pretty.con commit Merge branch 'db/checkout' (5a4d707)
   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                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 */
  50static 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 */
  66int non_ascii(int ch)
  67{
  68        ch = (ch & 0xff);
  69        return ((ch & 0x80) || (ch == 0x1b));
  70}
  71
  72static int is_rfc2047_special(char ch)
  73{
  74        return (non_ascii(ch) || (ch == '=') || (ch == '?') || (ch == '_'));
  75}
  76
  77static 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
  92needquote:
  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
 113void pp_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
 166static 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
 175static 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
 202static 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
 226static 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
 258static 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
 285static 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
 364skip:
 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
 376struct chunk {
 377        size_t off;
 378        size_t len;
 379};
 380
 381struct 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
 398static 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
 415static 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
 454static 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
 561void 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
 571static 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                        pp_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                        pp_user_info("Commit", fmt, sb, line + 10, dmode, encoding);
 630                }
 631        }
 632}
 633
 634void 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
 689void 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
 721void 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}