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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"
"container/list"
"fmt"
"net/http"
"strconv"
"strings"
"github.com/mcuadros/go-version"
)
// Commit represents a git commit.
type Commit struct {
Tree
ID sha1 // The ID of this commit object
Author *Signature
Committer *Signature
CommitMessage string
parents []sha1 // SHA1 strings
submoduleCache *objectCache
}
// Message returns the commit message. Same as retrieving CommitMessage directly.
func (c *Commit) Message() string {
return c.CommitMessage
}
// Summary returns first line of commit message.
func (c *Commit) Summary() string {
return strings.Split(c.CommitMessage, "\n")[0]
}
// ParentID returns oid of n-th parent (0-based index).
// It returns nil if no such parent exists.
func (c *Commit) ParentID(n int) (sha1, error) {
if n >= len(c.parents) {
return sha1{}, ErrNotExist{"", ""}
}
return c.parents[n], nil
}
// Parent returns n-th parent (0-based index) of the commit.
func (c *Commit) Parent(n int) (*Commit, error) {
id, err := c.ParentID(n)
if err != nil {
return nil, err
}
parent, err := c.repo.getCommit(id)
if err != nil {
return nil, err
}
return parent, nil
}
// ParentCount returns number of parents of the commit.
// 0 if this is the root commit, otherwise 1,2, etc.
func (c *Commit) ParentCount() int {
return len(c.parents)
}
func isImageFile(data []byte) (string, bool) {
contentType := http.DetectContentType(data)
if strings.Index(contentType, "image/") != -1 {
return contentType, true
}
return contentType, false
}
func (c *Commit) IsImageFile(name string) bool {
blob, err := c.GetBlobByPath(name)
if err != nil {
return false
}
dataRc, err := blob.Data()
if err != nil {
return false
}
buf := make([]byte, 1024)
n, _ := dataRc.Read(buf)
buf = buf[:n]
_, isImage := isImageFile(buf)
return isImage
}
// GetCommitByPath return the commit of relative path object.
func (c *Commit) GetCommitByPath(relpath string) (*Commit, error) {
return c.repo.getCommitByPathWithID(c.ID, relpath)
}
// AddAllChanges marks local changes to be ready for commit.
func AddChanges(repoPath string, all bool, files ...string) error {
cmd := NewCommand("add")
if all {
cmd.AddArguments("--all")
}
_, err := cmd.AddArguments(files...).RunInDir(repoPath)
return err
}
type CommitChangesOptions struct {
Committer *Signature
Author *Signature
Message string
}
// CommitChanges commits local changes with given committer, author and message.
// If author is nil, it will be the same as committer.
func CommitChanges(repoPath string, opts CommitChangesOptions) error {
cmd := NewCommand()
if opts.Committer != nil {
cmd.AddArguments("-c", "user.name="+opts.Committer.Name, "-c", "user.email="+opts.Committer.Email)
}
cmd.AddArguments("commit")
if opts.Author == nil {
opts.Author = opts.Committer
}
if opts.Author != nil {
cmd.AddArguments(fmt.Sprintf("--author='%s <%s>'", opts.Author.Name, opts.Author.Email))
}
cmd.AddArguments("-m", opts.Message)
_, err := cmd.RunInDir(repoPath)
// No stderr but exit status 1 means nothing to commit.
if err != nil && err.Error() == "exit status 1" {
return nil
}
return err
}
func commitsCount(repoPath, revision, relpath string) (int64, error) {
var cmd *Command
isFallback := false
if version.Compare(gitVersion, "1.8.0", "<") {
isFallback = true
cmd = NewCommand("log", "--pretty=format:''")
} else {
cmd = NewCommand("rev-list", "--count")
}
cmd.AddArguments(revision)
if len(relpath) > 0 {
cmd.AddArguments("--", relpath)
}
stdout, err := cmd.RunInDir(repoPath)
if err != nil {
return 0, err
}
if isFallback {
return int64(strings.Count(stdout, "\n")) + 1, nil
}
return strconv.ParseInt(strings.TrimSpace(stdout), 10, 64)
}
// CommitsCount returns number of total commits of until given revision.
func CommitsCount(repoPath, revision string) (int64, error) {
return commitsCount(repoPath, revision, "")
}
func (c *Commit) CommitsCount() (int64, error) {
return CommitsCount(c.repo.Path, c.ID.String())
}
func (c *Commit) CommitsByRange(page int) (*list.List, error) {
return c.repo.commitsByRange(c.ID, page)
}
func (c *Commit) CommitsBefore() (*list.List, error) {
return c.repo.getCommitsBefore(c.ID)
}
func (c *Commit) CommitsBeforeLimit(num int) (*list.List, error) {
return c.repo.getCommitsBeforeLimit(c.ID, num)
}
func (c *Commit) CommitsBeforeUntil(commitID string) (*list.List, error) {
endCommit, err := c.repo.GetCommit(commitID)
if err != nil {
return nil, err
}
return c.repo.CommitsBetween(c, endCommit)
}
func (c *Commit) SearchCommits(keyword string) (*list.List, error) {
return c.repo.searchCommits(c.ID, keyword)
}
func (c *Commit) GetFilesChangedSinceCommit(pastCommit string) ([]string, error) {
return c.repo.getFilesChanged(pastCommit, c.ID.String())
}
func (c *Commit) GetSubModules() (*objectCache, error) {
if c.submoduleCache != nil {
return c.submoduleCache, nil
}
entry, err := c.GetTreeEntryByPath(".gitmodules")
if err != nil {
return nil, err
}
rd, err := entry.Blob().Data()
if err != nil {
return nil, err
}
scanner := bufio.NewScanner(rd)
c.submoduleCache = newObjectCache()
var ismodule bool
var path string
for scanner.Scan() {
if strings.HasPrefix(scanner.Text(), "[submodule") {
ismodule = true
continue
}
if ismodule {
fields := strings.Split(scanner.Text(), "=")
k := strings.TrimSpace(fields[0])
if k == "path" {
path = strings.TrimSpace(fields[1])
} else if k == "url" {
c.submoduleCache.Set(path, &SubModule{path, strings.TrimSpace(fields[1])})
ismodule = false
}
}
}
return c.submoduleCache, nil
}
func (c *Commit) GetSubModule(entryname string) (*SubModule, error) {
modules, err := c.GetSubModules()
if err != nil {
return nil, err
}
module, has := modules.Get(entryname)
if has {
return module.(*SubModule), nil
}
return nil, nil
}
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