Andrew's git / gitweb.git / pretty.c
?
pretty.con commit git-p4: remove tabs from usermap file (3b16739)
   1#include "cache.h"
   2#include "commit.h"
   3#include "utf8.h"
   4#include "diff.h"
   5#include "revision.h"
   6#include "string-list.h"
   7#include "mailmap.h"
   8#include "log-tree.h"
   9#include "color.h"
  10
  11static char *user_format;
  12
  13static void save_user_format(struct rev_info *rev, const char *cp, int is_tformat)
  14{
  15        free(user_format);
  16        user_format = xstrdup(cp);
  17        if (is_tformat)
  18                rev->use_terminator = 1;
  19        rev->commit_format = CMIT_FMT_USERFORMAT;
  20}
  21
  22void get_commit_format(const char *arg, struct rev_info *rev)
  23{
  24        int i;
  25        static struct cmt_fmt_map {
  26                const char *n;
  27                size_t cmp_len;
  28                enum cmit_fmt v;
  29        } cmt_fmts[] = {
  30                { "raw",        1,      CMIT_FMT_RAW },
  31                { "medium",     1,      CMIT_FMT_MEDIUM },
  32                { "short",      1,      CMIT_FMT_SHORT },
  33                { "email",      1,      CMIT_FMT_EMAIL },
  34                { "full",       5,      CMIT_FMT_FULL },
  35                { "fuller",     5,      CMIT_FMT_FULLER },
  36                { "oneline",    1,      CMIT_FMT_ONELINE },
  37        };
  38
  39        rev->use_terminator = 0;
  40        if (!arg || !*arg) {
  41                rev->commit_format = CMIT_FMT_DEFAULT;
  42                return;
  43        }
  44        if (!prefixcmp(arg, "format:") || !prefixcmp(arg, "tformat:")) {
  45                save_user_format(rev, strchr(arg, ':') + 1, arg[0] == 't');
  46                return;
  47        }
  48        for (i = 0; i < ARRAY_SIZE(cmt_fmts); i++) {
  49                if (!strncmp(arg, cmt_fmts[i].n, cmt_fmts[i].cmp_len) &&
  50                    !strncmp(arg, cmt_fmts[i].n, strlen(arg))) {
  51                        if (cmt_fmts[i].v == CMIT_FMT_ONELINE)
  52                                rev->use_terminator = 1;
  53                        rev->commit_format = cmt_fmts[i].v;
  54                        return;
  55                }
  56        }
  57        if (strchr(arg, '%')) {
  58                save_user_format(rev, arg, 1);
  59                return;
  60        }
  61
  62        die("invalid --pretty format: %s", arg);
  63}
  64
  65/*
  66 * Generic support for pretty-printing the header
  67 */
  68static int get_one_line(const char *msg)
  69{
  70        int ret = 0;
  71
  72        for (;;) {
  73                char c = *msg++;
  74                if (!c)
  75                        break;
  76                ret++;
  77                if (c == '\n')
  78                        break;
  79        }
  80        return ret;
  81}
  82
  83/* High bit set, or ISO-2022-INT */
  84int non_ascii(int ch)
  85{
  86        ch = (ch & 0xff);
  87        return ((ch & 0x80) || (ch == 0x1b));
  88}
  89
  90static int is_rfc2047_special(char ch)
  91{
  92        return (non_ascii(ch) || (ch == '=') || (ch == '?') || (ch == '_'));
  93}
  94
  95static void add_rfc2047(struct strbuf *sb, const char *line, int len,
  96                       const char *encoding)
  97{
  98        int i, last;
  99
 100        for (i = 0; i < len; i++) {
 101                int ch = line[i];
 102                if (non_ascii(ch))
 103                        goto needquote;
 104                if ((i + 1 < len) && (ch == '=' && line[i+1] == '?'))
 105                        goto needquote;
 106        }
 107        strbuf_add(sb, line, len);
 108        return;
 109
 110needquote:
 111        strbuf_grow(sb, len * 3 + strlen(encoding) + 100);
 112        strbuf_addf(sb, "=?%s?q?", encoding);
 113        for (i = last = 0; i < len; i++) {
 114                unsigned ch = line[i] & 0xFF;
 115                /*
 116                 * We encode ' ' using '=20' even though rfc2047
 117                 * allows using '_' for readability.  Unfortunately,
 118                 * many programs do not understand this and just
 119                 * leave the underscore in place.
 120                 */
 121                if (is_rfc2047_special(ch) || ch == ' ') {
 122                        strbuf_add(sb, line + last, i - last);
 123                        strbuf_addf(sb, "=%02X", ch);
 124                        last = i + 1;
 125                }
 126        }
 127        strbuf_add(sb, line + last, len - last);
 128        strbuf_addstr(sb, "?=");
 129}
 130
 131void pp_user_info(const char *what, enum cmit_fmt fmt, struct strbuf *sb,
 132                  const char *line, enum date_mode dmode,
 133                  const char *encoding)
 134{
 135        char *date;
 136        int namelen;
 137        unsigned long time;
 138        int tz;
 139        const char *filler = "    ";
 140
 141        if (fmt == CMIT_FMT_ONELINE)
 142                return;
 143        date = strchr(line, '>');
 144        if (!date)
 145                return;
 146        namelen = ++date - line;
 147        time = strtoul(date, &date, 10);
 148        tz = strtol(date, NULL, 10);
 149
 150        if (fmt == CMIT_FMT_EMAIL) {
 151                char *name_tail = strchr(line, '<');
 152                int display_name_length;
 153                if (!name_tail)
 154                        return;
 155                while (line < name_tail && isspace(name_tail[-1]))
 156                        name_tail--;
 157                display_name_length = name_tail - line;
 158                filler = "";
 159                strbuf_addstr(sb, "From: ");
 160                add_rfc2047(sb, line, display_name_length, encoding);
 161                strbuf_add(sb, name_tail, namelen - display_name_length);
 162                strbuf_addch(sb, '\n');
 163        } else {
 164                strbuf_addf(sb, "%s: %.*s%.*s\n", what,
 165                              (fmt == CMIT_FMT_FULLER) ? 4 : 0,
 166                              filler, namelen, line);
 167        }
 168        switch (fmt) {
 169        case CMIT_FMT_MEDIUM:
 170                strbuf_addf(sb, "Date:   %s\n", show_date(time, tz, dmode));
 171                break;
 172        case CMIT_FMT_EMAIL:
 173                strbuf_addf(sb, "Date: %s\n", show_date(time, tz, DATE_RFC2822));
 174                break;
 175        case CMIT_FMT_FULLER:
 176                strbuf_addf(sb, "%sDate: %s\n", what, show_date(time, tz, dmode));
 177                break;
 178        default:
 179                /* notin' */
 180                break;
 181        }
 182}
 183
 184static int is_empty_line(const char *line, int *len_p)
 185{
 186        int len = *len_p;
 187        while (len && isspace(line[len-1]))
 188                len--;
 189        *len_p = len;
 190        return !len;
 191}
 192
 193static const char *skip_empty_lines(const char *msg)
 194{
 195        for (;;) {
 196                int linelen = get_one_line(msg);
 197                int ll = linelen;
 198                if (!linelen)
 199                        break;
 200                if (!is_empty_line(msg, &ll))
 201                        break;
 202                msg += linelen;
 203        }
 204        return msg;
 205}
 206
 207static void add_merge_info(enum cmit_fmt fmt, struct strbuf *sb,
 208                        const struct commit *commit, int abbrev)
 209{
 210        struct commit_list *parent = commit->parents;
 211
 212        if ((fmt == CMIT_FMT_ONELINE) || (fmt == CMIT_FMT_EMAIL) ||
 213            !parent || !parent->next)
 214                return;
 215
 216        strbuf_addstr(sb, "Merge:");
 217
 218        while (parent) {
 219                struct commit *p = parent->item;
 220                const char *hex = NULL;
 221                if (abbrev)
 222                        hex = find_unique_abbrev(p->object.sha1, abbrev);
 223                if (!hex)
 224                        hex = sha1_to_hex(p->object.sha1);
 225                parent = parent->next;
 226
 227                strbuf_addf(sb, " %s", hex);
 228        }
 229        strbuf_addch(sb, '\n');
 230}
 231
 232static char *get_header(const struct commit *commit, const char *key)
 233{
 234        int key_len = strlen(key);
 235        const char *line = commit->buffer;
 236
 237        for (;;) {
 238                const char *eol = strchr(line, '\n'), *next;
 239
 240                if (line == eol)
 241                        return NULL;
 242                if (!eol) {
 243                        eol = line + strlen(line);
 244                        next = NULL;
 245                } else
 246                        next = eol + 1;
 247                if (eol - line > key_len &&
 248                    !strncmp(line, key, key_len) &&
 249                    line[key_len] == ' ') {
 250                        return xmemdupz(line + key_len + 1, eol - line - key_len - 1);
 251                }
 252                line = next;
 253        }
 254}
 255
 256static char *replace_encoding_header(char *buf, const char *encoding)
 257{
 258        struct strbuf tmp = STRBUF_INIT;
 259        size_t start, len;
 260        char *cp = buf;
 261
 262        /* guess if there is an encoding header before a \n\n */
 263        while (strncmp(cp, "encoding ", strlen("encoding "))) {
 264                cp = strchr(cp, '\n');
 265                if (!cp || *++cp == '\n')
 266                        return buf;
 267        }
 268        start = cp - buf;
 269        cp = strchr(cp, '\n');
 270        if (!cp)
 271                return buf; /* should not happen but be defensive */
 272        len = cp + 1 - (buf + start);
 273
 274        strbuf_attach(&tmp, buf, strlen(buf), strlen(buf) + 1);
 275        if (is_encoding_utf8(encoding)) {
 276                /* we have re-coded to UTF-8; drop the header */
 277                strbuf_remove(&tmp, start, len);
 278        } else {
 279                /* just replaces XXXX in 'encoding XXXX\n' */
 280                strbuf_splice(&tmp, start + strlen("encoding "),
 281                                          len - strlen("encoding \n"),
 282                                          encoding, strlen(encoding));
 283        }
 284        return strbuf_detach(&tmp, NULL);
 285}
 286
 287static char *logmsg_reencode(const struct commit *commit,
 288                             const char *output_encoding)
 289{
 290        static const char *utf8 = "utf-8";
 291        const char *use_encoding;
 292        char *encoding;
 293        char *out;
 294
 295        if (!*output_encoding)
 296                return NULL;
 297        encoding = get_header(commit, "encoding");
 298        use_encoding = encoding ? encoding : utf8;
 299        if (!strcmp(use_encoding, output_encoding))
 300                if (encoding) /* we'll strip encoding header later */
 301                        out = xstrdup(commit->buffer);
 302                else
 303                        return NULL; /* nothing to do */
 304        else
 305                out = reencode_string(commit->buffer,
 306                                      output_encoding, use_encoding);
 307        if (out)
 308                out = replace_encoding_header(out, output_encoding);
 309
 310        free(encoding);
 311        return out;
 312}
 313
 314static int mailmap_name(char *email, int email_len, char *name, int name_len)
 315{
 316        static struct string_list *mail_map;
 317        if (!mail_map) {
 318                mail_map = xcalloc(1, sizeof(*mail_map));
 319                read_mailmap(mail_map, NULL);
 320        }
 321        return mail_map->nr && map_user(mail_map, email, email_len, name, name_len);
 322}
 323
 324static size_t format_person_part(struct strbuf *sb, char part,
 325                                 const char *msg, int len, enum date_mode dmode)
 326{
 327        /* currently all placeholders have same length */
 328        const int placeholder_len = 2;
 329        int start, end, tz = 0;
 330        unsigned long date = 0;
 331        char *ep;
 332        const char *name_start, *name_end, *mail_start, *mail_end, *msg_end = msg+len;
 333        char person_name[1024];
 334        char person_mail[1024];
 335
 336        /* advance 'end' to point to email start delimiter */
 337        for (end = 0; end < len && msg[end] != '<'; end++)
 338                ; /* do nothing */
 339
 340        /*
 341         * When end points at the '<' that we found, it should have
 342         * matching '>' later, which means 'end' must be strictly
 343         * below len - 1.
 344         */
 345        if (end >= len - 2)
 346                goto skip;
 347
 348        /* Seek for both name and email part */
 349        name_start = msg;
 350        name_end = msg+end;
 351        while (name_end > name_start && isspace(*(name_end-1)))
 352                name_end--;
 353        mail_start = msg+end+1;
 354        mail_end = mail_start;
 355        while (mail_end < msg_end && *mail_end != '>')
 356                mail_end++;
 357        if (mail_end == msg_end)
 358                goto skip;
 359        end = mail_end-msg;
 360
 361        if (part == 'N' || part == 'E') { /* mailmap lookup */
 362                strlcpy(person_name, name_start, name_end-name_start+1);
 363                strlcpy(person_mail, mail_start, mail_end-mail_start+1);
 364                mailmap_name(person_mail, sizeof(person_mail), person_name, sizeof(person_name));
 365                name_start = person_name;
 366                name_end = name_start + strlen(person_name);
 367                mail_start = person_mail;
 368                mail_end = mail_start +  strlen(person_mail);
 369        }
 370        if (part == 'n' || part == 'N') {       /* name */
 371                strbuf_add(sb, name_start, name_end-name_start);
 372                return placeholder_len;
 373        }
 374        if (part == 'e' || part == 'E') {       /* email */
 375                strbuf_add(sb, mail_start, mail_end-mail_start);
 376                return placeholder_len;
 377        }
 378
 379        /* advance 'start' to point to date start delimiter */
 380        for (start = end + 1; start < len && isspace(msg[start]); start++)
 381                ; /* do nothing */
 382        if (start >= len)
 383                goto skip;
 384        date = strtoul(msg + start, &ep, 10);
 385        if (msg + start == ep)
 386                goto skip;
 387
 388        if (part == 't') {      /* date, UNIX timestamp */
 389                strbuf_add(sb, msg + start, ep - (msg + start));
 390                return placeholder_len;
 391        }
 392
 393        /* parse tz */
 394        for (start = ep - msg + 1; start < len && isspace(msg[start]); start++)
 395                ; /* do nothing */
 396        if (start + 1 < len) {
 397                tz = strtoul(msg + start + 1, NULL, 10);
 398                if (msg[start] == '-')
 399                        tz = -tz;
 400        }
 401
 402        switch (part) {
 403        case 'd':       /* date */
 404                strbuf_addstr(sb, show_date(date, tz, dmode));
 405                return placeholder_len;
 406        case 'D':       /* date, RFC2822 style */
 407                strbuf_addstr(sb, show_date(date, tz, DATE_RFC2822));
 408                return placeholder_len;
 409        case 'r':       /* date, relative */
 410                strbuf_addstr(sb, show_date(date, tz, DATE_RELATIVE));
 411                return placeholder_len;
 412        case 'i':       /* date, ISO 8601 */
 413                strbuf_addstr(sb, show_date(date, tz, DATE_ISO8601));
 414                return placeholder_len;
 415        }
 416
 417skip:
 418        /*
 419         * bogus commit, 'sb' cannot be updated, but we still need to
 420         * compute a valid return value.
 421         */
 422        if (part == 'n' || part == 'e' || part == 't' || part == 'd'
 423            || part == 'D' || part == 'r' || part == 'i')
 424                return placeholder_len;
 425
 426        return 0; /* unknown placeholder */
 427}
 428
 429struct chunk {
 430        size_t off;
 431        size_t len;
 432};
 433
 434struct format_commit_context {
 435        const struct commit *commit;
 436        enum date_mode dmode;
 437        unsigned commit_header_parsed:1;
 438        unsigned commit_message_parsed:1;
 439
 440        /* These offsets are relative to the start of the commit message. */
 441        struct chunk author;
 442        struct chunk committer;
 443        struct chunk encoding;
 444        size_t message_off;
 445        size_t subject_off;
 446        size_t body_off;
 447
 448        /* The following ones are relative to the result struct strbuf. */
 449        struct chunk abbrev_commit_hash;
 450        struct chunk abbrev_tree_hash;
 451        struct chunk abbrev_parent_hashes;
 452};
 453
 454static int add_again(struct strbuf *sb, struct chunk *chunk)
 455{
 456        if (chunk->len) {
 457                strbuf_adddup(sb, chunk->off, chunk->len);
 458                return 1;
 459        }
 460
 461        /*
 462         * We haven't seen this chunk before.  Our caller is surely
 463         * going to add it the hard way now.  Remember the most likely
 464         * start of the to-be-added chunk: the current end of the
 465         * struct strbuf.
 466         */
 467        chunk->off = sb->len;
 468        return 0;
 469}
 470
 471static void parse_commit_header(struct format_commit_context *context)
 472{
 473        const char *msg = context->commit->buffer;
 474        int i;
 475
 476        for (i = 0; msg[i]; i++) {
 477                int eol;
 478                for (eol = i; msg[eol] && msg[eol] != '\n'; eol++)
 479                        ; /* do nothing */
 480
 481                if (i == eol) {
 482                        break;
 483                } else if (!prefixcmp(msg + i, "author ")) {
 484                        context->author.off = i + 7;
 485                        context->author.len = eol - i - 7;
 486                } else if (!prefixcmp(msg + i, "committer ")) {
 487                        context->committer.off = i + 10;
 488                        context->committer.len = eol - i - 10;
 489                } else if (!prefixcmp(msg + i, "encoding ")) {
 490                        context->encoding.off = i + 9;
 491                        context->encoding.len = eol - i - 9;
 492                }
 493                i = eol;
 494        }
 495        context->message_off = i;
 496        context->commit_header_parsed = 1;
 497}
 498
 499const char *format_subject(struct strbuf *sb, const char *msg,
 500                           const char *line_separator)
 501{
 502        int first = 1;
 503
 504        for (;;) {
 505                const char *line = msg;
 506                int linelen = get_one_line(line);
 507
 508                msg += linelen;
 509                if (!linelen || is_empty_line(line, &linelen))
 510                        break;
 511
 512                if (!sb)
 513                        continue;
 514                strbuf_grow(sb, linelen + 2);
 515                if (!first)
 516                        strbuf_addstr(sb, line_separator);
 517                strbuf_add(sb, line, linelen);
 518                first = 0;
 519        }
 520        return msg;
 521}
 522
 523static void parse_commit_message(struct format_commit_context *c)
 524{
 525        const char *msg = c->commit->buffer + c->message_off;
 526        const char *start = c->commit->buffer;
 527
 528        msg = skip_empty_lines(msg);
 529        c->subject_off = msg - start;
 530
 531        msg = format_subject(NULL, msg, NULL);
 532        msg = skip_empty_lines(msg);
 533        c->body_off = msg - start;
 534
 535        c->commit_message_parsed = 1;
 536}
 537
 538static void format_decoration(struct strbuf *sb, const struct commit *commit)
 539{
 540        struct name_decoration *d;
 541        const char *prefix = " (";
 542
 543        load_ref_decorations();
 544        d = lookup_decoration(&name_decoration, &commit->object);
 545        while (d) {
 546                strbuf_addstr(sb, prefix);
 547                prefix = ", ";
 548                strbuf_addstr(sb, d->name);
 549                d = d->next;
 550        }
 551        if (prefix[0] == ',')
 552                strbuf_addch(sb, ')');
 553}
 554
 555static size_t format_commit_item(struct strbuf *sb, const char *placeholder,
 556                               void *context)
 557{
 558        struct format_commit_context *c = context;
 559        const struct commit *commit = c->commit;
 560        const char *msg = commit->buffer;
 561        struct commit_list *p;
 562        int h1, h2;
 563
 564        /* these are independent of the commit */
 565        switch (placeholder[0]) {
 566        case 'C':
 567                if (placeholder[1] == '(') {
 568                        const char *end = strchr(placeholder + 2, ')');
 569                        char color[COLOR_MAXLEN];
 570                        if (!end)
 571                                return 0;
 572                        color_parse_mem(placeholder + 2,
 573                                        end - (placeholder + 2),
 574                                        "--pretty format", color);
 575                        strbuf_addstr(sb, color);
 576                        return end - placeholder + 1;
 577                }
 578                if (!prefixcmp(placeholder + 1, "red")) {
 579                        strbuf_addstr(sb, GIT_COLOR_RED);
 580                        return 4;
 581                } else if (!prefixcmp(placeholder + 1, "green")) {
 582                        strbuf_addstr(sb, GIT_COLOR_GREEN);
 583                        return 6;
 584                } else if (!prefixcmp(placeholder + 1, "blue")) {
 585                        strbuf_addstr(sb, GIT_COLOR_BLUE);
 586                        return 5;
 587                } else if (!prefixcmp(placeholder + 1, "reset")) {
 588                        strbuf_addstr(sb, GIT_COLOR_RESET);
 589                        return 6;
 590                } else
 591                        return 0;
 592        case 'n':               /* newline */
 593                strbuf_addch(sb, '\n');
 594                return 1;
 595        case 'x':
 596                /* %x00 == NUL, %x0a == LF, etc. */
 597                if (0 <= (h1 = hexval_table[0xff & placeholder[1]]) &&
 598                    h1 <= 16 &&
 599                    0 <= (h2 = hexval_table[0xff & placeholder[2]]) &&
 600                    h2 <= 16) {
 601                        strbuf_addch(sb, (h1<<4)|h2);
 602                        return 3;
 603                } else
 604                        return 0;
 605        }
 606
 607        /* these depend on the commit */
 608        if (!commit->object.parsed)
 609                parse_object(commit->object.sha1);
 610
 611        switch (placeholder[0]) {
 612        case 'H':               /* commit hash */
 613                strbuf_addstr(sb, sha1_to_hex(commit->object.sha1));
 614                return 1;
 615        case 'h':               /* abbreviated commit hash */
 616                if (add_again(sb, &c->abbrev_commit_hash))
 617                        return 1;
 618                strbuf_addstr(sb, find_unique_abbrev(commit->object.sha1,
 619                                                     DEFAULT_ABBREV));
 620                c->abbrev_commit_hash.len = sb->len - c->abbrev_commit_hash.off;
 621                return 1;
 622        case 'T':               /* tree hash */
 623                strbuf_addstr(sb, sha1_to_hex(commit->tree->object.sha1));
 624                return 1;
 625        case 't':               /* abbreviated tree hash */
 626                if (add_again(sb, &c->abbrev_tree_hash))
 627                        return 1;
 628                strbuf_addstr(sb, find_unique_abbrev(commit->tree->object.sha1,
 629                                                     DEFAULT_ABBREV));
 630                c->abbrev_tree_hash.len = sb->len - c->abbrev_tree_hash.off;
 631                return 1;
 632        case 'P':               /* parent hashes */
 633                for (p = commit->parents; p; p = p->next) {
 634                        if (p != commit->parents)
 635                                strbuf_addch(sb, ' ');
 636                        strbuf_addstr(sb, sha1_to_hex(p->item->object.sha1));
 637                }
 638                return 1;
 639        case 'p':               /* abbreviated parent hashes */
 640                if (add_again(sb, &c->abbrev_parent_hashes))
 641                        return 1;
 642                for (p = commit->parents; p; p = p->next) {
 643                        if (p != commit->parents)
 644                                strbuf_addch(sb, ' ');
 645                        strbuf_addstr(sb, find_unique_abbrev(
 646                                        p->item->object.sha1, DEFAULT_ABBREV));
 647                }
 648                c->abbrev_parent_hashes.len = sb->len -
 649                                              c->abbrev_parent_hashes.off;
 650                return 1;
 651        case 'm':               /* left/right/bottom */
 652                strbuf_addch(sb, (commit->object.flags & BOUNDARY)
 653                                 ? '-'
 654                                 : (commit->object.flags & SYMMETRIC_LEFT)
 655                                 ? '<'
 656                                 : '>');
 657                return 1;
 658        case 'd':
 659                format_decoration(sb, commit);
 660                return 1;
 661        }
 662
 663        /* For the rest we have to parse the commit header. */
 664        if (!c->commit_header_parsed)
 665                parse_commit_header(c);
 666
 667        switch (placeholder[0]) {
 668        case 'a':       /* author ... */
 669                return format_person_part(sb, placeholder[1],
 670                                   msg + c->author.off, c->author.len,
 671                                   c->dmode);
 672        case 'c':       /* committer ... */
 673                return format_person_part(sb, placeholder[1],
 674                                   msg + c->committer.off, c->committer.len,
 675                                   c->dmode);
 676        case 'e':       /* encoding */
 677                strbuf_add(sb, msg + c->encoding.off, c->encoding.len);
 678                return 1;
 679        }
 680
 681        /* Now we need to parse the commit message. */
 682        if (!c->commit_message_parsed)
 683                parse_commit_message(c);
 684
 685        switch (placeholder[0]) {
 686        case 's':       /* subject */
 687                format_subject(sb, msg + c->subject_off, " ");
 688                return 1;
 689        case 'b':       /* body */
 690                strbuf_addstr(sb, msg + c->body_off);
 691                return 1;
 692        }
 693        return 0;       /* unknown placeholder */
 694}
 695
 696void format_commit_message(const struct commit *commit,
 697                           const void *format, struct strbuf *sb,
 698                           enum date_mode dmode)
 699{
 700        struct format_commit_context context;
 701
 702        memset(&context, 0, sizeof(context));
 703        context.commit = commit;
 704        context.dmode = dmode;
 705        strbuf_expand(sb, format, format_commit_item, &context);
 706}
 707
 708static void pp_header(enum cmit_fmt fmt,
 709                      int abbrev,
 710                      enum date_mode dmode,
 711                      const char *encoding,
 712                      const struct commit *commit,
 713                      const char **msg_p,
 714                      struct strbuf *sb)
 715{
 716        int parents_shown = 0;
 717
 718        for (;;) {
 719                const char *line = *msg_p;
 720                int linelen = get_one_line(*msg_p);
 721
 722                if (!linelen)
 723                        return;
 724                *msg_p += linelen;
 725
 726                if (linelen == 1)
 727                        /* End of header */
 728                        return;
 729
 730                if (fmt == CMIT_FMT_RAW) {
 731                        strbuf_add(sb, line, linelen);
 732                        continue;
 733                }
 734
 735                if (!memcmp(line, "parent ", 7)) {
 736                        if (linelen != 48)
 737                                die("bad parent line in commit");
 738                        continue;
 739                }
 740
 741                if (!parents_shown) {
 742                        struct commit_list *parent;
 743                        int num;
 744                        for (parent = commit->parents, num = 0;
 745                             parent;
 746                             parent = parent->next, num++)
 747                                ;
 748                        /* with enough slop */
 749                        strbuf_grow(sb, num * 50 + 20);
 750                        add_merge_info(fmt, sb, commit, abbrev);
 751                        parents_shown = 1;
 752                }
 753
 754                /*
 755                 * MEDIUM == DEFAULT shows only author with dates.
 756                 * FULL shows both authors but not dates.
 757                 * FULLER shows both authors and dates.
 758                 */
 759                if (!memcmp(line, "author ", 7)) {
 760                        strbuf_grow(sb, linelen + 80);
 761                        pp_user_info("Author", fmt, sb, line + 7, dmode, encoding);
 762                }
 763                if (!memcmp(line, "committer ", 10) &&
 764                    (fmt == CMIT_FMT_FULL || fmt == CMIT_FMT_FULLER)) {
 765                        strbuf_grow(sb, linelen + 80);
 766                        pp_user_info("Commit", fmt, sb, line + 10, dmode, encoding);
 767                }
 768        }
 769}
 770
 771void pp_title_line(enum cmit_fmt fmt,
 772                   const char **msg_p,
 773                   struct strbuf *sb,
 774                   const char *subject,
 775                   const char *after_subject,
 776                   const char *encoding,
 777                   int need_8bit_cte)
 778{
 779        const char *line_separator = (fmt == CMIT_FMT_EMAIL) ? "\n " : " ";
 780        struct strbuf title;
 781
 782        strbuf_init(&title, 80);
 783        *msg_p = format_subject(&title, *msg_p, line_separator);
 784
 785        strbuf_grow(sb, title.len + 1024);
 786        if (subject) {
 787                strbuf_addstr(sb, subject);
 788                add_rfc2047(sb, title.buf, title.len, encoding);
 789        } else {
 790                strbuf_addbuf(sb, &title);
 791        }
 792        strbuf_addch(sb, '\n');
 793
 794        if (need_8bit_cte > 0) {
 795                const char *header_fmt =
 796                        "MIME-Version: 1.0\n"
 797                        "Content-Type: text/plain; charset=%s\n"
 798                        "Content-Transfer-Encoding: 8bit\n";
 799                strbuf_addf(sb, header_fmt, encoding);
 800        }
 801        if (after_subject) {
 802                strbuf_addstr(sb, after_subject);
 803        }
 804        if (fmt == CMIT_FMT_EMAIL) {
 805                strbuf_addch(sb, '\n');
 806        }
 807        strbuf_release(&title);
 808}
 809
 810void pp_remainder(enum cmit_fmt fmt,
 811                  const char **msg_p,
 812                  struct strbuf *sb,
 813                  int indent)
 814{
 815        int first = 1;
 816        for (;;) {
 817                const char *line = *msg_p;
 818                int linelen = get_one_line(line);
 819                *msg_p += linelen;
 820
 821                if (!linelen)
 822                        break;
 823
 824                if (is_empty_line(line, &linelen)) {
 825                        if (first)
 826                                continue;
 827                        if (fmt == CMIT_FMT_SHORT)
 828                                break;
 829                }
 830                first = 0;
 831
 832                strbuf_grow(sb, linelen + indent + 20);
 833                if (indent) {
 834                        memset(sb->buf + sb->len, ' ', indent);
 835                        strbuf_setlen(sb, sb->len + indent);
 836                }
 837                strbuf_add(sb, line, linelen);
 838                strbuf_addch(sb, '\n');
 839        }
 840}
 841
 842char *reencode_commit_message(const struct commit *commit, const char **encoding_p)
 843{
 844        const char *encoding;
 845
 846        encoding = (git_log_output_encoding
 847                    ? git_log_output_encoding
 848                    : git_commit_encoding);
 849        if (!encoding)
 850                encoding = "utf-8";
 851        if (encoding_p)
 852                *encoding_p = encoding;
 853        return logmsg_reencode(commit, encoding);
 854}
 855
 856void pretty_print_commit(enum cmit_fmt fmt, const struct commit *commit,
 857                         struct strbuf *sb, int abbrev,
 858                         const char *subject, const char *after_subject,
 859                         enum date_mode dmode, int need_8bit_cte)
 860{
 861        unsigned long beginning_of_body;
 862        int indent = 4;
 863        const char *msg = commit->buffer;
 864        char *reencoded;
 865        const char *encoding;
 866
 867        if (fmt == CMIT_FMT_USERFORMAT) {
 868                format_commit_message(commit, user_format, sb, dmode);
 869                return;
 870        }
 871
 872        reencoded = reencode_commit_message(commit, &encoding);
 873        if (reencoded) {
 874                msg = reencoded;
 875        }
 876
 877        if (fmt == CMIT_FMT_ONELINE || fmt == CMIT_FMT_EMAIL)
 878                indent = 0;
 879
 880        /*
 881         * We need to check and emit Content-type: to mark it
 882         * as 8-bit if we haven't done so.
 883         */
 884        if (fmt == CMIT_FMT_EMAIL && need_8bit_cte == 0) {
 885                int i, ch, in_body;
 886
 887                for (in_body = i = 0; (ch = msg[i]); i++) {
 888                        if (!in_body) {
 889                                /* author could be non 7-bit ASCII but
 890                                 * the log may be so; skip over the
 891                                 * header part first.
 892                                 */
 893                                if (ch == '\n' && msg[i+1] == '\n')
 894                                        in_body = 1;
 895                        }
 896                        else if (non_ascii(ch)) {
 897                                need_8bit_cte = 1;
 898                                break;
 899                        }
 900                }
 901        }
 902
 903        pp_header(fmt, abbrev, dmode, encoding, commit, &msg, sb);
 904        if (fmt != CMIT_FMT_ONELINE && !subject) {
 905                strbuf_addch(sb, '\n');
 906        }
 907
 908        /* Skip excess blank lines at the beginning of body, if any... */
 909        msg = skip_empty_lines(msg);
 910
 911        /* These formats treat the title line specially. */
 912        if (fmt == CMIT_FMT_ONELINE || fmt == CMIT_FMT_EMAIL)
 913                pp_title_line(fmt, &msg, sb, subject,
 914                              after_subject, encoding, need_8bit_cte);
 915
 916        beginning_of_body = sb->len;
 917        if (fmt != CMIT_FMT_ONELINE)
 918                pp_remainder(fmt, &msg, sb, indent);
 919        strbuf_rtrim(sb);
 920
 921        /* Make sure there is an EOLN for the non-oneline case */
 922        if (fmt != CMIT_FMT_ONELINE)
 923                strbuf_addch(sb, '\n');
 924
 925        /*
 926         * The caller may append additional body text in e-mail
 927         * format.  Make sure we did not strip the blank line
 928         * between the header and the body.
 929         */
 930        if (fmt == CMIT_FMT_EMAIL && sb->len <= beginning_of_body)
 931                strbuf_addch(sb, '\n');
 932        free(reencoded);
 933}