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remote-bzr: use branch variable when appropriate
[git/debian.git] / pretty.c
blobba3148181eff960ff6de68cafffe77e37719fd1d
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 strbuf name;
414 struct strbuf mail;
415 struct ident_split ident;
416 int linelen;
417 char *line_end;
418 const char *mailbuf, *namebuf;
419 size_t namelen, maillen;
420 int max_length = 78; /* per rfc2822 */
421
422 if (pp->fmt == CMIT_FMT_ONELINE)
423 return;
424
425 line_end = strchr(line, '\n');
426 if (!line_end) {
427 line_end = strchr(line, '\0');
428 if (!line_end)
429 return;
430 }
431
432 linelen = ++line_end - line;
433 if (split_ident_line(&ident, line, linelen))
434 return;
435
436
437 mailbuf = ident.mail_begin;
438 maillen = ident.mail_end - ident.mail_begin;
439 namebuf = ident.name_begin;
440 namelen = ident.name_end - ident.name_begin;
441
442 if (pp->mailmap)
443 map_user(pp->mailmap, &mailbuf, &maillen, &namebuf, &namelen);
444
445 strbuf_init(&mail, 0);
446 strbuf_init(&name, 0);
447
448 strbuf_add(&mail, mailbuf, maillen);
449 strbuf_add(&name, namebuf, namelen);
450
451 namelen = name.len + mail.len + 3; /* ' ' + '<' + '>' */
452
453 if (pp->fmt == CMIT_FMT_EMAIL) {
454 strbuf_addstr(sb, "From: ");
455 if (needs_rfc2047_encoding(name.buf, name.len, RFC2047_ADDRESS)) {
456 add_rfc2047(sb, name.buf, name.len,
457 encoding, RFC2047_ADDRESS);
458 max_length = 76; /* per rfc2047 */
459 } else if (needs_rfc822_quoting(name.buf, name.len)) {
460 struct strbuf quoted = STRBUF_INIT;
461 add_rfc822_quoted(&quoted, name.buf, name.len);
462 strbuf_add_wrapped_bytes(sb, quoted.buf, quoted.len,
463 -6, 1, max_length);
464 strbuf_release(&quoted);
465 } else {
466 strbuf_add_wrapped_bytes(sb, name.buf, name.len,
467 -6, 1, max_length);
468 }
469 if (namelen - name.len + last_line_length(sb) > max_length)
470 strbuf_addch(sb, '\n');
471
472 strbuf_addf(sb, " <%s>\n", mail.buf);
473 } else {
474 strbuf_addf(sb, "%s: %.*s%s <%s>\n", what,
475 (pp->fmt == CMIT_FMT_FULLER) ? 4 : 0,
476 " ", name.buf, mail.buf);
477 }
478
479 strbuf_release(&mail);
480 strbuf_release(&name);
481
482 switch (pp->fmt) {
483 case CMIT_FMT_MEDIUM:
484 strbuf_addf(sb, "Date: %s\n",
485 show_ident_date(&ident, pp->date_mode));
486 break;
487 case CMIT_FMT_EMAIL:
488 strbuf_addf(sb, "Date: %s\n",
489 show_ident_date(&ident, DATE_RFC2822));
490 break;
491 case CMIT_FMT_FULLER:
492 strbuf_addf(sb, "%sDate: %s\n", what,
493 show_ident_date(&ident, pp->date_mode));
494 break;
495 default:
496 /* notin' */
497 break;
498 }
499 }
500
501 static int is_empty_line(const char *line, int *len_p)
502 {
503 int len = *len_p;
504 while (len && isspace(line[len-1]))
505 len--;
506 *len_p = len;
507 return !len;
508 }
509
510 static const char *skip_empty_lines(const char *msg)
511 {
512 for (;;) {
513 int linelen = get_one_line(msg);
514 int ll = linelen;
515 if (!linelen)
516 break;
517 if (!is_empty_line(msg, &ll))
518 break;
519 msg += linelen;
520 }
521 return msg;
522 }
523
524 static void add_merge_info(const struct pretty_print_context *pp,
525 struct strbuf *sb, const struct commit *commit)
526 {
527 struct commit_list *parent = commit->parents;
528
529 if ((pp->fmt == CMIT_FMT_ONELINE) || (pp->fmt == CMIT_FMT_EMAIL) ||
530 !parent || !parent->next)
531 return;
532
533 strbuf_addstr(sb, "Merge:");
534
535 while (parent) {
536 struct commit *p = parent->item;
537 const char *hex = NULL;
538 if (pp->abbrev)
539 hex = find_unique_abbrev(p->object.sha1, pp->abbrev);
540 if (!hex)
541 hex = sha1_to_hex(p->object.sha1);
542 parent = parent->next;
543
544 strbuf_addf(sb, " %s", hex);
545 }
546 strbuf_addch(sb, '\n');
547 }
548
549 static char *get_header(const struct commit *commit, const char *msg,
550 const char *key)
551 {
552 int key_len = strlen(key);
553 const char *line = msg;
554
555 while (line) {
556 const char *eol = strchr(line, '\n'), *next;
557
558 if (line == eol)
559 return NULL;
560 if (!eol) {
561 warning("malformed commit (header is missing newline): %s",
562 sha1_to_hex(commit->object.sha1));
563 eol = line + strlen(line);
564 next = NULL;
565 } else
566 next = eol + 1;
567 if (eol - line > key_len &&
568 !strncmp(line, key, key_len) &&
569 line[key_len] == ' ') {
570 return xmemdupz(line + key_len + 1, eol - line - key_len - 1);
571 }
572 line = next;
573 }
574 return NULL;
575 }
576
577 static char *replace_encoding_header(char *buf, const char *encoding)
578 {
579 struct strbuf tmp = STRBUF_INIT;
580 size_t start, len;
581 char *cp = buf;
582
583 /* guess if there is an encoding header before a \n\n */
584 while (strncmp(cp, "encoding ", strlen("encoding "))) {
585 cp = strchr(cp, '\n');
586 if (!cp || *++cp == '\n')
587 return buf;
588 }
589 start = cp - buf;
590 cp = strchr(cp, '\n');
591 if (!cp)
592 return buf; /* should not happen but be defensive */
593 len = cp + 1 - (buf + start);
594
595 strbuf_attach(&tmp, buf, strlen(buf), strlen(buf) + 1);
596 if (is_encoding_utf8(encoding)) {
597 /* we have re-coded to UTF-8; drop the header */
598 strbuf_remove(&tmp, start, len);
599 } else {
600 /* just replaces XXXX in 'encoding XXXX\n' */
601 strbuf_splice(&tmp, start + strlen("encoding "),
602 len - strlen("encoding \n"),
603 encoding, strlen(encoding));
604 }
605 return strbuf_detach(&tmp, NULL);
606 }
607
608 char *logmsg_reencode(const struct commit *commit,
609 char **commit_encoding,
610 const char *output_encoding)
611 {
612 static const char *utf8 = "UTF-8";
613 const char *use_encoding;
614 char *encoding;
615 char *msg = commit->buffer;
616 char *out;
617
618 if (!msg) {
619 enum object_type type;
620 unsigned long size;
621
622 msg = read_sha1_file(commit->object.sha1, &type, &size);
623 if (!msg)
624 die("Cannot read commit object %s",
625 sha1_to_hex(commit->object.sha1));
626 if (type != OBJ_COMMIT)
627 die("Expected commit for '%s', got %s",
628 sha1_to_hex(commit->object.sha1), typename(type));
629 }
630
631 if (!output_encoding || !*output_encoding) {
632 if (commit_encoding)
633 *commit_encoding =
634 get_header(commit, msg, "encoding");
635 return msg;
636 }
637 encoding = get_header(commit, msg, "encoding");
638 if (commit_encoding)
639 *commit_encoding = encoding;
640 use_encoding = encoding ? encoding : utf8;
641 if (same_encoding(use_encoding, output_encoding)) {
642 /*
643 * No encoding work to be done. If we have no encoding header
644 * at all, then there's nothing to do, and we can return the
645 * message verbatim (whether newly allocated or not).
646 */
647 if (!encoding)
648 return msg;
649
650 /*
651 * Otherwise, we still want to munge the encoding header in the
652 * result, which will be done by modifying the buffer. If we
653 * are using a fresh copy, we can reuse it. But if we are using
654 * the cached copy from commit->buffer, we need to duplicate it
655 * to avoid munging commit->buffer.
656 */
657 out = msg;
658 if (out == commit->buffer)
659 out = xstrdup(out);
660 }
661 else {
662 /*
663 * There's actual encoding work to do. Do the reencoding, which
664 * still leaves the header to be replaced in the next step. At
665 * this point, we are done with msg. If we allocated a fresh
666 * copy, we can free it.
667 */
668 out = reencode_string(msg, output_encoding, use_encoding);
669 if (out && msg != commit->buffer)
670 free(msg);
671 }
672
673 /*
674 * This replacement actually consumes the buffer we hand it, so we do
675 * not have to worry about freeing the old "out" here.
676 */
677 if (out)
678 out = replace_encoding_header(out, output_encoding);
679
680 if (!commit_encoding)
681 free(encoding);
682 /*
683 * If the re-encoding failed, out might be NULL here; in that
684 * case we just return the commit message verbatim.
685 */
686 return out ? out : msg;
687 }
688
689 void logmsg_free(char *msg, const struct commit *commit)
690 {
691 if (msg != commit->buffer)
692 free(msg);
693 }
694
695 static int mailmap_name(const char **email, size_t *email_len,
696 const char **name, size_t *name_len)
697 {
698 static struct string_list *mail_map;
699 if (!mail_map) {
700 mail_map = xcalloc(1, sizeof(*mail_map));
701 read_mailmap(mail_map, NULL);
702 }
703 return mail_map->nr && map_user(mail_map, email, email_len, name, name_len);
704 }
705
706 static size_t format_person_part(struct strbuf *sb, char part,
707 const char *msg, int len, enum date_mode dmode)
708 {
709 /* currently all placeholders have same length */
710 const int placeholder_len = 2;
711 struct ident_split s;
712 const char *name, *mail;
713 size_t maillen, namelen;
714
715 if (split_ident_line(&s, msg, len) < 0)
716 goto skip;
717
718 name = s.name_begin;
719 namelen = s.name_end - s.name_begin;
720 mail = s.mail_begin;
721 maillen = s.mail_end - s.mail_begin;
722
723 if (part == 'N' || part == 'E') /* mailmap lookup */
724 mailmap_name(&mail, &maillen, &name, &namelen);
725 if (part == 'n' || part == 'N') { /* name */
726 strbuf_add(sb, name, namelen);
727 return placeholder_len;
728 }
729 if (part == 'e' || part == 'E') { /* email */
730 strbuf_add(sb, mail, maillen);
731 return placeholder_len;
732 }
733
734 if (!s.date_begin)
735 goto skip;
736
737 if (part == 't') { /* date, UNIX timestamp */
738 strbuf_add(sb, s.date_begin, s.date_end - s.date_begin);
739 return placeholder_len;
740 }
741
742 switch (part) {
743 case 'd': /* date */
744 strbuf_addstr(sb, show_ident_date(&s, dmode));
745 return placeholder_len;
746 case 'D': /* date, RFC2822 style */
747 strbuf_addstr(sb, show_ident_date(&s, DATE_RFC2822));
748 return placeholder_len;
749 case 'r': /* date, relative */
750 strbuf_addstr(sb, show_ident_date(&s, DATE_RELATIVE));
751 return placeholder_len;
752 case 'i': /* date, ISO 8601 */
753 strbuf_addstr(sb, show_ident_date(&s, DATE_ISO8601));
754 return placeholder_len;
755 }
756
757 skip:
758 /*
759 * reading from either a bogus commit, or a reflog entry with
760 * %gn, %ge, etc.; 'sb' cannot be updated, but we still need
761 * to compute a valid return value.
762 */
763 if (part == 'n' || part == 'e' || part == 't' || part == 'd'
764 || part == 'D' || part == 'r' || part == 'i')
765 return placeholder_len;
766
767 return 0; /* unknown placeholder */
768 }
769
770 struct chunk {
771 size_t off;
772 size_t len;
773 };
774
775 enum flush_type {
776 no_flush,
777 flush_right,
778 flush_left,
779 flush_left_and_steal,
780 flush_both
781 };
782
783 enum trunc_type {
784 trunc_none,
785 trunc_left,
786 trunc_middle,
787 trunc_right
788 };
789
790 struct format_commit_context {
791 const struct commit *commit;
792 const struct pretty_print_context *pretty_ctx;
793 unsigned commit_header_parsed:1;
794 unsigned commit_message_parsed:1;
795 struct signature_check signature_check;
796 enum flush_type flush_type;
797 enum trunc_type truncate;
798 char *message;
799 char *commit_encoding;
800 size_t width, indent1, indent2;
801 int auto_color;
802 int padding;
803
804 /* These offsets are relative to the start of the commit message. */
805 struct chunk author;
806 struct chunk committer;
807 size_t message_off;
808 size_t subject_off;
809 size_t body_off;
810
811 /* The following ones are relative to the result struct strbuf. */
812 struct chunk abbrev_commit_hash;
813 struct chunk abbrev_tree_hash;
814 struct chunk abbrev_parent_hashes;
815 size_t wrap_start;
816 };
817
818 static int add_again(struct strbuf *sb, struct chunk *chunk)
819 {
820 if (chunk->len) {
821 strbuf_adddup(sb, chunk->off, chunk->len);
822 return 1;
823 }
824
825 /*
826 * We haven't seen this chunk before. Our caller is surely
827 * going to add it the hard way now. Remember the most likely
828 * start of the to-be-added chunk: the current end of the
829 * struct strbuf.
830 */
831 chunk->off = sb->len;
832 return 0;
833 }
834
835 static void parse_commit_header(struct format_commit_context *context)
836 {
837 const char *msg = context->message;
838 int i;
839
840 for (i = 0; msg[i]; i++) {
841 int eol;
842 for (eol = i; msg[eol] && msg[eol] != '\n'; eol++)
843 ; /* do nothing */
844
845 if (i == eol) {
846 break;
847 } else if (!prefixcmp(msg + i, "author ")) {
848 context->author.off = i + 7;
849 context->author.len = eol - i - 7;
850 } else if (!prefixcmp(msg + i, "committer ")) {
851 context->committer.off = i + 10;
852 context->committer.len = eol - i - 10;
853 }
854 i = eol;
855 }
856 context->message_off = i;
857 context->commit_header_parsed = 1;
858 }
859
860 static int istitlechar(char c)
861 {
862 return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') ||
863 (c >= '0' && c <= '9') || c == '.' || c == '_';
864 }
865
866 static void format_sanitized_subject(struct strbuf *sb, const char *msg)
867 {
868 size_t trimlen;
869 size_t start_len = sb->len;
870 int space = 2;
871
872 for (; *msg && *msg != '\n'; msg++) {
873 if (istitlechar(*msg)) {
874 if (space == 1)
875 strbuf_addch(sb, '-');
876 space = 0;
877 strbuf_addch(sb, *msg);
878 if (*msg == '.')
879 while (*(msg+1) == '.')
880 msg++;
881 } else
882 space |= 1;
883 }
884
885 /* trim any trailing '.' or '-' characters */
886 trimlen = 0;
887 while (sb->len - trimlen > start_len &&
888 (sb->buf[sb->len - 1 - trimlen] == '.'
889 || sb->buf[sb->len - 1 - trimlen] == '-'))
890 trimlen++;
891 strbuf_remove(sb, sb->len - trimlen, trimlen);
892 }
893
894 const char *format_subject(struct strbuf *sb, const char *msg,
895 const char *line_separator)
896 {
897 int first = 1;
898
899 for (;;) {
900 const char *line = msg;
901 int linelen = get_one_line(line);
902
903 msg += linelen;
904 if (!linelen || is_empty_line(line, &linelen))
905 break;
906
907 if (!sb)
908 continue;
909 strbuf_grow(sb, linelen + 2);
910 if (!first)
911 strbuf_addstr(sb, line_separator);
912 strbuf_add(sb, line, linelen);
913 first = 0;
914 }
915 return msg;
916 }
917
918 static void parse_commit_message(struct format_commit_context *c)
919 {
920 const char *msg = c->message + c->message_off;
921 const char *start = c->message;
922
923 msg = skip_empty_lines(msg);
924 c->subject_off = msg - start;
925
926 msg = format_subject(NULL, msg, NULL);
927 msg = skip_empty_lines(msg);
928 c->body_off = msg - start;
929
930 c->commit_message_parsed = 1;
931 }
932
933 static void strbuf_wrap(struct strbuf *sb, size_t pos,
934 size_t width, size_t indent1, size_t indent2)
935 {
936 struct strbuf tmp = STRBUF_INIT;
937
938 if (pos)
939 strbuf_add(&tmp, sb->buf, pos);
940 strbuf_add_wrapped_text(&tmp, sb->buf + pos,
941 (int) indent1, (int) indent2, (int) width);
942 strbuf_swap(&tmp, sb);
943 strbuf_release(&tmp);
944 }
945
946 static void rewrap_message_tail(struct strbuf *sb,
947 struct format_commit_context *c,
948 size_t new_width, size_t new_indent1,
949 size_t new_indent2)
950 {
951 if (c->width == new_width && c->indent1 == new_indent1 &&
952 c->indent2 == new_indent2)
953 return;
954 if (c->wrap_start < sb->len)
955 strbuf_wrap(sb, c->wrap_start, c->width, c->indent1, c->indent2);
956 c->wrap_start = sb->len;
957 c->width = new_width;
958 c->indent1 = new_indent1;
959 c->indent2 = new_indent2;
960 }
961
962 static int format_reflog_person(struct strbuf *sb,
963 char part,
964 struct reflog_walk_info *log,
965 enum date_mode dmode)
966 {
967 const char *ident;
968
969 if (!log)
970 return 2;
971
972 ident = get_reflog_ident(log);
973 if (!ident)
974 return 2;
975
976 return format_person_part(sb, part, ident, strlen(ident), dmode);
977 }
978
979 static size_t parse_color(struct strbuf *sb, /* in UTF-8 */
980 const char *placeholder,
981 struct format_commit_context *c)
982 {
983 if (placeholder[1] == '(') {
984 const char *begin = placeholder + 2;
985 const char *end = strchr(begin, ')');
986 char color[COLOR_MAXLEN];
987
988 if (!end)
989 return 0;
990 if (!prefixcmp(begin, "auto,")) {
991 if (!want_color(c->pretty_ctx->color))
992 return end - placeholder + 1;
993 begin += 5;
994 }
995 color_parse_mem(begin,
996 end - begin,
997 "--pretty format", color);
998 strbuf_addstr(sb, color);
999 return end - placeholder + 1;
1000 }
1001 if (!prefixcmp(placeholder + 1, "red")) {
1002 strbuf_addstr(sb, GIT_COLOR_RED);
1003 return 4;
1004 } else if (!prefixcmp(placeholder + 1, "green")) {
1005 strbuf_addstr(sb, GIT_COLOR_GREEN);
1006 return 6;
1007 } else if (!prefixcmp(placeholder + 1, "blue")) {
1008 strbuf_addstr(sb, GIT_COLOR_BLUE);
1009 return 5;
1010 } else if (!prefixcmp(placeholder + 1, "reset")) {
1011 strbuf_addstr(sb, GIT_COLOR_RESET);
1012 return 6;
1013 } else
1014 return 0;
1015 }
1016
1017 static size_t parse_padding_placeholder(struct strbuf *sb,
1018 const char *placeholder,
1019 struct format_commit_context *c)
1020 {
1021 const char *ch = placeholder;
1022 enum flush_type flush_type;
1023 int to_column = 0;
1024
1025 switch (*ch++) {
1026 case '<':
1027 flush_type = flush_right;
1028 break;
1029 case '>':
1030 if (*ch == '<') {
1031 flush_type = flush_both;
1032 ch++;
1033 } else if (*ch == '>') {
1034 flush_type = flush_left_and_steal;
1035 ch++;
1036 } else
1037 flush_type = flush_left;
1038 break;
1039 default:
1040 return 0;
1041 }
1042
1043 /* the next value means "wide enough to that column" */
1044 if (*ch == '|') {
1045 to_column = 1;
1046 ch++;
1047 }
1048
1049 if (*ch == '(') {
1050 const char *start = ch + 1;
1051 const char *end = start + strcspn(start, ",)");
1052 char *next;
1053 int width;
1054 if (!end || end == start)
1055 return 0;
1056 width = strtoul(start, &next, 10);
1057 if (next == start || width == 0)
1058 return 0;
1059 c->padding = to_column ? -width : width;
1060 c->flush_type = flush_type;
1061
1062 if (*end == ',') {
1063 start = end + 1;
1064 end = strchr(start, ')');
1065 if (!end || end == start)
1066 return 0;
1067 if (!prefixcmp(start, "trunc)"))
1068 c->truncate = trunc_right;
1069 else if (!prefixcmp(start, "ltrunc)"))
1070 c->truncate = trunc_left;
1071 else if (!prefixcmp(start, "mtrunc)"))
1072 c->truncate = trunc_middle;
1073 else
1074 return 0;
1075 } else
1076 c->truncate = trunc_none;
1077
1078 return end - placeholder + 1;
1079 }
1080 return 0;
1081 }
1082
1083 static size_t format_commit_one(struct strbuf *sb, /* in UTF-8 */
1084 const char *placeholder,
1085 void *context)
1086 {
1087 struct format_commit_context *c = context;
1088 const struct commit *commit = c->commit;
1089 const char *msg = c->message;
1090 struct commit_list *p;
1091 int h1, h2;
1092
1093 /* these are independent of the commit */
1094 switch (placeholder[0]) {
1095 case 'C':
1096 if (!prefixcmp(placeholder + 1, "(auto)")) {
1097 c->auto_color = 1;
1098 return 7; /* consumed 7 bytes, "C(auto)" */
1099 } else {
1100 int ret = parse_color(sb, placeholder, c);
1101 if (ret)
1102 c->auto_color = 0;
1103 /*
1104 * Otherwise, we decided to treat %C<unknown>
1105 * as a literal string, and the previous
1106 * %C(auto) is still valid.
1107 */
1108 return ret;
1109 }
1110 case 'n': /* newline */
1111 strbuf_addch(sb, '\n');
1112 return 1;
1113 case 'x':
1114 /* %x00 == NUL, %x0a == LF, etc. */
1115 if (0 <= (h1 = hexval_table[0xff & placeholder[1]]) &&
1116 h1 <= 16 &&
1117 0 <= (h2 = hexval_table[0xff & placeholder[2]]) &&
1118 h2 <= 16) {
1119 strbuf_addch(sb, (h1<<4)|h2);
1120 return 3;
1121 } else
1122 return 0;
1123 case 'w':
1124 if (placeholder[1] == '(') {
1125 unsigned long width = 0, indent1 = 0, indent2 = 0;
1126 char *next;
1127 const char *start = placeholder + 2;
1128 const char *end = strchr(start, ')');
1129 if (!end)
1130 return 0;
1131 if (end > start) {
1132 width = strtoul(start, &next, 10);
1133 if (*next == ',') {
1134 indent1 = strtoul(next + 1, &next, 10);
1135 if (*next == ',') {
1136 indent2 = strtoul(next + 1,
1137 &next, 10);
1138 }
1139 }
1140 if (*next != ')')
1141 return 0;
1142 }
1143 rewrap_message_tail(sb, c, width, indent1, indent2);
1144 return end - placeholder + 1;
1145 } else
1146 return 0;
1147
1148 case '<':
1149 case '>':
1150 return parse_padding_placeholder(sb, placeholder, c);
1151 }
1152
1153 /* these depend on the commit */
1154 if (!commit->object.parsed)
1155 parse_object(commit->object.sha1);
1156
1157 switch (placeholder[0]) {
1158 case 'H': /* commit hash */
1159 strbuf_addstr(sb, diff_get_color(c->auto_color, DIFF_COMMIT));
1160 strbuf_addstr(sb, sha1_to_hex(commit->object.sha1));
1161 strbuf_addstr(sb, diff_get_color(c->auto_color, DIFF_RESET));
1162 return 1;
1163 case 'h': /* abbreviated commit hash */
1164 strbuf_addstr(sb, diff_get_color(c->auto_color, DIFF_COMMIT));
1165 if (add_again(sb, &c->abbrev_commit_hash)) {
1166 strbuf_addstr(sb, diff_get_color(c->auto_color, DIFF_RESET));
1167 return 1;
1168 }
1169 strbuf_addstr(sb, find_unique_abbrev(commit->object.sha1,
1170 c->pretty_ctx->abbrev));
1171 strbuf_addstr(sb, diff_get_color(c->auto_color, DIFF_RESET));
1172 c->abbrev_commit_hash.len = sb->len - c->abbrev_commit_hash.off;
1173 return 1;
1174 case 'T': /* tree hash */
1175 strbuf_addstr(sb, sha1_to_hex(commit->tree->object.sha1));
1176 return 1;
1177 case 't': /* abbreviated tree hash */
1178 if (add_again(sb, &c->abbrev_tree_hash))
1179 return 1;
1180 strbuf_addstr(sb, find_unique_abbrev(commit->tree->object.sha1,
1181 c->pretty_ctx->abbrev));
1182 c->abbrev_tree_hash.len = sb->len - c->abbrev_tree_hash.off;
1183 return 1;
1184 case 'P': /* parent hashes */
1185 for (p = commit->parents; p; p = p->next) {
1186 if (p != commit->parents)
1187 strbuf_addch(sb, ' ');
1188 strbuf_addstr(sb, sha1_to_hex(p->item->object.sha1));
1189 }
1190 return 1;
1191 case 'p': /* abbreviated parent hashes */
1192 if (add_again(sb, &c->abbrev_parent_hashes))
1193 return 1;
1194 for (p = commit->parents; p; p = p->next) {
1195 if (p != commit->parents)
1196 strbuf_addch(sb, ' ');
1197 strbuf_addstr(sb, find_unique_abbrev(
1198 p->item->object.sha1,
1199 c->pretty_ctx->abbrev));
1200 }
1201 c->abbrev_parent_hashes.len = sb->len -
1202 c->abbrev_parent_hashes.off;
1203 return 1;
1204 case 'm': /* left/right/bottom */
1205 strbuf_addstr(sb, get_revision_mark(NULL, commit));
1206 return 1;
1207 case 'd':
1208 load_ref_decorations(DECORATE_SHORT_REFS);
1209 format_decorations(sb, commit, c->auto_color);
1210 return 1;
1211 case 'g': /* reflog info */
1212 switch(placeholder[1]) {
1213 case 'd': /* reflog selector */
1214 case 'D':
1215 if (c->pretty_ctx->reflog_info)
1216 get_reflog_selector(sb,
1217 c->pretty_ctx->reflog_info,
1218 c->pretty_ctx->date_mode,
1219 c->pretty_ctx->date_mode_explicit,
1220 (placeholder[1] == 'd'));
1221 return 2;
1222 case 's': /* reflog message */
1223 if (c->pretty_ctx->reflog_info)
1224 get_reflog_message(sb, c->pretty_ctx->reflog_info);
1225 return 2;
1226 case 'n':
1227 case 'N':
1228 case 'e':
1229 case 'E':
1230 return format_reflog_person(sb,
1231 placeholder[1],
1232 c->pretty_ctx->reflog_info,
1233 c->pretty_ctx->date_mode);
1234 }
1235 return 0; /* unknown %g placeholder */
1236 case 'N':
1237 if (c->pretty_ctx->notes_message) {
1238 strbuf_addstr(sb, c->pretty_ctx->notes_message);
1239 return 1;
1240 }
1241 return 0;
1242 }
1243
1244 if (placeholder[0] == 'G') {
1245 if (!c->signature_check.result)
1246 check_commit_signature(c->commit, &(c->signature_check));
1247 switch (placeholder[1]) {
1248 case 'G':
1249 if (c->signature_check.gpg_output)
1250 strbuf_addstr(sb, c->signature_check.gpg_output);
1251 break;
1252 case '?':
1253 switch (c->signature_check.result) {
1254 case 'G':
1255 case 'B':
1256 case 'U':
1257 case 'N':
1258 strbuf_addch(sb, c->signature_check.result);
1259 }
1260 break;
1261 case 'S':
1262 if (c->signature_check.signer)
1263 strbuf_addstr(sb, c->signature_check.signer);
1264 break;
1265 case 'K':
1266 if (c->signature_check.key)
1267 strbuf_addstr(sb, c->signature_check.key);
1268 break;
1269 }
1270 return 2;
1271 }
1272
1273
1274 /* For the rest we have to parse the commit header. */
1275 if (!c->commit_header_parsed)
1276 parse_commit_header(c);
1277
1278 switch (placeholder[0]) {
1279 case 'a': /* author ... */
1280 return format_person_part(sb, placeholder[1],
1281 msg + c->author.off, c->author.len,
1282 c->pretty_ctx->date_mode);
1283 case 'c': /* committer ... */
1284 return format_person_part(sb, placeholder[1],
1285 msg + c->committer.off, c->committer.len,
1286 c->pretty_ctx->date_mode);
1287 case 'e': /* encoding */
1288 if (c->commit_encoding)
1289 strbuf_addstr(sb, c->commit_encoding);
1290 return 1;
1291 case 'B': /* raw body */
1292 /* message_off is always left at the initial newline */
1293 strbuf_addstr(sb, msg + c->message_off + 1);
1294 return 1;
1295 }
1296
1297 /* Now we need to parse the commit message. */
1298 if (!c->commit_message_parsed)
1299 parse_commit_message(c);
1300
1301 switch (placeholder[0]) {
1302 case 's': /* subject */
1303 format_subject(sb, msg + c->subject_off, " ");
1304 return 1;
1305 case 'f': /* sanitized subject */
1306 format_sanitized_subject(sb, msg + c->subject_off);
1307 return 1;
1308 case 'b': /* body */
1309 strbuf_addstr(sb, msg + c->body_off);
1310 return 1;
1311 }
1312 return 0; /* unknown placeholder */
1313 }
1314
1315 static size_t format_and_pad_commit(struct strbuf *sb, /* in UTF-8 */
1316 const char *placeholder,
1317 struct format_commit_context *c)
1318 {
1319 struct strbuf local_sb = STRBUF_INIT;
1320 int total_consumed = 0, len, padding = c->padding;
1321 if (padding < 0) {
1322 const char *start = strrchr(sb->buf, '\n');
1323 int occupied;
1324 if (!start)
1325 start = sb->buf;
1326 occupied = utf8_strnwidth(start, -1, 1);
1327 padding = (-padding) - occupied;
1328 }
1329 while (1) {
1330 int modifier = *placeholder == 'C';
1331 int consumed = format_commit_one(&local_sb, placeholder, c);
1332 total_consumed += consumed;
1333
1334 if (!modifier)
1335 break;
1336
1337 placeholder += consumed;
1338 if (*placeholder != '%')
1339 break;
1340 placeholder++;
1341 total_consumed++;
1342 }
1343 len = utf8_strnwidth(local_sb.buf, -1, 1);
1344
1345 if (c->flush_type == flush_left_and_steal) {
1346 const char *ch = sb->buf + sb->len - 1;
1347 while (len > padding && ch > sb->buf) {
1348 const char *p;
1349 if (*ch == ' ') {
1350 ch--;
1351 padding++;
1352 continue;
1353 }
1354 /* check for trailing ansi sequences */
1355 if (*ch != 'm')
1356 break;
1357 p = ch - 1;
1358 while (ch - p < 10 && *p != '\033')
1359 p--;
1360 if (*p != '\033' ||
1361 ch + 1 - p != display_mode_esc_sequence_len(p))
1362 break;
1363 /*
1364 * got a good ansi sequence, put it back to
1365 * local_sb as we're cutting sb
1366 */
1367 strbuf_insert(&local_sb, 0, p, ch + 1 - p);
1368 ch = p - 1;
1369 }
1370 strbuf_setlen(sb, ch + 1 - sb->buf);
1371 c->flush_type = flush_left;
1372 }
1373
1374 if (len > padding) {
1375 switch (c->truncate) {
1376 case trunc_left:
1377 strbuf_utf8_replace(&local_sb,
1378 0, len - (padding - 2),
1379 "..");
1380 break;
1381 case trunc_middle:
1382 strbuf_utf8_replace(&local_sb,
1383 padding / 2 - 1,
1384 len - (padding - 2),
1385 "..");
1386 break;
1387 case trunc_right:
1388 strbuf_utf8_replace(&local_sb,
1389 padding - 2, len - (padding - 2),
1390 "..");
1391 break;
1392 case trunc_none:
1393 break;
1394 }
1395 strbuf_addstr(sb, local_sb.buf);
1396 } else {
1397 int sb_len = sb->len, offset = 0;
1398 if (c->flush_type == flush_left)
1399 offset = padding - len;
1400 else if (c->flush_type == flush_both)
1401 offset = (padding - len) / 2;
1402 /*
1403 * we calculate padding in columns, now
1404 * convert it back to chars
1405 */
1406 padding = padding - len + local_sb.len;
1407 strbuf_grow(sb, padding);
1408 strbuf_setlen(sb, sb_len + padding);
1409 memset(sb->buf + sb_len, ' ', sb->len - sb_len);
1410 memcpy(sb->buf + sb_len + offset, local_sb.buf,
1411 local_sb.len);
1412 }
1413 strbuf_release(&local_sb);
1414 c->flush_type = no_flush;
1415 return total_consumed;
1416 }
1417
1418 static size_t format_commit_item(struct strbuf *sb, /* in UTF-8 */
1419 const char *placeholder,
1420 void *context)
1421 {
1422 int consumed;
1423 size_t orig_len;
1424 enum {
1425 NO_MAGIC,
1426 ADD_LF_BEFORE_NON_EMPTY,
1427 DEL_LF_BEFORE_EMPTY,
1428 ADD_SP_BEFORE_NON_EMPTY
1429 } magic = NO_MAGIC;
1430
1431 switch (placeholder[0]) {
1432 case '-':
1433 magic = DEL_LF_BEFORE_EMPTY;
1434 break;
1435 case '+':
1436 magic = ADD_LF_BEFORE_NON_EMPTY;
1437 break;
1438 case ' ':
1439 magic = ADD_SP_BEFORE_NON_EMPTY;
1440 break;
1441 default:
1442 break;
1443 }
1444 if (magic != NO_MAGIC)
1445 placeholder++;
1446
1447 orig_len = sb->len;
1448 if (((struct format_commit_context *)context)->flush_type != no_flush)
1449 consumed = format_and_pad_commit(sb, placeholder, context);
1450 else
1451 consumed = format_commit_one(sb, placeholder, context);
1452 if (magic == NO_MAGIC)
1453 return consumed;
1454
1455 if ((orig_len == sb->len) && magic == DEL_LF_BEFORE_EMPTY) {
1456 while (sb->len && sb->buf[sb->len - 1] == '\n')
1457 strbuf_setlen(sb, sb->len - 1);
1458 } else if (orig_len != sb->len) {
1459 if (magic == ADD_LF_BEFORE_NON_EMPTY)
1460 strbuf_insert(sb, orig_len, "\n", 1);
1461 else if (magic == ADD_SP_BEFORE_NON_EMPTY)
1462 strbuf_insert(sb, orig_len, " ", 1);
1463 }
1464 return consumed + 1;
1465 }
1466
1467 static size_t userformat_want_item(struct strbuf *sb, const char *placeholder,
1468 void *context)
1469 {
1470 struct userformat_want *w = context;
1471
1472 if (*placeholder == '+' || *placeholder == '-' || *placeholder == ' ')
1473 placeholder++;
1474
1475 switch (*placeholder) {
1476 case 'N':
1477 w->notes = 1;
1478 break;
1479 }
1480 return 0;
1481 }
1482
1483 void userformat_find_requirements(const char *fmt, struct userformat_want *w)
1484 {
1485 struct strbuf dummy = STRBUF_INIT;
1486
1487 if (!fmt) {
1488 if (!user_format)
1489 return;
1490 fmt = user_format;
1491 }
1492 strbuf_expand(&dummy, fmt, userformat_want_item, w);
1493 strbuf_release(&dummy);
1494 }
1495
1496 void format_commit_message(const struct commit *commit,
1497 const char *format, struct strbuf *sb,
1498 const struct pretty_print_context *pretty_ctx)
1499 {
1500 struct format_commit_context context;
1501 const char *output_enc = pretty_ctx->output_encoding;
1502 const char *utf8 = "UTF-8";
1503
1504 memset(&context, 0, sizeof(context));
1505 context.commit = commit;
1506 context.pretty_ctx = pretty_ctx;
1507 context.wrap_start = sb->len;
1508 context.message = logmsg_reencode(commit,
1509 &context.commit_encoding,
1510 output_enc);
1511
1512 strbuf_expand(sb, format, format_commit_item, &context);
1513 rewrap_message_tail(sb, &context, 0, 0, 0);
1514
1515 if (output_enc) {
1516 if (same_encoding(utf8, output_enc))
1517 output_enc = NULL;
1518 } else {
1519 if (context.commit_encoding &&
1520 !same_encoding(context.commit_encoding, utf8))
1521 output_enc = context.commit_encoding;
1522 }
1523
1524 if (output_enc) {
1525 int outsz;
1526 char *out = reencode_string_len(sb->buf, sb->len,
1527 output_enc, utf8, &outsz);
1528 if (out)
1529 strbuf_attach(sb, out, outsz, outsz + 1);
1530 }
1531
1532 free(context.commit_encoding);
1533 logmsg_free(context.message, commit);
1534 free(context.signature_check.gpg_output);
1535 free(context.signature_check.signer);
1536 }
1537
1538 static void pp_header(const struct pretty_print_context *pp,
1539 const char *encoding,
1540 const struct commit *commit,
1541 const char **msg_p,
1542 struct strbuf *sb)
1543 {
1544 int parents_shown = 0;
1545
1546 for (;;) {
1547 const char *line = *msg_p;
1548 int linelen = get_one_line(*msg_p);
1549
1550 if (!linelen)
1551 return;
1552 *msg_p += linelen;
1553
1554 if (linelen == 1)
1555 /* End of header */
1556 return;
1557
1558 if (pp->fmt == CMIT_FMT_RAW) {
1559 strbuf_add(sb, line, linelen);
1560 continue;
1561 }
1562
1563 if (!prefixcmp(line, "parent ")) {
1564 if (linelen != 48)
1565 die("bad parent line in commit");
1566 continue;
1567 }
1568
1569 if (!parents_shown) {
1570 struct commit_list *parent;
1571 int num;
1572 for (parent = commit->parents, num = 0;
1573 parent;
1574 parent = parent->next, num++)
1575 ;
1576 /* with enough slop */
1577 strbuf_grow(sb, num * 50 + 20);
1578 add_merge_info(pp, sb, commit);
1579 parents_shown = 1;
1580 }
1581
1582 /*
1583 * MEDIUM == DEFAULT shows only author with dates.
1584 * FULL shows both authors but not dates.
1585 * FULLER shows both authors and dates.
1586 */
1587 if (!prefixcmp(line, "author ")) {
1588 strbuf_grow(sb, linelen + 80);
1589 pp_user_info(pp, "Author", sb, line + 7, encoding);
1590 }
1591 if (!prefixcmp(line, "committer ") &&
1592 (pp->fmt == CMIT_FMT_FULL || pp->fmt == CMIT_FMT_FULLER)) {
1593 strbuf_grow(sb, linelen + 80);
1594 pp_user_info(pp, "Commit", sb, line + 10, encoding);
1595 }
1596 }
1597 }
1598
1599 void pp_title_line(const struct pretty_print_context *pp,
1600 const char **msg_p,
1601 struct strbuf *sb,
1602 const char *encoding,
1603 int need_8bit_cte)
1604 {
1605 static const int max_length = 78; /* per rfc2047 */
1606 struct strbuf title;
1607
1608 strbuf_init(&title, 80);
1609 *msg_p = format_subject(&title, *msg_p,
1610 pp->preserve_subject ? "\n" : " ");
1611
1612 strbuf_grow(sb, title.len + 1024);
1613 if (pp->subject) {
1614 strbuf_addstr(sb, pp->subject);
1615 if (needs_rfc2047_encoding(title.buf, title.len, RFC2047_SUBJECT))
1616 add_rfc2047(sb, title.buf, title.len,
1617 encoding, RFC2047_SUBJECT);
1618 else
1619 strbuf_add_wrapped_bytes(sb, title.buf, title.len,
1620 -last_line_length(sb), 1, max_length);
1621 } else {
1622 strbuf_addbuf(sb, &title);
1623 }
1624 strbuf_addch(sb, '\n');
1625
1626 if (need_8bit_cte > 0) {
1627 const char *header_fmt =
1628 "MIME-Version: 1.0\n"
1629 "Content-Type: text/plain; charset=%s\n"
1630 "Content-Transfer-Encoding: 8bit\n";
1631 strbuf_addf(sb, header_fmt, encoding);
1632 }
1633 if (pp->after_subject) {
1634 strbuf_addstr(sb, pp->after_subject);
1635 }
1636 if (pp->fmt == CMIT_FMT_EMAIL) {
1637 strbuf_addch(sb, '\n');
1638 }
1639 strbuf_release(&title);
1640 }
1641
1642 void pp_remainder(const struct pretty_print_context *pp,
1643 const char **msg_p,
1644 struct strbuf *sb,
1645 int indent)
1646 {
1647 int first = 1;
1648 for (;;) {
1649 const char *line = *msg_p;
1650 int linelen = get_one_line(line);
1651 *msg_p += linelen;
1652
1653 if (!linelen)
1654 break;
1655
1656 if (is_empty_line(line, &linelen)) {
1657 if (first)
1658 continue;
1659 if (pp->fmt == CMIT_FMT_SHORT)
1660 break;
1661 }
1662 first = 0;
1663
1664 strbuf_grow(sb, linelen + indent + 20);
1665 if (indent) {
1666 memset(sb->buf + sb->len, ' ', indent);
1667 strbuf_setlen(sb, sb->len + indent);
1668 }
1669 strbuf_add(sb, line, linelen);
1670 strbuf_addch(sb, '\n');
1671 }
1672 }
1673
1674 void pretty_print_commit(const struct pretty_print_context *pp,
1675 const struct commit *commit,
1676 struct strbuf *sb)
1677 {
1678 unsigned long beginning_of_body;
1679 int indent = 4;
1680 const char *msg;
1681 char *reencoded;
1682 const char *encoding;
1683 int need_8bit_cte = pp->need_8bit_cte;
1684
1685 if (pp->fmt == CMIT_FMT_USERFORMAT) {
1686 format_commit_message(commit, user_format, sb, pp);
1687 return;
1688 }
1689
1690 encoding = get_log_output_encoding();
1691 msg = reencoded = logmsg_reencode(commit, NULL, encoding);
1692
1693 if (pp->fmt == CMIT_FMT_ONELINE || pp->fmt == CMIT_FMT_EMAIL)
1694 indent = 0;
1695
1696 /*
1697 * We need to check and emit Content-type: to mark it
1698 * as 8-bit if we haven't done so.
1699 */
1700 if (pp->fmt == CMIT_FMT_EMAIL && need_8bit_cte == 0) {
1701 int i, ch, in_body;
1702
1703 for (in_body = i = 0; (ch = msg[i]); i++) {
1704 if (!in_body) {
1705 /* author could be non 7-bit ASCII but
1706 * the log may be so; skip over the
1707 * header part first.
1708 */
1709 if (ch == '\n' && msg[i+1] == '\n')
1710 in_body = 1;
1711 }
1712 else if (non_ascii(ch)) {
1713 need_8bit_cte = 1;
1714 break;
1715 }
1716 }
1717 }
1718
1719 pp_header(pp, encoding, commit, &msg, sb);
1720 if (pp->fmt != CMIT_FMT_ONELINE && !pp->subject) {
1721 strbuf_addch(sb, '\n');
1722 }
1723
1724 /* Skip excess blank lines at the beginning of body, if any... */
1725 msg = skip_empty_lines(msg);
1726
1727 /* These formats treat the title line specially. */
1728 if (pp->fmt == CMIT_FMT_ONELINE || pp->fmt == CMIT_FMT_EMAIL)
1729 pp_title_line(pp, &msg, sb, encoding, need_8bit_cte);
1730
1731 beginning_of_body = sb->len;
1732 if (pp->fmt != CMIT_FMT_ONELINE)
1733 pp_remainder(pp, &msg, sb, indent);
1734 strbuf_rtrim(sb);
1735
1736 /* Make sure there is an EOLN for the non-oneline case */
1737 if (pp->fmt != CMIT_FMT_ONELINE)
1738 strbuf_addch(sb, '\n');
1739
1740 /*
1741 * The caller may append additional body text in e-mail
1742 * format. Make sure we did not strip the blank line
1743 * between the header and the body.
1744 */
1745 if (pp->fmt == CMIT_FMT_EMAIL && sb->len <= beginning_of_body)
1746 strbuf_addch(sb, '\n');
1747
1748 logmsg_free(reencoded, commit);
1749 }
1750
1751 void pp_commit_easy(enum cmit_fmt fmt, const struct commit *commit,
1752 struct strbuf *sb)
1753 {
1754 struct pretty_print_context pp = {0};
1755 pp.fmt = fmt;
1756 pretty_print_commit(&pp, commit, sb);
1757 }
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