Merge branch 'jc/grep'
[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                 output_directory = prefix;
353
354         if (output_directory) {
355                 if (use_stdout)
356                         die("standard output, or directory, which one?");
357                 if (mkdir(output_directory, 0777) < 0 && errno != EEXIST)
358                         die("Could not create directory %s",
359                             output_directory);
360         }
361
362         if (rev.pending.nr == 1) {
363                 rev.pending.objects[0].item->flags |= UNINTERESTING;
364                 add_head(&rev);
365         }
366
367         if (ignore_if_in_upstream)
368                 get_patch_ids(&rev, &patch_id_opts, prefix);
369
370         if (!use_stdout)
371                 realstdout = fdopen(dup(1), "w");
372
373         prepare_revision_walk(&rev);
374         while ((commit = get_revision(&rev)) != NULL) {
375                 unsigned char sha1[20];
376
377                 /* ignore merges */
378                 if (commit->parents && commit->parents->next)
379                         continue;
380
381                 if (ignore_if_in_upstream &&
382                                 !get_patch_id(commit, &patch_id_opts, sha1) &&
383                                 lookup_object(sha1))
384                         continue;
385
386                 nr++;
387                 list = xrealloc(list, nr * sizeof(list[0]));
388                 list[nr - 1] = commit;
389         }
390         total = nr;
391         if (numbered)
392                 rev.total = total + start_number - 1;
393         rev.add_signoff = add_signoff;
394         rev.ref_message_id = in_reply_to;
395         while (0 <= --nr) {
396                 int shown;
397                 commit = list[nr];
398                 rev.nr = total - nr + (start_number - 1);
399                 /* Make the second and subsequent mails replies to the first */
400                 if (thread) {
401                         if (nr == (total - 2)) {
402                                 strncpy(ref_message_id, message_id,
403                                         sizeof(ref_message_id));
404                                 ref_message_id[sizeof(ref_message_id)-1]='\0';
405                                 rev.ref_message_id = ref_message_id;
406                         }
407                         gen_message_id(message_id, sizeof(message_id),
408                                        sha1_to_hex(commit->object.sha1));
409                         rev.message_id = message_id;
410                 }
411                 if (!use_stdout)
412                         reopen_stdout(commit, rev.nr, keep_subject);
413                 shown = log_tree_commit(&rev, commit);
414                 free(commit->buffer);
415                 commit->buffer = NULL;
416
417                 /* We put one extra blank line between formatted
418                  * patches and this flag is used by log-tree code
419                  * to see if it needs to emit a LF before showing
420                  * the log; when using one file per patch, we do
421                  * not want the extra blank line.
422                  */
423                 if (!use_stdout)
424                         rev.shown_one = 0;
425                 if (shown) {
426                         if (rev.mime_boundary)
427                                 printf("\n--%s%s--\n\n\n",
428                                        mime_boundary_leader,
429                                        rev.mime_boundary);
430                         else
431                                 printf("-- \n%s\n\n", git_version_string);
432                 }
433                 if (!use_stdout)
434                         fclose(stdout);
435         }
436         free(list);
437         return 0;
438 }
439