Windows: boost startup by avoiding a static dependency on shell32.dll
[git/dscho.git] / log-tree.c
blob0fdf159f8098532e3ed77251d36e163b695310ba
1 #include "cache.h"
2 #include "diff.h"
3 #include "commit.h"
4 #include "tag.h"
5 #include "graph.h"
6 #include "log-tree.h"
7 #include "reflog-walk.h"
8 #include "refs.h"
9 #include "string-list.h"
11 struct decoration name_decoration = { "object names" };
13 static void add_name_decoration(const char *prefix, const char *name, struct object *obj)
15         int plen = strlen(prefix);
16         int nlen = strlen(name);
17         struct name_decoration *res = xmalloc(sizeof(struct name_decoration) + plen + nlen);
18         memcpy(res->name, prefix, plen);
19         memcpy(res->name + plen, name, nlen + 1);
20         res->next = add_decoration(&name_decoration, obj, res);
23 static int add_ref_decoration(const char *refname, const unsigned char *sha1, int flags, void *cb_data)
25         struct object *obj = parse_object(sha1);
26         if (!obj)
27                 return 0;
28         if (!cb_data || *(int *)cb_data == DECORATE_SHORT_REFS)
29                 refname = prettify_refname(refname);
30         add_name_decoration("", refname, obj);
31         while (obj->type == OBJ_TAG) {
32                 obj = ((struct tag *)obj)->tagged;
33                 if (!obj)
34                         break;
35                 add_name_decoration("tag: ", refname, obj);
36         }
37         return 0;
40 void load_ref_decorations(int flags)
42         static int loaded;
43         if (!loaded) {
44                 loaded = 1;
45                 for_each_ref(add_ref_decoration, &flags);
46                 head_ref(add_ref_decoration, &flags);
47         }
50 static void show_parents(struct commit *commit, int abbrev)
52         struct commit_list *p;
53         for (p = commit->parents; p ; p = p->next) {
54                 struct commit *parent = p->item;
55                 printf(" %s", find_unique_abbrev(parent->object.sha1, abbrev));
56         }
59 void show_decorations(struct rev_info *opt, struct commit *commit)
61         const char *prefix;
62         struct name_decoration *decoration;
64         if (opt->show_source && commit->util)
65                 printf("\t%s", (char *) commit->util);
66         if (!opt->show_decorations)
67                 return;
68         decoration = lookup_decoration(&name_decoration, &commit->object);
69         if (!decoration)
70                 return;
71         prefix = " (";
72         while (decoration) {
73                 printf("%s%s", prefix, decoration->name);
74                 prefix = ", ";
75                 decoration = decoration->next;
76         }
77         putchar(')');
81  * Search for "^[-A-Za-z]+: [^@]+@" pattern. It usually matches
82  * Signed-off-by: and Acked-by: lines.
83  */
84 static int detect_any_signoff(char *letter, int size)
86         char *cp;
87         int seen_colon = 0;
88         int seen_at = 0;
89         int seen_name = 0;
90         int seen_head = 0;
92         cp = letter + size;
93         while (letter <= --cp && *cp == '\n')
94                 continue;
96         while (letter <= cp) {
97                 char ch = *cp--;
98                 if (ch == '\n')
99                         break;
101                 if (!seen_at) {
102                         if (ch == '@')
103                                 seen_at = 1;
104                         continue;
105                 }
106                 if (!seen_colon) {
107                         if (ch == '@')
108                                 return 0;
109                         else if (ch == ':')
110                                 seen_colon = 1;
111                         else
112                                 seen_name = 1;
113                         continue;
114                 }
115                 if (('A' <= ch && ch <= 'Z') ||
116                     ('a' <= ch && ch <= 'z') ||
117                     ch == '-') {
118                         seen_head = 1;
119                         continue;
120                 }
121                 /* no empty last line doesn't match */
122                 return 0;
123         }
124         return seen_head && seen_name;
127 static void append_signoff(struct strbuf *sb, const char *signoff)
129         static const char signed_off_by[] = "Signed-off-by: ";
130         size_t signoff_len = strlen(signoff);
131         int has_signoff = 0;
132         char *cp;
134         cp = sb->buf;
136         /* First see if we already have the sign-off by the signer */
137         while ((cp = strstr(cp, signed_off_by))) {
139                 has_signoff = 1;
141                 cp += strlen(signed_off_by);
142                 if (cp + signoff_len >= sb->buf + sb->len)
143                         break;
144                 if (strncmp(cp, signoff, signoff_len))
145                         continue;
146                 if (!isspace(cp[signoff_len]))
147                         continue;
148                 /* we already have him */
149                 return;
150         }
152         if (!has_signoff)
153                 has_signoff = detect_any_signoff(sb->buf, sb->len);
155         if (!has_signoff)
156                 strbuf_addch(sb, '\n');
158         strbuf_addstr(sb, signed_off_by);
159         strbuf_add(sb, signoff, signoff_len);
160         strbuf_addch(sb, '\n');
163 static unsigned int digits_in_number(unsigned int number)
165         unsigned int i = 10, result = 1;
166         while (i <= number) {
167                 i *= 10;
168                 result++;
169         }
170         return result;
173 void get_patch_filename(struct commit *commit, int nr, const char *suffix,
174                         struct strbuf *buf)
176         int suffix_len = strlen(suffix) + 1;
177         int start_len = buf->len;
179         strbuf_addf(buf, commit ? "%04d-" : "%d", nr);
180         if (commit) {
181                 int max_len = start_len + FORMAT_PATCH_NAME_MAX - suffix_len;
182                 struct pretty_print_context ctx = {0};
183                 ctx.date_mode = DATE_NORMAL;
185                 format_commit_message(commit, "%f", buf, &ctx);
186                 if (max_len < buf->len)
187                         strbuf_setlen(buf, max_len);
188                 strbuf_addstr(buf, suffix);
189         }
192 void log_write_email_headers(struct rev_info *opt, struct commit *commit,
193                              const char **subject_p,
194                              const char **extra_headers_p,
195                              int *need_8bit_cte_p)
197         const char *subject = NULL;
198         const char *extra_headers = opt->extra_headers;
199         const char *name = sha1_to_hex(commit->object.sha1);
201         *need_8bit_cte_p = 0; /* unknown */
202         if (opt->total > 0) {
203                 static char buffer[64];
204                 snprintf(buffer, sizeof(buffer),
205                          "Subject: [%s %0*d/%d] ",
206                          opt->subject_prefix,
207                          digits_in_number(opt->total),
208                          opt->nr, opt->total);
209                 subject = buffer;
210         } else if (opt->total == 0 && opt->subject_prefix && *opt->subject_prefix) {
211                 static char buffer[256];
212                 snprintf(buffer, sizeof(buffer),
213                          "Subject: [%s] ",
214                          opt->subject_prefix);
215                 subject = buffer;
216         } else {
217                 subject = "Subject: ";
218         }
220         printf("From %s Mon Sep 17 00:00:00 2001\n", name);
221         graph_show_oneline(opt->graph);
222         if (opt->message_id) {
223                 printf("Message-Id: <%s>\n", opt->message_id);
224                 graph_show_oneline(opt->graph);
225         }
226         if (opt->ref_message_ids && opt->ref_message_ids->nr > 0) {
227                 int i, n;
228                 n = opt->ref_message_ids->nr;
229                 printf("In-Reply-To: <%s>\n", opt->ref_message_ids->items[n-1].string);
230                 for (i = 0; i < n; i++)
231                         printf("%s<%s>\n", (i > 0 ? "\t" : "References: "),
232                                opt->ref_message_ids->items[i].string);
233                 graph_show_oneline(opt->graph);
234         }
235         if (opt->mime_boundary) {
236                 static char subject_buffer[1024];
237                 static char buffer[1024];
238                 struct strbuf filename =  STRBUF_INIT;
239                 *need_8bit_cte_p = -1; /* NEVER */
240                 snprintf(subject_buffer, sizeof(subject_buffer) - 1,
241                          "%s"
242                          "MIME-Version: 1.0\n"
243                          "Content-Type: multipart/mixed;"
244                          " boundary=\"%s%s\"\n"
245                          "\n"
246                          "This is a multi-part message in MIME "
247                          "format.\n"
248                          "--%s%s\n"
249                          "Content-Type: text/plain; "
250                          "charset=UTF-8; format=fixed\n"
251                          "Content-Transfer-Encoding: 8bit\n\n",
252                          extra_headers ? extra_headers : "",
253                          mime_boundary_leader, opt->mime_boundary,
254                          mime_boundary_leader, opt->mime_boundary);
255                 extra_headers = subject_buffer;
257                 get_patch_filename(opt->numbered_files ? NULL : commit, opt->nr,
258                                     opt->patch_suffix, &filename);
259                 snprintf(buffer, sizeof(buffer) - 1,
260                          "\n--%s%s\n"
261                          "Content-Type: text/x-patch;"
262                          " name=\"%s\"\n"
263                          "Content-Transfer-Encoding: 8bit\n"
264                          "Content-Disposition: %s;"
265                          " filename=\"%s\"\n\n",
266                          mime_boundary_leader, opt->mime_boundary,
267                          filename.buf,
268                          opt->no_inline ? "attachment" : "inline",
269                          filename.buf);
270                 opt->diffopt.stat_sep = buffer;
271                 strbuf_release(&filename);
272         }
273         *subject_p = subject;
274         *extra_headers_p = extra_headers;
277 void show_log(struct rev_info *opt)
279         struct strbuf msgbuf = STRBUF_INIT;
280         struct log_info *log = opt->loginfo;
281         struct commit *commit = log->commit, *parent = log->parent;
282         int abbrev_commit = opt->abbrev_commit ? opt->abbrev : 40;
283         const char *extra_headers = opt->extra_headers;
284         struct pretty_print_context ctx = {0};
286         opt->loginfo = NULL;
287         if (!opt->verbose_header) {
288                 graph_show_commit(opt->graph);
290                 if (!opt->graph) {
291                         if (commit->object.flags & BOUNDARY)
292                                 putchar('-');
293                         else if (commit->object.flags & UNINTERESTING)
294                                 putchar('^');
295                         else if (opt->left_right) {
296                                 if (commit->object.flags & SYMMETRIC_LEFT)
297                                         putchar('<');
298                                 else
299                                         putchar('>');
300                         }
301                 }
302                 fputs(find_unique_abbrev(commit->object.sha1, abbrev_commit), stdout);
303                 if (opt->print_parents)
304                         show_parents(commit, abbrev_commit);
305                 show_decorations(opt, commit);
306                 if (opt->graph && !graph_is_commit_finished(opt->graph)) {
307                         putchar('\n');
308                         graph_show_remainder(opt->graph);
309                 }
310                 putchar(opt->diffopt.line_termination);
311                 return;
312         }
314         /*
315          * If use_terminator is set, we already handled any record termination
316          * at the end of the last record.
317          * Otherwise, add a diffopt.line_termination character before all
318          * entries but the first.  (IOW, as a separator between entries)
319          */
320         if (opt->shown_one && !opt->use_terminator) {
321                 /*
322                  * If entries are separated by a newline, the output
323                  * should look human-readable.  If the last entry ended
324                  * with a newline, print the graph output before this
325                  * newline.  Otherwise it will end up as a completely blank
326                  * line and will look like a gap in the graph.
327                  *
328                  * If the entry separator is not a newline, the output is
329                  * primarily intended for programmatic consumption, and we
330                  * never want the extra graph output before the entry
331                  * separator.
332                  */
333                 if (opt->diffopt.line_termination == '\n' &&
334                     !opt->missing_newline)
335                         graph_show_padding(opt->graph);
336                 putchar(opt->diffopt.line_termination);
337         }
338         opt->shown_one = 1;
340         /*
341          * If the history graph was requested,
342          * print the graph, up to this commit's line
343          */
344         graph_show_commit(opt->graph);
346         /*
347          * Print header line of header..
348          */
350         if (opt->commit_format == CMIT_FMT_EMAIL) {
351                 log_write_email_headers(opt, commit, &ctx.subject, &extra_headers,
352                                         &ctx.need_8bit_cte);
353         } else if (opt->commit_format != CMIT_FMT_USERFORMAT) {
354                 fputs(diff_get_color_opt(&opt->diffopt, DIFF_COMMIT), stdout);
355                 if (opt->commit_format != CMIT_FMT_ONELINE)
356                         fputs("commit ", stdout);
358                 if (!opt->graph) {
359                         if (commit->object.flags & BOUNDARY)
360                                 putchar('-');
361                         else if (commit->object.flags & UNINTERESTING)
362                                 putchar('^');
363                         else if (opt->left_right) {
364                                 if (commit->object.flags & SYMMETRIC_LEFT)
365                                         putchar('<');
366                                 else
367                                         putchar('>');
368                         }
369                 }
370                 fputs(find_unique_abbrev(commit->object.sha1, abbrev_commit),
371                       stdout);
372                 if (opt->print_parents)
373                         show_parents(commit, abbrev_commit);
374                 if (parent)
375                         printf(" (from %s)",
376                                find_unique_abbrev(parent->object.sha1,
377                                                   abbrev_commit));
378                 show_decorations(opt, commit);
379                 printf("%s", diff_get_color_opt(&opt->diffopt, DIFF_RESET));
380                 if (opt->commit_format == CMIT_FMT_ONELINE) {
381                         putchar(' ');
382                 } else {
383                         putchar('\n');
384                         graph_show_oneline(opt->graph);
385                 }
386                 if (opt->reflog_info) {
387                         /*
388                          * setup_revisions() ensures that opt->reflog_info
389                          * and opt->graph cannot both be set,
390                          * so we don't need to worry about printing the
391                          * graph info here.
392                          */
393                         show_reflog_message(opt->reflog_info,
394                                     opt->commit_format == CMIT_FMT_ONELINE,
395                                     opt->date_mode_explicit ?
396                                         opt->date_mode :
397                                         DATE_NORMAL);
398                         if (opt->commit_format == CMIT_FMT_ONELINE)
399                                 return;
400                 }
401         }
403         if (!commit->buffer)
404                 return;
406         /*
407          * And then the pretty-printed message itself
408          */
409         if (ctx.need_8bit_cte >= 0)
410                 ctx.need_8bit_cte = has_non_ascii(opt->add_signoff);
411         ctx.date_mode = opt->date_mode;
412         ctx.abbrev = opt->diffopt.abbrev;
413         ctx.after_subject = extra_headers;
414         ctx.reflog_info = opt->reflog_info;
415         pretty_print_commit(opt->commit_format, commit, &msgbuf, &ctx);
417         if (opt->add_signoff)
418                 append_signoff(&msgbuf, opt->add_signoff);
419         if (opt->show_log_size) {
420                 printf("log size %i\n", (int)msgbuf.len);
421                 graph_show_oneline(opt->graph);
422         }
424         /*
425          * Set opt->missing_newline if msgbuf doesn't
426          * end in a newline (including if it is empty)
427          */
428         if (!msgbuf.len || msgbuf.buf[msgbuf.len - 1] != '\n')
429                 opt->missing_newline = 1;
430         else
431                 opt->missing_newline = 0;
433         if (opt->graph)
434                 graph_show_commit_msg(opt->graph, &msgbuf);
435         else
436                 fwrite(msgbuf.buf, sizeof(char), msgbuf.len, stdout);
437         if (opt->use_terminator) {
438                 if (!opt->missing_newline)
439                         graph_show_padding(opt->graph);
440                 putchar('\n');
441         }
443         strbuf_release(&msgbuf);
446 int log_tree_diff_flush(struct rev_info *opt)
448         diffcore_std(&opt->diffopt);
450         if (diff_queue_is_empty()) {
451                 int saved_fmt = opt->diffopt.output_format;
452                 opt->diffopt.output_format = DIFF_FORMAT_NO_OUTPUT;
453                 diff_flush(&opt->diffopt);
454                 opt->diffopt.output_format = saved_fmt;
455                 return 0;
456         }
458         if (opt->loginfo && !opt->no_commit_id) {
459                 /* When showing a verbose header (i.e. log message),
460                  * and not in --pretty=oneline format, we would want
461                  * an extra newline between the end of log and the
462                  * output for readability.
463                  */
464                 show_log(opt);
465                 if ((opt->diffopt.output_format & ~DIFF_FORMAT_NO_OUTPUT) &&
466                     opt->verbose_header &&
467                     opt->commit_format != CMIT_FMT_ONELINE) {
468                         int pch = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH;
469                         if ((pch & opt->diffopt.output_format) == pch)
470                                 printf("---");
471                         putchar('\n');
472                 }
473         }
474         diff_flush(&opt->diffopt);
475         return 1;
478 static int do_diff_combined(struct rev_info *opt, struct commit *commit)
480         unsigned const char *sha1 = commit->object.sha1;
482         diff_tree_combined_merge(sha1, opt->dense_combined_merges, opt);
483         return !opt->loginfo;
487  * Show the diff of a commit.
489  * Return true if we printed any log info messages
490  */
491 static int log_tree_diff(struct rev_info *opt, struct commit *commit, struct log_info *log)
493         int showed_log;
494         struct commit_list *parents;
495         unsigned const char *sha1 = commit->object.sha1;
497         if (!opt->diff && !DIFF_OPT_TST(&opt->diffopt, EXIT_WITH_STATUS))
498                 return 0;
500         /* Root commit? */
501         parents = commit->parents;
502         if (!parents) {
503                 if (opt->show_root_diff) {
504                         diff_root_tree_sha1(sha1, "", &opt->diffopt);
505                         log_tree_diff_flush(opt);
506                 }
507                 return !opt->loginfo;
508         }
510         /* More than one parent? */
511         if (parents && parents->next) {
512                 if (opt->ignore_merges)
513                         return 0;
514                 else if (opt->combine_merges)
515                         return do_diff_combined(opt, commit);
517                 /* If we show individual diffs, show the parent info */
518                 log->parent = parents->item;
519         }
521         showed_log = 0;
522         for (;;) {
523                 struct commit *parent = parents->item;
525                 diff_tree_sha1(parent->object.sha1, sha1, "", &opt->diffopt);
526                 log_tree_diff_flush(opt);
528                 showed_log |= !opt->loginfo;
530                 /* Set up the log info for the next parent, if any.. */
531                 parents = parents->next;
532                 if (!parents)
533                         break;
534                 log->parent = parents->item;
535                 opt->loginfo = log;
536         }
537         return showed_log;
540 int log_tree_commit(struct rev_info *opt, struct commit *commit)
542         struct log_info log;
543         int shown;
545         log.commit = commit;
546         log.parent = NULL;
547         opt->loginfo = &log;
549         shown = log_tree_diff(opt, commit, &log);
550         if (!shown && opt->loginfo && opt->always_show_header) {
551                 log.parent = NULL;
552                 show_log(opt);
553                 shown = 1;
554         }
555         opt->loginfo = NULL;
556         maybe_flush_or_die(stdout, "stdout");
557         return shown;