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Merge branch 'jc/doc-single-h-is-for-help' into maint
[alt-git.git] / pretty.c
blob305e903192a7ae4fb125090436130f434bd46e7c
1 #include "cache.h"
2 #include "config.h"
3 #include "commit.h"
4 #include "utf8.h"
5 #include "diff.h"
6 #include "revision.h"
7 #include "string-list.h"
8 #include "mailmap.h"
9 #include "log-tree.h"
10 #include "notes.h"
11 #include "color.h"
12 #include "reflog-walk.h"
13 #include "gpg-interface.h"
14 #include "trailer.h"
15
16 static char *user_format;
17 static struct cmt_fmt_map {
18 const char *name;
19 enum cmit_fmt format;
20 int is_tformat;
21 int expand_tabs_in_log;
22 int is_alias;
23 enum date_mode_type default_date_mode_type;
24 const char *user_format;
25 } *commit_formats;
26 static size_t builtin_formats_len;
27 static size_t commit_formats_len;
28 static size_t commit_formats_alloc;
29 static struct cmt_fmt_map *find_commit_format(const char *sought);
30
31 int commit_format_is_empty(enum cmit_fmt fmt)
32 {
33 return fmt == CMIT_FMT_USERFORMAT && !*user_format;
34 }
35
36 static void save_user_format(struct rev_info *rev, const char *cp, int is_tformat)
37 {
38 free(user_format);
39 user_format = xstrdup(cp);
40 if (is_tformat)
41 rev->use_terminator = 1;
42 rev->commit_format = CMIT_FMT_USERFORMAT;
43 }
44
45 static int git_pretty_formats_config(const char *var, const char *value, void *cb)
46 {
47 struct cmt_fmt_map *commit_format = NULL;
48 const char *name;
49 const char *fmt;
50 int i;
51
52 if (!skip_prefix(var, "pretty.", &name))
53 return 0;
54
55 for (i = 0; i < builtin_formats_len; i++) {
56 if (!strcmp(commit_formats[i].name, name))
57 return 0;
58 }
59
60 for (i = builtin_formats_len; i < commit_formats_len; i++) {
61 if (!strcmp(commit_formats[i].name, name)) {
62 commit_format = &commit_formats[i];
63 break;
64 }
65 }
66
67 if (!commit_format) {
68 ALLOC_GROW(commit_formats, commit_formats_len+1,
69 commit_formats_alloc);
70 commit_format = &commit_formats[commit_formats_len];
71 memset(commit_format, 0, sizeof(*commit_format));
72 commit_formats_len++;
73 }
74
75 commit_format->name = xstrdup(name);
76 commit_format->format = CMIT_FMT_USERFORMAT;
77 if (git_config_string(&fmt, var, value))
78 return -1;
79
80 if (skip_prefix(fmt, "format:", &fmt))
81 commit_format->is_tformat = 0;
82 else if (skip_prefix(fmt, "tformat:", &fmt) || strchr(fmt, '%'))
83 commit_format->is_tformat = 1;
84 else
85 commit_format->is_alias = 1;
86 commit_format->user_format = fmt;
87
88 return 0;
89 }
90
91 static void setup_commit_formats(void)
92 {
93 struct cmt_fmt_map builtin_formats[] = {
94 { "raw", CMIT_FMT_RAW, 0, 0 },
95 { "medium", CMIT_FMT_MEDIUM, 0, 8 },
96 { "short", CMIT_FMT_SHORT, 0, 0 },
97 { "email", CMIT_FMT_EMAIL, 0, 0 },
98 { "mboxrd", CMIT_FMT_MBOXRD, 0, 0 },
99 { "fuller", CMIT_FMT_FULLER, 0, 8 },
100 { "full", CMIT_FMT_FULL, 0, 8 },
101 { "oneline", CMIT_FMT_ONELINE, 1, 0 },
102 { "reference", CMIT_FMT_USERFORMAT, 1, 0,
103 0, DATE_SHORT, "%C(auto)%h (%s, %ad)" },
104 /*
105 * Please update $__git_log_pretty_formats in
106 * git-completion.bash when you add new formats.
107 */
108 };
109 commit_formats_len = ARRAY_SIZE(builtin_formats);
110 builtin_formats_len = commit_formats_len;
111 ALLOC_GROW(commit_formats, commit_formats_len, commit_formats_alloc);
112 COPY_ARRAY(commit_formats, builtin_formats,
113 ARRAY_SIZE(builtin_formats));
114
115 git_config(git_pretty_formats_config, NULL);
116 }
117
118 static struct cmt_fmt_map *find_commit_format_recursive(const char *sought,
119 const char *original,
120 int num_redirections)
121 {
122 struct cmt_fmt_map *found = NULL;
123 size_t found_match_len = 0;
124 int i;
125
126 if (num_redirections >= commit_formats_len)
127 die("invalid --pretty format: "
128 "'%s' references an alias which points to itself",
129 original);
130
131 for (i = 0; i < commit_formats_len; i++) {
132 size_t match_len;
133
134 if (!starts_with(commit_formats[i].name, sought))
135 continue;
136
137 match_len = strlen(commit_formats[i].name);
138 if (found == NULL || found_match_len > match_len) {
139 found = &commit_formats[i];
140 found_match_len = match_len;
141 }
142 }
143
144 if (found && found->is_alias) {
145 found = find_commit_format_recursive(found->user_format,
146 original,
147 num_redirections+1);
148 }
149
150 return found;
151 }
152
153 static struct cmt_fmt_map *find_commit_format(const char *sought)
154 {
155 if (!commit_formats)
156 setup_commit_formats();
157
158 return find_commit_format_recursive(sought, sought, 0);
159 }
160
161 void get_commit_format(const char *arg, struct rev_info *rev)
162 {
163 struct cmt_fmt_map *commit_format;
164
165 rev->use_terminator = 0;
166 if (!arg) {
167 rev->commit_format = CMIT_FMT_DEFAULT;
168 return;
169 }
170 if (skip_prefix(arg, "format:", &arg)) {
171 save_user_format(rev, arg, 0);
172 return;
173 }
174
175 if (!*arg || skip_prefix(arg, "tformat:", &arg) || strchr(arg, '%')) {
176 save_user_format(rev, arg, 1);
177 return;
178 }
179
180 commit_format = find_commit_format(arg);
181 if (!commit_format)
182 die("invalid --pretty format: %s", arg);
183
184 rev->commit_format = commit_format->format;
185 rev->use_terminator = commit_format->is_tformat;
186 rev->expand_tabs_in_log_default = commit_format->expand_tabs_in_log;
187 if (!rev->date_mode_explicit && commit_format->default_date_mode_type)
188 rev->date_mode.type = commit_format->default_date_mode_type;
189 if (commit_format->format == CMIT_FMT_USERFORMAT) {
190 save_user_format(rev, commit_format->user_format,
191 commit_format->is_tformat);
192 }
193 }
194
195 /*
196 * Generic support for pretty-printing the header
197 */
198 static int get_one_line(const char *msg)
199 {
200 int ret = 0;
201
202 for (;;) {
203 char c = *msg++;
204 if (!c)
205 break;
206 ret++;
207 if (c == '\n')
208 break;
209 }
210 return ret;
211 }
212
213 /* High bit set, or ISO-2022-INT */
214 static int non_ascii(int ch)
215 {
216 return !isascii(ch) || ch == '\033';
217 }
218
219 int has_non_ascii(const char *s)
220 {
221 int ch;
222 if (!s)
223 return 0;
224 while ((ch = *s++) != '\0') {
225 if (non_ascii(ch))
226 return 1;
227 }
228 return 0;
229 }
230
231 static int is_rfc822_special(char ch)
232 {
233 switch (ch) {
234 case '(':
235 case ')':
236 case '<':
237 case '>':
238 case '[':
239 case ']':
240 case ':':
241 case ';':
242 case '@':
243 case ',':
244 case '.':
245 case '"':
246 case '\\':
247 return 1;
248 default:
249 return 0;
250 }
251 }
252
253 static int needs_rfc822_quoting(const char *s, int len)
254 {
255 int i;
256 for (i = 0; i < len; i++)
257 if (is_rfc822_special(s[i]))
258 return 1;
259 return 0;
260 }
261
262 static int last_line_length(struct strbuf *sb)
263 {
264 int i;
265
266 /* How many bytes are already used on the last line? */
267 for (i = sb->len - 1; i >= 0; i--)
268 if (sb->buf[i] == '\n')
269 break;
270 return sb->len - (i + 1);
271 }
272
273 static void add_rfc822_quoted(struct strbuf *out, const char *s, int len)
274 {
275 int i;
276
277 /* just a guess, we may have to also backslash-quote */
278 strbuf_grow(out, len + 2);
279
280 strbuf_addch(out, '"');
281 for (i = 0; i < len; i++) {
282 switch (s[i]) {
283 case '"':
284 case '\\':
285 strbuf_addch(out, '\\');
286 /* fall through */
287 default:
288 strbuf_addch(out, s[i]);
289 }
290 }
291 strbuf_addch(out, '"');
292 }
293
294 enum rfc2047_type {
295 RFC2047_SUBJECT,
296 RFC2047_ADDRESS
297 };
298
299 static int is_rfc2047_special(char ch, enum rfc2047_type type)
300 {
301 /*
302 * rfc2047, section 4.2:
303 *
304 * 8-bit values which correspond to printable ASCII characters other
305 * than "=", "?", and "_" (underscore), MAY be represented as those
306 * characters. (But see section 5 for restrictions.) In
307 * particular, SPACE and TAB MUST NOT be represented as themselves
308 * within encoded words.
309 */
310
311 /*
312 * rule out non-ASCII characters and non-printable characters (the
313 * non-ASCII check should be redundant as isprint() is not localized
314 * and only knows about ASCII, but be defensive about that)
315 */
316 if (non_ascii(ch) || !isprint(ch))
317 return 1;
318
319 /*
320 * rule out special printable characters (' ' should be the only
321 * whitespace character considered printable, but be defensive and use
322 * isspace())
323 */
324 if (isspace(ch) || ch == '=' || ch == '?' || ch == '_')
325 return 1;
326
327 /*
328 * rfc2047, section 5.3:
329 *
330 * As a replacement for a 'word' entity within a 'phrase', for example,
331 * one that precedes an address in a From, To, or Cc header. The ABNF
332 * definition for 'phrase' from RFC 822 thus becomes:
333 *
334 * phrase = 1*( encoded-word / word )
335 *
336 * In this case the set of characters that may be used in a "Q"-encoded
337 * 'encoded-word' is restricted to: <upper and lower case ASCII
338 * letters, decimal digits, "!", "*", "+", "-", "/", "=", and "_"
339 * (underscore, ASCII 95.)>. An 'encoded-word' that appears within a
340 * 'phrase' MUST be separated from any adjacent 'word', 'text' or
341 * 'special' by 'linear-white-space'.
342 */
343
344 if (type != RFC2047_ADDRESS)
345 return 0;
346
347 /* '=' and '_' are special cases and have been checked above */
348 return !(isalnum(ch) || ch == '!' || ch == '*' || ch == '+' || ch == '-' || ch == '/');
349 }
350
351 static int needs_rfc2047_encoding(const char *line, int len)
352 {
353 int i;
354
355 for (i = 0; i < len; i++) {
356 int ch = line[i];
357 if (non_ascii(ch) || ch == '\n')
358 return 1;
359 if ((i + 1 < len) && (ch == '=' && line[i+1] == '?'))
360 return 1;
361 }
362
363 return 0;
364 }
365
366 static void add_rfc2047(struct strbuf *sb, const char *line, size_t len,
367 const char *encoding, enum rfc2047_type type)
368 {
369 static const int max_encoded_length = 76; /* per rfc2047 */
370 int i;
371 int line_len = last_line_length(sb);
372
373 strbuf_grow(sb, len * 3 + strlen(encoding) + 100);
374 strbuf_addf(sb, "=?%s?q?", encoding);
375 line_len += strlen(encoding) + 5; /* 5 for =??q? */
376
377 while (len) {
378 /*
379 * RFC 2047, section 5 (3):
380 *
381 * Each 'encoded-word' MUST represent an integral number of
382 * characters. A multi-octet character may not be split across
383 * adjacent 'encoded- word's.
384 */
385 const unsigned char *p = (const unsigned char *)line;
386 int chrlen = mbs_chrlen(&line, &len, encoding);
387 int is_special = (chrlen > 1) || is_rfc2047_special(*p, type);
388
389 /* "=%02X" * chrlen, or the byte itself */
390 const char *encoded_fmt = is_special ? "=%02X" : "%c";
391 int encoded_len = is_special ? 3 * chrlen : 1;
392
393 /*
394 * According to RFC 2047, we could encode the special character
395 * ' ' (space) with '_' (underscore) for readability. But many
396 * programs do not understand this and just leave the
397 * underscore in place. Thus, we do nothing special here, which
398 * causes ' ' to be encoded as '=20', avoiding this problem.
399 */
400
401 if (line_len + encoded_len + 2 > max_encoded_length) {
402 /* It won't fit with trailing "?=" --- break the line */
403 strbuf_addf(sb, "?=\n =?%s?q?", encoding);
404 line_len = strlen(encoding) + 5 + 1; /* =??q? plus SP */
405 }
406
407 for (i = 0; i < chrlen; i++)
408 strbuf_addf(sb, encoded_fmt, p[i]);
409 line_len += encoded_len;
410 }
411 strbuf_addstr(sb, "?=");
412 }
413
414 const char *show_ident_date(const struct ident_split *ident,
415 const struct date_mode *mode)
416 {
417 timestamp_t date = 0;
418 long tz = 0;
419
420 if (ident->date_begin && ident->date_end)
421 date = parse_timestamp(ident->date_begin, NULL, 10);
422 if (date_overflows(date))
423 date = 0;
424 else {
425 if (ident->tz_begin && ident->tz_end)
426 tz = strtol(ident->tz_begin, NULL, 10);
427 if (tz >= INT_MAX || tz <= INT_MIN)
428 tz = 0;
429 }
430 return show_date(date, tz, mode);
431 }
432
433 void pp_user_info(struct pretty_print_context *pp,
434 const char *what, struct strbuf *sb,
435 const char *line, const char *encoding)
436 {
437 struct ident_split ident;
438 char *line_end;
439 const char *mailbuf, *namebuf;
440 size_t namelen, maillen;
441 int max_length = 78; /* per rfc2822 */
442
443 if (pp->fmt == CMIT_FMT_ONELINE)
444 return;
445
446 line_end = strchrnul(line, '\n');
447 if (split_ident_line(&ident, line, line_end - line))
448 return;
449
450 mailbuf = ident.mail_begin;
451 maillen = ident.mail_end - ident.mail_begin;
452 namebuf = ident.name_begin;
453 namelen = ident.name_end - ident.name_begin;
454
455 if (pp->mailmap)
456 map_user(pp->mailmap, &mailbuf, &maillen, &namebuf, &namelen);
457
458 if (cmit_fmt_is_mail(pp->fmt)) {
459 if (pp->from_ident && ident_cmp(pp->from_ident, &ident)) {
460 struct strbuf buf = STRBUF_INIT;
461
462 strbuf_addstr(&buf, "From: ");
463 strbuf_add(&buf, namebuf, namelen);
464 strbuf_addstr(&buf, " <");
465 strbuf_add(&buf, mailbuf, maillen);
466 strbuf_addstr(&buf, ">\n");
467 string_list_append(&pp->in_body_headers,
468 strbuf_detach(&buf, NULL));
469
470 mailbuf = pp->from_ident->mail_begin;
471 maillen = pp->from_ident->mail_end - mailbuf;
472 namebuf = pp->from_ident->name_begin;
473 namelen = pp->from_ident->name_end - namebuf;
474 }
475
476 strbuf_addstr(sb, "From: ");
477 if (needs_rfc2047_encoding(namebuf, namelen)) {
478 add_rfc2047(sb, namebuf, namelen,
479 encoding, RFC2047_ADDRESS);
480 max_length = 76; /* per rfc2047 */
481 } else if (needs_rfc822_quoting(namebuf, namelen)) {
482 struct strbuf quoted = STRBUF_INIT;
483 add_rfc822_quoted(&quoted, namebuf, namelen);
484 strbuf_add_wrapped_bytes(sb, quoted.buf, quoted.len,
485 -6, 1, max_length);
486 strbuf_release(&quoted);
487 } else {
488 strbuf_add_wrapped_bytes(sb, namebuf, namelen,
489 -6, 1, max_length);
490 }
491
492 if (max_length <
493 last_line_length(sb) + strlen(" <") + maillen + strlen(">"))
494 strbuf_addch(sb, '\n');
495 strbuf_addf(sb, " <%.*s>\n", (int)maillen, mailbuf);
496 } else {
497 strbuf_addf(sb, "%s: %.*s%.*s <%.*s>\n", what,
498 (pp->fmt == CMIT_FMT_FULLER) ? 4 : 0, " ",
499 (int)namelen, namebuf, (int)maillen, mailbuf);
500 }
501
502 switch (pp->fmt) {
503 case CMIT_FMT_MEDIUM:
504 strbuf_addf(sb, "Date: %s\n",
505 show_ident_date(&ident, &pp->date_mode));
506 break;
507 case CMIT_FMT_EMAIL:
508 case CMIT_FMT_MBOXRD:
509 strbuf_addf(sb, "Date: %s\n",
510 show_ident_date(&ident, DATE_MODE(RFC2822)));
511 break;
512 case CMIT_FMT_FULLER:
513 strbuf_addf(sb, "%sDate: %s\n", what,
514 show_ident_date(&ident, &pp->date_mode));
515 break;
516 default:
517 /* notin' */
518 break;
519 }
520 }
521
522 static int is_blank_line(const char *line, int *len_p)
523 {
524 int len = *len_p;
525 while (len && isspace(line[len - 1]))
526 len--;
527 *len_p = len;
528 return !len;
529 }
530
531 const char *skip_blank_lines(const char *msg)
532 {
533 for (;;) {
534 int linelen = get_one_line(msg);
535 int ll = linelen;
536 if (!linelen)
537 break;
538 if (!is_blank_line(msg, &ll))
539 break;
540 msg += linelen;
541 }
542 return msg;
543 }
544
545 static void add_merge_info(const struct pretty_print_context *pp,
546 struct strbuf *sb, const struct commit *commit)
547 {
548 struct commit_list *parent = commit->parents;
549
550 if ((pp->fmt == CMIT_FMT_ONELINE) || (cmit_fmt_is_mail(pp->fmt)) ||
551 !parent || !parent->next)
552 return;
553
554 strbuf_addstr(sb, "Merge:");
555
556 while (parent) {
557 struct object_id *oidp = &parent->item->object.oid;
558 strbuf_addch(sb, ' ');
559 if (pp->abbrev)
560 strbuf_add_unique_abbrev(sb, oidp, pp->abbrev);
561 else
562 strbuf_addstr(sb, oid_to_hex(oidp));
563 parent = parent->next;
564 }
565 strbuf_addch(sb, '\n');
566 }
567
568 static char *get_header(const char *msg, const char *key)
569 {
570 size_t len;
571 const char *v = find_commit_header(msg, key, &len);
572 return v ? xmemdupz(v, len) : NULL;
573 }
574
575 static char *replace_encoding_header(char *buf, const char *encoding)
576 {
577 struct strbuf tmp = STRBUF_INIT;
578 size_t start, len;
579 char *cp = buf;
580
581 /* guess if there is an encoding header before a \n\n */
582 while (!starts_with(cp, "encoding ")) {
583 cp = strchr(cp, '\n');
584 if (!cp || *++cp == '\n')
585 return buf;
586 }
587 start = cp - buf;
588 cp = strchr(cp, '\n');
589 if (!cp)
590 return buf; /* should not happen but be defensive */
591 len = cp + 1 - (buf + start);
592
593 strbuf_attach(&tmp, buf, strlen(buf), strlen(buf) + 1);
594 if (is_encoding_utf8(encoding)) {
595 /* we have re-coded to UTF-8; drop the header */
596 strbuf_remove(&tmp, start, len);
597 } else {
598 /* just replaces XXXX in 'encoding XXXX\n' */
599 strbuf_splice(&tmp, start + strlen("encoding "),
600 len - strlen("encoding \n"),
601 encoding, strlen(encoding));
602 }
603 return strbuf_detach(&tmp, NULL);
604 }
605
606 const char *repo_logmsg_reencode(struct repository *r,
607 const struct commit *commit,
608 char **commit_encoding,
609 const char *output_encoding)
610 {
611 static const char *utf8 = "UTF-8";
612 const char *use_encoding;
613 char *encoding;
614 const char *msg = repo_get_commit_buffer(r, commit, NULL);
615 char *out;
616
617 if (!output_encoding || !*output_encoding) {
618 if (commit_encoding)
619 *commit_encoding = get_header(msg, "encoding");
620 return msg;
621 }
622 encoding = get_header(msg, "encoding");
623 if (commit_encoding)
624 *commit_encoding = encoding;
625 use_encoding = encoding ? encoding : utf8;
626 if (same_encoding(use_encoding, output_encoding)) {
627 /*
628 * No encoding work to be done. If we have no encoding header
629 * at all, then there's nothing to do, and we can return the
630 * message verbatim (whether newly allocated or not).
631 */
632 if (!encoding)
633 return msg;
634
635 /*
636 * Otherwise, we still want to munge the encoding header in the
637 * result, which will be done by modifying the buffer. If we
638 * are using a fresh copy, we can reuse it. But if we are using
639 * the cached copy from get_commit_buffer, we need to duplicate it
640 * to avoid munging the cached copy.
641 */
642 if (msg == get_cached_commit_buffer(r, commit, NULL))
643 out = xstrdup(msg);
644 else
645 out = (char *)msg;
646 }
647 else {
648 /*
649 * There's actual encoding work to do. Do the reencoding, which
650 * still leaves the header to be replaced in the next step. At
651 * this point, we are done with msg. If we allocated a fresh
652 * copy, we can free it.
653 */
654 out = reencode_string(msg, output_encoding, use_encoding);
655 if (out)
656 repo_unuse_commit_buffer(r, commit, msg);
657 }
658
659 /*
660 * This replacement actually consumes the buffer we hand it, so we do
661 * not have to worry about freeing the old "out" here.
662 */
663 if (out)
664 out = replace_encoding_header(out, output_encoding);
665
666 if (!commit_encoding)
667 free(encoding);
668 /*
669 * If the re-encoding failed, out might be NULL here; in that
670 * case we just return the commit message verbatim.
671 */
672 return out ? out : msg;
673 }
674
675 static int mailmap_name(const char **email, size_t *email_len,
676 const char **name, size_t *name_len)
677 {
678 static struct string_list *mail_map;
679 if (!mail_map) {
680 mail_map = xcalloc(1, sizeof(*mail_map));
681 read_mailmap(mail_map, NULL);
682 }
683 return mail_map->nr && map_user(mail_map, email, email_len, name, name_len);
684 }
685
686 static size_t format_person_part(struct strbuf *sb, char part,
687 const char *msg, int len,
688 const struct date_mode *dmode)
689 {
690 /* currently all placeholders have same length */
691 const int placeholder_len = 2;
692 struct ident_split s;
693 const char *name, *mail;
694 size_t maillen, namelen;
695
696 if (split_ident_line(&s, msg, len) < 0)
697 goto skip;
698
699 name = s.name_begin;
700 namelen = s.name_end - s.name_begin;
701 mail = s.mail_begin;
702 maillen = s.mail_end - s.mail_begin;
703
704 if (part == 'N' || part == 'E' || part == 'L') /* mailmap lookup */
705 mailmap_name(&mail, &maillen, &name, &namelen);
706 if (part == 'n' || part == 'N') { /* name */
707 strbuf_add(sb, name, namelen);
708 return placeholder_len;
709 }
710 if (part == 'e' || part == 'E') { /* email */
711 strbuf_add(sb, mail, maillen);
712 return placeholder_len;
713 }
714 if (part == 'l' || part == 'L') { /* local-part */
715 const char *at = memchr(mail, '@', maillen);
716 if (at)
717 maillen = at - mail;
718 strbuf_add(sb, mail, maillen);
719 return placeholder_len;
720 }
721
722 if (!s.date_begin)
723 goto skip;
724
725 if (part == 't') { /* date, UNIX timestamp */
726 strbuf_add(sb, s.date_begin, s.date_end - s.date_begin);
727 return placeholder_len;
728 }
729
730 switch (part) {
731 case 'd': /* date */
732 strbuf_addstr(sb, show_ident_date(&s, dmode));
733 return placeholder_len;
734 case 'D': /* date, RFC2822 style */
735 strbuf_addstr(sb, show_ident_date(&s, DATE_MODE(RFC2822)));
736 return placeholder_len;
737 case 'r': /* date, relative */
738 strbuf_addstr(sb, show_ident_date(&s, DATE_MODE(RELATIVE)));
739 return placeholder_len;
740 case 'i': /* date, ISO 8601-like */
741 strbuf_addstr(sb, show_ident_date(&s, DATE_MODE(ISO8601)));
742 return placeholder_len;
743 case 'I': /* date, ISO 8601 strict */
744 strbuf_addstr(sb, show_ident_date(&s, DATE_MODE(ISO8601_STRICT)));
745 return placeholder_len;
746 case 's':
747 strbuf_addstr(sb, show_ident_date(&s, DATE_MODE(SHORT)));
748 return placeholder_len;
749 }
750
751 skip:
752 /*
753 * reading from either a bogus commit, or a reflog entry with
754 * %gn, %ge, etc.; 'sb' cannot be updated, but we still need
755 * to compute a valid return value.
756 */
757 if (part == 'n' || part == 'e' || part == 't' || part == 'd'
758 || part == 'D' || part == 'r' || part == 'i')
759 return placeholder_len;
760
761 return 0; /* unknown placeholder */
762 }
763
764 struct chunk {
765 size_t off;
766 size_t len;
767 };
768
769 enum flush_type {
770 no_flush,
771 flush_right,
772 flush_left,
773 flush_left_and_steal,
774 flush_both
775 };
776
777 enum trunc_type {
778 trunc_none,
779 trunc_left,
780 trunc_middle,
781 trunc_right
782 };
783
784 struct format_commit_context {
785 const struct commit *commit;
786 const struct pretty_print_context *pretty_ctx;
787 unsigned commit_header_parsed:1;
788 unsigned commit_message_parsed:1;
789 struct signature_check signature_check;
790 enum flush_type flush_type;
791 enum trunc_type truncate;
792 const char *message;
793 char *commit_encoding;
794 size_t width, indent1, indent2;
795 int auto_color;
796 int padding;
797
798 /* These offsets are relative to the start of the commit message. */
799 struct chunk author;
800 struct chunk committer;
801 size_t message_off;
802 size_t subject_off;
803 size_t body_off;
804
805 /* The following ones are relative to the result struct strbuf. */
806 size_t wrap_start;
807 };
808
809 static void parse_commit_header(struct format_commit_context *context)
810 {
811 const char *msg = context->message;
812 int i;
813
814 for (i = 0; msg[i]; i++) {
815 const char *name;
816 int eol;
817 for (eol = i; msg[eol] && msg[eol] != '\n'; eol++)
818 ; /* do nothing */
819
820 if (i == eol) {
821 break;
822 } else if (skip_prefix(msg + i, "author ", &name)) {
823 context->author.off = name - msg;
824 context->author.len = msg + eol - name;
825 } else if (skip_prefix(msg + i, "committer ", &name)) {
826 context->committer.off = name - msg;
827 context->committer.len = msg + eol - name;
828 }
829 i = eol;
830 }
831 context->message_off = i;
832 context->commit_header_parsed = 1;
833 }
834
835 static int istitlechar(char c)
836 {
837 return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') ||
838 (c >= '0' && c <= '9') || c == '.' || c == '_';
839 }
840
841 static void format_sanitized_subject(struct strbuf *sb, const char *msg)
842 {
843 size_t trimlen;
844 size_t start_len = sb->len;
845 int space = 2;
846
847 for (; *msg && *msg != '\n'; msg++) {
848 if (istitlechar(*msg)) {
849 if (space == 1)
850 strbuf_addch(sb, '-');
851 space = 0;
852 strbuf_addch(sb, *msg);
853 if (*msg == '.')
854 while (*(msg+1) == '.')
855 msg++;
856 } else
857 space |= 1;
858 }
859
860 /* trim any trailing '.' or '-' characters */
861 trimlen = 0;
862 while (sb->len - trimlen > start_len &&
863 (sb->buf[sb->len - 1 - trimlen] == '.'
864 || sb->buf[sb->len - 1 - trimlen] == '-'))
865 trimlen++;
866 strbuf_remove(sb, sb->len - trimlen, trimlen);
867 }
868
869 const char *format_subject(struct strbuf *sb, const char *msg,
870 const char *line_separator)
871 {
872 int first = 1;
873
874 for (;;) {
875 const char *line = msg;
876 int linelen = get_one_line(line);
877
878 msg += linelen;
879 if (!linelen || is_blank_line(line, &linelen))
880 break;
881
882 if (!sb)
883 continue;
884 strbuf_grow(sb, linelen + 2);
885 if (!first)
886 strbuf_addstr(sb, line_separator);
887 strbuf_add(sb, line, linelen);
888 first = 0;
889 }
890 return msg;
891 }
892
893 static void parse_commit_message(struct format_commit_context *c)
894 {
895 const char *msg = c->message + c->message_off;
896 const char *start = c->message;
897
898 msg = skip_blank_lines(msg);
899 c->subject_off = msg - start;
900
901 msg = format_subject(NULL, msg, NULL);
902 msg = skip_blank_lines(msg);
903 c->body_off = msg - start;
904
905 c->commit_message_parsed = 1;
906 }
907
908 static void strbuf_wrap(struct strbuf *sb, size_t pos,
909 size_t width, size_t indent1, size_t indent2)
910 {
911 struct strbuf tmp = STRBUF_INIT;
912
913 if (pos)
914 strbuf_add(&tmp, sb->buf, pos);
915 strbuf_add_wrapped_text(&tmp, sb->buf + pos,
916 (int) indent1, (int) indent2, (int) width);
917 strbuf_swap(&tmp, sb);
918 strbuf_release(&tmp);
919 }
920
921 static void rewrap_message_tail(struct strbuf *sb,
922 struct format_commit_context *c,
923 size_t new_width, size_t new_indent1,
924 size_t new_indent2)
925 {
926 if (c->width == new_width && c->indent1 == new_indent1 &&
927 c->indent2 == new_indent2)
928 return;
929 if (c->wrap_start < sb->len)
930 strbuf_wrap(sb, c->wrap_start, c->width, c->indent1, c->indent2);
931 c->wrap_start = sb->len;
932 c->width = new_width;
933 c->indent1 = new_indent1;
934 c->indent2 = new_indent2;
935 }
936
937 static int format_reflog_person(struct strbuf *sb,
938 char part,
939 struct reflog_walk_info *log,
940 const struct date_mode *dmode)
941 {
942 const char *ident;
943
944 if (!log)
945 return 2;
946
947 ident = get_reflog_ident(log);
948 if (!ident)
949 return 2;
950
951 return format_person_part(sb, part, ident, strlen(ident), dmode);
952 }
953
954 static size_t parse_color(struct strbuf *sb, /* in UTF-8 */
955 const char *placeholder,
956 struct format_commit_context *c)
957 {
958 const char *rest = placeholder;
959 const char *basic_color = NULL;
960
961 if (placeholder[1] == '(') {
962 const char *begin = placeholder + 2;
963 const char *end = strchr(begin, ')');
964 char color[COLOR_MAXLEN];
965
966 if (!end)
967 return 0;
968
969 if (skip_prefix(begin, "auto,", &begin)) {
970 if (!want_color(c->pretty_ctx->color))
971 return end - placeholder + 1;
972 } else if (skip_prefix(begin, "always,", &begin)) {
973 /* nothing to do; we do not respect want_color at all */
974 } else {
975 /* the default is the same as "auto" */
976 if (!want_color(c->pretty_ctx->color))
977 return end - placeholder + 1;
978 }
979
980 if (color_parse_mem(begin, end - begin, color) < 0)
981 die(_("unable to parse --pretty format"));
982 strbuf_addstr(sb, color);
983 return end - placeholder + 1;
984 }
985
986 /*
987 * We handle things like "%C(red)" above; for historical reasons, there
988 * are a few colors that can be specified without parentheses (and
989 * they cannot support things like "auto" or "always" at all).
990 */
991 if (skip_prefix(placeholder + 1, "red", &rest))
992 basic_color = GIT_COLOR_RED;
993 else if (skip_prefix(placeholder + 1, "green", &rest))
994 basic_color = GIT_COLOR_GREEN;
995 else if (skip_prefix(placeholder + 1, "blue", &rest))
996 basic_color = GIT_COLOR_BLUE;
997 else if (skip_prefix(placeholder + 1, "reset", &rest))
998 basic_color = GIT_COLOR_RESET;
999
1000 if (basic_color && want_color(c->pretty_ctx->color))
1001 strbuf_addstr(sb, basic_color);
1002
1003 return rest - placeholder;
1004 }
1005
1006 static size_t parse_padding_placeholder(const char *placeholder,
1007 struct format_commit_context *c)
1008 {
1009 const char *ch = placeholder;
1010 enum flush_type flush_type;
1011 int to_column = 0;
1012
1013 switch (*ch++) {
1014 case '<':
1015 flush_type = flush_right;
1016 break;
1017 case '>':
1018 if (*ch == '<') {
1019 flush_type = flush_both;
1020 ch++;
1021 } else if (*ch == '>') {
1022 flush_type = flush_left_and_steal;
1023 ch++;
1024 } else
1025 flush_type = flush_left;
1026 break;
1027 default:
1028 return 0;
1029 }
1030
1031 /* the next value means "wide enough to that column" */
1032 if (*ch == '|') {
1033 to_column = 1;
1034 ch++;
1035 }
1036
1037 if (*ch == '(') {
1038 const char *start = ch + 1;
1039 const char *end = start + strcspn(start, ",)");
1040 char *next;
1041 int width;
1042 if (!end || end == start)
1043 return 0;
1044 width = strtol(start, &next, 10);
1045 if (next == start || width == 0)
1046 return 0;
1047 if (width < 0) {
1048 if (to_column)
1049 width += term_columns();
1050 if (width < 0)
1051 return 0;
1052 }
1053 c->padding = to_column ? -width : width;
1054 c->flush_type = flush_type;
1055
1056 if (*end == ',') {
1057 start = end + 1;
1058 end = strchr(start, ')');
1059 if (!end || end == start)
1060 return 0;
1061 if (starts_with(start, "trunc)"))
1062 c->truncate = trunc_right;
1063 else if (starts_with(start, "ltrunc)"))
1064 c->truncate = trunc_left;
1065 else if (starts_with(start, "mtrunc)"))
1066 c->truncate = trunc_middle;
1067 else
1068 return 0;
1069 } else
1070 c->truncate = trunc_none;
1071
1072 return end - placeholder + 1;
1073 }
1074 return 0;
1075 }
1076
1077 static int match_placeholder_arg_value(const char *to_parse, const char *candidate,
1078 const char **end, const char **valuestart,
1079 size_t *valuelen)
1080 {
1081 const char *p;
1082
1083 if (!(skip_prefix(to_parse, candidate, &p)))
1084 return 0;
1085 if (valuestart) {
1086 if (*p == '=') {
1087 *valuestart = p + 1;
1088 *valuelen = strcspn(*valuestart, ",)");
1089 p = *valuestart + *valuelen;
1090 } else {
1091 if (*p != ',' && *p != ')')
1092 return 0;
1093 *valuestart = NULL;
1094 *valuelen = 0;
1095 }
1096 }
1097 if (*p == ',') {
1098 *end = p + 1;
1099 return 1;
1100 }
1101 if (*p == ')') {
1102 *end = p;
1103 return 1;
1104 }
1105 return 0;
1106 }
1107
1108 static int match_placeholder_bool_arg(const char *to_parse, const char *candidate,
1109 const char **end, int *val)
1110 {
1111 const char *argval;
1112 char *strval;
1113 size_t arglen;
1114 int v;
1115
1116 if (!match_placeholder_arg_value(to_parse, candidate, end, &argval, &arglen))
1117 return 0;
1118
1119 if (!argval) {
1120 *val = 1;
1121 return 1;
1122 }
1123
1124 strval = xstrndup(argval, arglen);
1125 v = git_parse_maybe_bool(strval);
1126 free(strval);
1127
1128 if (v == -1)
1129 return 0;
1130
1131 *val = v;
1132
1133 return 1;
1134 }
1135
1136 static int format_trailer_match_cb(const struct strbuf *key, void *ud)
1137 {
1138 const struct string_list *list = ud;
1139 const struct string_list_item *item;
1140
1141 for_each_string_list_item (item, list) {
1142 if (key->len == (uintptr_t)item->util &&
1143 !strncasecmp(item->string, key->buf, key->len))
1144 return 1;
1145 }
1146 return 0;
1147 }
1148
1149 static size_t format_commit_one(struct strbuf *sb, /* in UTF-8 */
1150 const char *placeholder,
1151 void *context)
1152 {
1153 struct format_commit_context *c = context;
1154 const struct commit *commit = c->commit;
1155 const char *msg = c->message;
1156 struct commit_list *p;
1157 const char *arg;
1158 size_t res;
1159 char **slot;
1160
1161 /* these are independent of the commit */
1162 res = strbuf_expand_literal_cb(sb, placeholder, NULL);
1163 if (res)
1164 return res;
1165
1166 switch (placeholder[0]) {
1167 case 'C':
1168 if (starts_with(placeholder + 1, "(auto)")) {
1169 c->auto_color = want_color(c->pretty_ctx->color);
1170 if (c->auto_color && sb->len)
1171 strbuf_addstr(sb, GIT_COLOR_RESET);
1172 return 7; /* consumed 7 bytes, "C(auto)" */
1173 } else {
1174 int ret = parse_color(sb, placeholder, c);
1175 if (ret)
1176 c->auto_color = 0;
1177 /*
1178 * Otherwise, we decided to treat %C<unknown>
1179 * as a literal string, and the previous
1180 * %C(auto) is still valid.
1181 */
1182 return ret;
1183 }
1184 case 'w':
1185 if (placeholder[1] == '(') {
1186 unsigned long width = 0, indent1 = 0, indent2 = 0;
1187 char *next;
1188 const char *start = placeholder + 2;
1189 const char *end = strchr(start, ')');
1190 if (!end)
1191 return 0;
1192 if (end > start) {
1193 width = strtoul(start, &next, 10);
1194 if (*next == ',') {
1195 indent1 = strtoul(next + 1, &next, 10);
1196 if (*next == ',') {
1197 indent2 = strtoul(next + 1,
1198 &next, 10);
1199 }
1200 }
1201 if (*next != ')')
1202 return 0;
1203 }
1204 rewrap_message_tail(sb, c, width, indent1, indent2);
1205 return end - placeholder + 1;
1206 } else
1207 return 0;
1208
1209 case '<':
1210 case '>':
1211 return parse_padding_placeholder(placeholder, c);
1212 }
1213
1214 /* these depend on the commit */
1215 if (!commit->object.parsed)
1216 parse_object(the_repository, &commit->object.oid);
1217
1218 switch (placeholder[0]) {
1219 case 'H': /* commit hash */
1220 strbuf_addstr(sb, diff_get_color(c->auto_color, DIFF_COMMIT));
1221 strbuf_addstr(sb, oid_to_hex(&commit->object.oid));
1222 strbuf_addstr(sb, diff_get_color(c->auto_color, DIFF_RESET));
1223 return 1;
1224 case 'h': /* abbreviated commit hash */
1225 strbuf_addstr(sb, diff_get_color(c->auto_color, DIFF_COMMIT));
1226 strbuf_add_unique_abbrev(sb, &commit->object.oid,
1227 c->pretty_ctx->abbrev);
1228 strbuf_addstr(sb, diff_get_color(c->auto_color, DIFF_RESET));
1229 return 1;
1230 case 'T': /* tree hash */
1231 strbuf_addstr(sb, oid_to_hex(get_commit_tree_oid(commit)));
1232 return 1;
1233 case 't': /* abbreviated tree hash */
1234 strbuf_add_unique_abbrev(sb,
1235 get_commit_tree_oid(commit),
1236 c->pretty_ctx->abbrev);
1237 return 1;
1238 case 'P': /* parent hashes */
1239 for (p = commit->parents; p; p = p->next) {
1240 if (p != commit->parents)
1241 strbuf_addch(sb, ' ');
1242 strbuf_addstr(sb, oid_to_hex(&p->item->object.oid));
1243 }
1244 return 1;
1245 case 'p': /* abbreviated parent hashes */
1246 for (p = commit->parents; p; p = p->next) {
1247 if (p != commit->parents)
1248 strbuf_addch(sb, ' ');
1249 strbuf_add_unique_abbrev(sb, &p->item->object.oid,
1250 c->pretty_ctx->abbrev);
1251 }
1252 return 1;
1253 case 'm': /* left/right/bottom */
1254 strbuf_addstr(sb, get_revision_mark(NULL, commit));
1255 return 1;
1256 case 'd':
1257 format_decorations(sb, commit, c->auto_color);
1258 return 1;
1259 case 'D':
1260 format_decorations_extended(sb, commit, c->auto_color, "", ", ", "");
1261 return 1;
1262 case 'S': /* tag/branch like --source */
1263 if (!(c->pretty_ctx->rev && c->pretty_ctx->rev->sources))
1264 return 0;
1265 slot = revision_sources_at(c->pretty_ctx->rev->sources, commit);
1266 if (!(slot && *slot))
1267 return 0;
1268 strbuf_addstr(sb, *slot);
1269 return 1;
1270 case 'g': /* reflog info */
1271 switch(placeholder[1]) {
1272 case 'd': /* reflog selector */
1273 case 'D':
1274 if (c->pretty_ctx->reflog_info)
1275 get_reflog_selector(sb,
1276 c->pretty_ctx->reflog_info,
1277 &c->pretty_ctx->date_mode,
1278 c->pretty_ctx->date_mode_explicit,
1279 (placeholder[1] == 'd'));
1280 return 2;
1281 case 's': /* reflog message */
1282 if (c->pretty_ctx->reflog_info)
1283 get_reflog_message(sb, c->pretty_ctx->reflog_info);
1284 return 2;
1285 case 'n':
1286 case 'N':
1287 case 'e':
1288 case 'E':
1289 return format_reflog_person(sb,
1290 placeholder[1],
1291 c->pretty_ctx->reflog_info,
1292 &c->pretty_ctx->date_mode);
1293 }
1294 return 0; /* unknown %g placeholder */
1295 case 'N':
1296 if (c->pretty_ctx->notes_message) {
1297 strbuf_addstr(sb, c->pretty_ctx->notes_message);
1298 return 1;
1299 }
1300 return 0;
1301 }
1302
1303 if (placeholder[0] == 'G') {
1304 if (!c->signature_check.result)
1305 check_commit_signature(c->commit, &(c->signature_check));
1306 switch (placeholder[1]) {
1307 case 'G':
1308 if (c->signature_check.gpg_output)
1309 strbuf_addstr(sb, c->signature_check.gpg_output);
1310 break;
1311 case '?':
1312 switch (c->signature_check.result) {
1313 case 'G':
1314 case 'B':
1315 case 'E':
1316 case 'U':
1317 case 'N':
1318 case 'X':
1319 case 'Y':
1320 case 'R':
1321 strbuf_addch(sb, c->signature_check.result);
1322 }
1323 break;
1324 case 'S':
1325 if (c->signature_check.signer)
1326 strbuf_addstr(sb, c->signature_check.signer);
1327 break;
1328 case 'K':
1329 if (c->signature_check.key)
1330 strbuf_addstr(sb, c->signature_check.key);
1331 break;
1332 case 'F':
1333 if (c->signature_check.fingerprint)
1334 strbuf_addstr(sb, c->signature_check.fingerprint);
1335 break;
1336 case 'P':
1337 if (c->signature_check.primary_key_fingerprint)
1338 strbuf_addstr(sb, c->signature_check.primary_key_fingerprint);
1339 break;
1340 default:
1341 return 0;
1342 }
1343 return 2;
1344 }
1345
1346
1347 /* For the rest we have to parse the commit header. */
1348 if (!c->commit_header_parsed)
1349 parse_commit_header(c);
1350
1351 switch (placeholder[0]) {
1352 case 'a': /* author ... */
1353 return format_person_part(sb, placeholder[1],
1354 msg + c->author.off, c->author.len,
1355 &c->pretty_ctx->date_mode);
1356 case 'c': /* committer ... */
1357 return format_person_part(sb, placeholder[1],
1358 msg + c->committer.off, c->committer.len,
1359 &c->pretty_ctx->date_mode);
1360 case 'e': /* encoding */
1361 if (c->commit_encoding)
1362 strbuf_addstr(sb, c->commit_encoding);
1363 return 1;
1364 case 'B': /* raw body */
1365 /* message_off is always left at the initial newline */
1366 strbuf_addstr(sb, msg + c->message_off + 1);
1367 return 1;
1368 }
1369
1370 /* Now we need to parse the commit message. */
1371 if (!c->commit_message_parsed)
1372 parse_commit_message(c);
1373
1374 switch (placeholder[0]) {
1375 case 's': /* subject */
1376 format_subject(sb, msg + c->subject_off, " ");
1377 return 1;
1378 case 'f': /* sanitized subject */
1379 format_sanitized_subject(sb, msg + c->subject_off);
1380 return 1;
1381 case 'b': /* body */
1382 strbuf_addstr(sb, msg + c->body_off);
1383 return 1;
1384 }
1385
1386 if (skip_prefix(placeholder, "(trailers", &arg)) {
1387 struct process_trailer_options opts = PROCESS_TRAILER_OPTIONS_INIT;
1388 struct string_list filter_list = STRING_LIST_INIT_NODUP;
1389 struct strbuf sepbuf = STRBUF_INIT;
1390 size_t ret = 0;
1391
1392 opts.no_divider = 1;
1393
1394 if (*arg == ':') {
1395 arg++;
1396 for (;;) {
1397 const char *argval;
1398 size_t arglen;
1399
1400 if (match_placeholder_arg_value(arg, "key", &arg, &argval, &arglen)) {
1401 uintptr_t len = arglen;
1402
1403 if (!argval)
1404 goto trailer_out;
1405
1406 if (len && argval[len - 1] == ':')
1407 len--;
1408 string_list_append(&filter_list, argval)->util = (char *)len;
1409
1410 opts.filter = format_trailer_match_cb;
1411 opts.filter_data = &filter_list;
1412 opts.only_trailers = 1;
1413 } else if (match_placeholder_arg_value(arg, "separator", &arg, &argval, &arglen)) {
1414 char *fmt;
1415
1416 strbuf_reset(&sepbuf);
1417 fmt = xstrndup(argval, arglen);
1418 strbuf_expand(&sepbuf, fmt, strbuf_expand_literal_cb, NULL);
1419 free(fmt);
1420 opts.separator = &sepbuf;
1421 } else if (!match_placeholder_bool_arg(arg, "only", &arg, &opts.only_trailers) &&
1422 !match_placeholder_bool_arg(arg, "unfold", &arg, &opts.unfold) &&
1423 !match_placeholder_bool_arg(arg, "valueonly", &arg, &opts.value_only))
1424 break;
1425 }
1426 }
1427 if (*arg == ')') {
1428 format_trailers_from_commit(sb, msg + c->subject_off, &opts);
1429 ret = arg - placeholder + 1;
1430 }
1431 trailer_out:
1432 string_list_clear(&filter_list, 0);
1433 strbuf_release(&sepbuf);
1434 return ret;
1435 }
1436
1437 return 0; /* unknown placeholder */
1438 }
1439
1440 static size_t format_and_pad_commit(struct strbuf *sb, /* in UTF-8 */
1441 const char *placeholder,
1442 struct format_commit_context *c)
1443 {
1444 struct strbuf local_sb = STRBUF_INIT;
1445 int total_consumed = 0, len, padding = c->padding;
1446 if (padding < 0) {
1447 const char *start = strrchr(sb->buf, '\n');
1448 int occupied;
1449 if (!start)
1450 start = sb->buf;
1451 occupied = utf8_strnwidth(start, -1, 1);
1452 occupied += c->pretty_ctx->graph_width;
1453 padding = (-padding) - occupied;
1454 }
1455 while (1) {
1456 int modifier = *placeholder == 'C';
1457 int consumed = format_commit_one(&local_sb, placeholder, c);
1458 total_consumed += consumed;
1459
1460 if (!modifier)
1461 break;
1462
1463 placeholder += consumed;
1464 if (*placeholder != '%')
1465 break;
1466 placeholder++;
1467 total_consumed++;
1468 }
1469 len = utf8_strnwidth(local_sb.buf, -1, 1);
1470
1471 if (c->flush_type == flush_left_and_steal) {
1472 const char *ch = sb->buf + sb->len - 1;
1473 while (len > padding && ch > sb->buf) {
1474 const char *p;
1475 if (*ch == ' ') {
1476 ch--;
1477 padding++;
1478 continue;
1479 }
1480 /* check for trailing ansi sequences */
1481 if (*ch != 'm')
1482 break;
1483 p = ch - 1;
1484 while (ch - p < 10 && *p != '\033')
1485 p--;
1486 if (*p != '\033' ||
1487 ch + 1 - p != display_mode_esc_sequence_len(p))
1488 break;
1489 /*
1490 * got a good ansi sequence, put it back to
1491 * local_sb as we're cutting sb
1492 */
1493 strbuf_insert(&local_sb, 0, p, ch + 1 - p);
1494 ch = p - 1;
1495 }
1496 strbuf_setlen(sb, ch + 1 - sb->buf);
1497 c->flush_type = flush_left;
1498 }
1499
1500 if (len > padding) {
1501 switch (c->truncate) {
1502 case trunc_left:
1503 strbuf_utf8_replace(&local_sb,
1504 0, len - (padding - 2),
1505 "..");
1506 break;
1507 case trunc_middle:
1508 strbuf_utf8_replace(&local_sb,
1509 padding / 2 - 1,
1510 len - (padding - 2),
1511 "..");
1512 break;
1513 case trunc_right:
1514 strbuf_utf8_replace(&local_sb,
1515 padding - 2, len - (padding - 2),
1516 "..");
1517 break;
1518 case trunc_none:
1519 break;
1520 }
1521 strbuf_addbuf(sb, &local_sb);
1522 } else {
1523 int sb_len = sb->len, offset = 0;
1524 if (c->flush_type == flush_left)
1525 offset = padding - len;
1526 else if (c->flush_type == flush_both)
1527 offset = (padding - len) / 2;
1528 /*
1529 * we calculate padding in columns, now
1530 * convert it back to chars
1531 */
1532 padding = padding - len + local_sb.len;
1533 strbuf_addchars(sb, ' ', padding);
1534 memcpy(sb->buf + sb_len + offset, local_sb.buf,
1535 local_sb.len);
1536 }
1537 strbuf_release(&local_sb);
1538 c->flush_type = no_flush;
1539 return total_consumed;
1540 }
1541
1542 static size_t format_commit_item(struct strbuf *sb, /* in UTF-8 */
1543 const char *placeholder,
1544 void *context)
1545 {
1546 int consumed;
1547 size_t orig_len;
1548 enum {
1549 NO_MAGIC,
1550 ADD_LF_BEFORE_NON_EMPTY,
1551 DEL_LF_BEFORE_EMPTY,
1552 ADD_SP_BEFORE_NON_EMPTY
1553 } magic = NO_MAGIC;
1554
1555 switch (placeholder[0]) {
1556 case '-':
1557 magic = DEL_LF_BEFORE_EMPTY;
1558 break;
1559 case '+':
1560 magic = ADD_LF_BEFORE_NON_EMPTY;
1561 break;
1562 case ' ':
1563 magic = ADD_SP_BEFORE_NON_EMPTY;
1564 break;
1565 default:
1566 break;
1567 }
1568 if (magic != NO_MAGIC)
1569 placeholder++;
1570
1571 orig_len = sb->len;
1572 if (((struct format_commit_context *)context)->flush_type != no_flush)
1573 consumed = format_and_pad_commit(sb, placeholder, context);
1574 else
1575 consumed = format_commit_one(sb, placeholder, context);
1576 if (magic == NO_MAGIC)
1577 return consumed;
1578
1579 if ((orig_len == sb->len) && magic == DEL_LF_BEFORE_EMPTY) {
1580 while (sb->len && sb->buf[sb->len - 1] == '\n')
1581 strbuf_setlen(sb, sb->len - 1);
1582 } else if (orig_len != sb->len) {
1583 if (magic == ADD_LF_BEFORE_NON_EMPTY)
1584 strbuf_insert(sb, orig_len, "\n", 1);
1585 else if (magic == ADD_SP_BEFORE_NON_EMPTY)
1586 strbuf_insert(sb, orig_len, " ", 1);
1587 }
1588 return consumed + 1;
1589 }
1590
1591 static size_t userformat_want_item(struct strbuf *sb, const char *placeholder,
1592 void *context)
1593 {
1594 struct userformat_want *w = context;
1595
1596 if (*placeholder == '+' || *placeholder == '-' || *placeholder == ' ')
1597 placeholder++;
1598
1599 switch (*placeholder) {
1600 case 'N':
1601 w->notes = 1;
1602 break;
1603 case 'S':
1604 w->source = 1;
1605 break;
1606 }
1607 return 0;
1608 }
1609
1610 void userformat_find_requirements(const char *fmt, struct userformat_want *w)
1611 {
1612 struct strbuf dummy = STRBUF_INIT;
1613
1614 if (!fmt) {
1615 if (!user_format)
1616 return;
1617 fmt = user_format;
1618 }
1619 strbuf_expand(&dummy, fmt, userformat_want_item, w);
1620 strbuf_release(&dummy);
1621 }
1622
1623 void repo_format_commit_message(struct repository *r,
1624 const struct commit *commit,
1625 const char *format, struct strbuf *sb,
1626 const struct pretty_print_context *pretty_ctx)
1627 {
1628 struct format_commit_context context = {
1629 .commit = commit,
1630 .pretty_ctx = pretty_ctx,
1631 .wrap_start = sb->len
1632 };
1633 const char *output_enc = pretty_ctx->output_encoding;
1634 const char *utf8 = "UTF-8";
1635
1636 /*
1637 * convert a commit message to UTF-8 first
1638 * as far as 'format_commit_item' assumes it in UTF-8
1639 */
1640 context.message = repo_logmsg_reencode(r, commit,
1641 &context.commit_encoding,
1642 utf8);
1643
1644 strbuf_expand(sb, format, format_commit_item, &context);
1645 rewrap_message_tail(sb, &context, 0, 0, 0);
1646
1647 /* then convert a commit message to an actual output encoding */
1648 if (output_enc) {
1649 if (same_encoding(utf8, output_enc))
1650 output_enc = NULL;
1651 } else {
1652 if (context.commit_encoding &&
1653 !same_encoding(context.commit_encoding, utf8))
1654 output_enc = context.commit_encoding;
1655 }
1656
1657 if (output_enc) {
1658 size_t outsz;
1659 char *out = reencode_string_len(sb->buf, sb->len,
1660 output_enc, utf8, &outsz);
1661 if (out)
1662 strbuf_attach(sb, out, outsz, outsz + 1);
1663 }
1664
1665 free(context.commit_encoding);
1666 repo_unuse_commit_buffer(r, commit, context.message);
1667 }
1668
1669 static void pp_header(struct pretty_print_context *pp,
1670 const char *encoding,
1671 const struct commit *commit,
1672 const char **msg_p,
1673 struct strbuf *sb)
1674 {
1675 int parents_shown = 0;
1676
1677 for (;;) {
1678 const char *name, *line = *msg_p;
1679 int linelen = get_one_line(*msg_p);
1680
1681 if (!linelen)
1682 return;
1683 *msg_p += linelen;
1684
1685 if (linelen == 1)
1686 /* End of header */
1687 return;
1688
1689 if (pp->fmt == CMIT_FMT_RAW) {
1690 strbuf_add(sb, line, linelen);
1691 continue;
1692 }
1693
1694 if (starts_with(line, "parent ")) {
1695 if (linelen != the_hash_algo->hexsz + 8)
1696 die("bad parent line in commit");
1697 continue;
1698 }
1699
1700 if (!parents_shown) {
1701 unsigned num = commit_list_count(commit->parents);
1702 /* with enough slop */
1703 strbuf_grow(sb, num * (GIT_MAX_HEXSZ + 10) + 20);
1704 add_merge_info(pp, sb, commit);
1705 parents_shown = 1;
1706 }
1707
1708 /*
1709 * MEDIUM == DEFAULT shows only author with dates.
1710 * FULL shows both authors but not dates.
1711 * FULLER shows both authors and dates.
1712 */
1713 if (skip_prefix(line, "author ", &name)) {
1714 strbuf_grow(sb, linelen + 80);
1715 pp_user_info(pp, "Author", sb, name, encoding);
1716 }
1717 if (skip_prefix(line, "committer ", &name) &&
1718 (pp->fmt == CMIT_FMT_FULL || pp->fmt == CMIT_FMT_FULLER)) {
1719 strbuf_grow(sb, linelen + 80);
1720 pp_user_info(pp, "Commit", sb, name, encoding);
1721 }
1722 }
1723 }
1724
1725 void pp_title_line(struct pretty_print_context *pp,
1726 const char **msg_p,
1727 struct strbuf *sb,
1728 const char *encoding,
1729 int need_8bit_cte)
1730 {
1731 static const int max_length = 78; /* per rfc2047 */
1732 struct strbuf title;
1733
1734 strbuf_init(&title, 80);
1735 *msg_p = format_subject(&title, *msg_p,
1736 pp->preserve_subject ? "\n" : " ");
1737
1738 strbuf_grow(sb, title.len + 1024);
1739 if (pp->print_email_subject) {
1740 if (pp->rev)
1741 fmt_output_email_subject(sb, pp->rev);
1742 if (needs_rfc2047_encoding(title.buf, title.len))
1743 add_rfc2047(sb, title.buf, title.len,
1744 encoding, RFC2047_SUBJECT);
1745 else
1746 strbuf_add_wrapped_bytes(sb, title.buf, title.len,
1747 -last_line_length(sb), 1, max_length);
1748 } else {
1749 strbuf_addbuf(sb, &title);
1750 }
1751 strbuf_addch(sb, '\n');
1752
1753 if (need_8bit_cte == 0) {
1754 int i;
1755 for (i = 0; i < pp->in_body_headers.nr; i++) {
1756 if (has_non_ascii(pp->in_body_headers.items[i].string)) {
1757 need_8bit_cte = 1;
1758 break;
1759 }
1760 }
1761 }
1762
1763 if (need_8bit_cte > 0) {
1764 const char *header_fmt =
1765 "MIME-Version: 1.0\n"
1766 "Content-Type: text/plain; charset=%s\n"
1767 "Content-Transfer-Encoding: 8bit\n";
1768 strbuf_addf(sb, header_fmt, encoding);
1769 }
1770 if (pp->after_subject) {
1771 strbuf_addstr(sb, pp->after_subject);
1772 }
1773 if (cmit_fmt_is_mail(pp->fmt)) {
1774 strbuf_addch(sb, '\n');
1775 }
1776
1777 if (pp->in_body_headers.nr) {
1778 int i;
1779 for (i = 0; i < pp->in_body_headers.nr; i++) {
1780 strbuf_addstr(sb, pp->in_body_headers.items[i].string);
1781 free(pp->in_body_headers.items[i].string);
1782 }
1783 string_list_clear(&pp->in_body_headers, 0);
1784 strbuf_addch(sb, '\n');
1785 }
1786
1787 strbuf_release(&title);
1788 }
1789
1790 static int pp_utf8_width(const char *start, const char *end)
1791 {
1792 int width = 0;
1793 size_t remain = end - start;
1794
1795 while (remain) {
1796 int n = utf8_width(&start, &remain);
1797 if (n < 0 || !start)
1798 return -1;
1799 width += n;
1800 }
1801 return width;
1802 }
1803
1804 static void strbuf_add_tabexpand(struct strbuf *sb, int tabwidth,
1805 const char *line, int linelen)
1806 {
1807 const char *tab;
1808
1809 while ((tab = memchr(line, '\t', linelen)) != NULL) {
1810 int width = pp_utf8_width(line, tab);
1811
1812 /*
1813 * If it wasn't well-formed utf8, or it
1814 * had characters with badly defined
1815 * width (control characters etc), just
1816 * give up on trying to align things.
1817 */
1818 if (width < 0)
1819 break;
1820
1821 /* Output the data .. */
1822 strbuf_add(sb, line, tab - line);
1823
1824 /* .. and the de-tabified tab */
1825 strbuf_addchars(sb, ' ', tabwidth - (width % tabwidth));
1826
1827 /* Skip over the printed part .. */
1828 linelen -= tab + 1 - line;
1829 line = tab + 1;
1830 }
1831
1832 /*
1833 * Print out everything after the last tab without
1834 * worrying about width - there's nothing more to
1835 * align.
1836 */
1837 strbuf_add(sb, line, linelen);
1838 }
1839
1840 /*
1841 * pp_handle_indent() prints out the intendation, and
1842 * the whole line (without the final newline), after
1843 * de-tabifying.
1844 */
1845 static void pp_handle_indent(struct pretty_print_context *pp,
1846 struct strbuf *sb, int indent,
1847 const char *line, int linelen)
1848 {
1849 strbuf_addchars(sb, ' ', indent);
1850 if (pp->expand_tabs_in_log)
1851 strbuf_add_tabexpand(sb, pp->expand_tabs_in_log, line, linelen);
1852 else
1853 strbuf_add(sb, line, linelen);
1854 }
1855
1856 static int is_mboxrd_from(const char *line, int len)
1857 {
1858 /*
1859 * a line matching /^From $/ here would only have len == 4
1860 * at this point because is_empty_line would've trimmed all
1861 * trailing space
1862 */
1863 return len > 4 && starts_with(line + strspn(line, ">"), "From ");
1864 }
1865
1866 void pp_remainder(struct pretty_print_context *pp,
1867 const char **msg_p,
1868 struct strbuf *sb,
1869 int indent)
1870 {
1871 int first = 1;
1872 for (;;) {
1873 const char *line = *msg_p;
1874 int linelen = get_one_line(line);
1875 *msg_p += linelen;
1876
1877 if (!linelen)
1878 break;
1879
1880 if (is_blank_line(line, &linelen)) {
1881 if (first)
1882 continue;
1883 if (pp->fmt == CMIT_FMT_SHORT)
1884 break;
1885 }
1886 first = 0;
1887
1888 strbuf_grow(sb, linelen + indent + 20);
1889 if (indent)
1890 pp_handle_indent(pp, sb, indent, line, linelen);
1891 else if (pp->expand_tabs_in_log)
1892 strbuf_add_tabexpand(sb, pp->expand_tabs_in_log,
1893 line, linelen);
1894 else {
1895 if (pp->fmt == CMIT_FMT_MBOXRD &&
1896 is_mboxrd_from(line, linelen))
1897 strbuf_addch(sb, '>');
1898
1899 strbuf_add(sb, line, linelen);
1900 }
1901 strbuf_addch(sb, '\n');
1902 }
1903 }
1904
1905 void pretty_print_commit(struct pretty_print_context *pp,
1906 const struct commit *commit,
1907 struct strbuf *sb)
1908 {
1909 unsigned long beginning_of_body;
1910 int indent = 4;
1911 const char *msg;
1912 const char *reencoded;
1913 const char *encoding;
1914 int need_8bit_cte = pp->need_8bit_cte;
1915
1916 if (pp->fmt == CMIT_FMT_USERFORMAT) {
1917 format_commit_message(commit, user_format, sb, pp);
1918 return;
1919 }
1920
1921 encoding = get_log_output_encoding();
1922 msg = reencoded = logmsg_reencode(commit, NULL, encoding);
1923
1924 if (pp->fmt == CMIT_FMT_ONELINE || cmit_fmt_is_mail(pp->fmt))
1925 indent = 0;
1926
1927 /*
1928 * We need to check and emit Content-type: to mark it
1929 * as 8-bit if we haven't done so.
1930 */
1931 if (cmit_fmt_is_mail(pp->fmt) && need_8bit_cte == 0) {
1932 int i, ch, in_body;
1933
1934 for (in_body = i = 0; (ch = msg[i]); i++) {
1935 if (!in_body) {
1936 /* author could be non 7-bit ASCII but
1937 * the log may be so; skip over the
1938 * header part first.
1939 */
1940 if (ch == '\n' && msg[i+1] == '\n')
1941 in_body = 1;
1942 }
1943 else if (non_ascii(ch)) {
1944 need_8bit_cte = 1;
1945 break;
1946 }
1947 }
1948 }
1949
1950 pp_header(pp, encoding, commit, &msg, sb);
1951 if (pp->fmt != CMIT_FMT_ONELINE && !pp->print_email_subject) {
1952 strbuf_addch(sb, '\n');
1953 }
1954
1955 /* Skip excess blank lines at the beginning of body, if any... */
1956 msg = skip_blank_lines(msg);
1957
1958 /* These formats treat the title line specially. */
1959 if (pp->fmt == CMIT_FMT_ONELINE || cmit_fmt_is_mail(pp->fmt))
1960 pp_title_line(pp, &msg, sb, encoding, need_8bit_cte);
1961
1962 beginning_of_body = sb->len;
1963 if (pp->fmt != CMIT_FMT_ONELINE)
1964 pp_remainder(pp, &msg, sb, indent);
1965 strbuf_rtrim(sb);
1966
1967 /* Make sure there is an EOLN for the non-oneline case */
1968 if (pp->fmt != CMIT_FMT_ONELINE)
1969 strbuf_addch(sb, '\n');
1970
1971 /*
1972 * The caller may append additional body text in e-mail
1973 * format. Make sure we did not strip the blank line
1974 * between the header and the body.
1975 */
1976 if (cmit_fmt_is_mail(pp->fmt) && sb->len <= beginning_of_body)
1977 strbuf_addch(sb, '\n');
1978
1979 unuse_commit_buffer(commit, reencoded);
1980 }
1981
1982 void pp_commit_easy(enum cmit_fmt fmt, const struct commit *commit,
1983 struct strbuf *sb)
1984 {
1985 struct pretty_print_context pp = {0};
1986 pp.fmt = fmt;
1987 pretty_print_commit(&pp, commit, sb);
1988 }
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