Andrew's git / gitweb.git / pretty.c
?
pretty.con commit rev-list --children (72276a3)
   1#include "cache.h"
   2#include "commit.h"
   3#include "utf8.h"
   4#include "diff.h"
   5#include "revision.h"
   6
   7static 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
  22static char *user_format;
  23
  24enum 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                free(user_format);
  34                user_format = xstrdup(arg + 7);
  35                return CMIT_FMT_USERFORMAT;
  36        }
  37        for (i = 0; i < ARRAY_SIZE(cmt_fmts); i++) {
  38                if (!strncmp(arg, cmt_fmts[i].n, cmt_fmts[i].cmp_len) &&
  39                    !strncmp(arg, cmt_fmts[i].n, strlen(arg)))
  40                        return cmt_fmts[i].v;
  41        }
  42
  43        die("invalid --pretty format: %s", arg);
  44}
  45
  46/*
  47 * Generic support for pretty-printing the header
  48 */
  49static int get_one_line(const char *msg)
  50{
  51        int ret = 0;
  52
  53        for (;;) {
  54                char c = *msg++;
  55                if (!c)
  56                        break;
  57                ret++;
  58                if (c == '\n')
  59                        break;
  60        }
  61        return ret;
  62}
  63
  64/* High bit set, or ISO-2022-INT */
  65int non_ascii(int ch)
  66{
  67        ch = (ch & 0xff);
  68        return ((ch & 0x80) || (ch == 0x1b));
  69}
  70
  71static int is_rfc2047_special(char ch)
  72{
  73        return (non_ascii(ch) || (ch == '=') || (ch == '?') || (ch == '_'));
  74}
  75
  76static void add_rfc2047(struct strbuf *sb, const char *line, int len,
  77                       const char *encoding)
  78{
  79        int i, last;
  80
  81        for (i = 0; i < len; i++) {
  82                int ch = line[i];
  83                if (non_ascii(ch))
  84                        goto needquote;
  85                if ((i + 1 < len) && (ch == '=' && line[i+1] == '?'))
  86                        goto needquote;
  87        }
  88        strbuf_add(sb, line, len);
  89        return;
  90
  91needquote:
  92        strbuf_grow(sb, len * 3 + strlen(encoding) + 100);
  93        strbuf_addf(sb, "=?%s?q?", encoding);
  94        for (i = last = 0; i < len; i++) {
  95                unsigned ch = line[i] & 0xFF;
  96                /*
  97                 * We encode ' ' using '=20' even though rfc2047
  98                 * allows using '_' for readability.  Unfortunately,
  99                 * many programs do not understand this and just
 100                 * leave the underscore in place.
 101                 */
 102                if (is_rfc2047_special(ch) || ch == ' ') {
 103                        strbuf_add(sb, line + last, i - last);
 104                        strbuf_addf(sb, "=%02X", ch);
 105                        last = i + 1;
 106                }
 107        }
 108        strbuf_add(sb, line + last, len - last);
 109        strbuf_addstr(sb, "?=");
 110}
 111
 112void pp_user_info(const char *what, enum cmit_fmt fmt, struct strbuf *sb,
 113                  const char *line, enum date_mode dmode,
 114                  const char *encoding)
 115{
 116        char *date;
 117        int namelen;
 118        unsigned long time;
 119        int tz;
 120        const char *filler = "    ";
 121
 122        if (fmt == CMIT_FMT_ONELINE)
 123                return;
 124        date = strchr(line, '>');
 125        if (!date)
 126                return;
 127        namelen = ++date - line;
 128        time = strtoul(date, &date, 10);
 129        tz = strtol(date, NULL, 10);
 130
 131        if (fmt == CMIT_FMT_EMAIL) {
 132                char *name_tail = strchr(line, '<');
 133                int display_name_length;
 134                if (!name_tail)
 135                        return;
 136                while (line < name_tail && isspace(name_tail[-1]))
 137                        name_tail--;
 138                display_name_length = name_tail - line;
 139                filler = "";
 140                strbuf_addstr(sb, "From: ");
 141                add_rfc2047(sb, line, display_name_length, encoding);
 142                strbuf_add(sb, name_tail, namelen - display_name_length);
 143                strbuf_addch(sb, '\n');
 144        } else {
 145                strbuf_addf(sb, "%s: %.*s%.*s\n", what,
 146                              (fmt == CMIT_FMT_FULLER) ? 4 : 0,
 147                              filler, namelen, line);
 148        }
 149        switch (fmt) {
 150        case CMIT_FMT_MEDIUM:
 151                strbuf_addf(sb, "Date:   %s\n", show_date(time, tz, dmode));
 152                break;
 153        case CMIT_FMT_EMAIL:
 154                strbuf_addf(sb, "Date: %s\n", show_date(time, tz, DATE_RFC2822));
 155                break;
 156        case CMIT_FMT_FULLER:
 157                strbuf_addf(sb, "%sDate: %s\n", what, show_date(time, tz, dmode));
 158                break;
 159        default:
 160                /* notin' */
 161                break;
 162        }
 163}
 164
 165static int is_empty_line(const char *line, int *len_p)
 166{
 167        int len = *len_p;
 168        while (len && isspace(line[len-1]))
 169                len--;
 170        *len_p = len;
 171        return !len;
 172}
 173
 174static void add_merge_info(enum cmit_fmt fmt, struct strbuf *sb,
 175                        const struct commit *commit, int abbrev)
 176{
 177        struct commit_list *parent = commit->parents;
 178
 179        if ((fmt == CMIT_FMT_ONELINE) || (fmt == CMIT_FMT_EMAIL) ||
 180            !parent || !parent->next)
 181                return;
 182
 183        strbuf_addstr(sb, "Merge:");
 184
 185        while (parent) {
 186                struct commit *p = parent->item;
 187                const char *hex = NULL;
 188                const char *dots;
 189                if (abbrev)
 190                        hex = find_unique_abbrev(p->object.sha1, abbrev);
 191                if (!hex)
 192                        hex = sha1_to_hex(p->object.sha1);
 193                dots = (abbrev && strlen(hex) != 40) ?  "..." : "";
 194                parent = parent->next;
 195
 196                strbuf_addf(sb, " %s%s", hex, dots);
 197        }
 198        strbuf_addch(sb, '\n');
 199}
 200
 201static char *get_header(const struct commit *commit, const char *key)
 202{
 203        int key_len = strlen(key);
 204        const char *line = commit->buffer;
 205
 206        for (;;) {
 207                const char *eol = strchr(line, '\n'), *next;
 208
 209                if (line == eol)
 210                        return NULL;
 211                if (!eol) {
 212                        eol = line + strlen(line);
 213                        next = NULL;
 214                } else
 215                        next = eol + 1;
 216                if (eol - line > key_len &&
 217                    !strncmp(line, key, key_len) &&
 218                    line[key_len] == ' ') {
 219                        return xmemdupz(line + key_len + 1, eol - line - key_len - 1);
 220                }
 221                line = next;
 222        }
 223}
 224
 225static char *replace_encoding_header(char *buf, const char *encoding)
 226{
 227        struct strbuf tmp;
 228        size_t start, len;
 229        char *cp = buf;
 230
 231        /* guess if there is an encoding header before a \n\n */
 232        while (strncmp(cp, "encoding ", strlen("encoding "))) {
 233                cp = strchr(cp, '\n');
 234                if (!cp || *++cp == '\n')
 235                        return buf;
 236        }
 237        start = cp - buf;
 238        cp = strchr(cp, '\n');
 239        if (!cp)
 240                return buf; /* should not happen but be defensive */
 241        len = cp + 1 - (buf + start);
 242
 243        strbuf_init(&tmp, 0);
 244        strbuf_attach(&tmp, buf, strlen(buf), strlen(buf) + 1);
 245        if (is_encoding_utf8(encoding)) {
 246                /* we have re-coded to UTF-8; drop the header */
 247                strbuf_remove(&tmp, start, len);
 248        } else {
 249                /* just replaces XXXX in 'encoding XXXX\n' */
 250                strbuf_splice(&tmp, start + strlen("encoding "),
 251                                          len - strlen("encoding \n"),
 252                                          encoding, strlen(encoding));
 253        }
 254        return strbuf_detach(&tmp, NULL);
 255}
 256
 257static char *logmsg_reencode(const struct commit *commit,
 258                             const char *output_encoding)
 259{
 260        static const char *utf8 = "utf-8";
 261        const char *use_encoding;
 262        char *encoding;
 263        char *out;
 264
 265        if (!*output_encoding)
 266                return NULL;
 267        encoding = get_header(commit, "encoding");
 268        use_encoding = encoding ? encoding : utf8;
 269        if (!strcmp(use_encoding, output_encoding))
 270                if (encoding) /* we'll strip encoding header later */
 271                        out = xstrdup(commit->buffer);
 272                else
 273                        return NULL; /* nothing to do */
 274        else
 275                out = reencode_string(commit->buffer,
 276                                      output_encoding, use_encoding);
 277        if (out)
 278                out = replace_encoding_header(out, output_encoding);
 279
 280        free(encoding);
 281        return out;
 282}
 283
 284static size_t format_person_part(struct strbuf *sb, char part,
 285                               const char *msg, int len)
 286{
 287        /* currently all placeholders have same length */
 288        const int placeholder_len = 2;
 289        int start, end, tz = 0;
 290        unsigned long date = 0;
 291        char *ep;
 292
 293        /* advance 'end' to point to email start delimiter */
 294        for (end = 0; end < len && msg[end] != '<'; end++)
 295                ; /* do nothing */
 296
 297        /*
 298         * When end points at the '<' that we found, it should have
 299         * matching '>' later, which means 'end' must be strictly
 300         * below len - 1.
 301         */
 302        if (end >= len - 2)
 303                goto skip;
 304
 305        if (part == 'n') {      /* name */
 306                while (end > 0 && isspace(msg[end - 1]))
 307                        end--;
 308                strbuf_add(sb, msg, end);
 309                return placeholder_len;
 310        }
 311        start = ++end; /* save email start position */
 312
 313        /* advance 'end' to point to email end delimiter */
 314        for ( ; end < len && msg[end] != '>'; end++)
 315                ; /* do nothing */
 316
 317        if (end >= len)
 318                goto skip;
 319
 320        if (part == 'e') {      /* email */
 321                strbuf_add(sb, msg + start, end - start);
 322                return placeholder_len;
 323        }
 324
 325        /* advance 'start' to point to date start delimiter */
 326        for (start = end + 1; start < len && isspace(msg[start]); start++)
 327                ; /* do nothing */
 328        if (start >= len)
 329                goto skip;
 330        date = strtoul(msg + start, &ep, 10);
 331        if (msg + start == ep)
 332                goto skip;
 333
 334        if (part == 't') {      /* date, UNIX timestamp */
 335                strbuf_add(sb, msg + start, ep - (msg + start));
 336                return placeholder_len;
 337        }
 338
 339        /* parse tz */
 340        for (start = ep - msg + 1; start < len && isspace(msg[start]); start++)
 341                ; /* do nothing */
 342        if (start + 1 < len) {
 343                tz = strtoul(msg + start + 1, NULL, 10);
 344                if (msg[start] == '-')
 345                        tz = -tz;
 346        }
 347
 348        switch (part) {
 349        case 'd':       /* date */
 350                strbuf_addstr(sb, show_date(date, tz, DATE_NORMAL));
 351                return placeholder_len;
 352        case 'D':       /* date, RFC2822 style */
 353                strbuf_addstr(sb, show_date(date, tz, DATE_RFC2822));
 354                return placeholder_len;
 355        case 'r':       /* date, relative */
 356                strbuf_addstr(sb, show_date(date, tz, DATE_RELATIVE));
 357                return placeholder_len;
 358        case 'i':       /* date, ISO 8601 */
 359                strbuf_addstr(sb, show_date(date, tz, DATE_ISO8601));
 360                return placeholder_len;
 361        }
 362
 363skip:
 364        /*
 365         * bogus commit, 'sb' cannot be updated, but we still need to
 366         * compute a valid return value.
 367         */
 368        if (part == 'n' || part == 'e' || part == 't' || part == 'd'
 369            || part == 'D' || part == 'r' || part == 'i')
 370                return placeholder_len;
 371
 372        return 0; /* unknown placeholder */
 373}
 374
 375struct chunk {
 376        size_t off;
 377        size_t len;
 378};
 379
 380struct format_commit_context {
 381        const struct commit *commit;
 382
 383        /* These offsets are relative to the start of the commit message. */
 384        int commit_header_parsed;
 385        struct chunk subject;
 386        struct chunk author;
 387        struct chunk committer;
 388        struct chunk encoding;
 389        size_t body_off;
 390
 391        /* The following ones are relative to the result struct strbuf. */
 392        struct chunk abbrev_commit_hash;
 393        struct chunk abbrev_tree_hash;
 394        struct chunk abbrev_parent_hashes;
 395};
 396
 397static int add_again(struct strbuf *sb, struct chunk *chunk)
 398{
 399        if (chunk->len) {
 400                strbuf_adddup(sb, chunk->off, chunk->len);
 401                return 1;
 402        }
 403
 404        /*
 405         * We haven't seen this chunk before.  Our caller is surely
 406         * going to add it the hard way now.  Remember the most likely
 407         * start of the to-be-added chunk: the current end of the
 408         * struct strbuf.
 409         */
 410        chunk->off = sb->len;
 411        return 0;
 412}
 413
 414static void parse_commit_header(struct format_commit_context *context)
 415{
 416        const char *msg = context->commit->buffer;
 417        int i;
 418        enum { HEADER, SUBJECT, BODY } state;
 419
 420        for (i = 0, state = HEADER; msg[i] && state < BODY; i++) {
 421                int eol;
 422                for (eol = i; msg[eol] && msg[eol] != '\n'; eol++)
 423                        ; /* do nothing */
 424
 425                if (state == SUBJECT) {
 426                        context->subject.off = i;
 427                        context->subject.len = eol - i;
 428                        i = eol;
 429                }
 430                if (i == eol) {
 431                        state++;
 432                        /* strip empty lines */
 433                        while (msg[eol] == '\n' && msg[eol + 1] == '\n')
 434                                eol++;
 435                } else if (!prefixcmp(msg + i, "author ")) {
 436                        context->author.off = i + 7;
 437                        context->author.len = eol - i - 7;
 438                } else if (!prefixcmp(msg + i, "committer ")) {
 439                        context->committer.off = i + 10;
 440                        context->committer.len = eol - i - 10;
 441                } else if (!prefixcmp(msg + i, "encoding ")) {
 442                        context->encoding.off = i + 9;
 443                        context->encoding.len = eol - i - 9;
 444                }
 445                i = eol;
 446                if (!msg[i])
 447                        break;
 448        }
 449        context->body_off = i;
 450        context->commit_header_parsed = 1;
 451}
 452
 453static size_t format_commit_item(struct strbuf *sb, const char *placeholder,
 454                               void *context)
 455{
 456        struct format_commit_context *c = context;
 457        const struct commit *commit = c->commit;
 458        const char *msg = commit->buffer;
 459        struct commit_list *p;
 460        int h1, h2;
 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        case 'x':
 483                /* %x00 == NUL, %x0a == LF, etc. */
 484                if (0 <= (h1 = hexval_table[0xff & placeholder[1]]) &&
 485                    h1 <= 16 &&
 486                    0 <= (h2 = hexval_table[0xff & placeholder[2]]) &&
 487                    h2 <= 16) {
 488                        strbuf_addch(sb, (h1<<4)|h2);
 489                        return 3;
 490                } else
 491                        return 0;
 492        }
 493
 494        /* these depend on the commit */
 495        if (!commit->object.parsed)
 496                parse_object(commit->object.sha1);
 497
 498        switch (placeholder[0]) {
 499        case 'H':               /* commit hash */
 500                strbuf_addstr(sb, sha1_to_hex(commit->object.sha1));
 501                return 1;
 502        case 'h':               /* abbreviated commit hash */
 503                if (add_again(sb, &c->abbrev_commit_hash))
 504                        return 1;
 505                strbuf_addstr(sb, find_unique_abbrev(commit->object.sha1,
 506                                                     DEFAULT_ABBREV));
 507                c->abbrev_commit_hash.len = sb->len - c->abbrev_commit_hash.off;
 508                return 1;
 509        case 'T':               /* tree hash */
 510                strbuf_addstr(sb, sha1_to_hex(commit->tree->object.sha1));
 511                return 1;
 512        case 't':               /* abbreviated tree hash */
 513                if (add_again(sb, &c->abbrev_tree_hash))
 514                        return 1;
 515                strbuf_addstr(sb, find_unique_abbrev(commit->tree->object.sha1,
 516                                                     DEFAULT_ABBREV));
 517                c->abbrev_tree_hash.len = sb->len - c->abbrev_tree_hash.off;
 518                return 1;
 519        case 'P':               /* parent hashes */
 520                for (p = commit->parents; p; p = p->next) {
 521                        if (p != commit->parents)
 522                                strbuf_addch(sb, ' ');
 523                        strbuf_addstr(sb, sha1_to_hex(p->item->object.sha1));
 524                }
 525                return 1;
 526        case 'p':               /* abbreviated parent hashes */
 527                if (add_again(sb, &c->abbrev_parent_hashes))
 528                        return 1;
 529                for (p = commit->parents; p; p = p->next) {
 530                        if (p != commit->parents)
 531                                strbuf_addch(sb, ' ');
 532                        strbuf_addstr(sb, find_unique_abbrev(
 533                                        p->item->object.sha1, DEFAULT_ABBREV));
 534                }
 535                c->abbrev_parent_hashes.len = sb->len -
 536                                              c->abbrev_parent_hashes.off;
 537                return 1;
 538        case 'm':               /* left/right/bottom */
 539                strbuf_addch(sb, (commit->object.flags & BOUNDARY)
 540                                 ? '-'
 541                                 : (commit->object.flags & SYMMETRIC_LEFT)
 542                                 ? '<'
 543                                 : '>');
 544                return 1;
 545        }
 546
 547        /* For the rest we have to parse the commit header. */
 548        if (!c->commit_header_parsed)
 549                parse_commit_header(c);
 550
 551        switch (placeholder[0]) {
 552        case 's':       /* subject */
 553                strbuf_add(sb, msg + c->subject.off, c->subject.len);
 554                return 1;
 555        case 'a':       /* author ... */
 556                return format_person_part(sb, placeholder[1],
 557                                   msg + c->author.off, c->author.len);
 558        case 'c':       /* committer ... */
 559                return format_person_part(sb, placeholder[1],
 560                                   msg + c->committer.off, c->committer.len);
 561        case 'e':       /* encoding */
 562                strbuf_add(sb, msg + c->encoding.off, c->encoding.len);
 563                return 1;
 564        case 'b':       /* body */
 565                strbuf_addstr(sb, msg + c->body_off);
 566                return 1;
 567        }
 568        return 0;       /* unknown placeholder */
 569}
 570
 571void format_commit_message(const struct commit *commit,
 572                           const void *format, struct strbuf *sb)
 573{
 574        struct format_commit_context context;
 575
 576        memset(&context, 0, sizeof(context));
 577        context.commit = commit;
 578        strbuf_expand(sb, format, format_commit_item, &context);
 579}
 580
 581static void pp_header(enum cmit_fmt fmt,
 582                      int abbrev,
 583                      enum date_mode dmode,
 584                      const char *encoding,
 585                      const struct commit *commit,
 586                      const char **msg_p,
 587                      struct strbuf *sb)
 588{
 589        int parents_shown = 0;
 590
 591        for (;;) {
 592                const char *line = *msg_p;
 593                int linelen = get_one_line(*msg_p);
 594
 595                if (!linelen)
 596                        return;
 597                *msg_p += linelen;
 598
 599                if (linelen == 1)
 600                        /* End of header */
 601                        return;
 602
 603                if (fmt == CMIT_FMT_RAW) {
 604                        strbuf_add(sb, line, linelen);
 605                        continue;
 606                }
 607
 608                if (!memcmp(line, "parent ", 7)) {
 609                        if (linelen != 48)
 610                                die("bad parent line in commit");
 611                        continue;
 612                }
 613
 614                if (!parents_shown) {
 615                        struct commit_list *parent;
 616                        int num;
 617                        for (parent = commit->parents, num = 0;
 618                             parent;
 619                             parent = parent->next, num++)
 620                                ;
 621                        /* with enough slop */
 622                        strbuf_grow(sb, num * 50 + 20);
 623                        add_merge_info(fmt, sb, commit, abbrev);
 624                        parents_shown = 1;
 625                }
 626
 627                /*
 628                 * MEDIUM == DEFAULT shows only author with dates.
 629                 * FULL shows both authors but not dates.
 630                 * FULLER shows both authors and dates.
 631                 */
 632                if (!memcmp(line, "author ", 7)) {
 633                        strbuf_grow(sb, linelen + 80);
 634                        pp_user_info("Author", fmt, sb, line + 7, dmode, encoding);
 635                }
 636                if (!memcmp(line, "committer ", 10) &&
 637                    (fmt == CMIT_FMT_FULL || fmt == CMIT_FMT_FULLER)) {
 638                        strbuf_grow(sb, linelen + 80);
 639                        pp_user_info("Commit", fmt, sb, line + 10, dmode, encoding);
 640                }
 641        }
 642}
 643
 644void pp_title_line(enum cmit_fmt fmt,
 645                   const char **msg_p,
 646                   struct strbuf *sb,
 647                   const char *subject,
 648                   const char *after_subject,
 649                   const char *encoding,
 650                   int need_8bit_cte)
 651{
 652        struct strbuf title;
 653
 654        strbuf_init(&title, 80);
 655
 656        for (;;) {
 657                const char *line = *msg_p;
 658                int linelen = get_one_line(line);
 659
 660                *msg_p += linelen;
 661                if (!linelen || is_empty_line(line, &linelen))
 662                        break;
 663
 664                strbuf_grow(&title, linelen + 2);
 665                if (title.len) {
 666                        if (fmt == CMIT_FMT_EMAIL) {
 667                                strbuf_addch(&title, '\n');
 668                        }
 669                        strbuf_addch(&title, ' ');
 670                }
 671                strbuf_add(&title, line, linelen);
 672        }
 673
 674        strbuf_grow(sb, title.len + 1024);
 675        if (subject) {
 676                strbuf_addstr(sb, subject);
 677                add_rfc2047(sb, title.buf, title.len, encoding);
 678        } else {
 679                strbuf_addbuf(sb, &title);
 680        }
 681        strbuf_addch(sb, '\n');
 682
 683        if (need_8bit_cte > 0) {
 684                const char *header_fmt =
 685                        "MIME-Version: 1.0\n"
 686                        "Content-Type: text/plain; charset=%s\n"
 687                        "Content-Transfer-Encoding: 8bit\n";
 688                strbuf_addf(sb, header_fmt, encoding);
 689        }
 690        if (after_subject) {
 691                strbuf_addstr(sb, after_subject);
 692        }
 693        if (fmt == CMIT_FMT_EMAIL) {
 694                strbuf_addch(sb, '\n');
 695        }
 696        strbuf_release(&title);
 697}
 698
 699void pp_remainder(enum cmit_fmt fmt,
 700                  const char **msg_p,
 701                  struct strbuf *sb,
 702                  int indent)
 703{
 704        int first = 1;
 705        for (;;) {
 706                const char *line = *msg_p;
 707                int linelen = get_one_line(line);
 708                *msg_p += linelen;
 709
 710                if (!linelen)
 711                        break;
 712
 713                if (is_empty_line(line, &linelen)) {
 714                        if (first)
 715                                continue;
 716                        if (fmt == CMIT_FMT_SHORT)
 717                                break;
 718                }
 719                first = 0;
 720
 721                strbuf_grow(sb, linelen + indent + 20);
 722                if (indent) {
 723                        memset(sb->buf + sb->len, ' ', indent);
 724                        strbuf_setlen(sb, sb->len + indent);
 725                }
 726                strbuf_add(sb, line, linelen);
 727                strbuf_addch(sb, '\n');
 728        }
 729}
 730
 731void pretty_print_commit(enum cmit_fmt fmt, const struct commit *commit,
 732                         struct strbuf *sb, int abbrev,
 733                         const char *subject, const char *after_subject,
 734                         enum date_mode dmode, int need_8bit_cte)
 735{
 736        unsigned long beginning_of_body;
 737        int indent = 4;
 738        const char *msg = commit->buffer;
 739        char *reencoded;
 740        const char *encoding;
 741
 742        if (fmt == CMIT_FMT_USERFORMAT) {
 743                format_commit_message(commit, user_format, sb);
 744                return;
 745        }
 746
 747        encoding = (git_log_output_encoding
 748                    ? git_log_output_encoding
 749                    : git_commit_encoding);
 750        if (!encoding)
 751                encoding = "utf-8";
 752        reencoded = logmsg_reencode(commit, encoding);
 753        if (reencoded) {
 754                msg = reencoded;
 755        }
 756
 757        if (fmt == CMIT_FMT_ONELINE || fmt == CMIT_FMT_EMAIL)
 758                indent = 0;
 759
 760        /*
 761         * We need to check and emit Content-type: to mark it
 762         * as 8-bit if we haven't done so.
 763         */
 764        if (fmt == CMIT_FMT_EMAIL && need_8bit_cte == 0) {
 765                int i, ch, in_body;
 766
 767                for (in_body = i = 0; (ch = msg[i]); i++) {
 768                        if (!in_body) {
 769                                /* author could be non 7-bit ASCII but
 770                                 * the log may be so; skip over the
 771                                 * header part first.
 772                                 */
 773                                if (ch == '\n' && msg[i+1] == '\n')
 774                                        in_body = 1;
 775                        }
 776                        else if (non_ascii(ch)) {
 777                                need_8bit_cte = 1;
 778                                break;
 779                        }
 780                }
 781        }
 782
 783        pp_header(fmt, abbrev, dmode, encoding, commit, &msg, sb);
 784        if (fmt != CMIT_FMT_ONELINE && !subject) {
 785                strbuf_addch(sb, '\n');
 786        }
 787
 788        /* Skip excess blank lines at the beginning of body, if any... */
 789        for (;;) {
 790                int linelen = get_one_line(msg);
 791                int ll = linelen;
 792                if (!linelen)
 793                        break;
 794                if (!is_empty_line(msg, &ll))
 795                        break;
 796                msg += linelen;
 797        }
 798
 799        /* These formats treat the title line specially. */
 800        if (fmt == CMIT_FMT_ONELINE || fmt == CMIT_FMT_EMAIL)
 801                pp_title_line(fmt, &msg, sb, subject,
 802                              after_subject, encoding, need_8bit_cte);
 803
 804        beginning_of_body = sb->len;
 805        if (fmt != CMIT_FMT_ONELINE)
 806                pp_remainder(fmt, &msg, sb, indent);
 807        strbuf_rtrim(sb);
 808
 809        /* Make sure there is an EOLN for the non-oneline case */
 810        if (fmt != CMIT_FMT_ONELINE)
 811                strbuf_addch(sb, '\n');
 812
 813        /*
 814         * The caller may append additional body text in e-mail
 815         * format.  Make sure we did not strip the blank line
 816         * between the header and the body.
 817         */
 818        if (fmt == CMIT_FMT_EMAIL && sb->len <= beginning_of_body)
 819                strbuf_addch(sb, '\n');
 820        free(reencoded);
 821}