Replace gogits/git-module dependency with go-gitea/git (#94)

* Replace gogits/git-module dependency with go-gitea/git

Fixes #92

* Remove git alias for git module import (not needed)

vendor/github.com/go-gitea/git/commit.go

@@ -0,0 +1,250 @@
+// 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"
+	"container/list"
+	"fmt"
+	"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.AddArguments("-c", "user.name="+opts.Committer.Name, "-c", "user.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) CommitsByRange(page int) (*list.List, error) {
+	return c.repo.commitsByRange(c.ID, 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
+}