Use xrealloc instead of realloc
[git/git.git] / builtin-log.c
1 /*
2 * Builtin "git log" and related commands (show, whatchanged)
3 *
4 * (C) Copyright 2006 Linus Torvalds
5 * 2006 Junio Hamano
6 */
7 #include "cache.h"
8 #include "commit.h"
9 #include "diff.h"
10 #include "revision.h"
11 #include "log-tree.h"
12 #include "builtin.h"
13 #include <time.h>
14 #include <sys/time.h>
15
16 /* this is in builtin-diff.c */
17 void add_head(struct rev_info *revs);
18
19 static void cmd_log_init(int argc, const char **argv, const char *prefix,
20 struct rev_info *rev)
21 {
22 rev->abbrev = DEFAULT_ABBREV;
23 rev->commit_format = CMIT_FMT_DEFAULT;
24 rev->verbose_header = 1;
25 argc = setup_revisions(argc, argv, rev, "HEAD");
26 if (rev->diffopt.pickaxe || rev->diffopt.filter)
27 rev->always_show_header = 0;
28 if (argc > 1)
29 die("unrecognized argument: %s", argv[1]);
30 }
31
32 static int cmd_log_walk(struct rev_info *rev)
33 {
34 struct commit *commit;
35
36 prepare_revision_walk(rev);
37 while ((commit = get_revision(rev)) != NULL) {
38 log_tree_commit(rev, commit);
39 free(commit->buffer);
40 commit->buffer = NULL;
41 free_commit_list(commit->parents);
42 commit->parents = NULL;
43 }
44 return 0;
45 }
46
47 int cmd_whatchanged(int argc, const char **argv, const char *prefix)
48 {
49 struct rev_info rev;
50
51 git_config(git_diff_ui_config);
52 init_revisions(&rev, prefix);
53 rev.diff = 1;
54 rev.diffopt.recursive = 1;
55 rev.simplify_history = 0;
56 cmd_log_init(argc, argv, prefix, &rev);
57 if (!rev.diffopt.output_format)
58 rev.diffopt.output_format = DIFF_FORMAT_RAW;
59 return cmd_log_walk(&rev);
60 }
61
62 int cmd_show(int argc, const char **argv, const char *prefix)
63 {
64 struct rev_info rev;
65
66 git_config(git_diff_ui_config);
67 init_revisions(&rev, prefix);
68 rev.diff = 1;
69 rev.diffopt.recursive = 1;
70 rev.combine_merges = 1;
71 rev.dense_combined_merges = 1;
72 rev.always_show_header = 1;
73 rev.ignore_merges = 0;
74 rev.no_walk = 1;
75 cmd_log_init(argc, argv, prefix, &rev);
76 return cmd_log_walk(&rev);
77 }
78
79 int cmd_log(int argc, const char **argv, const char *prefix)
80 {
81 struct rev_info rev;
82
83 git_config(git_diff_ui_config);
84 init_revisions(&rev, prefix);
85 rev.always_show_header = 1;
86 cmd_log_init(argc, argv, prefix, &rev);
87 return cmd_log_walk(&rev);
88 }
89
90 static int istitlechar(char c)
91 {
92 return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') ||
93 (c >= '0' && c <= '9') || c == '.' || c == '_';
94 }
95
96 static char *extra_headers = NULL;
97 static int extra_headers_size = 0;
98
99 static int git_format_config(const char *var, const char *value)
100 {
101 if (!strcmp(var, "format.headers")) {
102 int len = strlen(value);
103 extra_headers_size += len + 1;
104 extra_headers = xrealloc(extra_headers, extra_headers_size);
105 extra_headers[extra_headers_size - len - 1] = 0;
106 strcat(extra_headers, value);
107 return 0;
108 }
109 if (!strcmp(var, "diff.color")) {
110 return 0;
111 }
112 return git_diff_ui_config(var, value);
113 }
114
115
116 static FILE *realstdout = NULL;
117 static const char *output_directory = NULL;
118
119 static void reopen_stdout(struct commit *commit, int nr, int keep_subject)
120 {
121 char filename[1024];
122 char *sol;
123 int len = 0;
124
125 if (output_directory) {
126 strlcpy(filename, output_directory, 1010);
127 len = strlen(filename);
128 if (filename[len - 1] != '/')
129 filename[len++] = '/';
130 }
131
132 sprintf(filename + len, "%04d", nr);
133 len = strlen(filename);
134
135 sol = strstr(commit->buffer, "\n\n");
136 if (sol) {
137 int j, space = 1;
138
139 sol += 2;
140 /* strip [PATCH] or [PATCH blabla] */
141 if (!keep_subject && !strncmp(sol, "[PATCH", 6)) {
142 char *eos = strchr(sol + 6, ']');
143 if (eos) {
144 while (isspace(*eos))
145 eos++;
146 sol = eos;
147 }
148 }
149
150 for (j = 0; len < 1024 - 6 && sol[j] && sol[j] != '\n'; j++) {
151 if (istitlechar(sol[j])) {
152 if (space) {
153 filename[len++] = '-';
154 space = 0;
155 }
156 filename[len++] = sol[j];
157 if (sol[j] == '.')
158 while (sol[j + 1] == '.')
159 j++;
160 } else
161 space = 1;
162 }
163 while (filename[len - 1] == '.' || filename[len - 1] == '-')
164 len--;
165 }
166 strcpy(filename + len, ".txt");
167 fprintf(realstdout, "%s\n", filename);
168 freopen(filename, "w", stdout);
169 }
170
171 static int get_patch_id(struct commit *commit, struct diff_options *options,
172 unsigned char *sha1)
173 {
174 diff_tree_sha1(commit->parents->item->object.sha1, commit->object.sha1,
175 "", options);
176 diffcore_std(options);
177 return diff_flush_patch_id(options, sha1);
178 }
179
180 static void get_patch_ids(struct rev_info *rev, struct diff_options *options, const char *prefix)
181 {
182 struct rev_info check_rev;
183 struct commit *commit;
184 struct object *o1, *o2;
185 unsigned flags1, flags2;
186 unsigned char sha1[20];
187
188 if (rev->pending.nr != 2)
189 die("Need exactly one range.");
190
191 o1 = rev->pending.objects[0].item;
192 flags1 = o1->flags;
193 o2 = rev->pending.objects[1].item;
194 flags2 = o2->flags;
195
196 if ((flags1 & UNINTERESTING) == (flags2 & UNINTERESTING))
197 die("Not a range.");
198
199 diff_setup(options);
200 options->recursive = 1;
201 if (diff_setup_done(options) < 0)
202 die("diff_setup_done failed");
203
204 /* given a range a..b get all patch ids for b..a */
205 init_revisions(&check_rev, prefix);
206 o1->flags ^= UNINTERESTING;
207 o2->flags ^= UNINTERESTING;
208 add_pending_object(&check_rev, o1, "o1");
209 add_pending_object(&check_rev, o2, "o2");
210 prepare_revision_walk(&check_rev);
211
212 while ((commit = get_revision(&check_rev)) != NULL) {
213 /* ignore merges */
214 if (commit->parents && commit->parents->next)
215 continue;
216
217 if (!get_patch_id(commit, options, sha1))
218 created_object(sha1, xcalloc(1, sizeof(struct object)));
219 }
220
221 /* reset for next revision walk */
222 clear_commit_marks((struct commit *)o1,
223 SEEN | UNINTERESTING | SHOWN | ADDED);
224 clear_commit_marks((struct commit *)o2,
225 SEEN | UNINTERESTING | SHOWN | ADDED);
226 o1->flags = flags1;
227 o2->flags = flags2;
228 }
229
230 static void gen_message_id(char *dest, unsigned int length, char *base)
231 {
232 const char *committer = git_committer_info(1);
233 const char *email_start = strrchr(committer, '<');
234 const char *email_end = strrchr(committer, '>');
235 if(!email_start || !email_end || email_start > email_end - 1)
236 die("Could not extract email from committer identity.");
237 snprintf(dest, length, "%s.%lu.git.%.*s", base,
238 (unsigned long) time(NULL),
239 (int)(email_end - email_start - 1), email_start + 1);
240 }
241
242 int cmd_format_patch(int argc, const char **argv, const char *prefix)
243 {
244 struct commit *commit;
245 struct commit **list = NULL;
246 struct rev_info rev;
247 int nr = 0, total, i, j;
248 int use_stdout = 0;
249 int numbered = 0;
250 int start_number = -1;
251 int keep_subject = 0;
252 int ignore_if_in_upstream = 0;
253 int thread = 0;
254 const char *in_reply_to = NULL;
255 struct diff_options patch_id_opts;
256 char *add_signoff = NULL;
257 char message_id[1024];
258 char ref_message_id[1024];
259
260 setup_ident();
261 git_config(git_format_config);
262 init_revisions(&rev, prefix);
263 rev.commit_format = CMIT_FMT_EMAIL;
264 rev.verbose_header = 1;
265 rev.diff = 1;
266 rev.combine_merges = 0;
267 rev.ignore_merges = 1;
268 rev.diffopt.msg_sep = "";
269 rev.diffopt.recursive = 1;
270
271 rev.extra_headers = extra_headers;
272
273 /*
274 * Parse the arguments before setup_revisions(), or something
275 * like "git fmt-patch -o a123 HEAD^.." may fail; a123 is
276 * possibly a valid SHA1.
277 */
278 for (i = 1, j = 1; i < argc; i++) {
279 if (!strcmp(argv[i], "--stdout"))
280 use_stdout = 1;
281 else if (!strcmp(argv[i], "-n") ||
282 !strcmp(argv[i], "--numbered"))
283 numbered = 1;
284 else if (!strncmp(argv[i], "--start-number=", 15))
285 start_number = strtol(argv[i] + 15, NULL, 10);
286 else if (!strcmp(argv[i], "--start-number")) {
287 i++;
288 if (i == argc)
289 die("Need a number for --start-number");
290 start_number = strtol(argv[i], NULL, 10);
291 }
292 else if (!strcmp(argv[i], "-k") ||
293 !strcmp(argv[i], "--keep-subject")) {
294 keep_subject = 1;
295 rev.total = -1;
296 }
297 else if (!strcmp(argv[i], "--output-directory") ||
298 !strcmp(argv[i], "-o")) {
299 i++;
300 if (argc <= i)
301 die("Which directory?");
302 if (output_directory)
303 die("Two output directories?");
304 output_directory = argv[i];
305 }
306 else if (!strcmp(argv[i], "--signoff") ||
307 !strcmp(argv[i], "-s")) {
308 const char *committer;
309 const char *endpos;
310 committer = git_committer_info(1);
311 endpos = strchr(committer, '>');
312 if (!endpos)
313 die("bogos committer info %s\n", committer);
314 add_signoff = xmalloc(endpos - committer + 2);
315 memcpy(add_signoff, committer, endpos - committer + 1);
316 add_signoff[endpos - committer + 1] = 0;
317 }
318 else if (!strcmp(argv[i], "--attach"))
319 rev.mime_boundary = git_version_string;
320 else if (!strncmp(argv[i], "--attach=", 9))
321 rev.mime_boundary = argv[i] + 9;
322 else if (!strcmp(argv[i], "--ignore-if-in-upstream"))
323 ignore_if_in_upstream = 1;
324 else if (!strcmp(argv[i], "--thread"))
325 thread = 1;
326 else if (!strncmp(argv[i], "--in-reply-to=", 14))
327 in_reply_to = argv[i] + 14;
328 else if (!strcmp(argv[i], "--in-reply-to")) {
329 i++;
330 if (i == argc)
331 die("Need a Message-Id for --in-reply-to");
332 in_reply_to = argv[i];
333 }
334 else
335 argv[j++] = argv[i];
336 }
337 argc = j;
338
339 if (start_number < 0)
340 start_number = 1;
341 if (numbered && keep_subject)
342 die ("-n and -k are mutually exclusive.");
343
344 argc = setup_revisions(argc, argv, &rev, "HEAD");
345 if (argc > 1)
346 die ("unrecognized argument: %s", argv[1]);
347
348 if (!rev.diffopt.output_format)
349 rev.diffopt.output_format = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH;
350
351 if (output_directory) {
352 if (use_stdout)
353 die("standard output, or directory, which one?");
354 if (mkdir(output_directory, 0777) < 0 && errno != EEXIST)
355 die("Could not create directory %s",
356 output_directory);
357 }
358
359 if (rev.pending.nr == 1) {
360 rev.pending.objects[0].item->flags |= UNINTERESTING;
361 add_head(&rev);
362 }
363
364 if (ignore_if_in_upstream)
365 get_patch_ids(&rev, &patch_id_opts, prefix);
366
367 if (!use_stdout)
368 realstdout = fdopen(dup(1), "w");
369
370 prepare_revision_walk(&rev);
371 while ((commit = get_revision(&rev)) != NULL) {
372 unsigned char sha1[20];
373
374 /* ignore merges */
375 if (commit->parents && commit->parents->next)
376 continue;
377
378 if (ignore_if_in_upstream &&
379 !get_patch_id(commit, &patch_id_opts, sha1) &&
380 lookup_object(sha1))
381 continue;
382
383 nr++;
384 list = xrealloc(list, nr * sizeof(list[0]));
385 list[nr - 1] = commit;
386 }
387 total = nr;
388 if (numbered)
389 rev.total = total + start_number - 1;
390 rev.add_signoff = add_signoff;
391 rev.ref_message_id = in_reply_to;
392 while (0 <= --nr) {
393 int shown;
394 commit = list[nr];
395 rev.nr = total - nr + (start_number - 1);
396 /* Make the second and subsequent mails replies to the first */
397 if (thread) {
398 if (nr == (total - 2)) {
399 strncpy(ref_message_id, message_id,
400 sizeof(ref_message_id));
401 ref_message_id[sizeof(ref_message_id)-1]='\0';
402 rev.ref_message_id = ref_message_id;
403 }
404 gen_message_id(message_id, sizeof(message_id),
405 sha1_to_hex(commit->object.sha1));
406 rev.message_id = message_id;
407 }
408 if (!use_stdout)
409 reopen_stdout(commit, rev.nr, keep_subject);
410 shown = log_tree_commit(&rev, commit);
411 free(commit->buffer);
412 commit->buffer = NULL;
413
414 /* We put one extra blank line between formatted
415 * patches and this flag is used by log-tree code
416 * to see if it needs to emit a LF before showing
417 * the log; when using one file per patch, we do
418 * not want the extra blank line.
419 */
420 if (!use_stdout)
421 rev.shown_one = 0;
422 if (shown) {
423 if (rev.mime_boundary)
424 printf("\n--%s%s--\n\n\n",
425 mime_boundary_leader,
426 rev.mime_boundary);
427 else
428 printf("-- \n%s\n\n", git_version_string);
429 }
430 if (!use_stdout)
431 fclose(stdout);
432 }
433 free(list);
434 return 0;
435 }
436