1#include "cache.h"
2#include "diff.h"
3#include "commit.h"
4#include "log-tree.h"
5#include "reflog-walk.h"
6struct decoration name_decoration = { "object names" };
8static void show_parents(struct commit *commit, int abbrev)
10{
11 struct commit_list *p;
12 for (p = commit->parents; p ; p = p->next) {
13 struct commit *parent = p->item;
14 printf(" %s", diff_unique_abbrev(parent->object.sha1, abbrev));
15 }
16}
17void show_decorations(struct commit *commit)
19{
20 const char *prefix;
21 struct name_decoration *decoration;
22 decoration = lookup_decoration(&name_decoration, &commit->object);
24 if (!decoration)
25 return;
26 prefix = " (";
27 while (decoration) {
28 printf("%s%s", prefix, decoration->name);
29 prefix = ", ";
30 decoration = decoration->next;
31 }
32 putchar(')');
33}
34/*
36 * Search for "^[-A-Za-z]+: [^@]+@" pattern. It usually matches
37 * Signed-off-by: and Acked-by: lines.
38 */
39static int detect_any_signoff(char *letter, int size)
40{
41 char ch, *cp;
42 int seen_colon = 0;
43 int seen_at = 0;
44 int seen_name = 0;
45 int seen_head = 0;
46 cp = letter + size;
48 while (letter <= --cp && (ch = *cp) == '\n')
49 continue;
50 while (letter <= cp) {
52 ch = *cp--;
53 if (ch == '\n')
54 break;
55 if (!seen_at) {
57 if (ch == '@')
58 seen_at = 1;
59 continue;
60 }
61 if (!seen_colon) {
62 if (ch == '@')
63 return 0;
64 else if (ch == ':')
65 seen_colon = 1;
66 else
67 seen_name = 1;
68 continue;
69 }
70 if (('A' <= ch && ch <= 'Z') ||
71 ('a' <= ch && ch <= 'z') ||
72 ch == '-') {
73 seen_head = 1;
74 continue;
75 }
76 /* no empty last line doesn't match */
77 return 0;
78 }
79 return seen_head && seen_name;
80}
81static void append_signoff(struct strbuf *sb, const char *signoff)
83{
84 static const char signed_off_by[] = "Signed-off-by: ";
85 size_t signoff_len = strlen(signoff);
86 int has_signoff = 0;
87 char *cp;
88 cp = sb->buf;
90 /* First see if we already have the sign-off by the signer */
92 while ((cp = strstr(cp, signed_off_by))) {
93 has_signoff = 1;
95 cp += strlen(signed_off_by);
97 if (cp + signoff_len >= sb->buf + sb->len)
98 break;
99 if (strncmp(cp, signoff, signoff_len))
100 continue;
101 if (!isspace(cp[signoff_len]))
102 continue;
103 /* we already have him */
104 return;
105 }
106 if (!has_signoff)
108 has_signoff = detect_any_signoff(sb->buf, sb->len);
109 if (!has_signoff)
111 strbuf_addch(sb, '\n');
112 strbuf_addstr(sb, signed_off_by);
114 strbuf_add(sb, signoff, signoff_len);
115 strbuf_addch(sb, '\n');
116}
117static unsigned int digits_in_number(unsigned int number)
119{
120 unsigned int i = 10, result = 1;
121 while (i <= number) {
122 i *= 10;
123 result++;
124 }
125 return result;
126}
127static int has_non_ascii(const char *s)
129{
130 int ch;
131 if (!s)
132 return 0;
133 while ((ch = *s++) != '\0') {
134 if (non_ascii(ch))
135 return 1;
136 }
137 return 0;
138}
139void log_write_email_headers(struct rev_info *opt, const char *name,
141 const char **subject_p,
142 const char **extra_headers_p,
143 int *need_8bit_cte_p)
144{
145 const char *subject = NULL;
146 const char *extra_headers = opt->extra_headers;
147 *need_8bit_cte_p = 0; /* unknown */
149 if (opt->total > 0) {
150 static char buffer[64];
151 snprintf(buffer, sizeof(buffer),
152 "Subject: [%s %0*d/%d] ",
153 opt->subject_prefix,
154 digits_in_number(opt->total),
155 opt->nr, opt->total);
156 subject = buffer;
157 } else if (opt->total == 0 && opt->subject_prefix && *opt->subject_prefix) {
158 static char buffer[256];
159 snprintf(buffer, sizeof(buffer),
160 "Subject: [%s] ",
161 opt->subject_prefix);
162 subject = buffer;
163 } else {
164 subject = "Subject: ";
165 }
166 printf("From %s Mon Sep 17 00:00:00 2001\n", name);
168 if (opt->message_id)
169 printf("Message-Id: <%s>\n", opt->message_id);
170 if (opt->ref_message_id)
171 printf("In-Reply-To: <%s>\nReferences: <%s>\n",
172 opt->ref_message_id, opt->ref_message_id);
173 if (opt->mime_boundary) {
174 static char subject_buffer[1024];
175 static char buffer[1024];
176 *need_8bit_cte_p = -1; /* NEVER */
177 snprintf(subject_buffer, sizeof(subject_buffer) - 1,
178 "%s"
179 "MIME-Version: 1.0\n"
180 "Content-Type: multipart/mixed;"
181 " boundary=\"%s%s\"\n"
182 "\n"
183 "This is a multi-part message in MIME "
184 "format.\n"
185 "--%s%s\n"
186 "Content-Type: text/plain; "
187 "charset=UTF-8; format=fixed\n"
188 "Content-Transfer-Encoding: 8bit\n\n",
189 extra_headers ? extra_headers : "",
190 mime_boundary_leader, opt->mime_boundary,
191 mime_boundary_leader, opt->mime_boundary);
192 extra_headers = subject_buffer;
193 snprintf(buffer, sizeof(buffer) - 1,
195 "--%s%s\n"
196 "Content-Type: text/x-patch;"
197 " name=\"%s.diff\"\n"
198 "Content-Transfer-Encoding: 8bit\n"
199 "Content-Disposition: %s;"
200 " filename=\"%s.diff\"\n\n",
201 mime_boundary_leader, opt->mime_boundary,
202 name,
203 opt->no_inline ? "attachment" : "inline",
204 name);
205 opt->diffopt.stat_sep = buffer;
206 }
207 *subject_p = subject;
208 *extra_headers_p = extra_headers;
209}
210void show_log(struct rev_info *opt, const char *sep)
212{
213 struct strbuf msgbuf;
214 struct log_info *log = opt->loginfo;
215 struct commit *commit = log->commit, *parent = log->parent;
216 int abbrev = opt->diffopt.abbrev;
217 int abbrev_commit = opt->abbrev_commit ? opt->abbrev : 40;
218 const char *extra;
219 const char *subject = NULL, *extra_headers = opt->extra_headers;
220 int need_8bit_cte = 0;
221 opt->loginfo = NULL;
223 if (!opt->verbose_header) {
224 if (commit->object.flags & BOUNDARY)
225 putchar('-');
226 else if (commit->object.flags & UNINTERESTING)
227 putchar('^');
228 else if (opt->left_right) {
229 if (commit->object.flags & SYMMETRIC_LEFT)
230 putchar('<');
231 else
232 putchar('>');
233 }
234 fputs(diff_unique_abbrev(commit->object.sha1, abbrev_commit), stdout);
235 if (opt->parents)
236 show_parents(commit, abbrev_commit);
237 show_decorations(commit);
238 putchar(opt->diffopt.line_termination);
239 return;
240 }
241 /*
243 * The "oneline" format has several special cases:
244 * - The pretty-printed commit lacks a newline at the end
245 * of the buffer, but we do want to make sure that we
246 * have a newline there. If the separator isn't already
247 * a newline, add an extra one.
248 * - unlike other log messages, the one-line format does
249 * not have an empty line between entries.
250 */
251 extra = "";
252 if (*sep != '\n' && opt->commit_format == CMIT_FMT_ONELINE)
253 extra = "\n";
254 if (opt->shown_one && opt->commit_format != CMIT_FMT_ONELINE)
255 putchar(opt->diffopt.line_termination);
256 opt->shown_one = 1;
257 /*
259 * Print header line of header..
260 */
261 if (opt->commit_format == CMIT_FMT_EMAIL) {
263 log_write_email_headers(opt, sha1_to_hex(commit->object.sha1),
264 &subject, &extra_headers,
265 &need_8bit_cte);
266 } else if (opt->commit_format != CMIT_FMT_USERFORMAT) {
267 fputs(diff_get_color_opt(&opt->diffopt, DIFF_COMMIT), stdout);
268 if (opt->commit_format != CMIT_FMT_ONELINE)
269 fputs("commit ", stdout);
270 if (commit->object.flags & BOUNDARY)
271 putchar('-');
272 else if (commit->object.flags & UNINTERESTING)
273 putchar('^');
274 else if (opt->left_right) {
275 if (commit->object.flags & SYMMETRIC_LEFT)
276 putchar('<');
277 else
278 putchar('>');
279 }
280 fputs(diff_unique_abbrev(commit->object.sha1, abbrev_commit),
281 stdout);
282 if (opt->parents)
283 show_parents(commit, abbrev_commit);
284 if (parent)
285 printf(" (from %s)",
286 diff_unique_abbrev(parent->object.sha1,
287 abbrev_commit));
288 show_decorations(commit);
289 printf("%s", diff_get_color_opt(&opt->diffopt, DIFF_RESET));
290 putchar(opt->commit_format == CMIT_FMT_ONELINE ? ' ' : '\n');
291 if (opt->reflog_info) {
292 show_reflog_message(opt->reflog_info,
293 opt->commit_format == CMIT_FMT_ONELINE,
294 opt->date_mode);
295 if (opt->commit_format == CMIT_FMT_ONELINE) {
296 printf("%s", sep);
297 return;
298 }
299 }
300 }
301 if (!commit->buffer)
303 return;
304 /*
306 * And then the pretty-printed message itself
307 */
308 strbuf_init(&msgbuf, 0);
309 if (need_8bit_cte >= 0)
310 need_8bit_cte = has_non_ascii(opt->add_signoff);
311 pretty_print_commit(opt->commit_format, commit, &msgbuf,
312 abbrev, subject, extra_headers, opt->date_mode,
313 need_8bit_cte);
314 if (opt->add_signoff)
316 append_signoff(&msgbuf, opt->add_signoff);
317 if (opt->show_log_size)
318 printf("log size %i\n", (int)msgbuf.len);
319 if (msgbuf.len)
321 printf("%s%s%s", msgbuf.buf, extra, sep);
322 strbuf_release(&msgbuf);
323}
324int log_tree_diff_flush(struct rev_info *opt)
326{
327 diffcore_std(&opt->diffopt);
328 if (diff_queue_is_empty()) {
330 int saved_fmt = opt->diffopt.output_format;
331 opt->diffopt.output_format = DIFF_FORMAT_NO_OUTPUT;
332 diff_flush(&opt->diffopt);
333 opt->diffopt.output_format = saved_fmt;
334 return 0;
335 }
336 if (opt->loginfo && !opt->no_commit_id) {
338 /* When showing a verbose header (i.e. log message),
339 * and not in --pretty=oneline format, we would want
340 * an extra newline between the end of log and the
341 * output for readability.
342 */
343 show_log(opt, opt->diffopt.msg_sep);
344 if ((opt->diffopt.output_format & ~DIFF_FORMAT_NO_OUTPUT) &&
345 opt->verbose_header &&
346 opt->commit_format != CMIT_FMT_ONELINE) {
347 int pch = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH;
348 if ((pch & opt->diffopt.output_format) == pch)
349 printf("---");
350 putchar('\n');
351 }
352 }
353 diff_flush(&opt->diffopt);
354 return 1;
355}
356static int do_diff_combined(struct rev_info *opt, struct commit *commit)
358{
359 unsigned const char *sha1 = commit->object.sha1;
360 diff_tree_combined_merge(sha1, opt->dense_combined_merges, opt);
362 return !opt->loginfo;
363}
364/*
366 * Show the diff of a commit.
367 *
368 * Return true if we printed any log info messages
369 */
370static int log_tree_diff(struct rev_info *opt, struct commit *commit, struct log_info *log)
371{
372 int showed_log;
373 struct commit_list *parents;
374 unsigned const char *sha1 = commit->object.sha1;
375 if (!opt->diff)
377 return 0;
378 /* Root commit? */
380 parents = commit->parents;
381 if (!parents) {
382 if (opt->show_root_diff) {
383 diff_root_tree_sha1(sha1, "", &opt->diffopt);
384 log_tree_diff_flush(opt);
385 }
386 return !opt->loginfo;
387 }
388 /* More than one parent? */
390 if (parents && parents->next) {
391 if (opt->ignore_merges)
392 return 0;
393 else if (opt->combine_merges)
394 return do_diff_combined(opt, commit);
395 /* If we show individual diffs, show the parent info */
397 log->parent = parents->item;
398 }
399 showed_log = 0;
401 for (;;) {
402 struct commit *parent = parents->item;
403 diff_tree_sha1(parent->object.sha1, sha1, "", &opt->diffopt);
405 log_tree_diff_flush(opt);
406 showed_log |= !opt->loginfo;
408 /* Set up the log info for the next parent, if any.. */
410 parents = parents->next;
411 if (!parents)
412 break;
413 log->parent = parents->item;
414 opt->loginfo = log;
415 }
416 return showed_log;
417}
418int log_tree_commit(struct rev_info *opt, struct commit *commit)
420{
421 struct log_info log;
422 int shown;
423 log.commit = commit;
425 log.parent = NULL;
426 opt->loginfo = &log;
427 shown = log_tree_diff(opt, commit, &log);
429 if (!shown && opt->loginfo && opt->always_show_header) {
430 log.parent = NULL;
431 show_log(opt, "");
432 shown = 1;
433 }
434 opt->loginfo = NULL;
435 maybe_flush_or_die(stdout, "stdout");
436 return shown;
437}