Improve listing performance by using go-git (#6478)

* Use go-git for tree reading and commit info lookup.

Signed-off-by: Filip Navara <navara@emclient.com>

* Use TreeEntry.IsRegular() instead of ObjectType that was removed.

Signed-off-by: Filip Navara <navara@emclient.com>

* Use the treePath to optimize commit info search.

Signed-off-by: Filip Navara <navara@emclient.com>

* Extract the latest commit at treePath along with the other commits.

Signed-off-by: Filip Navara <navara@emclient.com>

* Fix listing commit info for a directory that was created in one commit and never modified after.

Signed-off-by: Filip Navara <navara@emclient.com>

* Avoid nearly all external 'git' invocations when doing directory listing (.editorconfig code path is still hit).

Signed-off-by: Filip Navara <navara@emclient.com>

* Use go-git for reading blobs.

Signed-off-by: Filip Navara <navara@emclient.com>

* Make SHA1 type alias for plumbing.Hash in go-git.

Signed-off-by: Filip Navara <navara@emclient.com>

* Make Signature type alias for object.Signature in go-git.

Signed-off-by: Filip Navara <navara@emclient.com>

* Fix GetCommitsInfo for repository with only one commit.

Signed-off-by: Filip Navara <navara@emclient.com>

* Fix PGP signature verification.

Signed-off-by: Filip Navara <navara@emclient.com>

* Fix issues with walking commit graph across merges.

Signed-off-by: Filip Navara <navara@emclient.com>

* Fix typo in condition.

Signed-off-by: Filip Navara <navara@emclient.com>

* Speed up loading branch list by keeping the repository reference (and thus all the loaded packfile indexes).

Signed-off-by: Filip Navara <navara@emclient.com>

* Fix lising submodules.

Signed-off-by: Filip Navara <navara@emclient.com>

* Fix build

Signed-off-by: Filip Navara <navara@emclient.com>

* Add back commit cache because of name-rev

Signed-off-by: Filip Navara <navara@emclient.com>

* Fix tests

Signed-off-by: Filip Navara <navara@emclient.com>

* Fix code style

* Fix spelling

* Address PR feedback

Signed-off-by: Filip Navara <navara@emclient.com>

* Update vendor module list

Signed-off-by: Filip Navara <navara@emclient.com>

* Fix getting trees by commit id

Signed-off-by: Filip Navara <navara@emclient.com>

* Fix remaining unit test failures

* Fix GetTreeBySHA

* Avoid running `git name-rev` if not necessary

Signed-off-by: Filip Navara <navara@emclient.com>

* Move Branch code to git module

* Clean up GPG signature verification and fix it for tagged commits

* Address PR feedback (import formatting, copyright headers)

* Make blob lookup by SHA working

* Update tests to use public API

* Allow getting content from any type of object through the blob interface

* Change test to actually expect the object content that is in the GIT repository

* Change one more test to actually expect the object content that is in the GIT repository

* Add comments

go.mod

 	github.com/dgrijalva/jwt-go v0.0.0-20161101193935-9ed569b5d1ac
 	github.com/edsrzf/mmap-go v0.0.0-20170320065105-0bce6a688712 // indirect
 	github.com/elazarl/go-bindata-assetfs v0.0.0-20151224045452-57eb5e1fc594 // indirect
-	github.com/emirpasic/gods v1.12.0 // indirect
+	github.com/emirpasic/gods v1.12.0
 	github.com/etcd-io/bbolt v1.3.2 // indirect
 	github.com/ethantkoenig/rupture v0.0.0-20180203182544-0a76f03a811a
 	github.com/facebookgo/clock v0.0.0-20150410010913-600d898af40a // indirect
 	gopkg.in/ldap.v3 v3.0.2
 	gopkg.in/macaron.v1 v1.3.2
 	gopkg.in/redis.v2 v2.3.2 // indirect
-	gopkg.in/src-d/go-billy.v4 v4.3.0 // indirect
+	gopkg.in/src-d/go-billy.v4 v4.3.0
 	gopkg.in/src-d/go-git.v4 v4.10.0
 	gopkg.in/testfixtures.v2 v2.5.0
 	mvdan.cc/xurls/v2 v2.0.0

integrations/api_repo_git_blobs_test.go

 	var gitBlobResponse api.GitBlobResponse
 	DecodeJSON(t, resp, &gitBlobResponse)
 	assert.NotNil(t, gitBlobResponse)
-	expectedContent := "Y29tbWl0IDY1ZjFiZjI3YmMzYmY3MGY2NDY1NzY1ODYzNWU2NjA5NGVkYmNiNGQKQXV0aG9yOiB1c2VyMSA8YWRkcmVzczFAZXhhbXBsZS5jb20+CkRhdGU6ICAgU3VuIE1hciAxOSAxNjo0Nzo1OSAyMDE3IC0wNDAwCgogICAgSW5pdGlhbCBjb21taXQKCmRpZmYgLS1naXQgYS9SRUFETUUubWQgYi9SRUFETUUubWQKbmV3IGZpbGUgbW9kZSAxMDA2NDQKaW5kZXggMDAwMDAwMC4uNGI0ODUxYQotLS0gL2Rldi9udWxsCisrKyBiL1JFQURNRS5tZApAQCAtMCwwICsxLDMgQEAKKyMgcmVwbzEKKworRGVzY3JpcHRpb24gZm9yIHJlcG8xClwgTm8gbmV3bGluZSBhdCBlbmQgb2YgZmlsZQo="
+	expectedContent := "dHJlZSAyYTJmMWQ0NjcwNzI4YTJlMTAwNDllMzQ1YmQ3YTI3NjQ2OGJlYWI2CmF1dGhvciB1c2VyMSA8YWRkcmVzczFAZXhhbXBsZS5jb20+IDE0ODk5NTY0NzkgLTA0MDAKY29tbWl0dGVyIEV0aGFuIEtvZW5pZyA8ZXRoYW50a29lbmlnQGdtYWlsLmNvbT4gMTQ4OTk1NjQ3OSAtMDQwMAoKSW5pdGlhbCBjb21taXQK"
 	assert.Equal(t, expectedContent, gitBlobResponse.Content)
 
 	// Tests a private repo with no token so will fail

models/error.go

 //  |______  / |__|  (____  /___|  /\___  >___|  /
 //         \/             \/     \/     \/     \/
 
-// ErrBranchNotExist represents a "BranchNotExist" kind of error.
-type ErrBranchNotExist struct {
-	Name string
-}
-
-// IsErrBranchNotExist checks if an error is a ErrBranchNotExist.
-func IsErrBranchNotExist(err error) bool {
-	_, ok := err.(ErrBranchNotExist)
-	return ok
-}
-
-func (err ErrBranchNotExist) Error() string {
-	return fmt.Sprintf("branch does not exist [name: %s]", err.Name)
-}
-
 // ErrBranchAlreadyExists represents an error that branch with such name already exists.
 type ErrBranchAlreadyExists struct {
 	BranchName string

models/pull.go

 // Copyright 2015 The Gogs Authors. All rights reserved.
+// Copyright 2019 The Gitea Authors. All rights reserved.
 // Use of this source code is governed by a MIT-style
 // license that can be found in the LICENSE file.
 
 
 func (pr *PullRequest) apiFormat(e Engine) *api.PullRequest {
 	var (
-		baseBranch *Branch
-		headBranch *Branch
+		baseBranch *git.Branch
+		headBranch *git.Branch
 		baseCommit *git.Commit
 		headCommit *git.Commit
 		err        error

models/repo_branch.go

 // Copyright 2016 The Gogs Authors. All rights reserved.
+// Copyright 2019 The Gitea Authors. All rights reserved.
 // Use of this source code is governed by a MIT-style
 // license that can be found in the LICENSE file.
 
 	return deleteLocalBranch(repo.LocalCopyPath(), repo.DefaultBranch, branchName)
 }
 
-// Branch holds the branch information
-type Branch struct {
-	Path string
-	Name string
-}
-
-// GetBranchesByPath returns a branch by it's path
-func GetBranchesByPath(path string) ([]*Branch, error) {
-	gitRepo, err := git.OpenRepository(path)
-	if err != nil {
-		return nil, err
-	}
-
-	brs, err := gitRepo.GetBranches()
-	if err != nil {
-		return nil, err
-	}
-
-	branches := make([]*Branch, len(brs))
-	for i := range brs {
-		branches[i] = &Branch{
-			Path: path,
-			Name: brs[i],
-		}
-	}
-	return branches, nil
-}
-
 // CanCreateBranch returns true if repository meets the requirements for creating new branches.
 func (repo *Repository) CanCreateBranch() bool {
 	return !repo.IsMirror
 }
 
-// GetBranch returns a branch by it's name
-func (repo *Repository) GetBranch(branch string) (*Branch, error) {
-	if !git.IsBranchExist(repo.RepoPath(), branch) {
-		return nil, ErrBranchNotExist{branch}
+// GetBranch returns a branch by its name
+func (repo *Repository) GetBranch(branch string) (*git.Branch, error) {
+	gitRepo, err := git.OpenRepository(repo.RepoPath())
+	if err != nil {
+		return nil, err
 	}
-	return &Branch{
-		Path: repo.RepoPath(),
-		Name: branch,
-	}, nil
+
+	return gitRepo.GetBranch(branch)
 }
 
 // GetBranches returns all the branches of a repository
-func (repo *Repository) GetBranches() ([]*Branch, error) {
-	return GetBranchesByPath(repo.RepoPath())
+func (repo *Repository) GetBranches() ([]*git.Branch, error) {
+	return git.GetBranchesByPath(repo.RepoPath())
 }
 
 // CheckBranchName validates branch name with existing repository branches
 
 	return nil
 }
-
-// GetCommit returns all the commits of a branch
-func (branch *Branch) GetCommit() (*git.Commit, error) {
-	gitRepo, err := git.OpenRepository(branch.Path)
-	if err != nil {
-		return nil, err
-	}
-	return gitRepo.GetBranchCommit(branch.Name)
-}

modules/context/repo.go

 	if treeEntry.Blob().Size() >= setting.UI.MaxDisplayFileSize {
 		return nil, git.ErrNotExist{ID: "", RelPath: ".editorconfig"}
 	}
-	reader, err := treeEntry.Blob().Data()
+	reader, err := treeEntry.Blob().DataAsync()
 	if err != nil {
 		return nil, err
 	}
+	defer reader.Close()
 	data, err := ioutil.ReadAll(reader)
 	if err != nil {
 		return nil, err

modules/git/blob.go

 // Copyright 2015 The Gogs Authors. All rights reserved.
+// Copyright 2019 The Gitea 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"
 	"encoding/base64"
-	"fmt"
 	"io"
 	"io/ioutil"
-	"os"
-	"os/exec"
+
+	"gopkg.in/src-d/go-git.v4/plumbing"
 )
 
 // 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
-}
+	ID SHA1
 
-// DataPipeline gets content of blob and write the result or error to stdout or stderr
-func (b *Blob) DataPipeline(stdout, stderr io.Writer) error {
-	return NewCommand("show", b.ID.String()).RunInDirPipeline(b.repo.Path, stdout, stderr)
-}
-
-type cmdReadCloser struct {
-	cmd    *exec.Cmd
-	stdout io.Reader
-}
-
-func (c cmdReadCloser) Read(p []byte) (int, error) {
-	return c.stdout.Read(p)
-}
-
-func (c cmdReadCloser) Close() error {
-	io.Copy(ioutil.Discard, c.stdout)
-	return c.cmd.Wait()
+	gogitEncodedObj plumbing.EncodedObject
+	name            string
 }
 
 // DataAsync gets a ReadCloser for the contents of a blob without reading it all.
 // Calling the Close function on the result will discard all unread output.
 func (b *Blob) DataAsync() (io.ReadCloser, error) {
-	cmd := exec.Command("git", "show", b.ID.String())
-	cmd.Dir = b.repo.Path
-	cmd.Stderr = os.Stderr
-
-	stdout, err := cmd.StdoutPipe()
-	if err != nil {
-		return nil, fmt.Errorf("StdoutPipe: %v", err)
-	}
+	return b.gogitEncodedObj.Reader()
+}
 
-	if err = cmd.Start(); err != nil {
-		return nil, fmt.Errorf("Start: %v", err)
-	}
+// Size returns the uncompressed size of the blob
+func (b *Blob) Size() int64 {
+	return b.gogitEncodedObj.Size()
+}
 
-	return cmdReadCloser{stdout: stdout, cmd: cmd}, nil
+// Name returns name of the tree entry this blob object was created from (or empty string)
+func (b *Blob) Name() string {
+	return b.name
 }
 
 // GetBlobContentBase64 Reads the content of the blob with a base64 encode and returns the encoded string

modules/git/blob_test.go

 // Copyright 2015 The Gogs Authors. All rights reserved.
+// Copyright 2019 The Gitea 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/ioutil"
 	"testing"
 
 	"github.com/stretchr/testify/require"
 )
 
-var repoSelf = &Repository{
-	Path: "./",
-}
-
-var testBlob = &Blob{
-	repo: repoSelf,
-	TreeEntry: &TreeEntry{
-		ID: MustIDFromString("a8d4b49dd073a4a38a7e58385eeff7cc52568697"),
-		ptree: &Tree{
-			repo: repoSelf,
-		},
-	},
-}
-
 func TestBlob_Data(t *testing.T) {
 	output := `Copyright (c) 2016 The Gitea Authors
 Copyright (c) 2015 The Gogs Authors
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 `
+	repo, err := OpenRepository("../../.git")
+	assert.NoError(t, err)
+	testBlob, err := repo.GetBlob("a8d4b49dd073a4a38a7e58385eeff7cc52568697")
+	assert.NoError(t, err)
 
-	r, err := testBlob.Data()
+	r, err := testBlob.DataAsync()
 	assert.NoError(t, err)
 	require.NotNil(t, r)
+	defer r.Close()
 
 	data, err := ioutil.ReadAll(r)
 	assert.NoError(t, err)
 }
 
 func Benchmark_Blob_Data(b *testing.B) {
-	for i := 0; i < b.N; i++ {
-		r, err := testBlob.Data()
-		if err != nil {
-			b.Fatal(err)
-		}
-		ioutil.ReadAll(r)
+	repo, err := OpenRepository("../../.git")
+	if err != nil {
+		b.Fatal(err)
+	}
+	testBlob, err := repo.GetBlob("a8d4b49dd073a4a38a7e58385eeff7cc52568697")
+	if err != nil {
+		b.Fatal(err)
 	}
-}
 
-func Benchmark_Blob_DataPipeline(b *testing.B) {
-	stdout := new(bytes.Buffer)
 	for i := 0; i < b.N; i++ {
-		stdout.Reset()
-		if err := testBlob.DataPipeline(stdout, nil); err != nil {
+		r, err := testBlob.DataAsync()
+		if err != nil {
 			b.Fatal(err)
 		}
+		defer r.Close()
+		ioutil.ReadAll(r)
 	}
 }

modules/git/commit.go

 	"net/http"
 	"strconv"
 	"strings"
+
+	"gopkg.in/src-d/go-git.v4/plumbing/object"
 )
 
 // Commit represents a git commit.
 	Payload   string //TODO check if can be reconstruct from the rest of commit information to not have duplicate data
 }
 
-// similar to https://github.com/git/git/blob/3bc53220cb2dcf709f7a027a3f526befd021d858/commit.c#L1128
-func newGPGSignatureFromCommitline(data []byte, signatureStart int, tag bool) (*CommitGPGSignature, error) {
-	sig := new(CommitGPGSignature)
-	signatureEnd := bytes.LastIndex(data, []byte("-----END PGP SIGNATURE-----"))
-	if signatureEnd == -1 {
-		return nil, fmt.Errorf("end of commit signature not found")
+func convertPGPSignature(c *object.Commit) *CommitGPGSignature {
+	if c.PGPSignature == "" {
+		return nil
+	}
+
+	var w strings.Builder
+	var err error
+
+	if _, err = fmt.Fprintf(&w, "tree %s\n", c.TreeHash.String()); err != nil {
+		return nil
+	}
+
+	for _, parent := range c.ParentHashes {
+		if _, err = fmt.Fprintf(&w, "parent %s\n", parent.String()); err != nil {
+			return nil
+		}
+	}
+
+	if _, err = fmt.Fprint(&w, "author "); err != nil {
+		return nil
 	}
-	sig.Signature = strings.Replace(string(data[signatureStart:signatureEnd+27]), "\n ", "\n", -1)
-	if tag {
-		sig.Payload = string(data[:signatureStart-1])
-	} else {
-		sig.Payload = string(data[:signatureStart-8]) + string(data[signatureEnd+27:])
+
+	if err = c.Author.Encode(&w); err != nil {
+		return nil
+	}
+
+	if _, err = fmt.Fprint(&w, "\ncommitter "); err != nil {
+		return nil
+	}
+
+	if err = c.Committer.Encode(&w); err != nil {
+		return nil
+	}
+
+	if _, err = fmt.Fprintf(&w, "\n\n%s", c.Message); err != nil {
+		return nil
+	}
+
+	return &CommitGPGSignature{
+		Signature: c.PGPSignature,
+		Payload:   w.String(),
+	}
+}
+
+func convertCommit(c *object.Commit) *Commit {
+	return &Commit{
+		ID:            c.Hash,
+		CommitMessage: c.Message,
+		Committer:     &c.Committer,
+		Author:        &c.Author,
+		Signature:     convertPGPSignature(c),
+		parents:       c.ParentHashes,
 	}
-	return sig, nil
 }
 
 // Message returns the commit message. Same as retrieving CommitMessage directly.
 		}
 		return nil, err
 	}
-	rd, err := entry.Blob().Data()
+
+	rd, err := entry.Blob().DataAsync()
 	if err != nil {
 		return nil, err
 	}
 
+	defer rd.Close()
 	scanner := bufio.NewScanner(rd)
 	c.submoduleCache = newObjectCache()
 	var ismodule bool
 	return nil, nil
 }
 
+// GetBranchName gets the closes branch name (as returned by 'git name-rev')
+func (c *Commit) GetBranchName() (string, error) {
+	data, err := NewCommand("name-rev", c.ID.String()).RunInDirBytes(c.repo.Path)
+	if err != nil {
+		return "", err
+	}
+
+	// name-rev commitID output will be "COMMIT_ID master" or "COMMIT_ID master~12"
+	return strings.Split(strings.Split(string(data), " ")[1], "~")[0], nil
+}
+
 // CommitFileStatus represents status of files in a commit.
 type CommitFileStatus struct {
 	Added    []string

modules/git/commit_info.go

 package git
 
 import (
-	"bufio"
-	"context"
-	"fmt"
-	"os/exec"
-	"path"
-	"runtime"
-	"strconv"
-	"strings"
-	"sync"
-	"time"
+	"github.com/emirpasic/gods/trees/binaryheap"
+	"gopkg.in/src-d/go-git.v4/plumbing"
+	"gopkg.in/src-d/go-git.v4/plumbing/object"
 )
 
-const (
-	// parameters for searching for commit infos. If the untargeted search has
-	// not found any entries in the past 5 commits, and 12 or fewer entries
-	// remain, then we'll just let the targeted-searching threads finish off,
-	// and stop the untargeted search to not interfere.
-	deferToTargetedSearchColdStreak          = 5
-	deferToTargetedSearchNumRemainingEntries = 12
-)
+// GetCommitsInfo gets information of all commits that are corresponding to these entries
+func (tes Entries) GetCommitsInfo(commit *Commit, treePath string, cache LastCommitCache) ([][]interface{}, *Commit, error) {
+	entryPaths := make([]string, len(tes)+1)
+	// Get the commit for the treePath itself
+	entryPaths[0] = ""
+	for i, entry := range tes {
+		entryPaths[i+1] = entry.Name()
+	}
 
-// getCommitsInfoState shared state while getting commit info for entries
-type getCommitsInfoState struct {
-	lock sync.Mutex
-	/* read-only fields, can be read without the mutex */
-	// entries and entryPaths are read-only after initialization, so they can
-	// safely be read without the mutex
-	entries []*TreeEntry
-	// set of filepaths to get info for
-	entryPaths map[string]struct{}
-	treePath   string
-	headCommit *Commit
+	c, err := commit.repo.gogitRepo.CommitObject(plumbing.Hash(commit.ID))
+	if err != nil {
+		return nil, nil, err
+	}
 
-	/* mutable fields, must hold mutex to read or write */
-	// map from filepath to commit
-	commits map[string]*Commit
-	// set of filepaths that have been or are being searched for in a target search
-	targetedPaths map[string]struct{}
-}
+	revs, err := getLastCommitForPaths(c, treePath, entryPaths)
+	if err != nil {
+		return nil, nil, err
+	}
 
-func (state *getCommitsInfoState) numRemainingEntries() int {
-	state.lock.Lock()
-	defer state.lock.Unlock()
-	return len(state.entries) - len(state.commits)
-}
+	commit.repo.gogitStorage.Close()
 
-// getTargetEntryPath Returns the next path for a targeted-searching thread to
-// search for, or returns the empty string if nothing left to search for
-func (state *getCommitsInfoState) getTargetedEntryPath() string {
-	var targetedEntryPath string
-	state.lock.Lock()
-	defer state.lock.Unlock()
-	for _, entry := range state.entries {
-		entryPath := path.Join(state.treePath, entry.Name())
-		if _, ok := state.commits[entryPath]; ok {
-			continue
-		} else if _, ok = state.targetedPaths[entryPath]; ok {
-			continue
+	commitsInfo := make([][]interface{}, len(tes))
+	for i, entry := range tes {
+		if rev, ok := revs[entry.Name()]; ok {
+			entryCommit := convertCommit(rev)
+			if entry.IsSubModule() {
+				subModuleURL := ""
+				if subModule, err := commit.GetSubModule(entry.Name()); err != nil {
+					return nil, nil, err
+				} else if subModule != nil {
+					subModuleURL = subModule.URL
+				}
+				subModuleFile := NewSubModuleFile(entryCommit, subModuleURL, entry.ID.String())
+				commitsInfo[i] = []interface{}{entry, subModuleFile}
+			} else {
+				commitsInfo[i] = []interface{}{entry, entryCommit}
+			}
+		} else {
+			commitsInfo[i] = []interface{}{entry, nil}
 		}
-		targetedEntryPath = entryPath
-		state.targetedPaths[entryPath] = struct{}{}
-		break
 	}
-	return targetedEntryPath
-}
 
-// repeatedly perform targeted searches for unpopulated entries
-func targetedSearch(state *getCommitsInfoState, done chan error, cache LastCommitCache) {
-	for {
-		entryPath := state.getTargetedEntryPath()
-		if len(entryPath) == 0 {
-			done <- nil
-			return
-		}
-		if cache != nil {
-			commit, err := cache.Get(state.headCommit.repo.Path, state.headCommit.ID.String(), entryPath)
-			if err == nil && commit != nil {
-				state.update(entryPath, commit)
-				continue
-			}
-		}
-		command := NewCommand("rev-list", "-1", state.headCommit.ID.String(), "--", entryPath)
-		output, err := command.RunInDir(state.headCommit.repo.Path)
-		if err != nil {
-			done <- err
-			return
-		}
-		id, err := NewIDFromString(strings.TrimSpace(output))
-		if err != nil {
-			done <- err
-			return
-		}
-		commit, err := state.headCommit.repo.getCommit(id)
-		if err != nil {
-			done <- err
-			return
-		}
-		state.update(entryPath, commit)
-		if cache != nil {
-			cache.Put(state.headCommit.repo.Path, state.headCommit.ID.String(), entryPath, commit)
-		}
+	// Retrieve the commit for the treePath itself (see above). We basically
+	// get it for free during the tree traversal and it's used for listing
+	// pages to display information about newest commit for a given path.
+	var treeCommit *Commit
+	if rev, ok := revs[""]; ok {
+		treeCommit = convertCommit(rev)
 	}
+	return commitsInfo, treeCommit, nil
 }
 
-func initGetCommitInfoState(entries Entries, headCommit *Commit, treePath string) *getCommitsInfoState {
-	entryPaths := make(map[string]struct{}, len(entries))
-	for _, entry := range entries {
-		entryPaths[path.Join(treePath, entry.Name())] = struct{}{}
-	}
-	if treePath = path.Clean(treePath); treePath == "." {
-		treePath = ""
-	}
-	return &getCommitsInfoState{
-		entries:       entries,
-		entryPaths:    entryPaths,
-		commits:       make(map[string]*Commit, len(entries)),
-		targetedPaths: make(map[string]struct{}, len(entries)),
-		treePath:      treePath,
-		headCommit:    headCommit,
-	}
+type commitAndPaths struct {
+	commit *object.Commit
+	// Paths that are still on the branch represented by commit
+	paths []string
+	// Set of hashes for the paths
+	hashes map[string]plumbing.Hash
 }
 
-// GetCommitsInfo gets information of all commits that are corresponding to these entries
-func (tes Entries) GetCommitsInfo(commit *Commit, treePath string, cache LastCommitCache) ([][]interface{}, error) {
-	state := initGetCommitInfoState(tes, commit, treePath)
-	if err := getCommitsInfo(state, cache); err != nil {
+func getCommitTree(c *object.Commit, treePath string) (*object.Tree, error) {
+	tree, err := c.Tree()
+	if err != nil {
 		return nil, err
 	}
-	if len(state.commits) < len(state.entryPaths) {
-		return nil, fmt.Errorf("could not find commits for all entries")
-	}
-
-	commitsInfo := make([][]interface{}, len(tes))
-	for i, entry := range tes {
-		commit, ok := state.commits[path.Join(treePath, entry.Name())]
-		if !ok {
-			return nil, fmt.Errorf("could not find commit for %s", entry.Name())
-		}
-		switch entry.Type {
-		case ObjectCommit:
-			subModuleURL := ""
-			if subModule, err := state.headCommit.GetSubModule(entry.Name()); err != nil {
-				return nil, err
-			} else if subModule != nil {
-				subModuleURL = subModule.URL
-			}
-			subModuleFile := NewSubModuleFile(commit, subModuleURL, entry.ID.String())
-			commitsInfo[i] = []interface{}{entry, subModuleFile}
-		default:
-			commitsInfo[i] = []interface{}{entry, commit}
-		}
-	}
-	return commitsInfo, nil
-}
 
-func (state *getCommitsInfoState) cleanEntryPath(rawEntryPath string) (string, error) {
-	if rawEntryPath[0] == '"' {
-		var err error
-		rawEntryPath, err = strconv.Unquote(rawEntryPath)
+	// Optimize deep traversals by focusing only on the specific tree
+	if treePath != "" {
+		tree, err = tree.Tree(treePath)
 		if err != nil {
-			return rawEntryPath, err
+			return nil, err
 		}
 	}
-	var entryNameStartIndex int
-	if len(state.treePath) > 0 {
-		entryNameStartIndex = len(state.treePath) + 1
-	}
 
-	if index := strings.IndexByte(rawEntryPath[entryNameStartIndex:], '/'); index >= 0 {
-		return rawEntryPath[:entryNameStartIndex+index], nil
-	}
-	return rawEntryPath, nil
+	return tree, nil
 }
 
-// update report that the given path was last modified by the given commit.
-// Returns whether state.commits was updated
-func (state *getCommitsInfoState) update(entryPath string, commit *Commit) bool {
-	if _, ok := state.entryPaths[entryPath]; !ok {
-		return false
-	}
-
-	var updated bool
-	state.lock.Lock()
-	defer state.lock.Unlock()
-	if _, ok := state.commits[entryPath]; !ok {
-		state.commits[entryPath] = commit
-		updated = true
+func getFullPath(treePath, path string) string {
+	if treePath != "" {
+		if path != "" {
+			return treePath + "/" + path
+		}
+		return treePath
 	}
-	return updated
+	return path
 }
 
-const getCommitsInfoPretty = "--pretty=format:%H %ct %s"
-
-func getCommitsInfo(state *getCommitsInfoState, cache LastCommitCache) error {
-	ctx, cancel := context.WithTimeout(context.Background(), 1*time.Minute)
-	defer cancel()
-
-	args := []string{"log", state.headCommit.ID.String(), getCommitsInfoPretty, "--name-status", "-c"}
-	if len(state.treePath) > 0 {
-		args = append(args, "--", state.treePath)
+func getFileHashes(c *object.Commit, treePath string, paths []string) (map[string]plumbing.Hash, error) {
+	tree, err := getCommitTree(c, treePath)
+	if err == object.ErrDirectoryNotFound {
+		// The whole tree didn't exist, so return empty map
+		return make(map[string]plumbing.Hash), nil
 	}
-	cmd := exec.CommandContext(ctx, "git", args...)
-	cmd.Dir = state.headCommit.repo.Path
-
-	readCloser, err := cmd.StdoutPipe()
 	if err != nil {
-		return err
+		return nil, err
 	}
 
-	if err := cmd.Start(); err != nil {
-		return err
+	hashes := make(map[string]plumbing.Hash)
+	for _, path := range paths {
+		if path != "" {
+			entry, err := tree.FindEntry(path)
+			if err == nil {
+				hashes[path] = entry.Hash
+			}
+		} else {
+			hashes[path] = tree.Hash
+		}
 	}
-	// it's okay to ignore the error returned by cmd.Wait(); we expect the
-	// subprocess to sometimes have a non-zero exit status, since we may
-	// prematurely close stdout, resulting in a broken pipe.
-	defer cmd.Wait()
 
-	numThreads := runtime.NumCPU()
-	done := make(chan error, numThreads)
-	for i := 0; i < numThreads; i++ {
-		go targetedSearch(state, done, cache)
-	}
+	return hashes, nil
+}
 
-	scanner := bufio.NewScanner(readCloser)
-	err = state.processGitLogOutput(scanner)
+func getLastCommitForPaths(c *object.Commit, treePath string, paths []string) (map[string]*object.Commit, error) {
+	// We do a tree traversal with nodes sorted by commit time
+	seen := make(map[plumbing.Hash]bool)
+	heap := binaryheap.NewWith(func(a, b interface{}) int {
+		if a.(*commitAndPaths).commit.Committer.When.Before(b.(*commitAndPaths).commit.Committer.When) {
+			return 1
+		}
+		return -1
+	})
 
-	// it is important that we close stdout here; if we do not close
-	// stdout, the subprocess will keep running, and the deffered call
-	// cmd.Wait() may block for a long time.
-	if closeErr := readCloser.Close(); closeErr != nil && err == nil {
-		err = closeErr
+	result := make(map[string]*object.Commit)
+	initialHashes, err := getFileHashes(c, treePath, paths)
+	if err != nil {
+		return nil, err
 	}
 
-	for i := 0; i < numThreads; i++ {
-		doneErr := <-done
-		if doneErr != nil && err == nil {
-			err = doneErr
+	// Start search from the root commit and with full set of paths
+	heap.Push(&commitAndPaths{c, paths, initialHashes})
+
+	for {
+		cIn, ok := heap.Pop()
+		if !ok {
+			break
 		}
-	}
-	return err
-}
+		current := cIn.(*commitAndPaths)
+		currentID := current.commit.ID()
 
-func (state *getCommitsInfoState) processGitLogOutput(scanner *bufio.Scanner) error {
-	// keep a local cache of seen paths to avoid acquiring a lock for paths
-	// we've already seen
-	seenPaths := make(map[string]struct{}, len(state.entryPaths))
-	// number of consecutive commits without any finds
-	coldStreak := 0
-	var commit *Commit
-	var err error
-	for scanner.Scan() {
-		line := scanner.Text()
-		if len(line) == 0 { // in-between commits
-			numRemainingEntries := state.numRemainingEntries()
-			if numRemainingEntries == 0 {
-				break
-			}
-			if coldStreak >= deferToTargetedSearchColdStreak &&
-				numRemainingEntries <= deferToTargetedSearchNumRemainingEntries {
-				// stop this untargeted search, and let the targeted-search threads
-				// finish the work
-				break
-			}
+		if seen[currentID] {
 			continue
 		}
-		if line[0] >= 'A' && line[0] <= 'X' { // a file was changed by the current commit
-			// look for the last tab, since for copies (C) and renames (R) two
-			// filenames are printed: src, then dest
-			tabIndex := strings.LastIndexByte(line, '\t')
-			if tabIndex < 1 {
-				return fmt.Errorf("misformatted line: %s", line)
+		seen[currentID] = true
+
+		// Load the parent commits for the one we are currently examining
+		numParents := current.commit.NumParents()
+		var parents []*object.Commit
+		for i := 0; i < numParents; i++ {
+			parent, err := current.commit.Parent(i)
+			if err != nil {
+				break
 			}
-			entryPath, err := state.cleanEntryPath(line[tabIndex+1:])
+			parents = append(parents, parent)
+		}
+
+		// Examine the current commit and set of interesting paths
+		numOfParentsWithPath := make([]int, len(current.paths))
+		pathChanged := make([]bool, len(current.paths))
+		parentHashes := make([]map[string]plumbing.Hash, len(parents))
+		for j, parent := range parents {
+			parentHashes[j], err = getFileHashes(parent, treePath, current.paths)
 			if err != nil {
-				return err
+				break
 			}
-			if _, ok := seenPaths[entryPath]; !ok {
-				if state.update(entryPath, commit) {
-					coldStreak = 0
+
+			for i, path := range current.paths {
+				if parentHashes[j][path] != plumbing.ZeroHash {
+					numOfParentsWithPath[i]++
+					if parentHashes[j][path] != current.hashes[path] {
+						pathChanged[i] = true
+					}
 				}
-				seenPaths[entryPath] = struct{}{}
 			}
-			continue
 		}
 
-		// a new commit
-		commit, err = parseCommitInfo(line)
-		if err != nil {
-			return err
+		var remainingPaths []string
+		for i, path := range current.paths {
+			switch numOfParentsWithPath[i] {
+			case 0:
+				// The path didn't exist in any parent, so it must have been created by
+				// this commit. The results could already contain some newer change from
+				// different path, so don't override that.
+				if result[path] == nil {
+					result[path] = current.commit
+				}
+			case 1:
+				// The file is present on exactly one parent, so check if it was changed
+				// and save the revision if it did.
+				if pathChanged[i] {
+					if result[path] == nil {
+						result[path] = current.commit
+					}
+				} else {
+					remainingPaths = append(remainingPaths, path)
+				}
+			default:
+				// The file is present on more than one of the parent paths, so this is
+				// a merge. We have to examine all the parent trees to find out where
+				// the change occurred. pathChanged[i] would tell us that the file was
+				// changed during the merge, but it wouldn't tell us the relevant commit
+				// that introduced it.
+				remainingPaths = append(remainingPaths, path)
+			}
 		}
-		coldStreak++
-	}
-	return scanner.Err()
-}
 
-// parseCommitInfo parse a commit from a line of `git log` output. Expects the
-// line to be formatted according to getCommitsInfoPretty.
-func parseCommitInfo(line string) (*Commit, error) {
-	if len(line) < 43 {
-		return nil, fmt.Errorf("invalid git output: %s", line)
-	}
-	ref, err := NewIDFromString(line[:40])
-	if err != nil {
-		return nil, err
-	}
-	spaceIndex := strings.IndexByte(line[41:], ' ')
-	if spaceIndex < 0 {
-		return nil, fmt.Errorf("invalid git output: %s", line)
-	}
-	unixSeconds, err := strconv.Atoi(line[41 : 41+spaceIndex])
-	if err != nil {
-		return nil, err
+		if len(remainingPaths) > 0 {
+			// Add the parent nodes along with remaining paths to the heap for further
+			// processing.
+			for j, parent := range parents {
+				if seen[parent.ID()] {
+					continue
+				}
+
+				// Combine remainingPath with paths available on the parent branch
+				// and make union of them
+				var remainingPathsForParent []string
+				for _, path := range remainingPaths {
+					if parentHashes[j][path] != plumbing.ZeroHash {
+						remainingPathsForParent = append(remainingPathsForParent, path)
+					}
+				}
+
+				heap.Push(&commitAndPaths{parent, remainingPathsForParent, parentHashes[j]})
+			}
+		}
 	}
-	message := line[spaceIndex+42:]
-	return &Commit{
-		ID:            ref,
-		CommitMessage: message,
-		Committer: &Signature{
-			When: time.Unix(int64(unixSeconds), 0),
-		},
-	}, nil
+
+	return result, nil
 }

modules/git/commit_info_test.go

 		assert.NoError(t, err)
 		entries, err := tree.ListEntries()
 		assert.NoError(t, err)
-		commitsInfo, err := entries.GetCommitsInfo(commit, testCase.Path, nil)
+		commitsInfo, _, err := entries.GetCommitsInfo(commit, testCase.Path, nil)
 		assert.NoError(t, err)
 		assert.Len(t, commitsInfo, len(testCase.ExpectedIDs))
 		for _, commitInfo := range commitsInfo {
 		b.ResetTimer()
 		b.Run(benchmark.name, func(b *testing.B) {
 			for i := 0; i < b.N; i++ {
-				_, err := entries.GetCommitsInfo(commit, "", nil)
+				_, _, err := entries.GetCommitsInfo(commit, "", nil)
 				if err != nil {
 					b.Fatal(err)
 				}

modules/git/error.go

 func (err ErrUnsupportedVersion) Error() string {
 	return fmt.Sprintf("Operation requires higher version [required: %s]", err.Required)
 }
+
+// ErrBranchNotExist represents a "BranchNotExist" kind of error.
+type ErrBranchNotExist struct {
+	Name string
+}
+
+// IsErrBranchNotExist checks if an error is a ErrBranchNotExist.
+func IsErrBranchNotExist(err error) bool {
+	_, ok := err.(ErrBranchNotExist)
+	return ok
+}
+
+func (err ErrBranchNotExist) Error() string {
+	return fmt.Sprintf("branch does not exist [name: %s]", err.Name)
+}

modules/git/parse.go

 	"bytes"
 	"fmt"
 	"strconv"
+
+	"gopkg.in/src-d/go-git.v4/plumbing"
+	"gopkg.in/src-d/go-git.v4/plumbing/filemode"
+	"gopkg.in/src-d/go-git.v4/plumbing/object"
 )
 
 // ParseTreeEntries parses the output of a `git ls-tree` command.
 	for pos := 0; pos < len(data); {
 		// expect line to be of the form "<mode> <type> <sha>\t<filename>"
 		entry := new(TreeEntry)
+		entry.gogitTreeEntry = &object.TreeEntry{}
 		entry.ptree = ptree
 		if pos+6 > len(data) {
 			return nil, fmt.Errorf("Invalid ls-tree output: %s", string(data))
 		}
 		switch string(data[pos : pos+6]) {
 		case "100644":
-			entry.mode = EntryModeBlob
-			entry.Type = ObjectBlob
+			entry.gogitTreeEntry.Mode = filemode.Regular
 			pos += 12 // skip over "100644 blob "
 		case "100755":
-			entry.mode = EntryModeExec
-			entry.Type = ObjectBlob
+			entry.gogitTreeEntry.Mode = filemode.Executable
 			pos += 12 // skip over "100755 blob "
 		case "120000":
-			entry.mode = EntryModeSymlink
-			entry.Type = ObjectBlob
+			entry.gogitTreeEntry.Mode = filemode.Symlink
 			pos += 12 // skip over "120000 blob "
 		case "160000":
-			entry.mode = EntryModeCommit
-			entry.Type = ObjectCommit
+			entry.gogitTreeEntry.Mode = filemode.Submodule
 			pos += 14 // skip over "160000 object "
 		case "040000":
-			entry.mode = EntryModeTree
-			entry.Type = ObjectTree
+			entry.gogitTreeEntry.Mode = filemode.Dir
 			pos += 12 // skip over "040000 tree "
 		default:
 			return nil, fmt.Errorf("unknown type: %v", string(data[pos:pos+6]))
 			return nil, fmt.Errorf("Invalid ls-tree output: %v", err)
 		}
 		entry.ID = id
+		entry.gogitTreeEntry.Hash = plumbing.Hash(id)
 		pos += 41 // skip over sha and trailing space
 
 		end := pos + 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, err = strconv.Unquote(string(data[pos:end]))
+			entry.gogitTreeEntry.Name, err = strconv.Unquote(string(data[pos:end]))
 			if err != nil {
 				return nil, fmt.Errorf("Invalid ls-tree output: %v", err)
 			}
 		} else {
-			entry.name = string(data[pos:end])
+			entry.gogitTreeEntry.Name = string(data[pos:end])
 		}
 
 		pos = end + 1

modules/git/parse_test.go

 	"testing"
 
 	"github.com/stretchr/testify/assert"
+	"gopkg.in/src-d/go-git.v4/plumbing/filemode"
+	"gopkg.in/src-d/go-git.v4/plumbing/object"
 )
 
 func TestParseTreeEntries(t *testing.T) {
 			Input: "100644 blob 61ab7345a1a3bbc590068ccae37b8515cfc5843c\texample/file2.txt\n",
 			Expected: []*TreeEntry{
 				{
-					mode: EntryModeBlob,
-					Type: ObjectBlob,
-					ID:   MustIDFromString("61ab7345a1a3bbc590068ccae37b8515cfc5843c"),
-					name: "example/file2.txt",
+					ID: MustIDFromString("61ab7345a1a3bbc590068ccae37b8515cfc5843c"),
+					gogitTreeEntry: &object.TreeEntry{
+						Hash: MustIDFromString("61ab7345a1a3bbc590068ccae37b8515cfc5843c"),
+						Name: "example/file2.txt",
+						Mode: filemode.Regular,
+					},
 				},
 			},
 		},
 				"040000 tree 1d01fb729fb0db5881daaa6030f9f2d3cd3d5ae8\texample\n",
 			Expected: []*TreeEntry{
 				{
-					ID:   MustIDFromString("61ab7345a1a3bbc590068ccae37b8515cfc5843c"),
-					Type: ObjectBlob,
-					mode: EntryModeSymlink,
-					name: "example/\n.txt",
+					ID: MustIDFromString("61ab7345a1a3bbc590068ccae37b8515cfc5843c"),
+					gogitTreeEntry: &object.TreeEntry{
+						Hash: MustIDFromString("61ab7345a1a3bbc590068ccae37b8515cfc5843c"),
+						Name: "example/\n.txt",
+						Mode: filemode.Symlink,
+					},
 				},
 				{
-					ID:   MustIDFromString("1d01fb729fb0db5881daaa6030f9f2d3cd3d5ae8"),
-					Type: ObjectTree,
-					mode: EntryModeTree,
-					name: "example",
+					ID: MustIDFromString("1d01fb729fb0db5881daaa6030f9f2d3cd3d5ae8"),
+					gogitTreeEntry: &object.TreeEntry{
+						Hash: MustIDFromString("1d01fb729fb0db5881daaa6030f9f2d3cd3d5ae8"),
+						Name: "example",
+						Mode: filemode.Dir,
+					},
 				},
 			},
 		},

modules/git/repo.go

 	"time"
 
 	"github.com/Unknwon/com"
+	"gopkg.in/src-d/go-billy.v4/osfs"
+	gogit "gopkg.in/src-d/go-git.v4"
+	"gopkg.in/src-d/go-git.v4/plumbing/cache"
+	"gopkg.in/src-d/go-git.v4/storage/filesystem"
 )
 
 // Repository represents a Git repository.
 type Repository struct {
 	Path string
 
-	commitCache *ObjectCache
-	tagCache    *ObjectCache
+	tagCache *ObjectCache
+
+	gogitRepo    *gogit.Repository
+	gogitStorage *filesystem.Storage
 }
 
 const prettyLogFormat = `--pretty=format:%H`
 		return nil, errors.New("no such file or directory")
 	}
 
+	fs := osfs.New(repoPath)
+	_, err = fs.Stat(".git")
+	if err == nil {
+		fs, err = fs.Chroot(".git")
+		if err != nil {
+			return nil, err
+		}
+	}
+	storage := filesystem.NewStorageWithOptions(fs, cache.NewObjectLRUDefault(), filesystem.Options{KeepDescriptors: true})
+	gogitRepo, err := gogit.Open(storage, fs)
+	if err != nil {
+		return nil, err
+	}
+
 	return &Repository{
-		Path:        repoPath,
-		commitCache: newObjectCache(),
-		tagCache:    newObjectCache(),
+		Path:         repoPath,
+		gogitRepo:    gogitRepo,
+		gogitStorage: storage,
+		tagCache:     newObjectCache(),
 	}, nil
 }
 

modules/git/repo_blob.go

 
 package git
 
+import (
+	"gopkg.in/src-d/go-git.v4/plumbing"
+)
+
 func (repo *Repository) getBlob(id SHA1) (*Blob, error) {
-	if _, err := NewCommand("cat-file", "-p", id.String()).RunInDir(repo.Path); err != nil {
+	encodedObj, err := repo.gogitRepo.Storer.EncodedObject(plumbing.AnyObject, plumbing.Hash(id))
+	if err != nil {
 		return nil, ErrNotExist{id.String(), ""}
 	}
 
 	return &Blob{
-		repo: repo,
-		TreeEntry: &TreeEntry{
-			ID: id,
-			ptree: &Tree{
-				repo: repo,
-			},
-		},
+		ID:              id,
+		gogitEncodedObj: encodedObj,
 	}, nil
 }
 

modules/git/repo_blob_test.go

 		blob, err := r.GetBlob(testCase.OID)
 		assert.NoError(t, err)
 
-		dataReader, err := blob.Data()
+		dataReader, err := blob.DataAsync()
 		assert.NoError(t, err)
+		defer dataReader.Close()
 
 		data, err := ioutil.ReadAll(dataReader)
 		assert.NoError(t, err)

modules/git/repo_branch.go

 	"fmt"
 	"strings"
 
-	"gopkg.in/src-d/go-git.v4"
 	"gopkg.in/src-d/go-git.v4/plumbing"
 )
 
 
 // IsBranchExist returns true if given branch exists in current repository.
 func (repo *Repository) IsBranchExist(name string) bool {
-	return IsBranchExist(repo.Path, name)
+	_, err := repo.gogitRepo.Reference(plumbing.ReferenceName(BranchPrefix+name), true)
+	if err != nil {
+		return false
+	}
+	return true
 }
 
 // Branch represents a Git branch.
 type Branch struct {
 	Name string
 	Path string
+
+	gitRepo *Repository
 }
 
 // GetHEADBranch returns corresponding branch of HEAD.
 	}
 
 	return &Branch{
-		Name: stdout[len(BranchPrefix):],
-		Path: stdout,
+		Name:    stdout[len(BranchPrefix):],
+		Path:    stdout,
+		gitRepo: repo,
 	}, nil
 }
 
 
 // GetBranches returns all branches of the repository.
 func (repo *Repository) GetBranches() ([]string, error) {
-	r, err := git.PlainOpen(repo.Path)
+	var branchNames []string
+
+	branches, err := repo.gogitRepo.Branches()
 	if err != nil {
 		return nil, err
 	}
 
-	branchIter, err := r.Branches()
+	branches.ForEach(func(branch *plumbing.Reference) error {
+		branchNames = append(branchNames, strings.TrimPrefix(branch.Name().String(), BranchPrefix))
+		return nil
+	})
+
+	// TODO: Sort?
+
+	return branchNames, nil
+}
+
+// GetBranch returns a branch by it's name
+func (repo *Repository) GetBranch(branch string) (*Branch, error) {
+	if !repo.IsBranchExist(branch) {
+		return nil, ErrBranchNotExist{branch}
+	}
+	return &Branch{
+		Path:    repo.Path,
+		Name:    branch,
+		gitRepo: repo,
+	}, nil
+}
+
+// GetBranchesByPath returns a branch by it's path
+func GetBranchesByPath(path string) ([]*Branch, error) {
+	gitRepo, err := OpenRepository(path)
 	if err != nil {
 		return nil, err
 	}
-	branches := make([]string, 0)
-	if err = branchIter.ForEach(func(branch *plumbing.Reference) error {
-		branches = append(branches, branch.Name().Short())
-		return nil
-	}); err != nil {
+
+	brs, err := gitRepo.GetBranches()
+	if err != nil {
 		return nil, err
 	}
 
+	branches := make([]*Branch, len(brs))
+	for i := range brs {
+		branches[i] = &Branch{
+			Path:    path,
+			Name:    brs[i],
+			gitRepo: gitRepo,
+		}
+	}
+
 	return branches, nil
 }
 
 	_, err := NewCommand("remote", "remove", name).RunInDir(repo.Path)
 	return err
 }
+
+// GetCommit returns the head commit of a branch
+func (branch *Branch) GetCommit() (*Commit, error) {
+	return branch.gitRepo.GetBranchCommit(branch.Name)
+}

modules/git/repo_commit.go

 // Copyright 2015 The Gogs Authors. All rights reserved.
+// Copyright 2019 The Gitea Authors. All rights reserved.
 // Use of this source code is governed by a MIT-style
 // license that can be found in the LICENSE file.
 
 import (
 	"bytes"
 	"container/list"
+	"fmt"
 	"strconv"
 	"strings"
 
 	"github.com/mcuadros/go-version"
+	"gopkg.in/src-d/go-git.v4/plumbing"
+	"gopkg.in/src-d/go-git.v4/plumbing/object"
 )
 
 // 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)
+	ref, err := repo.gogitRepo.Reference(plumbing.ReferenceName(name), true)
 	if err != nil {
-		if strings.Contains(err.Error(), "not a valid ref") {
-			return "", ErrNotExist{name, ""}
-		}
 		return "", err
 	}
-	return strings.Split(stdout, " ")[0], nil
+
+	return ref.Hash().String(), nil
 }
 
 // GetBranchCommitID returns last commit ID string of given branch.
 	return strings.TrimSpace(stdout), nil
 }
 
-// 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
-			case "gpgsig":
-				sig, err := newGPGSignatureFromCommitline(data, nextline+spacepos+1, false)
-				if err != nil {
-					return nil, err
-				}
-				commit.Signature = sig
-			}
-			nextline += eol + 1
-		case eol == 0:
-			cm := string(data[nextline+1:])
-
-			// Tag GPG signatures are stored below the commit message
-			sigindex := strings.Index(cm, "-----BEGIN PGP SIGNATURE-----")
-			if sigindex != -1 {
-				sig, err := newGPGSignatureFromCommitline(data, (nextline+1)+sigindex, true)
-				if err == nil && sig != nil {
-					// remove signature from commit message
-					if sigindex == 0 {
-						cm = ""
-					} else {
-						cm = cm[:sigindex-1]
-					}
-					commit.Signature = sig
-				}
-			}
+func convertPGPSignatureForTag(t *object.Tag) *CommitGPGSignature {
+	if t.PGPSignature == "" {
+		return nil
+	}
 
-			commit.CommitMessage = cm
-			break l
-		default:
-			break l
-		}
+	var w strings.Builder
+	var err error
+
+	if _, err = fmt.Fprintf(&w,
+		"object %s\ntype %s\ntag %s\ntagger ",
+		t.Target.String(), t.TargetType.Bytes(), t.Name); err != nil {
+		return nil
+	}
+
+	if err = t.Tagger.Encode(&w); err != nil {
+		return nil
+	}
+
+	if _, err = fmt.Fprintf(&w, "\n\n"); err != nil {
+		return nil
+	}
+
+	if _, err = fmt.Fprintf(&w, t.Message); err != nil {
+		return nil
+	}
+
+	return &CommitGPGSignature{
+		Signature: t.PGPSignature,
+		Payload:   strings.TrimSpace(w.String()) + "\n",
 	}
-	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
-	}
+	var tagObject *object.Tag
 
-	data, err := NewCommand("cat-file", "-p", id.String()).RunInDirBytes(repo.Path)
-	if err != nil {
-		if strings.Contains(err.Error(), "fatal: Not a valid object name") {
-			return nil, ErrNotExist{id.String(), ""}
+	gogitCommit, err := repo.gogitRepo.CommitObject(plumbing.Hash(id))
+	if err == plumbing.ErrObjectNotFound {
+		tagObject, err = repo.gogitRepo.TagObject(plumbing.Hash(id))
+		if err == nil {
+			gogitCommit, err = repo.gogitRepo.CommitObject(tagObject.Target)
 		}
-		return nil, err
 	}
-
-	commit, err := parseCommitData(data)
 	if err != nil {
 		return nil, err
 	}
+
+	commit := convertCommit(gogitCommit)
 	commit.repo = repo
-	commit.ID = id
 
-	data, err = NewCommand("name-rev", id.String()).RunInDirBytes(repo.Path)
+	if tagObject != nil {
+		commit.CommitMessage = strings.TrimSpace(tagObject.Message)
+		commit.Author = &tagObject.Tagger
+		commit.Signature = convertPGPSignatureForTag(tagObject)
+	}
+
+	tree, err := gogitCommit.Tree()
 	if err != nil {
 		return nil, err
 	}
 
-	// name-rev commitID output will be "COMMIT_ID master" or "COMMIT_ID master~12"
-	commit.Branch = strings.Split(strings.Split(string(data), " ")[1], "~")[0]
+	commit.Tree.ID = tree.Hash
+	commit.Tree.gogitTree = tree
 
-	repo.commitCache.Set(id.String(), commit)
 	return commit, nil
 }
 

modules/git/repo_tag.go

 // Copyright 2015 The Gogs Authors. All rights reserved.
+// Copyright 2019 The Gitea Authors. All rights reserved.
 // Use of this source code is governed by a MIT-style
 // license that can be found in the LICENSE file.
 
 	"strings"
 
 	"github.com/mcuadros/go-version"
+	"gopkg.in/src-d/go-git.v4/plumbing"
 )
 
 // TagPrefix tags prefix path on the repository
 
 // IsTagExist returns true if given tag exists in the repository.
 func (repo *Repository) IsTagExist(name string) bool {
-	return IsTagExist(repo.Path, name)
+	_, err := repo.gogitRepo.Reference(plumbing.ReferenceName(TagPrefix+name), true)
+	if err != nil {
+		return false
+	}
+	return true
 }
 
 // CreateTag create one tag in the repository
 
 // 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")
-	}
+	var tagNames []string
 
-	stdout, err := cmd.RunInDir(repo.Path)
+	tags, err := repo.gogitRepo.Tags()
 	if err != nil {
 		return nil, err
 	}
 
-	tags := strings.Split(stdout, "\n")
-	tags = tags[:len(tags)-1]
+	tags.ForEach(func(tag *plumbing.Reference) error {
+		tagNames = append(tagNames, strings.TrimPrefix(tag.Name().String(), TagPrefix))
+		return nil
+	})
 
-	if version.Compare(gitVersion, "2.0.0", "<") {
-		version.Sort(tags)
+	version.Sort(tagNames)
 
-		// Reverse order
-		for i := 0; i < len(tags)/2; i++ {
-			j := len(tags) - i - 1
-			tags[i], tags[j] = tags[j], tags[i]
-		}
+	// Reverse order
+	for i := 0; i < len(tagNames)/2; i++ {
+		j := len(tagNames) - i - 1
+		tagNames[i], tagNames[j] = tagNames[j], tagNames[i]
 	}
 
-	return tags, nil
+	return tagNames, nil
 }

modules/git/repo_tree.go

 // Copyright 2015 The Gogs Authors. All rights reserved.
+// Copyright 2019 The Gitea 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 (
+	"gopkg.in/src-d/go-git.v4/plumbing"
+)
+
 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(), ""}
-		}
+	gogitTree, err := repo.gogitRepo.TreeObject(plumbing.Hash(id))
+	if err != nil {
+		return nil, err
 	}
 
-	return NewTree(repo, id), nil
+	tree := NewTree(repo, id)
+	tree.gogitTree = gogitTree
+	return tree, nil
 }
 
 // GetTree find the tree object in the repository.
 	if err != nil {
 		return nil, err
 	}
-	return repo.getTree(id)
+	commitObject, err := repo.gogitRepo.CommitObject(plumbing.Hash(id))
+	if err != nil {
+		return nil, err
+	}
+	treeObject, err := repo.getTree(SHA1(commitObject.TreeHash))
+	if err != nil {
+		return nil, err
+	}
+	treeObject.CommitID = id
+	return treeObject, nil
 }

modules/git/sha1.go

 // Copyright 2015 The Gogs Authors. All rights reserved.
+// Copyright 2019 The Gitea 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"
 	"encoding/hex"
 	"fmt"
 	"strings"
+
+	"gopkg.in/src-d/go-git.v4/plumbing"
 )
 
 // EmptySHA defines empty git SHA
 const EmptySHA = "0000000000000000000000000000000000000000"
 
 // SHA1 a git commit name
-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:
-		return bytes.Equal(v, id[:])
-	case SHA1:
-		return v == id
-	default:
-		return false
-	}
-}
-
-// String returns string (hex) representation of the Oid.
-func (id SHA1) String() string {
-	return hex.EncodeToString(id[:])
-}
+type SHA1 = plumbing.Hash
 
 // MustID always creates a new SHA1 from a [20]byte array with no validation of input.
 func MustID(b []byte) SHA1 {

modules/git/signature.go

 // Copyright 2015 The Gogs Authors. All rights reserved.
+// Copyright 2019 The Gitea Authors. All rights reserved.
 // Use of this source code is governed by a MIT-style
 // license that can be found in the LICENSE file.
 
 	"bytes"
 	"strconv"
 	"time"
+
+	"gopkg.in/src-d/go-git.v4/plumbing/object"
 )
 
 // Signature represents the Author or Committer information.
-type Signature struct {
-	Email string
-	Name  string
-	When  time.Time
-}
+type Signature = object.Signature
 
 const (
 	// GitTimeLayout is the (default) time layout used by git.

modules/git/tree.go

 // Copyright 2015 The Gogs Authors. All rights reserved.
+// Copyright 2019 The Gitea 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 (
+	"io"
 	"strings"
+
+	"gopkg.in/src-d/go-git.v4/plumbing"
+	"gopkg.in/src-d/go-git.v4/plumbing/object"
 )
 
 // Tree represents a flat directory listing.
 type Tree struct {
-	ID   SHA1
-	repo *Repository
+	ID       SHA1
+	CommitID SHA1
+	repo     *Repository
+
+	gogitTree *object.Tree
 
 	// parent tree
 	ptree *Tree
-
-	entries       Entries
-	entriesParsed bool
-
-	entriesRecursive       Entries
-	entriesRecursiveParsed bool
 }
 
-// NewTree create a new tree according the repository and commit id
+// NewTree create a new tree according the repository and tree id
 func NewTree(repo *Repository, id SHA1) *Tree {
 	return &Tree{
 		ID:   id,
 	return g, nil
 }
 
-// ListEntries returns all entries of current tree.
-func (t *Tree) ListEntries() (Entries, error) {
-	if t.entriesParsed {
-		return t.entries, nil
+func (t *Tree) loadTreeObject() error {
+	gogitTree, err := t.repo.gogitRepo.TreeObject(plumbing.Hash(t.ID))
+	if err != nil {
+		return err
 	}
 
-	stdout, err := NewCommand("ls-tree", t.ID.String()).RunInDirBytes(t.repo.Path)
-	if err != nil {
-		return nil, err
+	t.gogitTree = gogitTree
+	return nil
+}
+
+// ListEntries returns all entries of current tree.
+func (t *Tree) ListEntries() (Entries, error) {
+	if t.gogitTree == nil {
+		err := t.loadTreeObject()
+		if err != nil {
+			return nil, err
+		}
 	}
 
-	t.entries, err = parseTreeEntries(stdout, t)
-	if err == nil {
-		t.entriesParsed = true
+	entries := make([]*TreeEntry, len(t.gogitTree.Entries))
+	for i, entry := range t.gogitTree.Entries {
+		entries[i] = &TreeEntry{
+			ID:             entry.Hash,
+			gogitTreeEntry: &t.gogitTree.Entries[i],
+			ptree:          t,
+		}
 	}
 
-	return t.entries, err
+	return entries, nil
 }
 
 // ListEntriesRecursive returns all entries of current tree recursively including all subtrees
 func (t *Tree) ListEntriesRecursive() (Entries, error) {
-	if t.entriesRecursiveParsed {
-		return t.entriesRecursive, nil
-	}
-	stdout, err := NewCommand("ls-tree", "-t", "-r", t.ID.String()).RunInDirBytes(t.repo.Path)
-	if err != nil {
-		return nil, err
+	if t.gogitTree == nil {
+		err := t.loadTreeObject()
+		if err != nil {
+			return nil, err
+		}
 	}
 
-	t.entriesRecursive, err = parseTreeEntries(stdout, t)
-	if err == nil {
-		t.entriesRecursiveParsed = true
+	var entries []*TreeEntry
+	seen := map[plumbing.Hash]bool{}
+	walker := object.NewTreeWalker(t.gogitTree, true, seen)
+	for {
+		_, entry, err := walker.Next()
+		if err == io.EOF {
+			break
+		}
+		if err != nil {
+			return nil, err
+		}
+		if seen[entry.Hash] {
+			continue
+		}
+
+		convertedEntry := &TreeEntry{
+			ID:             entry.Hash,
+			gogitTreeEntry: &entry,
+			ptree:          t,
+		}
+		entries = append(entries, convertedEntry)
 	}
 
-	return t.entriesRecursive, err
+	return entries, nil
 }

modules/git/tree_blob.go

 // Copyright 2015 The Gogs Authors. All rights reserved.
+// Copyright 2019 The Gitea Authors. All rights reserved.
 // Use of this source code is governed by a MIT-style
 // license that can be found in the LICENSE file.
 
 import (
 	"path"
 	"strings"
+
+	"gopkg.in/src-d/go-git.v4/plumbing"
+	"gopkg.in/src-d/go-git.v4/plumbing/filemode"
+	"gopkg.in/src-d/go-git.v4/plumbing/object"
 )
 
 // GetTreeEntryByPath get the tree entries according the sub dir
 func (t *Tree) GetTreeEntryByPath(relpath string) (*TreeEntry, error) {
 	if len(relpath) == 0 {
 		return &TreeEntry{
-			ID:   t.ID,
-			Type: ObjectTree,
-			mode: EntryModeTree,
+			ID: t.ID,
+			//Type: ObjectTree,
+			gogitTreeEntry: &object.TreeEntry{
+				Name: "",
+				Mode: filemode.Dir,
+				Hash: plumbing.Hash(t.ID),
+			},
 		}, nil
 	}
 
 				return nil, err
 			}
 			for _, v := range entries {
-				if v.name == name {
+				if v.Name() == name {
 					return v, nil
 				}
 			}

modules/git/tree_entry.go

 // Copyright 2015 The Gogs Authors. All rights reserved.
+// Copyright 2019 The Gitea Authors. All rights reserved.
 // Use of this source code is governed by a MIT-style
 // license that can be found in the LICENSE file.
 
 import (
 	"io"
 	"sort"
-	"strconv"
 	"strings"
+
+	"gopkg.in/src-d/go-git.v4/plumbing"
+	"gopkg.in/src-d/go-git.v4/plumbing/filemode"
+	"gopkg.in/src-d/go-git.v4/plumbing/object"
 )
 
 // EntryMode the type of the object in the git tree
 // one of these.
 const (
 	// EntryModeBlob
-	EntryModeBlob EntryMode = 0x0100644
+	EntryModeBlob EntryMode = 0100644
 	// EntryModeExec
-	EntryModeExec EntryMode = 0x0100755
+	EntryModeExec EntryMode = 0100755
 	// EntryModeSymlink
-	EntryModeSymlink EntryMode = 0x0120000
+	EntryModeSymlink EntryMode = 0120000
 	// EntryModeCommit
-	EntryModeCommit EntryMode = 0x0160000
+	EntryModeCommit EntryMode = 0160000
 	// EntryModeTree
-	EntryModeTree EntryMode = 0x0040000
+	EntryModeTree EntryMode = 0040000
 )
 
 // TreeEntry the leaf in the git tree
 type TreeEntry struct {
-	ID   SHA1
-	Type ObjectType
-
-	mode EntryMode
-	name string
-
-	ptree *Tree
+	ID SHA1
 
-	committed bool
+	gogitTreeEntry *object.TreeEntry
+	ptree          *Tree
 
 	size  int64
 	sized bool
 
 // Name returns the name of the entry
 func (te *TreeEntry) Name() string {
-	return te.name
+	return te.gogitTreeEntry.Name
 }
 
 // Mode returns the mode of the entry
 func (te *TreeEntry) Mode() EntryMode {
-	return te.mode
+	return EntryMode(te.gogitTreeEntry.Mode)
+}
+
+// Type returns the type of the entry (commit, tree, blob)
+func (te *TreeEntry) Type() string {
+	switch te.Mode() {
+	case EntryModeCommit:
+		return "commit"
+	case EntryModeTree:
+		return "tree"
+	default:
+		return "blob"
+	}
 }
 
 // Size returns the size of the entry
 		return te.size
 	}
 
-	stdout, err := NewCommand("cat-file", "-s", te.ID.String()).RunInDir(te.ptree.repo.Path)
+	file, err := te.ptree.gogitTree.TreeEntryFile(te.gogitTreeEntry)
 	if err != nil {
 		return 0
 	}
 
 	te.sized = true
-	te.size, _ = strconv.ParseInt(strings.TrimSpace(stdout), 10, 64)
+	te.size = file.Size
 	return te.size
 }
 
 // IsSubModule if the entry is a sub module
 func (te *TreeEntry) IsSubModule() bool {
-	return te.mode == EntryModeCommit
+	return te.gogitTreeEntry.Mode == filemode.Submodule
 }
 
 // IsDir if the entry is a sub dir
 func (te *TreeEntry) IsDir() bool {
-	return te.mode == EntryModeTree
+	return te.gogitTreeEntry.Mode == filemode.Dir
 }
 
 // IsLink if the entry is a symlink
 func (te *TreeEntry) IsLink() bool {
-	return te.mode == EntryModeSymlink
+	return te.gogitTreeEntry.Mode == filemode.Symlink
 }
 
-// Blob retrun the blob object the entry
+// IsRegular if the entry is a regular file
+func (te *TreeEntry) IsRegular() bool {
+	return te.gogitTreeEntry.Mode == filemode.Regular
+}
+
+// Blob returns the blob object the entry
 func (te *TreeEntry) Blob() *Blob {
+	encodedObj, err := te.ptree.repo.gogitRepo.Storer.EncodedObject(plumbing.AnyObject, te.gogitTreeEntry.Hash)
+	if err != nil {
+		return nil
+	}
+
 	return &Blob{
-		repo:      te.ptree.repo,
-		TreeEntry: te,
+		ID:              te.gogitTreeEntry.Hash,
+		gogitEncodedObj: encodedObj,
+		name:            te.Name(),
 	}
 }
 
 	}
 
 	// read the link
-	r, err := te.Blob().Data()
+	r, err := te.Blob().DataAsync()
 	if err != nil {
 		return nil, err
 	}
+	defer r.Close()
 	buf := make([]byte, te.Size())
 	_, err = io.ReadFull(r, buf)
 	if err != nil {
 	if te.IsSubModule() || !te.IsDir() {
 		return ""
 	}
-	tree, err := te.ptree.SubTree(te.name)
+	tree, err := te.ptree.SubTree(te.Name())
 	if err != nil {
-		return te.name
+		return te.Name()
 	}
 	entries, _ := tree.ListEntries()
 	if len(entries) == 1 && entries[0].IsDir() {
 		name := entries[0].GetSubJumpablePathName()
 		if name != "" {
-			return te.name + "/" + name
+			return te.Name() + "/" + name
 		}
 	}
-	return te.name
+	return te.Name()
 }
 
 // Entries a list of entry
 		return (t1.IsDir() || t1.IsSubModule()) && !t2.IsDir() && !t2.IsSubModule()
 	},
 	func(t1, t2 *TreeEntry, cmp func(s1, s2 string) bool) bool {
-		return cmp(t1.name, t2.name)
+		return cmp(t1.Name(), t2.Name())
 	},
 }
 

modules/git/tree_entry_test.go

 	"testing"
 
 	"github.com/stretchr/testify/assert"
+	"gopkg.in/src-d/go-git.v4/plumbing/filemode"
+	"gopkg.in/src-d/go-git.v4/plumbing/object"
 )
 
 func getTestEntries() Entries {
 	return Entries{
-		&TreeEntry{name: "v1.0", mode: EntryModeTree},
-		&TreeEntry{name: "v2.0", mode: EntryModeTree},
-		&TreeEntry{name: "v2.1", mode: EntryModeTree},
-		&TreeEntry{name: "v2.12", mode: EntryModeTree},
-		&TreeEntry{name: "v2.2", mode: EntryModeTree},
-		&TreeEntry{name: "v12.0", mode: EntryModeTree},
-		&TreeEntry{name: "abc", mode: EntryModeBlob},
-		&TreeEntry{name: "bcd", mode: EntryModeBlob},
+		&TreeEntry{gogitTreeEntry: &object.TreeEntry{Name: "v1.0", Mode: filemode.Dir}},
+		&TreeEntry{gogitTreeEntry: &object.TreeEntry{Name: "v2.0", Mode: filemode.Dir}},
+		&TreeEntry{gogitTreeEntry: &object.TreeEntry{Name: "v2.1", Mode: filemode.Dir}},
+		&TreeEntry{gogitTreeEntry: &object.TreeEntry{Name: "v2.12", Mode: filemode.Dir}},
+		&TreeEntry{gogitTreeEntry: &object.TreeEntry{Name: "v2.2", Mode: filemode.Dir}},
+		&TreeEntry{gogitTreeEntry: &object.TreeEntry{Name: "v12.0", Mode: filemode.Dir}},
+		&TreeEntry{gogitTreeEntry: &object.TreeEntry{Name: "abc", Mode: filemode.Regular}},
+		&TreeEntry{gogitTreeEntry: &object.TreeEntry{Name: "bcd", Mode: filemode.Regular}},
 	}
 }
 

modules/repofiles/blob_test.go

 
 	gbr, err := GetBlobBySHA(ctx.Repo.Repository, ctx.Params(":sha"))
 	expectedGBR := &api.GitBlobResponse{
-		Content:  "Y29tbWl0IDY1ZjFiZjI3YmMzYmY3MGY2NDY1NzY1ODYzNWU2NjA5NGVkYmNiNGQKQXV0aG9yOiB1c2VyMSA8YWRkcmVzczFAZXhhbXBsZS5jb20+CkRhdGU6ICAgU3VuIE1hciAxOSAxNjo0Nzo1OSAyMDE3IC0wNDAwCgogICAgSW5pdGlhbCBjb21taXQKCmRpZmYgLS1naXQgYS9SRUFETUUubWQgYi9SRUFETUUubWQKbmV3IGZpbGUgbW9kZSAxMDA2NDQKaW5kZXggMDAwMDAwMC4uNGI0ODUxYQotLS0gL2Rldi9udWxsCisrKyBiL1JFQURNRS5tZApAQCAtMCwwICsxLDMgQEAKKyMgcmVwbzEKKworRGVzY3JpcHRpb24gZm9yIHJlcG8xClwgTm8gbmV3bGluZSBhdCBlbmQgb2YgZmlsZQo=",
+		Content:  "dHJlZSAyYTJmMWQ0NjcwNzI4YTJlMTAwNDllMzQ1YmQ3YTI3NjQ2OGJlYWI2CmF1dGhvciB1c2VyMSA8YWRkcmVzczFAZXhhbXBsZS5jb20+IDE0ODk5NTY0NzkgLTA0MDAKY29tbWl0dGVyIEV0aGFuIEtvZW5pZyA8ZXRoYW50a29lbmlnQGdtYWlsLmNvbT4gMTQ4OTk1NjQ3OSAtMDQwMAoKSW5pdGlhbCBjb21taXQK",
 		Encoding: "base64",
 		URL:      "https://try.gitea.io/api/v1/repos/user2/repo1/git/blobs/65f1bf27bc3bf70f64657658635e66094edbcb4d",
 		SHA:      "65f1bf27bc3bf70f64657658635e66094edbcb4d",

modules/repofiles/content.go

 		HTMLURL:     htmlURL.String(),
 		GitURL:      gitURL.String(),
 		DownloadURL: downloadURL.String(),
-		Type:        string(entry.Type),
+		Type:        entry.Type(),
 		Links: &api.FileLinksResponse{
 			Self:    selfURL.String(),
 			GitURL:  gitURL.String(),

modules/repofiles/temp_repo.go

 		fmt.Sprintf("Clone (git clone -s --bare): %s", t.basePath),
 		"git", "clone", "-s", "--bare", "-b", branch, t.repo.RepoPath(), t.basePath); err != nil {
 		if matched, _ := regexp.MatchString(".*Remote branch .* not found in upstream origin.*", stderr); matched {
-			return models.ErrBranchNotExist{
+			return git.ErrBranchNotExist{
 				Name: branch,
 			}
 		} else if matched, _ := regexp.MatchString(".* repository .* does not exist.*", stderr); matched {

modules/repofiles/tree.go

 		}
 	}
 	tree := new(api.GitTreeResponse)
-	tree.SHA = gitTree.ID.String()
+	tree.SHA = gitTree.CommitID.String()
 	tree.URL = repo.APIURL() + "/git/trees/" + tree.SHA
 	var entries git.Entries
 	if recursive {
 	tree.Entries = make([]api.GitEntry, rangeEnd-rangeStart)
 	for e := rangeStart; e < rangeEnd; e++ {
 		i := e - rangeStart
-		tree.Entries[i].Path = entries[e].Name()
-		tree.Entries[i].Mode = fmt.Sprintf("%06x", entries[e].Mode())
-		tree.Entries[i].Type = string(entries[e].Type)
-		tree.Entries[i].Size = entries[e].Size()
-		tree.Entries[i].SHA = entries[e].ID.String()
+
+		tree.Entries[e].Path = entries[e].Name()
+		tree.Entries[e].Mode = fmt.Sprintf("%06o", entries[e].Mode())
+		tree.Entries[e].Type = entries[e].Type()
+		tree.Entries[e].Size = entries[e].Size()
+		tree.Entries[e].SHA = entries[e].ID.String()
 
 		if entries[e].IsDir() {
 			copy(treeURL[copyPos:], entries[e].ID.String())

modules/repofiles/tree_test.go

 		Page:       1,
 		TotalCount: 1,
 	}
-	assert.EqualValues(t, tree, expectedTree)
+
+	assert.EqualValues(t, expectedTree, tree)
 }

modules/repofiles/update.go

 				BranchName: opts.NewBranch,
 			}
 		}
-		if err != nil && !models.IsErrBranchNotExist(err) {
+		if err != nil && !git.IsErrBranchNotExist(err) {
 			return nil, err
 		}
 	} else {

routers/api/v1/convert/convert.go

 }
 
 // ToBranch convert a commit and branch to an api.Branch
-func ToBranch(repo *models.Repository, b *models.Branch, c *git.Commit) *api.Branch {
+func ToBranch(repo *models.Repository, b *git.Branch, c *git.Commit) *api.Branch {
 	return &api.Branch{
 		Name:   b.Name,
 		Commit: ToCommit(repo, c),

routers/api/v1/repo/branch.go

 // Copyright 2016 The Gogs Authors. All rights reserved.
+// Copyright 2019 The Gitea 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 repo
 
 import (
-	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/modules/context"
+	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/routers/api/v1/convert"
 
 	api "code.gitea.io/sdk/gitea"
 	}
 	branch, err := ctx.Repo.Repository.GetBranch(ctx.Repo.BranchName)
 	if err != nil {
-		if models.IsErrBranchNotExist(err) {
+		if git.IsErrBranchNotExist(err) {
 			ctx.NotFound(err)
 		} else {
 			ctx.Error(500, "GetBranch", err)

routers/repo/commit.go

 		ctx.Data["BeforeSourcePath"] = setting.AppSubURL + "/" + path.Join(userName, repoName, "src", "commit", parents[0])
 	}
 	ctx.Data["RawPath"] = setting.AppSubURL + "/" + path.Join(userName, repoName, "raw", "commit", commitID)
+	ctx.Data["BranchName"], err = commit.GetBranchName()
 	ctx.HTML(200, tplDiff)
 }
 

routers/repo/editor.go

 			return
 		}
 
-		dataRc, err := blob.Data()
+		dataRc, err := blob.DataAsync()
 		if err != nil {
 			ctx.NotFound("blob.Data", err)
 			return
 		}
+		defer dataRc.Close()
 
 		ctx.Data["FileSize"] = blob.Size()
 		ctx.Data["FileName"] = blob.Name()
 		} else if models.IsErrRepoFileAlreadyExists(err) {
 			ctx.Data["Err_TreePath"] = true
 			ctx.RenderWithErr(ctx.Tr("repo.editor.file_already_exists", form.TreePath), tplEditFile, &form)
-		} else if models.IsErrBranchNotExist(err) {
+		} else if git.IsErrBranchNotExist(err) {
 			// For when a user adds/updates a file to a branch that no longer exists
-			if branchErr, ok := err.(models.ErrBranchNotExist); ok {
+			if branchErr, ok := err.(git.ErrBranchNotExist); ok {
 				ctx.RenderWithErr(ctx.Tr("repo.editor.branch_does_not_exist", branchErr.Name), tplEditFile, &form)
 			} else {
 				ctx.Error(500, err.Error())
 			} else {
 				ctx.ServerError("DeleteRepoFile", err)
 			}
-		} else if models.IsErrBranchNotExist(err) {
+		} else if git.IsErrBranchNotExist(err) {
 			// For when a user deletes a file to a branch that no longer exists
-			if branchErr, ok := err.(models.ErrBranchNotExist); ok {
+			if branchErr, ok := err.(git.ErrBranchNotExist); ok {
 				ctx.RenderWithErr(ctx.Tr("repo.editor.branch_does_not_exist", branchErr.Name), tplEditFile, &form)
 			} else {
 				ctx.Error(500, err.Error())

routers/repo/issue.go

 	"bytes"
 	"errors"
 	"fmt"
-	"io"
 	"io/ioutil"
 	"net/http"
 	"strconv"
 }
 
 func getFileContentFromDefaultBranch(ctx *context.Context, filename string) (string, bool) {
-	var r io.Reader
 	var bytes []byte
 
 	if ctx.Repo.Commit == nil {
 	if entry.Blob().Size() >= setting.UI.MaxDisplayFileSize {
 		return "", false
 	}
-	r, err = entry.Blob().Data()
+	r, err := entry.Blob().DataAsync()
 	if err != nil {
 		return "", false
 	}
+	defer r.Close()
 	bytes, err = ioutil.ReadAll(r)
 	if err != nil {
 		return "", false

routers/repo/setting_protected_branch.go

 
 	protectBranch, err := models.GetProtectedBranchBy(c.Repo.Repository.ID, branch)
 	if err != nil {
-		if !models.IsErrBranchNotExist(err) {
+		if !git.IsErrBranchNotExist(err) {
 			c.ServerError("GetProtectBranchOfRepoByName", err)
 			return
 		}
 
 	protectBranch, err := models.GetProtectedBranchBy(ctx.Repo.Repository.ID, branch)
 	if err != nil {
-		if !models.IsErrBranchNotExist(err) {
+		if !git.IsErrBranchNotExist(err) {
 			ctx.ServerError("GetProtectBranchOfRepoByName", err)
 			return
 		}

routers/repo/view.go

 	}
 	entries.CustomSort(base.NaturalSortLess)
 
-	ctx.Data["Files"], err = entries.GetCommitsInfo(ctx.Repo.Commit, ctx.Repo.TreePath, nil)
+	var latestCommit *git.Commit
+	ctx.Data["Files"], latestCommit, err = entries.GetCommitsInfo(ctx.Repo.Commit, ctx.Repo.TreePath, nil)
 	if err != nil {
 		ctx.ServerError("GetCommitsInfo", err)
 		return
 
 	// Show latest commit info of repository in table header,
 	// or of directory if not in root directory.
-	latestCommit := ctx.Repo.Commit
-	if len(ctx.Repo.TreePath) > 0 {
-		latestCommit, err = ctx.Repo.Commit.GetCommitByPath(ctx.Repo.TreePath)
-		if err != nil {
-			ctx.ServerError("GetCommitByPath", err)
-			return
-		}
-	}
 	ctx.Data["LatestCommit"] = latestCommit
 	ctx.Data["LatestCommitVerification"] = models.ParseCommitWithSignature(latestCommit)
 	ctx.Data["LatestCommitUser"] = models.ValidateCommitWithEmail(latestCommit)

routers/repo/wiki.go

 		return nil, err
 	}
 	for _, entry := range entries {
-		if entry.Type == git.ObjectBlob && entry.Name() == target {
+		if entry.IsRegular() && entry.Name() == target {
 			return entry, nil
 		}
 	}
 // wikiContentsByEntry returns the contents of the wiki page referenced by the
 // given tree entry. Writes to ctx if an error occurs.
 func wikiContentsByEntry(ctx *context.Context, entry *git.TreeEntry) []byte {
-	reader, err := entry.Blob().Data()
+	reader, err := entry.Blob().DataAsync()
 	if err != nil {
 		ctx.ServerError("Blob.Data", err)
 		return nil
 	}
+	defer reader.Close()
 	content, err := ioutil.ReadAll(reader)
 	if err != nil {
 		ctx.ServerError("ReadAll", err)
 		}
 		pages := make([]PageMeta, 0, len(entries))
 		for _, entry := range entries {
-			if entry.Type != git.ObjectBlob {
+			if !entry.IsRegular() {
 				continue
 			}
 			wikiName, err := models.WikiFilenameToName(entry.Name())
 	}
 	pages := make([]PageMeta, 0, len(entries))
 	for _, entry := range entries {
-		if entry.Type != git.ObjectBlob {
+		if !entry.IsRegular() {
 			continue
 		}
 		c, err := wikiRepo.GetCommitByPath(entry.Name())

routers/repo/wiki_test.go

 	if !assert.NotNil(t, entry) {
 		return ""
 	}
-	reader, err := entry.Blob().Data()
+	reader, err := entry.Blob().DataAsync()
 	assert.NoError(t, err)
+	defer reader.Close()
 	bytes, err := ioutil.ReadAll(reader)
 	assert.NoError(t, err)
 	return string(bytes)

templates/repo/diff/page.tmpl

 				{{if IsMultilineCommitMessage .Commit.Message}}
 					<pre class="commit-body">{{RenderCommitBody .Commit.Message $.RepoLink $.Repository.ComposeMetas}}</pre>
 				{{end}}
-				<span class="text grey"><i class="octicon octicon-git-branch"></i>{{.Commit.Branch}}</span>
+				<span class="text grey"><i class="octicon octicon-git-branch"></i>{{.BranchName}}</span>
 			</div>
 			<div class="ui attached info segment {{if .Commit.Signature}} isSigned {{if .Verification.Verified }} isVerified {{end}}{{end}}">
 				<div class="ui stackable grid">

vendor/modules.txt

 # gopkg.in/redis.v2 v2.3.2
 gopkg.in/redis.v2
 # gopkg.in/src-d/go-billy.v4 v4.3.0
-gopkg.in/src-d/go-billy.v4
 gopkg.in/src-d/go-billy.v4/osfs
+gopkg.in/src-d/go-billy.v4
 gopkg.in/src-d/go-billy.v4/util
 gopkg.in/src-d/go-billy.v4/helper/chroot
 gopkg.in/src-d/go-billy.v4/helper/polyfill
 gopkg.in/src-d/go-git.v4
 gopkg.in/src-d/go-git.v4/config
 gopkg.in/src-d/go-git.v4/plumbing
-gopkg.in/src-d/go-git.v4/internal/revision
 gopkg.in/src-d/go-git.v4/plumbing/cache
 gopkg.in/src-d/go-git.v4/plumbing/filemode
+gopkg.in/src-d/go-git.v4/plumbing/object
+gopkg.in/src-d/go-git.v4/storage/filesystem
+gopkg.in/src-d/go-git.v4/internal/revision
 gopkg.in/src-d/go-git.v4/plumbing/format/gitignore
 gopkg.in/src-d/go-git.v4/plumbing/format/index
 gopkg.in/src-d/go-git.v4/plumbing/format/packfile
-gopkg.in/src-d/go-git.v4/plumbing/object
 gopkg.in/src-d/go-git.v4/plumbing/protocol/packp
 gopkg.in/src-d/go-git.v4/plumbing/protocol/packp/capability
 gopkg.in/src-d/go-git.v4/plumbing/protocol/packp/sideband
 gopkg.in/src-d/go-git.v4/plumbing/transport
 gopkg.in/src-d/go-git.v4/plumbing/transport/client
 gopkg.in/src-d/go-git.v4/storage
-gopkg.in/src-d/go-git.v4/storage/filesystem
 gopkg.in/src-d/go-git.v4/storage/memory
 gopkg.in/src-d/go-git.v4/utils/diff
 gopkg.in/src-d/go-git.v4/utils/ioutil
 gopkg.in/src-d/go-git.v4/utils/merkletrie/noder
 gopkg.in/src-d/go-git.v4/internal/url
 gopkg.in/src-d/go-git.v4/plumbing/format/config
+gopkg.in/src-d/go-git.v4/plumbing/format/diff
 gopkg.in/src-d/go-git.v4/utils/binary
 gopkg.in/src-d/go-git.v4/plumbing/format/idxfile
-gopkg.in/src-d/go-git.v4/plumbing/format/diff
+gopkg.in/src-d/go-git.v4/plumbing/format/objfile
+gopkg.in/src-d/go-git.v4/storage/filesystem/dotgit
 gopkg.in/src-d/go-git.v4/plumbing/format/pktline
 gopkg.in/src-d/go-git.v4/plumbing/transport/file
 gopkg.in/src-d/go-git.v4/plumbing/transport/git
 gopkg.in/src-d/go-git.v4/plumbing/transport/http
 gopkg.in/src-d/go-git.v4/plumbing/transport/ssh
-gopkg.in/src-d/go-git.v4/plumbing/format/objfile
-gopkg.in/src-d/go-git.v4/storage/filesystem/dotgit
 gopkg.in/src-d/go-git.v4/utils/merkletrie/internal/frame
 gopkg.in/src-d/go-git.v4/plumbing/transport/internal/common
 gopkg.in/src-d/go-git.v4/plumbing/transport/server