pretty.c

   1 #include "cache.h"
   2 #include "commit.h"
   3 #include "utf8.h"
   4 #include "diff.h"
   5 #include "revision.h"
   6
   7 static struct cmt_fmt_map {
   8         const char *n;
   9         size_t cmp_len;
  10         enum cmit_fmt v;
  11 } cmt_fmts[] = {
  12         { "raw",        1,      CMIT_FMT_RAW },
  13         { "medium",     1,      CMIT_FMT_MEDIUM },
  14         { "short",      1,      CMIT_FMT_SHORT },
  15         { "email",      1,      CMIT_FMT_EMAIL },
  16         { "full",       5,      CMIT_FMT_FULL },
  17         { "fuller",     5,      CMIT_FMT_FULLER },
  18         { "oneline",    1,      CMIT_FMT_ONELINE },
  19         { "format:",    7,      CMIT_FMT_USERFORMAT},
  20 };
  21
  22 static char *user_format;
  23
  24 enum cmit_fmt get_commit_format(const char *arg)
  25 {
  26         int i;
  27
  28         if (!arg || !*arg)
  29                 return CMIT_FMT_DEFAULT;
  30         if (*arg == '=')
  31                 arg++;
  32         if (!prefixcmp(arg, "format:")) {
  33                 if (user_format)
  34                         free(user_format);
  35                 user_format = xstrdup(arg + 7);
  36                 return CMIT_FMT_USERFORMAT;
  37         }
  38         for (i = 0; i < ARRAY_SIZE(cmt_fmts); i++) {
  39                 if (!strncmp(arg, cmt_fmts[i].n, cmt_fmts[i].cmp_len) &&
  40                     !strncmp(arg, cmt_fmts[i].n, strlen(arg)))
  41                         return cmt_fmts[i].v;
  42         }
  43
  44         die("invalid --pretty format: %s", arg);
  45 }
  46
  47 /*
  48  * Generic support for pretty-printing the header
  49  */
  50 static int get_one_line(const char *msg)
  51 {
  52         int ret = 0;
  53
  54         for (;;) {
  55                 char c = *msg++;
  56                 if (!c)
  57                         break;
  58                 ret++;
  59                 if (c == '\n')
  60                         break;
  61         }
  62         return ret;
  63 }
  64
  65 /* High bit set, or ISO-2022-INT */
  66 int non_ascii(int ch)
  67 {
  68         ch = (ch & 0xff);
  69         return ((ch & 0x80) || (ch == 0x1b));
  70 }
  71
  72 static int is_rfc2047_special(char ch)
  73 {
  74         return (non_ascii(ch) || (ch == '=') || (ch == '?') || (ch == '_'));
  75 }
  76
  77 static void add_rfc2047(struct strbuf *sb, const char *line, int len,
  78                        const char *encoding)
  79 {
  80         int i, last;
  81
  82         for (i = 0; i < len; i++) {
  83                 int ch = line[i];
  84                 if (non_ascii(ch))
  85                         goto needquote;
  86                 if ((i + 1 < len) && (ch == '=' && line[i+1] == '?'))
  87                         goto needquote;
  88         }
  89         strbuf_add(sb, line, len);
  90         return;
  91
  92 needquote:
  93         strbuf_grow(sb, len * 3 + strlen(encoding) + 100);
  94         strbuf_addf(sb, "=?%s?q?", encoding);
  95         for (i = last = 0; i < len; i++) {
  96                 unsigned ch = line[i] & 0xFF;
  97                 /*
  98                  * We encode ' ' using '=20' even though rfc2047
  99                  * allows using '_' for readability.  Unfortunately,
 100                  * many programs do not understand this and just
 101                  * leave the underscore in place.
 102                  */
 103                 if (is_rfc2047_special(ch) || ch == ' ') {
 104                         strbuf_add(sb, line + last, i - last);
 105                         strbuf_addf(sb, "=%02X", ch);
 106                         last = i + 1;
 107                 }
 108         }
 109         strbuf_add(sb, line + last, len - last);
 110         strbuf_addstr(sb, "?=");
 111 }
 112
 113 static void add_user_info(const char *what, enum cmit_fmt fmt, struct strbuf *sb,
 114                          const char *line, enum date_mode dmode,
 115                          const char *encoding)
 116 {
 117         char *date;
 118         int namelen;
 119         unsigned long time;
 120         int tz;
 121         const char *filler = "    ";
 122
 123         if (fmt == CMIT_FMT_ONELINE)
 124                 return;
 125         date = strchr(line, '>');
 126         if (!date)
 127                 return;
 128         namelen = ++date - line;
 129         time = strtoul(date, &date, 10);
 130         tz = strtol(date, NULL, 10);
 131
 132         if (fmt == CMIT_FMT_EMAIL) {
 133                 char *name_tail = strchr(line, '<');
 134                 int display_name_length;
 135                 if (!name_tail)
 136                         return;
 137                 while (line < name_tail && isspace(name_tail[-1]))
 138                         name_tail--;
 139                 display_name_length = name_tail - line;
 140                 filler = "";
 141                 strbuf_addstr(sb, "From: ");
 142                 add_rfc2047(sb, line, display_name_length, encoding);
 143                 strbuf_add(sb, name_tail, namelen - display_name_length);
 144                 strbuf_addch(sb, '\n');
 145         } else {
 146                 strbuf_addf(sb, "%s: %.*s%.*s\n", what,
 147                               (fmt == CMIT_FMT_FULLER) ? 4 : 0,
 148                               filler, namelen, line);
 149         }
 150         switch (fmt) {
 151         case CMIT_FMT_MEDIUM:
 152                 strbuf_addf(sb, "Date:   %s\n", show_date(time, tz, dmode));
 153                 break;
 154         case CMIT_FMT_EMAIL:
 155                 strbuf_addf(sb, "Date: %s\n", show_date(time, tz, DATE_RFC2822));
 156                 break;
 157         case CMIT_FMT_FULLER:
 158                 strbuf_addf(sb, "%sDate: %s\n", what, show_date(time, tz, dmode));
 159                 break;
 160         default:
 161                 /* notin' */
 162                 break;
 163         }
 164 }
 165
 166 static int is_empty_line(const char *line, int *len_p)
 167 {
 168         int len = *len_p;
 169         while (len && isspace(line[len-1]))
 170                 len--;
 171         *len_p = len;
 172         return !len;
 173 }
 174
 175 static void add_merge_info(enum cmit_fmt fmt, struct strbuf *sb,
 176                         const struct commit *commit, int abbrev)
 177 {
 178         struct commit_list *parent = commit->parents;
 179
 180         if ((fmt == CMIT_FMT_ONELINE) || (fmt == CMIT_FMT_EMAIL) ||
 181             !parent || !parent->next)
 182                 return;
 183
 184         strbuf_addstr(sb, "Merge:");
 185
 186         while (parent) {
 187                 struct commit *p = parent->item;
 188                 const char *hex = NULL;
 189                 const char *dots;
 190                 if (abbrev)
 191                         hex = find_unique_abbrev(p->object.sha1, abbrev);
 192                 if (!hex)
 193                         hex = sha1_to_hex(p->object.sha1);
 194                 dots = (abbrev && strlen(hex) != 40) ?  "..." : "";
 195                 parent = parent->next;
 196
 197                 strbuf_addf(sb, " %s%s", hex, dots);
 198         }
 199         strbuf_addch(sb, '\n');
 200 }
 201
 202 static char *get_header(const struct commit *commit, const char *key)
 203 {
 204         int key_len = strlen(key);
 205         const char *line = commit->buffer;
 206
 207         for (;;) {
 208                 const char *eol = strchr(line, '\n'), *next;
 209
 210                 if (line == eol)
 211                         return NULL;
 212                 if (!eol) {
 213                         eol = line + strlen(line);
 214                         next = NULL;
 215                 } else
 216                         next = eol + 1;
 217                 if (eol - line > key_len &&
 218                     !strncmp(line, key, key_len) &&
 219                     line[key_len] == ' ') {
 220                         return xmemdupz(line + key_len + 1, eol - line - key_len - 1);
 221                 }
 222                 line = next;
 223         }
 224 }
 225
 226 static char *replace_encoding_header(char *buf, const char *encoding)
 227 {
 228         struct strbuf tmp;
 229         size_t start, len;
 230         char *cp = buf;
 231
 232         /* guess if there is an encoding header before a \n\n */
 233         while (strncmp(cp, "encoding ", strlen("encoding "))) {
 234                 cp = strchr(cp, '\n');
 235                 if (!cp || *++cp == '\n')
 236                         return buf;
 237         }
 238         start = cp - buf;
 239         cp = strchr(cp, '\n');
 240         if (!cp)
 241                 return buf; /* should not happen but be defensive */
 242         len = cp + 1 - (buf + start);
 243
 244         strbuf_init(&tmp, 0);
 245         strbuf_attach(&tmp, buf, strlen(buf), strlen(buf) + 1);
 246         if (is_encoding_utf8(encoding)) {
 247                 /* we have re-coded to UTF-8; drop the header */
 248                 strbuf_remove(&tmp, start, len);
 249         } else {
 250                 /* just replaces XXXX in 'encoding XXXX\n' */
 251                 strbuf_splice(&tmp, start + strlen("encoding "),
 252                                           len - strlen("encoding \n"),
 253                                           encoding, strlen(encoding));
 254         }
 255         return strbuf_detach(&tmp, NULL);
 256 }
 257
 258 static char *logmsg_reencode(const struct commit *commit,
 259                              const char *output_encoding)
 260 {
 261         static const char *utf8 = "utf-8";
 262         const char *use_encoding;
 263         char *encoding;
 264         char *out;
 265
 266         if (!*output_encoding)
 267                 return NULL;
 268         encoding = get_header(commit, "encoding");
 269         use_encoding = encoding ? encoding : utf8;
 270         if (!strcmp(use_encoding, output_encoding))
 271                 if (encoding) /* we'll strip encoding header later */
 272                         out = xstrdup(commit->buffer);
 273                 else
 274                         return NULL; /* nothing to do */
 275         else
 276                 out = reencode_string(commit->buffer,
 277                                       output_encoding, use_encoding);
 278         if (out)
 279                 out = replace_encoding_header(out, output_encoding);
 280
 281         free(encoding);
 282         return out;
 283 }
 284
 285 static size_t format_person_part(struct strbuf *sb, char part,
 286                                const char *msg, int len)
 287 {
 288         /* currently all placeholders have same length */
 289         const int placeholder_len = 2;
 290         int start, end, tz = 0;
 291         unsigned long date = 0;
 292         char *ep;
 293
 294         /* advance 'end' to point to email start delimiter */
 295         for (end = 0; end < len && msg[end] != '<'; end++)
 296                 ; /* do nothing */
 297
 298         /*
 299          * When end points at the '<' that we found, it should have
 300          * matching '>' later, which means 'end' must be strictly
 301          * below len - 1.
 302          */
 303         if (end >= len - 2)
 304                 goto skip;
 305
 306         if (part == 'n') {      /* name */
 307                 while (end > 0 && isspace(msg[end - 1]))
 308                         end--;
 309                 strbuf_add(sb, msg, end);
 310                 return placeholder_len;
 311         }
 312         start = ++end; /* save email start position */
 313
 314         /* advance 'end' to point to email end delimiter */
 315         for ( ; end < len && msg[end] != '>'; end++)
 316                 ; /* do nothing */
 317
 318         if (end >= len)
 319                 goto skip;
 320
 321         if (part == 'e') {      /* email */
 322                 strbuf_add(sb, msg + start, end - start);
 323                 return placeholder_len;
 324         }
 325
 326         /* advance 'start' to point to date start delimiter */
 327         for (start = end + 1; start < len && isspace(msg[start]); start++)
 328                 ; /* do nothing */
 329         if (start >= len)
 330                 goto skip;
 331         date = strtoul(msg + start, &ep, 10);
 332         if (msg + start == ep)
 333                 goto skip;
 334
 335         if (part == 't') {      /* date, UNIX timestamp */
 336                 strbuf_add(sb, msg + start, ep - (msg + start));
 337                 return placeholder_len;
 338         }
 339
 340         /* parse tz */
 341         for (start = ep - msg + 1; start < len && isspace(msg[start]); start++)
 342                 ; /* do nothing */
 343         if (start + 1 < len) {
 344                 tz = strtoul(msg + start + 1, NULL, 10);
 345                 if (msg[start] == '-')
 346                         tz = -tz;
 347         }
 348
 349         switch (part) {
 350         case 'd':       /* date */
 351                 strbuf_addstr(sb, show_date(date, tz, DATE_NORMAL));
 352                 return placeholder_len;
 353         case 'D':       /* date, RFC2822 style */
 354                 strbuf_addstr(sb, show_date(date, tz, DATE_RFC2822));
 355                 return placeholder_len;
 356         case 'r':       /* date, relative */
 357                 strbuf_addstr(sb, show_date(date, tz, DATE_RELATIVE));
 358                 return placeholder_len;
 359         case 'i':       /* date, ISO 8601 */
 360                 strbuf_addstr(sb, show_date(date, tz, DATE_ISO8601));
 361                 return placeholder_len;
 362         }
 363
 364 skip:
 365         /*
 366          * bogus commit, 'sb' cannot be updated, but we still need to
 367          * compute a valid return value.
 368          */
 369         if (part == 'n' || part == 'e' || part == 't' || part == 'd'
 370             || part == 'D' || part == 'r' || part == 'i')
 371                 return placeholder_len;
 372
 373         return 0; /* unknown placeholder */
 374 }
 375
 376 struct chunk {
 377         size_t off;
 378         size_t len;
 379 };
 380
 381 struct format_commit_context {
 382         const struct commit *commit;
 383
 384         /* These offsets are relative to the start of the commit message. */
 385         int commit_header_parsed;
 386         struct chunk subject;
 387         struct chunk author;
 388         struct chunk committer;
 389         struct chunk encoding;
 390         size_t body_off;
 391
 392         /* The following ones are relative to the result struct strbuf. */
 393         struct chunk abbrev_commit_hash;
 394         struct chunk abbrev_tree_hash;
 395         struct chunk abbrev_parent_hashes;
 396 };
 397
 398 static int add_again(struct strbuf *sb, struct chunk *chunk)
 399 {
 400         if (chunk->len) {
 401                 strbuf_adddup(sb, chunk->off, chunk->len);
 402                 return 1;
 403         }
 404
 405         /*
 406          * We haven't seen this chunk before.  Our caller is surely
 407          * going to add it the hard way now.  Remember the most likely
 408          * start of the to-be-added chunk: the current end of the
 409          * struct strbuf.
 410          */
 411         chunk->off = sb->len;
 412         return 0;
 413 }
 414
 415 static void parse_commit_header(struct format_commit_context *context)
 416 {
 417         const char *msg = context->commit->buffer;
 418         int i;
 419         enum { HEADER, SUBJECT, BODY } state;
 420
 421         for (i = 0, state = HEADER; msg[i] && state < BODY; i++) {
 422                 int eol;
 423                 for (eol = i; msg[eol] && msg[eol] != '\n'; eol++)
 424                         ; /* do nothing */
 425
 426                 if (state == SUBJECT) {
 427                         context->subject.off = i;
 428                         context->subject.len = eol - i;
 429                         i = eol;
 430                 }
 431                 if (i == eol) {
 432                         state++;
 433                         /* strip empty lines */
 434                         while (msg[eol] == '\n' && msg[eol + 1] == '\n')
 435                                 eol++;
 436                 } else if (!prefixcmp(msg + i, "author ")) {
 437                         context->author.off = i + 7;
 438                         context->author.len = eol - i - 7;
 439                 } else if (!prefixcmp(msg + i, "committer ")) {
 440                         context->committer.off = i + 10;
 441                         context->committer.len = eol - i - 10;
 442                 } else if (!prefixcmp(msg + i, "encoding ")) {
 443                         context->encoding.off = i + 9;
 444                         context->encoding.len = eol - i - 9;
 445                 }
 446                 i = eol;
 447                 if (!msg[i])
 448                         break;
 449         }
 450         context->body_off = i;
 451         context->commit_header_parsed = 1;
 452 }
 453
 454 static size_t format_commit_item(struct strbuf *sb, const char *placeholder,
 455                                void *context)
 456 {
 457         struct format_commit_context *c = context;
 458         const struct commit *commit = c->commit;
 459         const char *msg = commit->buffer;
 460         struct commit_list *p;
 461
 462         /* these are independent of the commit */
 463         switch (placeholder[0]) {
 464         case 'C':
 465                 if (!prefixcmp(placeholder + 1, "red")) {
 466                         strbuf_addstr(sb, "\033[31m");
 467                         return 4;
 468                 } else if (!prefixcmp(placeholder + 1, "green")) {
 469                         strbuf_addstr(sb, "\033[32m");
 470                         return 6;
 471                 } else if (!prefixcmp(placeholder + 1, "blue")) {
 472                         strbuf_addstr(sb, "\033[34m");
 473                         return 5;
 474                 } else if (!prefixcmp(placeholder + 1, "reset")) {
 475                         strbuf_addstr(sb, "\033[m");
 476                         return 6;
 477                 } else
 478                         return 0;
 479         case 'n':               /* newline */
 480                 strbuf_addch(sb, '\n');
 481                 return 1;
 482         }
 483
 484         /* these depend on the commit */
 485         if (!commit->object.parsed)
 486                 parse_object(commit->object.sha1);
 487
 488         switch (placeholder[0]) {
 489         case 'H':               /* commit hash */
 490                 strbuf_addstr(sb, sha1_to_hex(commit->object.sha1));
 491                 return 1;
 492         case 'h':               /* abbreviated commit hash */
 493                 if (add_again(sb, &c->abbrev_commit_hash))
 494                         return 1;
 495                 strbuf_addstr(sb, find_unique_abbrev(commit->object.sha1,
 496                                                      DEFAULT_ABBREV));
 497                 c->abbrev_commit_hash.len = sb->len - c->abbrev_commit_hash.off;
 498                 return 1;
 499         case 'T':               /* tree hash */
 500                 strbuf_addstr(sb, sha1_to_hex(commit->tree->object.sha1));
 501                 return 1;
 502         case 't':               /* abbreviated tree hash */
 503                 if (add_again(sb, &c->abbrev_tree_hash))
 504                         return 1;
 505                 strbuf_addstr(sb, find_unique_abbrev(commit->tree->object.sha1,
 506                                                      DEFAULT_ABBREV));
 507                 c->abbrev_tree_hash.len = sb->len - c->abbrev_tree_hash.off;
 508                 return 1;
 509         case 'P':               /* parent hashes */
 510                 for (p = commit->parents; p; p = p->next) {
 511                         if (p != commit->parents)
 512                                 strbuf_addch(sb, ' ');
 513                         strbuf_addstr(sb, sha1_to_hex(p->item->object.sha1));
 514                 }
 515                 return 1;
 516         case 'p':               /* abbreviated parent hashes */
 517                 if (add_again(sb, &c->abbrev_parent_hashes))
 518                         return 1;
 519                 for (p = commit->parents; p; p = p->next) {
 520                         if (p != commit->parents)
 521                                 strbuf_addch(sb, ' ');
 522                         strbuf_addstr(sb, find_unique_abbrev(
 523                                         p->item->object.sha1, DEFAULT_ABBREV));
 524                 }
 525                 c->abbrev_parent_hashes.len = sb->len -
 526                                               c->abbrev_parent_hashes.off;
 527                 return 1;
 528         case 'm':               /* left/right/bottom */
 529                 strbuf_addch(sb, (commit->object.flags & BOUNDARY)
 530                                  ? '-'
 531                                  : (commit->object.flags & SYMMETRIC_LEFT)
 532                                  ? '<'
 533                                  : '>');
 534                 return 1;
 535         }
 536
 537         /* For the rest we have to parse the commit header. */
 538         if (!c->commit_header_parsed)
 539                 parse_commit_header(c);
 540
 541         switch (placeholder[0]) {
 542         case 's':       /* subject */
 543                 strbuf_add(sb, msg + c->subject.off, c->subject.len);
 544                 return 1;
 545         case 'a':       /* author ... */
 546                 return format_person_part(sb, placeholder[1],
 547                                    msg + c->author.off, c->author.len);
 548         case 'c':       /* committer ... */
 549                 return format_person_part(sb, placeholder[1],
 550                                    msg + c->committer.off, c->committer.len);
 551         case 'e':       /* encoding */
 552                 strbuf_add(sb, msg + c->encoding.off, c->encoding.len);
 553                 return 1;
 554         case 'b':       /* body */
 555                 strbuf_addstr(sb, msg + c->body_off);
 556                 return 1;
 557         }
 558         return 0;       /* unknown placeholder */
 559 }
 560
 561 void format_commit_message(const struct commit *commit,
 562                            const void *format, struct strbuf *sb)
 563 {
 564         struct format_commit_context context;
 565
 566         memset(&context, 0, sizeof(context));
 567         context.commit = commit;
 568         strbuf_expand(sb, format, format_commit_item, &context);
 569 }
 570
 571 static void pp_header(enum cmit_fmt fmt,
 572                       int abbrev,
 573                       enum date_mode dmode,
 574                       const char *encoding,
 575                       const struct commit *commit,
 576                       const char **msg_p,
 577                       struct strbuf *sb)
 578 {
 579         int parents_shown = 0;
 580
 581         for (;;) {
 582                 const char *line = *msg_p;
 583                 int linelen = get_one_line(*msg_p);
 584
 585                 if (!linelen)
 586                         return;
 587                 *msg_p += linelen;
 588
 589                 if (linelen == 1)
 590                         /* End of header */
 591                         return;
 592
 593                 if (fmt == CMIT_FMT_RAW) {
 594                         strbuf_add(sb, line, linelen);
 595                         continue;
 596                 }
 597
 598                 if (!memcmp(line, "parent ", 7)) {
 599                         if (linelen != 48)
 600                                 die("bad parent line in commit");
 601                         continue;
 602                 }
 603
 604                 if (!parents_shown) {
 605                         struct commit_list *parent;
 606                         int num;
 607                         for (parent = commit->parents, num = 0;
 608                              parent;
 609                              parent = parent->next, num++)
 610                                 ;
 611                         /* with enough slop */
 612                         strbuf_grow(sb, num * 50 + 20);
 613                         add_merge_info(fmt, sb, commit, abbrev);
 614                         parents_shown = 1;
 615                 }
 616
 617                 /*
 618                  * MEDIUM == DEFAULT shows only author with dates.
 619                  * FULL shows both authors but not dates.
 620                  * FULLER shows both authors and dates.
 621                  */
 622                 if (!memcmp(line, "author ", 7)) {
 623                         strbuf_grow(sb, linelen + 80);
 624                         add_user_info("Author", fmt, sb, line + 7, dmode, encoding);
 625                 }
 626                 if (!memcmp(line, "committer ", 10) &&
 627                     (fmt == CMIT_FMT_FULL || fmt == CMIT_FMT_FULLER)) {
 628                         strbuf_grow(sb, linelen + 80);
 629                         add_user_info("Commit", fmt, sb, line + 10, dmode, encoding);
 630                 }
 631         }
 632 }
 633
 634 static void pp_title_line(enum cmit_fmt fmt,
 635                           const char **msg_p,
 636                           struct strbuf *sb,
 637                           const char *subject,
 638                           const char *after_subject,
 639                           const char *encoding,
 640                           int plain_non_ascii)
 641 {
 642         struct strbuf title;
 643
 644         strbuf_init(&title, 80);
 645
 646         for (;;) {
 647                 const char *line = *msg_p;
 648                 int linelen = get_one_line(line);
 649
 650                 *msg_p += linelen;
 651                 if (!linelen || is_empty_line(line, &linelen))
 652                         break;
 653
 654                 strbuf_grow(&title, linelen + 2);
 655                 if (title.len) {
 656                         if (fmt == CMIT_FMT_EMAIL) {
 657                                 strbuf_addch(&title, '\n');
 658                         }
 659                         strbuf_addch(&title, ' ');
 660                 }
 661                 strbuf_add(&title, line, linelen);
 662         }
 663
 664         strbuf_grow(sb, title.len + 1024);
 665         if (subject) {
 666                 strbuf_addstr(sb, subject);
 667                 add_rfc2047(sb, title.buf, title.len, encoding);
 668         } else {
 669                 strbuf_addbuf(sb, &title);
 670         }
 671         strbuf_addch(sb, '\n');
 672
 673         if (plain_non_ascii) {
 674                 const char *header_fmt =
 675                         "MIME-Version: 1.0\n"
 676                         "Content-Type: text/plain; charset=%s\n"
 677                         "Content-Transfer-Encoding: 8bit\n";
 678                 strbuf_addf(sb, header_fmt, encoding);
 679         }
 680         if (after_subject) {
 681                 strbuf_addstr(sb, after_subject);
 682         }
 683         if (fmt == CMIT_FMT_EMAIL) {
 684                 strbuf_addch(sb, '\n');
 685         }
 686         strbuf_release(&title);
 687 }
 688
 689 static void pp_remainder(enum cmit_fmt fmt,
 690                          const char **msg_p,
 691                          struct strbuf *sb,
 692                          int indent)
 693 {
 694         int first = 1;
 695         for (;;) {
 696                 const char *line = *msg_p;
 697                 int linelen = get_one_line(line);
 698                 *msg_p += linelen;
 699
 700                 if (!linelen)
 701                         break;
 702
 703                 if (is_empty_line(line, &linelen)) {
 704                         if (first)
 705                                 continue;
 706                         if (fmt == CMIT_FMT_SHORT)
 707                                 break;
 708                 }
 709                 first = 0;
 710
 711                 strbuf_grow(sb, linelen + indent + 20);
 712                 if (indent) {
 713                         memset(sb->buf + sb->len, ' ', indent);
 714                         strbuf_setlen(sb, sb->len + indent);
 715                 }
 716                 strbuf_add(sb, line, linelen);
 717                 strbuf_addch(sb, '\n');
 718         }
 719 }
 720
 721 void pretty_print_commit(enum cmit_fmt fmt, const struct commit *commit,
 722                                   struct strbuf *sb, int abbrev,
 723                                   const char *subject, const char *after_subject,
 724                                   enum date_mode dmode, int plain_non_ascii)
 725 {
 726         unsigned long beginning_of_body;
 727         int indent = 4;
 728         const char *msg = commit->buffer;
 729         char *reencoded;
 730         const char *encoding;
 731
 732         if (fmt == CMIT_FMT_USERFORMAT) {
 733                 format_commit_message(commit, user_format, sb);
 734                 return;
 735         }
 736
 737         encoding = (git_log_output_encoding
 738                     ? git_log_output_encoding
 739                     : git_commit_encoding);
 740         if (!encoding)
 741                 encoding = "utf-8";
 742         reencoded = logmsg_reencode(commit, encoding);
 743         if (reencoded) {
 744                 msg = reencoded;
 745         }
 746
 747         if (fmt == CMIT_FMT_ONELINE || fmt == CMIT_FMT_EMAIL)
 748                 indent = 0;
 749
 750         /* After-subject is used to pass in Content-Type: multipart
 751          * MIME header; in that case we do not have to do the
 752          * plaintext content type even if the commit message has
 753          * non 7-bit ASCII character.  Otherwise, check if we need
 754          * to say this is not a 7-bit ASCII.
 755          */
 756         if (fmt == CMIT_FMT_EMAIL && !after_subject) {
 757                 int i, ch, in_body;
 758
 759                 for (in_body = i = 0; (ch = msg[i]); i++) {
 760                         if (!in_body) {
 761                                 /* author could be non 7-bit ASCII but
 762                                  * the log may be so; skip over the
 763                                  * header part first.
 764                                  */
 765                                 if (ch == '\n' && msg[i+1] == '\n')
 766                                         in_body = 1;
 767                         }
 768                         else if (non_ascii(ch)) {
 769                                 plain_non_ascii = 1;
 770                                 break;
 771                         }
 772                 }
 773         }
 774
 775         pp_header(fmt, abbrev, dmode, encoding, commit, &msg, sb);
 776         if (fmt != CMIT_FMT_ONELINE && !subject) {
 777                 strbuf_addch(sb, '\n');
 778         }
 779
 780         /* Skip excess blank lines at the beginning of body, if any... */
 781         for (;;) {
 782                 int linelen = get_one_line(msg);
 783                 int ll = linelen;
 784                 if (!linelen)
 785                         break;
 786                 if (!is_empty_line(msg, &ll))
 787                         break;
 788                 msg += linelen;
 789         }
 790
 791         /* These formats treat the title line specially. */
 792         if (fmt == CMIT_FMT_ONELINE || fmt == CMIT_FMT_EMAIL)
 793                 pp_title_line(fmt, &msg, sb, subject,
 794                               after_subject, encoding, plain_non_ascii);
 795
 796         beginning_of_body = sb->len;
 797         if (fmt != CMIT_FMT_ONELINE)
 798                 pp_remainder(fmt, &msg, sb, indent);
 799         strbuf_rtrim(sb);
 800
 801         /* Make sure there is an EOLN for the non-oneline case */
 802         if (fmt != CMIT_FMT_ONELINE)
 803                 strbuf_addch(sb, '\n');
 804
 805         /*
 806          * The caller may append additional body text in e-mail
 807          * format.  Make sure we did not strip the blank line
 808          * between the header and the body.
 809          */
 810         if (fmt == CMIT_FMT_EMAIL && sb->len <= beginning_of_body)
 811                 strbuf_addch(sb, '\n');
 812         free(reencoded);
 813 }