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Merge branch 'rs/commit-m-no-edit' into maint
[git/debian.git] / pretty.c
blob9e431545d8e6c14401faea5e76296974ca1d6649
1 #include "cache.h"
2 #include "commit.h"
3 #include "utf8.h"
4 #include "diff.h"
5 #include "revision.h"
6 #include "string-list.h"
7 #include "mailmap.h"
8 #include "log-tree.h"
9 #include "notes.h"
10 #include "color.h"
11 #include "reflog-walk.h"
12 #include "gpg-interface.h"
13
14 static char *user_format;
15 static struct cmt_fmt_map {
16 const char *name;
17 enum cmit_fmt format;
18 int is_tformat;
19 int is_alias;
20 const char *user_format;
21 } *commit_formats;
22 static size_t builtin_formats_len;
23 static size_t commit_formats_len;
24 static size_t commit_formats_alloc;
25 static struct cmt_fmt_map *find_commit_format(const char *sought);
26
27 static 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
36 static int git_pretty_formats_config(const char *var, const char *value, void *cb)
37 {
38 struct cmt_fmt_map *commit_format = NULL;
39 const char *name;
40 const char *fmt;
41 int i;
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];
63 memset(commit_format, 0, sizeof(*commit_format));
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
82 static void setup_commit_formats(void)
83 {
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 }
92 };
93 commit_formats_len = ARRAY_SIZE(builtin_formats);
94 builtin_formats_len = commit_formats_len;
95 ALLOC_GROW(commit_formats, commit_formats_len, commit_formats_alloc);
96 memcpy(commit_formats, builtin_formats,
97 sizeof(*builtin_formats)*ARRAY_SIZE(builtin_formats));
98
99 git_config(git_pretty_formats_config, NULL);
100 }
101
102 static struct cmt_fmt_map *find_commit_format_recursive(const char *sought,
103 const char *original,
104 int num_redirections)
105 {
106 struct cmt_fmt_map *found = NULL;
107 size_t found_match_len = 0;
108 int i;
109
110 if (num_redirections >= commit_formats_len)
111 die("invalid --pretty format: "
112 "'%s' references an alias which points to itself",
113 original);
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 }
127
128 if (found && found->is_alias) {
129 found = find_commit_format_recursive(found->user_format,
130 original,
131 num_redirections+1);
132 }
133
134 return found;
135 }
136
137 static 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
145 void get_commit_format(const char *arg, struct rev_info *rev)
146 {
147 struct cmt_fmt_map *commit_format;
148
149 rev->use_terminator = 0;
150 if (!arg || !*arg) {
151 rev->commit_format = CMIT_FMT_DEFAULT;
152 return;
153 }
154 if (!prefixcmp(arg, "format:") || !prefixcmp(arg, "tformat:")) {
155 save_user_format(rev, strchr(arg, ':') + 1, arg[0] == 't');
156 return;
157 }
158
159 if (strchr(arg, '%')) {
160 save_user_format(rev, arg, 1);
161 return;
162 }
163
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;
170 if (commit_format->format == CMIT_FMT_USERFORMAT) {
171 save_user_format(rev, commit_format->user_format,
172 commit_format->is_tformat);
173 }
174 }
175
176 /*
177 * Generic support for pretty-printing the header
178 */
179 static 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 */
195 static int non_ascii(int ch)
196 {
197 return !isascii(ch) || ch == '\033';
198 }
199
200 int 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
212 static 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
234 static int needs_rfc822_quoting(const char *s, int len)
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
243 static 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
254 static 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
275 enum rfc2047_type {
276 RFC2047_SUBJECT,
277 RFC2047_ADDRESS,
278 };
279
280 static int is_rfc2047_special(char ch, enum rfc2047_type type)
281 {
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 == '_')
306 return 1;
307
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 == '/');
330 }
331
332 static int needs_rfc2047_encoding(const char *line, int len,
333 enum rfc2047_type type)
334 {
335 int i;
336
337 for (i = 0; i < len; i++) {
338 int ch = line[i];
339 if (non_ascii(ch) || ch == '\n')
340 return 1;
341 if ((i + 1 < len) && (ch == '=' && line[i+1] == '?'))
342 return 1;
343 }
344
345 return 0;
346 }
347
348 static void add_rfc2047(struct strbuf *sb, const char *line, size_t 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
355 strbuf_grow(sb, len * 3 + strlen(encoding) + 100);
356 strbuf_addf(sb, "=?%s?q?", encoding);
357 line_len += strlen(encoding) + 5; /* 5 for =??q? */
358
359 while (len) {
360 /*
361 * RFC 2047, section 5 (3):
362 *
363 * Each 'encoded-word' MUST represent an integral number of
364 * characters. A multi-octet character may not be split across
365 * adjacent 'encoded- word's.
366 */
367 const unsigned char *p = (const unsigned char *)line;
368 int chrlen = mbs_chrlen(&line, &len, encoding);
369 int is_special = (chrlen > 1) || is_rfc2047_special(*p, type);
370
371 /* "=%02X" * chrlen, or the byte itself */
372 const char *encoded_fmt = is_special ? "=%02X" : "%c";
373 int encoded_len = is_special ? 3 * chrlen : 1;
374
375 /*
376 * According to RFC 2047, we could encode the special character
377 * ' ' (space) with '_' (underscore) for readability. But many
378 * programs do not understand this and just leave the
379 * underscore in place. Thus, we do nothing special here, which
380 * causes ' ' to be encoded as '=20', avoiding this problem.
381 */
382
383 if (line_len + encoded_len + 2 > max_encoded_length) {
384 /* It won't fit with trailing "?=" --- break the line */
385 strbuf_addf(sb, "?=\n =?%s?q?", encoding);
386 line_len = strlen(encoding) + 5 + 1; /* =??q? plus SP */
387 }
388
389 for (i = 0; i < chrlen; i++)
390 strbuf_addf(sb, encoded_fmt, p[i]);
391 line_len += encoded_len;
392 }
393 strbuf_addstr(sb, "?=");
394 }
395
396 static const char *show_ident_date(const struct ident_split *ident,
397 enum date_mode mode)
398 {
399 unsigned long date = 0;
400 int tz = 0;
401
402 if (ident->date_begin && ident->date_end)
403 date = strtoul(ident->date_begin, NULL, 10);
404 if (ident->tz_begin && ident->tz_end)
405 tz = strtol(ident->tz_begin, NULL, 10);
406 return show_date(date, tz, mode);
407 }
408
409 void pp_user_info(const struct pretty_print_context *pp,
410 const char *what, struct strbuf *sb,
411 const char *line, const char *encoding)
412 {
413 struct ident_split ident;
414 char *line_end;
415 const char *mailbuf, *namebuf;
416 size_t namelen, maillen;
417 int max_length = 78; /* per rfc2822 */
418
419 if (pp->fmt == CMIT_FMT_ONELINE)
420 return;
421
422 line_end = strchrnul(line, '\n');
423 if (split_ident_line(&ident, line, line_end - line))
424 return;
425
426 mailbuf = ident.mail_begin;
427 maillen = ident.mail_end - ident.mail_begin;
428 namebuf = ident.name_begin;
429 namelen = ident.name_end - ident.name_begin;
430
431 if (pp->mailmap)
432 map_user(pp->mailmap, &mailbuf, &maillen, &namebuf, &namelen);
433
434 if (pp->fmt == CMIT_FMT_EMAIL) {
435 strbuf_addstr(sb, "From: ");
436 if (needs_rfc2047_encoding(namebuf, namelen, RFC2047_ADDRESS)) {
437 add_rfc2047(sb, namebuf, namelen,
438 encoding, RFC2047_ADDRESS);
439 max_length = 76; /* per rfc2047 */
440 } else if (needs_rfc822_quoting(namebuf, namelen)) {
441 struct strbuf quoted = STRBUF_INIT;
442 add_rfc822_quoted(&quoted, namebuf, namelen);
443 strbuf_add_wrapped_bytes(sb, quoted.buf, quoted.len,
444 -6, 1, max_length);
445 strbuf_release(&quoted);
446 } else {
447 strbuf_add_wrapped_bytes(sb, namebuf, namelen,
448 -6, 1, max_length);
449 }
450
451 if (max_length <
452 last_line_length(sb) + strlen(" <") + maillen + strlen(">"))
453 strbuf_addch(sb, '\n');
454 strbuf_addf(sb, " <%.*s>\n", (int)maillen, mailbuf);
455 } else {
456 strbuf_addf(sb, "%s: %.*s%.*s <%.*s>\n", what,
457 (pp->fmt == CMIT_FMT_FULLER) ? 4 : 0, " ",
458 (int)namelen, namebuf, (int)maillen, mailbuf);
459 }
460
461 switch (pp->fmt) {
462 case CMIT_FMT_MEDIUM:
463 strbuf_addf(sb, "Date: %s\n",
464 show_ident_date(&ident, pp->date_mode));
465 break;
466 case CMIT_FMT_EMAIL:
467 strbuf_addf(sb, "Date: %s\n",
468 show_ident_date(&ident, DATE_RFC2822));
469 break;
470 case CMIT_FMT_FULLER:
471 strbuf_addf(sb, "%sDate: %s\n", what,
472 show_ident_date(&ident, pp->date_mode));
473 break;
474 default:
475 /* notin' */
476 break;
477 }
478 }
479
480 static int is_empty_line(const char *line, int *len_p)
481 {
482 int len = *len_p;
483 while (len && isspace(line[len-1]))
484 len--;
485 *len_p = len;
486 return !len;
487 }
488
489 static const char *skip_empty_lines(const char *msg)
490 {
491 for (;;) {
492 int linelen = get_one_line(msg);
493 int ll = linelen;
494 if (!linelen)
495 break;
496 if (!is_empty_line(msg, &ll))
497 break;
498 msg += linelen;
499 }
500 return msg;
501 }
502
503 static void add_merge_info(const struct pretty_print_context *pp,
504 struct strbuf *sb, const struct commit *commit)
505 {
506 struct commit_list *parent = commit->parents;
507
508 if ((pp->fmt == CMIT_FMT_ONELINE) || (pp->fmt == CMIT_FMT_EMAIL) ||
509 !parent || !parent->next)
510 return;
511
512 strbuf_addstr(sb, "Merge:");
513
514 while (parent) {
515 struct commit *p = parent->item;
516 const char *hex = NULL;
517 if (pp->abbrev)
518 hex = find_unique_abbrev(p->object.sha1, pp->abbrev);
519 if (!hex)
520 hex = sha1_to_hex(p->object.sha1);
521 parent = parent->next;
522
523 strbuf_addf(sb, " %s", hex);
524 }
525 strbuf_addch(sb, '\n');
526 }
527
528 static char *get_header(const struct commit *commit, const char *msg,
529 const char *key)
530 {
531 int key_len = strlen(key);
532 const char *line = msg;
533
534 while (line) {
535 const char *eol = strchr(line, '\n'), *next;
536
537 if (line == eol)
538 return NULL;
539 if (!eol) {
540 warning("malformed commit (header is missing newline): %s",
541 sha1_to_hex(commit->object.sha1));
542 eol = line + strlen(line);
543 next = NULL;
544 } else
545 next = eol + 1;
546 if (eol - line > key_len &&
547 !strncmp(line, key, key_len) &&
548 line[key_len] == ' ') {
549 return xmemdupz(line + key_len + 1, eol - line - key_len - 1);
550 }
551 line = next;
552 }
553 return NULL;
554 }
555
556 static char *replace_encoding_header(char *buf, const char *encoding)
557 {
558 struct strbuf tmp = STRBUF_INIT;
559 size_t start, len;
560 char *cp = buf;
561
562 /* guess if there is an encoding header before a \n\n */
563 while (strncmp(cp, "encoding ", strlen("encoding "))) {
564 cp = strchr(cp, '\n');
565 if (!cp || *++cp == '\n')
566 return buf;
567 }
568 start = cp - buf;
569 cp = strchr(cp, '\n');
570 if (!cp)
571 return buf; /* should not happen but be defensive */
572 len = cp + 1 - (buf + start);
573
574 strbuf_attach(&tmp, buf, strlen(buf), strlen(buf) + 1);
575 if (is_encoding_utf8(encoding)) {
576 /* we have re-coded to UTF-8; drop the header */
577 strbuf_remove(&tmp, start, len);
578 } else {
579 /* just replaces XXXX in 'encoding XXXX\n' */
580 strbuf_splice(&tmp, start + strlen("encoding "),
581 len - strlen("encoding \n"),
582 encoding, strlen(encoding));
583 }
584 return strbuf_detach(&tmp, NULL);
585 }
586
587 char *logmsg_reencode(const struct commit *commit,
588 char **commit_encoding,
589 const char *output_encoding)
590 {
591 static const char *utf8 = "UTF-8";
592 const char *use_encoding;
593 char *encoding;
594 char *msg = commit->buffer;
595 char *out;
596
597 if (!msg) {
598 enum object_type type;
599 unsigned long size;
600
601 msg = read_sha1_file(commit->object.sha1, &type, &size);
602 if (!msg)
603 die("Cannot read commit object %s",
604 sha1_to_hex(commit->object.sha1));
605 if (type != OBJ_COMMIT)
606 die("Expected commit for '%s', got %s",
607 sha1_to_hex(commit->object.sha1), typename(type));
608 }
609
610 if (!output_encoding || !*output_encoding) {
611 if (commit_encoding)
612 *commit_encoding =
613 get_header(commit, msg, "encoding");
614 return msg;
615 }
616 encoding = get_header(commit, msg, "encoding");
617 if (commit_encoding)
618 *commit_encoding = encoding;
619 use_encoding = encoding ? encoding : utf8;
620 if (same_encoding(use_encoding, output_encoding)) {
621 /*
622 * No encoding work to be done. If we have no encoding header
623 * at all, then there's nothing to do, and we can return the
624 * message verbatim (whether newly allocated or not).
625 */
626 if (!encoding)
627 return msg;
628
629 /*
630 * Otherwise, we still want to munge the encoding header in the
631 * result, which will be done by modifying the buffer. If we
632 * are using a fresh copy, we can reuse it. But if we are using
633 * the cached copy from commit->buffer, we need to duplicate it
634 * to avoid munging commit->buffer.
635 */
636 out = msg;
637 if (out == commit->buffer)
638 out = xstrdup(out);
639 }
640 else {
641 /*
642 * There's actual encoding work to do. Do the reencoding, which
643 * still leaves the header to be replaced in the next step. At
644 * this point, we are done with msg. If we allocated a fresh
645 * copy, we can free it.
646 */
647 out = reencode_string(msg, output_encoding, use_encoding);
648 if (out && msg != commit->buffer)
649 free(msg);
650 }
651
652 /*
653 * This replacement actually consumes the buffer we hand it, so we do
654 * not have to worry about freeing the old "out" here.
655 */
656 if (out)
657 out = replace_encoding_header(out, output_encoding);
658
659 if (!commit_encoding)
660 free(encoding);
661 /*
662 * If the re-encoding failed, out might be NULL here; in that
663 * case we just return the commit message verbatim.
664 */
665 return out ? out : msg;
666 }
667
668 void logmsg_free(char *msg, const struct commit *commit)
669 {
670 if (msg != commit->buffer)
671 free(msg);
672 }
673
674 static int mailmap_name(const char **email, size_t *email_len,
675 const char **name, size_t *name_len)
676 {
677 static struct string_list *mail_map;
678 if (!mail_map) {
679 mail_map = xcalloc(1, sizeof(*mail_map));
680 read_mailmap(mail_map, NULL);
681 }
682 return mail_map->nr && map_user(mail_map, email, email_len, name, name_len);
683 }
684
685 static size_t format_person_part(struct strbuf *sb, char part,
686 const char *msg, int len, enum date_mode dmode)
687 {
688 /* currently all placeholders have same length */
689 const int placeholder_len = 2;
690 struct ident_split s;
691 const char *name, *mail;
692 size_t maillen, namelen;
693
694 if (split_ident_line(&s, msg, len) < 0)
695 goto skip;
696
697 name = s.name_begin;
698 namelen = s.name_end - s.name_begin;
699 mail = s.mail_begin;
700 maillen = s.mail_end - s.mail_begin;
701
702 if (part == 'N' || part == 'E') /* mailmap lookup */
703 mailmap_name(&mail, &maillen, &name, &namelen);
704 if (part == 'n' || part == 'N') { /* name */
705 strbuf_add(sb, name, namelen);
706 return placeholder_len;
707 }
708 if (part == 'e' || part == 'E') { /* email */
709 strbuf_add(sb, mail, maillen);
710 return placeholder_len;
711 }
712
713 if (!s.date_begin)
714 goto skip;
715
716 if (part == 't') { /* date, UNIX timestamp */
717 strbuf_add(sb, s.date_begin, s.date_end - s.date_begin);
718 return placeholder_len;
719 }
720
721 switch (part) {
722 case 'd': /* date */
723 strbuf_addstr(sb, show_ident_date(&s, dmode));
724 return placeholder_len;
725 case 'D': /* date, RFC2822 style */
726 strbuf_addstr(sb, show_ident_date(&s, DATE_RFC2822));
727 return placeholder_len;
728 case 'r': /* date, relative */
729 strbuf_addstr(sb, show_ident_date(&s, DATE_RELATIVE));
730 return placeholder_len;
731 case 'i': /* date, ISO 8601 */
732 strbuf_addstr(sb, show_ident_date(&s, DATE_ISO8601));
733 return placeholder_len;
734 }
735
736 skip:
737 /*
738 * reading from either a bogus commit, or a reflog entry with
739 * %gn, %ge, etc.; 'sb' cannot be updated, but we still need
740 * to compute a valid return value.
741 */
742 if (part == 'n' || part == 'e' || part == 't' || part == 'd'
743 || part == 'D' || part == 'r' || part == 'i')
744 return placeholder_len;
745
746 return 0; /* unknown placeholder */
747 }
748
749 struct chunk {
750 size_t off;
751 size_t len;
752 };
753
754 enum flush_type {
755 no_flush,
756 flush_right,
757 flush_left,
758 flush_left_and_steal,
759 flush_both
760 };
761
762 enum trunc_type {
763 trunc_none,
764 trunc_left,
765 trunc_middle,
766 trunc_right
767 };
768
769 struct format_commit_context {
770 const struct commit *commit;
771 const struct pretty_print_context *pretty_ctx;
772 unsigned commit_header_parsed:1;
773 unsigned commit_message_parsed:1;
774 struct signature_check signature_check;
775 enum flush_type flush_type;
776 enum trunc_type truncate;
777 char *message;
778 char *commit_encoding;
779 size_t width, indent1, indent2;
780 int auto_color;
781 int padding;
782
783 /* These offsets are relative to the start of the commit message. */
784 struct chunk author;
785 struct chunk committer;
786 size_t message_off;
787 size_t subject_off;
788 size_t body_off;
789
790 /* The following ones are relative to the result struct strbuf. */
791 struct chunk abbrev_commit_hash;
792 struct chunk abbrev_tree_hash;
793 struct chunk abbrev_parent_hashes;
794 size_t wrap_start;
795 };
796
797 static int add_again(struct strbuf *sb, struct chunk *chunk)
798 {
799 if (chunk->len) {
800 strbuf_adddup(sb, chunk->off, chunk->len);
801 return 1;
802 }
803
804 /*
805 * We haven't seen this chunk before. Our caller is surely
806 * going to add it the hard way now. Remember the most likely
807 * start of the to-be-added chunk: the current end of the
808 * struct strbuf.
809 */
810 chunk->off = sb->len;
811 return 0;
812 }
813
814 static void parse_commit_header(struct format_commit_context *context)
815 {
816 const char *msg = context->message;
817 int i;
818
819 for (i = 0; msg[i]; i++) {
820 int eol;
821 for (eol = i; msg[eol] && msg[eol] != '\n'; eol++)
822 ; /* do nothing */
823
824 if (i == eol) {
825 break;
826 } else if (!prefixcmp(msg + i, "author ")) {
827 context->author.off = i + 7;
828 context->author.len = eol - i - 7;
829 } else if (!prefixcmp(msg + i, "committer ")) {
830 context->committer.off = i + 10;
831 context->committer.len = eol - i - 10;
832 }
833 i = eol;
834 }
835 context->message_off = i;
836 context->commit_header_parsed = 1;
837 }
838
839 static int istitlechar(char c)
840 {
841 return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') ||
842 (c >= '0' && c <= '9') || c == '.' || c == '_';
843 }
844
845 static void format_sanitized_subject(struct strbuf *sb, const char *msg)
846 {
847 size_t trimlen;
848 size_t start_len = sb->len;
849 int space = 2;
850
851 for (; *msg && *msg != '\n'; msg++) {
852 if (istitlechar(*msg)) {
853 if (space == 1)
854 strbuf_addch(sb, '-');
855 space = 0;
856 strbuf_addch(sb, *msg);
857 if (*msg == '.')
858 while (*(msg+1) == '.')
859 msg++;
860 } else
861 space |= 1;
862 }
863
864 /* trim any trailing '.' or '-' characters */
865 trimlen = 0;
866 while (sb->len - trimlen > start_len &&
867 (sb->buf[sb->len - 1 - trimlen] == '.'
868 || sb->buf[sb->len - 1 - trimlen] == '-'))
869 trimlen++;
870 strbuf_remove(sb, sb->len - trimlen, trimlen);
871 }
872
873 const char *format_subject(struct strbuf *sb, const char *msg,
874 const char *line_separator)
875 {
876 int first = 1;
877
878 for (;;) {
879 const char *line = msg;
880 int linelen = get_one_line(line);
881
882 msg += linelen;
883 if (!linelen || is_empty_line(line, &linelen))
884 break;
885
886 if (!sb)
887 continue;
888 strbuf_grow(sb, linelen + 2);
889 if (!first)
890 strbuf_addstr(sb, line_separator);
891 strbuf_add(sb, line, linelen);
892 first = 0;
893 }
894 return msg;
895 }
896
897 static void parse_commit_message(struct format_commit_context *c)
898 {
899 const char *msg = c->message + c->message_off;
900 const char *start = c->message;
901
902 msg = skip_empty_lines(msg);
903 c->subject_off = msg - start;
904
905 msg = format_subject(NULL, msg, NULL);
906 msg = skip_empty_lines(msg);
907 c->body_off = msg - start;
908
909 c->commit_message_parsed = 1;
910 }
911
912 static void strbuf_wrap(struct strbuf *sb, size_t pos,
913 size_t width, size_t indent1, size_t indent2)
914 {
915 struct strbuf tmp = STRBUF_INIT;
916
917 if (pos)
918 strbuf_add(&tmp, sb->buf, pos);
919 strbuf_add_wrapped_text(&tmp, sb->buf + pos,
920 (int) indent1, (int) indent2, (int) width);
921 strbuf_swap(&tmp, sb);
922 strbuf_release(&tmp);
923 }
924
925 static void rewrap_message_tail(struct strbuf *sb,
926 struct format_commit_context *c,
927 size_t new_width, size_t new_indent1,
928 size_t new_indent2)
929 {
930 if (c->width == new_width && c->indent1 == new_indent1 &&
931 c->indent2 == new_indent2)
932 return;
933 if (c->wrap_start < sb->len)
934 strbuf_wrap(sb, c->wrap_start, c->width, c->indent1, c->indent2);
935 c->wrap_start = sb->len;
936 c->width = new_width;
937 c->indent1 = new_indent1;
938 c->indent2 = new_indent2;
939 }
940
941 static int format_reflog_person(struct strbuf *sb,
942 char part,
943 struct reflog_walk_info *log,
944 enum date_mode dmode)
945 {
946 const char *ident;
947
948 if (!log)
949 return 2;
950
951 ident = get_reflog_ident(log);
952 if (!ident)
953 return 2;
954
955 return format_person_part(sb, part, ident, strlen(ident), dmode);
956 }
957
958 static size_t parse_color(struct strbuf *sb, /* in UTF-8 */
959 const char *placeholder,
960 struct format_commit_context *c)
961 {
962 if (placeholder[1] == '(') {
963 const char *begin = placeholder + 2;
964 const char *end = strchr(begin, ')');
965 char color[COLOR_MAXLEN];
966
967 if (!end)
968 return 0;
969 if (!prefixcmp(begin, "auto,")) {
970 if (!want_color(c->pretty_ctx->color))
971 return end - placeholder + 1;
972 begin += 5;
973 }
974 color_parse_mem(begin,
975 end - begin,
976 "--pretty format", color);
977 strbuf_addstr(sb, color);
978 return end - placeholder + 1;
979 }
980 if (!prefixcmp(placeholder + 1, "red")) {
981 strbuf_addstr(sb, GIT_COLOR_RED);
982 return 4;
983 } else if (!prefixcmp(placeholder + 1, "green")) {
984 strbuf_addstr(sb, GIT_COLOR_GREEN);
985 return 6;
986 } else if (!prefixcmp(placeholder + 1, "blue")) {
987 strbuf_addstr(sb, GIT_COLOR_BLUE);
988 return 5;
989 } else if (!prefixcmp(placeholder + 1, "reset")) {
990 strbuf_addstr(sb, GIT_COLOR_RESET);
991 return 6;
992 } else
993 return 0;
994 }
995
996 static size_t parse_padding_placeholder(struct strbuf *sb,
997 const char *placeholder,
998 struct format_commit_context *c)
999 {
1000 const char *ch = placeholder;
1001 enum flush_type flush_type;
1002 int to_column = 0;
1003
1004 switch (*ch++) {
1005 case '<':
1006 flush_type = flush_right;
1007 break;
1008 case '>':
1009 if (*ch == '<') {
1010 flush_type = flush_both;
1011 ch++;
1012 } else if (*ch == '>') {
1013 flush_type = flush_left_and_steal;
1014 ch++;
1015 } else
1016 flush_type = flush_left;
1017 break;
1018 default:
1019 return 0;
1020 }
1021
1022 /* the next value means "wide enough to that column" */
1023 if (*ch == '|') {
1024 to_column = 1;
1025 ch++;
1026 }
1027
1028 if (*ch == '(') {
1029 const char *start = ch + 1;
1030 const char *end = start + strcspn(start, ",)");
1031 char *next;
1032 int width;
1033 if (!end || end == start)
1034 return 0;
1035 width = strtoul(start, &next, 10);
1036 if (next == start || width == 0)
1037 return 0;
1038 c->padding = to_column ? -width : width;
1039 c->flush_type = flush_type;
1040
1041 if (*end == ',') {
1042 start = end + 1;
1043 end = strchr(start, ')');
1044 if (!end || end == start)
1045 return 0;
1046 if (!prefixcmp(start, "trunc)"))
1047 c->truncate = trunc_right;
1048 else if (!prefixcmp(start, "ltrunc)"))
1049 c->truncate = trunc_left;
1050 else if (!prefixcmp(start, "mtrunc)"))
1051 c->truncate = trunc_middle;
1052 else
1053 return 0;
1054 } else
1055 c->truncate = trunc_none;
1056
1057 return end - placeholder + 1;
1058 }
1059 return 0;
1060 }
1061
1062 static size_t format_commit_one(struct strbuf *sb, /* in UTF-8 */
1063 const char *placeholder,
1064 void *context)
1065 {
1066 struct format_commit_context *c = context;
1067 const struct commit *commit = c->commit;
1068 const char *msg = c->message;
1069 struct commit_list *p;
1070 int h1, h2;
1071
1072 /* these are independent of the commit */
1073 switch (placeholder[0]) {
1074 case 'C':
1075 if (!prefixcmp(placeholder + 1, "(auto)")) {
1076 c->auto_color = 1;
1077 return 7; /* consumed 7 bytes, "C(auto)" */
1078 } else {
1079 int ret = parse_color(sb, placeholder, c);
1080 if (ret)
1081 c->auto_color = 0;
1082 /*
1083 * Otherwise, we decided to treat %C<unknown>
1084 * as a literal string, and the previous
1085 * %C(auto) is still valid.
1086 */
1087 return ret;
1088 }
1089 case 'n': /* newline */
1090 strbuf_addch(sb, '\n');
1091 return 1;
1092 case 'x':
1093 /* %x00 == NUL, %x0a == LF, etc. */
1094 if (0 <= (h1 = hexval_table[0xff & placeholder[1]]) &&
1095 h1 <= 16 &&
1096 0 <= (h2 = hexval_table[0xff & placeholder[2]]) &&
1097 h2 <= 16) {
1098 strbuf_addch(sb, (h1<<4)|h2);
1099 return 3;
1100 } else
1101 return 0;
1102 case 'w':
1103 if (placeholder[1] == '(') {
1104 unsigned long width = 0, indent1 = 0, indent2 = 0;
1105 char *next;
1106 const char *start = placeholder + 2;
1107 const char *end = strchr(start, ')');
1108 if (!end)
1109 return 0;
1110 if (end > start) {
1111 width = strtoul(start, &next, 10);
1112 if (*next == ',') {
1113 indent1 = strtoul(next + 1, &next, 10);
1114 if (*next == ',') {
1115 indent2 = strtoul(next + 1,
1116 &next, 10);
1117 }
1118 }
1119 if (*next != ')')
1120 return 0;
1121 }
1122 rewrap_message_tail(sb, c, width, indent1, indent2);
1123 return end - placeholder + 1;
1124 } else
1125 return 0;
1126
1127 case '<':
1128 case '>':
1129 return parse_padding_placeholder(sb, placeholder, c);
1130 }
1131
1132 /* these depend on the commit */
1133 if (!commit->object.parsed)
1134 parse_object(commit->object.sha1);
1135
1136 switch (placeholder[0]) {
1137 case 'H': /* commit hash */
1138 strbuf_addstr(sb, diff_get_color(c->auto_color, DIFF_COMMIT));
1139 strbuf_addstr(sb, sha1_to_hex(commit->object.sha1));
1140 strbuf_addstr(sb, diff_get_color(c->auto_color, DIFF_RESET));
1141 return 1;
1142 case 'h': /* abbreviated commit hash */
1143 strbuf_addstr(sb, diff_get_color(c->auto_color, DIFF_COMMIT));
1144 if (add_again(sb, &c->abbrev_commit_hash)) {
1145 strbuf_addstr(sb, diff_get_color(c->auto_color, DIFF_RESET));
1146 return 1;
1147 }
1148 strbuf_addstr(sb, find_unique_abbrev(commit->object.sha1,
1149 c->pretty_ctx->abbrev));
1150 strbuf_addstr(sb, diff_get_color(c->auto_color, DIFF_RESET));
1151 c->abbrev_commit_hash.len = sb->len - c->abbrev_commit_hash.off;
1152 return 1;
1153 case 'T': /* tree hash */
1154 strbuf_addstr(sb, sha1_to_hex(commit->tree->object.sha1));
1155 return 1;
1156 case 't': /* abbreviated tree hash */
1157 if (add_again(sb, &c->abbrev_tree_hash))
1158 return 1;
1159 strbuf_addstr(sb, find_unique_abbrev(commit->tree->object.sha1,
1160 c->pretty_ctx->abbrev));
1161 c->abbrev_tree_hash.len = sb->len - c->abbrev_tree_hash.off;
1162 return 1;
1163 case 'P': /* parent hashes */
1164 for (p = commit->parents; p; p = p->next) {
1165 if (p != commit->parents)
1166 strbuf_addch(sb, ' ');
1167 strbuf_addstr(sb, sha1_to_hex(p->item->object.sha1));
1168 }
1169 return 1;
1170 case 'p': /* abbreviated parent hashes */
1171 if (add_again(sb, &c->abbrev_parent_hashes))
1172 return 1;
1173 for (p = commit->parents; p; p = p->next) {
1174 if (p != commit->parents)
1175 strbuf_addch(sb, ' ');
1176 strbuf_addstr(sb, find_unique_abbrev(
1177 p->item->object.sha1,
1178 c->pretty_ctx->abbrev));
1179 }
1180 c->abbrev_parent_hashes.len = sb->len -
1181 c->abbrev_parent_hashes.off;
1182 return 1;
1183 case 'm': /* left/right/bottom */
1184 strbuf_addstr(sb, get_revision_mark(NULL, commit));
1185 return 1;
1186 case 'd':
1187 load_ref_decorations(DECORATE_SHORT_REFS);
1188 format_decorations(sb, commit, c->auto_color);
1189 return 1;
1190 case 'g': /* reflog info */
1191 switch(placeholder[1]) {
1192 case 'd': /* reflog selector */
1193 case 'D':
1194 if (c->pretty_ctx->reflog_info)
1195 get_reflog_selector(sb,
1196 c->pretty_ctx->reflog_info,
1197 c->pretty_ctx->date_mode,
1198 c->pretty_ctx->date_mode_explicit,
1199 (placeholder[1] == 'd'));
1200 return 2;
1201 case 's': /* reflog message */
1202 if (c->pretty_ctx->reflog_info)
1203 get_reflog_message(sb, c->pretty_ctx->reflog_info);
1204 return 2;
1205 case 'n':
1206 case 'N':
1207 case 'e':
1208 case 'E':
1209 return format_reflog_person(sb,
1210 placeholder[1],
1211 c->pretty_ctx->reflog_info,
1212 c->pretty_ctx->date_mode);
1213 }
1214 return 0; /* unknown %g placeholder */
1215 case 'N':
1216 if (c->pretty_ctx->notes_message) {
1217 strbuf_addstr(sb, c->pretty_ctx->notes_message);
1218 return 1;
1219 }
1220 return 0;
1221 }
1222
1223 if (placeholder[0] == 'G') {
1224 if (!c->signature_check.result)
1225 check_commit_signature(c->commit, &(c->signature_check));
1226 switch (placeholder[1]) {
1227 case 'G':
1228 if (c->signature_check.gpg_output)
1229 strbuf_addstr(sb, c->signature_check.gpg_output);
1230 break;
1231 case '?':
1232 switch (c->signature_check.result) {
1233 case 'G':
1234 case 'B':
1235 case 'U':
1236 case 'N':
1237 strbuf_addch(sb, c->signature_check.result);
1238 }
1239 break;
1240 case 'S':
1241 if (c->signature_check.signer)
1242 strbuf_addstr(sb, c->signature_check.signer);
1243 break;
1244 case 'K':
1245 if (c->signature_check.key)
1246 strbuf_addstr(sb, c->signature_check.key);
1247 break;
1248 }
1249 return 2;
1250 }
1251
1252
1253 /* For the rest we have to parse the commit header. */
1254 if (!c->commit_header_parsed)
1255 parse_commit_header(c);
1256
1257 switch (placeholder[0]) {
1258 case 'a': /* author ... */
1259 return format_person_part(sb, placeholder[1],
1260 msg + c->author.off, c->author.len,
1261 c->pretty_ctx->date_mode);
1262 case 'c': /* committer ... */
1263 return format_person_part(sb, placeholder[1],
1264 msg + c->committer.off, c->committer.len,
1265 c->pretty_ctx->date_mode);
1266 case 'e': /* encoding */
1267 if (c->commit_encoding)
1268 strbuf_addstr(sb, c->commit_encoding);
1269 return 1;
1270 case 'B': /* raw body */
1271 /* message_off is always left at the initial newline */
1272 strbuf_addstr(sb, msg + c->message_off + 1);
1273 return 1;
1274 }
1275
1276 /* Now we need to parse the commit message. */
1277 if (!c->commit_message_parsed)
1278 parse_commit_message(c);
1279
1280 switch (placeholder[0]) {
1281 case 's': /* subject */
1282 format_subject(sb, msg + c->subject_off, " ");
1283 return 1;
1284 case 'f': /* sanitized subject */
1285 format_sanitized_subject(sb, msg + c->subject_off);
1286 return 1;
1287 case 'b': /* body */
1288 strbuf_addstr(sb, msg + c->body_off);
1289 return 1;
1290 }
1291 return 0; /* unknown placeholder */
1292 }
1293
1294 static size_t format_and_pad_commit(struct strbuf *sb, /* in UTF-8 */
1295 const char *placeholder,
1296 struct format_commit_context *c)
1297 {
1298 struct strbuf local_sb = STRBUF_INIT;
1299 int total_consumed = 0, len, padding = c->padding;
1300 if (padding < 0) {
1301 const char *start = strrchr(sb->buf, '\n');
1302 int occupied;
1303 if (!start)
1304 start = sb->buf;
1305 occupied = utf8_strnwidth(start, -1, 1);
1306 padding = (-padding) - occupied;
1307 }
1308 while (1) {
1309 int modifier = *placeholder == 'C';
1310 int consumed = format_commit_one(&local_sb, placeholder, c);
1311 total_consumed += consumed;
1312
1313 if (!modifier)
1314 break;
1315
1316 placeholder += consumed;
1317 if (*placeholder != '%')
1318 break;
1319 placeholder++;
1320 total_consumed++;
1321 }
1322 len = utf8_strnwidth(local_sb.buf, -1, 1);
1323
1324 if (c->flush_type == flush_left_and_steal) {
1325 const char *ch = sb->buf + sb->len - 1;
1326 while (len > padding && ch > sb->buf) {
1327 const char *p;
1328 if (*ch == ' ') {
1329 ch--;
1330 padding++;
1331 continue;
1332 }
1333 /* check for trailing ansi sequences */
1334 if (*ch != 'm')
1335 break;
1336 p = ch - 1;
1337 while (ch - p < 10 && *p != '\033')
1338 p--;
1339 if (*p != '\033' ||
1340 ch + 1 - p != display_mode_esc_sequence_len(p))
1341 break;
1342 /*
1343 * got a good ansi sequence, put it back to
1344 * local_sb as we're cutting sb
1345 */
1346 strbuf_insert(&local_sb, 0, p, ch + 1 - p);
1347 ch = p - 1;
1348 }
1349 strbuf_setlen(sb, ch + 1 - sb->buf);
1350 c->flush_type = flush_left;
1351 }
1352
1353 if (len > padding) {
1354 switch (c->truncate) {
1355 case trunc_left:
1356 strbuf_utf8_replace(&local_sb,
1357 0, len - (padding - 2),
1358 "..");
1359 break;
1360 case trunc_middle:
1361 strbuf_utf8_replace(&local_sb,
1362 padding / 2 - 1,
1363 len - (padding - 2),
1364 "..");
1365 break;
1366 case trunc_right:
1367 strbuf_utf8_replace(&local_sb,
1368 padding - 2, len - (padding - 2),
1369 "..");
1370 break;
1371 case trunc_none:
1372 break;
1373 }
1374 strbuf_addstr(sb, local_sb.buf);
1375 } else {
1376 int sb_len = sb->len, offset = 0;
1377 if (c->flush_type == flush_left)
1378 offset = padding - len;
1379 else if (c->flush_type == flush_both)
1380 offset = (padding - len) / 2;
1381 /*
1382 * we calculate padding in columns, now
1383 * convert it back to chars
1384 */
1385 padding = padding - len + local_sb.len;
1386 strbuf_grow(sb, padding);
1387 strbuf_setlen(sb, sb_len + padding);
1388 memset(sb->buf + sb_len, ' ', sb->len - sb_len);
1389 memcpy(sb->buf + sb_len + offset, local_sb.buf,
1390 local_sb.len);
1391 }
1392 strbuf_release(&local_sb);
1393 c->flush_type = no_flush;
1394 return total_consumed;
1395 }
1396
1397 static size_t format_commit_item(struct strbuf *sb, /* in UTF-8 */
1398 const char *placeholder,
1399 void *context)
1400 {
1401 int consumed;
1402 size_t orig_len;
1403 enum {
1404 NO_MAGIC,
1405 ADD_LF_BEFORE_NON_EMPTY,
1406 DEL_LF_BEFORE_EMPTY,
1407 ADD_SP_BEFORE_NON_EMPTY
1408 } magic = NO_MAGIC;
1409
1410 switch (placeholder[0]) {
1411 case '-':
1412 magic = DEL_LF_BEFORE_EMPTY;
1413 break;
1414 case '+':
1415 magic = ADD_LF_BEFORE_NON_EMPTY;
1416 break;
1417 case ' ':
1418 magic = ADD_SP_BEFORE_NON_EMPTY;
1419 break;
1420 default:
1421 break;
1422 }
1423 if (magic != NO_MAGIC)
1424 placeholder++;
1425
1426 orig_len = sb->len;
1427 if (((struct format_commit_context *)context)->flush_type != no_flush)
1428 consumed = format_and_pad_commit(sb, placeholder, context);
1429 else
1430 consumed = format_commit_one(sb, placeholder, context);
1431 if (magic == NO_MAGIC)
1432 return consumed;
1433
1434 if ((orig_len == sb->len) && magic == DEL_LF_BEFORE_EMPTY) {
1435 while (sb->len && sb->buf[sb->len - 1] == '\n')
1436 strbuf_setlen(sb, sb->len - 1);
1437 } else if (orig_len != sb->len) {
1438 if (magic == ADD_LF_BEFORE_NON_EMPTY)
1439 strbuf_insert(sb, orig_len, "\n", 1);
1440 else if (magic == ADD_SP_BEFORE_NON_EMPTY)
1441 strbuf_insert(sb, orig_len, " ", 1);
1442 }
1443 return consumed + 1;
1444 }
1445
1446 static size_t userformat_want_item(struct strbuf *sb, const char *placeholder,
1447 void *context)
1448 {
1449 struct userformat_want *w = context;
1450
1451 if (*placeholder == '+' || *placeholder == '-' || *placeholder == ' ')
1452 placeholder++;
1453
1454 switch (*placeholder) {
1455 case 'N':
1456 w->notes = 1;
1457 break;
1458 }
1459 return 0;
1460 }
1461
1462 void userformat_find_requirements(const char *fmt, struct userformat_want *w)
1463 {
1464 struct strbuf dummy = STRBUF_INIT;
1465
1466 if (!fmt) {
1467 if (!user_format)
1468 return;
1469 fmt = user_format;
1470 }
1471 strbuf_expand(&dummy, fmt, userformat_want_item, w);
1472 strbuf_release(&dummy);
1473 }
1474
1475 void format_commit_message(const struct commit *commit,
1476 const char *format, struct strbuf *sb,
1477 const struct pretty_print_context *pretty_ctx)
1478 {
1479 struct format_commit_context context;
1480 const char *output_enc = pretty_ctx->output_encoding;
1481 const char *utf8 = "UTF-8";
1482
1483 memset(&context, 0, sizeof(context));
1484 context.commit = commit;
1485 context.pretty_ctx = pretty_ctx;
1486 context.wrap_start = sb->len;
1487 context.message = logmsg_reencode(commit,
1488 &context.commit_encoding,
1489 output_enc);
1490
1491 strbuf_expand(sb, format, format_commit_item, &context);
1492 rewrap_message_tail(sb, &context, 0, 0, 0);
1493
1494 if (output_enc) {
1495 if (same_encoding(utf8, output_enc))
1496 output_enc = NULL;
1497 } else {
1498 if (context.commit_encoding &&
1499 !same_encoding(context.commit_encoding, utf8))
1500 output_enc = context.commit_encoding;
1501 }
1502
1503 if (output_enc) {
1504 int outsz;
1505 char *out = reencode_string_len(sb->buf, sb->len,
1506 output_enc, utf8, &outsz);
1507 if (out)
1508 strbuf_attach(sb, out, outsz, outsz + 1);
1509 }
1510
1511 free(context.commit_encoding);
1512 logmsg_free(context.message, commit);
1513 free(context.signature_check.gpg_output);
1514 free(context.signature_check.signer);
1515 }
1516
1517 static void pp_header(const struct pretty_print_context *pp,
1518 const char *encoding,
1519 const struct commit *commit,
1520 const char **msg_p,
1521 struct strbuf *sb)
1522 {
1523 int parents_shown = 0;
1524
1525 for (;;) {
1526 const char *line = *msg_p;
1527 int linelen = get_one_line(*msg_p);
1528
1529 if (!linelen)
1530 return;
1531 *msg_p += linelen;
1532
1533 if (linelen == 1)
1534 /* End of header */
1535 return;
1536
1537 if (pp->fmt == CMIT_FMT_RAW) {
1538 strbuf_add(sb, line, linelen);
1539 continue;
1540 }
1541
1542 if (!prefixcmp(line, "parent ")) {
1543 if (linelen != 48)
1544 die("bad parent line in commit");
1545 continue;
1546 }
1547
1548 if (!parents_shown) {
1549 struct commit_list *parent;
1550 int num;
1551 for (parent = commit->parents, num = 0;
1552 parent;
1553 parent = parent->next, num++)
1554 ;
1555 /* with enough slop */
1556 strbuf_grow(sb, num * 50 + 20);
1557 add_merge_info(pp, sb, commit);
1558 parents_shown = 1;
1559 }
1560
1561 /*
1562 * MEDIUM == DEFAULT shows only author with dates.
1563 * FULL shows both authors but not dates.
1564 * FULLER shows both authors and dates.
1565 */
1566 if (!prefixcmp(line, "author ")) {
1567 strbuf_grow(sb, linelen + 80);
1568 pp_user_info(pp, "Author", sb, line + 7, encoding);
1569 }
1570 if (!prefixcmp(line, "committer ") &&
1571 (pp->fmt == CMIT_FMT_FULL || pp->fmt == CMIT_FMT_FULLER)) {
1572 strbuf_grow(sb, linelen + 80);
1573 pp_user_info(pp, "Commit", sb, line + 10, encoding);
1574 }
1575 }
1576 }
1577
1578 void pp_title_line(const struct pretty_print_context *pp,
1579 const char **msg_p,
1580 struct strbuf *sb,
1581 const char *encoding,
1582 int need_8bit_cte)
1583 {
1584 static const int max_length = 78; /* per rfc2047 */
1585 struct strbuf title;
1586
1587 strbuf_init(&title, 80);
1588 *msg_p = format_subject(&title, *msg_p,
1589 pp->preserve_subject ? "\n" : " ");
1590
1591 strbuf_grow(sb, title.len + 1024);
1592 if (pp->subject) {
1593 strbuf_addstr(sb, pp->subject);
1594 if (needs_rfc2047_encoding(title.buf, title.len, RFC2047_SUBJECT))
1595 add_rfc2047(sb, title.buf, title.len,
1596 encoding, RFC2047_SUBJECT);
1597 else
1598 strbuf_add_wrapped_bytes(sb, title.buf, title.len,
1599 -last_line_length(sb), 1, max_length);
1600 } else {
1601 strbuf_addbuf(sb, &title);
1602 }
1603 strbuf_addch(sb, '\n');
1604
1605 if (need_8bit_cte > 0) {
1606 const char *header_fmt =
1607 "MIME-Version: 1.0\n"
1608 "Content-Type: text/plain; charset=%s\n"
1609 "Content-Transfer-Encoding: 8bit\n";
1610 strbuf_addf(sb, header_fmt, encoding);
1611 }
1612 if (pp->after_subject) {
1613 strbuf_addstr(sb, pp->after_subject);
1614 }
1615 if (pp->fmt == CMIT_FMT_EMAIL) {
1616 strbuf_addch(sb, '\n');
1617 }
1618 strbuf_release(&title);
1619 }
1620
1621 void pp_remainder(const struct pretty_print_context *pp,
1622 const char **msg_p,
1623 struct strbuf *sb,
1624 int indent)
1625 {
1626 int first = 1;
1627 for (;;) {
1628 const char *line = *msg_p;
1629 int linelen = get_one_line(line);
1630 *msg_p += linelen;
1631
1632 if (!linelen)
1633 break;
1634
1635 if (is_empty_line(line, &linelen)) {
1636 if (first)
1637 continue;
1638 if (pp->fmt == CMIT_FMT_SHORT)
1639 break;
1640 }
1641 first = 0;
1642
1643 strbuf_grow(sb, linelen + indent + 20);
1644 if (indent) {
1645 memset(sb->buf + sb->len, ' ', indent);
1646 strbuf_setlen(sb, sb->len + indent);
1647 }
1648 strbuf_add(sb, line, linelen);
1649 strbuf_addch(sb, '\n');
1650 }
1651 }
1652
1653 void pretty_print_commit(const struct pretty_print_context *pp,
1654 const struct commit *commit,
1655 struct strbuf *sb)
1656 {
1657 unsigned long beginning_of_body;
1658 int indent = 4;
1659 const char *msg;
1660 char *reencoded;
1661 const char *encoding;
1662 int need_8bit_cte = pp->need_8bit_cte;
1663
1664 if (pp->fmt == CMIT_FMT_USERFORMAT) {
1665 format_commit_message(commit, user_format, sb, pp);
1666 return;
1667 }
1668
1669 encoding = get_log_output_encoding();
1670 msg = reencoded = logmsg_reencode(commit, NULL, encoding);
1671
1672 if (pp->fmt == CMIT_FMT_ONELINE || pp->fmt == CMIT_FMT_EMAIL)
1673 indent = 0;
1674
1675 /*
1676 * We need to check and emit Content-type: to mark it
1677 * as 8-bit if we haven't done so.
1678 */
1679 if (pp->fmt == CMIT_FMT_EMAIL && need_8bit_cte == 0) {
1680 int i, ch, in_body;
1681
1682 for (in_body = i = 0; (ch = msg[i]); i++) {
1683 if (!in_body) {
1684 /* author could be non 7-bit ASCII but
1685 * the log may be so; skip over the
1686 * header part first.
1687 */
1688 if (ch == '\n' && msg[i+1] == '\n')
1689 in_body = 1;
1690 }
1691 else if (non_ascii(ch)) {
1692 need_8bit_cte = 1;
1693 break;
1694 }
1695 }
1696 }
1697
1698 pp_header(pp, encoding, commit, &msg, sb);
1699 if (pp->fmt != CMIT_FMT_ONELINE && !pp->subject) {
1700 strbuf_addch(sb, '\n');
1701 }
1702
1703 /* Skip excess blank lines at the beginning of body, if any... */
1704 msg = skip_empty_lines(msg);
1705
1706 /* These formats treat the title line specially. */
1707 if (pp->fmt == CMIT_FMT_ONELINE || pp->fmt == CMIT_FMT_EMAIL)
1708 pp_title_line(pp, &msg, sb, encoding, need_8bit_cte);
1709
1710 beginning_of_body = sb->len;
1711 if (pp->fmt != CMIT_FMT_ONELINE)
1712 pp_remainder(pp, &msg, sb, indent);
1713 strbuf_rtrim(sb);
1714
1715 /* Make sure there is an EOLN for the non-oneline case */
1716 if (pp->fmt != CMIT_FMT_ONELINE)
1717 strbuf_addch(sb, '\n');
1718
1719 /*
1720 * The caller may append additional body text in e-mail
1721 * format. Make sure we did not strip the blank line
1722 * between the header and the body.
1723 */
1724 if (pp->fmt == CMIT_FMT_EMAIL && sb->len <= beginning_of_body)
1725 strbuf_addch(sb, '\n');
1726
1727 logmsg_free(reencoded, commit);
1728 }
1729
1730 void pp_commit_easy(enum cmit_fmt fmt, const struct commit *commit,
1731 struct strbuf *sb)
1732 {
1733 struct pretty_print_context pp = {0};
1734 pp.fmt = fmt;
1735 pretty_print_commit(&pp, commit, sb);
1736 }
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