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commit.go
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commit.go
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// Copyright 2015 The Gogs Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package git
import (
"bufio"
"bytes"
"container/list"
"fmt"
"io"
"net/http"
"strconv"
"strings"
"github.com/mcuadros/go-version"
)
// Commit represents a git commit.
type Commit struct {
Tree
ID sha1 // The ID of this commit object
Author *Signature
Committer *Signature
CommitMessage string
parents []sha1 // SHA1 strings
submoduleCache *objectCache
}
// Message returns the commit message. Same as retrieving CommitMessage directly.
func (c *Commit) Message() string {
return c.CommitMessage
}
// Summary returns first line of commit message.
func (c *Commit) Summary() string {
return strings.Split(c.CommitMessage, "\n")[0]
}
// ParentID returns oid of n-th parent (0-based index).
// It returns nil if no such parent exists.
func (c *Commit) ParentID(n int) (sha1, error) {
if n >= len(c.parents) {
return sha1{}, ErrNotExist{"", ""}
}
return c.parents[n], nil
}
// Parent returns n-th parent (0-based index) of the commit.
func (c *Commit) Parent(n int) (*Commit, error) {
id, err := c.ParentID(n)
if err != nil {
return nil, err
}
parent, err := c.repo.getCommit(id)
if err != nil {
return nil, err
}
return parent, nil
}
// ParentCount returns number of parents of the commit.
// 0 if this is the root commit, otherwise 1,2, etc.
func (c *Commit) ParentCount() int {
return len(c.parents)
}
func isImageFile(data []byte) (string, bool) {
contentType := http.DetectContentType(data)
if strings.Index(contentType, "image/") != -1 {
return contentType, true
}
return contentType, false
}
func (c *Commit) IsImageFile(name string) bool {
blob, err := c.GetBlobByPath(name)
if err != nil {
return false
}
dataRc, err := blob.Data()
if err != nil {
return false
}
buf := make([]byte, 1024)
n, _ := dataRc.Read(buf)
buf = buf[:n]
_, isImage := isImageFile(buf)
return isImage
}
// GetCommitByPath return the commit of relative path object.
func (c *Commit) GetCommitByPath(relpath string) (*Commit, error) {
return c.repo.getCommitByPathWithID(c.ID, relpath)
}
// AddChanges marks local changes to be ready for commit.
func AddChanges(repoPath string, all bool, files ...string) error {
cmd := NewCommand("add")
if all {
cmd.AddArguments("--all")
}
_, err := cmd.AddArguments(files...).RunInDir(repoPath)
return err
}
type CommitChangesOptions struct {
Committer *Signature
Author *Signature
Message string
}
// CommitChanges commits local changes with given committer, author and message.
// If author is nil, it will be the same as committer.
func CommitChanges(repoPath string, opts CommitChangesOptions) error {
cmd := NewCommand()
if opts.Committer != nil {
cmd.AddEnvs("GIT_COMMITTER_NAME="+opts.Committer.Name, "GIT_COMMITTER_EMAIL="+opts.Committer.Email)
}
cmd.AddArguments("commit")
if opts.Author == nil {
opts.Author = opts.Committer
}
if opts.Author != nil {
cmd.AddArguments(fmt.Sprintf("--author='%s <%s>'", opts.Author.Name, opts.Author.Email))
}
cmd.AddArguments("-m", opts.Message)
_, err := cmd.RunInDir(repoPath)
// No stderr but exit status 1 means nothing to commit.
if err != nil && err.Error() == "exit status 1" {
return nil
}
return err
}
func commitsCount(repoPath, revision, relpath string) (int64, error) {
var cmd *Command
isFallback := false
if version.Compare(gitVersion, "1.8.0", "<") {
isFallback = true
cmd = NewCommand("log", "--pretty=format:''")
} else {
cmd = NewCommand("rev-list", "--count")
}
cmd.AddArguments(revision)
if len(relpath) > 0 {
cmd.AddArguments("--", relpath)
}
stdout, err := cmd.RunInDir(repoPath)
if err != nil {
return 0, err
}
if isFallback {
return int64(strings.Count(stdout, "\n")) + 1, nil
}
return strconv.ParseInt(strings.TrimSpace(stdout), 10, 64)
}
func (c *Commit) CommitsCount() (int64, error) {
return CommitsCount(c.repo.Path, c.ID.String())
}
func (c *Commit) CommitsByRangeSize(page, size int) (*list.List, error) {
return c.repo.CommitsByRangeSize(c.ID.String(), page, size)
}
func (c *Commit) CommitsByRange(page int) (*list.List, error) {
return c.repo.CommitsByRange(c.ID.String(), page)
}
func (c *Commit) CommitsBefore() (*list.List, error) {
return c.repo.getCommitsBefore(c.ID)
}
func (c *Commit) CommitsBeforeLimit(num int) (*list.List, error) {
return c.repo.getCommitsBeforeLimit(c.ID, num)
}
func (c *Commit) CommitsBeforeUntil(commitID string) (*list.List, error) {
endCommit, err := c.repo.GetCommit(commitID)
if err != nil {
return nil, err
}
return c.repo.CommitsBetween(c, endCommit)
}
func (c *Commit) SearchCommits(keyword string) (*list.List, error) {
return c.repo.searchCommits(c.ID, keyword)
}
func (c *Commit) GetFilesChangedSinceCommit(pastCommit string) ([]string, error) {
return c.repo.getFilesChanged(pastCommit, c.ID.String())
}
func (c *Commit) GetSubModules() (*objectCache, error) {
if c.submoduleCache != nil {
return c.submoduleCache, nil
}
entry, err := c.GetTreeEntryByPath(".gitmodules")
if err != nil {
return nil, err
}
rd, err := entry.Blob().Data()
if err != nil {
return nil, err
}
scanner := bufio.NewScanner(rd)
c.submoduleCache = newObjectCache()
var ismodule bool
var path string
for scanner.Scan() {
if strings.HasPrefix(scanner.Text(), "[submodule") {
ismodule = true
continue
}
if ismodule {
fields := strings.Split(scanner.Text(), "=")
k := strings.TrimSpace(fields[0])
if k == "path" {
path = strings.TrimSpace(fields[1])
} else if k == "url" {
c.submoduleCache.Set(path, &SubModule{path, strings.TrimSpace(fields[1])})
ismodule = false
}
}
}
return c.submoduleCache, nil
}
func (c *Commit) GetSubModule(entryname string) (*SubModule, error) {
modules, err := c.GetSubModules()
if err != nil {
return nil, err
}
module, has := modules.Get(entryname)
if has {
return module.(*SubModule), nil
}
return nil, nil
}
// CommitFileStatus represents status of files in a commit.
type CommitFileStatus struct {
Added []string
Removed []string
Modified []string
}
func NewCommitFileStatus() *CommitFileStatus {
return &CommitFileStatus{
[]string{}, []string{}, []string{},
}
}
// GetCommitFileStatus returns file status of commit in given repository.
func GetCommitFileStatus(repoPath, commitID string) (*CommitFileStatus, error) {
stdout, w := io.Pipe()
done := make(chan struct{})
fileStatus := NewCommitFileStatus()
go func() {
scanner := bufio.NewScanner(stdout)
for scanner.Scan() {
fields := strings.Fields(scanner.Text())
if len(fields) < 2 {
continue
}
switch fields[0][0] {
case 'A':
fileStatus.Added = append(fileStatus.Added, fields[1])
case 'D':
fileStatus.Removed = append(fileStatus.Removed, fields[1])
case 'M':
fileStatus.Modified = append(fileStatus.Modified, fields[1])
}
}
done <- struct{}{}
}()
stderr := new(bytes.Buffer)
err := NewCommand("show", "--name-status", "--pretty=format:''", commitID).RunInDirPipeline(repoPath, w, stderr)
w.Close() // Close writer to exit parsing goroutine
if err != nil {
return nil, concatenateError(err, stderr.String())
}
<-done
return fileStatus, nil
}
// FileStatus returns file status of commit.
func (c *Commit) FileStatus() (*CommitFileStatus, error) {
return GetCommitFileStatus(c.repo.Path, c.ID.String())
}
// GetFullCommitID returns full length (40) of commit ID by given short SHA in a repository.
func GetFullCommitID(repoPath, shortID string) (string, error) {
if len(shortID) >= 40 {
return shortID, nil
}
commitID, err := NewCommand("rev-parse", shortID).RunInDir(repoPath)
if err != nil {
if strings.Contains(err.Error(), "exit status 128") {
return "", ErrNotExist{shortID, ""}
}
return "", err
}
return strings.TrimSpace(commitID), nil
}