Andrew's git / gitweb.git / pretty.c
?
pretty.con commit apply --whitespace=fix: fix handling of blank lines at the eof (ef2035c)
   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
   9static char *user_format;
  10
  11void get_commit_format(const char *arg, struct rev_info *rev)
  12{
  13        int i;
  14        static struct cmt_fmt_map {
  15                const char *n;
  16                size_t cmp_len;
  17                enum cmit_fmt v;
  18        } cmt_fmts[] = {
  19                { "raw",        1,      CMIT_FMT_RAW },
  20                { "medium",     1,      CMIT_FMT_MEDIUM },
  21                { "short",      1,      CMIT_FMT_SHORT },
  22                { "email",      1,      CMIT_FMT_EMAIL },
  23                { "full",       5,      CMIT_FMT_FULL },
  24                { "fuller",     5,      CMIT_FMT_FULLER },
  25                { "oneline",    1,      CMIT_FMT_ONELINE },
  26        };
  27
  28        rev->use_terminator = 0;
  29        if (!arg || !*arg) {
  30                rev->commit_format = CMIT_FMT_DEFAULT;
  31                return;
  32        }
  33        if (!prefixcmp(arg, "format:") || !prefixcmp(arg, "tformat:")) {
  34                const char *cp = strchr(arg, ':') + 1;
  35                free(user_format);
  36                user_format = xstrdup(cp);
  37                if (arg[0] == 't')
  38                        rev->use_terminator = 1;
  39                rev->commit_format = CMIT_FMT_USERFORMAT;
  40                return;
  41        }
  42        for (i = 0; i < ARRAY_SIZE(cmt_fmts); i++) {
  43                if (!strncmp(arg, cmt_fmts[i].n, cmt_fmts[i].cmp_len) &&
  44                    !strncmp(arg, cmt_fmts[i].n, strlen(arg))) {
  45                        if (cmt_fmts[i].v == CMIT_FMT_ONELINE)
  46                                rev->use_terminator = 1;
  47                        rev->commit_format = cmt_fmts[i].v;
  48                        return;
  49                }
  50        }
  51
  52        die("invalid --pretty format: %s", arg);
  53}
  54
  55/*
  56 * Generic support for pretty-printing the header
  57 */
  58static int get_one_line(const char *msg)
  59{
  60        int ret = 0;
  61
  62        for (;;) {
  63                char c = *msg++;
  64                if (!c)
  65                        break;
  66                ret++;
  67                if (c == '\n')
  68                        break;
  69        }
  70        return ret;
  71}
  72
  73/* High bit set, or ISO-2022-INT */
  74int non_ascii(int ch)
  75{
  76        ch = (ch & 0xff);
  77        return ((ch & 0x80) || (ch == 0x1b));
  78}
  79
  80static int is_rfc2047_special(char ch)
  81{
  82        return (non_ascii(ch) || (ch == '=') || (ch == '?') || (ch == '_'));
  83}
  84
  85static void add_rfc2047(struct strbuf *sb, const char *line, int len,
  86                       const char *encoding)
  87{
  88        int i, last;
  89
  90        for (i = 0; i < len; i++) {
  91                int ch = line[i];
  92                if (non_ascii(ch))
  93                        goto needquote;
  94                if ((i + 1 < len) && (ch == '=' && line[i+1] == '?'))
  95                        goto needquote;
  96        }
  97        strbuf_add(sb, line, len);
  98        return;
  99
 100needquote:
 101        strbuf_grow(sb, len * 3 + strlen(encoding) + 100);
 102        strbuf_addf(sb, "=?%s?q?", encoding);
 103        for (i = last = 0; i < len; i++) {
 104                unsigned ch = line[i] & 0xFF;
 105                /*
 106                 * We encode ' ' using '=20' even though rfc2047
 107                 * allows using '_' for readability.  Unfortunately,
 108                 * many programs do not understand this and just
 109                 * leave the underscore in place.
 110                 */
 111                if (is_rfc2047_special(ch) || ch == ' ') {
 112                        strbuf_add(sb, line + last, i - last);
 113                        strbuf_addf(sb, "=%02X", ch);
 114                        last = i + 1;
 115                }
 116        }
 117        strbuf_add(sb, line + last, len - last);
 118        strbuf_addstr(sb, "?=");
 119}
 120
 121void pp_user_info(const char *what, enum cmit_fmt fmt, struct strbuf *sb,
 122                  const char *line, enum date_mode dmode,
 123                  const char *encoding)
 124{
 125        char *date;
 126        int namelen;
 127        unsigned long time;
 128        int tz;
 129        const char *filler = "    ";
 130
 131        if (fmt == CMIT_FMT_ONELINE)
 132                return;
 133        date = strchr(line, '>');
 134        if (!date)
 135                return;
 136        namelen = ++date - line;
 137        time = strtoul(date, &date, 10);
 138        tz = strtol(date, NULL, 10);
 139
 140        if (fmt == CMIT_FMT_EMAIL) {
 141                char *name_tail = strchr(line, '<');
 142                int display_name_length;
 143                if (!name_tail)
 144                        return;
 145                while (line < name_tail && isspace(name_tail[-1]))
 146                        name_tail--;
 147                display_name_length = name_tail - line;
 148                filler = "";
 149                strbuf_addstr(sb, "From: ");
 150                add_rfc2047(sb, line, display_name_length, encoding);
 151                strbuf_add(sb, name_tail, namelen - display_name_length);
 152                strbuf_addch(sb, '\n');
 153        } else {
 154                strbuf_addf(sb, "%s: %.*s%.*s\n", what,
 155                              (fmt == CMIT_FMT_FULLER) ? 4 : 0,
 156                              filler, namelen, line);
 157        }
 158        switch (fmt) {
 159        case CMIT_FMT_MEDIUM:
 160                strbuf_addf(sb, "Date:   %s\n", show_date(time, tz, dmode));
 161                break;
 162        case CMIT_FMT_EMAIL:
 163                strbuf_addf(sb, "Date: %s\n", show_date(time, tz, DATE_RFC2822));
 164                break;
 165        case CMIT_FMT_FULLER:
 166                strbuf_addf(sb, "%sDate: %s\n", what, show_date(time, tz, dmode));
 167                break;
 168        default:
 169                /* notin' */
 170                break;
 171        }
 172}
 173
 174static int is_empty_line(const char *line, int *len_p)
 175{
 176        int len = *len_p;
 177        while (len && isspace(line[len-1]))
 178                len--;
 179        *len_p = len;
 180        return !len;
 181}
 182
 183static void add_merge_info(enum cmit_fmt fmt, struct strbuf *sb,
 184                        const struct commit *commit, int abbrev)
 185{
 186        struct commit_list *parent = commit->parents;
 187
 188        if ((fmt == CMIT_FMT_ONELINE) || (fmt == CMIT_FMT_EMAIL) ||
 189            !parent || !parent->next)
 190                return;
 191
 192        strbuf_addstr(sb, "Merge:");
 193
 194        while (parent) {
 195                struct commit *p = parent->item;
 196                const char *hex = NULL;
 197                const char *dots;
 198                if (abbrev)
 199                        hex = find_unique_abbrev(p->object.sha1, abbrev);
 200                if (!hex)
 201                        hex = sha1_to_hex(p->object.sha1);
 202                dots = (abbrev && strlen(hex) != 40) ?  "..." : "";
 203                parent = parent->next;
 204
 205                strbuf_addf(sb, " %s%s", hex, dots);
 206        }
 207        strbuf_addch(sb, '\n');
 208}
 209
 210static char *get_header(const struct commit *commit, const char *key)
 211{
 212        int key_len = strlen(key);
 213        const char *line = commit->buffer;
 214
 215        for (;;) {
 216                const char *eol = strchr(line, '\n'), *next;
 217
 218                if (line == eol)
 219                        return NULL;
 220                if (!eol) {
 221                        eol = line + strlen(line);
 222                        next = NULL;
 223                } else
 224                        next = eol + 1;
 225                if (eol - line > key_len &&
 226                    !strncmp(line, key, key_len) &&
 227                    line[key_len] == ' ') {
 228                        return xmemdupz(line + key_len + 1, eol - line - key_len - 1);
 229                }
 230                line = next;
 231        }
 232}
 233
 234static char *replace_encoding_header(char *buf, const char *encoding)
 235{
 236        struct strbuf tmp;
 237        size_t start, len;
 238        char *cp = buf;
 239
 240        /* guess if there is an encoding header before a \n\n */
 241        while (strncmp(cp, "encoding ", strlen("encoding "))) {
 242                cp = strchr(cp, '\n');
 243                if (!cp || *++cp == '\n')
 244                        return buf;
 245        }
 246        start = cp - buf;
 247        cp = strchr(cp, '\n');
 248        if (!cp)
 249                return buf; /* should not happen but be defensive */
 250        len = cp + 1 - (buf + start);
 251
 252        strbuf_init(&tmp, 0);
 253        strbuf_attach(&tmp, buf, strlen(buf), strlen(buf) + 1);
 254        if (is_encoding_utf8(encoding)) {
 255                /* we have re-coded to UTF-8; drop the header */
 256                strbuf_remove(&tmp, start, len);
 257        } else {
 258                /* just replaces XXXX in 'encoding XXXX\n' */
 259                strbuf_splice(&tmp, start + strlen("encoding "),
 260                                          len - strlen("encoding \n"),
 261                                          encoding, strlen(encoding));
 262        }
 263        return strbuf_detach(&tmp, NULL);
 264}
 265
 266static char *logmsg_reencode(const struct commit *commit,
 267                             const char *output_encoding)
 268{
 269        static const char *utf8 = "utf-8";
 270        const char *use_encoding;
 271        char *encoding;
 272        char *out;
 273
 274        if (!*output_encoding)
 275                return NULL;
 276        encoding = get_header(commit, "encoding");
 277        use_encoding = encoding ? encoding : utf8;
 278        if (!strcmp(use_encoding, output_encoding))
 279                if (encoding) /* we'll strip encoding header later */
 280                        out = xstrdup(commit->buffer);
 281                else
 282                        return NULL; /* nothing to do */
 283        else
 284                out = reencode_string(commit->buffer,
 285                                      output_encoding, use_encoding);
 286        if (out)
 287                out = replace_encoding_header(out, output_encoding);
 288
 289        free(encoding);
 290        return out;
 291}
 292
 293static int mailmap_name(struct strbuf *sb, const char *email)
 294{
 295        static struct string_list *mail_map;
 296        char buffer[1024];
 297
 298        if (!mail_map) {
 299                mail_map = xcalloc(1, sizeof(*mail_map));
 300                read_mailmap(mail_map, ".mailmap", NULL);
 301        }
 302
 303        if (!mail_map->nr)
 304                return -1;
 305
 306        if (!map_email(mail_map, email, buffer, sizeof(buffer)))
 307                return -1;
 308        strbuf_addstr(sb, buffer);
 309        return 0;
 310}
 311
 312static size_t format_person_part(struct strbuf *sb, char part,
 313                                 const char *msg, int len, enum date_mode dmode)
 314{
 315        /* currently all placeholders have same length */
 316        const int placeholder_len = 2;
 317        int start, end, tz = 0;
 318        unsigned long date = 0;
 319        char *ep;
 320
 321        /* advance 'end' to point to email start delimiter */
 322        for (end = 0; end < len && msg[end] != '<'; end++)
 323                ; /* do nothing */
 324
 325        /*
 326         * When end points at the '<' that we found, it should have
 327         * matching '>' later, which means 'end' must be strictly
 328         * below len - 1.
 329         */
 330        if (end >= len - 2)
 331                goto skip;
 332
 333        if (part == 'n' || part == 'N') {       /* name */
 334                while (end > 0 && isspace(msg[end - 1]))
 335                        end--;
 336                if (part != 'N' || !msg[end] || !msg[end + 1] ||
 337                    mailmap_name(sb, msg + end + 2) < 0)
 338                        strbuf_add(sb, msg, end);
 339                return placeholder_len;
 340        }
 341        start = ++end; /* save email start position */
 342
 343        /* advance 'end' to point to email end delimiter */
 344        for ( ; end < len && msg[end] != '>'; end++)
 345                ; /* do nothing */
 346
 347        if (end >= len)
 348                goto skip;
 349
 350        if (part == 'e') {      /* email */
 351                strbuf_add(sb, msg + start, end - start);
 352                return placeholder_len;
 353        }
 354
 355        /* advance 'start' to point to date start delimiter */
 356        for (start = end + 1; start < len && isspace(msg[start]); start++)
 357                ; /* do nothing */
 358        if (start >= len)
 359                goto skip;
 360        date = strtoul(msg + start, &ep, 10);
 361        if (msg + start == ep)
 362                goto skip;
 363
 364        if (part == 't') {      /* date, UNIX timestamp */
 365                strbuf_add(sb, msg + start, ep - (msg + start));
 366                return placeholder_len;
 367        }
 368
 369        /* parse tz */
 370        for (start = ep - msg + 1; start < len && isspace(msg[start]); start++)
 371                ; /* do nothing */
 372        if (start + 1 < len) {
 373                tz = strtoul(msg + start + 1, NULL, 10);
 374                if (msg[start] == '-')
 375                        tz = -tz;
 376        }
 377
 378        switch (part) {
 379        case 'd':       /* date */
 380                strbuf_addstr(sb, show_date(date, tz, dmode));
 381                return placeholder_len;
 382        case 'D':       /* date, RFC2822 style */
 383                strbuf_addstr(sb, show_date(date, tz, DATE_RFC2822));
 384                return placeholder_len;
 385        case 'r':       /* date, relative */
 386                strbuf_addstr(sb, show_date(date, tz, DATE_RELATIVE));
 387                return placeholder_len;
 388        case 'i':       /* date, ISO 8601 */
 389                strbuf_addstr(sb, show_date(date, tz, DATE_ISO8601));
 390                return placeholder_len;
 391        }
 392
 393skip:
 394        /*
 395         * bogus commit, 'sb' cannot be updated, but we still need to
 396         * compute a valid return value.
 397         */
 398        if (part == 'n' || part == 'e' || part == 't' || part == 'd'
 399            || part == 'D' || part == 'r' || part == 'i')
 400                return placeholder_len;
 401
 402        return 0; /* unknown placeholder */
 403}
 404
 405struct chunk {
 406        size_t off;
 407        size_t len;
 408};
 409
 410struct format_commit_context {
 411        const struct commit *commit;
 412        enum date_mode dmode;
 413
 414        /* These offsets are relative to the start of the commit message. */
 415        int commit_header_parsed;
 416        struct chunk subject;
 417        struct chunk author;
 418        struct chunk committer;
 419        struct chunk encoding;
 420        size_t body_off;
 421
 422        /* The following ones are relative to the result struct strbuf. */
 423        struct chunk abbrev_commit_hash;
 424        struct chunk abbrev_tree_hash;
 425        struct chunk abbrev_parent_hashes;
 426};
 427
 428static int add_again(struct strbuf *sb, struct chunk *chunk)
 429{
 430        if (chunk->len) {
 431                strbuf_adddup(sb, chunk->off, chunk->len);
 432                return 1;
 433        }
 434
 435        /*
 436         * We haven't seen this chunk before.  Our caller is surely
 437         * going to add it the hard way now.  Remember the most likely
 438         * start of the to-be-added chunk: the current end of the
 439         * struct strbuf.
 440         */
 441        chunk->off = sb->len;
 442        return 0;
 443}
 444
 445static void parse_commit_header(struct format_commit_context *context)
 446{
 447        const char *msg = context->commit->buffer;
 448        int i;
 449        enum { HEADER, SUBJECT, BODY } state;
 450
 451        for (i = 0, state = HEADER; msg[i] && state < BODY; i++) {
 452                int eol;
 453                for (eol = i; msg[eol] && msg[eol] != '\n'; eol++)
 454                        ; /* do nothing */
 455
 456                if (state == SUBJECT) {
 457                        context->subject.off = i;
 458                        context->subject.len = eol - i;
 459                        i = eol;
 460                }
 461                if (i == eol) {
 462                        state++;
 463                        /* strip empty lines */
 464                        while (msg[eol] == '\n' && msg[eol + 1] == '\n')
 465                                eol++;
 466                } else if (!prefixcmp(msg + i, "author ")) {
 467                        context->author.off = i + 7;
 468                        context->author.len = eol - i - 7;
 469                } else if (!prefixcmp(msg + i, "committer ")) {
 470                        context->committer.off = i + 10;
 471                        context->committer.len = eol - i - 10;
 472                } else if (!prefixcmp(msg + i, "encoding ")) {
 473                        context->encoding.off = i + 9;
 474                        context->encoding.len = eol - i - 9;
 475                }
 476                i = eol;
 477                if (!msg[i])
 478                        break;
 479        }
 480        context->body_off = i;
 481        context->commit_header_parsed = 1;
 482}
 483
 484static size_t format_commit_item(struct strbuf *sb, const char *placeholder,
 485                               void *context)
 486{
 487        struct format_commit_context *c = context;
 488        const struct commit *commit = c->commit;
 489        const char *msg = commit->buffer;
 490        struct commit_list *p;
 491        int h1, h2;
 492
 493        /* these are independent of the commit */
 494        switch (placeholder[0]) {
 495        case 'C':
 496                if (!prefixcmp(placeholder + 1, "red")) {
 497                        strbuf_addstr(sb, "\033[31m");
 498                        return 4;
 499                } else if (!prefixcmp(placeholder + 1, "green")) {
 500                        strbuf_addstr(sb, "\033[32m");
 501                        return 6;
 502                } else if (!prefixcmp(placeholder + 1, "blue")) {
 503                        strbuf_addstr(sb, "\033[34m");
 504                        return 5;
 505                } else if (!prefixcmp(placeholder + 1, "reset")) {
 506                        strbuf_addstr(sb, "\033[m");
 507                        return 6;
 508                } else
 509                        return 0;
 510        case 'n':               /* newline */
 511                strbuf_addch(sb, '\n');
 512                return 1;
 513        case 'x':
 514                /* %x00 == NUL, %x0a == LF, etc. */
 515                if (0 <= (h1 = hexval_table[0xff & placeholder[1]]) &&
 516                    h1 <= 16 &&
 517                    0 <= (h2 = hexval_table[0xff & placeholder[2]]) &&
 518                    h2 <= 16) {
 519                        strbuf_addch(sb, (h1<<4)|h2);
 520                        return 3;
 521                } else
 522                        return 0;
 523        }
 524
 525        /* these depend on the commit */
 526        if (!commit->object.parsed)
 527                parse_object(commit->object.sha1);
 528
 529        switch (placeholder[0]) {
 530        case 'H':               /* commit hash */
 531                strbuf_addstr(sb, sha1_to_hex(commit->object.sha1));
 532                return 1;
 533        case 'h':               /* abbreviated commit hash */
 534                if (add_again(sb, &c->abbrev_commit_hash))
 535                        return 1;
 536                strbuf_addstr(sb, find_unique_abbrev(commit->object.sha1,
 537                                                     DEFAULT_ABBREV));
 538                c->abbrev_commit_hash.len = sb->len - c->abbrev_commit_hash.off;
 539                return 1;
 540        case 'T':               /* tree hash */
 541                strbuf_addstr(sb, sha1_to_hex(commit->tree->object.sha1));
 542                return 1;
 543        case 't':               /* abbreviated tree hash */
 544                if (add_again(sb, &c->abbrev_tree_hash))
 545                        return 1;
 546                strbuf_addstr(sb, find_unique_abbrev(commit->tree->object.sha1,
 547                                                     DEFAULT_ABBREV));
 548                c->abbrev_tree_hash.len = sb->len - c->abbrev_tree_hash.off;
 549                return 1;
 550        case 'P':               /* parent hashes */
 551                for (p = commit->parents; p; p = p->next) {
 552                        if (p != commit->parents)
 553                                strbuf_addch(sb, ' ');
 554                        strbuf_addstr(sb, sha1_to_hex(p->item->object.sha1));
 555                }
 556                return 1;
 557        case 'p':               /* abbreviated parent hashes */
 558                if (add_again(sb, &c->abbrev_parent_hashes))
 559                        return 1;
 560                for (p = commit->parents; p; p = p->next) {
 561                        if (p != commit->parents)
 562                                strbuf_addch(sb, ' ');
 563                        strbuf_addstr(sb, find_unique_abbrev(
 564                                        p->item->object.sha1, DEFAULT_ABBREV));
 565                }
 566                c->abbrev_parent_hashes.len = sb->len -
 567                                              c->abbrev_parent_hashes.off;
 568                return 1;
 569        case 'm':               /* left/right/bottom */
 570                strbuf_addch(sb, (commit->object.flags & BOUNDARY)
 571                                 ? '-'
 572                                 : (commit->object.flags & SYMMETRIC_LEFT)
 573                                 ? '<'
 574                                 : '>');
 575                return 1;
 576        }
 577
 578        /* For the rest we have to parse the commit header. */
 579        if (!c->commit_header_parsed)
 580                parse_commit_header(c);
 581
 582        switch (placeholder[0]) {
 583        case 's':       /* subject */
 584                strbuf_add(sb, msg + c->subject.off, c->subject.len);
 585                return 1;
 586        case 'a':       /* author ... */
 587                return format_person_part(sb, placeholder[1],
 588                                   msg + c->author.off, c->author.len,
 589                                   c->dmode);
 590        case 'c':       /* committer ... */
 591                return format_person_part(sb, placeholder[1],
 592                                   msg + c->committer.off, c->committer.len,
 593                                   c->dmode);
 594        case 'e':       /* encoding */
 595                strbuf_add(sb, msg + c->encoding.off, c->encoding.len);
 596                return 1;
 597        case 'b':       /* body */
 598                strbuf_addstr(sb, msg + c->body_off);
 599                return 1;
 600        }
 601        return 0;       /* unknown placeholder */
 602}
 603
 604void format_commit_message(const struct commit *commit,
 605                           const void *format, struct strbuf *sb,
 606                           enum date_mode dmode)
 607{
 608        struct format_commit_context context;
 609
 610        memset(&context, 0, sizeof(context));
 611        context.commit = commit;
 612        context.dmode = dmode;
 613        strbuf_expand(sb, format, format_commit_item, &context);
 614}
 615
 616static void pp_header(enum cmit_fmt fmt,
 617                      int abbrev,
 618                      enum date_mode dmode,
 619                      const char *encoding,
 620                      const struct commit *commit,
 621                      const char **msg_p,
 622                      struct strbuf *sb)
 623{
 624        int parents_shown = 0;
 625
 626        for (;;) {
 627                const char *line = *msg_p;
 628                int linelen = get_one_line(*msg_p);
 629
 630                if (!linelen)
 631                        return;
 632                *msg_p += linelen;
 633
 634                if (linelen == 1)
 635                        /* End of header */
 636                        return;
 637
 638                if (fmt == CMIT_FMT_RAW) {
 639                        strbuf_add(sb, line, linelen);
 640                        continue;
 641                }
 642
 643                if (!memcmp(line, "parent ", 7)) {
 644                        if (linelen != 48)
 645                                die("bad parent line in commit");
 646                        continue;
 647                }
 648
 649                if (!parents_shown) {
 650                        struct commit_list *parent;
 651                        int num;
 652                        for (parent = commit->parents, num = 0;
 653                             parent;
 654                             parent = parent->next, num++)
 655                                ;
 656                        /* with enough slop */
 657                        strbuf_grow(sb, num * 50 + 20);
 658                        add_merge_info(fmt, sb, commit, abbrev);
 659                        parents_shown = 1;
 660                }
 661
 662                /*
 663                 * MEDIUM == DEFAULT shows only author with dates.
 664                 * FULL shows both authors but not dates.
 665                 * FULLER shows both authors and dates.
 666                 */
 667                if (!memcmp(line, "author ", 7)) {
 668                        strbuf_grow(sb, linelen + 80);
 669                        pp_user_info("Author", fmt, sb, line + 7, dmode, encoding);
 670                }
 671                if (!memcmp(line, "committer ", 10) &&
 672                    (fmt == CMIT_FMT_FULL || fmt == CMIT_FMT_FULLER)) {
 673                        strbuf_grow(sb, linelen + 80);
 674                        pp_user_info("Commit", fmt, sb, line + 10, dmode, encoding);
 675                }
 676        }
 677}
 678
 679void pp_title_line(enum cmit_fmt fmt,
 680                   const char **msg_p,
 681                   struct strbuf *sb,
 682                   const char *subject,
 683                   const char *after_subject,
 684                   const char *encoding,
 685                   int need_8bit_cte)
 686{
 687        struct strbuf title;
 688
 689        strbuf_init(&title, 80);
 690
 691        for (;;) {
 692                const char *line = *msg_p;
 693                int linelen = get_one_line(line);
 694
 695                *msg_p += linelen;
 696                if (!linelen || is_empty_line(line, &linelen))
 697                        break;
 698
 699                strbuf_grow(&title, linelen + 2);
 700                if (title.len) {
 701                        if (fmt == CMIT_FMT_EMAIL) {
 702                                strbuf_addch(&title, '\n');
 703                        }
 704                        strbuf_addch(&title, ' ');
 705                }
 706                strbuf_add(&title, line, linelen);
 707        }
 708
 709        strbuf_grow(sb, title.len + 1024);
 710        if (subject) {
 711                strbuf_addstr(sb, subject);
 712                add_rfc2047(sb, title.buf, title.len, encoding);
 713        } else {
 714                strbuf_addbuf(sb, &title);
 715        }
 716        strbuf_addch(sb, '\n');
 717
 718        if (need_8bit_cte > 0) {
 719                const char *header_fmt =
 720                        "MIME-Version: 1.0\n"
 721                        "Content-Type: text/plain; charset=%s\n"
 722                        "Content-Transfer-Encoding: 8bit\n";
 723                strbuf_addf(sb, header_fmt, encoding);
 724        }
 725        if (after_subject) {
 726                strbuf_addstr(sb, after_subject);
 727        }
 728        if (fmt == CMIT_FMT_EMAIL) {
 729                strbuf_addch(sb, '\n');
 730        }
 731        strbuf_release(&title);
 732}
 733
 734void pp_remainder(enum cmit_fmt fmt,
 735                  const char **msg_p,
 736                  struct strbuf *sb,
 737                  int indent)
 738{
 739        int first = 1;
 740        for (;;) {
 741                const char *line = *msg_p;
 742                int linelen = get_one_line(line);
 743                *msg_p += linelen;
 744
 745                if (!linelen)
 746                        break;
 747
 748                if (is_empty_line(line, &linelen)) {
 749                        if (first)
 750                                continue;
 751                        if (fmt == CMIT_FMT_SHORT)
 752                                break;
 753                }
 754                first = 0;
 755
 756                strbuf_grow(sb, linelen + indent + 20);
 757                if (indent) {
 758                        memset(sb->buf + sb->len, ' ', indent);
 759                        strbuf_setlen(sb, sb->len + indent);
 760                }
 761                strbuf_add(sb, line, linelen);
 762                strbuf_addch(sb, '\n');
 763        }
 764}
 765
 766void pretty_print_commit(enum cmit_fmt fmt, const struct commit *commit,
 767                         struct strbuf *sb, int abbrev,
 768                         const char *subject, const char *after_subject,
 769                         enum date_mode dmode, int need_8bit_cte)
 770{
 771        unsigned long beginning_of_body;
 772        int indent = 4;
 773        const char *msg = commit->buffer;
 774        char *reencoded;
 775        const char *encoding;
 776
 777        if (fmt == CMIT_FMT_USERFORMAT) {
 778                format_commit_message(commit, user_format, sb, dmode);
 779                return;
 780        }
 781
 782        encoding = (git_log_output_encoding
 783                    ? git_log_output_encoding
 784                    : git_commit_encoding);
 785        if (!encoding)
 786                encoding = "utf-8";
 787        reencoded = logmsg_reencode(commit, encoding);
 788        if (reencoded) {
 789                msg = reencoded;
 790        }
 791
 792        if (fmt == CMIT_FMT_ONELINE || fmt == CMIT_FMT_EMAIL)
 793                indent = 0;
 794
 795        /*
 796         * We need to check and emit Content-type: to mark it
 797         * as 8-bit if we haven't done so.
 798         */
 799        if (fmt == CMIT_FMT_EMAIL && need_8bit_cte == 0) {
 800                int i, ch, in_body;
 801
 802                for (in_body = i = 0; (ch = msg[i]); i++) {
 803                        if (!in_body) {
 804                                /* author could be non 7-bit ASCII but
 805                                 * the log may be so; skip over the
 806                                 * header part first.
 807                                 */
 808                                if (ch == '\n' && msg[i+1] == '\n')
 809                                        in_body = 1;
 810                        }
 811                        else if (non_ascii(ch)) {
 812                                need_8bit_cte = 1;
 813                                break;
 814                        }
 815                }
 816        }
 817
 818        pp_header(fmt, abbrev, dmode, encoding, commit, &msg, sb);
 819        if (fmt != CMIT_FMT_ONELINE && !subject) {
 820                strbuf_addch(sb, '\n');
 821        }
 822
 823        /* Skip excess blank lines at the beginning of body, if any... */
 824        for (;;) {
 825                int linelen = get_one_line(msg);
 826                int ll = linelen;
 827                if (!linelen)
 828                        break;
 829                if (!is_empty_line(msg, &ll))
 830                        break;
 831                msg += linelen;
 832        }
 833
 834        /* These formats treat the title line specially. */
 835        if (fmt == CMIT_FMT_ONELINE || fmt == CMIT_FMT_EMAIL)
 836                pp_title_line(fmt, &msg, sb, subject,
 837                              after_subject, encoding, need_8bit_cte);
 838
 839        beginning_of_body = sb->len;
 840        if (fmt != CMIT_FMT_ONELINE)
 841                pp_remainder(fmt, &msg, sb, indent);
 842        strbuf_rtrim(sb);
 843
 844        /* Make sure there is an EOLN for the non-oneline case */
 845        if (fmt != CMIT_FMT_ONELINE)
 846                strbuf_addch(sb, '\n');
 847
 848        /*
 849         * The caller may append additional body text in e-mail
 850         * format.  Make sure we did not strip the blank line
 851         * between the header and the body.
 852         */
 853        if (fmt == CMIT_FMT_EMAIL && sb->len <= beginning_of_body)
 854                strbuf_addch(sb, '\n');
 855        free(reencoded);
 856}