git@vger.kernel.org list mirror (unofficial, one of many)
 help / color / Atom feed
affcdfb4169899c2affee51593f0453d5d9b9add blob 16922 bytes (raw)

  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
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
 
/*
 * Builtin "git replace"
 *
 * Copyright (c) 2008 Christian Couder <chriscool@tuxfamily.org>
 *
 * Based on builtin/tag.c by Kristian Høgsberg <krh@redhat.com>
 * and Carlos Rica <jasampler@gmail.com> that was itself based on
 * git-tag.sh and mktag.c by Linus Torvalds.
 */

#include "cache.h"
#include "config.h"
#include "builtin.h"
#include "refs.h"
#include "parse-options.h"
#include "run-command.h"
#include "object-store.h"
#include "repository.h"
#include "tag.h"

static const char * const git_replace_usage[] = {
	N_("git replace [-f] <object> <replacement>"),
	N_("git replace [-f] --edit <object>"),
	N_("git replace [-f] --graft <commit> [<parent>...]"),
	N_("git replace [-f] --convert-graft-file"),
	N_("git replace -d <object>..."),
	N_("git replace [--format=<format>] [-l [<pattern>]]"),
	NULL
};

enum replace_format {
	REPLACE_FORMAT_SHORT,
	REPLACE_FORMAT_MEDIUM,
	REPLACE_FORMAT_LONG
};

struct show_data {
	const char *pattern;
	enum replace_format format;
};

static int show_reference(struct repository *r, const char *refname,
			  const struct object_id *oid,
			  int flag, void *cb_data)
{
	struct show_data *data = cb_data;

	if (!wildmatch(data->pattern, refname, 0)) {
		if (data->format == REPLACE_FORMAT_SHORT)
			printf("%s\n", refname);
		else if (data->format == REPLACE_FORMAT_MEDIUM)
			printf("%s -> %s\n", refname, oid_to_hex(oid));
		else { /* data->format == REPLACE_FORMAT_LONG */
			struct object_id object;
			enum object_type obj_type, repl_type;

			if (get_oid(refname, &object))
				return error(_("failed to resolve '%s' as a valid ref"), refname);

			obj_type = oid_object_info(r, &object, NULL);
			repl_type = oid_object_info(r, oid, NULL);

			printf("%s (%s) -> %s (%s)\n", refname, type_name(obj_type),
			       oid_to_hex(oid), type_name(repl_type));
		}
	}

	return 0;
}

static int list_replace_refs(const char *pattern, const char *format)
{
	struct show_data data;

	if (pattern == NULL)
		pattern = "*";
	data.pattern = pattern;

	if (format == NULL || *format == '\0' || !strcmp(format, "short"))
		data.format = REPLACE_FORMAT_SHORT;
	else if (!strcmp(format, "medium"))
		data.format = REPLACE_FORMAT_MEDIUM;
	else if (!strcmp(format, "long"))
		data.format = REPLACE_FORMAT_LONG;
	else
		return error(_("invalid replace format '%s'\n"
			       "valid formats are 'short', 'medium' and 'long'"),
			     format);

	for_each_replace_ref(the_repository, show_reference, (void *)&data);

	return 0;
}

typedef int (*each_replace_name_fn)(const char *name, const char *ref,
				    const struct object_id *oid);

static int for_each_replace_name(const char **argv, each_replace_name_fn fn)
{
	const char **p, *full_hex;
	struct strbuf ref = STRBUF_INIT;
	size_t base_len;
	int had_error = 0;
	struct object_id oid;

	strbuf_addstr(&ref, git_replace_ref_base);
	base_len = ref.len;

	for (p = argv; *p; p++) {
		if (get_oid(*p, &oid)) {
			error("failed to resolve '%s' as a valid ref", *p);
			had_error = 1;
			continue;
		}

		strbuf_setlen(&ref, base_len);
		strbuf_addstr(&ref, oid_to_hex(&oid));
		full_hex = ref.buf + base_len;

		if (read_ref(ref.buf, &oid)) {
			error(_("replace ref '%s' not found"), full_hex);
			had_error = 1;
			continue;
		}
		if (fn(full_hex, ref.buf, &oid))
			had_error = 1;
	}
	strbuf_release(&ref);
	return had_error;
}

static int delete_replace_ref(const char *name, const char *ref,
			      const struct object_id *oid)
{
	if (delete_ref(NULL, ref, oid, 0))
		return 1;
	printf_ln(_("Deleted replace ref '%s'"), name);
	return 0;
}

static int check_ref_valid(struct object_id *object,
			    struct object_id *prev,
			    struct strbuf *ref,
			    int force)
{
	strbuf_reset(ref);
	strbuf_addf(ref, "%s%s", git_replace_ref_base, oid_to_hex(object));
	if (check_refname_format(ref->buf, 0))
		return error(_("'%s' is not a valid ref name"), ref->buf);

	if (read_ref(ref->buf, prev))
		oidclr(prev);
	else if (!force)
		return error(_("replace ref '%s' already exists"), ref->buf);
	return 0;
}

static int replace_object_oid(const char *object_ref,
			       struct object_id *object,
			       const char *replace_ref,
			       struct object_id *repl,
			       int force)
{
	struct object_id prev;
	enum object_type obj_type, repl_type;
	struct strbuf ref = STRBUF_INIT;
	struct ref_transaction *transaction;
	struct strbuf err = STRBUF_INIT;
	int res = 0;

	obj_type = oid_object_info(the_repository, object, NULL);
	repl_type = oid_object_info(the_repository, repl, NULL);
	if (!force && obj_type != repl_type)
		return error(_("Objects must be of the same type.\n"
			       "'%s' points to a replaced object of type '%s'\n"
			       "while '%s' points to a replacement object of "
			       "type '%s'."),
			     object_ref, type_name(obj_type),
			     replace_ref, type_name(repl_type));

	if (check_ref_valid(object, &prev, &ref, force)) {
		strbuf_release(&ref);
		return -1;
	}

	transaction = ref_transaction_begin(&err);
	if (!transaction ||
	    ref_transaction_update(transaction, ref.buf, repl, &prev,
				   0, NULL, &err) ||
	    ref_transaction_commit(transaction, &err))
		res = error("%s", err.buf);

	ref_transaction_free(transaction);
	strbuf_release(&ref);
	return res;
}

static int replace_object(const char *object_ref, const char *replace_ref, int force)
{
	struct object_id object, repl;

	if (get_oid(object_ref, &object))
		return error(_("failed to resolve '%s' as a valid ref"),
			     object_ref);
	if (get_oid(replace_ref, &repl))
		return error(_("failed to resolve '%s' as a valid ref"),
			     replace_ref);

	return replace_object_oid(object_ref, &object, replace_ref, &repl, force);
}

/*
 * Write the contents of the object named by "sha1" to the file "filename".
 * If "raw" is true, then the object's raw contents are printed according to
 * "type". Otherwise, we pretty-print the contents for human editing.
 */
static int export_object(const struct object_id *oid, enum object_type type,
			  int raw, const char *filename)
{
	struct child_process cmd = CHILD_PROCESS_INIT;
	int fd;

	fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666);
	if (fd < 0)
		return error_errno(_("unable to open %s for writing"), filename);

	argv_array_push(&cmd.args, "--no-replace-objects");
	argv_array_push(&cmd.args, "cat-file");
	if (raw)
		argv_array_push(&cmd.args, type_name(type));
	else
		argv_array_push(&cmd.args, "-p");
	argv_array_push(&cmd.args, oid_to_hex(oid));
	cmd.git_cmd = 1;
	cmd.out = fd;

	if (run_command(&cmd))
		return error(_("cat-file reported failure"));
	return 0;
}

/*
 * Read a previously-exported (and possibly edited) object back from "filename",
 * interpreting it as "type", and writing the result to the object database.
 * The sha1 of the written object is returned via sha1.
 */
static int import_object(struct object_id *oid, enum object_type type,
			  int raw, const char *filename)
{
	int fd;

	fd = open(filename, O_RDONLY);
	if (fd < 0)
		return error_errno(_("unable to open %s for reading"), filename);

	if (!raw && type == OBJ_TREE) {
		const char *argv[] = { "mktree", NULL };
		struct child_process cmd = CHILD_PROCESS_INIT;
		struct strbuf result = STRBUF_INIT;

		cmd.argv = argv;
		cmd.git_cmd = 1;
		cmd.in = fd;
		cmd.out = -1;

		if (start_command(&cmd)) {
			close(fd);
			return error(_("unable to spawn mktree"));
		}

		if (strbuf_read(&result, cmd.out, 41) < 0) {
			error_errno(_("unable to read from mktree"));
			close(fd);
			close(cmd.out);
			return -1;
		}
		close(cmd.out);

		if (finish_command(&cmd)) {
			strbuf_release(&result);
			return error(_("mktree reported failure"));
		}
		if (get_oid_hex(result.buf, oid) < 0) {
			strbuf_release(&result);
			return error(_("mktree did not return an object name"));
		}

		strbuf_release(&result);
	} else {
		struct stat st;
		int flags = HASH_FORMAT_CHECK | HASH_WRITE_OBJECT;

		if (fstat(fd, &st) < 0) {
			error_errno(_("unable to fstat %s"), filename);
			close(fd);
			return -1;
		}
		if (index_fd(&the_index, oid, fd, &st, type, NULL, flags) < 0)
			return error(_("unable to write object to database"));
		/* index_fd close()s fd for us */
	}

	/*
	 * No need to close(fd) here; both run-command and index-fd
	 * will have done it for us.
	 */
	return 0;
}

static int edit_and_replace(const char *object_ref, int force, int raw)
{
	char *tmpfile;
	enum object_type type;
	struct object_id old_oid, new_oid, prev;
	struct strbuf ref = STRBUF_INIT;

	if (get_oid(object_ref, &old_oid) < 0)
		return error(_("not a valid object name: '%s'"), object_ref);

	type = oid_object_info(the_repository, &old_oid, NULL);
	if (type < 0)
		return error(_("unable to get object type for %s"),
			     oid_to_hex(&old_oid));

	if (check_ref_valid(&old_oid, &prev, &ref, force)) {
		strbuf_release(&ref);
		return -1;
	}
	strbuf_release(&ref);

	tmpfile = git_pathdup("REPLACE_EDITOBJ");
	if (export_object(&old_oid, type, raw, tmpfile)) {
		free(tmpfile);
		return -1;
	}
	if (launch_editor(tmpfile, NULL, NULL) < 0) {
		free(tmpfile);
		return error(_("editing object file failed"));
	}
	if (import_object(&new_oid, type, raw, tmpfile)) {
		free(tmpfile);
		return -1;
	}
	free(tmpfile);

	if (oideq(&old_oid, &new_oid))
		return error(_("new object is the same as the old one: '%s'"), oid_to_hex(&old_oid));

	return replace_object_oid(object_ref, &old_oid, "replacement", &new_oid, force);
}

static int replace_parents(struct strbuf *buf, int argc, const char **argv)
{
	struct strbuf new_parents = STRBUF_INIT;
	const char *parent_start, *parent_end;
	int i;

	/* find existing parents */
	parent_start = buf->buf;
	parent_start += GIT_SHA1_HEXSZ + 6; /* "tree " + "hex sha1" + "\n" */
	parent_end = parent_start;

	while (starts_with(parent_end, "parent "))
		parent_end += 48; /* "parent " + "hex sha1" + "\n" */

	/* prepare new parents */
	for (i = 0; i < argc; i++) {
		struct object_id oid;
		if (get_oid(argv[i], &oid) < 0) {
			strbuf_release(&new_parents);
			return error(_("not a valid object name: '%s'"),
				     argv[i]);
		}
		if (!lookup_commit_reference(the_repository, &oid)) {
			strbuf_release(&new_parents);
			return error(_("could not parse %s"), argv[i]);
		}
		strbuf_addf(&new_parents, "parent %s\n", oid_to_hex(&oid));
	}

	/* replace existing parents with new ones */
	strbuf_splice(buf, parent_start - buf->buf, parent_end - parent_start,
		      new_parents.buf, new_parents.len);

	strbuf_release(&new_parents);
	return 0;
}

struct check_mergetag_data {
	int argc;
	const char **argv;
};

static int check_one_mergetag(struct commit *commit,
			       struct commit_extra_header *extra,
			       void *data)
{
	struct check_mergetag_data *mergetag_data = (struct check_mergetag_data *)data;
	const char *ref = mergetag_data->argv[0];
	struct object_id tag_oid;
	struct tag *tag;
	int i;

	hash_object_file(extra->value, extra->len, type_name(OBJ_TAG), &tag_oid);
	tag = lookup_tag(the_repository, &tag_oid);
	if (!tag)
		return error(_("bad mergetag in commit '%s'"), ref);
	if (parse_tag_buffer(the_repository, tag, extra->value, extra->len))
		return error(_("malformed mergetag in commit '%s'"), ref);

	/* iterate over new parents */
	for (i = 1; i < mergetag_data->argc; i++) {
		struct object_id oid;
		if (get_oid(mergetag_data->argv[i], &oid) < 0)
			return error(_("not a valid object name: '%s'"),
				     mergetag_data->argv[i]);
		if (oideq(&tag->tagged->oid, &oid))
			return 0; /* found */
	}

	return error(_("original commit '%s' contains mergetag '%s' that is "
		       "discarded; use --edit instead of --graft"), ref,
		     oid_to_hex(&tag_oid));
}

static int check_mergetags(struct commit *commit, int argc, const char **argv)
{
	struct check_mergetag_data mergetag_data;

	mergetag_data.argc = argc;
	mergetag_data.argv = argv;
	return for_each_mergetag(check_one_mergetag, commit, &mergetag_data);
}

static int create_graft(int argc, const char **argv, int force, int gentle)
{
	struct object_id old_oid, new_oid;
	const char *old_ref = argv[0];
	struct commit *commit;
	struct strbuf buf = STRBUF_INIT;
	const char *buffer;
	unsigned long size;

	if (get_oid(old_ref, &old_oid) < 0)
		return error(_("not a valid object name: '%s'"), old_ref);
	commit = lookup_commit_reference(the_repository, &old_oid);
	if (!commit)
		return error(_("could not parse %s"), old_ref);

	buffer = get_commit_buffer(commit, &size);
	strbuf_add(&buf, buffer, size);
	unuse_commit_buffer(commit, buffer);

	if (replace_parents(&buf, argc - 1, &argv[1]) < 0) {
		strbuf_release(&buf);
		return -1;
	}

	if (remove_signature(&buf)) {
		warning(_("the original commit '%s' has a gpg signature"), old_ref);
		warning(_("the signature will be removed in the replacement commit!"));
	}

	if (check_mergetags(commit, argc, argv)) {
		strbuf_release(&buf);
		return -1;
	}

	if (write_object_file(buf.buf, buf.len, commit_type, &new_oid)) {
		strbuf_release(&buf);
		return error(_("could not write replacement commit for: '%s'"),
			     old_ref);
	}

	strbuf_release(&buf);

	if (oideq(&old_oid, &new_oid)) {
		if (gentle) {
			warning(_("graft for '%s' unnecessary"), oid_to_hex(&old_oid));
			return 0;
		}
		return error(_("new commit is the same as the old one: '%s'"), oid_to_hex(&old_oid));
	}

	return replace_object_oid(old_ref, &old_oid, "replacement", &new_oid, force);
}

static int convert_graft_file(int force)
{
	const char *graft_file = get_graft_file(the_repository);
	FILE *fp = fopen_or_warn(graft_file, "r");
	struct strbuf buf = STRBUF_INIT, err = STRBUF_INIT;
	struct argv_array args = ARGV_ARRAY_INIT;

	if (!fp)
		return -1;

	advice_graft_file_deprecated = 0;
	while (strbuf_getline(&buf, fp) != EOF) {
		if (*buf.buf == '#')
			continue;

		argv_array_split(&args, buf.buf);
		if (args.argc && create_graft(args.argc, args.argv, force, 1))
			strbuf_addf(&err, "\n\t%s", buf.buf);
		argv_array_clear(&args);
	}
	fclose(fp);

	strbuf_release(&buf);

	if (!err.len)
		return unlink_or_warn(graft_file);

	warning(_("could not convert the following graft(s):\n%s"), err.buf);
	strbuf_release(&err);

	return -1;
}

int cmd_replace(int argc, const char **argv, const char *prefix)
{
	int force = 0;
	int raw = 0;
	const char *format = NULL;
	enum {
		MODE_UNSPECIFIED = 0,
		MODE_LIST,
		MODE_DELETE,
		MODE_EDIT,
		MODE_GRAFT,
		MODE_CONVERT_GRAFT_FILE,
		MODE_REPLACE
	} cmdmode = MODE_UNSPECIFIED;
	struct option options[] = {
		OPT_CMDMODE('l', "list", &cmdmode, N_("list replace refs"), MODE_LIST),
		OPT_CMDMODE('d', "delete", &cmdmode, N_("delete replace refs"), MODE_DELETE),
		OPT_CMDMODE('e', "edit", &cmdmode, N_("edit existing object"), MODE_EDIT),
		OPT_CMDMODE('g', "graft", &cmdmode, N_("change a commit's parents"), MODE_GRAFT),
		OPT_CMDMODE(0, "convert-graft-file", &cmdmode, N_("convert existing graft file"), MODE_CONVERT_GRAFT_FILE),
		OPT_BOOL_F('f', "force", &force, N_("replace the ref if it exists"),
			   PARSE_OPT_NOCOMPLETE),
		OPT_BOOL(0, "raw", &raw, N_("do not pretty-print contents for --edit")),
		OPT_STRING(0, "format", &format, N_("format"), N_("use this format")),
		OPT_END()
	};

	read_replace_refs = 0;
	git_config(git_default_config, NULL);

	argc = parse_options(argc, argv, prefix, options, git_replace_usage, 0);

	if (!cmdmode)
		cmdmode = argc ? MODE_REPLACE : MODE_LIST;

	if (format && cmdmode != MODE_LIST)
		usage_msg_opt(_("--format cannot be used when not listing"),
			      git_replace_usage, options);

	if (force &&
	    cmdmode != MODE_REPLACE &&
	    cmdmode != MODE_EDIT &&
	    cmdmode != MODE_GRAFT &&
	    cmdmode != MODE_CONVERT_GRAFT_FILE)
		usage_msg_opt(_("-f only makes sense when writing a replacement"),
			      git_replace_usage, options);

	if (raw && cmdmode != MODE_EDIT)
		usage_msg_opt(_("--raw only makes sense with --edit"),
			      git_replace_usage, options);

	switch (cmdmode) {
	case MODE_DELETE:
		if (argc < 1)
			usage_msg_opt(_("-d needs at least one argument"),
				      git_replace_usage, options);
		return for_each_replace_name(argv, delete_replace_ref);

	case MODE_REPLACE:
		if (argc != 2)
			usage_msg_opt(_("bad number of arguments"),
				      git_replace_usage, options);
		return replace_object(argv[0], argv[1], force);

	case MODE_EDIT:
		if (argc != 1)
			usage_msg_opt(_("-e needs exactly one argument"),
				      git_replace_usage, options);
		return edit_and_replace(argv[0], force, raw);

	case MODE_GRAFT:
		if (argc < 1)
			usage_msg_opt(_("-g needs at least one argument"),
				      git_replace_usage, options);
		return create_graft(argc, argv, force, 0);

	case MODE_CONVERT_GRAFT_FILE:
		if (argc != 0)
			usage_msg_opt(_("--convert-graft-file takes no argument"),
				      git_replace_usage, options);
		return !!convert_graft_file(force);

	case MODE_LIST:
		if (argc > 1)
			usage_msg_opt(_("only one pattern can be given with -l"),
				      git_replace_usage, options);
		return list_replace_refs(argv[0], format);

	default:
		BUG("invalid cmdmode %d", (int)cmdmode);
	}
}
debug log:

solving affcdfb416 ...
found affcdfb416 in https://80x24.org/mirrors/git.git

git@vger.kernel.org list mirror (unofficial, one of many)

Archives are clonable:
	git clone --mirror https://public-inbox.org/git
	git clone --mirror http://ou63pmih66umazou.onion/git
	git clone --mirror http://czquwvybam4bgbro.onion/git
	git clone --mirror http://hjrcffqmbrq6wope.onion/git

Newsgroups are available over NNTP:
	nntp://news.public-inbox.org/inbox.comp.version-control.git
	nntp://ou63pmih66umazou.onion/inbox.comp.version-control.git
	nntp://czquwvybam4bgbro.onion/inbox.comp.version-control.git
	nntp://hjrcffqmbrq6wope.onion/inbox.comp.version-control.git
	nntp://news.gmane.org/gmane.comp.version-control.git

 note: .onion URLs require Tor: https://www.torproject.org/

AGPL code for this site: git clone https://public-inbox.org/ public-inbox