aboutsummaryrefslogtreecommitdiff
path: root/modules/git/commit.go
blob: 6e8fcb3e0802e82de1f930c2b0813ee68f5926ee (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
// 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"
	"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 {
	Branch string // Branch this commit belongs to
	Tree
	ID            SHA1 // The ID of this commit object
	Author        *Signature
	Committer     *Signature
	CommitMessage string
	Signature     *CommitGPGSignature

	Parents        []SHA1 // SHA1 strings
	submoduleCache *ObjectCache
}

// 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
}

// 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]
}

// 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)
}

// 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)
}

// CommitsCountFiles returns number of total commits of until given revision.
func CommitsCountFiles(ctx context.Context, repoPath string, revision, relpath []string) (int64, error) {
	cmd := NewCommand(ctx, "rev-list", "--count")
	cmd.AddDynamicArguments(revision...)
	if len(relpath) > 0 {
		cmd.AddDashesAndList(relpath...)
	}

	stdout, _, err := cmd.RunStdString(&RunOpts{Dir: 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(ctx context.Context, repoPath string, revision ...string) (int64, error) {
	return CommitsCountFiles(ctx, repoPath, revision, []string{})
}

// CommitsCount returns number of total commits of until current revision.
func (c *Commit) CommitsCount() (int64, error) {
	return CommitsCount(c.repo.Ctx, c.repo.Path, 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) ([]*Commit, error) {
	return c.repo.commitsByRange(c.ID, page, pageSize)
}

// 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(commitHash SHA1) (bool, error) {
	this := c.ID.String()
	that := commitHash.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) {
	if oldCommitID == EmptySHA {
		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.getFilesChanged(pastCommit, c.ID.String())
}

// FileChangedSinceCommit Returns true if the file given has changed since the 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
			}
		}
	}

	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
}

// LoadBranchName load branch name for commit
func (c *Commit) LoadBranchName() (err error) {
	if len(c.Branch) != 0 {
		return
	}

	c.Branch, err = c.GetBranchName()
	return err
}

// GetTagName gets the current tag name for given commit
func (c *Commit) GetTagName() (string, error) {
	data, _, err := NewCommand(c.repo.Ctx, "describe", "--exact-match", "--tags", "--always").AddDynamicArguments(c.ID.String()).RunStdString(&RunOpts{Dir: c.repo.Path})
	if err != nil {
		// handle special case where there is no tag for this commit
		if strings.Contains(err.Error(), "no tag exactly matches") {
			return "", nil
		}

		return "", err
	}

	return strings.TrimSpace(data), 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", "-c", "--pretty=format:", "--parents", "--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)
}