gitea/modules/git/commit.go

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// Copyright 2015 The Gogs Authors. All rights reserved.
// Copyright 2018 The Gitea Authors. All rights reserved.
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// 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"
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"container/list"
"fmt"
"io"
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"net/http"
"strconv"
"strings"
)
// Commit represents a git commit.
type Commit struct {
Branch string // Branch this commit belongs to
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Tree
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ID SHA1 // The ID of this commit object
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Author *Signature
Committer *Signature
CommitMessage string
Signature *CommitGPGSignature
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parents []SHA1 // SHA1 strings
submoduleCache *ObjectCache
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}
// CommitGPGSignature represents a git commit signature part.
type CommitGPGSignature struct {
Signature string
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")
}
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:])
}
return sig, nil
}
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// 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(strings.TrimSpace(c.CommitMessage), "\n")[0]
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}
// ParentID returns oid of n-th parent (0-based index).
// It returns nil if no such parent exists.
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func (c *Commit) ParentID(n int) (SHA1, error) {
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if n >= len(c.parents) {
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return SHA1{}, ErrNotExist{"", ""}
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}
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
}
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// IsImageFile is a file image type
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func (c *Commit) IsImageFile(name string) bool {
blob, err := c.GetBlobByPath(name)
if err != nil {
return false
}
dataRc, err := blob.DataAsync()
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if err != nil {
return false
}
defer dataRc.Close()
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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)
}
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// AddChanges marks local changes to be ready for commit.
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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
}
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// CommitChangesOptions the options when a commit created
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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
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cmd = NewCommand("rev-list", "--count")
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cmd.AddArguments(revision)
if len(relpath) > 0 {
cmd.AddArguments("--", relpath)
}
stdout, err := cmd.RunInDir(repoPath)
if err != nil {
return 0, err
}
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, "")
}
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// CommitsCount returns number of total commits of until current revision.
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func (c *Commit) CommitsCount() (int64, error) {
return CommitsCount(c.repo.Path, c.ID.String())
}
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// CommitsByRange returns the specific page commits before current revision, every page's number default by CommitsRangeSize
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func (c *Commit) CommitsByRange(page int) (*list.List, error) {
return c.repo.commitsByRange(c.ID, page)
}
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// CommitsBefore returns all the commits before current revision
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func (c *Commit) CommitsBefore() (*list.List, error) {
return c.repo.getCommitsBefore(c.ID)
}
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// CommitsBeforeLimit returns num commits before current revision
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func (c *Commit) CommitsBeforeLimit(num int) (*list.List, error) {
return c.repo.getCommitsBeforeLimit(c.ID, num)
}
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// CommitsBeforeUntil returns the commits between commitID to current revision
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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)
}
// SearchCommitsOptions specify the parameters for SearchCommits
type SearchCommitsOptions struct {
Keywords []string
Authors, Committers []string
After, Before string
All bool
}
// NewSearchCommitsOptions contruct a SearchCommitsOption from a space-delimited search string
func NewSearchCommitsOptions(searchString string, forAllRefs bool) SearchCommitsOptions {
var keywords, authors, committers []string
var after, before string
fields := strings.Fields(searchString)
for _, k := range fields {
switch {
case strings.HasPrefix(k, "author:"):
authors = append(authors, strings.TrimPrefix(k, "author:"))
case strings.HasPrefix(k, "committer:"):
committers = append(committers, strings.TrimPrefix(k, "committer:"))
case strings.HasPrefix(k, "after:"):
after = strings.TrimPrefix(k, "after:")
case strings.HasPrefix(k, "before:"):
before = strings.TrimPrefix(k, "before:")
default:
keywords = append(keywords, k)
}
}
return SearchCommitsOptions{
Keywords: keywords,
Authors: authors,
Committers: committers,
After: after,
Before: before,
All: forAllRefs,
}
}
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// SearchCommits returns the commits match the keyword before current revision
func (c *Commit) SearchCommits(opts SearchCommitsOptions) (*list.List, error) {
return c.repo.searchCommits(c.ID, opts)
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}
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// GetFilesChangedSinceCommit get all changed file names between pastCommit to current revision
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func (c *Commit) GetFilesChangedSinceCommit(pastCommit string) ([]string, error) {
return c.repo.getFilesChanged(pastCommit, c.ID.String())
}
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// GetSubModules get all the sub modules of current revision git tree
func (c *Commit) GetSubModules() (*ObjectCache, error) {
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if c.submoduleCache != nil {
return c.submoduleCache, nil
}
entry, err := c.GetTreeEntryByPath(".gitmodules")
if err != nil {
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if _, ok := err.(ErrNotExist); ok {
return nil, nil
}
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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
}
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// GetSubModule get the sub module according entryname
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func (c *Commit) GetSubModule(entryname string) (*SubModule, error) {
modules, err := c.GetSubModules()
if err != nil {
return nil, err
}
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if modules != nil {
module, has := modules.Get(entryname)
if has {
return module.(*SubModule), nil
}
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}
return nil, nil
}
// CommitFileStatus represents status of files in a commit.
type CommitFileStatus struct {
Added []string
Removed []string
Modified []string
}
// NewCommitFileStatus creates a CommitFileStatus
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
}
// 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
}