log-tree.con commit Merge branch 'master' of git://git.kernel.org/pub/scm/gitk/gitk (941fd1c)
   1#include "cache.h"
   2#include "diff.h"
   3#include "commit.h"
   4#include "log-tree.h"
   5#include "reflog-walk.h"
   6
   7struct decoration name_decoration = { "object names" };
   8
   9static void show_parents(struct commit *commit, int abbrev)
  10{
  11        struct commit_list *p;
  12        for (p = commit->parents; p ; p = p->next) {
  13                struct commit *parent = p->item;
  14                printf(" %s", diff_unique_abbrev(parent->object.sha1, abbrev));
  15        }
  16}
  17
  18static void show_decorations(struct commit *commit)
  19{
  20        const char *prefix;
  21        struct name_decoration *decoration;
  22
  23        decoration = lookup_decoration(&name_decoration, &commit->object);
  24        if (!decoration)
  25                return;
  26        prefix = " (";
  27        while (decoration) {
  28                printf("%s%s", prefix, decoration->name);
  29                prefix = ", ";
  30                decoration = decoration->next;
  31        }
  32        putchar(')');
  33}
  34
  35/*
  36 * Search for "^[-A-Za-z]+: [^@]+@" pattern. It usually matches
  37 * Signed-off-by: and Acked-by: lines.
  38 */
  39static int detect_any_signoff(char *letter, int size)
  40{
  41        char ch, *cp;
  42        int seen_colon = 0;
  43        int seen_at = 0;
  44        int seen_name = 0;
  45        int seen_head = 0;
  46
  47        cp = letter + size;
  48        while (letter <= --cp && (ch = *cp) == '\n')
  49                continue;
  50
  51        while (letter <= cp) {
  52                ch = *cp--;
  53                if (ch == '\n')
  54                        break;
  55
  56                if (!seen_at) {
  57                        if (ch == '@')
  58                                seen_at = 1;
  59                        continue;
  60                }
  61                if (!seen_colon) {
  62                        if (ch == '@')
  63                                return 0;
  64                        else if (ch == ':')
  65                                seen_colon = 1;
  66                        else
  67                                seen_name = 1;
  68                        continue;
  69                }
  70                if (('A' <= ch && ch <= 'Z') ||
  71                    ('a' <= ch && ch <= 'z') ||
  72                    ch == '-') {
  73                        seen_head = 1;
  74                        continue;
  75                }
  76                /* no empty last line doesn't match */
  77                return 0;
  78        }
  79        return seen_head && seen_name;
  80}
  81
  82static unsigned long append_signoff(char **buf_p, unsigned long *buf_sz_p,
  83                                    unsigned long at, const char *signoff)
  84{
  85        static const char signed_off_by[] = "Signed-off-by: ";
  86        size_t signoff_len = strlen(signoff);
  87        int has_signoff = 0;
  88        char *cp;
  89        char *buf;
  90        unsigned long buf_sz;
  91
  92        buf = *buf_p;
  93        buf_sz = *buf_sz_p;
  94        if (buf_sz <= at + strlen(signed_off_by) + signoff_len + 3) {
  95                buf_sz += strlen(signed_off_by) + signoff_len + 3;
  96                buf = xrealloc(buf, buf_sz);
  97                *buf_p = buf;
  98                *buf_sz_p = buf_sz;
  99        }
 100        cp = buf;
 101
 102        /* First see if we already have the sign-off by the signer */
 103        while ((cp = strstr(cp, signed_off_by))) {
 104
 105                has_signoff = 1;
 106
 107                cp += strlen(signed_off_by);
 108                if (cp + signoff_len >= buf + at)
 109                        break;
 110                if (strncmp(cp, signoff, signoff_len))
 111                        continue;
 112                if (!isspace(cp[signoff_len]))
 113                        continue;
 114                /* we already have him */
 115                return at;
 116        }
 117
 118        if (!has_signoff)
 119                has_signoff = detect_any_signoff(buf, at);
 120
 121        if (!has_signoff)
 122                buf[at++] = '\n';
 123
 124        strcpy(buf + at, signed_off_by);
 125        at += strlen(signed_off_by);
 126        strcpy(buf + at, signoff);
 127        at += signoff_len;
 128        buf[at++] = '\n';
 129        buf[at] = 0;
 130        return at;
 131}
 132
 133static unsigned int digits_in_number(unsigned int number)
 134{
 135        unsigned int i = 10, result = 1;
 136        while (i <= number) {
 137                i *= 10;
 138                result++;
 139        }
 140        return result;
 141}
 142
 143void show_log(struct rev_info *opt, const char *sep)
 144{
 145        char *msgbuf = NULL;
 146        unsigned long msgbuf_len = 0;
 147        struct log_info *log = opt->loginfo;
 148        struct commit *commit = log->commit, *parent = log->parent;
 149        int abbrev = opt->diffopt.abbrev;
 150        int abbrev_commit = opt->abbrev_commit ? opt->abbrev : 40;
 151        const char *extra;
 152        int len;
 153        const char *subject = NULL, *extra_headers = opt->extra_headers;
 154
 155        opt->loginfo = NULL;
 156        if (!opt->verbose_header) {
 157                if (opt->left_right) {
 158                        if (commit->object.flags & BOUNDARY)
 159                                putchar('-');
 160                        else if (commit->object.flags & SYMMETRIC_LEFT)
 161                                putchar('<');
 162                        else
 163                                putchar('>');
 164                }
 165                fputs(diff_unique_abbrev(commit->object.sha1, abbrev_commit), stdout);
 166                if (opt->parents)
 167                        show_parents(commit, abbrev_commit);
 168                show_decorations(commit);
 169                putchar(opt->diffopt.line_termination);
 170                return;
 171        }
 172
 173        /*
 174         * The "oneline" format has several special cases:
 175         *  - The pretty-printed commit lacks a newline at the end
 176         *    of the buffer, but we do want to make sure that we
 177         *    have a newline there. If the separator isn't already
 178         *    a newline, add an extra one.
 179         *  - unlike other log messages, the one-line format does
 180         *    not have an empty line between entries.
 181         */
 182        extra = "";
 183        if (*sep != '\n' && opt->commit_format == CMIT_FMT_ONELINE)
 184                extra = "\n";
 185        if (opt->shown_one && opt->commit_format != CMIT_FMT_ONELINE)
 186                putchar(opt->diffopt.line_termination);
 187        opt->shown_one = 1;
 188
 189        /*
 190         * Print header line of header..
 191         */
 192
 193        if (opt->commit_format == CMIT_FMT_EMAIL) {
 194                char *sha1 = sha1_to_hex(commit->object.sha1);
 195                if (opt->total > 0) {
 196                        static char buffer[64];
 197                        snprintf(buffer, sizeof(buffer),
 198                                        "Subject: [%s %0*d/%d] ",
 199                                        opt->subject_prefix,
 200                                        digits_in_number(opt->total),
 201                                        opt->nr, opt->total);
 202                        subject = buffer;
 203                } else if (opt->total == 0 && opt->subject_prefix && *opt->subject_prefix) {
 204                        static char buffer[256];
 205                        snprintf(buffer, sizeof(buffer),
 206                                        "Subject: [%s] ",
 207                                        opt->subject_prefix);
 208                        subject = buffer;
 209                } else {
 210                        subject = "Subject: ";
 211                }
 212
 213                printf("From %s Mon Sep 17 00:00:00 2001\n", sha1);
 214                if (opt->message_id)
 215                        printf("Message-Id: <%s>\n", opt->message_id);
 216                if (opt->ref_message_id)
 217                        printf("In-Reply-To: <%s>\nReferences: <%s>\n",
 218                               opt->ref_message_id, opt->ref_message_id);
 219                if (opt->mime_boundary) {
 220                        static char subject_buffer[1024];
 221                        static char buffer[1024];
 222                        snprintf(subject_buffer, sizeof(subject_buffer) - 1,
 223                                 "%s"
 224                                 "MIME-Version: 1.0\n"
 225                                 "Content-Type: multipart/mixed;"
 226                                 " boundary=\"%s%s\"\n"
 227                                 "\n"
 228                                 "This is a multi-part message in MIME "
 229                                 "format.\n"
 230                                 "--%s%s\n"
 231                                 "Content-Type: text/plain; "
 232                                 "charset=UTF-8; format=fixed\n"
 233                                 "Content-Transfer-Encoding: 8bit\n\n",
 234                                 extra_headers ? extra_headers : "",
 235                                 mime_boundary_leader, opt->mime_boundary,
 236                                 mime_boundary_leader, opt->mime_boundary);
 237                        extra_headers = subject_buffer;
 238
 239                        snprintf(buffer, sizeof(buffer) - 1,
 240                                 "--%s%s\n"
 241                                 "Content-Type: text/x-patch;"
 242                                 " name=\"%s.diff\"\n"
 243                                 "Content-Transfer-Encoding: 8bit\n"
 244                                 "Content-Disposition: %s;"
 245                                 " filename=\"%s.diff\"\n\n",
 246                                 mime_boundary_leader, opt->mime_boundary,
 247                                 sha1,
 248                                 opt->no_inline ? "attachment" : "inline",
 249                                 sha1);
 250                        opt->diffopt.stat_sep = buffer;
 251                }
 252        } else if (opt->commit_format != CMIT_FMT_USERFORMAT) {
 253                fputs(diff_get_color(opt->diffopt.color_diff, DIFF_COMMIT),
 254                      stdout);
 255                if (opt->commit_format != CMIT_FMT_ONELINE)
 256                        fputs("commit ", stdout);
 257                if (commit->object.flags & BOUNDARY)
 258                        putchar('-');
 259                else if (opt->left_right) {
 260                        if (commit->object.flags & SYMMETRIC_LEFT)
 261                                putchar('<');
 262                        else
 263                                putchar('>');
 264                }
 265                fputs(diff_unique_abbrev(commit->object.sha1, abbrev_commit),
 266                      stdout);
 267                if (opt->parents)
 268                        show_parents(commit, abbrev_commit);
 269                if (parent)
 270                        printf(" (from %s)",
 271                               diff_unique_abbrev(parent->object.sha1,
 272                                                  abbrev_commit));
 273                show_decorations(commit);
 274                printf("%s",
 275                       diff_get_color(opt->diffopt.color_diff, DIFF_RESET));
 276                putchar(opt->commit_format == CMIT_FMT_ONELINE ? ' ' : '\n');
 277                if (opt->reflog_info) {
 278                        show_reflog_message(opt->reflog_info,
 279                                    opt->commit_format == CMIT_FMT_ONELINE,
 280                                    opt->date_mode);
 281                        if (opt->commit_format == CMIT_FMT_ONELINE) {
 282                                printf("%s", sep);
 283                                return;
 284                        }
 285                }
 286        }
 287
 288        /*
 289         * And then the pretty-printed message itself
 290         */
 291        len = pretty_print_commit(opt->commit_format, commit, ~0u,
 292                                  &msgbuf, &msgbuf_len, abbrev, subject,
 293                                  extra_headers, opt->date_mode);
 294
 295        if (opt->add_signoff)
 296                len = append_signoff(&msgbuf, &msgbuf_len, len,
 297                                     opt->add_signoff);
 298        if (opt->show_log_size)
 299                printf("log size %i\n", len);
 300
 301        printf("%s%s%s", msgbuf, extra, sep);
 302        free(msgbuf);
 303}
 304
 305int log_tree_diff_flush(struct rev_info *opt)
 306{
 307        diffcore_std(&opt->diffopt);
 308
 309        if (diff_queue_is_empty()) {
 310                int saved_fmt = opt->diffopt.output_format;
 311                opt->diffopt.output_format = DIFF_FORMAT_NO_OUTPUT;
 312                diff_flush(&opt->diffopt);
 313                opt->diffopt.output_format = saved_fmt;
 314                return 0;
 315        }
 316
 317        if (opt->loginfo && !opt->no_commit_id) {
 318                /* When showing a verbose header (i.e. log message),
 319                 * and not in --pretty=oneline format, we would want
 320                 * an extra newline between the end of log and the
 321                 * output for readability.
 322                 */
 323                show_log(opt, opt->diffopt.msg_sep);
 324                if (opt->verbose_header &&
 325                    opt->commit_format != CMIT_FMT_ONELINE) {
 326                        int pch = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH;
 327                        if ((pch & opt->diffopt.output_format) == pch)
 328                                printf("---");
 329                        putchar('\n');
 330                }
 331        }
 332        diff_flush(&opt->diffopt);
 333        return 1;
 334}
 335
 336static int do_diff_combined(struct rev_info *opt, struct commit *commit)
 337{
 338        unsigned const char *sha1 = commit->object.sha1;
 339
 340        diff_tree_combined_merge(sha1, opt->dense_combined_merges, opt);
 341        return !opt->loginfo;
 342}
 343
 344/*
 345 * Show the diff of a commit.
 346 *
 347 * Return true if we printed any log info messages
 348 */
 349static int log_tree_diff(struct rev_info *opt, struct commit *commit, struct log_info *log)
 350{
 351        int showed_log;
 352        struct commit_list *parents;
 353        unsigned const char *sha1 = commit->object.sha1;
 354
 355        if (!opt->diff)
 356                return 0;
 357
 358        /* Root commit? */
 359        parents = commit->parents;
 360        if (!parents) {
 361                if (opt->show_root_diff) {
 362                        diff_root_tree_sha1(sha1, "", &opt->diffopt);
 363                        log_tree_diff_flush(opt);
 364                }
 365                return !opt->loginfo;
 366        }
 367
 368        /* More than one parent? */
 369        if (parents && parents->next) {
 370                if (opt->ignore_merges)
 371                        return 0;
 372                else if (opt->combine_merges)
 373                        return do_diff_combined(opt, commit);
 374
 375                /* If we show individual diffs, show the parent info */
 376                log->parent = parents->item;
 377        }
 378
 379        showed_log = 0;
 380        for (;;) {
 381                struct commit *parent = parents->item;
 382
 383                diff_tree_sha1(parent->object.sha1, sha1, "", &opt->diffopt);
 384                log_tree_diff_flush(opt);
 385
 386                showed_log |= !opt->loginfo;
 387
 388                /* Set up the log info for the next parent, if any.. */
 389                parents = parents->next;
 390                if (!parents)
 391                        break;
 392                log->parent = parents->item;
 393                opt->loginfo = log;
 394        }
 395        return showed_log;
 396}
 397
 398int log_tree_commit(struct rev_info *opt, struct commit *commit)
 399{
 400        struct log_info log;
 401        int shown;
 402
 403        log.commit = commit;
 404        log.parent = NULL;
 405        opt->loginfo = &log;
 406
 407        shown = log_tree_diff(opt, commit, &log);
 408        if (!shown && opt->loginfo && opt->always_show_header) {
 409                log.parent = NULL;
 410                show_log(opt, "");
 411                shown = 1;
 412        }
 413        opt->loginfo = NULL;
 414        maybe_flush_or_die(stdout, "stdout");
 415        return shown;
 416}