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
  10 static char *user_format;
  11
  12 void get_commit_format(const char *arg, struct rev_info *rev)
  13 {
  14         int i;
  15         static struct cmt_fmt_map {
  16                 const char *n;
  17                 size_t cmp_len;
  18                 enum cmit_fmt v;
  19         } cmt_fmts[] = {
  20                 { "raw",        1,      CMIT_FMT_RAW },
  21                 { "medium",     1,      CMIT_FMT_MEDIUM },
  22                 { "short",      1,      CMIT_FMT_SHORT },
  23                 { "email",      1,      CMIT_FMT_EMAIL },
  24                 { "full",       5,      CMIT_FMT_FULL },
  25                 { "fuller",     5,      CMIT_FMT_FULLER },
  26                 { "oneline",    1,      CMIT_FMT_ONELINE },
  27         };
  28
  29         rev->use_terminator = 0;
  30         if (!arg || !*arg) {
  31                 rev->commit_format = CMIT_FMT_DEFAULT;
  32                 return;
  33         }
  34         if (!prefixcmp(arg, "format:") || !prefixcmp(arg, "tformat:")) {
  35                 const char *cp = strchr(arg, ':') + 1;
  36                 free(user_format);
  37                 user_format = xstrdup(cp);
  38                 if (arg[0] == 't')
  39                         rev->use_terminator = 1;
  40                 rev->commit_format = CMIT_FMT_USERFORMAT;
  41                 return;
  42         }
  43         for (i = 0; i < ARRAY_SIZE(cmt_fmts); i++) {
  44                 if (!strncmp(arg, cmt_fmts[i].n, cmt_fmts[i].cmp_len) &&
  45                     !strncmp(arg, cmt_fmts[i].n, strlen(arg))) {
  46                         if (cmt_fmts[i].v == CMIT_FMT_ONELINE)
  47                                 rev->use_terminator = 1;
  48                         rev->commit_format = cmt_fmts[i].v;
  49                         return;
  50                 }
  51         }
  52
  53         die("invalid --pretty format: %s", arg);
  54 }
  55
  56 /*
  57  * Generic support for pretty-printing the header
  58  */
  59 static int get_one_line(const char *msg)
  60 {
  61         int ret = 0;
  62
  63         for (;;) {
  64                 char c = *msg++;
  65                 if (!c)
  66                         break;
  67                 ret++;
  68                 if (c == '\n')
  69                         break;
  70         }
  71         return ret;
  72 }
  73
  74 /* High bit set, or ISO-2022-INT */
  75 int non_ascii(int ch)
  76 {
  77         ch = (ch & 0xff);
  78         return ((ch & 0x80) || (ch == 0x1b));
  79 }
  80
  81 static int is_rfc2047_special(char ch)
  82 {
  83         return (non_ascii(ch) || (ch == '=') || (ch == '?') || (ch == '_'));
  84 }
  85
  86 static void add_rfc2047(struct strbuf *sb, const char *line, int len,
  87                        const char *encoding)
  88 {
  89         int i, last;
  90
  91         for (i = 0; i < len; i++) {
  92                 int ch = line[i];
  93                 if (non_ascii(ch))
  94                         goto needquote;
  95                 if ((i + 1 < len) && (ch == '=' && line[i+1] == '?'))
  96                         goto needquote;
  97         }
  98         strbuf_add(sb, line, len);
  99         return;
 100
 101 needquote:
 102         strbuf_grow(sb, len * 3 + strlen(encoding) + 100);
 103         strbuf_addf(sb, "=?%s?q?", encoding);
 104         for (i = last = 0; i < len; i++) {
 105                 unsigned ch = line[i] & 0xFF;
 106                 /*
 107                  * We encode ' ' using '=20' even though rfc2047
 108                  * allows using '_' for readability.  Unfortunately,
 109                  * many programs do not understand this and just
 110                  * leave the underscore in place.
 111                  */
 112                 if (is_rfc2047_special(ch) || ch == ' ') {
 113                         strbuf_add(sb, line + last, i - last);
 114                         strbuf_addf(sb, "=%02X", ch);
 115                         last = i + 1;
 116                 }
 117         }
 118         strbuf_add(sb, line + last, len - last);
 119         strbuf_addstr(sb, "?=");
 120 }
 121
 122 void pp_user_info(const char *what, enum cmit_fmt fmt, struct strbuf *sb,
 123                   const char *line, enum date_mode dmode,
 124                   const char *encoding)
 125 {
 126         char *date;
 127         int namelen;
 128         unsigned long time;
 129         int tz;
 130         const char *filler = "    ";
 131
 132         if (fmt == CMIT_FMT_ONELINE)
 133                 return;
 134         date = strchr(line, '>');
 135         if (!date)
 136                 return;
 137         namelen = ++date - line;
 138         time = strtoul(date, &date, 10);
 139         tz = strtol(date, NULL, 10);
 140
 141         if (fmt == CMIT_FMT_EMAIL) {
 142                 char *name_tail = strchr(line, '<');
 143                 int display_name_length;
 144                 if (!name_tail)
 145                         return;
 146                 while (line < name_tail && isspace(name_tail[-1]))
 147                         name_tail--;
 148                 display_name_length = name_tail - line;
 149                 filler = "";
 150                 strbuf_addstr(sb, "From: ");
 151                 add_rfc2047(sb, line, display_name_length, encoding);
 152                 strbuf_add(sb, name_tail, namelen - display_name_length);
 153                 strbuf_addch(sb, '\n');
 154         } else {
 155                 strbuf_addf(sb, "%s: %.*s%.*s\n", what,
 156                               (fmt == CMIT_FMT_FULLER) ? 4 : 0,
 157                               filler, namelen, line);
 158         }
 159         switch (fmt) {
 160         case CMIT_FMT_MEDIUM:
 161                 strbuf_addf(sb, "Date:   %s\n", show_date(time, tz, dmode));
 162                 break;
 163         case CMIT_FMT_EMAIL:
 164                 strbuf_addf(sb, "Date: %s\n", show_date(time, tz, DATE_RFC2822));
 165                 break;
 166         case CMIT_FMT_FULLER:
 167                 strbuf_addf(sb, "%sDate: %s\n", what, show_date(time, tz, dmode));
 168                 break;
 169         default:
 170                 /* notin' */
 171                 break;
 172         }
 173 }
 174
 175 static int is_empty_line(const char *line, int *len_p)
 176 {
 177         int len = *len_p;
 178         while (len && isspace(line[len-1]))
 179                 len--;
 180         *len_p = len;
 181         return !len;
 182 }
 183
 184 static const char *skip_empty_lines(const char *msg)
 185 {
 186         for (;;) {
 187                 int linelen = get_one_line(msg);
 188                 int ll = linelen;
 189                 if (!linelen)
 190                         break;
 191                 if (!is_empty_line(msg, &ll))
 192                         break;
 193                 msg += linelen;
 194         }
 195         return msg;
 196 }
 197
 198 static void add_merge_info(enum cmit_fmt fmt, struct strbuf *sb,
 199                         const struct commit *commit, int abbrev)
 200 {
 201         struct commit_list *parent = commit->parents;
 202
 203         if ((fmt == CMIT_FMT_ONELINE) || (fmt == CMIT_FMT_EMAIL) ||
 204             !parent || !parent->next)
 205                 return;
 206
 207         strbuf_addstr(sb, "Merge:");
 208
 209         while (parent) {
 210                 struct commit *p = parent->item;
 211                 const char *hex = NULL;
 212                 const char *dots;
 213                 if (abbrev)
 214                         hex = find_unique_abbrev(p->object.sha1, abbrev);
 215                 if (!hex)
 216                         hex = sha1_to_hex(p->object.sha1);
 217                 dots = (abbrev && strlen(hex) != 40) ?  "..." : "";
 218                 parent = parent->next;
 219
 220                 strbuf_addf(sb, " %s%s", hex, dots);
 221         }
 222         strbuf_addch(sb, '\n');
 223 }
 224
 225 static char *get_header(const struct commit *commit, const char *key)
 226 {
 227         int key_len = strlen(key);
 228         const char *line = commit->buffer;
 229
 230         for (;;) {
 231                 const char *eol = strchr(line, '\n'), *next;
 232
 233                 if (line == eol)
 234                         return NULL;
 235                 if (!eol) {
 236                         eol = line + strlen(line);
 237                         next = NULL;
 238                 } else
 239                         next = eol + 1;
 240                 if (eol - line > key_len &&
 241                     !strncmp(line, key, key_len) &&
 242                     line[key_len] == ' ') {
 243                         return xmemdupz(line + key_len + 1, eol - line - key_len - 1);
 244                 }
 245                 line = next;
 246         }
 247 }
 248
 249 static char *replace_encoding_header(char *buf, const char *encoding)
 250 {
 251         struct strbuf tmp = STRBUF_INIT;
 252         size_t start, len;
 253         char *cp = buf;
 254
 255         /* guess if there is an encoding header before a \n\n */
 256         while (strncmp(cp, "encoding ", strlen("encoding "))) {
 257                 cp = strchr(cp, '\n');
 258                 if (!cp || *++cp == '\n')
 259                         return buf;
 260         }
 261         start = cp - buf;
 262         cp = strchr(cp, '\n');
 263         if (!cp)
 264                 return buf; /* should not happen but be defensive */
 265         len = cp + 1 - (buf + start);
 266
 267         strbuf_attach(&tmp, buf, strlen(buf), strlen(buf) + 1);
 268         if (is_encoding_utf8(encoding)) {
 269                 /* we have re-coded to UTF-8; drop the header */
 270                 strbuf_remove(&tmp, start, len);
 271         } else {
 272                 /* just replaces XXXX in 'encoding XXXX\n' */
 273                 strbuf_splice(&tmp, start + strlen("encoding "),
 274                                           len - strlen("encoding \n"),
 275                                           encoding, strlen(encoding));
 276         }
 277         return strbuf_detach(&tmp, NULL);
 278 }
 279
 280 static char *logmsg_reencode(const struct commit *commit,
 281                              const char *output_encoding)
 282 {
 283         static const char *utf8 = "utf-8";
 284         const char *use_encoding;
 285         char *encoding;
 286         char *out;
 287
 288         if (!*output_encoding)
 289                 return NULL;
 290         encoding = get_header(commit, "encoding");
 291         use_encoding = encoding ? encoding : utf8;
 292         if (!strcmp(use_encoding, output_encoding))
 293                 if (encoding) /* we'll strip encoding header later */
 294                         out = xstrdup(commit->buffer);
 295                 else
 296                         return NULL; /* nothing to do */
 297         else
 298                 out = reencode_string(commit->buffer,
 299                                       output_encoding, use_encoding);
 300         if (out)
 301                 out = replace_encoding_header(out, output_encoding);
 302
 303         free(encoding);
 304         return out;
 305 }
 306
 307 static int mailmap_name(struct strbuf *sb, const char *email)
 308 {
 309         static struct string_list *mail_map;
 310         char buffer[1024];
 311
 312         if (!mail_map) {
 313                 mail_map = xcalloc(1, sizeof(*mail_map));
 314                 read_mailmap(mail_map, ".mailmap", NULL);
 315         }
 316
 317         if (!mail_map->nr)
 318                 return -1;
 319
 320         if (!map_email(mail_map, email, buffer, sizeof(buffer)))
 321                 return -1;
 322         strbuf_addstr(sb, buffer);
 323         return 0;
 324 }
 325
 326 static size_t format_person_part(struct strbuf *sb, char part,
 327                                  const char *msg, int len, enum date_mode dmode)
 328 {
 329         /* currently all placeholders have same length */
 330         const int placeholder_len = 2;
 331         int start, end, tz = 0;
 332         unsigned long date = 0;
 333         char *ep;
 334
 335         /* advance 'end' to point to email start delimiter */
 336         for (end = 0; end < len && msg[end] != '<'; end++)
 337                 ; /* do nothing */
 338
 339         /*
 340          * When end points at the '<' that we found, it should have
 341          * matching '>' later, which means 'end' must be strictly
 342          * below len - 1.
 343          */
 344         if (end >= len - 2)
 345                 goto skip;
 346
 347         if (part == 'n' || part == 'N') {       /* name */
 348                 while (end > 0 && isspace(msg[end - 1]))
 349                         end--;
 350                 if (part != 'N' || !msg[end] || !msg[end + 1] ||
 351                     mailmap_name(sb, msg + end + 2) < 0)
 352                         strbuf_add(sb, msg, end);
 353                 return placeholder_len;
 354         }
 355         start = ++end; /* save email start position */
 356
 357         /* advance 'end' to point to email end delimiter */
 358         for ( ; end < len && msg[end] != '>'; end++)
 359                 ; /* do nothing */
 360
 361         if (end >= len)
 362                 goto skip;
 363
 364         if (part == 'e') {      /* email */
 365                 strbuf_add(sb, msg + start, end - start);
 366                 return placeholder_len;
 367         }
 368
 369         /* advance 'start' to point to date start delimiter */
 370         for (start = end + 1; start < len && isspace(msg[start]); start++)
 371                 ; /* do nothing */
 372         if (start >= len)
 373                 goto skip;
 374         date = strtoul(msg + start, &ep, 10);
 375         if (msg + start == ep)
 376                 goto skip;
 377
 378         if (part == 't') {      /* date, UNIX timestamp */
 379                 strbuf_add(sb, msg + start, ep - (msg + start));
 380                 return placeholder_len;
 381         }
 382
 383         /* parse tz */
 384         for (start = ep - msg + 1; start < len && isspace(msg[start]); start++)
 385                 ; /* do nothing */
 386         if (start + 1 < len) {
 387                 tz = strtoul(msg + start + 1, NULL, 10);
 388                 if (msg[start] == '-')
 389                         tz = -tz;
 390         }
 391
 392         switch (part) {
 393         case 'd':       /* date */
 394                 strbuf_addstr(sb, show_date(date, tz, dmode));
 395                 return placeholder_len;
 396         case 'D':       /* date, RFC2822 style */
 397                 strbuf_addstr(sb, show_date(date, tz, DATE_RFC2822));
 398                 return placeholder_len;
 399         case 'r':       /* date, relative */
 400                 strbuf_addstr(sb, show_date(date, tz, DATE_RELATIVE));
 401                 return placeholder_len;
 402         case 'i':       /* date, ISO 8601 */
 403                 strbuf_addstr(sb, show_date(date, tz, DATE_ISO8601));
 404                 return placeholder_len;
 405         }
 406
 407 skip:
 408         /*
 409          * bogus commit, 'sb' cannot be updated, but we still need to
 410          * compute a valid return value.
 411          */
 412         if (part == 'n' || part == 'e' || part == 't' || part == 'd'
 413             || part == 'D' || part == 'r' || part == 'i')
 414                 return placeholder_len;
 415
 416         return 0; /* unknown placeholder */
 417 }
 418
 419 struct chunk {
 420         size_t off;
 421         size_t len;
 422 };
 423
 424 struct format_commit_context {
 425         const struct commit *commit;
 426         enum date_mode dmode;
 427
 428         /* These offsets are relative to the start of the commit message. */
 429         int commit_header_parsed;
 430         struct chunk subject;
 431         struct chunk author;
 432         struct chunk committer;
 433         struct chunk encoding;
 434         size_t body_off;
 435
 436         /* The following ones are relative to the result struct strbuf. */
 437         struct chunk abbrev_commit_hash;
 438         struct chunk abbrev_tree_hash;
 439         struct chunk abbrev_parent_hashes;
 440 };
 441
 442 static int add_again(struct strbuf *sb, struct chunk *chunk)
 443 {
 444         if (chunk->len) {
 445                 strbuf_adddup(sb, chunk->off, chunk->len);
 446                 return 1;
 447         }
 448
 449         /*
 450          * We haven't seen this chunk before.  Our caller is surely
 451          * going to add it the hard way now.  Remember the most likely
 452          * start of the to-be-added chunk: the current end of the
 453          * struct strbuf.
 454          */
 455         chunk->off = sb->len;
 456         return 0;
 457 }
 458
 459 static void parse_commit_header(struct format_commit_context *context)
 460 {
 461         const char *msg = context->commit->buffer;
 462         int i;
 463         enum { HEADER, SUBJECT, BODY } state;
 464
 465         for (i = 0, state = HEADER; msg[i] && state < BODY; i++) {
 466                 int eol;
 467                 for (eol = i; msg[eol] && msg[eol] != '\n'; eol++)
 468                         ; /* do nothing */
 469
 470                 if (state == SUBJECT) {
 471                         context->subject.off = i;
 472                         context->subject.len = eol - i;
 473                         i = eol;
 474                 }
 475                 if (i == eol) {
 476                         state++;
 477                         /* strip empty lines */
 478                         while (msg[eol] == '\n' && msg[eol + 1] == '\n')
 479                                 eol++;
 480                 } else if (!prefixcmp(msg + i, "author ")) {
 481                         context->author.off = i + 7;
 482                         context->author.len = eol - i - 7;
 483                 } else if (!prefixcmp(msg + i, "committer ")) {
 484                         context->committer.off = i + 10;
 485                         context->committer.len = eol - i - 10;
 486                 } else if (!prefixcmp(msg + i, "encoding ")) {
 487                         context->encoding.off = i + 9;
 488                         context->encoding.len = eol - i - 9;
 489                 }
 490                 i = eol;
 491                 if (!msg[i])
 492                         break;
 493         }
 494         context->body_off = i;
 495         context->commit_header_parsed = 1;
 496 }
 497
 498 static void format_decoration(struct strbuf *sb, const struct commit *commit)
 499 {
 500         struct name_decoration *d;
 501         const char *prefix = " (";
 502
 503         load_ref_decorations();
 504         d = lookup_decoration(&name_decoration, &commit->object);
 505         while (d) {
 506                 strbuf_addstr(sb, prefix);
 507                 prefix = ", ";
 508                 strbuf_addstr(sb, d->name);
 509                 d = d->next;
 510         }
 511         if (prefix[0] == ',')
 512                 strbuf_addch(sb, ')');
 513 }
 514
 515 static size_t format_commit_item(struct strbuf *sb, const char *placeholder,
 516                                void *context)
 517 {
 518         struct format_commit_context *c = context;
 519         const struct commit *commit = c->commit;
 520         const char *msg = commit->buffer;
 521         struct commit_list *p;
 522         int h1, h2;
 523
 524         /* these are independent of the commit */
 525         switch (placeholder[0]) {
 526         case 'C':
 527                 if (!prefixcmp(placeholder + 1, "red")) {
 528                         strbuf_addstr(sb, "\033[31m");
 529                         return 4;
 530                 } else if (!prefixcmp(placeholder + 1, "green")) {
 531                         strbuf_addstr(sb, "\033[32m");
 532                         return 6;
 533                 } else if (!prefixcmp(placeholder + 1, "blue")) {
 534                         strbuf_addstr(sb, "\033[34m");
 535                         return 5;
 536                 } else if (!prefixcmp(placeholder + 1, "reset")) {
 537                         strbuf_addstr(sb, "\033[m");
 538                         return 6;
 539                 } else
 540                         return 0;
 541         case 'n':               /* newline */
 542                 strbuf_addch(sb, '\n');
 543                 return 1;
 544         case 'x':
 545                 /* %x00 == NUL, %x0a == LF, etc. */
 546                 if (0 <= (h1 = hexval_table[0xff & placeholder[1]]) &&
 547                     h1 <= 16 &&
 548                     0 <= (h2 = hexval_table[0xff & placeholder[2]]) &&
 549                     h2 <= 16) {
 550                         strbuf_addch(sb, (h1<<4)|h2);
 551                         return 3;
 552                 } else
 553                         return 0;
 554         }
 555
 556         /* these depend on the commit */
 557         if (!commit->object.parsed)
 558                 parse_object(commit->object.sha1);
 559
 560         switch (placeholder[0]) {
 561         case 'H':               /* commit hash */
 562                 strbuf_addstr(sb, sha1_to_hex(commit->object.sha1));
 563                 return 1;
 564         case 'h':               /* abbreviated commit hash */
 565                 if (add_again(sb, &c->abbrev_commit_hash))
 566                         return 1;
 567                 strbuf_addstr(sb, find_unique_abbrev(commit->object.sha1,
 568                                                      DEFAULT_ABBREV));
 569                 c->abbrev_commit_hash.len = sb->len - c->abbrev_commit_hash.off;
 570                 return 1;
 571         case 'T':               /* tree hash */
 572                 strbuf_addstr(sb, sha1_to_hex(commit->tree->object.sha1));
 573                 return 1;
 574         case 't':               /* abbreviated tree hash */
 575                 if (add_again(sb, &c->abbrev_tree_hash))
 576                         return 1;
 577                 strbuf_addstr(sb, find_unique_abbrev(commit->tree->object.sha1,
 578                                                      DEFAULT_ABBREV));
 579                 c->abbrev_tree_hash.len = sb->len - c->abbrev_tree_hash.off;
 580                 return 1;
 581         case 'P':               /* parent hashes */
 582                 for (p = commit->parents; p; p = p->next) {
 583                         if (p != commit->parents)
 584                                 strbuf_addch(sb, ' ');
 585                         strbuf_addstr(sb, sha1_to_hex(p->item->object.sha1));
 586                 }
 587                 return 1;
 588         case 'p':               /* abbreviated parent hashes */
 589                 if (add_again(sb, &c->abbrev_parent_hashes))
 590                         return 1;
 591                 for (p = commit->parents; p; p = p->next) {
 592                         if (p != commit->parents)
 593                                 strbuf_addch(sb, ' ');
 594                         strbuf_addstr(sb, find_unique_abbrev(
 595                                         p->item->object.sha1, DEFAULT_ABBREV));
 596                 }
 597                 c->abbrev_parent_hashes.len = sb->len -
 598                                               c->abbrev_parent_hashes.off;
 599                 return 1;
 600         case 'm':               /* left/right/bottom */
 601                 strbuf_addch(sb, (commit->object.flags & BOUNDARY)
 602                                  ? '-'
 603                                  : (commit->object.flags & SYMMETRIC_LEFT)
 604                                  ? '<'
 605                                  : '>');
 606                 return 1;
 607         case 'd':
 608                 format_decoration(sb, commit);
 609                 return 1;
 610         }
 611
 612         /* For the rest we have to parse the commit header. */
 613         if (!c->commit_header_parsed)
 614                 parse_commit_header(c);
 615
 616         switch (placeholder[0]) {
 617         case 's':       /* subject */
 618                 strbuf_add(sb, msg + c->subject.off, c->subject.len);
 619                 return 1;
 620         case 'a':       /* author ... */
 621                 return format_person_part(sb, placeholder[1],
 622                                    msg + c->author.off, c->author.len,
 623                                    c->dmode);
 624         case 'c':       /* committer ... */
 625                 return format_person_part(sb, placeholder[1],
 626                                    msg + c->committer.off, c->committer.len,
 627                                    c->dmode);
 628         case 'e':       /* encoding */
 629                 strbuf_add(sb, msg + c->encoding.off, c->encoding.len);
 630                 return 1;
 631         case 'b':       /* body */
 632                 strbuf_addstr(sb, msg + c->body_off);
 633                 return 1;
 634         }
 635         return 0;       /* unknown placeholder */
 636 }
 637
 638 void format_commit_message(const struct commit *commit,
 639                            const void *format, struct strbuf *sb,
 640                            enum date_mode dmode)
 641 {
 642         struct format_commit_context context;
 643
 644         memset(&context, 0, sizeof(context));
 645         context.commit = commit;
 646         context.dmode = dmode;
 647         strbuf_expand(sb, format, format_commit_item, &context);
 648 }
 649
 650 static void pp_header(enum cmit_fmt fmt,
 651                       int abbrev,
 652                       enum date_mode dmode,
 653                       const char *encoding,
 654                       const struct commit *commit,
 655                       const char **msg_p,
 656                       struct strbuf *sb)
 657 {
 658         int parents_shown = 0;
 659
 660         for (;;) {
 661                 const char *line = *msg_p;
 662                 int linelen = get_one_line(*msg_p);
 663
 664                 if (!linelen)
 665                         return;
 666                 *msg_p += linelen;
 667
 668                 if (linelen == 1)
 669                         /* End of header */
 670                         return;
 671
 672                 if (fmt == CMIT_FMT_RAW) {
 673                         strbuf_add(sb, line, linelen);
 674                         continue;
 675                 }
 676
 677                 if (!memcmp(line, "parent ", 7)) {
 678                         if (linelen != 48)
 679                                 die("bad parent line in commit");
 680                         continue;
 681                 }
 682
 683                 if (!parents_shown) {
 684                         struct commit_list *parent;
 685                         int num;
 686                         for (parent = commit->parents, num = 0;
 687                              parent;
 688                              parent = parent->next, num++)
 689                                 ;
 690                         /* with enough slop */
 691                         strbuf_grow(sb, num * 50 + 20);
 692                         add_merge_info(fmt, sb, commit, abbrev);
 693                         parents_shown = 1;
 694                 }
 695
 696                 /*
 697                  * MEDIUM == DEFAULT shows only author with dates.
 698                  * FULL shows both authors but not dates.
 699                  * FULLER shows both authors and dates.
 700                  */
 701                 if (!memcmp(line, "author ", 7)) {
 702                         strbuf_grow(sb, linelen + 80);
 703                         pp_user_info("Author", fmt, sb, line + 7, dmode, encoding);
 704                 }
 705                 if (!memcmp(line, "committer ", 10) &&
 706                     (fmt == CMIT_FMT_FULL || fmt == CMIT_FMT_FULLER)) {
 707                         strbuf_grow(sb, linelen + 80);
 708                         pp_user_info("Commit", fmt, sb, line + 10, dmode, encoding);
 709                 }
 710         }
 711 }
 712
 713 void pp_title_line(enum cmit_fmt fmt,
 714                    const char **msg_p,
 715                    struct strbuf *sb,
 716                    const char *subject,
 717                    const char *after_subject,
 718                    const char *encoding,
 719                    int need_8bit_cte)
 720 {
 721         struct strbuf title;
 722
 723         strbuf_init(&title, 80);
 724
 725         for (;;) {
 726                 const char *line = *msg_p;
 727                 int linelen = get_one_line(line);
 728
 729                 *msg_p += linelen;
 730                 if (!linelen || is_empty_line(line, &linelen))
 731                         break;
 732
 733                 strbuf_grow(&title, linelen + 2);
 734                 if (title.len) {
 735                         if (fmt == CMIT_FMT_EMAIL) {
 736                                 strbuf_addch(&title, '\n');
 737                         }
 738                         strbuf_addch(&title, ' ');
 739                 }
 740                 strbuf_add(&title, line, linelen);
 741         }
 742
 743         strbuf_grow(sb, title.len + 1024);
 744         if (subject) {
 745                 strbuf_addstr(sb, subject);
 746                 add_rfc2047(sb, title.buf, title.len, encoding);
 747         } else {
 748                 strbuf_addbuf(sb, &title);
 749         }
 750         strbuf_addch(sb, '\n');
 751
 752         if (need_8bit_cte > 0) {
 753                 const char *header_fmt =
 754                         "MIME-Version: 1.0\n"
 755                         "Content-Type: text/plain; charset=%s\n"
 756                         "Content-Transfer-Encoding: 8bit\n";
 757                 strbuf_addf(sb, header_fmt, encoding);
 758         }
 759         if (after_subject) {
 760                 strbuf_addstr(sb, after_subject);
 761         }
 762         if (fmt == CMIT_FMT_EMAIL) {
 763                 strbuf_addch(sb, '\n');
 764         }
 765         strbuf_release(&title);
 766 }
 767
 768 void pp_remainder(enum cmit_fmt fmt,
 769                   const char **msg_p,
 770                   struct strbuf *sb,
 771                   int indent)
 772 {
 773         int first = 1;
 774         for (;;) {
 775                 const char *line = *msg_p;
 776                 int linelen = get_one_line(line);
 777                 *msg_p += linelen;
 778
 779                 if (!linelen)
 780                         break;
 781
 782                 if (is_empty_line(line, &linelen)) {
 783                         if (first)
 784                                 continue;
 785                         if (fmt == CMIT_FMT_SHORT)
 786                                 break;
 787                 }
 788                 first = 0;
 789
 790                 strbuf_grow(sb, linelen + indent + 20);
 791                 if (indent) {
 792                         memset(sb->buf + sb->len, ' ', indent);
 793                         strbuf_setlen(sb, sb->len + indent);
 794                 }
 795                 strbuf_add(sb, line, linelen);
 796                 strbuf_addch(sb, '\n');
 797         }
 798 }
 799
 800 char *reencode_commit_message(const struct commit *commit, const char **encoding_p)
 801 {
 802         const char *encoding;
 803
 804         encoding = (git_log_output_encoding
 805                     ? git_log_output_encoding
 806                     : git_commit_encoding);
 807         if (!encoding)
 808                 encoding = "utf-8";
 809         if (encoding_p)
 810                 *encoding_p = encoding;
 811         return logmsg_reencode(commit, encoding);
 812 }
 813
 814 void pretty_print_commit(enum cmit_fmt fmt, const struct commit *commit,
 815                          struct strbuf *sb, int abbrev,
 816                          const char *subject, const char *after_subject,
 817                          enum date_mode dmode, int need_8bit_cte)
 818 {
 819         unsigned long beginning_of_body;
 820         int indent = 4;
 821         const char *msg = commit->buffer;
 822         char *reencoded;
 823         const char *encoding;
 824
 825         if (fmt == CMIT_FMT_USERFORMAT) {
 826                 format_commit_message(commit, user_format, sb, dmode);
 827                 return;
 828         }
 829
 830         reencoded = reencode_commit_message(commit, &encoding);
 831         if (reencoded) {
 832                 msg = reencoded;
 833         }
 834
 835         if (fmt == CMIT_FMT_ONELINE || fmt == CMIT_FMT_EMAIL)
 836                 indent = 0;
 837
 838         /*
 839          * We need to check and emit Content-type: to mark it
 840          * as 8-bit if we haven't done so.
 841          */
 842         if (fmt == CMIT_FMT_EMAIL && need_8bit_cte == 0) {
 843                 int i, ch, in_body;
 844
 845                 for (in_body = i = 0; (ch = msg[i]); i++) {
 846                         if (!in_body) {
 847                                 /* author could be non 7-bit ASCII but
 848                                  * the log may be so; skip over the
 849                                  * header part first.
 850                                  */
 851                                 if (ch == '\n' && msg[i+1] == '\n')
 852                                         in_body = 1;
 853                         }
 854                         else if (non_ascii(ch)) {
 855                                 need_8bit_cte = 1;
 856                                 break;
 857                         }
 858                 }
 859         }
 860
 861         pp_header(fmt, abbrev, dmode, encoding, commit, &msg, sb);
 862         if (fmt != CMIT_FMT_ONELINE && !subject) {
 863                 strbuf_addch(sb, '\n');
 864         }
 865
 866         /* Skip excess blank lines at the beginning of body, if any... */
 867         msg = skip_empty_lines(msg);
 868
 869         /* These formats treat the title line specially. */
 870         if (fmt == CMIT_FMT_ONELINE || fmt == CMIT_FMT_EMAIL)
 871                 pp_title_line(fmt, &msg, sb, subject,
 872                               after_subject, encoding, need_8bit_cte);
 873
 874         beginning_of_body = sb->len;
 875         if (fmt != CMIT_FMT_ONELINE)
 876                 pp_remainder(fmt, &msg, sb, indent);
 877         strbuf_rtrim(sb);
 878
 879         /* Make sure there is an EOLN for the non-oneline case */
 880         if (fmt != CMIT_FMT_ONELINE)
 881                 strbuf_addch(sb, '\n');
 882
 883         /*
 884          * The caller may append additional body text in e-mail
 885          * format.  Make sure we did not strip the blank line
 886          * between the header and the body.
 887          */
 888         if (fmt == CMIT_FMT_EMAIL && sb->len <= beginning_of_body)
 889                 strbuf_addch(sb, '\n');
 890         free(reencoded);
 891 }