summaryrefslogtreecommitdiff
path: root/builtin-log.c
blob: b7e47cb5fe980374fa0d328830a524c6f6d65b66 (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
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
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
/*
 * Builtin "git log" and related commands (show, whatchanged)
 *
 * (C) Copyright 2006 Linus Torvalds
 *		 2006 Junio Hamano
 */
#include "cache.h"
#include "commit.h"
#include "diff.h"
#include "revision.h"
#include "log-tree.h"
#include "builtin.h"
#include "tag.h"
 
static int default_show_root = 1;
 
/* this is in builtin-diff.c */
void add_head(struct rev_info *revs);
 
static void cmd_log_init(int argc, const char **argv, const char *prefix,
		      struct rev_info *rev)
{
	int i;
 
	rev->abbrev = DEFAULT_ABBREV;
	rev->commit_format = CMIT_FMT_DEFAULT;
	rev->verbose_header = 1;
	rev->show_root_diff = default_show_root;
	argc = setup_revisions(argc, argv, rev, "HEAD");
	if (rev->diffopt.pickaxe || rev->diffopt.filter)
		rev->always_show_header = 0;
	for (i = 1; i < argc; i++) {
		const char *arg = argv[i];
		if (!strncmp(arg, "--encoding=", 11)) {
			arg += 11;
			if (MAX_ENCODING_LENGTH <= strlen(arg))
				die(" Value of output encoding '%s' too long",
				    arg);
			if (strcmp(arg, "none"))
				strcpy(git_commit_encoding, arg);
			else
				git_commit_encoding[0] = 0;
		}
		else
			die("unrecognized argument: %s", arg);
	}
}
 
static int cmd_log_walk(struct rev_info *rev)
{
	struct commit *commit;
 
	prepare_revision_walk(rev);
	while ((commit = get_revision(rev)) != NULL) {
		log_tree_commit(rev, commit);
		free(commit->buffer);
		commit->buffer = NULL;
		free_commit_list(commit->parents);
		commit->parents = NULL;
	}
	return 0;
}
 
static int git_log_config(const char *var, const char *value)
{
	if (!strcmp(var, "log.showroot")) {
		default_show_root = git_config_bool(var, value);
		return 0;
	}
	return git_diff_ui_config(var, value);
}
 
int cmd_whatchanged(int argc, const char **argv, const char *prefix)
{
	struct rev_info rev;
 
	git_config(git_log_config);
	init_revisions(&rev, prefix);
	rev.diff = 1;
	rev.diffopt.recursive = 1;
	rev.simplify_history = 0;
	cmd_log_init(argc, argv, prefix, &rev);
	if (!rev.diffopt.output_format)
		rev.diffopt.output_format = DIFF_FORMAT_RAW;
	return cmd_log_walk(&rev);
}
 
static int show_object(const unsigned char *sha1, int suppress_header)
{
	unsigned long size;
	char type[20];
	char *buf = read_sha1_file(sha1, type, &size);
	int offset = 0;
 
	if (!buf)
		return error("Could not read object %s", sha1_to_hex(sha1));
 
	if (suppress_header)
		while (offset < size && buf[offset++] != '\n') {
			int new_offset = offset;
			while (new_offset < size && buf[new_offset++] != '\n')
				; /* do nothing */
			offset = new_offset;
		}
 
	if (offset < size)
		fwrite(buf + offset, size - offset, 1, stdout);
	free(buf);
	return 0;
}
 
static int show_tree_object(const unsigned char *sha1,
		const char *base, int baselen,
		const char *pathname, unsigned mode, int stage)
{
	printf("%s%s\n", pathname, S_ISDIR(mode) ? "/" : "");
	return 0;
}
 
int cmd_show(int argc, const char **argv, const char *prefix)
{
	struct rev_info rev;
	struct object_array_entry *objects;
	int i, count, ret = 0;
 
	git_config(git_log_config);
	init_revisions(&rev, prefix);
	rev.diff = 1;
	rev.diffopt.recursive = 1;
	rev.combine_merges = 1;
	rev.dense_combined_merges = 1;
	rev.always_show_header = 1;
	rev.ignore_merges = 0;
	rev.no_walk = 1;
	cmd_log_init(argc, argv, prefix, &rev);
 
	count = rev.pending.nr;
	objects = rev.pending.objects;
	for (i = 0; i < count && !ret; i++) {
		struct object *o = objects[i].item;
		const char *name = objects[i].name;
		switch (o->type) {
		case OBJ_BLOB:
			ret = show_object(o->sha1, 0);
			break;
		case OBJ_TAG: {
			struct tag *t = (struct tag *)o;
 
			printf("%stag %s%s\n\n",
					diff_get_color(rev.diffopt.color_diff,
						DIFF_COMMIT),
					t->tag,
					diff_get_color(rev.diffopt.color_diff,
						DIFF_RESET));
			ret = show_object(o->sha1, 1);
			objects[i].item = (struct object *)t->tagged;
			i--;
			break;
		}
		case OBJ_TREE:
			printf("%stree %s%s\n\n",
					diff_get_color(rev.diffopt.color_diff,
						DIFF_COMMIT),
					name,
					diff_get_color(rev.diffopt.color_diff,
						DIFF_RESET));
			read_tree_recursive((struct tree *)o, "", 0, 0, NULL,
					show_tree_object);
			break;
		case OBJ_COMMIT:
			rev.pending.nr = rev.pending.alloc = 0;
			rev.pending.objects = NULL;
			add_object_array(o, name, &rev.pending);
			ret = cmd_log_walk(&rev);
			break;
		default:
			ret = error("Unknown type: %d", o->type);
		}
	}
	free(objects);
	return ret;
}
 
int cmd_log(int argc, const char **argv, const char *prefix)
{
	struct rev_info rev;
 
	git_config(git_log_config);
	init_revisions(&rev, prefix);
	rev.always_show_header = 1;
	cmd_log_init(argc, argv, prefix, &rev);
	return cmd_log_walk(&rev);
}
 
static int istitlechar(char c)
{
	return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') ||
		(c >= '0' && c <= '9') || c == '.' || c == '_';
}
 
static char *extra_headers = NULL;
static int extra_headers_size = 0;
 
static int git_format_config(const char *var, const char *value)
{
	if (!strcmp(var, "format.headers")) {
		int len = strlen(value);
		extra_headers_size += len + 1;
		extra_headers = xrealloc(extra_headers, extra_headers_size);
		extra_headers[extra_headers_size - len - 1] = 0;
		strcat(extra_headers, value);
		return 0;
	}
	if (!strcmp(var, "diff.color") || !strcmp(var, "color.diff")) {
		return 0;
	}
	return git_log_config(var, value);
}
 
 
static FILE *realstdout = NULL;
static const char *output_directory = NULL;
 
static void reopen_stdout(struct commit *commit, int nr, int keep_subject)
{
	char filename[1024];
	char *sol;
	int len = 0;
 
	if (output_directory) {
		strlcpy(filename, output_directory, 1010);
		len = strlen(filename);
		if (filename[len - 1] != '/')
			filename[len++] = '/';
	}
 
	sprintf(filename + len, "%04d", nr);
	len = strlen(filename);
 
	sol = strstr(commit->buffer, "\n\n");
	if (sol) {
		int j, space = 1;
 
		sol += 2;
		/* strip [PATCH] or [PATCH blabla] */
		if (!keep_subject && !strncmp(sol, "[PATCH", 6)) {
			char *eos = strchr(sol + 6, ']');
			if (eos) {
				while (isspace(*eos))
					eos++;
				sol = eos;
			}
		}
 
		for (j = 0; len < 1024 - 6 && sol[j] && sol[j] != '\n'; j++) {
			if (istitlechar(sol[j])) {
				if (space) {
					filename[len++] = '-';
					space = 0;
				}
				filename[len++] = sol[j];
				if (sol[j] == '.')
					while (sol[j + 1] == '.')
						j++;
			} else
				space = 1;
		}
		while (filename[len - 1] == '.' || filename[len - 1] == '-')
			len--;
	}
	strcpy(filename + len, ".txt");
	fprintf(realstdout, "%s\n", filename);
	freopen(filename, "w", stdout);
}
 
static int get_patch_id(struct commit *commit, struct diff_options *options,
		unsigned char *sha1)
{
	if (commit->parents)
		diff_tree_sha1(commit->parents->item->object.sha1,
		               commit->object.sha1, "", options);
	else
		diff_root_tree_sha1(commit->object.sha1, "", options);
	diffcore_std(options);
	return diff_flush_patch_id(options, sha1);
}
 
static void get_patch_ids(struct rev_info *rev, struct diff_options *options, const char *prefix)
{
	struct rev_info check_rev;
	struct commit *commit;
	struct object *o1, *o2;
	unsigned flags1, flags2;
	unsigned char sha1[20];
 
	if (rev->pending.nr != 2)
		die("Need exactly one range.");
 
	o1 = rev->pending.objects[0].item;
	flags1 = o1->flags;
	o2 = rev->pending.objects[1].item;
	flags2 = o2->flags;
 
	if ((flags1 & UNINTERESTING) == (flags2 & UNINTERESTING))
		die("Not a range.");
 
	diff_setup(options);
	options->recursive = 1;
	if (diff_setup_done(options) < 0)
		die("diff_setup_done failed");
 
	/* given a range a..b get all patch ids for b..a */
	init_revisions(&check_rev, prefix);
	o1->flags ^= UNINTERESTING;
	o2->flags ^= UNINTERESTING;
	add_pending_object(&check_rev, o1, "o1");
	add_pending_object(&check_rev, o2, "o2");
	prepare_revision_walk(&check_rev);
 
	while ((commit = get_revision(&check_rev)) != NULL) {
		/* ignore merges */
		if (commit->parents && commit->parents->next)
			continue;
 
		if (!get_patch_id(commit, options, sha1))
			created_object(sha1, xcalloc(1, sizeof(struct object)));
	}
 
	/* reset for next revision walk */
	clear_commit_marks((struct commit *)o1,
			SEEN | UNINTERESTING | SHOWN | ADDED);
	clear_commit_marks((struct commit *)o2,
			SEEN | UNINTERESTING | SHOWN | ADDED);
	o1->flags = flags1;
	o2->flags = flags2;
}
 
static void gen_message_id(char *dest, unsigned int length, char *base)
{
	const char *committer = git_committer_info(1);
	const char *email_start = strrchr(committer, '<');
	const char *email_end = strrchr(committer, '>');
	if(!email_start || !email_end || email_start > email_end - 1)
		die("Could not extract email from committer identity.");
	snprintf(dest, length, "%s.%lu.git.%.*s", base,
		 (unsigned long) time(NULL),
		 (int)(email_end - email_start - 1), email_start + 1);
}
 
int cmd_format_patch(int argc, const char **argv, const char *prefix)
{
	struct commit *commit;
	struct commit **list = NULL;
	struct rev_info rev;
	int nr = 0, total, i, j;
	int use_stdout = 0;
	int numbered = 0;
	int start_number = -1;
	int keep_subject = 0;
	int ignore_if_in_upstream = 0;
	int thread = 0;
	const char *in_reply_to = NULL;
	struct diff_options patch_id_opts;
	char *add_signoff = NULL;
	char message_id[1024];
	char ref_message_id[1024];
 
	setup_ident();
	git_config(git_format_config);
	init_revisions(&rev, prefix);
	rev.commit_format = CMIT_FMT_EMAIL;
	rev.verbose_header = 1;
	rev.diff = 1;
	rev.combine_merges = 0;
	rev.ignore_merges = 1;
	rev.diffopt.msg_sep = "";
	rev.diffopt.recursive = 1;
 
	rev.extra_headers = extra_headers;
 
	/*
	 * Parse the arguments before setup_revisions(), or something
	 * like "git fmt-patch -o a123 HEAD^.." may fail; a123 is
	 * possibly a valid SHA1.
	 */
	for (i = 1, j = 1; i < argc; i++) {
		if (!strcmp(argv[i], "--stdout"))
			use_stdout = 1;
		else if (!strcmp(argv[i], "-n") ||
				!strcmp(argv[i], "--numbered"))
			numbered = 1;
		else if (!strncmp(argv[i], "--start-number=", 15))
			start_number = strtol(argv[i] + 15, NULL, 10);
		else if (!strcmp(argv[i], "--start-number")) {
			i++;
			if (i == argc)
				die("Need a number for --start-number");
			start_number = strtol(argv[i], NULL, 10);
		}
		else if (!strcmp(argv[i], "-k") ||
				!strcmp(argv[i], "--keep-subject")) {
			keep_subject = 1;
			rev.total = -1;
		}
		else if (!strcmp(argv[i], "--output-directory") ||
			 !strcmp(argv[i], "-o")) {
			i++;
			if (argc <= i)
				die("Which directory?");
			if (output_directory)
				die("Two output directories?");
			output_directory = argv[i];
		}
		else if (!strcmp(argv[i], "--signoff") ||
			 !strcmp(argv[i], "-s")) {
			const char *committer;
			const char *endpos;
			committer = git_committer_info(1);
			endpos = strchr(committer, '>');
			if (!endpos)
				die("bogos committer info %s\n", committer);
			add_signoff = xmalloc(endpos - committer + 2);
			memcpy(add_signoff, committer, endpos - committer + 1);
			add_signoff[endpos - committer + 1] = 0;
		}
		else if (!strcmp(argv[i], "--attach"))
			rev.mime_boundary = git_version_string;
		else if (!strncmp(argv[i], "--attach=", 9))
			rev.mime_boundary = argv[i] + 9;
		else if (!strcmp(argv[i], "--ignore-if-in-upstream"))
			ignore_if_in_upstream = 1;
		else if (!strcmp(argv[i], "--thread"))
			thread = 1;
		else if (!strncmp(argv[i], "--in-reply-to=", 14))
			in_reply_to = argv[i] + 14;
		else if (!strcmp(argv[i], "--in-reply-to")) {
			i++;
			if (i == argc)
				die("Need a Message-Id for --in-reply-to");
			in_reply_to = argv[i];
		}
		else
			argv[j++] = argv[i];
	}
	argc = j;
 
	if (start_number < 0)
		start_number = 1;
	if (numbered && keep_subject)
		die ("-n and -k are mutually exclusive.");
 
	argc = setup_revisions(argc, argv, &rev, "HEAD");
	if (argc > 1)
		die ("unrecognized argument: %s", argv[1]);
 
	if (!rev.diffopt.output_format)
		rev.diffopt.output_format = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH;
 
	if (!output_directory)
		output_directory = prefix;
 
	if (output_directory) {
		if (use_stdout)
			die("standard output, or directory, which one?");
		if (mkdir(output_directory, 0777) < 0 && errno != EEXIST)
			die("Could not create directory %s",
			    output_directory);
	}
 
	if (rev.pending.nr == 1) {
		rev.pending.objects[0].item->flags |= UNINTERESTING;
		add_head(&rev);
	}
 
	if (ignore_if_in_upstream)
		get_patch_ids(&rev, &patch_id_opts, prefix);
 
	if (!use_stdout)
		realstdout = fdopen(dup(1), "w");
 
	prepare_revision_walk(&rev);
	while ((commit = get_revision(&rev)) != NULL) {
		unsigned char sha1[20];
 
		/* ignore merges */
		if (commit->parents && commit->parents->next)
			continue;
 
		if (ignore_if_in_upstream &&
				!get_patch_id(commit, &patch_id_opts, sha1) &&
				lookup_object(sha1))
			continue;
 
		nr++;
		list = xrealloc(list, nr * sizeof(list[0]));
		list[nr - 1] = commit;
	}
	total = nr;
	if (numbered)
		rev.total = total + start_number - 1;
	rev.add_signoff = add_signoff;
	rev.ref_message_id = in_reply_to;
	while (0 <= --nr) {
		int shown;
		commit = list[nr];
		rev.nr = total - nr + (start_number - 1);
		/* Make the second and subsequent mails replies to the first */
		if (thread) {
			if (nr == (total - 2)) {
				strncpy(ref_message_id, message_id,
					sizeof(ref_message_id));
				ref_message_id[sizeof(ref_message_id)-1]='\0';
				rev.ref_message_id = ref_message_id;
			}
			gen_message_id(message_id, sizeof(message_id),
				       sha1_to_hex(commit->object.sha1));
			rev.message_id = message_id;
		}
		if (!use_stdout)
			reopen_stdout(commit, rev.nr, keep_subject);
		shown = log_tree_commit(&rev, commit);
		free(commit->buffer);
		commit->buffer = NULL;
 
		/* We put one extra blank line between formatted
		 * patches and this flag is used by log-tree code
		 * to see if it needs to emit a LF before showing
		 * the log; when using one file per patch, we do
		 * not want the extra blank line.
		 */
		if (!use_stdout)
			rev.shown_one = 0;
		if (shown) {
			if (rev.mime_boundary)
				printf("\n--%s%s--\n\n\n",
				       mime_boundary_leader,
				       rev.mime_boundary);
			else
				printf("-- \n%s\n\n", git_version_string);
		}
		if (!use_stdout)
			fclose(stdout);
	}
	free(list);
	return 0;
}
 
static int add_pending_commit(const char *arg, struct rev_info *revs, int flags)
{
	unsigned char sha1[20];
	if (get_sha1(arg, sha1) == 0) {
		struct commit *commit = lookup_commit_reference(sha1);
		if (commit) {
			commit->object.flags |= flags;
			add_pending_object(revs, &commit->object, arg);
			return 0;
		}
	}
	return -1;
}
 
static const char cherry_usage[] =
"git-cherry [-v] <upstream> [<head>] [<limit>]";
int cmd_cherry(int argc, const char **argv, const char *prefix)
{
	struct rev_info revs;
	struct diff_options patch_id_opts;
	struct commit *commit;
	struct commit_list *list = NULL;
	const char *upstream;
	const char *head = "HEAD";
	const char *limit = NULL;
	int verbose = 0;
 
	if (argc > 1 && !strcmp(argv[1], "-v")) {
		verbose = 1;
		argc--;
		argv++;
	}
 
	switch (argc) {
	case 4:
		limit = argv[3];
		/* FALLTHROUGH */
	case 3:
		head = argv[2];
		/* FALLTHROUGH */
	case 2:
		upstream = argv[1];
		break;
	default:
		usage(cherry_usage);
	}
 
	init_revisions(&revs, prefix);
	revs.diff = 1;
	revs.combine_merges = 0;
	revs.ignore_merges = 1;
	revs.diffopt.recursive = 1;
 
	if (add_pending_commit(head, &revs, 0))
		die("Unknown commit %s", head);
	if (add_pending_commit(upstream, &revs, UNINTERESTING))
		die("Unknown commit %s", upstream);
 
	/* Don't say anything if head and upstream are the same. */
	if (revs.pending.nr == 2) {
		struct object_array_entry *o = revs.pending.objects;
		if (hashcmp(o[0].item->sha1, o[1].item->sha1) == 0)
			return 0;
	}
 
	get_patch_ids(&revs, &patch_id_opts, prefix);
 
	if (limit && add_pending_commit(limit, &revs, UNINTERESTING))
		die("Unknown commit %s", limit);
 
	/* reverse the list of commits */
	prepare_revision_walk(&revs);
	while ((commit = get_revision(&revs)) != NULL) {
		/* ignore merges */
		if (commit->parents && commit->parents->next)
			continue;
 
		commit_list_insert(commit, &list);
	}
 
	while (list) {
		unsigned char sha1[20];
		char sign = '+';
 
		commit = list->item;
		if (!get_patch_id(commit, &patch_id_opts, sha1) &&
		    lookup_object(sha1))
			sign = '-';
 
		if (verbose) {
			static char buf[16384];
			pretty_print_commit(CMIT_FMT_ONELINE, commit, ~0,
			                    buf, sizeof(buf), 0, NULL, NULL, 0);
			printf("%c %s %s\n", sign,
			       sha1_to_hex(commit->object.sha1), buf);
		}
		else {
			printf("%c %s\n", sign,
			       sha1_to_hex(commit->object.sha1));
		}
 
		list = list->next;
	}
 
	return 0;
}