1#include "cache.h"
2#include "diff.h"
3#include "commit.h"
4#include "log-tree.h"
5#include "reflog-walk.h"
6static void show_parents(struct commit *commit, int abbrev)
8{
9 struct commit_list *p;
10 for (p = commit->parents; p ; p = p->next) {
11 struct commit *parent = p->item;
12 printf(" %s", diff_unique_abbrev(parent->object.sha1, abbrev));
13 }
14}
15/*
17 * Search for "^[-A-Za-z]+: [^@]+@" pattern. It usually matches
18 * Signed-off-by: and Acked-by: lines.
19 */
20static int detect_any_signoff(char *letter, int size)
21{
22 char ch, *cp;
23 int seen_colon = 0;
24 int seen_at = 0;
25 int seen_name = 0;
26 int seen_head = 0;
27 cp = letter + size;
29 while (letter <= --cp && (ch = *cp) == '\n')
30 continue;
31 while (letter <= cp) {
33 ch = *cp--;
34 if (ch == '\n')
35 break;
36 if (!seen_at) {
38 if (ch == '@')
39 seen_at = 1;
40 continue;
41 }
42 if (!seen_colon) {
43 if (ch == '@')
44 return 0;
45 else if (ch == ':')
46 seen_colon = 1;
47 else
48 seen_name = 1;
49 continue;
50 }
51 if (('A' <= ch && ch <= 'Z') ||
52 ('a' <= ch && ch <= 'z') ||
53 ch == '-') {
54 seen_head = 1;
55 continue;
56 }
57 /* no empty last line doesn't match */
58 return 0;
59 }
60 return seen_head && seen_name;
61}
62static int append_signoff(char *buf, int buf_sz, int at, const char *signoff)
64{
65 static const char signed_off_by[] = "Signed-off-by: ";
66 int signoff_len = strlen(signoff);
67 int has_signoff = 0;
68 char *cp = buf;
69 /* Do we have enough space to add it? */
71 if (buf_sz - at <= strlen(signed_off_by) + signoff_len + 3)
72 return at;
73 /* First see if we already have the sign-off by the signer */
75 while ((cp = strstr(cp, signed_off_by))) {
76 has_signoff = 1;
78 cp += strlen(signed_off_by);
80 if (cp + signoff_len >= buf + at)
81 break;
82 if (strncmp(cp, signoff, signoff_len))
83 continue;
84 if (!isspace(cp[signoff_len]))
85 continue;
86 /* we already have him */
87 return at;
88 }
89 if (!has_signoff)
91 has_signoff = detect_any_signoff(buf, at);
92 if (!has_signoff)
94 buf[at++] = '\n';
95 strcpy(buf + at, signed_off_by);
97 at += strlen(signed_off_by);
98 strcpy(buf + at, signoff);
99 at += signoff_len;
100 buf[at++] = '\n';
101 buf[at] = 0;
102 return at;
103}
104static unsigned int digits_in_number(unsigned int number)
106{
107 unsigned int i = 10, result = 1;
108 while (i <= number) {
109 i *= 10;
110 result++;
111 }
112 return result;
113}
114void show_log(struct rev_info *opt, const char *sep)
116{
117 static char this_header[16384];
118 struct log_info *log = opt->loginfo;
119 struct commit *commit = log->commit, *parent = log->parent;
120 int abbrev = opt->diffopt.abbrev;
121 int abbrev_commit = opt->abbrev_commit ? opt->abbrev : 40;
122 const char *extra;
123 int len;
124 const char *subject = NULL, *extra_headers = opt->extra_headers;
125 opt->loginfo = NULL;
127 if (!opt->verbose_header) {
128 if (opt->left_right) {
129 if (commit->object.flags & BOUNDARY)
130 putchar('-');
131 else if (commit->object.flags & SYMMETRIC_LEFT)
132 putchar('<');
133 else
134 putchar('>');
135 }
136 fputs(diff_unique_abbrev(commit->object.sha1, abbrev_commit), stdout);
137 if (opt->parents)
138 show_parents(commit, abbrev_commit);
139 putchar(opt->diffopt.line_termination);
140 return;
141 }
142 /*
144 * The "oneline" format has several special cases:
145 * - The pretty-printed commit lacks a newline at the end
146 * of the buffer, but we do want to make sure that we
147 * have a newline there. If the separator isn't already
148 * a newline, add an extra one.
149 * - unlike other log messages, the one-line format does
150 * not have an empty line between entries.
151 */
152 extra = "";
153 if (*sep != '\n' && opt->commit_format == CMIT_FMT_ONELINE)
154 extra = "\n";
155 if (opt->shown_one && opt->commit_format != CMIT_FMT_ONELINE)
156 putchar(opt->diffopt.line_termination);
157 opt->shown_one = 1;
158 /*
160 * Print header line of header..
161 */
162 if (opt->commit_format == CMIT_FMT_EMAIL) {
164 char *sha1 = sha1_to_hex(commit->object.sha1);
165 if (opt->total > 0) {
166 static char buffer[64];
167 snprintf(buffer, sizeof(buffer),
168 "Subject: [PATCH %0*d/%d] ",
169 digits_in_number(opt->total),
170 opt->nr, opt->total);
171 subject = buffer;
172 } else if (opt->total == 0)
173 subject = "Subject: [PATCH] ";
174 else
175 subject = "Subject: ";
176 printf("From %s Mon Sep 17 00:00:00 2001\n", sha1);
178 if (opt->message_id)
179 printf("Message-Id: <%s>\n", opt->message_id);
180 if (opt->ref_message_id)
181 printf("In-Reply-To: <%s>\nReferences: <%s>\n",
182 opt->ref_message_id, opt->ref_message_id);
183 if (opt->mime_boundary) {
184 static char subject_buffer[1024];
185 static char buffer[1024];
186 snprintf(subject_buffer, sizeof(subject_buffer) - 1,
187 "%s"
188 "MIME-Version: 1.0\n"
189 "Content-Type: multipart/mixed;\n"
190 " boundary=\"%s%s\"\n"
191 "\n"
192 "This is a multi-part message in MIME "
193 "format.\n"
194 "--%s%s\n"
195 "Content-Type: text/plain; "
196 "charset=UTF-8; format=fixed\n"
197 "Content-Transfer-Encoding: 8bit\n\n",
198 extra_headers ? extra_headers : "",
199 mime_boundary_leader, opt->mime_boundary,
200 mime_boundary_leader, opt->mime_boundary);
201 extra_headers = subject_buffer;
202 snprintf(buffer, sizeof(buffer) - 1,
204 "--%s%s\n"
205 "Content-Type: text/x-patch;\n"
206 " name=\"%s.diff\"\n"
207 "Content-Transfer-Encoding: 8bit\n"
208 "Content-Disposition: inline;\n"
209 " filename=\"%s.diff\"\n\n",
210 mime_boundary_leader, opt->mime_boundary,
211 sha1, sha1);
212 opt->diffopt.stat_sep = buffer;
213 }
214 } else {
215 fputs(diff_get_color(opt->diffopt.color_diff, DIFF_COMMIT),
216 stdout);
217 if (opt->commit_format != CMIT_FMT_ONELINE)
218 fputs("commit ", stdout);
219 if (opt->left_right) {
220 if (commit->object.flags & BOUNDARY)
221 putchar('-');
222 else if (commit->object.flags & SYMMETRIC_LEFT)
223 putchar('<');
224 else
225 putchar('>');
226 }
227 fputs(diff_unique_abbrev(commit->object.sha1, abbrev_commit),
228 stdout);
229 if (opt->parents)
230 show_parents(commit, abbrev_commit);
231 if (parent)
232 printf(" (from %s)",
233 diff_unique_abbrev(parent->object.sha1,
234 abbrev_commit));
235 printf("%s",
236 diff_get_color(opt->diffopt.color_diff, DIFF_RESET));
237 putchar(opt->commit_format == CMIT_FMT_ONELINE ? ' ' : '\n');
238 if (opt->reflog_info) {
239 show_reflog_message(opt->reflog_info,
240 opt->commit_format == CMIT_FMT_ONELINE,
241 opt->relative_date);
242 if (opt->commit_format == CMIT_FMT_ONELINE) {
243 printf("%s", sep);
244 return;
245 }
246 }
247 }
248 /*
250 * And then the pretty-printed message itself
251 */
252 len = pretty_print_commit(opt->commit_format, commit, ~0u, this_header,
253 sizeof(this_header), abbrev, subject,
254 extra_headers, opt->relative_date);
255 if (opt->add_signoff)
257 len = append_signoff(this_header, sizeof(this_header), len,
258 opt->add_signoff);
259 printf("%s%s%s", this_header, extra, sep);
260}
261int log_tree_diff_flush(struct rev_info *opt)
263{
264 diffcore_std(&opt->diffopt);
265 if (diff_queue_is_empty()) {
267 int saved_fmt = opt->diffopt.output_format;
268 opt->diffopt.output_format = DIFF_FORMAT_NO_OUTPUT;
269 diff_flush(&opt->diffopt);
270 opt->diffopt.output_format = saved_fmt;
271 return 0;
272 }
273 if (opt->loginfo && !opt->no_commit_id) {
275 /* When showing a verbose header (i.e. log message),
276 * and not in --pretty=oneline format, we would want
277 * an extra newline between the end of log and the
278 * output for readability.
279 */
280 show_log(opt, opt->diffopt.msg_sep);
281 if (opt->verbose_header &&
282 opt->commit_format != CMIT_FMT_ONELINE) {
283 int pch = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH;
284 if ((pch & opt->diffopt.output_format) == pch)
285 printf("---");
286 putchar('\n');
287 }
288 }
289 diff_flush(&opt->diffopt);
290 return 1;
291}
292static int do_diff_combined(struct rev_info *opt, struct commit *commit)
294{
295 unsigned const char *sha1 = commit->object.sha1;
296 diff_tree_combined_merge(sha1, opt->dense_combined_merges, opt);
298 return !opt->loginfo;
299}
300/*
302 * Show the diff of a commit.
303 *
304 * Return true if we printed any log info messages
305 */
306static int log_tree_diff(struct rev_info *opt, struct commit *commit, struct log_info *log)
307{
308 int showed_log;
309 struct commit_list *parents;
310 unsigned const char *sha1 = commit->object.sha1;
311 if (!opt->diff)
313 return 0;
314 /* Root commit? */
316 parents = commit->parents;
317 if (!parents) {
318 if (opt->show_root_diff) {
319 diff_root_tree_sha1(sha1, "", &opt->diffopt);
320 log_tree_diff_flush(opt);
321 }
322 return !opt->loginfo;
323 }
324 /* More than one parent? */
326 if (parents && parents->next) {
327 if (opt->ignore_merges)
328 return 0;
329 else if (opt->combine_merges)
330 return do_diff_combined(opt, commit);
331 /* If we show individual diffs, show the parent info */
333 log->parent = parents->item;
334 }
335 showed_log = 0;
337 for (;;) {
338 struct commit *parent = parents->item;
339 diff_tree_sha1(parent->object.sha1, sha1, "", &opt->diffopt);
341 log_tree_diff_flush(opt);
342 showed_log |= !opt->loginfo;
344 /* Set up the log info for the next parent, if any.. */
346 parents = parents->next;
347 if (!parents)
348 break;
349 log->parent = parents->item;
350 opt->loginfo = log;
351 }
352 return showed_log;
353}
354int log_tree_commit(struct rev_info *opt, struct commit *commit)
356{
357 struct log_info log;
358 int shown;
359 log.commit = commit;
361 log.parent = NULL;
362 opt->loginfo = &log;
363 shown = log_tree_diff(opt, commit, &log);
365 if (!shown && opt->loginfo && opt->always_show_header) {
366 log.parent = NULL;
367 show_log(opt, "");
368 shown = 1;
369 }
370 opt->loginfo = NULL;
371 return shown;
372}