pretty.c

   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 has_rfc822_specials(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 void add_rfc822_quoted(struct strbuf *out, const char *s, int len)
 244 {
 245         int i;
 246
 247         /* just a guess, we may have to also backslash-quote */
 248         strbuf_grow(out, len + 2);
 249
 250         strbuf_addch(out, '"');
 251         for (i = 0; i < len; i++) {
 252                 switch (s[i]) {
 253                 case '"':
 254                 case '\\':
 255                         strbuf_addch(out, '\\');
 256                         /* fall through */
 257                 default:
 258                         strbuf_addch(out, s[i]);
 259                 }
 260         }
 261         strbuf_addch(out, '"');
 262 }
 263
 264 static int is_rfc2047_special(char ch)
 265 {
 266         return (non_ascii(ch) || (ch == '=') || (ch == '?') || (ch == '_'));
 267 }
 268
 269 static void add_rfc2047(struct strbuf *sb, const char *line, int len,
 270                        const char *encoding)
 271 {
 272         static const int max_length = 78; /* per rfc2822 */
 273         int i;
 274         int line_len;
 275
 276         /* How many bytes are already used on the current line? */
 277         for (i = sb->len - 1; i >= 0; i--)
 278                 if (sb->buf[i] == '\n')
 279                         break;
 280         line_len = sb->len - (i+1);
 281
 282         for (i = 0; i < len; i++) {
 283                 int ch = line[i];
 284                 if (non_ascii(ch) || ch == '\n')
 285                         goto needquote;
 286                 if ((i + 1 < len) && (ch == '=' && line[i+1] == '?'))
 287                         goto needquote;
 288         }
 289         strbuf_add_wrapped_bytes(sb, line, len, 0, 1, max_length - line_len);
 290         return;
 291
 292 needquote:
 293         strbuf_grow(sb, len * 3 + strlen(encoding) + 100);
 294         strbuf_addf(sb, "=?%s?q?", encoding);
 295         line_len += strlen(encoding) + 5; /* 5 for =??q? */
 296         for (i = 0; i < len; i++) {
 297                 unsigned ch = line[i] & 0xFF;
 298
 299                 if (line_len >= max_length - 2) {
 300                         strbuf_addf(sb, "?=\n =?%s?q?", encoding);
 301                         line_len = strlen(encoding) + 5 + 1; /* =??q? plus SP */
 302                 }
 303
 304                 /*
 305                  * We encode ' ' using '=20' even though rfc2047
 306                  * allows using '_' for readability.  Unfortunately,
 307                  * many programs do not understand this and just
 308                  * leave the underscore in place.
 309                  */
 310                 if (is_rfc2047_special(ch) || ch == ' ' || ch == '\n') {
 311                         strbuf_addf(sb, "=%02X", ch);
 312                         line_len += 3;
 313                 }
 314                 else {
 315                         strbuf_addch(sb, ch);
 316                         line_len++;
 317                 }
 318         }
 319         strbuf_addstr(sb, "?=");
 320 }
 321
 322 void pp_user_info(const struct pretty_print_context *pp,
 323                   const char *what, struct strbuf *sb,
 324                   const char *line, const char *encoding)
 325 {
 326         char *date;
 327         int namelen;
 328         unsigned long time;
 329         int tz;
 330
 331         if (pp->fmt == CMIT_FMT_ONELINE)
 332                 return;
 333         date = strchr(line, '>');
 334         if (!date)
 335                 return;
 336         namelen = ++date - line;
 337         time = strtoul(date, &date, 10);
 338         tz = strtol(date, NULL, 10);
 339
 340         if (pp->fmt == CMIT_FMT_EMAIL) {
 341                 char *name_tail = strchr(line, '<');
 342                 int display_name_length;
 343                 int final_line;
 344                 if (!name_tail)
 345                         return;
 346                 while (line < name_tail && isspace(name_tail[-1]))
 347                         name_tail--;
 348                 display_name_length = name_tail - line;
 349                 strbuf_addstr(sb, "From: ");
 350                 if (!has_rfc822_specials(line, display_name_length)) {
 351                         add_rfc2047(sb, line, display_name_length, encoding);
 352                 } else {
 353                         struct strbuf quoted = STRBUF_INIT;
 354                         add_rfc822_quoted(&quoted, line, display_name_length);
 355                         add_rfc2047(sb, quoted.buf, quoted.len, encoding);
 356                         strbuf_release(&quoted);
 357                 }
 358                 for (final_line = 0; final_line < sb->len; final_line++)
 359                         if (sb->buf[sb->len - final_line - 1] == '\n')
 360                                 break;
 361                 if (namelen - display_name_length + final_line > 78) {
 362                         strbuf_addch(sb, '\n');
 363                         if (!isspace(name_tail[0]))
 364                                 strbuf_addch(sb, ' ');
 365                 }
 366                 strbuf_add(sb, name_tail, namelen - display_name_length);
 367                 strbuf_addch(sb, '\n');
 368         } else {
 369                 strbuf_addf(sb, "%s: %.*s%.*s\n", what,
 370                               (pp->fmt == CMIT_FMT_FULLER) ? 4 : 0,
 371                               "    ", namelen, line);
 372         }
 373         switch (pp->fmt) {
 374         case CMIT_FMT_MEDIUM:
 375                 strbuf_addf(sb, "Date:   %s\n", show_date(time, tz, pp->date_mode));
 376                 break;
 377         case CMIT_FMT_EMAIL:
 378                 strbuf_addf(sb, "Date: %s\n", show_date(time, tz, DATE_RFC2822));
 379                 break;
 380         case CMIT_FMT_FULLER:
 381                 strbuf_addf(sb, "%sDate: %s\n", what, show_date(time, tz, pp->date_mode));
 382                 break;
 383         default:
 384                 /* notin' */
 385                 break;
 386         }
 387 }
 388
 389 static int is_empty_line(const char *line, int *len_p)
 390 {
 391         int len = *len_p;
 392         while (len && isspace(line[len-1]))
 393                 len--;
 394         *len_p = len;
 395         return !len;
 396 }
 397
 398 static const char *skip_empty_lines(const char *msg)
 399 {
 400         for (;;) {
 401                 int linelen = get_one_line(msg);
 402                 int ll = linelen;
 403                 if (!linelen)
 404                         break;
 405                 if (!is_empty_line(msg, &ll))
 406                         break;
 407                 msg += linelen;
 408         }
 409         return msg;
 410 }
 411
 412 static void add_merge_info(const struct pretty_print_context *pp,
 413                            struct strbuf *sb, const struct commit *commit)
 414 {
 415         struct commit_list *parent = commit->parents;
 416
 417         if ((pp->fmt == CMIT_FMT_ONELINE) || (pp->fmt == CMIT_FMT_EMAIL) ||
 418             !parent || !parent->next)
 419                 return;
 420
 421         strbuf_addstr(sb, "Merge:");
 422
 423         while (parent) {
 424                 struct commit *p = parent->item;
 425                 const char *hex = NULL;
 426                 if (pp->abbrev)
 427                         hex = find_unique_abbrev(p->object.sha1, pp->abbrev);
 428                 if (!hex)
 429                         hex = sha1_to_hex(p->object.sha1);
 430                 parent = parent->next;
 431
 432                 strbuf_addf(sb, " %s", hex);
 433         }
 434         strbuf_addch(sb, '\n');
 435 }
 436
 437 static char *get_header(const struct commit *commit, const char *key)
 438 {
 439         int key_len = strlen(key);
 440         const char *line = commit->buffer;
 441
 442         for (;;) {
 443                 const char *eol = strchr(line, '\n'), *next;
 444
 445                 if (line == eol)
 446                         return NULL;
 447                 if (!eol) {
 448                         eol = line + strlen(line);
 449                         next = NULL;
 450                 } else
 451                         next = eol + 1;
 452                 if (eol - line > key_len &&
 453                     !strncmp(line, key, key_len) &&
 454                     line[key_len] == ' ') {
 455                         return xmemdupz(line + key_len + 1, eol - line - key_len - 1);
 456                 }
 457                 line = next;
 458         }
 459 }
 460
 461 static char *replace_encoding_header(char *buf, const char *encoding)
 462 {
 463         struct strbuf tmp = STRBUF_INIT;
 464         size_t start, len;
 465         char *cp = buf;
 466
 467         /* guess if there is an encoding header before a \n\n */
 468         while (strncmp(cp, "encoding ", strlen("encoding "))) {
 469                 cp = strchr(cp, '\n');
 470                 if (!cp || *++cp == '\n')
 471                         return buf;
 472         }
 473         start = cp - buf;
 474         cp = strchr(cp, '\n');
 475         if (!cp)
 476                 return buf; /* should not happen but be defensive */
 477         len = cp + 1 - (buf + start);
 478
 479         strbuf_attach(&tmp, buf, strlen(buf), strlen(buf) + 1);
 480         if (is_encoding_utf8(encoding)) {
 481                 /* we have re-coded to UTF-8; drop the header */
 482                 strbuf_remove(&tmp, start, len);
 483         } else {
 484                 /* just replaces XXXX in 'encoding XXXX\n' */
 485                 strbuf_splice(&tmp, start + strlen("encoding "),
 486                                           len - strlen("encoding \n"),
 487                                           encoding, strlen(encoding));
 488         }
 489         return strbuf_detach(&tmp, NULL);
 490 }
 491
 492 char *logmsg_reencode(const struct commit *commit,
 493                       const char *output_encoding)
 494 {
 495         static const char *utf8 = "UTF-8";
 496         const char *use_encoding;
 497         char *encoding;
 498         char *out;
 499
 500         if (!*output_encoding)
 501                 return NULL;
 502         encoding = get_header(commit, "encoding");
 503         use_encoding = encoding ? encoding : utf8;
 504         if (!strcmp(use_encoding, output_encoding))
 505                 if (encoding) /* we'll strip encoding header later */
 506                         out = xstrdup(commit->buffer);
 507                 else
 508                         return NULL; /* nothing to do */
 509         else
 510                 out = reencode_string(commit->buffer,
 511                                       output_encoding, use_encoding);
 512         if (out)
 513                 out = replace_encoding_header(out, output_encoding);
 514
 515         free(encoding);
 516         return out;
 517 }
 518
 519 static int mailmap_name(char *email, int email_len, char *name, int name_len)
 520 {
 521         static struct string_list *mail_map;
 522         if (!mail_map) {
 523                 mail_map = xcalloc(1, sizeof(*mail_map));
 524                 read_mailmap(mail_map, NULL);
 525         }
 526         return mail_map->nr && map_user(mail_map, email, email_len, name, name_len);
 527 }
 528
 529 static size_t format_person_part(struct strbuf *sb, char part,
 530                                  const char *msg, int len, enum date_mode dmode)
 531 {
 532         /* currently all placeholders have same length */
 533         const int placeholder_len = 2;
 534         int start, end, tz = 0;
 535         unsigned long date = 0;
 536         char *ep;
 537         const char *name_start, *name_end, *mail_start, *mail_end, *msg_end = msg+len;
 538         char person_name[1024];
 539         char person_mail[1024];
 540
 541         /* advance 'end' to point to email start delimiter */
 542         for (end = 0; end < len && msg[end] != '<'; end++)
 543                 ; /* do nothing */
 544
 545         /*
 546          * When end points at the '<' that we found, it should have
 547          * matching '>' later, which means 'end' must be strictly
 548          * below len - 1.
 549          */
 550         if (end >= len - 2)
 551                 goto skip;
 552
 553         /* Seek for both name and email part */
 554         name_start = msg;
 555         name_end = msg+end;
 556         while (name_end > name_start && isspace(*(name_end-1)))
 557                 name_end--;
 558         mail_start = msg+end+1;
 559         mail_end = mail_start;
 560         while (mail_end < msg_end && *mail_end != '>')
 561                 mail_end++;
 562         if (mail_end == msg_end)
 563                 goto skip;
 564         end = mail_end-msg;
 565
 566         if (part == 'N' || part == 'E') { /* mailmap lookup */
 567                 strlcpy(person_name, name_start, name_end-name_start+1);
 568                 strlcpy(person_mail, mail_start, mail_end-mail_start+1);
 569                 mailmap_name(person_mail, sizeof(person_mail), person_name, sizeof(person_name));
 570                 name_start = person_name;
 571                 name_end = name_start + strlen(person_name);
 572                 mail_start = person_mail;
 573                 mail_end = mail_start +  strlen(person_mail);
 574         }
 575         if (part == 'n' || part == 'N') {       /* name */
 576                 strbuf_add(sb, name_start, name_end-name_start);
 577                 return placeholder_len;
 578         }
 579         if (part == 'e' || part == 'E') {       /* email */
 580                 strbuf_add(sb, mail_start, mail_end-mail_start);
 581                 return placeholder_len;
 582         }
 583
 584         /* advance 'start' to point to date start delimiter */
 585         for (start = end + 1; start < len && isspace(msg[start]); start++)
 586                 ; /* do nothing */
 587         if (start >= len)
 588                 goto skip;
 589         date = strtoul(msg + start, &ep, 10);
 590         if (msg + start == ep)
 591                 goto skip;
 592
 593         if (part == 't') {      /* date, UNIX timestamp */
 594                 strbuf_add(sb, msg + start, ep - (msg + start));
 595                 return placeholder_len;
 596         }
 597
 598         /* parse tz */
 599         for (start = ep - msg + 1; start < len && isspace(msg[start]); start++)
 600                 ; /* do nothing */
 601         if (start + 1 < len) {
 602                 tz = strtoul(msg + start + 1, NULL, 10);
 603                 if (msg[start] == '-')
 604                         tz = -tz;
 605         }
 606
 607         switch (part) {
 608         case 'd':       /* date */
 609                 strbuf_addstr(sb, show_date(date, tz, dmode));
 610                 return placeholder_len;
 611         case 'D':       /* date, RFC2822 style */
 612                 strbuf_addstr(sb, show_date(date, tz, DATE_RFC2822));
 613                 return placeholder_len;
 614         case 'r':       /* date, relative */
 615                 strbuf_addstr(sb, show_date(date, tz, DATE_RELATIVE));
 616                 return placeholder_len;
 617         case 'i':       /* date, ISO 8601 */
 618                 strbuf_addstr(sb, show_date(date, tz, DATE_ISO8601));
 619                 return placeholder_len;
 620         }
 621
 622 skip:
 623         /*
 624          * bogus commit, 'sb' cannot be updated, but we still need to
 625          * compute a valid return value.
 626          */
 627         if (part == 'n' || part == 'e' || part == 't' || part == 'd'
 628             || part == 'D' || part == 'r' || part == 'i')
 629                 return placeholder_len;
 630
 631         return 0; /* unknown placeholder */
 632 }
 633
 634 struct chunk {
 635         size_t off;
 636         size_t len;
 637 };
 638
 639 struct format_commit_context {
 640         const struct commit *commit;
 641         const struct pretty_print_context *pretty_ctx;
 642         unsigned commit_header_parsed:1;
 643         unsigned commit_message_parsed:1;
 644         unsigned commit_signature_parsed:1;
 645         struct {
 646                 char *gpg_output;
 647                 char good_bad;
 648                 char *signer;
 649         } signature;
 650         char *message;
 651         size_t width, indent1, indent2;
 652
 653         /* These offsets are relative to the start of the commit message. */
 654         struct chunk author;
 655         struct chunk committer;
 656         struct chunk encoding;
 657         size_t message_off;
 658         size_t subject_off;
 659         size_t body_off;
 660
 661         /* The following ones are relative to the result struct strbuf. */
 662         struct chunk abbrev_commit_hash;
 663         struct chunk abbrev_tree_hash;
 664         struct chunk abbrev_parent_hashes;
 665         size_t wrap_start;
 666 };
 667
 668 static int add_again(struct strbuf *sb, struct chunk *chunk)
 669 {
 670         if (chunk->len) {
 671                 strbuf_adddup(sb, chunk->off, chunk->len);
 672                 return 1;
 673         }
 674
 675         /*
 676          * We haven't seen this chunk before.  Our caller is surely
 677          * going to add it the hard way now.  Remember the most likely
 678          * start of the to-be-added chunk: the current end of the
 679          * struct strbuf.
 680          */
 681         chunk->off = sb->len;
 682         return 0;
 683 }
 684
 685 static void parse_commit_header(struct format_commit_context *context)
 686 {
 687         const char *msg = context->message;
 688         int i;
 689
 690         for (i = 0; msg[i]; i++) {
 691                 int eol;
 692                 for (eol = i; msg[eol] && msg[eol] != '\n'; eol++)
 693                         ; /* do nothing */
 694
 695                 if (i == eol) {
 696                         break;
 697                 } else if (!prefixcmp(msg + i, "author ")) {
 698                         context->author.off = i + 7;
 699                         context->author.len = eol - i - 7;
 700                 } else if (!prefixcmp(msg + i, "committer ")) {
 701                         context->committer.off = i + 10;
 702                         context->committer.len = eol - i - 10;
 703                 } else if (!prefixcmp(msg + i, "encoding ")) {
 704                         context->encoding.off = i + 9;
 705                         context->encoding.len = eol - i - 9;
 706                 }
 707                 i = eol;
 708         }
 709         context->message_off = i;
 710         context->commit_header_parsed = 1;
 711 }
 712
 713 static int istitlechar(char c)
 714 {
 715         return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') ||
 716                 (c >= '0' && c <= '9') || c == '.' || c == '_';
 717 }
 718
 719 static void format_sanitized_subject(struct strbuf *sb, const char *msg)
 720 {
 721         size_t trimlen;
 722         size_t start_len = sb->len;
 723         int space = 2;
 724
 725         for (; *msg && *msg != '\n'; msg++) {
 726                 if (istitlechar(*msg)) {
 727                         if (space == 1)
 728                                 strbuf_addch(sb, '-');
 729                         space = 0;
 730                         strbuf_addch(sb, *msg);
 731                         if (*msg == '.')
 732                                 while (*(msg+1) == '.')
 733                                         msg++;
 734                 } else
 735                         space |= 1;
 736         }
 737
 738         /* trim any trailing '.' or '-' characters */
 739         trimlen = 0;
 740         while (sb->len - trimlen > start_len &&
 741                 (sb->buf[sb->len - 1 - trimlen] == '.'
 742                 || sb->buf[sb->len - 1 - trimlen] == '-'))
 743                 trimlen++;
 744         strbuf_remove(sb, sb->len - trimlen, trimlen);
 745 }
 746
 747 const char *format_subject(struct strbuf *sb, const char *msg,
 748                            const char *line_separator)
 749 {
 750         int first = 1;
 751
 752         for (;;) {
 753                 const char *line = msg;
 754                 int linelen = get_one_line(line);
 755
 756                 msg += linelen;
 757                 if (!linelen || is_empty_line(line, &linelen))
 758                         break;
 759
 760                 if (!sb)
 761                         continue;
 762                 strbuf_grow(sb, linelen + 2);
 763                 if (!first)
 764                         strbuf_addstr(sb, line_separator);
 765                 strbuf_add(sb, line, linelen);
 766                 first = 0;
 767         }
 768         return msg;
 769 }
 770
 771 static void parse_commit_message(struct format_commit_context *c)
 772 {
 773         const char *msg = c->message + c->message_off;
 774         const char *start = c->message;
 775
 776         msg = skip_empty_lines(msg);
 777         c->subject_off = msg - start;
 778
 779         msg = format_subject(NULL, msg, NULL);
 780         msg = skip_empty_lines(msg);
 781         c->body_off = msg - start;
 782
 783         c->commit_message_parsed = 1;
 784 }
 785
 786 static void format_decoration(struct strbuf *sb, const struct commit *commit)
 787 {
 788         struct name_decoration *d;
 789         const char *prefix = " (";
 790
 791         load_ref_decorations(DECORATE_SHORT_REFS);
 792         d = lookup_decoration(&name_decoration, &commit->object);
 793         while (d) {
 794                 strbuf_addstr(sb, prefix);
 795                 prefix = ", ";
 796                 strbuf_addstr(sb, d->name);
 797                 d = d->next;
 798         }
 799         if (prefix[0] == ',')
 800                 strbuf_addch(sb, ')');
 801 }
 802
 803 static void strbuf_wrap(struct strbuf *sb, size_t pos,
 804                         size_t width, size_t indent1, size_t indent2)
 805 {
 806         struct strbuf tmp = STRBUF_INIT;
 807
 808         if (pos)
 809                 strbuf_add(&tmp, sb->buf, pos);
 810         strbuf_add_wrapped_text(&tmp, sb->buf + pos,
 811                                 (int) indent1, (int) indent2, (int) width);
 812         strbuf_swap(&tmp, sb);
 813         strbuf_release(&tmp);
 814 }
 815
 816 static void rewrap_message_tail(struct strbuf *sb,
 817                                 struct format_commit_context *c,
 818                                 size_t new_width, size_t new_indent1,
 819                                 size_t new_indent2)
 820 {
 821         if (c->width == new_width && c->indent1 == new_indent1 &&
 822             c->indent2 == new_indent2)
 823                 return;
 824         if (c->wrap_start < sb->len)
 825                 strbuf_wrap(sb, c->wrap_start, c->width, c->indent1, c->indent2);
 826         c->wrap_start = sb->len;
 827         c->width = new_width;
 828         c->indent1 = new_indent1;
 829         c->indent2 = new_indent2;
 830 }
 831
 832 static struct {
 833         char result;
 834         const char *check;
 835 } signature_check[] = {
 836         { 'G', ": Good signature from " },
 837         { 'B', ": BAD signature from " },
 838 };
 839
 840 static void parse_signature_lines(struct format_commit_context *ctx)
 841 {
 842         const char *buf = ctx->signature.gpg_output;
 843         int i;
 844
 845         for (i = 0; i < ARRAY_SIZE(signature_check); i++) {
 846                 const char *found = strstr(buf, signature_check[i].check);
 847                 const char *next;
 848                 if (!found)
 849                         continue;
 850                 ctx->signature.good_bad = signature_check[i].result;
 851                 found += strlen(signature_check[i].check);
 852                 next = strchrnul(found, '\n');
 853                 ctx->signature.signer = xmemdupz(found, next - found);
 854                 break;
 855         }
 856 }
 857
 858 static void parse_commit_signature(struct format_commit_context *ctx)
 859 {
 860         struct strbuf payload = STRBUF_INIT;
 861         struct strbuf signature = STRBUF_INIT;
 862         struct strbuf gpg_output = STRBUF_INIT;
 863         int status;
 864
 865         ctx->commit_signature_parsed = 1;
 866
 867         if (parse_signed_commit(ctx->commit->object.sha1,
 868                                 &payload, &signature) <= 0)
 869                 goto out;
 870         status = verify_signed_buffer(payload.buf, payload.len,
 871                                       signature.buf, signature.len,
 872                                       &gpg_output);
 873         if (status && !gpg_output.len)
 874                 goto out;
 875         ctx->signature.gpg_output = strbuf_detach(&gpg_output, NULL);
 876         parse_signature_lines(ctx);
 877
 878  out:
 879         strbuf_release(&gpg_output);
 880         strbuf_release(&payload);
 881         strbuf_release(&signature);
 882 }
 883
 884
 885 static int format_reflog_person(struct strbuf *sb,
 886                                 char part,
 887                                 struct reflog_walk_info *log,
 888                                 enum date_mode dmode)
 889 {
 890         const char *ident;
 891
 892         if (!log)
 893                 return 2;
 894
 895         ident = get_reflog_ident(log);
 896         if (!ident)
 897                 return 2;
 898
 899         return format_person_part(sb, part, ident, strlen(ident), dmode);
 900 }
 901
 902 static size_t format_commit_one(struct strbuf *sb, const char *placeholder,
 903                                 void *context)
 904 {
 905         struct format_commit_context *c = context;
 906         const struct commit *commit = c->commit;
 907         const char *msg = c->message;
 908         struct commit_list *p;
 909         int h1, h2;
 910
 911         /* these are independent of the commit */
 912         switch (placeholder[0]) {
 913         case 'C':
 914                 if (placeholder[1] == '(') {
 915                         const char *end = strchr(placeholder + 2, ')');
 916                         char color[COLOR_MAXLEN];
 917                         if (!end)
 918                                 return 0;
 919                         color_parse_mem(placeholder + 2,
 920                                         end - (placeholder + 2),
 921                                         "--pretty format", color);
 922                         strbuf_addstr(sb, color);
 923                         return end - placeholder + 1;
 924                 }
 925                 if (!prefixcmp(placeholder + 1, "red")) {
 926                         strbuf_addstr(sb, GIT_COLOR_RED);
 927                         return 4;
 928                 } else if (!prefixcmp(placeholder + 1, "green")) {
 929                         strbuf_addstr(sb, GIT_COLOR_GREEN);
 930                         return 6;
 931                 } else if (!prefixcmp(placeholder + 1, "blue")) {
 932                         strbuf_addstr(sb, GIT_COLOR_BLUE);
 933                         return 5;
 934                 } else if (!prefixcmp(placeholder + 1, "reset")) {
 935                         strbuf_addstr(sb, GIT_COLOR_RESET);
 936                         return 6;
 937                 } else
 938                         return 0;
 939         case 'n':               /* newline */
 940                 strbuf_addch(sb, '\n');
 941                 return 1;
 942         case 'x':
 943                 /* %x00 == NUL, %x0a == LF, etc. */
 944                 if (0 <= (h1 = hexval_table[0xff & placeholder[1]]) &&
 945                     h1 <= 16 &&
 946                     0 <= (h2 = hexval_table[0xff & placeholder[2]]) &&
 947                     h2 <= 16) {
 948                         strbuf_addch(sb, (h1<<4)|h2);
 949                         return 3;
 950                 } else
 951                         return 0;
 952         case 'w':
 953                 if (placeholder[1] == '(') {
 954                         unsigned long width = 0, indent1 = 0, indent2 = 0;
 955                         char *next;
 956                         const char *start = placeholder + 2;
 957                         const char *end = strchr(start, ')');
 958                         if (!end)
 959                                 return 0;
 960                         if (end > start) {
 961                                 width = strtoul(start, &next, 10);
 962                                 if (*next == ',') {
 963                                         indent1 = strtoul(next + 1, &next, 10);
 964                                         if (*next == ',') {
 965                                                 indent2 = strtoul(next + 1,
 966                                                                  &next, 10);
 967                                         }
 968                                 }
 969                                 if (*next != ')')
 970                                         return 0;
 971                         }
 972                         rewrap_message_tail(sb, c, width, indent1, indent2);
 973                         return end - placeholder + 1;
 974                 } else
 975                         return 0;
 976         }
 977
 978         /* these depend on the commit */
 979         if (!commit->object.parsed)
 980                 parse_object(commit->object.sha1);
 981
 982         switch (placeholder[0]) {
 983         case 'H':               /* commit hash */
 984                 strbuf_addstr(sb, sha1_to_hex(commit->object.sha1));
 985                 return 1;
 986         case 'h':               /* abbreviated commit hash */
 987                 if (add_again(sb, &c->abbrev_commit_hash))
 988                         return 1;
 989                 strbuf_addstr(sb, find_unique_abbrev(commit->object.sha1,
 990                                                      c->pretty_ctx->abbrev));
 991                 c->abbrev_commit_hash.len = sb->len - c->abbrev_commit_hash.off;
 992                 return 1;
 993         case 'T':               /* tree hash */
 994                 strbuf_addstr(sb, sha1_to_hex(commit->tree->object.sha1));
 995                 return 1;
 996         case 't':               /* abbreviated tree hash */
 997                 if (add_again(sb, &c->abbrev_tree_hash))
 998                         return 1;
 999                 strbuf_addstr(sb, find_unique_abbrev(commit->tree->object.sha1,
1000                                                      c->pretty_ctx->abbrev));
1001                 c->abbrev_tree_hash.len = sb->len - c->abbrev_tree_hash.off;
1002                 return 1;
1003         case 'P':               /* parent hashes */
1004                 for (p = commit->parents; p; p = p->next) {
1005                         if (p != commit->parents)
1006                                 strbuf_addch(sb, ' ');
1007                         strbuf_addstr(sb, sha1_to_hex(p->item->object.sha1));
1008                 }
1009                 return 1;
1010         case 'p':               /* abbreviated parent hashes */
1011                 if (add_again(sb, &c->abbrev_parent_hashes))
1012                         return 1;
1013                 for (p = commit->parents; p; p = p->next) {
1014                         if (p != commit->parents)
1015                                 strbuf_addch(sb, ' ');
1016                         strbuf_addstr(sb, find_unique_abbrev(
1017                                         p->item->object.sha1,
1018                                         c->pretty_ctx->abbrev));
1019                 }
1020                 c->abbrev_parent_hashes.len = sb->len -
1021                                               c->abbrev_parent_hashes.off;
1022                 return 1;
1023         case 'm':               /* left/right/bottom */
1024                 strbuf_addstr(sb, get_revision_mark(NULL, commit));
1025                 return 1;
1026         case 'd':
1027                 format_decoration(sb, commit);
1028                 return 1;
1029         case 'g':               /* reflog info */
1030                 switch(placeholder[1]) {
1031                 case 'd':       /* reflog selector */
1032                 case 'D':
1033                         if (c->pretty_ctx->reflog_info)
1034                                 get_reflog_selector(sb,
1035                                                     c->pretty_ctx->reflog_info,
1036                                                     c->pretty_ctx->date_mode,
1037                                                     (placeholder[1] == 'd'));
1038                         return 2;
1039                 case 's':       /* reflog message */
1040                         if (c->pretty_ctx->reflog_info)
1041                                 get_reflog_message(sb, c->pretty_ctx->reflog_info);
1042                         return 2;
1043                 case 'n':
1044                 case 'N':
1045                 case 'e':
1046                 case 'E':
1047                         return format_reflog_person(sb,
1048                                                     placeholder[1],
1049                                                     c->pretty_ctx->reflog_info,
1050                                                     c->pretty_ctx->date_mode);
1051                 }
1052                 return 0;       /* unknown %g placeholder */
1053         case 'N':
1054                 if (c->pretty_ctx->show_notes) {
1055                         format_display_notes(commit->object.sha1, sb,
1056                                     get_log_output_encoding(), 0);
1057                         return 1;
1058                 }
1059                 return 0;
1060         }
1061
1062         if (placeholder[0] == 'G') {
1063                 if (!c->commit_signature_parsed)
1064                         parse_commit_signature(c);
1065                 switch (placeholder[1]) {
1066                 case 'G':
1067                         if (c->signature.gpg_output)
1068                                 strbuf_addstr(sb, c->signature.gpg_output);
1069                         break;
1070                 case '?':
1071                         switch (c->signature.good_bad) {
1072                         case 'G':
1073                         case 'B':
1074                                 strbuf_addch(sb, c->signature.good_bad);
1075                         }
1076                         break;
1077                 case 'S':
1078                         if (c->signature.signer)
1079                                 strbuf_addstr(sb, c->signature.signer);
1080                         break;
1081                 }
1082                 return 2;
1083         }
1084
1085
1086         /* For the rest we have to parse the commit header. */
1087         if (!c->commit_header_parsed)
1088                 parse_commit_header(c);
1089
1090         switch (placeholder[0]) {
1091         case 'a':       /* author ... */
1092                 return format_person_part(sb, placeholder[1],
1093                                    msg + c->author.off, c->author.len,
1094                                    c->pretty_ctx->date_mode);
1095         case 'c':       /* committer ... */
1096                 return format_person_part(sb, placeholder[1],
1097                                    msg + c->committer.off, c->committer.len,
1098                                    c->pretty_ctx->date_mode);
1099         case 'e':       /* encoding */
1100                 strbuf_add(sb, msg + c->encoding.off, c->encoding.len);
1101                 return 1;
1102         case 'B':       /* raw body */
1103                 /* message_off is always left at the initial newline */
1104                 strbuf_addstr(sb, msg + c->message_off + 1);
1105                 return 1;
1106         }
1107
1108         /* Now we need to parse the commit message. */
1109         if (!c->commit_message_parsed)
1110                 parse_commit_message(c);
1111
1112         switch (placeholder[0]) {
1113         case 's':       /* subject */
1114                 format_subject(sb, msg + c->subject_off, " ");
1115                 return 1;
1116         case 'f':       /* sanitized subject */
1117                 format_sanitized_subject(sb, msg + c->subject_off);
1118                 return 1;
1119         case 'b':       /* body */
1120                 strbuf_addstr(sb, msg + c->body_off);
1121                 return 1;
1122         }
1123         return 0;       /* unknown placeholder */
1124 }
1125
1126 static size_t format_commit_item(struct strbuf *sb, const char *placeholder,
1127                                  void *context)
1128 {
1129         int consumed;
1130         size_t orig_len;
1131         enum {
1132                 NO_MAGIC,
1133                 ADD_LF_BEFORE_NON_EMPTY,
1134                 DEL_LF_BEFORE_EMPTY,
1135                 ADD_SP_BEFORE_NON_EMPTY
1136         } magic = NO_MAGIC;
1137
1138         switch (placeholder[0]) {
1139         case '-':
1140                 magic = DEL_LF_BEFORE_EMPTY;
1141                 break;
1142         case '+':
1143                 magic = ADD_LF_BEFORE_NON_EMPTY;
1144                 break;
1145         case ' ':
1146                 magic = ADD_SP_BEFORE_NON_EMPTY;
1147                 break;
1148         default:
1149                 break;
1150         }
1151         if (magic != NO_MAGIC)
1152                 placeholder++;
1153
1154         orig_len = sb->len;
1155         consumed = format_commit_one(sb, placeholder, context);
1156         if (magic == NO_MAGIC)
1157                 return consumed;
1158
1159         if ((orig_len == sb->len) && magic == DEL_LF_BEFORE_EMPTY) {
1160                 while (sb->len && sb->buf[sb->len - 1] == '\n')
1161                         strbuf_setlen(sb, sb->len - 1);
1162         } else if (orig_len != sb->len) {
1163                 if (magic == ADD_LF_BEFORE_NON_EMPTY)
1164                         strbuf_insert(sb, orig_len, "\n", 1);
1165                 else if (magic == ADD_SP_BEFORE_NON_EMPTY)
1166                         strbuf_insert(sb, orig_len, " ", 1);
1167         }
1168         return consumed + 1;
1169 }
1170
1171 static size_t userformat_want_item(struct strbuf *sb, const char *placeholder,
1172                                    void *context)
1173 {
1174         struct userformat_want *w = context;
1175
1176         if (*placeholder == '+' || *placeholder == '-' || *placeholder == ' ')
1177                 placeholder++;
1178
1179         switch (*placeholder) {
1180         case 'N':
1181                 w->notes = 1;
1182                 break;
1183         }
1184         return 0;
1185 }
1186
1187 void userformat_find_requirements(const char *fmt, struct userformat_want *w)
1188 {
1189         struct strbuf dummy = STRBUF_INIT;
1190
1191         if (!fmt) {
1192                 if (!user_format)
1193                         return;
1194                 fmt = user_format;
1195         }
1196         strbuf_expand(&dummy, fmt, userformat_want_item, w);
1197         strbuf_release(&dummy);
1198 }
1199
1200 void format_commit_message(const struct commit *commit,
1201                            const char *format, struct strbuf *sb,
1202                            const struct pretty_print_context *pretty_ctx)
1203 {
1204         struct format_commit_context context;
1205         static const char utf8[] = "UTF-8";
1206         const char *output_enc = pretty_ctx->output_encoding;
1207
1208         memset(&context, 0, sizeof(context));
1209         context.commit = commit;
1210         context.pretty_ctx = pretty_ctx;
1211         context.wrap_start = sb->len;
1212         context.message = commit->buffer;
1213         if (output_enc) {
1214                 char *enc = get_header(commit, "encoding");
1215                 if (strcmp(enc ? enc : utf8, output_enc)) {
1216                         context.message = logmsg_reencode(commit, output_enc);
1217                         if (!context.message)
1218                                 context.message = commit->buffer;
1219                 }
1220                 free(enc);
1221         }
1222
1223         strbuf_expand(sb, format, format_commit_item, &context);
1224         rewrap_message_tail(sb, &context, 0, 0, 0);
1225
1226         if (context.message != commit->buffer)
1227                 free(context.message);
1228         free(context.signature.gpg_output);
1229         free(context.signature.signer);
1230 }
1231
1232 static void pp_header(const struct pretty_print_context *pp,
1233                       const char *encoding,
1234                       const struct commit *commit,
1235                       const char **msg_p,
1236                       struct strbuf *sb)
1237 {
1238         int parents_shown = 0;
1239
1240         for (;;) {
1241                 const char *line = *msg_p;
1242                 int linelen = get_one_line(*msg_p);
1243
1244                 if (!linelen)
1245                         return;
1246                 *msg_p += linelen;
1247
1248                 if (linelen == 1)
1249                         /* End of header */
1250                         return;
1251
1252                 if (pp->fmt == CMIT_FMT_RAW) {
1253                         strbuf_add(sb, line, linelen);
1254                         continue;
1255                 }
1256
1257                 if (!memcmp(line, "parent ", 7)) {
1258                         if (linelen != 48)
1259                                 die("bad parent line in commit");
1260                         continue;
1261                 }
1262
1263                 if (!parents_shown) {
1264                         struct commit_list *parent;
1265                         int num;
1266                         for (parent = commit->parents, num = 0;
1267                              parent;
1268                              parent = parent->next, num++)
1269                                 ;
1270                         /* with enough slop */
1271                         strbuf_grow(sb, num * 50 + 20);
1272                         add_merge_info(pp, sb, commit);
1273                         parents_shown = 1;
1274                 }
1275
1276                 /*
1277                  * MEDIUM == DEFAULT shows only author with dates.
1278                  * FULL shows both authors but not dates.
1279                  * FULLER shows both authors and dates.
1280                  */
1281                 if (!memcmp(line, "author ", 7)) {
1282                         strbuf_grow(sb, linelen + 80);
1283                         pp_user_info(pp, "Author", sb, line + 7, encoding);
1284                 }
1285                 if (!memcmp(line, "committer ", 10) &&
1286                     (pp->fmt == CMIT_FMT_FULL || pp->fmt == CMIT_FMT_FULLER)) {
1287                         strbuf_grow(sb, linelen + 80);
1288                         pp_user_info(pp, "Commit", sb, line + 10, encoding);
1289                 }
1290         }
1291 }
1292
1293 void pp_title_line(const struct pretty_print_context *pp,
1294                    const char **msg_p,
1295                    struct strbuf *sb,
1296                    const char *encoding,
1297                    int need_8bit_cte)
1298 {
1299         struct strbuf title;
1300
1301         strbuf_init(&title, 80);
1302         *msg_p = format_subject(&title, *msg_p,
1303                                 pp->preserve_subject ? "\n" : " ");
1304
1305         strbuf_grow(sb, title.len + 1024);
1306         if (pp->subject) {
1307                 strbuf_addstr(sb, pp->subject);
1308                 add_rfc2047(sb, title.buf, title.len, encoding);
1309         } else {
1310                 strbuf_addbuf(sb, &title);
1311         }
1312         strbuf_addch(sb, '\n');
1313
1314         if (need_8bit_cte > 0) {
1315                 const char *header_fmt =
1316                         "MIME-Version: 1.0\n"
1317                         "Content-Type: text/plain; charset=%s\n"
1318                         "Content-Transfer-Encoding: 8bit\n";
1319                 strbuf_addf(sb, header_fmt, encoding);
1320         }
1321         if (pp->after_subject) {
1322                 strbuf_addstr(sb, pp->after_subject);
1323         }
1324         if (pp->fmt == CMIT_FMT_EMAIL) {
1325                 strbuf_addch(sb, '\n');
1326         }
1327         strbuf_release(&title);
1328 }
1329
1330 void pp_remainder(const struct pretty_print_context *pp,
1331                   const char **msg_p,
1332                   struct strbuf *sb,
1333                   int indent)
1334 {
1335         int first = 1;
1336         for (;;) {
1337                 const char *line = *msg_p;
1338                 int linelen = get_one_line(line);
1339                 *msg_p += linelen;
1340
1341                 if (!linelen)
1342                         break;
1343
1344                 if (is_empty_line(line, &linelen)) {
1345                         if (first)
1346                                 continue;
1347                         if (pp->fmt == CMIT_FMT_SHORT)
1348                                 break;
1349                 }
1350                 first = 0;
1351
1352                 strbuf_grow(sb, linelen + indent + 20);
1353                 if (indent) {
1354                         memset(sb->buf + sb->len, ' ', indent);
1355                         strbuf_setlen(sb, sb->len + indent);
1356                 }
1357                 strbuf_add(sb, line, linelen);
1358                 strbuf_addch(sb, '\n');
1359         }
1360 }
1361
1362 char *reencode_commit_message(const struct commit *commit, const char **encoding_p)
1363 {
1364         const char *encoding;
1365
1366         encoding = get_log_output_encoding();
1367         if (encoding_p)
1368                 *encoding_p = encoding;
1369         return logmsg_reencode(commit, encoding);
1370 }
1371
1372 void pretty_print_commit(const struct pretty_print_context *pp,
1373                          const struct commit *commit,
1374                          struct strbuf *sb)
1375 {
1376         unsigned long beginning_of_body;
1377         int indent = 4;
1378         const char *msg = commit->buffer;
1379         char *reencoded;
1380         const char *encoding;
1381         int need_8bit_cte = pp->need_8bit_cte;
1382
1383         if (pp->fmt == CMIT_FMT_USERFORMAT) {
1384                 format_commit_message(commit, user_format, sb, pp);
1385                 return;
1386         }
1387
1388         reencoded = reencode_commit_message(commit, &encoding);
1389         if (reencoded) {
1390                 msg = reencoded;
1391         }
1392
1393         if (pp->fmt == CMIT_FMT_ONELINE || pp->fmt == CMIT_FMT_EMAIL)
1394                 indent = 0;
1395
1396         /*
1397          * We need to check and emit Content-type: to mark it
1398          * as 8-bit if we haven't done so.
1399          */
1400         if (pp->fmt == CMIT_FMT_EMAIL && need_8bit_cte == 0) {
1401                 int i, ch, in_body;
1402
1403                 for (in_body = i = 0; (ch = msg[i]); i++) {
1404                         if (!in_body) {
1405                                 /* author could be non 7-bit ASCII but
1406                                  * the log may be so; skip over the
1407                                  * header part first.
1408                                  */
1409                                 if (ch == '\n' && msg[i+1] == '\n')
1410                                         in_body = 1;
1411                         }
1412                         else if (non_ascii(ch)) {
1413                                 need_8bit_cte = 1;
1414                                 break;
1415                         }
1416                 }
1417         }
1418
1419         pp_header(pp, encoding, commit, &msg, sb);
1420         if (pp->fmt != CMIT_FMT_ONELINE && !pp->subject) {
1421                 strbuf_addch(sb, '\n');
1422         }
1423
1424         /* Skip excess blank lines at the beginning of body, if any... */
1425         msg = skip_empty_lines(msg);
1426
1427         /* These formats treat the title line specially. */
1428         if (pp->fmt == CMIT_FMT_ONELINE || pp->fmt == CMIT_FMT_EMAIL)
1429                 pp_title_line(pp, &msg, sb, encoding, need_8bit_cte);
1430
1431         beginning_of_body = sb->len;
1432         if (pp->fmt != CMIT_FMT_ONELINE)
1433                 pp_remainder(pp, &msg, sb, indent);
1434         strbuf_rtrim(sb);
1435
1436         /* Make sure there is an EOLN for the non-oneline case */
1437         if (pp->fmt != CMIT_FMT_ONELINE)
1438                 strbuf_addch(sb, '\n');
1439
1440         /*
1441          * The caller may append additional body text in e-mail
1442          * format.  Make sure we did not strip the blank line
1443          * between the header and the body.
1444          */
1445         if (pp->fmt == CMIT_FMT_EMAIL && sb->len <= beginning_of_body)
1446                 strbuf_addch(sb, '\n');
1447
1448         if (pp->show_notes)
1449                 format_display_notes(commit->object.sha1, sb, encoding,
1450                                      NOTES_SHOW_HEADER | NOTES_INDENT);
1451
1452         free(reencoded);
1453 }
1454
1455 void pp_commit_easy(enum cmit_fmt fmt, const struct commit *commit,
1456                     struct strbuf *sb)
1457 {
1458         struct pretty_print_context pp = {0};
1459         pp.fmt = fmt;
1460         pretty_print_commit(&pp, commit, sb);
1461 }