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repo_commit.go
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repo_commit.go
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// Copyright 2014 The Gogs Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package git
import (
"bytes"
"container/list"
"errors"
"strings"
"sync"
"github.com/Unknwon/com"
)
func (repo *Repository) getCommitIdOfRef(refpath string) (string, error) {
stdout, stderr, err := com.ExecCmdDir(repo.Path, "git", "show-ref", "--verify", refpath)
if err != nil {
return "", errors.New(stderr)
}
return strings.Split(stdout, " ")[0], nil
}
func (repo *Repository) GetCommitIdOfBranch(branchName string) (string, error) {
return repo.getCommitIdOfRef("refs/heads/" + branchName)
}
// get branch's last commit or a special commit by id string
func (repo *Repository) GetCommitOfBranch(branchName string) (*Commit, error) {
commitId, err := repo.GetCommitIdOfBranch(branchName)
if err != nil {
return nil, err
}
return repo.GetCommit(commitId)
}
func (repo *Repository) GetCommitIdOfTag(tagName string) (string, error) {
return repo.getCommitIdOfRef("refs/tags/" + tagName)
}
func (repo *Repository) GetCommitOfTag(tagName string) (*Commit, error) {
commitId, err := repo.GetCommitIdOfTag(tagName)
if err != nil {
return nil, err
}
return repo.GetCommit(commitId)
}
// Parse 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":
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":
sig, err := newSignatureFromCommitline(line[spacepos+1:])
if err != nil {
return nil, err
}
commit.Author = sig
case "committer":
sig, err := newSignatureFromCommitline(line[spacepos+1:])
if err != nil {
return nil, err
}
commit.Committer = sig
}
nextline += eol + 1
case eol == 0:
commit.CommitMessage = string(data[nextline+1:])
break l
default:
break l
}
}
return commit, nil
}
func (repo *Repository) getCommit(id sha1) (*Commit, error) {
if repo.commitCache != nil {
if c, ok := repo.commitCache[id]; ok {
return c, nil
}
} else {
repo.commitCache = make(map[sha1]*Commit, 10)
}
data, bytErr, err := com.ExecCmdDirBytes(repo.Path, "git", "cat-file", "-p", id.String())
if err != nil {
return nil, errors.New(err.Error() + ": " + string(bytErr))
}
commit, err := parseCommitData(data)
if err != nil {
return nil, err
}
commit.repo = repo
commit.Id = id
repo.commitCache[id] = commit
return commit, nil
}
// Find the commit object in the repository.
func (repo *Repository) GetCommit(commitId string) (*Commit, error) {
id, err := NewIdFromString(commitId)
if err != nil {
return nil, err
}
return repo.getCommit(id)
}
func (repo *Repository) commitsCount(id sha1) (int, error) {
if gitVer.LessThan(MustParseVersion("1.8.0")) {
stdout, stderr, err := com.ExecCmdDirBytes(repo.Path, "git", "log", "--pretty=format:''", id.String())
if err != nil {
return 0, errors.New(string(stderr))
}
return len(bytes.Split(stdout, []byte("\n"))), nil
}
stdout, stderr, err := com.ExecCmdDir(repo.Path, "git", "rev-list", "--count", id.String())
if err != nil {
return 0, errors.New(stderr)
}
return com.StrTo(strings.TrimSpace(stdout)).Int()
}
// used only for single tree, (]
func (repo *Repository) CommitsBetween(last *Commit, before *Commit) (*list.List, error) {
l := list.New()
if last == nil || last.ParentCount() == 0 {
return l, nil
}
var err error
cur := last
for {
if cur.Id.Equal(before.Id) {
break
}
l.PushBack(cur)
if cur.ParentCount() == 0 {
break
}
cur, err = cur.Parent(0)
if err != nil {
return nil, err
}
}
return l, nil
}
func (repo *Repository) commitsBefore(lock *sync.Mutex, l *list.List, parent *list.Element, id sha1, limit int) error {
commit, err := repo.getCommit(id)
if err != nil {
return err
}
var e *list.Element
if parent == nil {
e = l.PushBack(commit)
} else {
var in = parent
for {
if in == nil {
break
} else if in.Value.(*Commit).Id.Equal(commit.Id) {
return nil
} else {
if in.Next() == nil {
break
}
if in.Value.(*Commit).Committer.When.Equal(commit.Committer.When) {
break
}
if in.Value.(*Commit).Committer.When.After(commit.Committer.When) &&
in.Next().Value.(*Commit).Committer.When.Before(commit.Committer.When) {
break
}
}
in = in.Next()
}
e = l.InsertAfter(commit, in)
}
var pr = parent
if commit.ParentCount() > 1 {
pr = e
}
for i := 0; i < commit.ParentCount(); i++ {
id, err := commit.ParentId(i)
if err != nil {
return err
}
err = repo.commitsBefore(lock, l, pr, id, 0)
if err != nil {
return err
}
}
return nil
}
func (repo *Repository) CommitsCount(commitId string) (int, error) {
id, err := NewIdFromString(commitId)
if err != nil {
return 0, err
}
return repo.commitsCount(id)
}
func (repo *Repository) FileCommitsCount(branch, file string) (int, error) {
stdout, stderr, err := com.ExecCmdDir(repo.Path, "git", "rev-list", "--count",
branch, "--", file)
if err != nil {
return 0, errors.New(stderr)
}
return com.StrTo(strings.TrimSpace(stdout)).Int()
}
func (repo *Repository) CommitsByFileAndRange(branch, file string, page int) (*list.List, error) {
stdout, stderr, err := com.ExecCmdDirBytes(repo.Path, "git", "log", branch,
"--skip="+com.ToStr((page-1)*50), "--max-count=50", prettyLogFormat, "--", file)
if err != nil {
return nil, errors.New(string(stderr))
}
return parsePrettyFormatLog(repo, stdout)
}
func (repo *Repository) getCommitsBefore(id sha1) (*list.List, error) {
l := list.New()
lock := new(sync.Mutex)
err := repo.commitsBefore(lock, l, nil, id, 0)
return l, err
}
func (repo *Repository) searchCommits(id sha1, keyword string) (*list.List, error) {
stdout, stderr, err := com.ExecCmdDirBytes(repo.Path, "git", "log", id.String(), "-100",
"-i", "--grep="+keyword, prettyLogFormat)
if err != nil {
return nil, err
} else if len(stderr) > 0 {
return nil, errors.New(string(stderr))
}
return parsePrettyFormatLog(repo, stdout)
}
func (repo *Repository) commitsByRange(id sha1, page int) (*list.List, error) {
stdout, stderr, err := com.ExecCmdDirBytes(repo.Path, "git", "log", id.String(),
"--skip="+com.ToStr((page-1)*50), "--max-count=50", prettyLogFormat)
if err != nil {
return nil, errors.New(string(stderr))
}
return parsePrettyFormatLog(repo, stdout)
}
func (repo *Repository) getCommitOfRelPath(id sha1, relPath string) (*Commit, error) {
stdout, _, err := com.ExecCmdDir(repo.Path, "git", "log", "-1", prettyLogFormat, id.String(), "--", relPath)
if err != nil {
return nil, err
}
id, err = NewIdFromString(string(stdout))
if err != nil {
return nil, err
}
return repo.getCommit(id)
}