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mirror of https://github.com/go-gitea/gitea synced 2024-12-23 00:54:28 +00:00
gitea/modules/git/commit.go
wxiaoguang 0db554fa63
Refactor commit signature parser (#30228)
To make it more flexible and support SSH signature.

The existing tests are not changed, there are also tests covering
`parseTagRef` which also calls `parsePayloadSignature` now. Add some new
tests to `Test_parseTagData`
2024-04-01 20:23:17 +00:00

541 lines
15 KiB
Go

// Copyright 2015 The Gogs Authors. All rights reserved.
// Copyright 2018 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package git
import (
"bufio"
"bytes"
"context"
"errors"
"fmt"
"io"
"os/exec"
"strconv"
"strings"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/util"
)
// Commit represents a git commit.
type Commit struct {
Tree
ID ObjectID // The ID of this commit object
Author *Signature
Committer *Signature
CommitMessage string
Signature *CommitSignature
Parents []ObjectID // ID strings
submoduleCache *ObjectCache
}
// CommitSignature represents a git commit signature part.
type CommitSignature struct {
Signature string
Payload string // TODO check if can be reconstruct from the rest of commit information to not have duplicate data
}
// 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.
// The string is forced to be valid UTF8
func (c *Commit) Summary() string {
return strings.ToValidUTF8(strings.Split(strings.TrimSpace(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) (ObjectID, error) {
if n >= len(c.Parents) {
return nil, 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)
}
// GetCommitByPath return the commit of relative path object.
func (c *Commit) GetCommitByPath(relpath string) (*Commit, error) {
if c.repo.LastCommitCache != nil {
return c.repo.LastCommitCache.GetCommitByPath(c.ID.String(), relpath)
}
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 {
return AddChangesWithArgs(repoPath, globalCommandArgs, all, files...)
}
// AddChangesWithArgs marks local changes to be ready for commit.
func AddChangesWithArgs(repoPath string, globalArgs TrustedCmdArgs, all bool, files ...string) error {
cmd := NewCommandContextNoGlobals(DefaultContext, globalArgs...).AddArguments("add")
if all {
cmd.AddArguments("--all")
}
cmd.AddDashesAndList(files...)
_, _, err := cmd.RunStdString(&RunOpts{Dir: repoPath})
return err
}
// CommitChangesOptions the options when a commit created
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 {
cargs := make(TrustedCmdArgs, len(globalCommandArgs))
copy(cargs, globalCommandArgs)
return CommitChangesWithArgs(repoPath, cargs, opts)
}
// CommitChangesWithArgs commits local changes with given committer, author and message.
// If author is nil, it will be the same as committer.
func CommitChangesWithArgs(repoPath string, args TrustedCmdArgs, opts CommitChangesOptions) error {
cmd := NewCommandContextNoGlobals(DefaultContext, args...)
if opts.Committer != nil {
cmd.AddOptionValues("-c", "user.name="+opts.Committer.Name)
cmd.AddOptionValues("-c", "user.email="+opts.Committer.Email)
}
cmd.AddArguments("commit")
if opts.Author == nil {
opts.Author = opts.Committer
}
if opts.Author != nil {
cmd.AddOptionFormat("--author='%s <%s>'", opts.Author.Name, opts.Author.Email)
}
cmd.AddOptionFormat("--message=%s", opts.Message)
_, _, err := cmd.RunStdString(&RunOpts{Dir: repoPath})
// No stderr but exit status 1 means nothing to commit.
if err != nil && err.Error() == "exit status 1" {
return nil
}
return err
}
// AllCommitsCount returns count of all commits in repository
func AllCommitsCount(ctx context.Context, repoPath string, hidePRRefs bool, files ...string) (int64, error) {
cmd := NewCommand(ctx, "rev-list")
if hidePRRefs {
cmd.AddArguments("--exclude=" + PullPrefix + "*")
}
cmd.AddArguments("--all", "--count")
if len(files) > 0 {
cmd.AddDashesAndList(files...)
}
stdout, _, err := cmd.RunStdString(&RunOpts{Dir: repoPath})
if err != nil {
return 0, err
}
return strconv.ParseInt(strings.TrimSpace(stdout), 10, 64)
}
// CommitsCountOptions the options when counting commits
type CommitsCountOptions struct {
RepoPath string
Not string
Revision []string
RelPath []string
}
// CommitsCount returns number of total commits of until given revision.
func CommitsCount(ctx context.Context, opts CommitsCountOptions) (int64, error) {
cmd := NewCommand(ctx, "rev-list", "--count")
cmd.AddDynamicArguments(opts.Revision...)
if opts.Not != "" {
cmd.AddOptionValues("--not", opts.Not)
}
if len(opts.RelPath) > 0 {
cmd.AddDashesAndList(opts.RelPath...)
}
stdout, _, err := cmd.RunStdString(&RunOpts{Dir: opts.RepoPath})
if err != nil {
return 0, err
}
return strconv.ParseInt(strings.TrimSpace(stdout), 10, 64)
}
// CommitsCount returns number of total commits of until current revision.
func (c *Commit) CommitsCount() (int64, error) {
return CommitsCount(c.repo.Ctx, CommitsCountOptions{
RepoPath: c.repo.Path,
Revision: []string{c.ID.String()},
})
}
// CommitsByRange returns the specific page commits before current revision, every page's number default by CommitsRangeSize
func (c *Commit) CommitsByRange(page, pageSize int, not string) ([]*Commit, error) {
return c.repo.commitsByRange(c.ID, page, pageSize, not)
}
// CommitsBefore returns all the commits before current revision
func (c *Commit) CommitsBefore() ([]*Commit, error) {
return c.repo.getCommitsBefore(c.ID)
}
// HasPreviousCommit returns true if a given commitHash is contained in commit's parents
func (c *Commit) HasPreviousCommit(objectID ObjectID) (bool, error) {
this := c.ID.String()
that := objectID.String()
if this == that {
return false, nil
}
_, _, err := NewCommand(c.repo.Ctx, "merge-base", "--is-ancestor").AddDynamicArguments(that, this).RunStdString(&RunOpts{Dir: c.repo.Path})
if err == nil {
return true, nil
}
var exitError *exec.ExitError
if errors.As(err, &exitError) {
if exitError.ProcessState.ExitCode() == 1 && len(exitError.Stderr) == 0 {
return false, nil
}
}
return false, err
}
// IsForcePush returns true if a push from oldCommitHash to this is a force push
func (c *Commit) IsForcePush(oldCommitID string) (bool, error) {
objectFormat, err := c.repo.GetObjectFormat()
if err != nil {
return false, err
}
if oldCommitID == objectFormat.EmptyObjectID().String() {
return false, nil
}
oldCommit, err := c.repo.GetCommit(oldCommitID)
if err != nil {
return false, err
}
hasPreviousCommit, err := c.HasPreviousCommit(oldCommit.ID)
return !hasPreviousCommit, err
}
// CommitsBeforeLimit returns num commits before current revision
func (c *Commit) CommitsBeforeLimit(num int) ([]*Commit, error) {
return c.repo.getCommitsBeforeLimit(c.ID, num)
}
// CommitsBeforeUntil returns the commits between commitID to current revision
func (c *Commit) CommitsBeforeUntil(commitID string) ([]*Commit, 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 construct 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,
}
}
// SearchCommits returns the commits match the keyword before current revision
func (c *Commit) SearchCommits(opts SearchCommitsOptions) ([]*Commit, error) {
return c.repo.searchCommits(c.ID, opts)
}
// GetFilesChangedSinceCommit get all changed file names between pastCommit to current revision
func (c *Commit) GetFilesChangedSinceCommit(pastCommit string) ([]string, error) {
return c.repo.GetFilesChangedBetween(pastCommit, c.ID.String())
}
// FileChangedSinceCommit Returns true if the file given has changed since the past commit
// YOU MUST ENSURE THAT pastCommit is a valid commit ID.
func (c *Commit) FileChangedSinceCommit(filename, pastCommit string) (bool, error) {
return c.repo.FileChangedBetweenCommits(filename, pastCommit, c.ID.String())
}
// HasFile returns true if the file given exists on this commit
// This does only mean it's there - it does not mean the file was changed during the commit.
func (c *Commit) HasFile(filename string) (bool, error) {
_, err := c.GetBlobByPath(filename)
if err != nil {
return false, err
}
return true, nil
}
// GetFileContent reads a file content as a string or returns false if this was not possible
func (c *Commit) GetFileContent(filename string, limit int) (string, error) {
entry, err := c.GetTreeEntryByPath(filename)
if err != nil {
return "", err
}
r, err := entry.Blob().DataAsync()
if err != nil {
return "", err
}
defer r.Close()
if limit > 0 {
bs := make([]byte, limit)
n, err := util.ReadAtMost(r, bs)
if err != nil {
return "", err
}
return string(bs[:n]), nil
}
bytes, err := io.ReadAll(r)
if err != nil {
return "", err
}
return string(bytes), nil
}
// GetSubModules get all the sub modules of current revision git tree
func (c *Commit) GetSubModules() (*ObjectCache, error) {
if c.submoduleCache != nil {
return c.submoduleCache, nil
}
entry, err := c.GetTreeEntryByPath(".gitmodules")
if err != nil {
if _, ok := err.(ErrNotExist); ok {
return nil, nil
}
return nil, err
}
rd, err := entry.Blob().DataAsync()
if err != nil {
return nil, err
}
defer rd.Close()
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
}
}
}
if err = scanner.Err(); err != nil {
return nil, fmt.Errorf("GetSubModules scan: %w", err)
}
return c.submoduleCache, nil
}
// GetSubModule get the sub module according entryname
func (c *Commit) GetSubModule(entryname string) (*SubModule, error) {
modules, err := c.GetSubModules()
if err != nil {
return nil, err
}
if modules != nil {
module, has := modules.Get(entryname)
if has {
return module.(*SubModule), nil
}
}
return nil, nil
}
// GetBranchName gets the closest branch name (as returned by 'git name-rev --name-only')
func (c *Commit) GetBranchName() (string, error) {
cmd := NewCommand(c.repo.Ctx, "name-rev")
if CheckGitVersionAtLeast("2.13.0") == nil {
cmd.AddArguments("--exclude", "refs/tags/*")
}
cmd.AddArguments("--name-only", "--no-undefined").AddDynamicArguments(c.ID.String())
data, _, err := cmd.RunStdString(&RunOpts{Dir: c.repo.Path})
if err != nil {
// handle special case where git can not describe commit
if strings.Contains(err.Error(), "cannot describe") {
return "", nil
}
return "", err
}
// name-rev commitID output will be "master" or "master~12"
return strings.SplitN(strings.TrimSpace(data), "~", 2)[0], 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{},
}
}
func parseCommitFileStatus(fileStatus *CommitFileStatus, stdout io.Reader) {
rd := bufio.NewReader(stdout)
peek, err := rd.Peek(1)
if err != nil {
if err != io.EOF {
log.Error("Unexpected error whilst reading from git log --name-status. Error: %v", err)
}
return
}
if peek[0] == '\n' || peek[0] == '\x00' {
_, _ = rd.Discard(1)
}
for {
modifier, err := rd.ReadSlice('\x00')
if err != nil {
if err != io.EOF {
log.Error("Unexpected error whilst reading from git log --name-status. Error: %v", err)
}
return
}
file, err := rd.ReadString('\x00')
if err != nil {
if err != io.EOF {
log.Error("Unexpected error whilst reading from git log --name-status. Error: %v", err)
}
return
}
file = file[:len(file)-1]
switch modifier[0] {
case 'A':
fileStatus.Added = append(fileStatus.Added, file)
case 'D':
fileStatus.Removed = append(fileStatus.Removed, file)
case 'M':
fileStatus.Modified = append(fileStatus.Modified, file)
}
}
}
// GetCommitFileStatus returns file status of commit in given repository.
func GetCommitFileStatus(ctx context.Context, repoPath, commitID string) (*CommitFileStatus, error) {
stdout, w := io.Pipe()
done := make(chan struct{})
fileStatus := NewCommitFileStatus()
go func() {
parseCommitFileStatus(fileStatus, stdout)
close(done)
}()
stderr := new(bytes.Buffer)
err := NewCommand(ctx, "log", "--name-status", "-m", "--pretty=format:", "--first-parent", "--no-renames", "-z", "-1").AddDynamicArguments(commitID).Run(&RunOpts{
Dir: repoPath,
Stdout: w,
Stderr: 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(ctx context.Context, repoPath, shortID string) (string, error) {
commitID, _, err := NewCommand(ctx, "rev-parse").AddDynamicArguments(shortID).RunStdString(&RunOpts{Dir: repoPath})
if err != nil {
if strings.Contains(err.Error(), "exit status 128") {
return "", ErrNotExist{shortID, ""}
}
return "", err
}
return strings.TrimSpace(commitID), nil
}
// GetRepositoryDefaultPublicGPGKey returns the default public key for this commit
func (c *Commit) GetRepositoryDefaultPublicGPGKey(forceUpdate bool) (*GPGSettings, error) {
if c.repo == nil {
return nil, nil
}
return c.repo.GetDefaultPublicGPGKey(forceUpdate)
}