Andrew's git / gitweb.git / pretty.c
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pretty.con commit status: show the branch name if possible in in-progress info (0722c80)
   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 "notes.h"
  10#include "color.h"
  11#include "reflog-walk.h"
  12#include "gpg-interface.h"
  13
  14static char *user_format;
  15static struct cmt_fmt_map {
  16        const char *name;
  17        enum cmit_fmt format;
  18        int is_tformat;
  19        int is_alias;
  20        const char *user_format;
  21} *commit_formats;
  22static size_t builtin_formats_len;
  23static size_t commit_formats_len;
  24static size_t commit_formats_alloc;
  25static struct cmt_fmt_map *find_commit_format(const char *sought);
  26
  27static void save_user_format(struct rev_info *rev, const char *cp, int is_tformat)
  28{
  29        free(user_format);
  30        user_format = xstrdup(cp);
  31        if (is_tformat)
  32                rev->use_terminator = 1;
  33        rev->commit_format = CMIT_FMT_USERFORMAT;
  34}
  35
  36static int git_pretty_formats_config(const char *var, const char *value, void *cb)
  37{
  38        struct cmt_fmt_map *commit_format = NULL;
  39        const char *name;
  40        const char *fmt;
  41        int i;
  42
  43        if (prefixcmp(var, "pretty."))
  44                return 0;
  45
  46        name = var + strlen("pretty.");
  47        for (i = 0; i < builtin_formats_len; i++) {
  48                if (!strcmp(commit_formats[i].name, name))
  49                        return 0;
  50        }
  51
  52        for (i = builtin_formats_len; i < commit_formats_len; i++) {
  53                if (!strcmp(commit_formats[i].name, name)) {
  54                        commit_format = &commit_formats[i];
  55                        break;
  56                }
  57        }
  58
  59        if (!commit_format) {
  60                ALLOC_GROW(commit_formats, commit_formats_len+1,
  61                           commit_formats_alloc);
  62                commit_format = &commit_formats[commit_formats_len];
  63                memset(commit_format, 0, sizeof(*commit_format));
  64                commit_formats_len++;
  65        }
  66
  67        commit_format->name = xstrdup(name);
  68        commit_format->format = CMIT_FMT_USERFORMAT;
  69        git_config_string(&fmt, var, value);
  70        if (!prefixcmp(fmt, "format:") || !prefixcmp(fmt, "tformat:")) {
  71                commit_format->is_tformat = fmt[0] == 't';
  72                fmt = strchr(fmt, ':') + 1;
  73        } else if (strchr(fmt, '%'))
  74                commit_format->is_tformat = 1;
  75        else
  76                commit_format->is_alias = 1;
  77        commit_format->user_format = fmt;
  78
  79        return 0;
  80}
  81
  82static void setup_commit_formats(void)
  83{
  84        struct cmt_fmt_map builtin_formats[] = {
  85                { "raw",        CMIT_FMT_RAW,           0 },
  86                { "medium",     CMIT_FMT_MEDIUM,        0 },
  87                { "short",      CMIT_FMT_SHORT,         0 },
  88                { "email",      CMIT_FMT_EMAIL,         0 },
  89                { "fuller",     CMIT_FMT_FULLER,        0 },
  90                { "full",       CMIT_FMT_FULL,          0 },
  91                { "oneline",    CMIT_FMT_ONELINE,       1 }
  92        };
  93        commit_formats_len = ARRAY_SIZE(builtin_formats);
  94        builtin_formats_len = commit_formats_len;
  95        ALLOC_GROW(commit_formats, commit_formats_len, commit_formats_alloc);
  96        memcpy(commit_formats, builtin_formats,
  97               sizeof(*builtin_formats)*ARRAY_SIZE(builtin_formats));
  98
  99        git_config(git_pretty_formats_config, NULL);
 100}
 101
 102static struct cmt_fmt_map *find_commit_format_recursive(const char *sought,
 103                                                        const char *original,
 104                                                        int num_redirections)
 105{
 106        struct cmt_fmt_map *found = NULL;
 107        size_t found_match_len = 0;
 108        int i;
 109
 110        if (num_redirections >= commit_formats_len)
 111                die("invalid --pretty format: "
 112                    "'%s' references an alias which points to itself",
 113                    original);
 114
 115        for (i = 0; i < commit_formats_len; i++) {
 116                size_t match_len;
 117
 118                if (prefixcmp(commit_formats[i].name, sought))
 119                        continue;
 120
 121                match_len = strlen(commit_formats[i].name);
 122                if (found == NULL || found_match_len > match_len) {
 123                        found = &commit_formats[i];
 124                        found_match_len = match_len;
 125                }
 126        }
 127
 128        if (found && found->is_alias) {
 129                found = find_commit_format_recursive(found->user_format,
 130                                                     original,
 131                                                     num_redirections+1);
 132        }
 133
 134        return found;
 135}
 136
 137static struct cmt_fmt_map *find_commit_format(const char *sought)
 138{
 139        if (!commit_formats)
 140                setup_commit_formats();
 141
 142        return find_commit_format_recursive(sought, sought, 0);
 143}
 144
 145void get_commit_format(const char *arg, struct rev_info *rev)
 146{
 147        struct cmt_fmt_map *commit_format;
 148
 149        rev->use_terminator = 0;
 150        if (!arg || !*arg) {
 151                rev->commit_format = CMIT_FMT_DEFAULT;
 152                return;
 153        }
 154        if (!prefixcmp(arg, "format:") || !prefixcmp(arg, "tformat:")) {
 155                save_user_format(rev, strchr(arg, ':') + 1, arg[0] == 't');
 156                return;
 157        }
 158
 159        if (strchr(arg, '%')) {
 160                save_user_format(rev, arg, 1);
 161                return;
 162        }
 163
 164        commit_format = find_commit_format(arg);
 165        if (!commit_format)
 166                die("invalid --pretty format: %s", arg);
 167
 168        rev->commit_format = commit_format->format;
 169        rev->use_terminator = commit_format->is_tformat;
 170        if (commit_format->format == CMIT_FMT_USERFORMAT) {
 171                save_user_format(rev, commit_format->user_format,
 172                                 commit_format->is_tformat);
 173        }
 174}
 175
 176/*
 177 * Generic support for pretty-printing the header
 178 */
 179static int get_one_line(const char *msg)
 180{
 181        int ret = 0;
 182
 183        for (;;) {
 184                char c = *msg++;
 185                if (!c)
 186                        break;
 187                ret++;
 188                if (c == '\n')
 189                        break;
 190        }
 191        return ret;
 192}
 193
 194/* High bit set, or ISO-2022-INT */
 195static int non_ascii(int ch)
 196{
 197        return !isascii(ch) || ch == '\033';
 198}
 199
 200int has_non_ascii(const char *s)
 201{
 202        int ch;
 203        if (!s)
 204                return 0;
 205        while ((ch = *s++) != '\0') {
 206                if (non_ascii(ch))
 207                        return 1;
 208        }
 209        return 0;
 210}
 211
 212static int is_rfc822_special(char ch)
 213{
 214        switch (ch) {
 215        case '(':
 216        case ')':
 217        case '<':
 218        case '>':
 219        case '[':
 220        case ']':
 221        case ':':
 222        case ';':
 223        case '@':
 224        case ',':
 225        case '.':
 226        case '"':
 227        case '\\':
 228                return 1;
 229        default:
 230                return 0;
 231        }
 232}
 233
 234static int needs_rfc822_quoting(const char *s, int len)
 235{
 236        int i;
 237        for (i = 0; i < len; i++)
 238                if (is_rfc822_special(s[i]))
 239                        return 1;
 240        return 0;
 241}
 242
 243static int last_line_length(struct strbuf *sb)
 244{
 245        int i;
 246
 247        /* How many bytes are already used on the last line? */
 248        for (i = sb->len - 1; i >= 0; i--)
 249                if (sb->buf[i] == '\n')
 250                        break;
 251        return sb->len - (i + 1);
 252}
 253
 254static void add_rfc822_quoted(struct strbuf *out, const char *s, int len)
 255{
 256        int i;
 257
 258        /* just a guess, we may have to also backslash-quote */
 259        strbuf_grow(out, len + 2);
 260
 261        strbuf_addch(out, '"');
 262        for (i = 0; i < len; i++) {
 263                switch (s[i]) {
 264                case '"':
 265                case '\\':
 266                        strbuf_addch(out, '\\');
 267                        /* fall through */
 268                default:
 269                        strbuf_addch(out, s[i]);
 270                }
 271        }
 272        strbuf_addch(out, '"');
 273}
 274
 275enum rfc2047_type {
 276        RFC2047_SUBJECT,
 277        RFC2047_ADDRESS,
 278};
 279
 280static int is_rfc2047_special(char ch, enum rfc2047_type type)
 281{
 282        /*
 283         * rfc2047, section 4.2:
 284         *
 285         *    8-bit values which correspond to printable ASCII characters other
 286         *    than "=", "?", and "_" (underscore), MAY be represented as those
 287         *    characters.  (But see section 5 for restrictions.)  In
 288         *    particular, SPACE and TAB MUST NOT be represented as themselves
 289         *    within encoded words.
 290         */
 291
 292        /*
 293         * rule out non-ASCII characters and non-printable characters (the
 294         * non-ASCII check should be redundant as isprint() is not localized
 295         * and only knows about ASCII, but be defensive about that)
 296         */
 297        if (non_ascii(ch) || !isprint(ch))
 298                return 1;
 299
 300        /*
 301         * rule out special printable characters (' ' should be the only
 302         * whitespace character considered printable, but be defensive and use
 303         * isspace())
 304         */
 305        if (isspace(ch) || ch == '=' || ch == '?' || ch == '_')
 306                return 1;
 307
 308        /*
 309         * rfc2047, section 5.3:
 310         *
 311         *    As a replacement for a 'word' entity within a 'phrase', for example,
 312         *    one that precedes an address in a From, To, or Cc header.  The ABNF
 313         *    definition for 'phrase' from RFC 822 thus becomes:
 314         *
 315         *    phrase = 1*( encoded-word / word )
 316         *
 317         *    In this case the set of characters that may be used in a "Q"-encoded
 318         *    'encoded-word' is restricted to: <upper and lower case ASCII
 319         *    letters, decimal digits, "!", "*", "+", "-", "/", "=", and "_"
 320         *    (underscore, ASCII 95.)>.  An 'encoded-word' that appears within a
 321         *    'phrase' MUST be separated from any adjacent 'word', 'text' or
 322         *    'special' by 'linear-white-space'.
 323         */
 324
 325        if (type != RFC2047_ADDRESS)
 326                return 0;
 327
 328        /* '=' and '_' are special cases and have been checked above */
 329        return !(isalnum(ch) || ch == '!' || ch == '*' || ch == '+' || ch == '-' || ch == '/');
 330}
 331
 332static int needs_rfc2047_encoding(const char *line, int len,
 333                                  enum rfc2047_type type)
 334{
 335        int i;
 336
 337        for (i = 0; i < len; i++) {
 338                int ch = line[i];
 339                if (non_ascii(ch) || ch == '\n')
 340                        return 1;
 341                if ((i + 1 < len) && (ch == '=' && line[i+1] == '?'))
 342                        return 1;
 343        }
 344
 345        return 0;
 346}
 347
 348static void add_rfc2047(struct strbuf *sb, const char *line, int len,
 349                       const char *encoding, enum rfc2047_type type)
 350{
 351        static const int max_encoded_length = 76; /* per rfc2047 */
 352        int i;
 353        int line_len = last_line_length(sb);
 354
 355        strbuf_grow(sb, len * 3 + strlen(encoding) + 100);
 356        strbuf_addf(sb, "=?%s?q?", encoding);
 357        line_len += strlen(encoding) + 5; /* 5 for =??q? */
 358        for (i = 0; i < len; i++) {
 359                unsigned ch = line[i] & 0xFF;
 360                int is_special = is_rfc2047_special(ch, type);
 361
 362                /*
 363                 * According to RFC 2047, we could encode the special character
 364                 * ' ' (space) with '_' (underscore) for readability. But many
 365                 * programs do not understand this and just leave the
 366                 * underscore in place. Thus, we do nothing special here, which
 367                 * causes ' ' to be encoded as '=20', avoiding this problem.
 368                 */
 369
 370                if (line_len + 2 + (is_special ? 3 : 1) > max_encoded_length) {
 371                        strbuf_addf(sb, "?=\n =?%s?q?", encoding);
 372                        line_len = strlen(encoding) + 5 + 1; /* =??q? plus SP */
 373                }
 374
 375                if (is_special) {
 376                        strbuf_addf(sb, "=%02X", ch);
 377                        line_len += 3;
 378                } else {
 379                        strbuf_addch(sb, ch);
 380                        line_len++;
 381                }
 382        }
 383        strbuf_addstr(sb, "?=");
 384}
 385
 386void pp_user_info(const struct pretty_print_context *pp,
 387                  const char *what, struct strbuf *sb,
 388                  const char *line, const char *encoding)
 389{
 390        struct strbuf name;
 391        struct strbuf mail;
 392        struct ident_split ident;
 393        int linelen;
 394        char *line_end, *date;
 395        const char *mailbuf, *namebuf;
 396        size_t namelen, maillen;
 397        int max_length = 78; /* per rfc2822 */
 398        unsigned long time;
 399        int tz;
 400
 401        if (pp->fmt == CMIT_FMT_ONELINE)
 402                return;
 403
 404        line_end = strchr(line, '\n');
 405        if (!line_end) {
 406                line_end = strchr(line, '\0');
 407                if (!line_end)
 408                        return;
 409        }
 410
 411        linelen = ++line_end - line;
 412        if (split_ident_line(&ident, line, linelen))
 413                return;
 414
 415
 416        mailbuf = ident.mail_begin;
 417        maillen = ident.mail_end - ident.mail_begin;
 418        namebuf = ident.name_begin;
 419        namelen = ident.name_end - ident.name_begin;
 420
 421        if (pp->mailmap)
 422                map_user(pp->mailmap, &mailbuf, &maillen, &namebuf, &namelen);
 423
 424        strbuf_init(&mail, 0);
 425        strbuf_init(&name, 0);
 426
 427        strbuf_add(&mail, mailbuf, maillen);
 428        strbuf_add(&name, namebuf, namelen);
 429
 430        namelen = name.len + mail.len + 3; /* ' ' + '<' + '>' */
 431        time = strtoul(ident.date_begin, &date, 10);
 432        tz = strtol(date, NULL, 10);
 433
 434        if (pp->fmt == CMIT_FMT_EMAIL) {
 435                strbuf_addstr(sb, "From: ");
 436                if (needs_rfc2047_encoding(name.buf, name.len, RFC2047_ADDRESS)) {
 437                        add_rfc2047(sb, name.buf, name.len,
 438                                    encoding, RFC2047_ADDRESS);
 439                        max_length = 76; /* per rfc2047 */
 440                } else if (needs_rfc822_quoting(name.buf, name.len)) {
 441                        struct strbuf quoted = STRBUF_INIT;
 442                        add_rfc822_quoted(&quoted, name.buf, name.len);
 443                        strbuf_add_wrapped_bytes(sb, quoted.buf, quoted.len,
 444                                                        -6, 1, max_length);
 445                        strbuf_release(&quoted);
 446                } else {
 447                        strbuf_add_wrapped_bytes(sb, name.buf, name.len,
 448                                                 -6, 1, max_length);
 449                }
 450                if (namelen - name.len + last_line_length(sb) > max_length)
 451                        strbuf_addch(sb, '\n');
 452
 453                strbuf_addf(sb, " <%s>\n", mail.buf);
 454        } else {
 455                strbuf_addf(sb, "%s: %.*s%s <%s>\n", what,
 456                              (pp->fmt == CMIT_FMT_FULLER) ? 4 : 0,
 457                              "    ", name.buf, mail.buf);
 458        }
 459
 460        strbuf_release(&mail);
 461        strbuf_release(&name);
 462
 463        switch (pp->fmt) {
 464        case CMIT_FMT_MEDIUM:
 465                strbuf_addf(sb, "Date:   %s\n", show_date(time, tz, pp->date_mode));
 466                break;
 467        case CMIT_FMT_EMAIL:
 468                strbuf_addf(sb, "Date: %s\n", show_date(time, tz, DATE_RFC2822));
 469                break;
 470        case CMIT_FMT_FULLER:
 471                strbuf_addf(sb, "%sDate: %s\n", what, show_date(time, tz, pp->date_mode));
 472                break;
 473        default:
 474                /* notin' */
 475                break;
 476        }
 477}
 478
 479static int is_empty_line(const char *line, int *len_p)
 480{
 481        int len = *len_p;
 482        while (len && isspace(line[len-1]))
 483                len--;
 484        *len_p = len;
 485        return !len;
 486}
 487
 488static const char *skip_empty_lines(const char *msg)
 489{
 490        for (;;) {
 491                int linelen = get_one_line(msg);
 492                int ll = linelen;
 493                if (!linelen)
 494                        break;
 495                if (!is_empty_line(msg, &ll))
 496                        break;
 497                msg += linelen;
 498        }
 499        return msg;
 500}
 501
 502static void add_merge_info(const struct pretty_print_context *pp,
 503                           struct strbuf *sb, const struct commit *commit)
 504{
 505        struct commit_list *parent = commit->parents;
 506
 507        if ((pp->fmt == CMIT_FMT_ONELINE) || (pp->fmt == CMIT_FMT_EMAIL) ||
 508            !parent || !parent->next)
 509                return;
 510
 511        strbuf_addstr(sb, "Merge:");
 512
 513        while (parent) {
 514                struct commit *p = parent->item;
 515                const char *hex = NULL;
 516                if (pp->abbrev)
 517                        hex = find_unique_abbrev(p->object.sha1, pp->abbrev);
 518                if (!hex)
 519                        hex = sha1_to_hex(p->object.sha1);
 520                parent = parent->next;
 521
 522                strbuf_addf(sb, " %s", hex);
 523        }
 524        strbuf_addch(sb, '\n');
 525}
 526
 527static char *get_header(const struct commit *commit, const char *key)
 528{
 529        int key_len = strlen(key);
 530        const char *line = commit->buffer;
 531
 532        while (line) {
 533                const char *eol = strchr(line, '\n'), *next;
 534
 535                if (line == eol)
 536                        return NULL;
 537                if (!eol) {
 538                        warning("malformed commit (header is missing newline): %s",
 539                                sha1_to_hex(commit->object.sha1));
 540                        eol = line + strlen(line);
 541                        next = NULL;
 542                } else
 543                        next = eol + 1;
 544                if (eol - line > key_len &&
 545                    !strncmp(line, key, key_len) &&
 546                    line[key_len] == ' ') {
 547                        return xmemdupz(line + key_len + 1, eol - line - key_len - 1);
 548                }
 549                line = next;
 550        }
 551        return NULL;
 552}
 553
 554static char *replace_encoding_header(char *buf, const char *encoding)
 555{
 556        struct strbuf tmp = STRBUF_INIT;
 557        size_t start, len;
 558        char *cp = buf;
 559
 560        /* guess if there is an encoding header before a \n\n */
 561        while (strncmp(cp, "encoding ", strlen("encoding "))) {
 562                cp = strchr(cp, '\n');
 563                if (!cp || *++cp == '\n')
 564                        return buf;
 565        }
 566        start = cp - buf;
 567        cp = strchr(cp, '\n');
 568        if (!cp)
 569                return buf; /* should not happen but be defensive */
 570        len = cp + 1 - (buf + start);
 571
 572        strbuf_attach(&tmp, buf, strlen(buf), strlen(buf) + 1);
 573        if (is_encoding_utf8(encoding)) {
 574                /* we have re-coded to UTF-8; drop the header */
 575                strbuf_remove(&tmp, start, len);
 576        } else {
 577                /* just replaces XXXX in 'encoding XXXX\n' */
 578                strbuf_splice(&tmp, start + strlen("encoding "),
 579                                          len - strlen("encoding \n"),
 580                                          encoding, strlen(encoding));
 581        }
 582        return strbuf_detach(&tmp, NULL);
 583}
 584
 585char *logmsg_reencode(const struct commit *commit,
 586                      const char *output_encoding)
 587{
 588        static const char *utf8 = "UTF-8";
 589        const char *use_encoding;
 590        char *encoding;
 591        char *out;
 592
 593        if (!output_encoding || !*output_encoding)
 594                return NULL;
 595        encoding = get_header(commit, "encoding");
 596        use_encoding = encoding ? encoding : utf8;
 597        if (same_encoding(use_encoding, output_encoding))
 598                if (encoding) /* we'll strip encoding header later */
 599                        out = xstrdup(commit->buffer);
 600                else
 601                        return NULL; /* nothing to do */
 602        else
 603                out = reencode_string(commit->buffer,
 604                                      output_encoding, use_encoding);
 605        if (out)
 606                out = replace_encoding_header(out, output_encoding);
 607
 608        free(encoding);
 609        return out;
 610}
 611
 612static int mailmap_name(const char **email, size_t *email_len,
 613                        const char **name, size_t *name_len)
 614{
 615        static struct string_list *mail_map;
 616        if (!mail_map) {
 617                mail_map = xcalloc(1, sizeof(*mail_map));
 618                read_mailmap(mail_map, NULL);
 619        }
 620        return mail_map->nr && map_user(mail_map, email, email_len, name, name_len);
 621}
 622
 623static size_t format_person_part(struct strbuf *sb, char part,
 624                                 const char *msg, int len, enum date_mode dmode)
 625{
 626        /* currently all placeholders have same length */
 627        const int placeholder_len = 2;
 628        int tz;
 629        unsigned long date = 0;
 630        struct ident_split s;
 631        const char *name, *mail;
 632        size_t maillen, namelen;
 633
 634        if (split_ident_line(&s, msg, len) < 0)
 635                goto skip;
 636
 637        name = s.name_begin;
 638        namelen = s.name_end - s.name_begin;
 639        mail = s.mail_begin;
 640        maillen = s.mail_end - s.mail_begin;
 641
 642        if (part == 'N' || part == 'E') /* mailmap lookup */
 643                mailmap_name(&mail, &maillen, &name, &namelen);
 644        if (part == 'n' || part == 'N') {       /* name */
 645                strbuf_add(sb, name, namelen);
 646                return placeholder_len;
 647        }
 648        if (part == 'e' || part == 'E') {       /* email */
 649                strbuf_add(sb, mail, maillen);
 650                return placeholder_len;
 651        }
 652
 653        if (!s.date_begin)
 654                goto skip;
 655
 656        date = strtoul(s.date_begin, NULL, 10);
 657
 658        if (part == 't') {      /* date, UNIX timestamp */
 659                strbuf_add(sb, s.date_begin, s.date_end - s.date_begin);
 660                return placeholder_len;
 661        }
 662
 663        /* parse tz */
 664        tz = strtoul(s.tz_begin + 1, NULL, 10);
 665        if (*s.tz_begin == '-')
 666                tz = -tz;
 667
 668        switch (part) {
 669        case 'd':       /* date */
 670                strbuf_addstr(sb, show_date(date, tz, dmode));
 671                return placeholder_len;
 672        case 'D':       /* date, RFC2822 style */
 673                strbuf_addstr(sb, show_date(date, tz, DATE_RFC2822));
 674                return placeholder_len;
 675        case 'r':       /* date, relative */
 676                strbuf_addstr(sb, show_date(date, tz, DATE_RELATIVE));
 677                return placeholder_len;
 678        case 'i':       /* date, ISO 8601 */
 679                strbuf_addstr(sb, show_date(date, tz, DATE_ISO8601));
 680                return placeholder_len;
 681        }
 682
 683skip:
 684        /*
 685         * reading from either a bogus commit, or a reflog entry with
 686         * %gn, %ge, etc.; 'sb' cannot be updated, but we still need
 687         * to compute a valid return value.
 688         */
 689        if (part == 'n' || part == 'e' || part == 't' || part == 'd'
 690            || part == 'D' || part == 'r' || part == 'i')
 691                return placeholder_len;
 692
 693        return 0; /* unknown placeholder */
 694}
 695
 696struct chunk {
 697        size_t off;
 698        size_t len;
 699};
 700
 701struct format_commit_context {
 702        const struct commit *commit;
 703        const struct pretty_print_context *pretty_ctx;
 704        unsigned commit_header_parsed:1;
 705        unsigned commit_message_parsed:1;
 706        unsigned commit_signature_parsed:1;
 707        struct {
 708                char *gpg_output;
 709                char good_bad;
 710                char *signer;
 711        } signature;
 712        char *message;
 713        size_t width, indent1, indent2;
 714
 715        /* These offsets are relative to the start of the commit message. */
 716        struct chunk author;
 717        struct chunk committer;
 718        struct chunk encoding;
 719        size_t message_off;
 720        size_t subject_off;
 721        size_t body_off;
 722
 723        /* The following ones are relative to the result struct strbuf. */
 724        struct chunk abbrev_commit_hash;
 725        struct chunk abbrev_tree_hash;
 726        struct chunk abbrev_parent_hashes;
 727        size_t wrap_start;
 728};
 729
 730static int add_again(struct strbuf *sb, struct chunk *chunk)
 731{
 732        if (chunk->len) {
 733                strbuf_adddup(sb, chunk->off, chunk->len);
 734                return 1;
 735        }
 736
 737        /*
 738         * We haven't seen this chunk before.  Our caller is surely
 739         * going to add it the hard way now.  Remember the most likely
 740         * start of the to-be-added chunk: the current end of the
 741         * struct strbuf.
 742         */
 743        chunk->off = sb->len;
 744        return 0;
 745}
 746
 747static void parse_commit_header(struct format_commit_context *context)
 748{
 749        const char *msg = context->message;
 750        int i;
 751
 752        for (i = 0; msg[i]; i++) {
 753                int eol;
 754                for (eol = i; msg[eol] && msg[eol] != '\n'; eol++)
 755                        ; /* do nothing */
 756
 757                if (i == eol) {
 758                        break;
 759                } else if (!prefixcmp(msg + i, "author ")) {
 760                        context->author.off = i + 7;
 761                        context->author.len = eol - i - 7;
 762                } else if (!prefixcmp(msg + i, "committer ")) {
 763                        context->committer.off = i + 10;
 764                        context->committer.len = eol - i - 10;
 765                } else if (!prefixcmp(msg + i, "encoding ")) {
 766                        context->encoding.off = i + 9;
 767                        context->encoding.len = eol - i - 9;
 768                }
 769                i = eol;
 770        }
 771        context->message_off = i;
 772        context->commit_header_parsed = 1;
 773}
 774
 775static int istitlechar(char c)
 776{
 777        return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') ||
 778                (c >= '0' && c <= '9') || c == '.' || c == '_';
 779}
 780
 781static void format_sanitized_subject(struct strbuf *sb, const char *msg)
 782{
 783        size_t trimlen;
 784        size_t start_len = sb->len;
 785        int space = 2;
 786
 787        for (; *msg && *msg != '\n'; msg++) {
 788                if (istitlechar(*msg)) {
 789                        if (space == 1)
 790                                strbuf_addch(sb, '-');
 791                        space = 0;
 792                        strbuf_addch(sb, *msg);
 793                        if (*msg == '.')
 794                                while (*(msg+1) == '.')
 795                                        msg++;
 796                } else
 797                        space |= 1;
 798        }
 799
 800        /* trim any trailing '.' or '-' characters */
 801        trimlen = 0;
 802        while (sb->len - trimlen > start_len &&
 803                (sb->buf[sb->len - 1 - trimlen] == '.'
 804                || sb->buf[sb->len - 1 - trimlen] == '-'))
 805                trimlen++;
 806        strbuf_remove(sb, sb->len - trimlen, trimlen);
 807}
 808
 809const char *format_subject(struct strbuf *sb, const char *msg,
 810                           const char *line_separator)
 811{
 812        int first = 1;
 813
 814        for (;;) {
 815                const char *line = msg;
 816                int linelen = get_one_line(line);
 817
 818                msg += linelen;
 819                if (!linelen || is_empty_line(line, &linelen))
 820                        break;
 821
 822                if (!sb)
 823                        continue;
 824                strbuf_grow(sb, linelen + 2);
 825                if (!first)
 826                        strbuf_addstr(sb, line_separator);
 827                strbuf_add(sb, line, linelen);
 828                first = 0;
 829        }
 830        return msg;
 831}
 832
 833static void parse_commit_message(struct format_commit_context *c)
 834{
 835        const char *msg = c->message + c->message_off;
 836        const char *start = c->message;
 837
 838        msg = skip_empty_lines(msg);
 839        c->subject_off = msg - start;
 840
 841        msg = format_subject(NULL, msg, NULL);
 842        msg = skip_empty_lines(msg);
 843        c->body_off = msg - start;
 844
 845        c->commit_message_parsed = 1;
 846}
 847
 848static void format_decoration(struct strbuf *sb, const struct commit *commit)
 849{
 850        struct name_decoration *d;
 851        const char *prefix = " (";
 852
 853        load_ref_decorations(DECORATE_SHORT_REFS);
 854        d = lookup_decoration(&name_decoration, &commit->object);
 855        while (d) {
 856                strbuf_addstr(sb, prefix);
 857                prefix = ", ";
 858                strbuf_addstr(sb, d->name);
 859                d = d->next;
 860        }
 861        if (prefix[0] == ',')
 862                strbuf_addch(sb, ')');
 863}
 864
 865static void strbuf_wrap(struct strbuf *sb, size_t pos,
 866                        size_t width, size_t indent1, size_t indent2)
 867{
 868        struct strbuf tmp = STRBUF_INIT;
 869
 870        if (pos)
 871                strbuf_add(&tmp, sb->buf, pos);
 872        strbuf_add_wrapped_text(&tmp, sb->buf + pos,
 873                                (int) indent1, (int) indent2, (int) width);
 874        strbuf_swap(&tmp, sb);
 875        strbuf_release(&tmp);
 876}
 877
 878static void rewrap_message_tail(struct strbuf *sb,
 879                                struct format_commit_context *c,
 880                                size_t new_width, size_t new_indent1,
 881                                size_t new_indent2)
 882{
 883        if (c->width == new_width && c->indent1 == new_indent1 &&
 884            c->indent2 == new_indent2)
 885                return;
 886        if (c->wrap_start < sb->len)
 887                strbuf_wrap(sb, c->wrap_start, c->width, c->indent1, c->indent2);
 888        c->wrap_start = sb->len;
 889        c->width = new_width;
 890        c->indent1 = new_indent1;
 891        c->indent2 = new_indent2;
 892}
 893
 894static struct {
 895        char result;
 896        const char *check;
 897} signature_check[] = {
 898        { 'G', ": Good signature from " },
 899        { 'B', ": BAD signature from " },
 900};
 901
 902static void parse_signature_lines(struct format_commit_context *ctx)
 903{
 904        const char *buf = ctx->signature.gpg_output;
 905        int i;
 906
 907        for (i = 0; i < ARRAY_SIZE(signature_check); i++) {
 908                const char *found = strstr(buf, signature_check[i].check);
 909                const char *next;
 910                if (!found)
 911                        continue;
 912                ctx->signature.good_bad = signature_check[i].result;
 913                found += strlen(signature_check[i].check);
 914                next = strchrnul(found, '\n');
 915                ctx->signature.signer = xmemdupz(found, next - found);
 916                break;
 917        }
 918}
 919
 920static void parse_commit_signature(struct format_commit_context *ctx)
 921{
 922        struct strbuf payload = STRBUF_INIT;
 923        struct strbuf signature = STRBUF_INIT;
 924        struct strbuf gpg_output = STRBUF_INIT;
 925        int status;
 926
 927        ctx->commit_signature_parsed = 1;
 928
 929        if (parse_signed_commit(ctx->commit->object.sha1,
 930                                &payload, &signature) <= 0)
 931                goto out;
 932        status = verify_signed_buffer(payload.buf, payload.len,
 933                                      signature.buf, signature.len,
 934                                      &gpg_output);
 935        if (status && !gpg_output.len)
 936                goto out;
 937        ctx->signature.gpg_output = strbuf_detach(&gpg_output, NULL);
 938        parse_signature_lines(ctx);
 939
 940 out:
 941        strbuf_release(&gpg_output);
 942        strbuf_release(&payload);
 943        strbuf_release(&signature);
 944}
 945
 946
 947static int format_reflog_person(struct strbuf *sb,
 948                                char part,
 949                                struct reflog_walk_info *log,
 950                                enum date_mode dmode)
 951{
 952        const char *ident;
 953
 954        if (!log)
 955                return 2;
 956
 957        ident = get_reflog_ident(log);
 958        if (!ident)
 959                return 2;
 960
 961        return format_person_part(sb, part, ident, strlen(ident), dmode);
 962}
 963
 964static size_t format_commit_one(struct strbuf *sb, const char *placeholder,
 965                                void *context)
 966{
 967        struct format_commit_context *c = context;
 968        const struct commit *commit = c->commit;
 969        const char *msg = c->message;
 970        struct commit_list *p;
 971        int h1, h2;
 972
 973        /* these are independent of the commit */
 974        switch (placeholder[0]) {
 975        case 'C':
 976                if (placeholder[1] == '(') {
 977                        const char *begin = placeholder + 2;
 978                        const char *end = strchr(begin, ')');
 979                        char color[COLOR_MAXLEN];
 980
 981                        if (!end)
 982                                return 0;
 983                        if (!prefixcmp(begin, "auto,")) {
 984                                if (!want_color(c->pretty_ctx->color))
 985                                        return end - placeholder + 1;
 986                                begin += 5;
 987                        }
 988                        color_parse_mem(begin,
 989                                        end - begin,
 990                                        "--pretty format", color);
 991                        strbuf_addstr(sb, color);
 992                        return end - placeholder + 1;
 993                }
 994                if (!prefixcmp(placeholder + 1, "red")) {
 995                        strbuf_addstr(sb, GIT_COLOR_RED);
 996                        return 4;
 997                } else if (!prefixcmp(placeholder + 1, "green")) {
 998                        strbuf_addstr(sb, GIT_COLOR_GREEN);
 999                        return 6;
1000                } else if (!prefixcmp(placeholder + 1, "blue")) {
1001                        strbuf_addstr(sb, GIT_COLOR_BLUE);
1002                        return 5;
1003                } else if (!prefixcmp(placeholder + 1, "reset")) {
1004                        strbuf_addstr(sb, GIT_COLOR_RESET);
1005                        return 6;
1006                } else
1007                        return 0;
1008        case 'n':               /* newline */
1009                strbuf_addch(sb, '\n');
1010                return 1;
1011        case 'x':
1012                /* %x00 == NUL, %x0a == LF, etc. */
1013                if (0 <= (h1 = hexval_table[0xff & placeholder[1]]) &&
1014                    h1 <= 16 &&
1015                    0 <= (h2 = hexval_table[0xff & placeholder[2]]) &&
1016                    h2 <= 16) {
1017                        strbuf_addch(sb, (h1<<4)|h2);
1018                        return 3;
1019                } else
1020                        return 0;
1021        case 'w':
1022                if (placeholder[1] == '(') {
1023                        unsigned long width = 0, indent1 = 0, indent2 = 0;
1024                        char *next;
1025                        const char *start = placeholder + 2;
1026                        const char *end = strchr(start, ')');
1027                        if (!end)
1028                                return 0;
1029                        if (end > start) {
1030                                width = strtoul(start, &next, 10);
1031                                if (*next == ',') {
1032                                        indent1 = strtoul(next + 1, &next, 10);
1033                                        if (*next == ',') {
1034                                                indent2 = strtoul(next + 1,
1035                                                                 &next, 10);
1036                                        }
1037                                }
1038                                if (*next != ')')
1039                                        return 0;
1040                        }
1041                        rewrap_message_tail(sb, c, width, indent1, indent2);
1042                        return end - placeholder + 1;
1043                } else
1044                        return 0;
1045        }
1046
1047        /* these depend on the commit */
1048        if (!commit->object.parsed)
1049                parse_object(commit->object.sha1);
1050
1051        switch (placeholder[0]) {
1052        case 'H':               /* commit hash */
1053                strbuf_addstr(sb, sha1_to_hex(commit->object.sha1));
1054                return 1;
1055        case 'h':               /* abbreviated commit hash */
1056                if (add_again(sb, &c->abbrev_commit_hash))
1057                        return 1;
1058                strbuf_addstr(sb, find_unique_abbrev(commit->object.sha1,
1059                                                     c->pretty_ctx->abbrev));
1060                c->abbrev_commit_hash.len = sb->len - c->abbrev_commit_hash.off;
1061                return 1;
1062        case 'T':               /* tree hash */
1063                strbuf_addstr(sb, sha1_to_hex(commit->tree->object.sha1));
1064                return 1;
1065        case 't':               /* abbreviated tree hash */
1066                if (add_again(sb, &c->abbrev_tree_hash))
1067                        return 1;
1068                strbuf_addstr(sb, find_unique_abbrev(commit->tree->object.sha1,
1069                                                     c->pretty_ctx->abbrev));
1070                c->abbrev_tree_hash.len = sb->len - c->abbrev_tree_hash.off;
1071                return 1;
1072        case 'P':               /* parent hashes */
1073                for (p = commit->parents; p; p = p->next) {
1074                        if (p != commit->parents)
1075                                strbuf_addch(sb, ' ');
1076                        strbuf_addstr(sb, sha1_to_hex(p->item->object.sha1));
1077                }
1078                return 1;
1079        case 'p':               /* abbreviated parent hashes */
1080                if (add_again(sb, &c->abbrev_parent_hashes))
1081                        return 1;
1082                for (p = commit->parents; p; p = p->next) {
1083                        if (p != commit->parents)
1084                                strbuf_addch(sb, ' ');
1085                        strbuf_addstr(sb, find_unique_abbrev(
1086                                        p->item->object.sha1,
1087                                        c->pretty_ctx->abbrev));
1088                }
1089                c->abbrev_parent_hashes.len = sb->len -
1090                                              c->abbrev_parent_hashes.off;
1091                return 1;
1092        case 'm':               /* left/right/bottom */
1093                strbuf_addstr(sb, get_revision_mark(NULL, commit));
1094                return 1;
1095        case 'd':
1096                format_decoration(sb, commit);
1097                return 1;
1098        case 'g':               /* reflog info */
1099                switch(placeholder[1]) {
1100                case 'd':       /* reflog selector */
1101                case 'D':
1102                        if (c->pretty_ctx->reflog_info)
1103                                get_reflog_selector(sb,
1104                                                    c->pretty_ctx->reflog_info,
1105                                                    c->pretty_ctx->date_mode,
1106                                                    c->pretty_ctx->date_mode_explicit,
1107                                                    (placeholder[1] == 'd'));
1108                        return 2;
1109                case 's':       /* reflog message */
1110                        if (c->pretty_ctx->reflog_info)
1111                                get_reflog_message(sb, c->pretty_ctx->reflog_info);
1112                        return 2;
1113                case 'n':
1114                case 'N':
1115                case 'e':
1116                case 'E':
1117                        return format_reflog_person(sb,
1118                                                    placeholder[1],
1119                                                    c->pretty_ctx->reflog_info,
1120                                                    c->pretty_ctx->date_mode);
1121                }
1122                return 0;       /* unknown %g placeholder */
1123        case 'N':
1124                if (c->pretty_ctx->notes_message) {
1125                        strbuf_addstr(sb, c->pretty_ctx->notes_message);
1126                        return 1;
1127                }
1128                return 0;
1129        }
1130
1131        if (placeholder[0] == 'G') {
1132                if (!c->commit_signature_parsed)
1133                        parse_commit_signature(c);
1134                switch (placeholder[1]) {
1135                case 'G':
1136                        if (c->signature.gpg_output)
1137                                strbuf_addstr(sb, c->signature.gpg_output);
1138                        break;
1139                case '?':
1140                        switch (c->signature.good_bad) {
1141                        case 'G':
1142                        case 'B':
1143                                strbuf_addch(sb, c->signature.good_bad);
1144                        }
1145                        break;
1146                case 'S':
1147                        if (c->signature.signer)
1148                                strbuf_addstr(sb, c->signature.signer);
1149                        break;
1150                }
1151                return 2;
1152        }
1153
1154
1155        /* For the rest we have to parse the commit header. */
1156        if (!c->commit_header_parsed)
1157                parse_commit_header(c);
1158
1159        switch (placeholder[0]) {
1160        case 'a':       /* author ... */
1161                return format_person_part(sb, placeholder[1],
1162                                   msg + c->author.off, c->author.len,
1163                                   c->pretty_ctx->date_mode);
1164        case 'c':       /* committer ... */
1165                return format_person_part(sb, placeholder[1],
1166                                   msg + c->committer.off, c->committer.len,
1167                                   c->pretty_ctx->date_mode);
1168        case 'e':       /* encoding */
1169                strbuf_add(sb, msg + c->encoding.off, c->encoding.len);
1170                return 1;
1171        case 'B':       /* raw body */
1172                /* message_off is always left at the initial newline */
1173                strbuf_addstr(sb, msg + c->message_off + 1);
1174                return 1;
1175        }
1176
1177        /* Now we need to parse the commit message. */
1178        if (!c->commit_message_parsed)
1179                parse_commit_message(c);
1180
1181        switch (placeholder[0]) {
1182        case 's':       /* subject */
1183                format_subject(sb, msg + c->subject_off, " ");
1184                return 1;
1185        case 'f':       /* sanitized subject */
1186                format_sanitized_subject(sb, msg + c->subject_off);
1187                return 1;
1188        case 'b':       /* body */
1189                strbuf_addstr(sb, msg + c->body_off);
1190                return 1;
1191        }
1192        return 0;       /* unknown placeholder */
1193}
1194
1195static size_t format_commit_item(struct strbuf *sb, const char *placeholder,
1196                                 void *context)
1197{
1198        int consumed;
1199        size_t orig_len;
1200        enum {
1201                NO_MAGIC,
1202                ADD_LF_BEFORE_NON_EMPTY,
1203                DEL_LF_BEFORE_EMPTY,
1204                ADD_SP_BEFORE_NON_EMPTY
1205        } magic = NO_MAGIC;
1206
1207        switch (placeholder[0]) {
1208        case '-':
1209                magic = DEL_LF_BEFORE_EMPTY;
1210                break;
1211        case '+':
1212                magic = ADD_LF_BEFORE_NON_EMPTY;
1213                break;
1214        case ' ':
1215                magic = ADD_SP_BEFORE_NON_EMPTY;
1216                break;
1217        default:
1218                break;
1219        }
1220        if (magic != NO_MAGIC)
1221                placeholder++;
1222
1223        orig_len = sb->len;
1224        consumed = format_commit_one(sb, placeholder, context);
1225        if (magic == NO_MAGIC)
1226                return consumed;
1227
1228        if ((orig_len == sb->len) && magic == DEL_LF_BEFORE_EMPTY) {
1229                while (sb->len && sb->buf[sb->len - 1] == '\n')
1230                        strbuf_setlen(sb, sb->len - 1);
1231        } else if (orig_len != sb->len) {
1232                if (magic == ADD_LF_BEFORE_NON_EMPTY)
1233                        strbuf_insert(sb, orig_len, "\n", 1);
1234                else if (magic == ADD_SP_BEFORE_NON_EMPTY)
1235                        strbuf_insert(sb, orig_len, " ", 1);
1236        }
1237        return consumed + 1;
1238}
1239
1240static size_t userformat_want_item(struct strbuf *sb, const char *placeholder,
1241                                   void *context)
1242{
1243        struct userformat_want *w = context;
1244
1245        if (*placeholder == '+' || *placeholder == '-' || *placeholder == ' ')
1246                placeholder++;
1247
1248        switch (*placeholder) {
1249        case 'N':
1250                w->notes = 1;
1251                break;
1252        }
1253        return 0;
1254}
1255
1256void userformat_find_requirements(const char *fmt, struct userformat_want *w)
1257{
1258        struct strbuf dummy = STRBUF_INIT;
1259
1260        if (!fmt) {
1261                if (!user_format)
1262                        return;
1263                fmt = user_format;
1264        }
1265        strbuf_expand(&dummy, fmt, userformat_want_item, w);
1266        strbuf_release(&dummy);
1267}
1268
1269void format_commit_message(const struct commit *commit,
1270                           const char *format, struct strbuf *sb,
1271                           const struct pretty_print_context *pretty_ctx)
1272{
1273        struct format_commit_context context;
1274        const char *output_enc = pretty_ctx->output_encoding;
1275
1276        memset(&context, 0, sizeof(context));
1277        context.commit = commit;
1278        context.pretty_ctx = pretty_ctx;
1279        context.wrap_start = sb->len;
1280        context.message = logmsg_reencode(commit, output_enc);
1281        if (!context.message)
1282                context.message = commit->buffer;
1283
1284        strbuf_expand(sb, format, format_commit_item, &context);
1285        rewrap_message_tail(sb, &context, 0, 0, 0);
1286
1287        if (context.message != commit->buffer)
1288                free(context.message);
1289        free(context.signature.gpg_output);
1290        free(context.signature.signer);
1291}
1292
1293static void pp_header(const struct pretty_print_context *pp,
1294                      const char *encoding,
1295                      const struct commit *commit,
1296                      const char **msg_p,
1297                      struct strbuf *sb)
1298{
1299        int parents_shown = 0;
1300
1301        for (;;) {
1302                const char *line = *msg_p;
1303                int linelen = get_one_line(*msg_p);
1304
1305                if (!linelen)
1306                        return;
1307                *msg_p += linelen;
1308
1309                if (linelen == 1)
1310                        /* End of header */
1311                        return;
1312
1313                if (pp->fmt == CMIT_FMT_RAW) {
1314                        strbuf_add(sb, line, linelen);
1315                        continue;
1316                }
1317
1318                if (!prefixcmp(line, "parent ")) {
1319                        if (linelen != 48)
1320                                die("bad parent line in commit");
1321                        continue;
1322                }
1323
1324                if (!parents_shown) {
1325                        struct commit_list *parent;
1326                        int num;
1327                        for (parent = commit->parents, num = 0;
1328                             parent;
1329                             parent = parent->next, num++)
1330                                ;
1331                        /* with enough slop */
1332                        strbuf_grow(sb, num * 50 + 20);
1333                        add_merge_info(pp, sb, commit);
1334                        parents_shown = 1;
1335                }
1336
1337                /*
1338                 * MEDIUM == DEFAULT shows only author with dates.
1339                 * FULL shows both authors but not dates.
1340                 * FULLER shows both authors and dates.
1341                 */
1342                if (!prefixcmp(line, "author ")) {
1343                        strbuf_grow(sb, linelen + 80);
1344                        pp_user_info(pp, "Author", sb, line + 7, encoding);
1345                }
1346                if (!prefixcmp(line, "committer ") &&
1347                    (pp->fmt == CMIT_FMT_FULL || pp->fmt == CMIT_FMT_FULLER)) {
1348                        strbuf_grow(sb, linelen + 80);
1349                        pp_user_info(pp, "Commit", sb, line + 10, encoding);
1350                }
1351        }
1352}
1353
1354void pp_title_line(const struct pretty_print_context *pp,
1355                   const char **msg_p,
1356                   struct strbuf *sb,
1357                   const char *encoding,
1358                   int need_8bit_cte)
1359{
1360        static const int max_length = 78; /* per rfc2047 */
1361        struct strbuf title;
1362
1363        strbuf_init(&title, 80);
1364        *msg_p = format_subject(&title, *msg_p,
1365                                pp->preserve_subject ? "\n" : " ");
1366
1367        strbuf_grow(sb, title.len + 1024);
1368        if (pp->subject) {
1369                strbuf_addstr(sb, pp->subject);
1370                if (needs_rfc2047_encoding(title.buf, title.len, RFC2047_SUBJECT))
1371                        add_rfc2047(sb, title.buf, title.len,
1372                                                encoding, RFC2047_SUBJECT);
1373                else
1374                        strbuf_add_wrapped_bytes(sb, title.buf, title.len,
1375                                         -last_line_length(sb), 1, max_length);
1376        } else {
1377                strbuf_addbuf(sb, &title);
1378        }
1379        strbuf_addch(sb, '\n');
1380
1381        if (need_8bit_cte > 0) {
1382                const char *header_fmt =
1383                        "MIME-Version: 1.0\n"
1384                        "Content-Type: text/plain; charset=%s\n"
1385                        "Content-Transfer-Encoding: 8bit\n";
1386                strbuf_addf(sb, header_fmt, encoding);
1387        }
1388        if (pp->after_subject) {
1389                strbuf_addstr(sb, pp->after_subject);
1390        }
1391        if (pp->fmt == CMIT_FMT_EMAIL) {
1392                strbuf_addch(sb, '\n');
1393        }
1394        strbuf_release(&title);
1395}
1396
1397void pp_remainder(const struct pretty_print_context *pp,
1398                  const char **msg_p,
1399                  struct strbuf *sb,
1400                  int indent)
1401{
1402        int first = 1;
1403        for (;;) {
1404                const char *line = *msg_p;
1405                int linelen = get_one_line(line);
1406                *msg_p += linelen;
1407
1408                if (!linelen)
1409                        break;
1410
1411                if (is_empty_line(line, &linelen)) {
1412                        if (first)
1413                                continue;
1414                        if (pp->fmt == CMIT_FMT_SHORT)
1415                                break;
1416                }
1417                first = 0;
1418
1419                strbuf_grow(sb, linelen + indent + 20);
1420                if (indent) {
1421                        memset(sb->buf + sb->len, ' ', indent);
1422                        strbuf_setlen(sb, sb->len + indent);
1423                }
1424                strbuf_add(sb, line, linelen);
1425                strbuf_addch(sb, '\n');
1426        }
1427}
1428
1429void pretty_print_commit(const struct pretty_print_context *pp,
1430                         const struct commit *commit,
1431                         struct strbuf *sb)
1432{
1433        unsigned long beginning_of_body;
1434        int indent = 4;
1435        const char *msg = commit->buffer;
1436        char *reencoded;
1437        const char *encoding;
1438        int need_8bit_cte = pp->need_8bit_cte;
1439
1440        if (pp->fmt == CMIT_FMT_USERFORMAT) {
1441                format_commit_message(commit, user_format, sb, pp);
1442                return;
1443        }
1444
1445        encoding = get_log_output_encoding();
1446        reencoded = logmsg_reencode(commit, encoding);
1447        if (reencoded) {
1448                msg = reencoded;
1449        }
1450
1451        if (pp->fmt == CMIT_FMT_ONELINE || pp->fmt == CMIT_FMT_EMAIL)
1452                indent = 0;
1453
1454        /*
1455         * We need to check and emit Content-type: to mark it
1456         * as 8-bit if we haven't done so.
1457         */
1458        if (pp->fmt == CMIT_FMT_EMAIL && need_8bit_cte == 0) {
1459                int i, ch, in_body;
1460
1461                for (in_body = i = 0; (ch = msg[i]); i++) {
1462                        if (!in_body) {
1463                                /* author could be non 7-bit ASCII but
1464                                 * the log may be so; skip over the
1465                                 * header part first.
1466                                 */
1467                                if (ch == '\n' && msg[i+1] == '\n')
1468                                        in_body = 1;
1469                        }
1470                        else if (non_ascii(ch)) {
1471                                need_8bit_cte = 1;
1472                                break;
1473                        }
1474                }
1475        }
1476
1477        pp_header(pp, encoding, commit, &msg, sb);
1478        if (pp->fmt != CMIT_FMT_ONELINE && !pp->subject) {
1479                strbuf_addch(sb, '\n');
1480        }
1481
1482        /* Skip excess blank lines at the beginning of body, if any... */
1483        msg = skip_empty_lines(msg);
1484
1485        /* These formats treat the title line specially. */
1486        if (pp->fmt == CMIT_FMT_ONELINE || pp->fmt == CMIT_FMT_EMAIL)
1487                pp_title_line(pp, &msg, sb, encoding, need_8bit_cte);
1488
1489        beginning_of_body = sb->len;
1490        if (pp->fmt != CMIT_FMT_ONELINE)
1491                pp_remainder(pp, &msg, sb, indent);
1492        strbuf_rtrim(sb);
1493
1494        /* Make sure there is an EOLN for the non-oneline case */
1495        if (pp->fmt != CMIT_FMT_ONELINE)
1496                strbuf_addch(sb, '\n');
1497
1498        /*
1499         * The caller may append additional body text in e-mail
1500         * format.  Make sure we did not strip the blank line
1501         * between the header and the body.
1502         */
1503        if (pp->fmt == CMIT_FMT_EMAIL && sb->len <= beginning_of_body)
1504                strbuf_addch(sb, '\n');
1505
1506        free(reencoded);
1507}
1508
1509void pp_commit_easy(enum cmit_fmt fmt, const struct commit *commit,
1510                    struct strbuf *sb)
1511{
1512        struct pretty_print_context pp = {0};
1513        pp.fmt = fmt;
1514        pretty_print_commit(&pp, commit, sb);
1515}