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2 files changed, 279 insertions, 235 deletions

diff --git a/models/git.go b/models/git.go
new file mode 100644
index 0000000000..6a4bd61064
--- /dev/null
+++ b/models/git.go
@@ -0,0 +1,272 @@
+// 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 models
+
+import (
+	"container/list"
+	"fmt"
+	"path"
+	"strings"
+
+	"github.com/Unknwon/com"
+
+	"github.com/gogits/git"
+)
+
+// RepoFile represents a file object in git repository.
+type RepoFile struct {
+	*git.TreeEntry
+	Path   string
+	Size   int64
+	Repo   *git.Repository
+	Commit *git.Commit
+}
+
+// LookupBlob returns the content of an object.
+func (file *RepoFile) LookupBlob() (*git.Blob, error) {
+	if file.Repo == nil {
+		return nil, ErrRepoFileNotLoaded
+	}
+
+	return file.Repo.LookupBlob(file.Id)
+}
+
+// GetBranches returns all branches of given repository.
+func GetBranches(userName, reposName string) ([]string, error) {
+	repo, err := git.OpenRepository(RepoPath(userName, reposName))
+	if err != nil {
+		return nil, err
+	}
+
+	refs, err := repo.AllReferences()
+	if err != nil {
+		return nil, err
+	}
+
+	brs := make([]string, len(refs))
+	for i, ref := range refs {
+		brs[i] = ref.Name
+	}
+	return brs, nil
+}
+
+func GetTargetFile(userName, reposName, branchName, commitId, rpath string) (*RepoFile, error) {
+	repo, err := git.OpenRepository(RepoPath(userName, reposName))
+	if err != nil {
+		return nil, err
+	}
+
+	commit, err := repo.GetCommit(branchName, commitId)
+	if err != nil {
+		return nil, err
+	}
+
+	parts := strings.Split(path.Clean(rpath), "/")
+
+	var entry *git.TreeEntry
+	tree := commit.Tree
+	for i, part := range parts {
+		if i == len(parts)-1 {
+			entry = tree.EntryByName(part)
+			if entry == nil {
+				return nil, ErrRepoFileNotExist
+			}
+		} else {
+			tree, err = repo.SubTree(tree, part)
+			if err != nil {
+				return nil, err
+			}
+		}
+	}
+
+	size, err := repo.ObjectSize(entry.Id)
+	if err != nil {
+		return nil, err
+	}
+
+	repoFile := &RepoFile{
+		entry,
+		rpath,
+		size,
+		repo,
+		commit,
+	}
+
+	return repoFile, nil
+}
+
+// GetReposFiles returns a list of file object in given directory of repository.
+func GetReposFiles(userName, reposName, branchName, commitId, rpath string) ([]*RepoFile, error) {
+	repo, err := git.OpenRepository(RepoPath(userName, reposName))
+	if err != nil {
+		return nil, err
+	}
+
+	commit, err := repo.GetCommit(branchName, commitId)
+	if err != nil {
+		return nil, err
+	}
+
+	var repodirs []*RepoFile
+	var repofiles []*RepoFile
+	commit.Tree.Walk(func(dirname string, entry *git.TreeEntry) int {
+		if dirname == rpath {
+			// TODO: size get method shoule be improved
+			size, err := repo.ObjectSize(entry.Id)
+			if err != nil {
+				return 0
+			}
+
+			var cm = commit
+			var i int
+			for {
+				i = i + 1
+				//fmt.Println(".....", i, cm.Id(), cm.ParentCount())
+				if cm.ParentCount() == 0 {
+					break
+				} else if cm.ParentCount() == 1 {
+					pt, _ := repo.SubTree(cm.Parent(0).Tree, dirname)
+					if pt == nil {
+						break
+					}
+					pEntry := pt.EntryByName(entry.Name)
+					if pEntry == nil || !pEntry.Id.Equal(entry.Id) {
+						break
+					} else {
+						cm = cm.Parent(0)
+					}
+				} else {
+					var emptyCnt = 0
+					var sameIdcnt = 0
+					var lastSameCm *git.Commit
+					//fmt.Println(".....", cm.ParentCount())
+					for i := 0; i < cm.ParentCount(); i++ {
+						//fmt.Println("parent", i, cm.Parent(i).Id())
+						p := cm.Parent(i)
+						pt, _ := repo.SubTree(p.Tree, dirname)
+						var pEntry *git.TreeEntry
+						if pt != nil {
+							pEntry = pt.EntryByName(entry.Name)
+						}
+
+						//fmt.Println("pEntry", pEntry)
+
+						if pEntry == nil {
+							emptyCnt = emptyCnt + 1
+							if emptyCnt+sameIdcnt == cm.ParentCount() {
+								if lastSameCm == nil {
+									goto loop
+								} else {
+									cm = lastSameCm
+									break
+								}
+							}
+						} else {
+							//fmt.Println(i, "pEntry", pEntry.Id, "entry", entry.Id)
+							if !pEntry.Id.Equal(entry.Id) {
+								goto loop
+							} else {
+								lastSameCm = cm.Parent(i)
+								sameIdcnt = sameIdcnt + 1
+								if emptyCnt+sameIdcnt == cm.ParentCount() {
+									// TODO: now follow the first parent commit?
+									cm = lastSameCm
+									//fmt.Println("sameId...")
+									break
+								}
+							}
+						}
+					}
+				}
+			}
+
+		loop:
+
+			rp := &RepoFile{
+				entry,
+				path.Join(dirname, entry.Name),
+				size,
+				repo,
+				cm,
+			}
+
+			if entry.IsFile() {
+				repofiles = append(repofiles, rp)
+			} else if entry.IsDir() {
+				repodirs = append(repodirs, rp)
+			}
+		}
+		return 0
+	})
+
+	return append(repodirs, repofiles...), nil
+}
+
+func GetCommit(userName, repoName, branchname, commitid string) (*git.Commit, error) {
+	repo, err := git.OpenRepository(RepoPath(userName, repoName))
+	if err != nil {
+		return nil, err
+	}
+
+	return repo.GetCommit(branchname, commitid)
+}
+
+// GetCommits returns all commits of given branch of repository.
+func GetCommits(userName, reposName, branchname string) (*list.List, error) {
+	repo, err := git.OpenRepository(RepoPath(userName, reposName))
+	if err != nil {
+		return nil, err
+	}
+	r, err := repo.LookupReference(fmt.Sprintf("refs/heads/%s", branchname))
+	if err != nil {
+		return nil, err
+	}
+	return r.AllCommits()
+}
+
+type DiffFile struct {
+	Name               string
+	Addition, Deletion int
+	Type               string
+	Content            []string
+}
+
+type Diff struct {
+	NumFiles                     int // Number of file has been changed.
+	TotalAddition, TotalDeletion int
+	Files                        []*DiffFile
+}
+
+func GetDiff(repoPath, commitid string) (*Diff, error) {
+	stdout, _, err := com.ExecCmdDir(repoPath, "git", "show", commitid)
+	if err != nil {
+		return nil, err
+	}
+
+	// Sperate parts by file.
+	parts := strings.Split(stdout, "diff --git ")
+
+	// First part is commit information.
+	// Check if it's a merge.
+	mergeIndex := strings.Index(parts[0], "merge")
+	if mergeIndex > -1 {
+		mergeCommit := strings.SplitN(strings.Split(parts[0], "\n")[1], "", 3)[2]
+		return GetDiff(repoPath, mergeCommit)
+	}
+
+	diff := &Diff{NumFiles: len(parts[1:])}
+	diff.Files = make([]*DiffFile, 0, diff.NumFiles)
+	for _, part := range parts[1:] {
+		infos := strings.SplitN(part, "\n", 6)
+		infos[5] = strings.TrimSuffix(strings.TrimSuffix(infos[5], "\n"), "\n\\ No newline at end of file")
+
+		file := &DiffFile{
+			Name:    strings.TrimPrefix(strings.Split(infos[0], " ")[0], "a/"),
+			Content: strings.Split(infos[5], "\n"),
+		}
+		diff.Files = append(diff.Files, file)
+	}
+	return diff, nil
+}
diff --git a/models/repo.go b/models/repo.go
index 824d5ba0ca..868a5dc2be 100644
--- a/models/repo.go
+++ b/models/repo.go
@@ -5,17 +5,14 @@
 package models
 
 import (
-	"container/list"
 	"errors"
 	"fmt"
 	"io/ioutil"
 	"os"
 	"os/exec"
-	"path"
 	"path/filepath"
 	"regexp"
 	"strings"
-	"sync"
 	"time"
 	"unicode/utf8"
 
@@ -36,8 +33,6 @@ var (
 	ErrRepoFileNotLoaded = fmt.Errorf("repo file not loaded")
 )
 
-var gitInitLocker = sync.Mutex{}
-
 var (
 	LanguageIgns, Licenses []string
 )
@@ -222,33 +217,21 @@ func extractGitBareZip(repoPath string) error {
 }
 
 // initRepoCommit temporarily changes with work directory.
-func initRepoCommit(tmpPath string, sig *git.Signature) error {
-	gitInitLocker.Lock()
-	defer gitInitLocker.Unlock()
-
-	// Change work directory.
-	curPath, err := os.Getwd()
-	if err != nil {
-		return err
-	} else if err = os.Chdir(tmpPath); err != nil {
-		return err
-	}
-	defer os.Chdir(curPath)
-
+func initRepoCommit(tmpPath string, sig *git.Signature) (err error) {
 	var stderr string
-	if _, stderr, err = com.ExecCmd("git", "add", "--all"); err != nil {
+	if _, stderr, err = com.ExecCmdDir(tmpPath, "git", "add", "--all"); err != nil {
 		return err
 	}
-	log.Info("stderr(1): %s", stderr)
-	if _, stderr, err = com.ExecCmd("git", "commit", fmt.Sprintf("--author='%s <%s>'", sig.Name, sig.Email),
+	log.Trace("stderr(1): %s", stderr)
+	if _, stderr, err = com.ExecCmdDir(tmpPath, "git", "commit", fmt.Sprintf("--author='%s <%s>'", sig.Name, sig.Email),
 		"-m", "Init commit"); err != nil {
 		return err
 	}
-	log.Info("stderr(2): %s", stderr)
-	if _, stderr, err = com.ExecCmd("git", "push", "origin", "master"); err != nil {
+	log.Trace("stderr(2): %s", stderr)
+	if _, stderr, err = com.ExecCmdDir(tmpPath, "git", "push", "origin", "master"); err != nil {
 		return err
 	}
-	log.Info("stderr(3): %s", stderr)
+	log.Trace("stderr(3): %s", stderr)
 	return nil
 }
 
@@ -562,214 +545,3 @@ func UnWatchRepository() {
 func ForkRepository(reposName string, userId int64) {
 
 }
-
-// RepoFile represents a file object in git repository.
-type RepoFile struct {
-	*git.TreeEntry
-	Path   string
-	Size   int64
-	Repo   *git.Repository
-	Commit *git.Commit
-}
-
-// LookupBlob returns the content of an object.
-func (file *RepoFile) LookupBlob() (*git.Blob, error) {
-	if file.Repo == nil {
-		return nil, ErrRepoFileNotLoaded
-	}
-
-	return file.Repo.LookupBlob(file.Id)
-}
-
-// GetBranches returns all branches of given repository.
-func GetBranches(userName, reposName string) ([]string, error) {
-	repo, err := git.OpenRepository(RepoPath(userName, reposName))
-	if err != nil {
-		return nil, err
-	}
-
-	refs, err := repo.AllReferences()
-	if err != nil {
-		return nil, err
-	}
-
-	brs := make([]string, len(refs))
-	for i, ref := range refs {
-		brs[i] = ref.Name
-	}
-	return brs, nil
-}
-
-func GetTargetFile(userName, reposName, branchName, commitId, rpath string) (*RepoFile, error) {
-	repo, err := git.OpenRepository(RepoPath(userName, reposName))
-	if err != nil {
-		return nil, err
-	}
-
-	commit, err := repo.GetCommit(branchName, commitId)
-	if err != nil {
-		return nil, err
-	}
-
-	parts := strings.Split(path.Clean(rpath), "/")
-
-	var entry *git.TreeEntry
-	tree := commit.Tree
-	for i, part := range parts {
-		if i == len(parts)-1 {
-			entry = tree.EntryByName(part)
-			if entry == nil {
-				return nil, ErrRepoFileNotExist
-			}
-		} else {
-			tree, err = repo.SubTree(tree, part)
-			if err != nil {
-				return nil, err
-			}
-		}
-	}
-
-	size, err := repo.ObjectSize(entry.Id)
-	if err != nil {
-		return nil, err
-	}
-
-	repoFile := &RepoFile{
-		entry,
-		rpath,
-		size,
-		repo,
-		commit,
-	}
-
-	return repoFile, nil
-}
-
-// GetReposFiles returns a list of file object in given directory of repository.
-func GetReposFiles(userName, reposName, branchName, commitId, rpath string) ([]*RepoFile, error) {
-	repo, err := git.OpenRepository(RepoPath(userName, reposName))
-	if err != nil {
-		return nil, err
-	}
-
-	commit, err := repo.GetCommit(branchName, commitId)
-	if err != nil {
-		return nil, err
-	}
-
-	var repodirs []*RepoFile
-	var repofiles []*RepoFile
-	commit.Tree.Walk(func(dirname string, entry *git.TreeEntry) int {
-		if dirname == rpath {
-			// TODO: size get method shoule be improved
-			size, err := repo.ObjectSize(entry.Id)
-			if err != nil {
-				return 0
-			}
-
-			var cm = commit
-			var i int
-			for {
-				i = i + 1
-				//fmt.Println(".....", i, cm.Id(), cm.ParentCount())
-				if cm.ParentCount() == 0 {
-					break
-				} else if cm.ParentCount() == 1 {
-					pt, _ := repo.SubTree(cm.Parent(0).Tree, dirname)
-					if pt == nil {
-						break
-					}
-					pEntry := pt.EntryByName(entry.Name)
-					if pEntry == nil || !pEntry.Id.Equal(entry.Id) {
-						break
-					} else {
-						cm = cm.Parent(0)
-					}
-				} else {
-					var emptyCnt = 0
-					var sameIdcnt = 0
-					var lastSameCm *git.Commit
-					//fmt.Println(".....", cm.ParentCount())
-					for i := 0; i < cm.ParentCount(); i++ {
-						//fmt.Println("parent", i, cm.Parent(i).Id())
-						p := cm.Parent(i)
-						pt, _ := repo.SubTree(p.Tree, dirname)
-						var pEntry *git.TreeEntry
-						if pt != nil {
-							pEntry = pt.EntryByName(entry.Name)
-						}
-
-						//fmt.Println("pEntry", pEntry)
-
-						if pEntry == nil {
-							emptyCnt = emptyCnt + 1
-							if emptyCnt+sameIdcnt == cm.ParentCount() {
-								if lastSameCm == nil {
-									goto loop
-								} else {
-									cm = lastSameCm
-									break
-								}
-							}
-						} else {
-							//fmt.Println(i, "pEntry", pEntry.Id, "entry", entry.Id)
-							if !pEntry.Id.Equal(entry.Id) {
-								goto loop
-							} else {
-								lastSameCm = cm.Parent(i)
-								sameIdcnt = sameIdcnt + 1
-								if emptyCnt+sameIdcnt == cm.ParentCount() {
-									// TODO: now follow the first parent commit?
-									cm = lastSameCm
-									//fmt.Println("sameId...")
-									break
-								}
-							}
-						}
-					}
-				}
-			}
-
-		loop:
-
-			rp := &RepoFile{
-				entry,
-				path.Join(dirname, entry.Name),
-				size,
-				repo,
-				cm,
-			}
-
-			if entry.IsFile() {
-				repofiles = append(repofiles, rp)
-			} else if entry.IsDir() {
-				repodirs = append(repodirs, rp)
-			}
-		}
-		return 0
-	})
-
-	return append(repodirs, repofiles...), nil
-}
-
-func GetCommit(userName, repoName, branchname, commitid string) (*git.Commit, error) {
-	repo, err := git.OpenRepository(RepoPath(userName, repoName))
-	if err != nil {
-		return nil, err
-	}
-
-	return repo.GetCommit(branchname, commitid)
-}
-
-// GetCommits returns all commits of given branch of repository.
-func GetCommits(userName, reposName, branchname string) (*list.List, error) {
-	repo, err := git.OpenRepository(RepoPath(userName, reposName))
-	if err != nil {
-		return nil, err
-	}
-	r, err := repo.LookupReference(fmt.Sprintf("refs/heads/%s", branchname))
-	if err != nil {
-		return nil, err
-	}
-	return r.AllCommits()
-}