string-list: allow case-insensitive string list
[git/git.git] / pretty.c
CommitLineData
93fc05eb
JS
1#include "cache.h"
2#include "commit.h"
93fc05eb
JS
3#include "utf8.h"
4#include "diff.h"
5#include "revision.h"
c455c87c 6#include "string-list.h"
e0cbc397 7#include "mailmap.h"
3b3d443f 8#include "log-tree.h"
a97a7468 9#include "notes.h"
c002922a 10#include "color.h"
8f8f5476 11#include "reflog-walk.h"
f6667c5e 12#include "gpg-interface.h"
93fc05eb 13
93fc05eb 14static char *user_format;
40957891
WP
15static struct cmt_fmt_map {
16 const char *name;
17 enum cmit_fmt format;
18 int is_tformat;
2d7671ef
WP
19 int is_alias;
20 const char *user_format;
40957891 21} *commit_formats;
8028184e 22static size_t builtin_formats_len;
40957891 23static size_t commit_formats_len;
8028184e 24static size_t commit_formats_alloc;
40957891 25static struct cmt_fmt_map *find_commit_format(const char *sought);
93fc05eb 26
36407548
NS
27static void save_user_format(struct rev_info *rev, const char *cp, int is_tformat)
28{
29 free(user_format);
30 user_format = xstrdup(cp);
31 if (is_tformat)
32 rev->use_terminator = 1;
33 rev->commit_format = CMIT_FMT_USERFORMAT;
34}
35
8028184e 36static int git_pretty_formats_config(const char *var, const char *value, void *cb)
93fc05eb 37{
8028184e
WP
38 struct cmt_fmt_map *commit_format = NULL;
39 const char *name;
40 const char *fmt;
93fc05eb 41 int i;
8028184e
WP
42
43 if (prefixcmp(var, "pretty."))
44 return 0;
45
46 name = var + strlen("pretty.");
47 for (i = 0; i < builtin_formats_len; i++) {
48 if (!strcmp(commit_formats[i].name, name))
49 return 0;
50 }
51
52 for (i = builtin_formats_len; i < commit_formats_len; i++) {
53 if (!strcmp(commit_formats[i].name, name)) {
54 commit_format = &commit_formats[i];
55 break;
56 }
57 }
58
59 if (!commit_format) {
60 ALLOC_GROW(commit_formats, commit_formats_len+1,
61 commit_formats_alloc);
62 commit_format = &commit_formats[commit_formats_len];
95a2618f 63 memset(commit_format, 0, sizeof(*commit_format));
8028184e
WP
64 commit_formats_len++;
65 }
66
67 commit_format->name = xstrdup(name);
68 commit_format->format = CMIT_FMT_USERFORMAT;
69 git_config_string(&fmt, var, value);
70 if (!prefixcmp(fmt, "format:") || !prefixcmp(fmt, "tformat:")) {
71 commit_format->is_tformat = fmt[0] == 't';
72 fmt = strchr(fmt, ':') + 1;
73 } else if (strchr(fmt, '%'))
74 commit_format->is_tformat = 1;
75 else
76 commit_format->is_alias = 1;
77 commit_format->user_format = fmt;
78
79 return 0;
80}
81
40957891 82static void setup_commit_formats(void)
93fc05eb 83{
40957891
WP
84 struct cmt_fmt_map builtin_formats[] = {
85 { "raw", CMIT_FMT_RAW, 0 },
86 { "medium", CMIT_FMT_MEDIUM, 0 },
87 { "short", CMIT_FMT_SHORT, 0 },
88 { "email", CMIT_FMT_EMAIL, 0 },
89 { "fuller", CMIT_FMT_FULLER, 0 },
90 { "full", CMIT_FMT_FULL, 0 },
91 { "oneline", CMIT_FMT_ONELINE, 1 }
4da45bef 92 };
40957891 93 commit_formats_len = ARRAY_SIZE(builtin_formats);
8028184e
WP
94 builtin_formats_len = commit_formats_len;
95 ALLOC_GROW(commit_formats, commit_formats_len, commit_formats_alloc);
40957891
WP
96 memcpy(commit_formats, builtin_formats,
97 sizeof(*builtin_formats)*ARRAY_SIZE(builtin_formats));
8028184e
WP
98
99 git_config(git_pretty_formats_config, NULL);
40957891
WP
100}
101
2d7671ef
WP
102static struct cmt_fmt_map *find_commit_format_recursive(const char *sought,
103 const char *original,
104 int num_redirections)
40957891
WP
105{
106 struct cmt_fmt_map *found = NULL;
107 size_t found_match_len = 0;
108 int i;
109
2d7671ef
WP
110 if (num_redirections >= commit_formats_len)
111 die("invalid --pretty format: "
112 "'%s' references an alias which points to itself",
113 original);
40957891
WP
114
115 for (i = 0; i < commit_formats_len; i++) {
116 size_t match_len;
117
118 if (prefixcmp(commit_formats[i].name, sought))
119 continue;
120
121 match_len = strlen(commit_formats[i].name);
122 if (found == NULL || found_match_len > match_len) {
123 found = &commit_formats[i];
124 found_match_len = match_len;
125 }
126 }
2d7671ef
WP
127
128 if (found && found->is_alias) {
129 found = find_commit_format_recursive(found->user_format,
130 original,
131 num_redirections+1);
132 }
133
40957891
WP
134 return found;
135}
136
2d7671ef
WP
137static struct cmt_fmt_map *find_commit_format(const char *sought)
138{
139 if (!commit_formats)
140 setup_commit_formats();
141
142 return find_commit_format_recursive(sought, sought, 0);
143}
144
40957891
WP
145void get_commit_format(const char *arg, struct rev_info *rev)
146{
147 struct cmt_fmt_map *commit_format;
93fc05eb 148
4da45bef
JH
149 rev->use_terminator = 0;
150 if (!arg || !*arg) {
151 rev->commit_format = CMIT_FMT_DEFAULT;
152 return;
153 }
4da45bef 154 if (!prefixcmp(arg, "format:") || !prefixcmp(arg, "tformat:")) {
36407548 155 save_user_format(rev, strchr(arg, ':') + 1, arg[0] == 't');
4da45bef 156 return;
93fc05eb 157 }
40957891 158
36407548
NS
159 if (strchr(arg, '%')) {
160 save_user_format(rev, arg, 1);
161 return;
162 }
93fc05eb 163
40957891
WP
164 commit_format = find_commit_format(arg);
165 if (!commit_format)
166 die("invalid --pretty format: %s", arg);
167
168 rev->commit_format = commit_format->format;
169 rev->use_terminator = commit_format->is_tformat;
8028184e
WP
170 if (commit_format->format == CMIT_FMT_USERFORMAT) {
171 save_user_format(rev, commit_format->user_format,
172 commit_format->is_tformat);
173 }
93fc05eb
JS
174}
175
176/*
177 * Generic support for pretty-printing the header
178 */
179static int get_one_line(const char *msg)
180{
181 int ret = 0;
182
183 for (;;) {
184 char c = *msg++;
185 if (!c)
186 break;
187 ret++;
188 if (c == '\n')
189 break;
190 }
191 return ret;
192}
193
194/* High bit set, or ISO-2022-INT */
cc571142 195static int non_ascii(int ch)
93fc05eb 196{
c2e9364a 197 return !isascii(ch) || ch == '\033';
93fc05eb
JS
198}
199
28e9cf65
JS
200int has_non_ascii(const char *s)
201{
202 int ch;
203 if (!s)
204 return 0;
205 while ((ch = *s++) != '\0') {
206 if (non_ascii(ch))
207 return 1;
208 }
209 return 0;
210}
211
4d03c18a
JK
212static int is_rfc822_special(char ch)
213{
214 switch (ch) {
215 case '(':
216 case ')':
217 case '<':
218 case '>':
219 case '[':
220 case ']':
221 case ':':
222 case ';':
223 case '@':
224 case ',':
225 case '.':
226 case '"':
227 case '\\':
228 return 1;
229 default:
230 return 0;
231 }
232}
233
41dd00ba 234static int needs_rfc822_quoting(const char *s, int len)
4d03c18a
JK
235{
236 int i;
237 for (i = 0; i < len; i++)
238 if (is_rfc822_special(s[i]))
239 return 1;
240 return 0;
241}
242
f9b7204b
JS
243static int last_line_length(struct strbuf *sb)
244{
245 int i;
246
247 /* How many bytes are already used on the last line? */
248 for (i = sb->len - 1; i >= 0; i--)
249 if (sb->buf[i] == '\n')
250 break;
251 return sb->len - (i + 1);
252}
253
4d03c18a
JK
254static void add_rfc822_quoted(struct strbuf *out, const char *s, int len)
255{
256 int i;
257
258 /* just a guess, we may have to also backslash-quote */
259 strbuf_grow(out, len + 2);
260
261 strbuf_addch(out, '"');
262 for (i = 0; i < len; i++) {
263 switch (s[i]) {
264 case '"':
265 case '\\':
266 strbuf_addch(out, '\\');
267 /* fall through */
268 default:
269 strbuf_addch(out, s[i]);
270 }
271 }
272 strbuf_addch(out, '"');
273}
274
0fcec2ce
JS
275enum rfc2047_type {
276 RFC2047_SUBJECT,
277 RFC2047_ADDRESS,
278};
279
280static int is_rfc2047_special(char ch, enum rfc2047_type type)
93fc05eb 281{
0fcec2ce
JS
282 /*
283 * rfc2047, section 4.2:
284 *
285 * 8-bit values which correspond to printable ASCII characters other
286 * than "=", "?", and "_" (underscore), MAY be represented as those
287 * characters. (But see section 5 for restrictions.) In
288 * particular, SPACE and TAB MUST NOT be represented as themselves
289 * within encoded words.
290 */
291
292 /*
293 * rule out non-ASCII characters and non-printable characters (the
294 * non-ASCII check should be redundant as isprint() is not localized
295 * and only knows about ASCII, but be defensive about that)
296 */
297 if (non_ascii(ch) || !isprint(ch))
298 return 1;
299
300 /*
301 * rule out special printable characters (' ' should be the only
302 * whitespace character considered printable, but be defensive and use
303 * isspace())
304 */
305 if (isspace(ch) || ch == '=' || ch == '?' || ch == '_')
94f6cdf6
JS
306 return 1;
307
0fcec2ce
JS
308 /*
309 * rfc2047, section 5.3:
310 *
311 * As a replacement for a 'word' entity within a 'phrase', for example,
312 * one that precedes an address in a From, To, or Cc header. The ABNF
313 * definition for 'phrase' from RFC 822 thus becomes:
314 *
315 * phrase = 1*( encoded-word / word )
316 *
317 * In this case the set of characters that may be used in a "Q"-encoded
318 * 'encoded-word' is restricted to: <upper and lower case ASCII
319 * letters, decimal digits, "!", "*", "+", "-", "/", "=", and "_"
320 * (underscore, ASCII 95.)>. An 'encoded-word' that appears within a
321 * 'phrase' MUST be separated from any adjacent 'word', 'text' or
322 * 'special' by 'linear-white-space'.
323 */
324
325 if (type != RFC2047_ADDRESS)
326 return 0;
327
328 /* '=' and '_' are special cases and have been checked above */
329 return !(isalnum(ch) || ch == '!' || ch == '*' || ch == '+' || ch == '-' || ch == '/');
93fc05eb
JS
330}
331
41dd00ba
JS
332static int needs_rfc2047_encoding(const char *line, int len,
333 enum rfc2047_type type)
93fc05eb 334{
a1f6baa5 335 int i;
93fc05eb
JS
336
337 for (i = 0; i < len; i++) {
338 int ch = line[i];
c22e7de3 339 if (non_ascii(ch) || ch == '\n')
41dd00ba 340 return 1;
93fc05eb 341 if ((i + 1 < len) && (ch == '=' && line[i+1] == '?'))
41dd00ba 342 return 1;
93fc05eb 343 }
93fc05eb 344
41dd00ba
JS
345 return 0;
346}
347
348static void add_rfc2047(struct strbuf *sb, const char *line, int len,
349 const char *encoding, enum rfc2047_type type)
350{
351 static const int max_encoded_length = 76; /* per rfc2047 */
352 int i;
353 int line_len = last_line_length(sb);
354
93fc05eb
JS
355 strbuf_grow(sb, len * 3 + strlen(encoding) + 100);
356 strbuf_addf(sb, "=?%s?q?", encoding);
a1f6baa5
JK
357 line_len += strlen(encoding) + 5; /* 5 for =??q? */
358 for (i = 0; i < len; i++) {
93fc05eb 359 unsigned ch = line[i] & 0xFF;
0fcec2ce 360 int is_special = is_rfc2047_special(ch, type);
94f6cdf6
JS
361
362 /*
363 * According to RFC 2047, we could encode the special character
364 * ' ' (space) with '_' (underscore) for readability. But many
365 * programs do not understand this and just leave the
366 * underscore in place. Thus, we do nothing special here, which
367 * causes ' ' to be encoded as '=20', avoiding this problem.
368 */
a1f6baa5 369
94f6cdf6 370 if (line_len + 2 + (is_special ? 3 : 1) > max_encoded_length) {
a1f6baa5
JK
371 strbuf_addf(sb, "?=\n =?%s?q?", encoding);
372 line_len = strlen(encoding) + 5 + 1; /* =??q? plus SP */
373 }
374
94f6cdf6 375 if (is_special) {
93fc05eb 376 strbuf_addf(sb, "=%02X", ch);
a1f6baa5 377 line_len += 3;
94f6cdf6 378 } else {
a1f6baa5
JK
379 strbuf_addch(sb, ch);
380 line_len++;
93fc05eb
JS
381 }
382 }
93fc05eb
JS
383 strbuf_addstr(sb, "?=");
384}
385
6bf13944
JK
386void pp_user_info(const struct pretty_print_context *pp,
387 const char *what, struct strbuf *sb,
388 const char *line, const char *encoding)
93fc05eb 389{
41dd00ba 390 int max_length = 78; /* per rfc2822 */
93fc05eb
JS
391 char *date;
392 int namelen;
393 unsigned long time;
394 int tz;
93fc05eb 395
6bf13944 396 if (pp->fmt == CMIT_FMT_ONELINE)
93fc05eb
JS
397 return;
398 date = strchr(line, '>');
399 if (!date)
400 return;
401 namelen = ++date - line;
402 time = strtoul(date, &date, 10);
403 tz = strtol(date, NULL, 10);
404
6bf13944 405 if (pp->fmt == CMIT_FMT_EMAIL) {
93fc05eb
JS
406 char *name_tail = strchr(line, '<');
407 int display_name_length;
408 if (!name_tail)
409 return;
410 while (line < name_tail && isspace(name_tail[-1]))
411 name_tail--;
412 display_name_length = name_tail - line;
93fc05eb 413 strbuf_addstr(sb, "From: ");
41dd00ba 414 if (needs_rfc2047_encoding(line, display_name_length, RFC2047_ADDRESS)) {
0fcec2ce
JS
415 add_rfc2047(sb, line, display_name_length,
416 encoding, RFC2047_ADDRESS);
41dd00ba
JS
417 max_length = 76; /* per rfc2047 */
418 } else if (needs_rfc822_quoting(line, display_name_length)) {
4d03c18a
JK
419 struct strbuf quoted = STRBUF_INIT;
420 add_rfc822_quoted(&quoted, line, display_name_length);
41dd00ba
JS
421 strbuf_add_wrapped_bytes(sb, quoted.buf, quoted.len,
422 -6, 1, max_length);
4d03c18a 423 strbuf_release(&quoted);
41dd00ba
JS
424 } else {
425 strbuf_add_wrapped_bytes(sb, line, display_name_length,
426 -6, 1, max_length);
4d03c18a 427 }
41dd00ba 428 if (namelen - display_name_length + last_line_length(sb) > max_length) {
990f6e30
JK
429 strbuf_addch(sb, '\n');
430 if (!isspace(name_tail[0]))
431 strbuf_addch(sb, ' ');
432 }
93fc05eb
JS
433 strbuf_add(sb, name_tail, namelen - display_name_length);
434 strbuf_addch(sb, '\n');
435 } else {
436 strbuf_addf(sb, "%s: %.*s%.*s\n", what,
6bf13944 437 (pp->fmt == CMIT_FMT_FULLER) ? 4 : 0,
8e76bf3f 438 " ", namelen, line);
93fc05eb 439 }
6bf13944 440 switch (pp->fmt) {
93fc05eb 441 case CMIT_FMT_MEDIUM:
6bf13944 442 strbuf_addf(sb, "Date: %s\n", show_date(time, tz, pp->date_mode));
93fc05eb
JS
443 break;
444 case CMIT_FMT_EMAIL:
445 strbuf_addf(sb, "Date: %s\n", show_date(time, tz, DATE_RFC2822));
446 break;
447 case CMIT_FMT_FULLER:
6bf13944 448 strbuf_addf(sb, "%sDate: %s\n", what, show_date(time, tz, pp->date_mode));
93fc05eb
JS
449 break;
450 default:
451 /* notin' */
452 break;
453 }
454}
455
456static int is_empty_line(const char *line, int *len_p)
457{
458 int len = *len_p;
459 while (len && isspace(line[len-1]))
460 len--;
461 *len_p = len;
462 return !len;
463}
464
a0109668
RS
465static const char *skip_empty_lines(const char *msg)
466{
467 for (;;) {
468 int linelen = get_one_line(msg);
469 int ll = linelen;
470 if (!linelen)
471 break;
472 if (!is_empty_line(msg, &ll))
473 break;
474 msg += linelen;
475 }
476 return msg;
477}
478
6bf13944
JK
479static void add_merge_info(const struct pretty_print_context *pp,
480 struct strbuf *sb, const struct commit *commit)
93fc05eb
JS
481{
482 struct commit_list *parent = commit->parents;
483
6bf13944 484 if ((pp->fmt == CMIT_FMT_ONELINE) || (pp->fmt == CMIT_FMT_EMAIL) ||
93fc05eb
JS
485 !parent || !parent->next)
486 return;
487
488 strbuf_addstr(sb, "Merge:");
489
490 while (parent) {
491 struct commit *p = parent->item;
492 const char *hex = NULL;
6bf13944
JK
493 if (pp->abbrev)
494 hex = find_unique_abbrev(p->object.sha1, pp->abbrev);
93fc05eb
JS
495 if (!hex)
496 hex = sha1_to_hex(p->object.sha1);
93fc05eb
JS
497 parent = parent->next;
498
7fcda920 499 strbuf_addf(sb, " %s", hex);
93fc05eb
JS
500 }
501 strbuf_addch(sb, '\n');
502}
503
504static char *get_header(const struct commit *commit, const char *key)
505{
506 int key_len = strlen(key);
507 const char *line = commit->buffer;
508
a9c7a8a8 509 while (line) {
93fc05eb
JS
510 const char *eol = strchr(line, '\n'), *next;
511
512 if (line == eol)
513 return NULL;
514 if (!eol) {
a9c7a8a8
JK
515 warning("malformed commit (header is missing newline): %s",
516 sha1_to_hex(commit->object.sha1));
93fc05eb
JS
517 eol = line + strlen(line);
518 next = NULL;
519 } else
520 next = eol + 1;
521 if (eol - line > key_len &&
522 !strncmp(line, key, key_len) &&
523 line[key_len] == ' ') {
524 return xmemdupz(line + key_len + 1, eol - line - key_len - 1);
525 }
526 line = next;
527 }
a9c7a8a8 528 return NULL;
93fc05eb
JS
529}
530
531static char *replace_encoding_header(char *buf, const char *encoding)
532{
f285a2d7 533 struct strbuf tmp = STRBUF_INIT;
93fc05eb
JS
534 size_t start, len;
535 char *cp = buf;
536
537 /* guess if there is an encoding header before a \n\n */
538 while (strncmp(cp, "encoding ", strlen("encoding "))) {
539 cp = strchr(cp, '\n');
540 if (!cp || *++cp == '\n')
541 return buf;
542 }
543 start = cp - buf;
544 cp = strchr(cp, '\n');
545 if (!cp)
546 return buf; /* should not happen but be defensive */
547 len = cp + 1 - (buf + start);
548
93fc05eb
JS
549 strbuf_attach(&tmp, buf, strlen(buf), strlen(buf) + 1);
550 if (is_encoding_utf8(encoding)) {
551 /* we have re-coded to UTF-8; drop the header */
552 strbuf_remove(&tmp, start, len);
553 } else {
554 /* just replaces XXXX in 'encoding XXXX\n' */
555 strbuf_splice(&tmp, start + strlen("encoding "),
556 len - strlen("encoding \n"),
557 encoding, strlen(encoding));
558 }
559 return strbuf_detach(&tmp, NULL);
560}
561
177b29dc
PN
562char *logmsg_reencode(const struct commit *commit,
563 const char *output_encoding)
93fc05eb 564{
330db18c 565 static const char *utf8 = "UTF-8";
93fc05eb
JS
566 const char *use_encoding;
567 char *encoding;
568 char *out;
569
570 if (!*output_encoding)
571 return NULL;
572 encoding = get_header(commit, "encoding");
573 use_encoding = encoding ? encoding : utf8;
0e18bcd5 574 if (same_encoding(use_encoding, output_encoding))
93fc05eb
JS
575 if (encoding) /* we'll strip encoding header later */
576 out = xstrdup(commit->buffer);
577 else
578 return NULL; /* nothing to do */
579 else
580 out = reencode_string(commit->buffer,
581 output_encoding, use_encoding);
582 if (out)
583 out = replace_encoding_header(out, output_encoding);
584
585 free(encoding);
586 return out;
587}
588
d20d654f 589static int mailmap_name(char *email, int email_len, char *name, int name_len)
e0cbc397 590{
c455c87c 591 static struct string_list *mail_map;
e0cbc397
JS
592 if (!mail_map) {
593 mail_map = xcalloc(1, sizeof(*mail_map));
d551a488 594 read_mailmap(mail_map, NULL);
e0cbc397 595 }
d20d654f 596 return mail_map->nr && map_user(mail_map, email, email_len, name, name_len);
e0cbc397
JS
597}
598
c3a670de 599static size_t format_person_part(struct strbuf *sb, char part,
d36f8679 600 const char *msg, int len, enum date_mode dmode)
93fc05eb 601{
c3a670de
MC
602 /* currently all placeholders have same length */
603 const int placeholder_len = 2;
4b340cfa 604 int tz;
c3a670de 605 unsigned long date = 0;
d20d654f
MSO
606 char person_name[1024];
607 char person_mail[1024];
4b340cfa
JH
608 struct ident_split s;
609 const char *name_start, *name_end, *mail_start, *mail_end;
93fc05eb 610
4b340cfa 611 if (split_ident_line(&s, msg, len) < 0)
c3a670de
MC
612 goto skip;
613
4b340cfa
JH
614 name_start = s.name_begin;
615 name_end = s.name_end;
616 mail_start = s.mail_begin;
617 mail_end = s.mail_end;
d20d654f
MSO
618
619 if (part == 'N' || part == 'E') { /* mailmap lookup */
c9b4e9e5
JK
620 snprintf(person_name, sizeof(person_name), "%.*s",
621 (int)(name_end - name_start), name_start);
622 snprintf(person_mail, sizeof(person_mail), "%.*s",
623 (int)(mail_end - mail_start), mail_start);
d20d654f
MSO
624 mailmap_name(person_mail, sizeof(person_mail), person_name, sizeof(person_name));
625 name_start = person_name;
626 name_end = name_start + strlen(person_name);
627 mail_start = person_mail;
628 mail_end = mail_start + strlen(person_mail);
629 }
e0cbc397 630 if (part == 'n' || part == 'N') { /* name */
d20d654f 631 strbuf_add(sb, name_start, name_end-name_start);
c3a670de 632 return placeholder_len;
cde75e59 633 }
d20d654f
MSO
634 if (part == 'e' || part == 'E') { /* email */
635 strbuf_add(sb, mail_start, mail_end-mail_start);
c3a670de 636 return placeholder_len;
cde75e59 637 }
93fc05eb 638
4b340cfa 639 if (!s.date_begin)
c3a670de 640 goto skip;
93fc05eb 641
4b340cfa
JH
642 date = strtoul(s.date_begin, NULL, 10);
643
cde75e59 644 if (part == 't') { /* date, UNIX timestamp */
4b340cfa 645 strbuf_add(sb, s.date_begin, s.date_end - s.date_begin);
c3a670de 646 return placeholder_len;
cde75e59 647 }
93fc05eb
JS
648
649 /* parse tz */
4b340cfa
JH
650 tz = strtoul(s.tz_begin + 1, NULL, 10);
651 if (*s.tz_begin == '-')
652 tz = -tz;
93fc05eb 653
cde75e59
RS
654 switch (part) {
655 case 'd': /* date */
d36f8679 656 strbuf_addstr(sb, show_date(date, tz, dmode));
c3a670de 657 return placeholder_len;
cde75e59
RS
658 case 'D': /* date, RFC2822 style */
659 strbuf_addstr(sb, show_date(date, tz, DATE_RFC2822));
c3a670de 660 return placeholder_len;
cde75e59
RS
661 case 'r': /* date, relative */
662 strbuf_addstr(sb, show_date(date, tz, DATE_RELATIVE));
c3a670de 663 return placeholder_len;
cde75e59
RS
664 case 'i': /* date, ISO 8601 */
665 strbuf_addstr(sb, show_date(date, tz, DATE_ISO8601));
c3a670de 666 return placeholder_len;
cde75e59 667 }
c3a670de
MC
668
669skip:
670 /*
4b340cfa
JH
671 * reading from either a bogus commit, or a reflog entry with
672 * %gn, %ge, etc.; 'sb' cannot be updated, but we still need
673 * to compute a valid return value.
c3a670de
MC
674 */
675 if (part == 'n' || part == 'e' || part == 't' || part == 'd'
676 || part == 'D' || part == 'r' || part == 'i')
677 return placeholder_len;
678
679 return 0; /* unknown placeholder */
93fc05eb
JS
680}
681
f29d5958
RS
682struct chunk {
683 size_t off;
684 size_t len;
685};
686
687struct format_commit_context {
688 const struct commit *commit;
dd2e794a 689 const struct pretty_print_context *pretty_ctx;
f53bd743
RS
690 unsigned commit_header_parsed:1;
691 unsigned commit_message_parsed:1;
f6667c5e
JH
692 unsigned commit_signature_parsed:1;
693 struct {
694 char *gpg_output;
695 char good_bad;
696 char *signer;
697 } signature;
177b29dc 698 char *message;
02edd56b 699 size_t width, indent1, indent2;
f29d5958
RS
700
701 /* These offsets are relative to the start of the commit message. */
f29d5958
RS
702 struct chunk author;
703 struct chunk committer;
704 struct chunk encoding;
f53bd743
RS
705 size_t message_off;
706 size_t subject_off;
f29d5958 707 size_t body_off;
b9c62321
RS
708
709 /* The following ones are relative to the result struct strbuf. */
710 struct chunk abbrev_commit_hash;
711 struct chunk abbrev_tree_hash;
712 struct chunk abbrev_parent_hashes;
02edd56b 713 size_t wrap_start;
f29d5958
RS
714};
715
b9c62321
RS
716static int add_again(struct strbuf *sb, struct chunk *chunk)
717{
718 if (chunk->len) {
719 strbuf_adddup(sb, chunk->off, chunk->len);
720 return 1;
721 }
722
723 /*
724 * We haven't seen this chunk before. Our caller is surely
725 * going to add it the hard way now. Remember the most likely
726 * start of the to-be-added chunk: the current end of the
727 * struct strbuf.
728 */
729 chunk->off = sb->len;
730 return 0;
731}
732
f29d5958 733static void parse_commit_header(struct format_commit_context *context)
93fc05eb 734{
177b29dc 735 const char *msg = context->message;
93fc05eb 736 int i;
f29d5958 737
f53bd743 738 for (i = 0; msg[i]; i++) {
f29d5958
RS
739 int eol;
740 for (eol = i; msg[eol] && msg[eol] != '\n'; eol++)
741 ; /* do nothing */
742
f29d5958 743 if (i == eol) {
f53bd743 744 break;
f29d5958
RS
745 } else if (!prefixcmp(msg + i, "author ")) {
746 context->author.off = i + 7;
747 context->author.len = eol - i - 7;
748 } else if (!prefixcmp(msg + i, "committer ")) {
749 context->committer.off = i + 10;
750 context->committer.len = eol - i - 10;
751 } else if (!prefixcmp(msg + i, "encoding ")) {
752 context->encoding.off = i + 9;
753 context->encoding.len = eol - i - 9;
754 }
755 i = eol;
756 }
f53bd743 757 context->message_off = i;
f29d5958
RS
758 context->commit_header_parsed = 1;
759}
760
46d164b0
SB
761static int istitlechar(char c)
762{
763 return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') ||
764 (c >= '0' && c <= '9') || c == '.' || c == '_';
765}
766
767static void format_sanitized_subject(struct strbuf *sb, const char *msg)
768{
769 size_t trimlen;
871d21d4 770 size_t start_len = sb->len;
46d164b0
SB
771 int space = 2;
772
773 for (; *msg && *msg != '\n'; msg++) {
774 if (istitlechar(*msg)) {
775 if (space == 1)
776 strbuf_addch(sb, '-');
777 space = 0;
778 strbuf_addch(sb, *msg);
779 if (*msg == '.')
780 while (*(msg+1) == '.')
781 msg++;
782 } else
783 space |= 1;
784 }
785
786 /* trim any trailing '.' or '-' characters */
787 trimlen = 0;
871d21d4
SB
788 while (sb->len - trimlen > start_len &&
789 (sb->buf[sb->len - 1 - trimlen] == '.'
790 || sb->buf[sb->len - 1 - trimlen] == '-'))
46d164b0
SB
791 trimlen++;
792 strbuf_remove(sb, sb->len - trimlen, trimlen);
793}
794
cec08717
RS
795const char *format_subject(struct strbuf *sb, const char *msg,
796 const char *line_separator)
88c44735
RS
797{
798 int first = 1;
799
800 for (;;) {
801 const char *line = msg;
802 int linelen = get_one_line(line);
803
804 msg += linelen;
805 if (!linelen || is_empty_line(line, &linelen))
806 break;
807
f53bd743
RS
808 if (!sb)
809 continue;
88c44735
RS
810 strbuf_grow(sb, linelen + 2);
811 if (!first)
812 strbuf_addstr(sb, line_separator);
813 strbuf_add(sb, line, linelen);
814 first = 0;
815 }
816 return msg;
817}
818
f53bd743
RS
819static void parse_commit_message(struct format_commit_context *c)
820{
177b29dc
PN
821 const char *msg = c->message + c->message_off;
822 const char *start = c->message;
f53bd743
RS
823
824 msg = skip_empty_lines(msg);
825 c->subject_off = msg - start;
826
827 msg = format_subject(NULL, msg, NULL);
828 msg = skip_empty_lines(msg);
829 c->body_off = msg - start;
830
831 c->commit_message_parsed = 1;
832}
833
3b3d443f
RS
834static void format_decoration(struct strbuf *sb, const struct commit *commit)
835{
836 struct name_decoration *d;
837 const char *prefix = " (";
838
33e7018c 839 load_ref_decorations(DECORATE_SHORT_REFS);
3b3d443f
RS
840 d = lookup_decoration(&name_decoration, &commit->object);
841 while (d) {
842 strbuf_addstr(sb, prefix);
843 prefix = ", ";
844 strbuf_addstr(sb, d->name);
845 d = d->next;
846 }
847 if (prefix[0] == ',')
848 strbuf_addch(sb, ')');
849}
850
02edd56b
RS
851static void strbuf_wrap(struct strbuf *sb, size_t pos,
852 size_t width, size_t indent1, size_t indent2)
853{
854 struct strbuf tmp = STRBUF_INIT;
855
856 if (pos)
857 strbuf_add(&tmp, sb->buf, pos);
858 strbuf_add_wrapped_text(&tmp, sb->buf + pos,
859 (int) indent1, (int) indent2, (int) width);
860 strbuf_swap(&tmp, sb);
861 strbuf_release(&tmp);
862}
863
864static void rewrap_message_tail(struct strbuf *sb,
865 struct format_commit_context *c,
866 size_t new_width, size_t new_indent1,
867 size_t new_indent2)
868{
869 if (c->width == new_width && c->indent1 == new_indent1 &&
870 c->indent2 == new_indent2)
871 return;
32ca4249 872 if (c->wrap_start < sb->len)
02edd56b
RS
873 strbuf_wrap(sb, c->wrap_start, c->width, c->indent1, c->indent2);
874 c->wrap_start = sb->len;
875 c->width = new_width;
876 c->indent1 = new_indent1;
877 c->indent2 = new_indent2;
878}
879
f6667c5e
JH
880static struct {
881 char result;
882 const char *check;
883} signature_check[] = {
884 { 'G', ": Good signature from " },
885 { 'B', ": BAD signature from " },
886};
887
888static void parse_signature_lines(struct format_commit_context *ctx)
889{
890 const char *buf = ctx->signature.gpg_output;
891 int i;
892
893 for (i = 0; i < ARRAY_SIZE(signature_check); i++) {
894 const char *found = strstr(buf, signature_check[i].check);
895 const char *next;
896 if (!found)
897 continue;
898 ctx->signature.good_bad = signature_check[i].result;
899 found += strlen(signature_check[i].check);
900 next = strchrnul(found, '\n');
901 ctx->signature.signer = xmemdupz(found, next - found);
902 break;
903 }
904}
905
906static void parse_commit_signature(struct format_commit_context *ctx)
907{
908 struct strbuf payload = STRBUF_INIT;
909 struct strbuf signature = STRBUF_INIT;
910 struct strbuf gpg_output = STRBUF_INIT;
911 int status;
912
913 ctx->commit_signature_parsed = 1;
914
915 if (parse_signed_commit(ctx->commit->object.sha1,
916 &payload, &signature) <= 0)
917 goto out;
918 status = verify_signed_buffer(payload.buf, payload.len,
919 signature.buf, signature.len,
920 &gpg_output);
921 if (status && !gpg_output.len)
922 goto out;
923 ctx->signature.gpg_output = strbuf_detach(&gpg_output, NULL);
924 parse_signature_lines(ctx);
925
926 out:
927 strbuf_release(&gpg_output);
928 strbuf_release(&payload);
929 strbuf_release(&signature);
930}
931
932
cd1957f5
JK
933static int format_reflog_person(struct strbuf *sb,
934 char part,
935 struct reflog_walk_info *log,
936 enum date_mode dmode)
937{
938 const char *ident;
939
940 if (!log)
941 return 2;
942
943 ident = get_reflog_ident(log);
944 if (!ident)
945 return 2;
946
947 return format_person_part(sb, part, ident, strlen(ident), dmode);
948}
949
9fa708da
JH
950static size_t format_commit_one(struct strbuf *sb, const char *placeholder,
951 void *context)
f29d5958
RS
952{
953 struct format_commit_context *c = context;
954 const struct commit *commit = c->commit;
177b29dc 955 const char *msg = c->message;
f29d5958 956 struct commit_list *p;
42c8c74c 957 int h1, h2;
93fc05eb 958
93fc05eb 959 /* these are independent of the commit */
cde75e59
RS
960 switch (placeholder[0]) {
961 case 'C':
c002922a
JK
962 if (placeholder[1] == '(') {
963 const char *end = strchr(placeholder + 2, ')');
964 char color[COLOR_MAXLEN];
965 if (!end)
966 return 0;
967 color_parse_mem(placeholder + 2,
968 end - (placeholder + 2),
969 "--pretty format", color);
970 strbuf_addstr(sb, color);
971 return end - placeholder + 1;
972 }
c3a670de 973 if (!prefixcmp(placeholder + 1, "red")) {
dc6ebd4c 974 strbuf_addstr(sb, GIT_COLOR_RED);
c3a670de
MC
975 return 4;
976 } else if (!prefixcmp(placeholder + 1, "green")) {
dc6ebd4c 977 strbuf_addstr(sb, GIT_COLOR_GREEN);
c3a670de
MC
978 return 6;
979 } else if (!prefixcmp(placeholder + 1, "blue")) {
dc6ebd4c 980 strbuf_addstr(sb, GIT_COLOR_BLUE);
c3a670de
MC
981 return 5;
982 } else if (!prefixcmp(placeholder + 1, "reset")) {
dc6ebd4c 983 strbuf_addstr(sb, GIT_COLOR_RESET);
c3a670de
MC
984 return 6;
985 } else
986 return 0;
cde75e59
RS
987 case 'n': /* newline */
988 strbuf_addch(sb, '\n');
c3a670de 989 return 1;
42c8c74c
GS
990 case 'x':
991 /* %x00 == NUL, %x0a == LF, etc. */
992 if (0 <= (h1 = hexval_table[0xff & placeholder[1]]) &&
993 h1 <= 16 &&
994 0 <= (h2 = hexval_table[0xff & placeholder[2]]) &&
995 h2 <= 16) {
996 strbuf_addch(sb, (h1<<4)|h2);
997 return 3;
998 } else
999 return 0;
02edd56b
RS
1000 case 'w':
1001 if (placeholder[1] == '(') {
1002 unsigned long width = 0, indent1 = 0, indent2 = 0;
1003 char *next;
1004 const char *start = placeholder + 2;
1005 const char *end = strchr(start, ')');
1006 if (!end)
1007 return 0;
1008 if (end > start) {
1009 width = strtoul(start, &next, 10);
1010 if (*next == ',') {
1011 indent1 = strtoul(next + 1, &next, 10);
1012 if (*next == ',') {
1013 indent2 = strtoul(next + 1,
1014 &next, 10);
1015 }
1016 }
1017 if (*next != ')')
1018 return 0;
1019 }
1020 rewrap_message_tail(sb, c, width, indent1, indent2);
1021 return end - placeholder + 1;
1022 } else
1023 return 0;
cde75e59 1024 }
93fc05eb
JS
1025
1026 /* these depend on the commit */
1027 if (!commit->object.parsed)
1028 parse_object(commit->object.sha1);
93fc05eb 1029
cde75e59
RS
1030 switch (placeholder[0]) {
1031 case 'H': /* commit hash */
1032 strbuf_addstr(sb, sha1_to_hex(commit->object.sha1));
c3a670de 1033 return 1;
cde75e59 1034 case 'h': /* abbreviated commit hash */
b9c62321 1035 if (add_again(sb, &c->abbrev_commit_hash))
c3a670de 1036 return 1;
cde75e59 1037 strbuf_addstr(sb, find_unique_abbrev(commit->object.sha1,
c1977021 1038 c->pretty_ctx->abbrev));
b9c62321 1039 c->abbrev_commit_hash.len = sb->len - c->abbrev_commit_hash.off;
c3a670de 1040 return 1;
cde75e59
RS
1041 case 'T': /* tree hash */
1042 strbuf_addstr(sb, sha1_to_hex(commit->tree->object.sha1));
c3a670de 1043 return 1;
cde75e59 1044 case 't': /* abbreviated tree hash */
b9c62321 1045 if (add_again(sb, &c->abbrev_tree_hash))
c3a670de 1046 return 1;
cde75e59 1047 strbuf_addstr(sb, find_unique_abbrev(commit->tree->object.sha1,
c1977021 1048 c->pretty_ctx->abbrev));
b9c62321 1049 c->abbrev_tree_hash.len = sb->len - c->abbrev_tree_hash.off;
c3a670de 1050 return 1;
cde75e59
RS
1051 case 'P': /* parent hashes */
1052 for (p = commit->parents; p; p = p->next) {
1053 if (p != commit->parents)
1054 strbuf_addch(sb, ' ');
1055 strbuf_addstr(sb, sha1_to_hex(p->item->object.sha1));
1056 }
c3a670de 1057 return 1;
cde75e59 1058 case 'p': /* abbreviated parent hashes */
b9c62321 1059 if (add_again(sb, &c->abbrev_parent_hashes))
c3a670de 1060 return 1;
cde75e59
RS
1061 for (p = commit->parents; p; p = p->next) {
1062 if (p != commit->parents)
1063 strbuf_addch(sb, ' ');
1064 strbuf_addstr(sb, find_unique_abbrev(
c1977021
WP
1065 p->item->object.sha1,
1066 c->pretty_ctx->abbrev));
cde75e59 1067 }
b9c62321
RS
1068 c->abbrev_parent_hashes.len = sb->len -
1069 c->abbrev_parent_hashes.off;
c3a670de 1070 return 1;
cde75e59 1071 case 'm': /* left/right/bottom */
1df2d656 1072 strbuf_addstr(sb, get_revision_mark(NULL, commit));
c3a670de 1073 return 1;
3b3d443f
RS
1074 case 'd':
1075 format_decoration(sb, commit);
1076 return 1;
8f8f5476
TR
1077 case 'g': /* reflog info */
1078 switch(placeholder[1]) {
1079 case 'd': /* reflog selector */
1080 case 'D':
1081 if (c->pretty_ctx->reflog_info)
1082 get_reflog_selector(sb,
1083 c->pretty_ctx->reflog_info,
1084 c->pretty_ctx->date_mode,
55ccf85a 1085 c->pretty_ctx->date_mode_explicit,
8f8f5476
TR
1086 (placeholder[1] == 'd'));
1087 return 2;
1088 case 's': /* reflog message */
1089 if (c->pretty_ctx->reflog_info)
1090 get_reflog_message(sb, c->pretty_ctx->reflog_info);
1091 return 2;
cd1957f5
JK
1092 case 'n':
1093 case 'N':
1094 case 'e':
1095 case 'E':
1096 return format_reflog_person(sb,
1097 placeholder[1],
1098 c->pretty_ctx->reflog_info,
1099 c->pretty_ctx->date_mode);
8f8f5476
TR
1100 }
1101 return 0; /* unknown %g placeholder */
8b208f02 1102 case 'N':
ddf333f6
JH
1103 if (c->pretty_ctx->notes_message) {
1104 strbuf_addstr(sb, c->pretty_ctx->notes_message);
5b163603
JG
1105 return 1;
1106 }
1107 return 0;
cde75e59
RS
1108 }
1109
f6667c5e
JH
1110 if (placeholder[0] == 'G') {
1111 if (!c->commit_signature_parsed)
1112 parse_commit_signature(c);
1113 switch (placeholder[1]) {
1114 case 'G':
1115 if (c->signature.gpg_output)
1116 strbuf_addstr(sb, c->signature.gpg_output);
1117 break;
1118 case '?':
1119 switch (c->signature.good_bad) {
1120 case 'G':
1121 case 'B':
1122 strbuf_addch(sb, c->signature.good_bad);
1123 }
1124 break;
1125 case 'S':
1126 if (c->signature.signer)
1127 strbuf_addstr(sb, c->signature.signer);
1128 break;
1129 }
1130 return 2;
1131 }
1132
1133
cde75e59 1134 /* For the rest we have to parse the commit header. */
f29d5958
RS
1135 if (!c->commit_header_parsed)
1136 parse_commit_header(c);
93fc05eb 1137
f29d5958 1138 switch (placeholder[0]) {
c3a670de
MC
1139 case 'a': /* author ... */
1140 return format_person_part(sb, placeholder[1],
d36f8679 1141 msg + c->author.off, c->author.len,
dd2e794a 1142 c->pretty_ctx->date_mode);
c3a670de
MC
1143 case 'c': /* committer ... */
1144 return format_person_part(sb, placeholder[1],
d36f8679 1145 msg + c->committer.off, c->committer.len,
dd2e794a 1146 c->pretty_ctx->date_mode);
c3a670de 1147 case 'e': /* encoding */
f29d5958 1148 strbuf_add(sb, msg + c->encoding.off, c->encoding.len);
c3a670de 1149 return 1;
1367b12a
EB
1150 case 'B': /* raw body */
1151 /* message_off is always left at the initial newline */
1152 strbuf_addstr(sb, msg + c->message_off + 1);
1153 return 1;
f53bd743
RS
1154 }
1155
1156 /* Now we need to parse the commit message. */
1157 if (!c->commit_message_parsed)
1158 parse_commit_message(c);
1159
1160 switch (placeholder[0]) {
1161 case 's': /* subject */
1162 format_subject(sb, msg + c->subject_off, " ");
1163 return 1;
46d164b0
SB
1164 case 'f': /* sanitized subject */
1165 format_sanitized_subject(sb, msg + c->subject_off);
1166 return 1;
c3a670de 1167 case 'b': /* body */
f29d5958 1168 strbuf_addstr(sb, msg + c->body_off);
c3a670de 1169 return 1;
93fc05eb 1170 }
c3a670de 1171 return 0; /* unknown placeholder */
cde75e59
RS
1172}
1173
9fa708da
JH
1174static size_t format_commit_item(struct strbuf *sb, const char *placeholder,
1175 void *context)
1176{
1177 int consumed;
1178 size_t orig_len;
1179 enum {
1180 NO_MAGIC,
1181 ADD_LF_BEFORE_NON_EMPTY,
1182 DEL_LF_BEFORE_EMPTY,
223a923c 1183 ADD_SP_BEFORE_NON_EMPTY
9fa708da
JH
1184 } magic = NO_MAGIC;
1185
1186 switch (placeholder[0]) {
1187 case '-':
1188 magic = DEL_LF_BEFORE_EMPTY;
1189 break;
1190 case '+':
1191 magic = ADD_LF_BEFORE_NON_EMPTY;
1192 break;
7b88176e
MG
1193 case ' ':
1194 magic = ADD_SP_BEFORE_NON_EMPTY;
1195 break;
9fa708da
JH
1196 default:
1197 break;
1198 }
1199 if (magic != NO_MAGIC)
1200 placeholder++;
1201
1202 orig_len = sb->len;
1203 consumed = format_commit_one(sb, placeholder, context);
1204 if (magic == NO_MAGIC)
1205 return consumed;
1206
1207 if ((orig_len == sb->len) && magic == DEL_LF_BEFORE_EMPTY) {
1208 while (sb->len && sb->buf[sb->len - 1] == '\n')
1209 strbuf_setlen(sb, sb->len - 1);
7b88176e
MG
1210 } else if (orig_len != sb->len) {
1211 if (magic == ADD_LF_BEFORE_NON_EMPTY)
1212 strbuf_insert(sb, orig_len, "\n", 1);
1213 else if (magic == ADD_SP_BEFORE_NON_EMPTY)
1214 strbuf_insert(sb, orig_len, " ", 1);
9fa708da
JH
1215 }
1216 return consumed + 1;
1217}
1218
5b163603
JG
1219static size_t userformat_want_item(struct strbuf *sb, const char *placeholder,
1220 void *context)
1221{
1222 struct userformat_want *w = context;
1223
7b88176e 1224 if (*placeholder == '+' || *placeholder == '-' || *placeholder == ' ')
5b163603
JG
1225 placeholder++;
1226
1227 switch (*placeholder) {
1228 case 'N':
1229 w->notes = 1;
1230 break;
1231 }
1232 return 0;
1233}
1234
1235void userformat_find_requirements(const char *fmt, struct userformat_want *w)
1236{
1237 struct strbuf dummy = STRBUF_INIT;
1238
1239 if (!fmt) {
1240 if (!user_format)
1241 return;
1242 fmt = user_format;
1243 }
a6253d10 1244 strbuf_expand(&dummy, fmt, userformat_want_item, w);
5b163603
JG
1245 strbuf_release(&dummy);
1246}
1247
cde75e59 1248void format_commit_message(const struct commit *commit,
7f98ebc8 1249 const char *format, struct strbuf *sb,
dd2e794a 1250 const struct pretty_print_context *pretty_ctx)
cde75e59 1251{
f29d5958 1252 struct format_commit_context context;
177b29dc 1253 static const char utf8[] = "UTF-8";
177b29dc 1254 const char *output_enc = pretty_ctx->output_encoding;
f29d5958
RS
1255
1256 memset(&context, 0, sizeof(context));
1257 context.commit = commit;
dd2e794a 1258 context.pretty_ctx = pretty_ctx;
02edd56b 1259 context.wrap_start = sb->len;
177b29dc
PN
1260 context.message = commit->buffer;
1261 if (output_enc) {
9cd7a92b 1262 char *enc = get_header(commit, "encoding");
1d5bd615 1263 if (strcmp(enc ? enc : utf8, output_enc)) {
177b29dc 1264 context.message = logmsg_reencode(commit, output_enc);
1d5bd615
NTND
1265 if (!context.message)
1266 context.message = commit->buffer;
1267 }
9cd7a92b 1268 free(enc);
177b29dc
PN
1269 }
1270
c3a670de 1271 strbuf_expand(sb, format, format_commit_item, &context);
02edd56b 1272 rewrap_message_tail(sb, &context, 0, 0, 0);
177b29dc
PN
1273
1274 if (context.message != commit->buffer)
1275 free(context.message);
f6667c5e
JH
1276 free(context.signature.gpg_output);
1277 free(context.signature.signer);
93fc05eb
JS
1278}
1279
6bf13944 1280static void pp_header(const struct pretty_print_context *pp,
93fc05eb
JS
1281 const char *encoding,
1282 const struct commit *commit,
1283 const char **msg_p,
1284 struct strbuf *sb)
1285{
1286 int parents_shown = 0;
1287
1288 for (;;) {
1289 const char *line = *msg_p;
1290 int linelen = get_one_line(*msg_p);
1291
1292 if (!linelen)
1293 return;
1294 *msg_p += linelen;
1295
1296 if (linelen == 1)
1297 /* End of header */
1298 return;
1299
6bf13944 1300 if (pp->fmt == CMIT_FMT_RAW) {
93fc05eb
JS
1301 strbuf_add(sb, line, linelen);
1302 continue;
1303 }
1304
1305 if (!memcmp(line, "parent ", 7)) {
1306 if (linelen != 48)
1307 die("bad parent line in commit");
1308 continue;
1309 }
1310
1311 if (!parents_shown) {
1312 struct commit_list *parent;
1313 int num;
1314 for (parent = commit->parents, num = 0;
1315 parent;
1316 parent = parent->next, num++)
1317 ;
1318 /* with enough slop */
1319 strbuf_grow(sb, num * 50 + 20);
6bf13944 1320 add_merge_info(pp, sb, commit);
93fc05eb
JS
1321 parents_shown = 1;
1322 }
1323
1324 /*
1325 * MEDIUM == DEFAULT shows only author with dates.
1326 * FULL shows both authors but not dates.
1327 * FULLER shows both authors and dates.
1328 */
1329 if (!memcmp(line, "author ", 7)) {
1330 strbuf_grow(sb, linelen + 80);
6bf13944 1331 pp_user_info(pp, "Author", sb, line + 7, encoding);
93fc05eb
JS
1332 }
1333 if (!memcmp(line, "committer ", 10) &&
6bf13944 1334 (pp->fmt == CMIT_FMT_FULL || pp->fmt == CMIT_FMT_FULLER)) {
93fc05eb 1335 strbuf_grow(sb, linelen + 80);
6bf13944 1336 pp_user_info(pp, "Commit", sb, line + 10, encoding);
93fc05eb
JS
1337 }
1338 }
1339}
1340
6bf13944 1341void pp_title_line(const struct pretty_print_context *pp,
b02bd65f
DB
1342 const char **msg_p,
1343 struct strbuf *sb,
b02bd65f 1344 const char *encoding,
267123b4 1345 int need_8bit_cte)
93fc05eb 1346{
41dd00ba 1347 static const int max_length = 78; /* per rfc2047 */
93fc05eb
JS
1348 struct strbuf title;
1349
1350 strbuf_init(&title, 80);
9553d2b2
JK
1351 *msg_p = format_subject(&title, *msg_p,
1352 pp->preserve_subject ? "\n" : " ");
93fc05eb
JS
1353
1354 strbuf_grow(sb, title.len + 1024);
6bf13944
JK
1355 if (pp->subject) {
1356 strbuf_addstr(sb, pp->subject);
41dd00ba
JS
1357 if (needs_rfc2047_encoding(title.buf, title.len, RFC2047_SUBJECT))
1358 add_rfc2047(sb, title.buf, title.len,
1359 encoding, RFC2047_SUBJECT);
1360 else
1361 strbuf_add_wrapped_bytes(sb, title.buf, title.len,
1362 -last_line_length(sb), 1, max_length);
93fc05eb
JS
1363 } else {
1364 strbuf_addbuf(sb, &title);
1365 }
1366 strbuf_addch(sb, '\n');
1367
6bf4f1b4 1368 if (need_8bit_cte > 0) {
93fc05eb
JS
1369 const char *header_fmt =
1370 "MIME-Version: 1.0\n"
1371 "Content-Type: text/plain; charset=%s\n"
1372 "Content-Transfer-Encoding: 8bit\n";
1373 strbuf_addf(sb, header_fmt, encoding);
1374 }
6bf13944
JK
1375 if (pp->after_subject) {
1376 strbuf_addstr(sb, pp->after_subject);
93fc05eb 1377 }
6bf13944 1378 if (pp->fmt == CMIT_FMT_EMAIL) {
93fc05eb
JS
1379 strbuf_addch(sb, '\n');
1380 }
1381 strbuf_release(&title);
1382}
1383
6bf13944 1384void pp_remainder(const struct pretty_print_context *pp,
b02bd65f
DB
1385 const char **msg_p,
1386 struct strbuf *sb,
1387 int indent)
93fc05eb
JS
1388{
1389 int first = 1;
1390 for (;;) {
1391 const char *line = *msg_p;
1392 int linelen = get_one_line(line);
1393 *msg_p += linelen;
1394
1395 if (!linelen)
1396 break;
1397
1398 if (is_empty_line(line, &linelen)) {
1399 if (first)
1400 continue;
6bf13944 1401 if (pp->fmt == CMIT_FMT_SHORT)
93fc05eb
JS
1402 break;
1403 }
1404 first = 0;
1405
1406 strbuf_grow(sb, linelen + indent + 20);
1407 if (indent) {
1408 memset(sb->buf + sb->len, ' ', indent);
1409 strbuf_setlen(sb, sb->len + indent);
1410 }
1411 strbuf_add(sb, line, linelen);
1412 strbuf_addch(sb, '\n');
1413 }
1414}
1415
6bf13944
JK
1416void pretty_print_commit(const struct pretty_print_context *pp,
1417 const struct commit *commit,
1418 struct strbuf *sb)
93fc05eb
JS
1419{
1420 unsigned long beginning_of_body;
1421 int indent = 4;
1422 const char *msg = commit->buffer;
1423 char *reencoded;
1424 const char *encoding;
6bf13944 1425 int need_8bit_cte = pp->need_8bit_cte;
93fc05eb 1426
6bf13944
JK
1427 if (pp->fmt == CMIT_FMT_USERFORMAT) {
1428 format_commit_message(commit, user_format, sb, pp);
93fc05eb
JS
1429 return;
1430 }
1431
e297cf5a
JH
1432 encoding = get_log_output_encoding();
1433 reencoded = logmsg_reencode(commit, encoding);
93fc05eb
JS
1434 if (reencoded) {
1435 msg = reencoded;
1436 }
1437
6bf13944 1438 if (pp->fmt == CMIT_FMT_ONELINE || pp->fmt == CMIT_FMT_EMAIL)
93fc05eb
JS
1439 indent = 0;
1440
6bf4f1b4
JH
1441 /*
1442 * We need to check and emit Content-type: to mark it
1443 * as 8-bit if we haven't done so.
93fc05eb 1444 */
6bf13944 1445 if (pp->fmt == CMIT_FMT_EMAIL && need_8bit_cte == 0) {
93fc05eb
JS
1446 int i, ch, in_body;
1447
1448 for (in_body = i = 0; (ch = msg[i]); i++) {
1449 if (!in_body) {
1450 /* author could be non 7-bit ASCII but
1451 * the log may be so; skip over the
1452 * header part first.
1453 */
1454 if (ch == '\n' && msg[i+1] == '\n')
1455 in_body = 1;
1456 }
1457 else if (non_ascii(ch)) {
6bf4f1b4 1458 need_8bit_cte = 1;
93fc05eb
JS
1459 break;
1460 }
1461 }
1462 }
1463
6bf13944
JK
1464 pp_header(pp, encoding, commit, &msg, sb);
1465 if (pp->fmt != CMIT_FMT_ONELINE && !pp->subject) {
93fc05eb
JS
1466 strbuf_addch(sb, '\n');
1467 }
1468
1469 /* Skip excess blank lines at the beginning of body, if any... */
a0109668 1470 msg = skip_empty_lines(msg);
93fc05eb
JS
1471
1472 /* These formats treat the title line specially. */
6bf13944
JK
1473 if (pp->fmt == CMIT_FMT_ONELINE || pp->fmt == CMIT_FMT_EMAIL)
1474 pp_title_line(pp, &msg, sb, encoding, need_8bit_cte);
93fc05eb
JS
1475
1476 beginning_of_body = sb->len;
6bf13944
JK
1477 if (pp->fmt != CMIT_FMT_ONELINE)
1478 pp_remainder(pp, &msg, sb, indent);
93fc05eb
JS
1479 strbuf_rtrim(sb);
1480
1481 /* Make sure there is an EOLN for the non-oneline case */
6bf13944 1482 if (pp->fmt != CMIT_FMT_ONELINE)
93fc05eb
JS
1483 strbuf_addch(sb, '\n');
1484
1485 /*
1486 * The caller may append additional body text in e-mail
1487 * format. Make sure we did not strip the blank line
1488 * between the header and the body.
1489 */
6bf13944 1490 if (pp->fmt == CMIT_FMT_EMAIL && sb->len <= beginning_of_body)
93fc05eb 1491 strbuf_addch(sb, '\n');
a97a7468 1492
93fc05eb
JS
1493 free(reencoded);
1494}
8b8a5374
JK
1495
1496void pp_commit_easy(enum cmit_fmt fmt, const struct commit *commit,
1497 struct strbuf *sb)
1498{
1499 struct pretty_print_context pp = {0};
6bf13944
JK
1500 pp.fmt = fmt;
1501 pretty_print_commit(&pp, commit, sb);
8b8a5374 1502}