewCommand("push", remote, branch).RunInDir(repoPath)
+	return err
+}
+
+type CheckoutOptions struct {
+	Branch    string
+	OldBranch string
+	Timeout   time.Duration
+}
+
+// Checkout checkouts a branch
+func Checkout(repoPath string, opts CheckoutOptions) error {
+	cmd := NewCommand("checkout")
+	if len(opts.OldBranch) > 0 {
+		cmd.AddArguments("-b")
+	}
+
+	cmd.AddArguments(opts.Branch)
+
+	if len(opts.OldBranch) > 0 {
+		cmd.AddArguments(opts.OldBranch)
+	}
+	if opts.Timeout <= 0 {
+		opts.Timeout = -1
+	}
+	_, err := cmd.RunInDirTimeout(opts.Timeout, repoPath)
+	return err
+}
+
+// ResetHEAD resets HEAD to given revision or head of branch.
+func ResetHEAD(repoPath string, hard bool, revision string) error {
+	cmd := NewCommand("reset")
+	if hard {
+		cmd.AddArguments("--hard")
+	}
+	_, err := cmd.AddArguments(revision).RunInDir(repoPath)
+	return err
+}
+
+// MoveFile moves a file to another file or directory.
+func MoveFile(repoPath, oldTreeName, newTreeName string) error {
+	_, err := NewCommand("mv").AddArguments(oldTreeName, newTreeName).RunInDir(repoPath)
+	return err
+}
+
+// CountObject represents disk usage report of Git repository.
+type CountObject struct {
+	Count         int64
+	Size          int64
+	InPack        int64
+	Packs         int64
+	SizePack      int64
+	PrunePackable int64
+	Garbage       int64
+	SizeGarbage   int64
+}
+
+const (
+	_STAT_COUNT          = "count: "
+	_STAT_SIZE           = "size: "
+	_STAT_IN_PACK        = "in-pack: "
+	_STAT_PACKS          = "packs: "
+	_STAT_SIZE_PACK      = "size-pack: "
+	_STAT_PRUNE_PACKABLE = "prune-packable: "
+	_STAT_GARBAGE        = "garbage: "
+	_STAT_SIZE_GARBAGE   = "size-garbage: "
+)
+
+// GetRepoSize returns disk usage report of repository in given path.
+func GetRepoSize(repoPath string) (*CountObject, error) {
+	cmd := NewCommand("count-objects", "-v")
+	stdout, err := cmd.RunInDir(repoPath)
+	if err != nil {
+		return nil, err
+	}
+
+	countObject := new(CountObject)
+	for _, line := range strings.Split(stdout, "\n") {
+		switch {
+		case strings.HasPrefix(line, _STAT_COUNT):
+			countObject.Count = com.StrTo(line[7:]).MustInt64()
+		case strings.HasPrefix(line, _STAT_SIZE):
+			countObject.Size = com.StrTo(line[6:]).MustInt64() * 1024
+		case strings.HasPrefix(line, _STAT_IN_PACK):
+			countObject.InPack = com.StrTo(line[9:]).MustInt64()
+		case strings.HasPrefix(line, _STAT_PACKS):
+			countObject.Packs = com.StrTo(line[7:]).MustInt64()
+		case strings.HasPrefix(line, _STAT_SIZE_PACK):
+			countObject.SizePack = com.StrTo(line[11:]).MustInt64() * 1024
+		case strings.HasPrefix(line, _STAT_PRUNE_PACKABLE):
+			countObject.PrunePackable = com.StrTo(line[16:]).MustInt64()
+		case strings.HasPrefix(line, _STAT_GARBAGE):
+			countObject.Garbage = com.StrTo(line[9:]).MustInt64()
+		case strings.HasPrefix(line, _STAT_SIZE_GARBAGE):
+			countObject.SizeGarbage = com.StrTo(line[14:]).MustInt64() * 1024
+		}
+	}
+
+	return countObject, nil
+}
+
+// GetLatestCommitDate returns the date of latest commit of repository.
+// If branch is empty, it returns the latest commit across all branches.
+func GetLatestCommitDate(repoPath, branch string) (time.Time, error) {
+	cmd := NewCommand("for-each-ref", "--count=1", "--sort=-committerdate", "--format=%(committerdate:iso8601)")
+	if len(branch) > 0 {
+		cmd.AddArguments("refs/heads/" + branch)
+	}
+	stdout, err := cmd.RunInDir(repoPath)
+	if err != nil {
+		return time.Time{}, err
+	}
+
+	return time.Parse("2006-01-02 15:04:05 -0700", strings.TrimSpace(stdout))
+}
diff --git a/vendor/github.com/gogs/git-module/repo_branch.go b/vendor/github.com/gogs/git-module/repo_branch.go
new file mode 100644
index 00000000..de3f6ca1
--- /dev/null
+++ b/vendor/github.com/gogs/git-module/repo_branch.go
@@ -0,0 +1,126 @@
+// 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 git
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/mcuadros/go-version"
+)
+
+const BRANCH_PREFIX = "refs/heads/"
+
+// IsReferenceExist returns true if given reference exists in the repository.
+func IsReferenceExist(repoPath, name string) bool {
+	_, err := NewCommand("show-ref", "--verify", name).RunInDir(repoPath)
+	return err == nil
+}
+
+// IsBranchExist returns true if given branch exists in the repository.
+func IsBranchExist(repoPath, name string) bool {
+	return IsReferenceExist(repoPath, BRANCH_PREFIX+name)
+}
+
+func (repo *Repository) IsBranchExist(name string) bool {
+	return IsBranchExist(repo.Path, name)
+}
+
+// Branch represents a Git branch.
+type Branch struct {
+	Name string
+	Path string
+}
+
+// GetHEADBranch returns corresponding branch of HEAD.
+func (repo *Repository) GetHEADBranch() (*Branch, error) {
+	stdout, err := NewCommand("symbolic-ref", "HEAD").RunInDir(repo.Path)
+	if err != nil {
+		return nil, err
+	}
+	stdout = strings.TrimSpace(stdout)
+
+	if !strings.HasPrefix(stdout, BRANCH_PREFIX) {
+		return nil, fmt.Errorf("invalid HEAD branch: %v", stdout)
+	}
+
+	return &Branch{
+		Name: stdout[len(BRANCH_PREFIX):],
+		Path: stdout,
+	}, nil
+}
+
+// SetDefaultBranch sets default branch of repository.
+func (repo *Repository) SetDefaultBranch(name string) error {
+	if version.Compare(gitVersion, "1.7.10", "<") {
+		return ErrUnsupportedVersion{"1.7.10"}
+	}
+
+	_, err := NewCommand("symbolic-ref", "HEAD", BRANCH_PREFIX+name).RunInDir(repo.Path)
+	return err
+}
+
+// GetBranches returns all branches of the repository.
+func (repo *Repository) GetBranches() ([]string, error) {
+	stdout, err := NewCommand("show-ref", "--heads").RunInDir(repo.Path)
+	if err != nil {
+		return nil, err
+	}
+
+	infos := strings.Split(stdout, "\n")
+	branches := make([]string, len(infos)-1)
+	for i, info := range infos[:len(infos)-1] {
+		fields := strings.Fields(info)
+		if len(fields) != 2 {
+			continue // NOTE: I should believe git will not give me wrong string.
+		}
+		branches[i] = strings.TrimPrefix(fields[1], BRANCH_PREFIX)
+	}
+	return branches, nil
+}
+
+// Option(s) for delete branch
+type DeleteBranchOptions struct {
+	Force bool
+}
+
+// DeleteBranch deletes a branch from given repository path.
+func DeleteBranch(repoPath, name string, opts DeleteBranchOptions) error {
+	cmd := NewCommand("branch")
+
+	if opts.Force {
+		cmd.AddArguments("-D")
+	} else {
+		cmd.AddArguments("-d")
+	}
+
+	cmd.AddArguments(name)
+	_, err := cmd.RunInDir(repoPath)
+
+	return err
+}
+
+// DeleteBranch deletes a branch from repository.
+func (repo *Repository) DeleteBranch(name string, opts DeleteBranchOptions) error {
+	return DeleteBranch(repo.Path, name, opts)
+}
+
+// AddRemote adds a new remote to repository.
+func (repo *Repository) AddRemote(name, url string, fetch bool) error {
+	cmd := NewCommand("remote", "add")
+	if fetch {
+		cmd.AddArguments("-f")
+	}
+	cmd.AddArguments(name, url)
+
+	_, err := cmd.RunInDir(repo.Path)
+	return err
+}
+
+// RemoveRemote removes a remote from repository.
+func (repo *Repository) RemoveRemote(name string) error {
+	_, err := NewCommand("remote", "remove", name).RunInDir(repo.Path)
+	return err
+}
diff --git a/vendor/github.com/gogs/git-module/repo_commit.go b/vendor/github.com/gogs/git-module/repo_commit.go
new file mode 100644
index 00000000..6b629d4d
--- /dev/null
+++ b/vendor/github.com/gogs/git-module/repo_commit.go
@@ -0,0 +1,381 @@
+// 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 git
+
+import (
+	"bytes"
+	"container/list"
+	"fmt"
+	"strconv"
+	"strings"
+
+	"github.com/mcuadros/go-version"
+)
+
+const REMOTE_PREFIX = "refs/remotes/"
+
+// getRefCommitID returns the last commit ID string of given reference (branch or tag).
+func (repo *Repository) getRefCommitID(name string) (string, error) {
+	stdout, err := NewCommand("show-ref", "--verify", name).RunInDir(repo.Path)
+	if err != nil {
+		if strings.Contains(err.Error(), "not a valid ref") {
+			return "", ErrNotExist{name, ""}
+		}
+		return "", err
+	}
+	return strings.Split(stdout, " ")[0], nil
+}
+
+// GetBranchCommitID returns last commit ID string of given branch.
+func (repo *Repository) GetBranchCommitID(name string) (string, error) {
+	return repo.getRefCommitID(BRANCH_PREFIX + name)
+}
+
+// GetTagCommitID returns last commit ID string of given tag.
+func (repo *Repository) GetTagCommitID(name string) (string, error) {
+	return repo.getRefCommitID(TAG_PREFIX + name)
+}
+
+// GetRemoteBranchCommitID returns last commit ID string of given remote branch.
+func (repo *Repository) GetRemoteBranchCommitID(name string) (string, error) {
+	return repo.getRefCommitID(REMOTE_PREFIX + name)
+}
+
+// parseCommitData parses commit information from the (uncompressed) raw
+// data from the commit object.
+// \n\n separate headers from message
+func parseCommitData(data []byte) (*Commit, error) {
+	commit := new(Commit)
+	commit.parents = make([]sha1, 0, 1)
+	// we now have the contents of the commit object. Let's investigate...
+	nextline := 0
+l:
+	for {
+		eol := bytes.IndexByte(data[nextline:], '\n')
+		switch {
+		case eol > 0:
+			line := data[nextline : nextline+eol]
+			spacepos := bytes.IndexByte(line, ' ')
+			reftype := line[:spacepos]
+			switch string(reftype) {
+			case "tree", "object":
+				id, err := NewIDFromString(string(line[spacepos+1:]))
+				if err != nil {
+					return nil, err
+				}
+				commit.Tree.ID = id
+			case "parent":
+				// A commit can have one or more parents
+				oid, err := NewIDFromString(string(line[spacepos+1:]))
+				if err != nil {
+					return nil, err
+				}
+				commit.parents = append(commit.parents, oid)
+			case "author", "tagger":
+				sig, err := newSignatureFromCommitline(line[spacepos+1:])
+				if err != nil {
+					return nil, err
+				}
+				commit.Author = sig
+			case "committer":
+				sig, err := newSignatureFromCommitline(line[spacepos+1:])
+				if err != nil {
+					return nil, err
+				}
+				commit.Committer = sig
+			}
+			nextline += eol + 1
+		case eol == 0:
+			commit.CommitMessage = string(data[nextline+1:])
+			break l
+		default:
+			break l
+		}
+	}
+	return commit, nil
+}
+
+func (repo *Repository) getCommit(id sha1) (*Commit, error) {
+	c, ok := repo.commitCache.Get(id.String())
+	if ok {
+		log("Hit cache: %s", id)
+		return c.(*Commit), nil
+	}
+
+	data, err := NewCommand("cat-file", "commit", id.String()).RunInDirBytes(repo.Path)
+	if err != nil {
+		if strings.Contains(err.Error(), "exit status 128") {
+			return nil, ErrNotExist{id.String(), ""}
+		}
+		return nil, err
+	}
+
+	commit, err := parseCommitData(data)
+	if err != nil {
+		return nil, err
+	}
+	commit.repo = repo
+	commit.ID = id
+
+	repo.commitCache.Set(id.String(), commit)
+	return commit, nil
+}
+
+// GetCommit returns commit object of by ID string.
+func (repo *Repository) GetCommit(commitID string) (*Commit, error) {
+	if len(commitID) != 40 {
+		var err error
+		commitID, err = NewCommand("rev-parse", commitID).RunInDir(repo.Path)
+		if err != nil {
+			if strings.Contains(err.Error(), "exit status 128") {
+				return nil, ErrNotExist{commitID, ""}
+			}
+			return nil, err
+		}
+	}
+	id, err := NewIDFromString(commitID)
+	if err != nil {
+		return nil, err
+	}
+
+	return repo.getCommit(id)
+}
+
+// GetBranchCommit returns the last commit of given branch.
+func (repo *Repository) GetBranchCommit(name string) (*Commit, error) {
+	commitID, err := repo.GetBranchCommitID(name)
+	if err != nil {
+		return nil, err
+	}
+	return repo.GetCommit(commitID)
+}
+
+// GetTagCommit returns the commit of given tag.
+func (repo *Repository) GetTagCommit(name string) (*Commit, error) {
+	commitID, err := repo.GetTagCommitID(name)
+	if err != nil {
+		return nil, err
+	}
+	return repo.GetCommit(commitID)
+}
+
+// GetRemoteBranchCommit returns the last commit of given remote branch.
+func (repo *Repository) GetRemoteBranchCommit(name string) (*Commit, error) {
+	commitID, err := repo.GetRemoteBranchCommitID(name)
+	if err != nil {
+		return nil, err
+	}
+	return repo.GetCommit(commitID)
+}
+
+func (repo *Repository) getCommitByPathWithID(id sha1, relpath string) (*Commit, error) {
+	// File name starts with ':' must be escaped.
+	if relpath[0] == ':' {
+		relpath = `\` + relpath
+	}
+
+	stdout, err := NewCommand("log", "-1", _PRETTY_LOG_FORMAT, id.String(), "--", relpath).RunInDir(repo.Path)
+	if err != nil {
+		return nil, err
+	}
+
+	id, err = NewIDFromString(stdout)
+	if err != nil {
+		return nil, err
+	}
+
+	return repo.getCommit(id)
+}
+
+// GetCommitByPath returns the last commit of relative path.
+func (repo *Repository) GetCommitByPath(relpath string) (*Commit, error) {
+	stdout, err := NewCommand("log", "-1", _PRETTY_LOG_FORMAT, "--", relpath).RunInDirBytes(repo.Path)
+	if err != nil {
+		return nil, err
+	}
+
+	commits, err := repo.parsePrettyFormatLogToList(stdout)
+	if err != nil {
+		return nil, err
+	}
+	return commits.Front().Value.(*Commit), nil
+}
+
+func (repo *Repository) CommitsByRangeSize(revision string, page, size int) (*list.List, error) {
+	stdout, err := NewCommand("log", revision, "--skip="+strconv.Itoa((page-1)*size),
+		"--max-count="+strconv.Itoa(size), _PRETTY_LOG_FORMAT).RunInDirBytes(repo.Path)
+	if err != nil {
+		return nil, err
+	}
+	return repo.parsePrettyFormatLogToList(stdout)
+}
+
+var DefaultCommitsPageSize = 30
+
+func (repo *Repository) CommitsByRange(revision string, page int) (*list.List, error) {
+	return repo.CommitsByRangeSize(revision, page, DefaultCommitsPageSize)
+}
+
+func (repo *Repository) searchCommits(id sha1, keyword string) (*list.List, error) {
+	stdout, err := NewCommand("log", id.String(), "-100", "-i", "--grep="+keyword, _PRETTY_LOG_FORMAT).RunInDirBytes(repo.Path)
+	if err != nil {
+		return nil, err
+	}
+	return repo.parsePrettyFormatLogToList(stdout)
+}
+
+func (repo *Repository) getFilesChanged(id1 string, id2 string) ([]string, error) {
+	stdout, err := NewCommand("diff", "--name-only", id1, id2).RunInDirBytes(repo.Path)
+	if err != nil {
+		return nil, err
+	}
+	return strings.Split(string(stdout), "\n"), nil
+}
+
+func (repo *Repository) FileCommitsCount(revision, file string) (int64, error) {
+	return commitsCount(repo.Path, revision, file)
+}
+
+func (repo *Repository) CommitsByFileAndRangeSize(revision, file string, page, size int) (*list.List, error) {
+	stdout, err := NewCommand("log", revision, "--skip="+strconv.Itoa((page-1)*size),
+		"--max-count="+strconv.Itoa(size), _PRETTY_LOG_FORMAT, "--", file).RunInDirBytes(repo.Path)
+	if err != nil {
+		return nil, err
+	}
+	return repo.parsePrettyFormatLogToList(stdout)
+}
+
+func (repo *Repository) CommitsByFileAndRange(revision, file string, page int) (*list.List, error) {
+	return repo.CommitsByFileAndRangeSize(revision, file, page, DefaultCommitsPageSize)
+}
+
+func (repo *Repository) FilesCountBetween(startCommitID, endCommitID string) (int, error) {
+	stdout, err := NewCommand("diff", "--name-only", startCommitID+"..."+endCommitID).RunInDir(repo.Path)
+	if err != nil {
+		return 0, err
+	}
+	return len(strings.Split(stdout, "\n")) - 1, nil
+}
+
+// CommitsBetween returns a list that contains commits between [last, before).
+func (repo *Repository) CommitsBetween(last *Commit, before *Commit) (*list.List, error) {
+	if version.Compare(gitVersion, "1.8.0", ">=") {
+		stdout, err := NewCommand("rev-list", before.ID.String()+"..."+last.ID.String()).RunInDirBytes(repo.Path)
+		if err != nil {
+			return nil, err
+		}
+		return repo.parsePrettyFormatLogToList(bytes.TrimSpace(stdout))
+	}
+
+	// Fallback to stupid solution, which iterates all commits of the repository
+	// if before is not an ancestor of last.
+	l := list.New()
+	if last == nil || last.ParentCount() == 0 {
+		return l, nil
+	}
+
+	var err error
+	cur := last
+	for {
+		if cur.ID.Equal(before.ID) {
+			break
+		}
+		l.PushBack(cur)
+		if cur.ParentCount() == 0 {
+			break
+		}
+		cur, err = cur.Parent(0)
+		if err != nil {
+			return nil, err
+		}
+	}
+	return l, nil
+}
+
+func (repo *Repository) CommitsBetweenIDs(last, before string) (*list.List, error) {
+	lastCommit, err := repo.GetCommit(last)
+	if err != nil {
+		return nil, err
+	}
+	beforeCommit, err := repo.GetCommit(before)
+	if err != nil {
+		return nil, err
+	}
+	return repo.CommitsBetween(lastCommit, beforeCommit)
+}
+
+func (repo *Repository) CommitsCountBetween(start, end string) (int64, error) {
+	return commitsCount(repo.Path, start+"..."+end, "")
+}
+
+// The limit is depth, not total number of returned commits.
+func (repo *Repository) commitsBefore(l *list.List, parent *list.Element, id sha1, current, limit int) error {
+	// Reach the limit
+	if limit > 0 && current > limit {
+		return nil
+	}
+
+	commit, err := repo.getCommit(id)
+	if err != nil {
+		return fmt.Errorf("getCommit: %v", err)
+	}
+
+	var e *list.Element
+	if parent == nil {
+		e = l.PushBack(commit)
+	} else {
+		var in = parent
+		for {
+			if in == nil {
+				break
+			} else if in.Value.(*Commit).ID.Equal(commit.ID) {
+				return nil
+			} else if in.Next() == nil {
+				break
+			}
+
+			if in.Value.(*Commit).Committer.When.Equal(commit.Committer.When) {
+				break
+			}
+
+			if in.Value.(*Commit).Committer.When.After(commit.Committer.When) &&
+				in.Next().Value.(*Commit).Committer.When.Before(commit.Committer.When) {
+				break
+			}
+
+			in = in.Next()
+		}
+
+		e = l.InsertAfter(commit, in)
+	}
+
+	pr := parent
+	if commit.ParentCount() > 1 {
+		pr = e
+	}
+
+	for i := 0; i < commit.ParentCount(); i++ {
+		id, err := commit.ParentID(i)
+		if err != nil {
+			return err
+		}
+		err = repo.commitsBefore(l, pr, id, current+1, limit)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func (repo *Repository) getCommitsBefore(id sha1) (*list.List, error) {
+	l := list.New()
+	return l, repo.commitsBefore(l, nil, id, 1, 0)
+}
+
+func (repo *Repository) getCommitsBeforeLimit(id sha1, num int) (*list.List, error) {
+	l := list.New()
+	return l, repo.commitsBefore(l, nil, id, 1, num)
+}
diff --git a/vendor/github.com/gogs/git-module/repo_diff.go b/vendor/github.com/gogs/git-module/repo_diff.go
new file mode 100644
index 00000000..258a166f
--- /dev/null
+++ b/vendor/github.com/gogs/git-module/repo_diff.go
@@ -0,0 +1,400 @@
+// Copyright 2017 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 git
+
+import (
+	"bufio"
+	"bytes"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"strconv"
+	"strings"
+	"time"
+)
+
+// DiffLineType represents the type of a line in diff.
+type DiffLineType uint8
+
+const (
+	DIFF_LINE_PLAIN DiffLineType = iota + 1
+	DIFF_LINE_ADD
+	DIFF_LINE_DEL
+	DIFF_LINE_SECTION
+)
+
+// DiffFileType represents the file status in diff.
+type DiffFileType uint8
+
+const (
+	DIFF_FILE_ADD DiffFileType = iota + 1
+	DIFF_FILE_CHANGE
+	DIFF_FILE_DEL
+	DIFF_FILE_RENAME
+)
+
+// DiffLine represents a line in diff.
+type DiffLine struct {
+	LeftIdx  int
+	RightIdx int
+	Type     DiffLineType
+	Content  string
+}
+
+func (d *DiffLine) GetType() int {
+	return int(d.Type)
+}
+
+// DiffSection represents a section in diff.
+type DiffSection struct {
+	Name  string
+	Lines []*DiffLine
+}
+
+// Line returns a specific line by type (add or del) and file line number from a section.
+func (diffSection *DiffSection) Line(lineType DiffLineType, idx int) *DiffLine {
+	var (
+		difference    = 0
+		addCount      = 0
+		delCount      = 0
+		matchDiffLine *DiffLine
+	)
+
+LOOP:
+	for _, diffLine := range diffSection.Lines {
+		switch diffLine.Type {
+		case DIFF_LINE_ADD:
+			addCount++
+		case DIFF_LINE_DEL:
+			delCount++
+		default:
+			if matchDiffLine != nil {
+				break LOOP
+			}
+			difference = diffLine.RightIdx - diffLine.LeftIdx
+			addCount = 0
+			delCount = 0
+		}
+
+		switch lineType {
+		case DIFF_LINE_DEL:
+			if diffLine.RightIdx == 0 && diffLine.LeftIdx == idx-difference {
+				matchDiffLine = diffLine
+			}
+		case DIFF_LINE_ADD:
+			if diffLine.LeftIdx == 0 && diffLine.RightIdx == idx+difference {
+				matchDiffLine = diffLine
+			}
+		}
+	}
+
+	if addCount == delCount {
+		return matchDiffLine
+	}
+	return nil
+}
+
+// DiffFile represents a file in diff.
+type DiffFile struct {
+	Name               string
+	OldName            string
+	Index              string // 40-byte SHA, Changed/New: new SHA; Deleted: old SHA
+	Addition, Deletion int
+	Type               DiffFileType
+	IsCreated          bool
+	IsDeleted          bool
+	IsBin              bool
+	IsRenamed          bool
+	IsSubmodule        bool
+	Sections           []*DiffSection
+	IsIncomplete       bool
+}
+
+func (diffFile *DiffFile) GetType() int {
+	return int(diffFile.Type)
+}
+
+func (diffFile *DiffFile) NumSections() int {
+	return len(diffFile.Sections)
+}
+
+// Diff contains all information of a specific diff output.
+type Diff struct {
+	TotalAddition, TotalDeletion int
+	Files                        []*DiffFile
+	IsIncomplete                 bool
+}
+
+func (diff *Diff) NumFiles() int {
+	return len(diff.Files)
+}
+
+const _DIFF_HEAD = "diff --git "
+
+// ParsePatch takes a reader and parses everything it receives in diff format.
+func ParsePatch(done chan<- error, maxLines, maxLineCharacteres, maxFiles int, reader io.Reader) *Diff {
+	var (
+		diff = &Diff{Files: make([]*DiffFile, 0)}
+
+		curFile    *DiffFile
+		curSection = &DiffSection{
+			Lines: make([]*DiffLine, 0, 10),
+		}
+
+		leftLine, rightLine int
+		lineCount           int
+		curFileLinesCount   int
+	)
+	input := bufio.NewReader(reader)
+	isEOF := false
+	for !isEOF {
+		// TODO: would input.ReadBytes be more memory-efficient?
+		line, err := input.ReadString('\n')
+		if err != nil {
+			if err == io.EOF {
+				isEOF = true
+			} else {
+				done <- fmt.Errorf("ReadString: %v", err)
+				return nil
+			}
+		}
+
+		if len(line) > 0 && line[len(line)-1] == '\n' {
+			// Remove line break.
+			line = line[:len(line)-1]
+		}
+
+		if strings.HasPrefix(line, "+++ ") || strings.HasPrefix(line, "--- ") || len(line) == 0 {
+			continue
+		}
+
+		curFileLinesCount++
+		lineCount++
+
+		// Diff data too large, we only show the first about maxlines lines
+		if curFileLinesCount >= maxLines || len(line) >= maxLineCharacteres {
+			curFile.IsIncomplete = true
+		}
+
+		switch {
+		case line[0] == ' ':
+			diffLine := &DiffLine{Type: DIFF_LINE_PLAIN, Content: line, LeftIdx: leftLine, RightIdx: rightLine}
+			leftLine++
+			rightLine++
+			curSection.Lines = append(curSection.Lines, diffLine)
+			continue
+		case line[0] == '@':
+			curSection = &DiffSection{}
+			curFile.Sections = append(curFile.Sections, curSection)
+			ss := strings.Split(line, "@@")
+			diffLine := &DiffLine{Type: DIFF_LINE_SECTION, Content: line}
+			curSection.Lines = append(curSection.Lines, diffLine)
+
+			// Parse line number.
+			ranges := strings.Split(ss[1][1:], " ")
+			leftLine, _ = strconv.Atoi(strings.Split(ranges[0], ",")[0][1:])
+			if len(ranges) > 1 {
+				rightLine, _ = strconv.Atoi(strings.Split(ranges[1], ",")[0])
+			} else {
+				rightLine = leftLine
+			}
+			continue
+		case line[0] == '+':
+			curFile.Addition++
+			diff.TotalAddition++
+			diffLine := &DiffLine{Type: DIFF_LINE_ADD, Content: line, RightIdx: rightLine}
+			rightLine++
+			curSection.Lines = append(curSection.Lines, diffLine)
+			continue
+		case line[0] == '-':
+			curFile.Deletion++
+			diff.TotalDeletion++
+			diffLine := &DiffLine{Type: DIFF_LINE_DEL, Content: line, LeftIdx: leftLine}
+			if leftLine > 0 {
+				leftLine++
+			}
+			curSection.Lines = append(curSection.Lines, diffLine)
+		case strings.HasPrefix(line, "Binary"):
+			curFile.IsBin = true
+			continue
+		}
+
+		// Get new file.
+		if strings.HasPrefix(line, _DIFF_HEAD) {
+			middle := -1
+
+			// Note: In case file name is surrounded by double quotes (it happens only in git-shell).
+			// e.g. diff --git "a/xxx" "b/xxx"
+			hasQuote := line[len(_DIFF_HEAD)] == '"'
+			if hasQuote {
+				middle = strings.Index(line, ` "b/`)
+			} else {
+				middle = strings.Index(line, " b/")
+			}
+
+			beg := len(_DIFF_HEAD)
+			a := line[beg+2 : middle]
+			b := line[middle+3:]
+			if hasQuote {
+				a = string(UnescapeChars([]byte(a[1 : len(a)-1])))
+				b = string(UnescapeChars([]byte(b[1 : len(b)-1])))
+			}
+
+			curFile = &DiffFile{
+				Name:     a,
+				Type:     DIFF_FILE_CHANGE,
+				Sections: make([]*DiffSection, 0, 10),
+			}
+			diff.Files = append(diff.Files, curFile)
+			if len(diff.Files) >= maxFiles {
+				diff.IsIncomplete = true
+				io.Copy(ioutil.Discard, reader)
+				break
+			}
+			curFileLinesCount = 0
+
+			// Check file diff type and submodule.
+		CHECK_TYPE:
+			for {
+				line, err := input.ReadString('\n')
+				if err != nil {
+					if err == io.EOF {
+						isEOF = true
+					} else {
+						done <- fmt.Errorf("ReadString: %v", err)
+						return nil
+					}
+				}
+
+				switch {
+				case strings.HasPrefix(line, "new file"):
+					curFile.Type = DIFF_FILE_ADD
+					curFile.IsCreated = true
+					curFile.IsSubmodule = strings.HasSuffix(line, " 160000\n")
+				case strings.HasPrefix(line, "deleted"):
+					curFile.Type = DIFF_FILE_DEL
+					curFile.IsDeleted = true
+					curFile.IsSubmodule = strings.HasSuffix(line, " 160000\n")
+				case strings.HasPrefix(line, "index"):
+					if curFile.IsDeleted {
+						curFile.Index = line[6:46]
+					} else if len(line) >= 88 {
+						curFile.Index = line[49:88]
+					} else {
+						curFile.Index = curFile.Name
+					}
+					break CHECK_TYPE
+				case strings.HasPrefix(line, "similarity index 100%"):
+					curFile.Type = DIFF_FILE_RENAME
+					curFile.IsRenamed = true
+					curFile.OldName = curFile.Name
+					curFile.Name = b
+					curFile.Index = b
+					break CHECK_TYPE
+				case strings.HasPrefix(line, "old mode"):
+					break CHECK_TYPE
+				}
+			}
+		}
+	}
+
+	done <- nil
+	return diff
+}
+
+// GetDiffRange returns a parsed diff object between given commits.
+func GetDiffRange(repoPath, beforeCommitID, afterCommitID string, maxLines, maxLineCharacteres, maxFiles int) (*Diff, error) {
+	repo, err := OpenRepository(repoPath)
+	if err != nil {
+		return nil, err
+	}
+
+	commit, err := repo.GetCommit(afterCommitID)
+	if err != nil {
+		return nil, err
+	}
+
+	cmd := NewCommand()
+	if len(beforeCommitID) == 0 {
+		// First commit of repository
+		if commit.ParentCount() == 0 {
+			cmd.AddArguments("show", "--full-index", afterCommitID)
+		} else {
+			c, _ := commit.Parent(0)
+			cmd.AddArguments("diff", "--full-index", "-M", c.ID.String(), afterCommitID)
+		}
+	} else {
+		cmd.AddArguments("diff", "--full-index", "-M", beforeCommitID, afterCommitID)
+	}
+
+	stdout, w := io.Pipe()
+	done := make(chan error)
+	var diff *Diff
+	go func() {
+		diff = ParsePatch(done, maxLines, maxLineCharacteres, maxFiles, stdout)
+	}()
+
+	stderr := new(bytes.Buffer)
+	err = cmd.RunInDirTimeoutPipeline(2*time.Minute, repoPath, w, stderr)
+	w.Close() // Close writer to exit parsing goroutine
+	if err != nil {
+		return nil, concatenateError(err, stderr.String())
+	}
+
+	return diff, <-done
+}
+
+// RawDiffType represents the type of raw diff format.
+type RawDiffType string
+
+const (
+	RAW_DIFF_NORMAL RawDiffType = "diff"
+	RAW_DIFF_PATCH  RawDiffType = "patch"
+)
+
+// GetRawDiff dumps diff results of repository in given commit ID to io.Writer.
+func GetRawDiff(repoPath, commitID string, diffType RawDiffType, writer io.Writer) error {
+	repo, err := OpenRepository(repoPath)
+	if err != nil {
+		return fmt.Errorf("OpenRepository: %v", err)
+	}
+
+	commit, err := repo.GetCommit(commitID)
+	if err != nil {
+		return err
+	}
+
+	cmd := NewCommand()
+	switch diffType {
+	case RAW_DIFF_NORMAL:
+		if commit.ParentCount() == 0 {
+			cmd.AddArguments("show", commitID)
+		} else {
+			c, _ := commit.Parent(0)
+			cmd.AddArguments("diff", "-M", c.ID.String(), commitID)
+		}
+	case RAW_DIFF_PATCH:
+		if commit.ParentCount() == 0 {
+			cmd.AddArguments("format-patch", "--no-signature", "--stdout", "--root", commitID)
+		} else {
+			c, _ := commit.Parent(0)
+			query := fmt.Sprintf("%s...%s", commitID, c.ID.String())
+			cmd.AddArguments("format-patch", "--no-signature", "--stdout", query)
+		}
+	default:
+		return fmt.Errorf("invalid diffType: %s", diffType)
+	}
+
+	stderr := new(bytes.Buffer)
+	if err = cmd.RunInDirPipeline(repoPath, writer, stderr); err != nil {
+		return concatenateError(err, stderr.String())
+	}
+	return nil
+}
+
+// GetDiffCommit returns a parsed diff object of given commit.
+func GetDiffCommit(repoPath, commitID string, maxLines, maxLineCharacteres, maxFiles int) (*Diff, error) {
+	return GetDiffRange(repoPath, "", commitID, maxLines, maxLineCharacteres, maxFiles)
+}
diff --git a/vendor/github.com/gogs/git-module/repo_hook.go b/vendor/github.com/gogs/git-module/repo_hook.go
new file mode 100644
index 00000000..7b49647e
--- /dev/null
+++ b/vendor/github.com/gogs/git-module/repo_hook.go
@@ -0,0 +1,13 @@
+// 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 git
+
+func (repo *Repository) GetHook(name string) (*Hook, error) {
+	return GetHook(repo.Path, name)
+}
+
+func (repo *Repository) Hooks() ([]*Hook, error) {
+	return ListHooks(repo.Path)
+}
diff --git a/vendor/github.com/gogs/git-module/repo_object.go b/vendor/github.com/gogs/git-module/repo_object.go
new file mode 100644
index 00000000..416ee459
--- /dev/null
+++ b/vendor/github.com/gogs/git-module/repo_object.go
@@ -0,0 +1,14 @@
+// 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.
+
+package git
+
+type ObjectType string
+
+const (
+	OBJECT_COMMIT ObjectType = "commit"
+	OBJECT_TREE   ObjectType = "tree"
+	OBJECT_BLOB   ObjectType = "blob"
+	OBJECT_TAG    ObjectType = "tag"
+)
diff --git a/vendor/github.com/gogs/git-module/repo_pull.go b/vendor/github.com/gogs/git-module/repo_pull.go
new file mode 100644
index 00000000..22ccb269
--- /dev/null
+++ b/vendor/github.com/gogs/git-module/repo_pull.go
@@ -0,0 +1,81 @@
+// 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 git
+
+import (
+	"container/list"
+	"fmt"
+	"strconv"
+	"strings"
+	"time"
+)
+
+// PullRequestInfo represents needed information for a pull request.
+type PullRequestInfo struct {
+	MergeBase string
+	Commits   *list.List
+	NumFiles  int
+}
+
+// GetMergeBase checks and returns merge base of two branches.
+func (repo *Repository) GetMergeBase(base, head string) (string, error) {
+	stdout, err := NewCommand("merge-base", base, head).RunInDir(repo.Path)
+	if err != nil {
+		if strings.Contains(err.Error(), "exit status 1") {
+			return "", ErrNoMergeBase{}
+		}
+		return "", err
+	}
+	return strings.TrimSpace(stdout), nil
+}
+
+// GetPullRequestInfo generates and returns pull request information
+// between base and head branches of repositories.
+func (repo *Repository) GetPullRequestInfo(basePath, baseBranch, headBranch string) (_ *PullRequestInfo, err error) {
+	var remoteBranch string
+
+	// We don't need a temporary remote for same repository.
+	if repo.Path != basePath {
+		// Add a temporary remote
+		tmpRemote := strconv.FormatInt(time.Now().UnixNano(), 10)
+		if err = repo.AddRemote(tmpRemote, basePath, true); err != nil {
+			return nil, fmt.Errorf("AddRemote: %v", err)
+		}
+		defer repo.RemoveRemote(tmpRemote)
+
+		remoteBranch = "remotes/" + tmpRemote + "/" + baseBranch
+	} else {
+		remoteBranch = baseBranch
+	}
+
+	prInfo := new(PullRequestInfo)
+	prInfo.MergeBase, err = repo.GetMergeBase(remoteBranch, headBranch)
+	if err != nil {
+		return nil, err
+	}
+
+	logs, err := NewCommand("log", prInfo.MergeBase+"..."+headBranch, _PRETTY_LOG_FORMAT).RunInDirBytes(repo.Path)
+	if err != nil {
+		return nil, err
+	}
+	prInfo.Commits, err = repo.parsePrettyFormatLogToList(logs)
+	if err != nil {
+		return nil, fmt.Errorf("parsePrettyFormatLogToList: %v", err)
+	}
+
+	// Count number of changed files.
+	stdout, err := NewCommand("diff", "--name-only", remoteBranch+"..."+headBranch).RunInDir(repo.Path)
+	if err != nil {
+		return nil, err
+	}
+	prInfo.NumFiles = len(strings.Split(stdout, "\n")) - 1
+
+	return prInfo, nil
+}
+
+// GetPatch generates and returns patch data between given revisions.
+func (repo *Repository) GetPatch(base, head string) ([]byte, error) {
+	return NewCommand("diff", "-p", "--binary", base, head).RunInDirBytes(repo.Path)
+}
diff --git a/vendor/github.com/gogs/git-module/repo_tag.go b/vendor/github.com/gogs/git-module/repo_tag.go
new file mode 100644
index 00000000..4cef496b
--- /dev/null
+++ b/vendor/github.com/gogs/git-module/repo_tag.go
@@ -0,0 +1,209 @@
+// 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 git
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/mcuadros/go-version"
+)
+
+const TAG_PREFIX = "refs/tags/"
+
+// IsTagExist returns true if given tag exists in the repository.
+func IsTagExist(repoPath, name string) bool {
+	return IsReferenceExist(repoPath, TAG_PREFIX+name)
+}
+
+func (repo *Repository) IsTagExist(name string) bool {
+	return IsTagExist(repo.Path, name)
+}
+
+func (repo *Repository) CreateTag(name, revision string) error {
+	_, err := NewCommand("tag", name, revision).RunInDir(repo.Path)
+	return err
+}
+
+func (repo *Repository) getTag(id sha1) (*Tag, error) {
+	t, ok := repo.tagCache.Get(id.String())
+	if ok {
+		log("Hit cache: %s", id)
+		return t.(*Tag), nil
+	}
+
+	// Get tag type
+	tp, err := NewCommand("cat-file", "-t", id.String()).RunInDir(repo.Path)
+	if err != nil {
+		return nil, err
+	}
+	tp = strings.TrimSpace(tp)
+
+	// Tag is a commit.
+	if ObjectType(tp) == OBJECT_COMMIT {
+		tag := &Tag{
+			ID:     id,
+			Object: id,
+			Type:   string(OBJECT_COMMIT),
+			repo:   repo,
+		}
+
+		repo.tagCache.Set(id.String(), tag)
+		return tag, nil
+	}
+
+	// Tag with message.
+	data, err := NewCommand("cat-file", "-p", id.String()).RunInDirBytes(repo.Path)
+	if err != nil {
+		return nil, err
+	}
+
+	tag, err := parseTagData(data)
+	if err != nil {
+		return nil, err
+	}
+
+	tag.ID = id
+	tag.repo = repo
+
+	repo.tagCache.Set(id.String(), tag)
+	return tag, nil
+}
+
+// GetTag returns a Git tag by given name.
+func (repo *Repository) GetTag(name string) (*Tag, error) {
+	stdout, err := NewCommand("show-ref", "--tags", name).RunInDir(repo.Path)
+	if err != nil {
+		return nil, err
+	}
+
+	id, err := NewIDFromString(strings.Split(stdout, " ")[0])
+	if err != nil {
+		return nil, err
+	}
+
+	tag, err := repo.getTag(id)
+	if err != nil {
+		return nil, err
+	}
+	tag.Name = name
+	return tag, nil
+}
+
+// GetTags returns all tags of the repository.
+func (repo *Repository) GetTags() ([]string, error) {
+	cmd := NewCommand("tag", "-l")
+	if version.Compare(gitVersion, "2.0.0", ">=") {
+		cmd.AddArguments("--sort=-v:refname")
+	}
+
+	stdout, err := cmd.RunInDir(repo.Path)
+	if err != nil {
+		return nil, err
+	}
+
+	tags := strings.Split(stdout, "\n")
+	tags = tags[:len(tags)-1]
+
+	if version.Compare(gitVersion, "2.0.0", "<") {
+		version.Sort(tags)
+
+		// Reverse order
+		for i := 0; i < len(tags)/2; i++ {
+			j := len(tags) - i - 1
+			tags[i], tags[j] = tags[j], tags[i]
+		}
+	}
+
+	return tags, nil
+}
+
+type TagsResult struct {
+	// Indicates whether results include the latest tag.
+	HasLatest bool
+	// If results do not include the latest tag, a indicator 'after' to go back.
+	PreviousAfter string
+	// Indicates whether results include the oldest tag.
+	ReachEnd bool
+	// List of returned tags.
+	Tags []string
+}
+
+// GetTagsAfter returns list of tags 'after' (exlusive) given tag.
+func (repo *Repository) GetTagsAfter(after string, limit int) (*TagsResult, error) {
+	allTags, err := repo.GetTags()
+	if err != nil {
+		return nil, fmt.Errorf("GetTags: %v", err)
+	}
+
+	if limit < 0 {
+		limit = 0
+	}
+
+	numAllTags := len(allTags)
+	if len(after) == 0 && limit == 0 {
+		return &TagsResult{
+			HasLatest: true,
+			ReachEnd:  true,
+			Tags:      allTags,
+		}, nil
+	} else if len(after) == 0 && limit > 0 {
+		endIdx := limit
+		if limit >= numAllTags {
+			endIdx = numAllTags
+		}
+		return &TagsResult{
+			HasLatest: true,
+			ReachEnd:  limit >= numAllTags,
+			Tags:      allTags[:endIdx],
+		}, nil
+	}
+
+	previousAfter := ""
+	hasMatch := false
+	tags := make([]string, 0, len(allTags))
+	for i := range allTags {
+		if hasMatch {
+			tags = allTags[i:]
+			break
+		}
+		if allTags[i] == after {
+			hasMatch = true
+			if limit > 0 && i-limit >= 0 {
+				previousAfter = allTags[i-limit]
+			}
+			continue
+		}
+	}
+
+	if !hasMatch {
+		tags = allTags
+	}
+
+	// If all tags after match is equal to the limit, it reaches the oldest tag as well.
+	if limit == 0 || len(tags) <= limit {
+		return &TagsResult{
+			HasLatest:     !hasMatch,
+			PreviousAfter: previousAfter,
+			ReachEnd:      true,
+			Tags:          tags,
+		}, nil
+	}
+	return &TagsResult{
+		HasLatest:     !hasMatch,
+		PreviousAfter: previousAfter,
+		Tags:          tags[:limit],
+	}, nil
+}
+
+// DeleteTag deletes a tag from the repository
+func (repo *Repository) DeleteTag(name string) error {
+	cmd := NewCommand("tag", "-d")
+
+	cmd.AddArguments(name)
+	_, err := cmd.RunInDir(repo.Path)
+
+	return err
+}
diff --git a/vendor/github.com/gogs/git-module/repo_tree.go b/vendor/github.com/gogs/git-module/repo_tree.go
new file mode 100644
index 00000000..baebb251
--- /dev/null
+++ b/vendor/github.com/gogs/git-module/repo_tree.go
@@ -0,0 +1,26 @@
+// 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 git
+
+func (repo *Repository) getTree(id sha1) (*Tree, error) {
+	treePath := filepathFromSHA1(repo.Path, id.String())
+	if isFile(treePath) {
+		_, err := NewCommand("ls-tree", id.String()).RunInDir(repo.Path)
+		if err != nil {
+			return nil, ErrNotExist{id.String(), ""}
+		}
+	}
+
+	return NewTree(repo, id), nil
+}
+
+// Find the tree object in the repository.
+func (repo *Repository) GetTree(idStr string) (*Tree, error) {
+	id, err := NewIDFromString(idStr)
+	if err != nil {
+		return nil, err
+	}
+	return repo.getTree(id)
+}
diff --git a/vendor/github.com/gogs/git-module/sha1.go b/vendor/github.com/gogs/git-module/sha1.go
new file mode 100644
index 00000000..7744275d
--- /dev/null
+++ b/vendor/github.com/gogs/git-module/sha1.go
@@ -0,0 +1,93 @@
+// 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 git
+
+import (
+	"encoding/hex"
+	"fmt"
+	"strings"
+)
+
+const EMPTY_SHA = "0000000000000000000000000000000000000000"
+
+type sha1 [20]byte
+
+// Equal returns true if s has the same sha1 as caller.
+// Support 40-length-string, []byte, sha1.
+func (id sha1) Equal(s2 interface{}) bool {
+	switch v := s2.(type) {
+	case string:
+		if len(v) != 40 {
+			return false
+		}
+		return v == id.String()
+	case []byte:
+		if len(v) != 20 {
+			return false
+		}
+		for i, v := range v {
+			if id[i] != v {
+				return false
+			}
+		}
+	case sha1:
+		for i, v := range v {
+			if id[i] != v {
+				return false
+			}
+		}
+	default:
+		return false
+	}
+	return true
+}
+
+// String returns string (hex) representation of the Oid.
+func (s sha1) String() string {
+	result := make([]byte, 0, 40)
+	hexvalues := []byte("0123456789abcdef")
+	for i := 0; i < 20; i++ {
+		result = append(result, hexvalues[s[i]>>4])
+		result = append(result, hexvalues[s[i]&0xf])
+	}
+	return string(result)
+}
+
+// MustID always creates a new sha1 from a [20]byte array with no validation of input.
+func MustID(b []byte) sha1 {
+	var id sha1
+	for i := 0; i < 20; i++ {
+		id[i] = b[i]
+	}
+	return id
+}
+
+// NewID creates a new sha1 from a [20]byte array.
+func NewID(b []byte) (sha1, error) {
+	if len(b) != 20 {
+		return sha1{}, fmt.Errorf("Length must be 20: %v", b)
+	}
+	return MustID(b), nil
+}
+
+// MustIDFromString always creates a new sha from a ID with no validation of input.
+func MustIDFromString(s string) sha1 {
+	b, _ := hex.DecodeString(s)
+	return MustID(b)
+}
+
+// NewIDFromString creates a new sha1 from a ID string of length 40.
+func NewIDFromString(s string) (sha1, error) {
+	var id sha1
+	s = strings.TrimSpace(s)
+	if len(s) != 40 {
+		return id, fmt.Errorf("Length must be 40: %s", s)
+	}
+	b, err := hex.DecodeString(s)
+	if err != nil {
+		return id, err
+	}
+	return NewID(b)
+}
diff --git a/vendor/github.com/gogs/git-module/signature.go b/vendor/github.com/gogs/git-module/signature.go
new file mode 100644
index 00000000..95eb1bbe
--- /dev/null
+++ b/vendor/github.com/gogs/git-module/signature.go
@@ -0,0 +1,48 @@
+// 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 git
+
+import (
+	"bytes"
+	"strconv"
+	"time"
+)
+
+// Signature represents the Author or Committer information.
+type Signature struct {
+	Email string
+	Name  string
+	When  time.Time
+}
+
+// Helper to get a signature from the commit line, which looks like these:
+//     author Patrick Gundlach <gundlach@speedata.de> 1378823654 +0200
+//     author Patrick Gundlach <gundlach@speedata.de> Thu, 07 Apr 2005 22:13:13 +0200
+// but without the "author " at the beginning (this method should)
+// be used for author and committer.
+//
+// FIXME: include timezone for timestamp!
+func newSignatureFromCommitline(line []byte) (_ *Signature, err error) {
+	sig := new(Signature)
+	emailStart := bytes.IndexByte(line, '<')
+	sig.Name = string(line[:emailStart-1])
+	emailEnd := bytes.IndexByte(line, '>')
+	sig.Email = string(line[emailStart+1 : emailEnd])
+
+	// Check date format.
+	firstChar := line[emailEnd+2]
+	if firstChar >= 48 && firstChar <= 57 {
+		timestop := bytes.IndexByte(line[emailEnd+2:], ' ')
+		timestring := string(line[emailEnd+2 : emailEnd+2+timestop])
+		seconds, _ := strconv.ParseInt(timestring, 10, 64)
+		sig.When = time.Unix(seconds, 0)
+	} else {
+		sig.When, err = time.Parse("Mon Jan _2 15:04:05 2006 -0700", string(line[emailEnd+2:]))
+		if err != nil {
+			return nil, err
+		}
+	}
+	return sig, nil
+}
diff --git a/vendor/github.com/gogs/git-module/submodule.go b/vendor/github.com/gogs/git-module/submodule.go
new file mode 100644
index 00000000..57773300
--- /dev/null
+++ b/vendor/github.com/gogs/git-module/submodule.go
@@ -0,0 +1,78 @@
+// 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 git
+
+import "strings"
+
+type SubModule struct {
+	Name string
+	URL  string
+}
+
+// SubModuleFile represents a file with submodule type.
+type SubModuleFile struct {
+	*Commit
+
+	refURL string
+	refID  string
+}
+
+func NewSubModuleFile(c *Commit, refURL, refID string) *SubModuleFile {
+	return &SubModuleFile{
+		Commit: c,
+		refURL: refURL,
+		refID:  refID,
+	}
+}
+
+// RefURL guesses and returns reference URL.
+func (sf *SubModuleFile) RefURL(urlPrefix string, parentPath string) string {
+	if sf.refURL == "" {
+		return ""
+	}
+
+	url := strings.TrimSuffix(sf.refURL, ".git")
+
+	// git://xxx/user/repo
+	if strings.HasPrefix(url, "git://") {
+		return "http://" + strings.TrimPrefix(url, "git://")
+	}
+
+	// http[s]://xxx/user/repo
+	if strings.HasPrefix(url, "http://") || strings.HasPrefix(url, "https://") {
+		return url
+	}
+
+	// Relative url prefix check (according to git submodule documentation)
+	if strings.HasPrefix(url, "./") || strings.HasPrefix(url, "../") {
+		// ...construct and return correct submodule url here...
+		idx := strings.Index(parentPath, "/src/")
+		if idx == -1 {
+			return url
+		}
+		return strings.TrimSuffix(urlPrefix, "/") + parentPath[:idx] + "/" + url
+	}
+
+	// sysuser@xxx:user/repo
+	i := strings.Index(url, "@")
+	j := strings.LastIndex(url, ":")
+
+	// Only process when i < j because git+ssh://git@git.forwardbias.in/npploader.git
+	if i > -1 && j > -1 && i < j {
+		// fix problem with reverse proxy works only with local server
+		if strings.Contains(urlPrefix, url[i+1:j]) {
+			return urlPrefix + url[j+1:]
+		} else {
+			return "http://" + url[i+1:j] + "/" + url[j+1:]
+		}
+	}
+
+	return url
+}
+
+// RefID returns reference ID.
+func (sf *SubModuleFile) RefID() string {
+	return sf.refID
+}
diff --git a/vendor/github.com/gogs/git-module/tag.go b/vendor/github.com/gogs/git-module/tag.go
new file mode 100644
index 00000000..f4bf7792
--- /dev/null
+++ b/vendor/github.com/gogs/git-module/tag.go
@@ -0,0 +1,65 @@
+// 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 git
+
+import "bytes"
+
+// Tag represents a Git tag.
+type Tag struct {
+	Name    string
+	ID      sha1
+	repo    *Repository
+	Object  sha1 // The id of this commit object
+	Type    string
+	Tagger  *Signature
+	Message string
+}
+
+func (tag *Tag) Commit() (*Commit, error) {
+	return tag.repo.getCommit(tag.Object)
+}
+
+// Parse commit information from the (uncompressed) raw
+// data from the commit object.
+// \n\n separate headers from message
+func parseTagData(data []byte) (*Tag, error) {
+	tag := new(Tag)
+	// we now have the contents of the commit object. Let's investigate...
+	nextline := 0
+l:
+	for {
+		eol := bytes.IndexByte(data[nextline:], '\n')
+		switch {
+		case eol > 0:
+			line := data[nextline : nextline+eol]
+			spacepos := bytes.IndexByte(line, ' ')
+			reftype := line[:spacepos]
+			switch string(reftype) {
+			case "object":
+				id, err := NewIDFromString(string(line[spacepos+1:]))
+				if err != nil {
+					return nil, err
+				}
+				tag.Object = id
+			case "type":
+				// A commit can have one or more parents
+				tag.Type = string(line[spacepos+1:])
+			case "tagger":
+				sig, err := newSignatureFromCommitline(line[spacepos+1:])
+				if err != nil {
+					return nil, err
+				}
+				tag.Tagger = sig
+			}
+			nextline += eol + 1
+		case eol == 0:
+			tag.Message = string(data[nextline+1:])
+			break l
+		default:
+			break l
+		}
+	}
+	return tag, nil
+}
diff --git a/vendor/github.com/gogs/git-module/tree.go b/vendor/github.com/gogs/git-module/tree.go
new file mode 100644
index 00000000..789d4c9b
--- /dev/null
+++ b/vendor/github.com/gogs/git-module/tree.go
@@ -0,0 +1,149 @@
+// 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 git
+
+import (
+	"bytes"
+	"fmt"
+	"strings"
+)
+
+// Tree represents a flat directory listing.
+type Tree struct {
+	ID   sha1
+	repo *Repository
+
+	// parent tree
+	ptree *Tree
+
+	entries       Entries
+	entriesParsed bool
+}
+
+func NewTree(repo *Repository, id sha1) *Tree {
+	return &Tree{
+		ID:   id,
+		repo: repo,
+	}
+}
+
+// Predefine []byte variables to avoid runtime allocations.
+var (
+	escapedSlash = []byte(`\\`)
+	regularSlash = []byte(`\`)
+	escapedTab   = []byte(`\t`)
+	regularTab   = []byte("\t")
+)
+
+// UnescapeChars reverses escaped characters.
+func UnescapeChars(in []byte) []byte {
+	// LEGACY [Go 1.7]: use more expressive bytes.ContainsAny
+	if bytes.IndexAny(in, "\\\t") == -1 {
+		return in
+	}
+
+	out := bytes.Replace(in, escapedSlash, regularSlash, -1)
+	out = bytes.Replace(out, escapedTab, regularTab, -1)
+	return out
+}
+
+// parseTreeData parses tree information from the (uncompressed) raw
+// data from the tree object.
+func parseTreeData(tree *Tree, data []byte) ([]*TreeEntry, error) {
+	entries := make([]*TreeEntry, 0, 10)
+	l := len(data)
+	pos := 0
+	for pos < l {
+		entry := new(TreeEntry)
+		entry.ptree = tree
+		step := 6
+		switch string(data[pos : pos+step]) {
+		case "100644", "100664":
+			entry.mode = ENTRY_MODE_BLOB
+			entry.Type = OBJECT_BLOB
+		case "100755":
+			entry.mode = ENTRY_MODE_EXEC
+			entry.Type = OBJECT_BLOB
+		case "120000":
+			entry.mode = ENTRY_MODE_SYMLINK
+			entry.Type = OBJECT_BLOB
+		case "160000":
+			entry.mode = ENTRY_MODE_COMMIT
+			entry.Type = OBJECT_COMMIT
+
+			step = 8
+		case "040000":
+			entry.mode = ENTRY_MODE_TREE
+			entry.Type = OBJECT_TREE
+		default:
+			return nil, fmt.Errorf("unknown type: %v", string(data[pos:pos+step]))
+		}
+		pos += step + 6 // Skip string type of entry type.
+
+		step = 40
+		id, err := NewIDFromString(string(data[pos : pos+step]))
+		if err != nil {
+			return nil, err
+		}
+		entry.ID = id
+		pos += step + 1 // Skip half of sha1.
+
+		step = bytes.IndexByte(data[pos:], '\n')
+
+		// In case entry name is surrounded by double quotes(it happens only in git-shell).
+		if data[pos] == '"' {
+			entry.name = string(UnescapeChars(data[pos+1 : pos+step-1]))
+		} else {
+			entry.name = string(data[pos : pos+step])
+		}
+
+		pos += step + 1
+		entries = append(entries, entry)
+	}
+	return entries, nil
+}
+
+func (t *Tree) SubTree(rpath string) (*Tree, error) {
+	if len(rpath) == 0 {
+		return t, nil
+	}
+
+	paths := strings.Split(rpath, "/")
+	var (
+		err error
+		g   = t
+		p   = t
+		te  *TreeEntry
+	)
+	for _, name := range paths {
+		te, err = p.GetTreeEntryByPath(name)
+		if err != nil {
+			return nil, err
+		}
+
+		g, err = t.repo.getTree(te.ID)
+		if err != nil {
+			return nil, err
+		}
+		g.ptree = p
+		p = g
+	}
+	return g, nil
+}
+
+// ListEntries returns all entries of current tree.
+func (t *Tree) ListEntries() (Entries, error) {
+	if t.entriesParsed {
+		return t.entries, nil
+	}
+	t.entriesParsed = true
+
+	stdout, err := NewCommand("ls-tree", t.ID.String()).RunInDirBytes(t.repo.Path)
+	if err != nil {
+		return nil, err
+	}
+	t.entries, err = parseTreeData(t, stdout)
+	return t.entries, err
+}
diff --git a/vendor/github.com/gogs/git-module/tree_blob.go b/vendor/github.com/gogs/git-module/tree_blob.go
new file mode 100644
index 00000000..e2e70152
--- /dev/null
+++ b/vendor/github.com/gogs/git-module/tree_blob.go
@@ -0,0 +1,57 @@
+// 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 git
+
+import (
+	"path"
+	"strings"
+)
+
+func (t *Tree) GetTreeEntryByPath(relpath string) (*TreeEntry, error) {
+	if len(relpath) == 0 {
+		return &TreeEntry{
+			ID:   t.ID,
+			Type: OBJECT_TREE,
+			mode: ENTRY_MODE_TREE,
+		}, nil
+	}
+
+	relpath = path.Clean(relpath)
+	parts := strings.Split(relpath, "/")
+	var err error
+	tree := t
+	for i, name := range parts {
+		if i == len(parts)-1 {
+			entries, err := tree.ListEntries()
+			if err != nil {
+				return nil, err
+			}
+			for _, v := range entries {
+				if v.name == name {
+					return v, nil
+				}
+			}
+		} else {
+			tree, err = tree.SubTree(name)
+			if err != nil {
+				return nil, err
+			}
+		}
+	}
+	return nil, ErrNotExist{"", relpath}
+}
+
+func (t *Tree) GetBlobByPath(relpath string) (*Blob, error) {
+	entry, err := t.GetTreeEntryByPath(relpath)
+	if err != nil {
+		return nil, err
+	}
+
+	if !entry.IsDir() {
+		return entry.Blob(), nil
+	}
+
+	return nil, ErrNotExist{"", relpath}
+}
diff --git a/vendor/github.com/gogs/git-module/tree_entry.go b/vendor/github.com/gogs/git-module/tree_entry.go
new file mode 100644
index 00000000..54574035
--- /dev/null
+++ b/vendor/github.com/gogs/git-module/tree_entry.go
@@ -0,0 +1,226 @@
+// 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 git
+
+import (
+	"fmt"
+	"path"
+	"path/filepath"
+	"runtime"
+	"sort"
+	"strconv"
+	"strings"
+)
+
+type EntryMode int
+
+// There are only a few file modes in Git. They look like unix file modes, but they can only be
+// one of these.
+const (
+	ENTRY_MODE_BLOB    EntryMode = 0100644
+	ENTRY_MODE_EXEC    EntryMode = 0100755
+	ENTRY_MODE_SYMLINK EntryMode = 0120000
+	ENTRY_MODE_COMMIT  EntryMode = 0160000
+	ENTRY_MODE_TREE    EntryMode = 0040000
+)
+
+type TreeEntry struct {
+	ID   sha1
+	Type ObjectType
+
+	mode EntryMode
+	name string
+
+	ptree *Tree
+
+	commited bool
+
+	size  int64
+	sized bool
+}
+
+func (te *TreeEntry) Name() string {
+	return te.name
+}
+
+func (te *TreeEntry) Size() int64 {
+	if te.IsDir() {
+		return 0
+	} else if te.sized {
+		return te.size
+	}
+
+	stdout, err := NewCommand("cat-file", "-s", te.ID.String()).RunInDir(te.ptree.repo.Path)
+	if err != nil {
+		return 0
+	}
+
+	te.sized = true
+	te.size, _ = strconv.ParseInt(strings.TrimSpace(stdout), 10, 64)
+	return te.size
+}
+
+func (te *TreeEntry) IsSubModule() bool {
+	return te.mode == ENTRY_MODE_COMMIT
+}
+
+func (te *TreeEntry) IsDir() bool {
+	return te.mode == ENTRY_MODE_TREE
+}
+
+func (te *TreeEntry) IsLink() bool {
+	return te.mode == ENTRY_MODE_SYMLINK
+}
+
+func (te *TreeEntry) Blob() *Blob {
+	return &Blob{
+		repo:      te.ptree.repo,
+		TreeEntry: te,
+	}
+}
+
+type Entries []*TreeEntry
+
+var sorter = []func(t1, t2 *TreeEntry) bool{
+	func(t1, t2 *TreeEntry) bool {
+		return (t1.IsDir() || t1.IsSubModule()) && !t2.IsDir() && !t2.IsSubModule()
+	},
+	func(t1, t2 *TreeEntry) bool {
+		return t1.name < t2.name
+	},
+}
+
+func (tes Entries) Len() int      { return len(tes) }
+func (tes Entries) Swap(i, j int) { tes[i], tes[j] = tes[j], tes[i] }
+func (tes Entries) Less(i, j int) bool {
+	t1, t2 := tes[i], tes[j]
+	var k int
+	for k = 0; k < len(sorter)-1; k++ {
+		sort := sorter[k]
+		switch {
+		case sort(t1, t2):
+			return true
+		case sort(t2, t1):
+			return false
+		}
+	}
+	return sorter[k](t1, t2)
+}
+
+func (tes Entries) Sort() {
+	sort.Sort(tes)
+}
+
+var defaultConcurrency = runtime.NumCPU()
+
+type commitInfo struct {
+	entryName string
+	infos     []interface{}
+	err       error
+}
+
+// GetCommitsInfo takes advantages of concurrency to speed up getting information
+// of all commits that are corresponding to these entries. This method will automatically
+// choose the right number of goroutine (concurrency) to use related of the host CPU.
+func (tes Entries) GetCommitsInfo(commit *Commit, treePath string) ([][]interface{}, error) {
+	return tes.GetCommitsInfoWithCustomConcurrency(commit, treePath, 0)
+}
+
+// GetCommitsInfoWithCustomConcurrency takes advantages of concurrency to speed up getting information
+// of all commits that are corresponding to these entries. If the given maxConcurrency is negative or
+// equal to zero:  the right number of goroutine (concurrency) to use will be choosen related of the
+// host CPU.
+func (tes Entries) GetCommitsInfoWithCustomConcurrency(commit *Commit, treePath string, maxConcurrency int) ([][]interface{}, error) {
+	if len(tes) == 0 {
+		return nil, nil
+	}
+
+	if maxConcurrency <= 0 {
+		maxConcurrency = defaultConcurrency
+	}
+
+	// Length of taskChan determines how many goroutines (subprocesses) can run at the same time.
+	// The length of revChan should be same as taskChan so goroutines whoever finished job can
+	// exit as early as possible, only store data inside channel.
+	taskChan := make(chan bool, maxConcurrency)
+	revChan := make(chan commitInfo, maxConcurrency)
+	doneChan := make(chan error)
+
+	// Receive loop will exit when it collects same number of data pieces as tree entries.
+	// It notifies doneChan before exits or notify early with possible error.
+	infoMap := make(map[string][]interface{}, len(tes))
+	go func() {
+		i := 0
+		for info := range revChan {
+			if info.err != nil {
+				doneChan <- info.err
+				return
+			}
+
+			infoMap[info.entryName] = info.infos
+			i++
+			if i == len(tes) {
+				break
+			}
+		}
+		doneChan <- nil
+	}()
+
+	for i := range tes {
+		// When taskChan is idle (or has empty slots), put operation will not block.
+		// However when taskChan is full, code will block and wait any running goroutines to finish.
+		taskChan <- true
+
+		if tes[i].Type != OBJECT_COMMIT {
+			go func(i int) {
+				cinfo := commitInfo{entryName: tes[i].Name()}
+				c, err := commit.GetCommitByPath(filepath.Join(treePath, tes[i].Name()))
+				if err != nil {
+					cinfo.err = fmt.Errorf("GetCommitByPath (%s/%s): %v", treePath, tes[i].Name(), err)
+				} else {
+					cinfo.infos = []interface{}{tes[i], c}
+				}
+				revChan <- cinfo
+				<-taskChan // Clear one slot from taskChan to allow new goroutines to start.
+			}(i)
+			continue
+		}
+
+		// Handle submodule
+		go func(i int) {
+			cinfo := commitInfo{entryName: tes[i].Name()}
+			sm, err := commit.GetSubModule(path.Join(treePath, tes[i].Name()))
+			if err != nil && !IsErrNotExist(err) {
+				cinfo.err = fmt.Errorf("GetSubModule (%s/%s): %v", treePath, tes[i].Name(), err)
+				revChan <- cinfo
+				return
+			}
+
+			smURL := ""
+			if sm != nil {
+				smURL = sm.URL
+			}
+
+			c, err := commit.GetCommitByPath(filepath.Join(treePath, tes[i].Name()))
+			if err != nil {
+				cinfo.err = fmt.Errorf("GetCommitByPath (%s/%s): %v", treePath, tes[i].Name(), err)
+			} else {
+				cinfo.infos = []interface{}{tes[i], NewSubModuleFile(c, smURL, tes[i].ID.String())}
+			}
+			revChan <- cinfo
+			<-taskChan
+		}(i)
+	}
+
+	if err := <-doneChan; err != nil {
+		return nil, err
+	}
+
+	commitsInfo := make([][]interface{}, len(tes))
+	for i := 0; i < len(tes); i++ {
+		commitsInfo[i] = infoMap[tes[i].Name()]
+	}
+	return commitsInfo, nil
+}
diff --git a/vendor/github.com/gogs/git-module/utils.go b/vendor/github.com/gogs/git-module/utils.go
new file mode 100644
index 00000000..da8c5817
--- /dev/null
+++ b/vendor/github.com/gogs/git-module/utils.go
@@ -0,0 +1,93 @@
+// 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 git
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+	"sync"
+)
+
+// objectCache provides thread-safe cache opeations.
+type objectCache struct {
+	lock  sync.RWMutex
+	cache map[string]interface{}
+}
+
+func newObjectCache() *objectCache {
+	return &objectCache{
+		cache: make(map[string]interface{}, 10),
+	}
+}
+
+func (oc *objectCache) Set(id string, obj interface{}) {
+	oc.lock.Lock()
+	defer oc.lock.Unlock()
+
+	oc.cache[id] = obj
+}
+
+func (oc *objectCache) Get(id string) (interface{}, bool) {
+	oc.lock.RLock()
+	defer oc.lock.RUnlock()
+
+	obj, has := oc.cache[id]
+	return obj, has
+}
+
+// isDir returns true if given path is a directory,
+// or returns false when it's a file or does not exist.
+func isDir(dir string) bool {
+	f, e := os.Stat(dir)
+	if e != nil {
+		return false
+	}
+	return f.IsDir()
+}
+
+// isFile returns true if given path is a file,
+// or returns false when it's a directory or does not exist.
+func isFile(filePath string) bool {
+	f, e := os.Stat(filePath)
+	if e != nil {
+		return false
+	}
+	return !f.IsDir()
+}
+
+// isExist checks whether a file or directory exists.
+// It returns false when the file or directory does not exist.
+func isExist(path string) bool {
+	_, err := os.Stat(path)
+	return err == nil || os.IsExist(err)
+}
+
+func concatenateError(err error, stderr string) error {
+	if len(stderr) == 0 {
+		return err
+	}
+	return fmt.Errorf("%v - %s", err, stderr)
+}
+
+// If the object is stored in its own file (i.e not in a pack file),
+// this function returns the full path to the object file.
+// It does not test if the file exists.
+func filepathFromSHA1(rootdir, sha1 string) string {
+	return filepath.Join(rootdir, "objects", sha1[:2], sha1[2:])
+}
+
+func RefEndName(refStr string) string {
+	if strings.HasPrefix(refStr, BRANCH_PREFIX) {
+		return refStr[len(BRANCH_PREFIX):]
+	}
+
+	if strings.HasPrefix(refStr, TAG_PREFIX) {
+		return refStr[len(TAG_PREFIX):]
+	}
+
+	return refStr
+}