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)
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 *subject = NULL, *extra_headers = opt->extra_headers;
219 int need_8bit_cte = 0;
220 opt->loginfo = NULL;
222 if (!opt->verbose_header) {
223 if (commit->object.flags & BOUNDARY)
224 putchar('-');
225 else if (commit->object.flags & UNINTERESTING)
226 putchar('^');
227 else if (opt->left_right) {
228 if (commit->object.flags & SYMMETRIC_LEFT)
229 putchar('<');
230 else
231 putchar('>');
232 }
233 fputs(diff_unique_abbrev(commit->object.sha1, abbrev_commit), stdout);
234 if (opt->parents)
235 show_parents(commit, abbrev_commit);
236 show_decorations(commit);
237 putchar(opt->diffopt.line_termination);
238 return;
239 }
240 /*
242 * If use_terminator is set, add a newline at the end of the entry.
243 * Otherwise, add a diffopt.line_termination character before all
244 * entries but the first. (IOW, as a separator between entries)
245 */
246 if (opt->shown_one && !opt->use_terminator)
247 putchar(opt->diffopt.line_termination);
248 opt->shown_one = 1;
249 /*
251 * Print header line of header..
252 */
253 if (opt->commit_format == CMIT_FMT_EMAIL) {
255 log_write_email_headers(opt, sha1_to_hex(commit->object.sha1),
256 &subject, &extra_headers,
257 &need_8bit_cte);
258 } else if (opt->commit_format != CMIT_FMT_USERFORMAT) {
259 fputs(diff_get_color_opt(&opt->diffopt, DIFF_COMMIT), stdout);
260 if (opt->commit_format != CMIT_FMT_ONELINE)
261 fputs("commit ", stdout);
262 if (commit->object.flags & BOUNDARY)
263 putchar('-');
264 else if (commit->object.flags & UNINTERESTING)
265 putchar('^');
266 else if (opt->left_right) {
267 if (commit->object.flags & SYMMETRIC_LEFT)
268 putchar('<');
269 else
270 putchar('>');
271 }
272 fputs(diff_unique_abbrev(commit->object.sha1, abbrev_commit),
273 stdout);
274 if (opt->parents)
275 show_parents(commit, abbrev_commit);
276 if (parent)
277 printf(" (from %s)",
278 diff_unique_abbrev(parent->object.sha1,
279 abbrev_commit));
280 show_decorations(commit);
281 printf("%s", diff_get_color_opt(&opt->diffopt, DIFF_RESET));
282 putchar(opt->commit_format == CMIT_FMT_ONELINE ? ' ' : '\n');
283 if (opt->reflog_info) {
284 show_reflog_message(opt->reflog_info,
285 opt->commit_format == CMIT_FMT_ONELINE,
286 opt->date_mode);
287 if (opt->commit_format == CMIT_FMT_ONELINE)
288 return;
289 }
290 }
291 if (!commit->buffer)
293 return;
294 /*
296 * And then the pretty-printed message itself
297 */
298 strbuf_init(&msgbuf, 0);
299 if (need_8bit_cte >= 0)
300 need_8bit_cte = has_non_ascii(opt->add_signoff);
301 pretty_print_commit(opt->commit_format, commit, &msgbuf,
302 abbrev, subject, extra_headers, opt->date_mode,
303 need_8bit_cte);
304 if (opt->add_signoff)
306 append_signoff(&msgbuf, opt->add_signoff);
307 if (opt->show_log_size)
308 printf("log size %i\n", (int)msgbuf.len);
309 if (msgbuf.len)
311 fwrite(msgbuf.buf, sizeof(char), msgbuf.len, stdout);
312 if (opt->use_terminator)
313 putchar('\n');
314 strbuf_release(&msgbuf);
315}
316int log_tree_diff_flush(struct rev_info *opt)
318{
319 diffcore_std(&opt->diffopt);
320 if (diff_queue_is_empty()) {
322 int saved_fmt = opt->diffopt.output_format;
323 opt->diffopt.output_format = DIFF_FORMAT_NO_OUTPUT;
324 diff_flush(&opt->diffopt);
325 opt->diffopt.output_format = saved_fmt;
326 return 0;
327 }
328 if (opt->loginfo && !opt->no_commit_id) {
330 /* When showing a verbose header (i.e. log message),
331 * and not in --pretty=oneline format, we would want
332 * an extra newline between the end of log and the
333 * output for readability.
334 */
335 show_log(opt);
336 if ((opt->diffopt.output_format & ~DIFF_FORMAT_NO_OUTPUT) &&
337 opt->verbose_header &&
338 opt->commit_format != CMIT_FMT_ONELINE) {
339 int pch = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH;
340 if ((pch & opt->diffopt.output_format) == pch)
341 printf("---");
342 putchar('\n');
343 }
344 }
345 diff_flush(&opt->diffopt);
346 return 1;
347}
348static int do_diff_combined(struct rev_info *opt, struct commit *commit)
350{
351 unsigned const char *sha1 = commit->object.sha1;
352 diff_tree_combined_merge(sha1, opt->dense_combined_merges, opt);
354 return !opt->loginfo;
355}
356/*
358 * Show the diff of a commit.
359 *
360 * Return true if we printed any log info messages
361 */
362static int log_tree_diff(struct rev_info *opt, struct commit *commit, struct log_info *log)
363{
364 int showed_log;
365 struct commit_list *parents;
366 unsigned const char *sha1 = commit->object.sha1;
367 if (!opt->diff)
369 return 0;
370 /* Root commit? */
372 parents = commit->parents;
373 if (!parents) {
374 if (opt->show_root_diff) {
375 diff_root_tree_sha1(sha1, "", &opt->diffopt);
376 log_tree_diff_flush(opt);
377 }
378 return !opt->loginfo;
379 }
380 /* More than one parent? */
382 if (parents && parents->next) {
383 if (opt->ignore_merges)
384 return 0;
385 else if (opt->combine_merges)
386 return do_diff_combined(opt, commit);
387 /* If we show individual diffs, show the parent info */
389 log->parent = parents->item;
390 }
391 showed_log = 0;
393 for (;;) {
394 struct commit *parent = parents->item;
395 diff_tree_sha1(parent->object.sha1, sha1, "", &opt->diffopt);
397 log_tree_diff_flush(opt);
398 showed_log |= !opt->loginfo;
400 /* Set up the log info for the next parent, if any.. */
402 parents = parents->next;
403 if (!parents)
404 break;
405 log->parent = parents->item;
406 opt->loginfo = log;
407 }
408 return showed_log;
409}
410int log_tree_commit(struct rev_info *opt, struct commit *commit)
412{
413 struct log_info log;
414 int shown;
415 log.commit = commit;
417 log.parent = NULL;
418 opt->loginfo = &log;
419 shown = log_tree_diff(opt, commit, &log);
421 if (!shown && opt->loginfo && opt->always_show_header) {
422 log.parent = NULL;
423 show_log(opt);
424 shown = 1;
425 }
426 opt->loginfo = NULL;
427 maybe_flush_or_die(stdout, "stdout");
428 return shown;
429}