builtin-log.c

   1 /*
   2  * Builtin "git log" and related commands (show, whatchanged)
   3  *
   4  * (C) Copyright 2006 Linus Torvalds
   5  *               2006 Junio Hamano
   6  */
   7 #include "cache.h"
   8 #include "commit.h"
   9 #include "diff.h"
  10 #include "revision.h"
  11 #include "log-tree.h"
  12 #include "builtin.h"
  13
  14 /* this is in builtin-diff.c */
  15 void add_head(struct rev_info *revs);
  16
  17 static void cmd_log_init(int argc, const char **argv, char **envp,
  18                       struct rev_info *rev)
  19 {
  20         rev->abbrev = DEFAULT_ABBREV;
  21         rev->commit_format = CMIT_FMT_DEFAULT;
  22         rev->verbose_header = 1;
  23         argc = setup_revisions(argc, argv, rev, "HEAD");
  24         if (rev->diffopt.pickaxe || rev->diffopt.filter)
  25                 rev->always_show_header = 0;
  26         if (argc > 1)
  27                 die("unrecognized argument: %s", argv[1]);
  28 }
  29
  30 static int cmd_log_walk(struct rev_info *rev)
  31 {
  32         struct commit *commit;
  33
  34         prepare_revision_walk(rev);
  35         setup_pager();
  36         while ((commit = get_revision(rev)) != NULL) {
  37                 log_tree_commit(rev, commit);
  38                 free(commit->buffer);
  39                 commit->buffer = NULL;
  40                 free_commit_list(commit->parents);
  41                 commit->parents = NULL;
  42         }
  43         return 0;
  44 }
  45
  46 int cmd_whatchanged(int argc, const char **argv, char **envp)
  47 {
  48         struct rev_info rev;
  49
  50         git_config(git_diff_ui_config);
  51         init_revisions(&rev);
  52         rev.diff = 1;
  53         rev.diffopt.recursive = 1;
  54         rev.simplify_history = 0;
  55         cmd_log_init(argc, argv, envp, &rev);
  56         if (!rev.diffopt.output_format)
  57                 rev.diffopt.output_format = DIFF_FORMAT_RAW;
  58         return cmd_log_walk(&rev);
  59 }
  60
  61 int cmd_show(int argc, const char **argv, char **envp)
  62 {
  63         struct rev_info rev;
  64
  65         git_config(git_diff_ui_config);
  66         init_revisions(&rev);
  67         rev.diff = 1;
  68         rev.diffopt.recursive = 1;
  69         rev.combine_merges = 1;
  70         rev.dense_combined_merges = 1;
  71         rev.always_show_header = 1;
  72         rev.ignore_merges = 0;
  73         rev.no_walk = 1;
  74         cmd_log_init(argc, argv, envp, &rev);
  75         return cmd_log_walk(&rev);
  76 }
  77
  78 int cmd_log(int argc, const char **argv, char **envp)
  79 {
  80         struct rev_info rev;
  81
  82         git_config(git_diff_ui_config);
  83         init_revisions(&rev);
  84         rev.always_show_header = 1;
  85         cmd_log_init(argc, argv, envp, &rev);
  86         return cmd_log_walk(&rev);
  87 }
  88
  89 static int istitlechar(char c)
  90 {
  91         return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') ||
  92                 (c >= '0' && c <= '9') || c == '.' || c == '_';
  93 }
  94
  95 static char *extra_headers = NULL;
  96 static int extra_headers_size = 0;
  97
  98 static int git_format_config(const char *var, const char *value)
  99 {
 100         if (!strcmp(var, "format.headers")) {
 101                 int len = strlen(value);
 102                 extra_headers_size += len + 1;
 103                 extra_headers = realloc(extra_headers, extra_headers_size);
 104                 extra_headers[extra_headers_size - len - 1] = 0;
 105                 strcat(extra_headers, value);
 106                 return 0;
 107         }
 108         if (!strcmp(var, "diff.color")) {
 109                 return 0;
 110         }
 111         return git_diff_ui_config(var, value);
 112 }
 113
 114
 115 static FILE *realstdout = NULL;
 116 static const char *output_directory = NULL;
 117
 118 static void reopen_stdout(struct commit *commit, int nr, int keep_subject)
 119 {
 120         char filename[1024];
 121         char *sol;
 122         int len = 0;
 123
 124         if (output_directory) {
 125                 strlcpy(filename, output_directory, 1010);
 126                 len = strlen(filename);
 127                 if (filename[len - 1] != '/')
 128                         filename[len++] = '/';
 129         }
 130
 131         sprintf(filename + len, "%04d", nr);
 132         len = strlen(filename);
 133
 134         sol = strstr(commit->buffer, "\n\n");
 135         if (sol) {
 136                 int j, space = 1;
 137
 138                 sol += 2;
 139                 /* strip [PATCH] or [PATCH blabla] */
 140                 if (!keep_subject && !strncmp(sol, "[PATCH", 6)) {
 141                         char *eos = strchr(sol + 6, ']');
 142                         if (eos) {
 143                                 while (isspace(*eos))
 144                                         eos++;
 145                                 sol = eos;
 146                         }
 147                 }
 148
 149                 for (j = 0; len < 1024 - 6 && sol[j] && sol[j] != '\n'; j++) {
 150                         if (istitlechar(sol[j])) {
 151                                 if (space) {
 152                                         filename[len++] = '-';
 153                                         space = 0;
 154                                 }
 155                                 filename[len++] = sol[j];
 156                                 if (sol[j] == '.')
 157                                         while (sol[j + 1] == '.')
 158                                                 j++;
 159                         } else
 160                                 space = 1;
 161                 }
 162                 while (filename[len - 1] == '.' || filename[len - 1] == '-')
 163                         len--;
 164         }
 165         strcpy(filename + len, ".txt");
 166         fprintf(realstdout, "%s\n", filename);
 167         freopen(filename, "w", stdout);
 168 }
 169
 170 static int get_patch_id(struct commit *commit, struct diff_options *options,
 171                 unsigned char *sha1)
 172 {
 173         diff_tree_sha1(commit->parents->item->object.sha1, commit->object.sha1,
 174                         "", options);
 175         diffcore_std(options);
 176         return diff_flush_patch_id(options, sha1);
 177 }
 178
 179 static void get_patch_ids(struct rev_info *rev, struct diff_options *options)
 180 {
 181         struct rev_info check_rev;
 182         struct commit *commit;
 183         struct object *o1, *o2;
 184         unsigned flags1, flags2;
 185         unsigned char sha1[20];
 186
 187         if (rev->pending.nr != 2)
 188                 die("Need exactly one range.");
 189
 190         o1 = rev->pending.objects[0].item;
 191         flags1 = o1->flags;
 192         o2 = rev->pending.objects[1].item;
 193         flags2 = o2->flags;
 194
 195         if ((flags1 & UNINTERESTING) == (flags2 & UNINTERESTING))
 196                 die("Not a range.");
 197
 198         diff_setup(options);
 199         options->recursive = 1;
 200         if (diff_setup_done(options) < 0)
 201                 die("diff_setup_done failed");
 202
 203         /* given a range a..b get all patch ids for b..a */
 204         init_revisions(&check_rev);
 205         o1->flags ^= UNINTERESTING;
 206         o2->flags ^= UNINTERESTING;
 207         add_pending_object(&check_rev, o1, "o1");
 208         add_pending_object(&check_rev, o2, "o2");
 209         prepare_revision_walk(&check_rev);
 210
 211         while ((commit = get_revision(&check_rev)) != NULL) {
 212                 /* ignore merges */
 213                 if (commit->parents && commit->parents->next)
 214                         continue;
 215
 216                 if (!get_patch_id(commit, options, sha1))
 217                         created_object(sha1, xcalloc(1, sizeof(struct object)));
 218         }
 219
 220         /* reset for next revision walk */
 221         clear_commit_marks((struct commit *)o1,
 222                         SEEN | UNINTERESTING | SHOWN | ADDED);
 223         clear_commit_marks((struct commit *)o2,
 224                         SEEN | UNINTERESTING | SHOWN | ADDED);
 225         o1->flags = flags1;
 226         o2->flags = flags2;
 227 }
 228
 229 static void gen_message_id(char *dest, unsigned int length, char *base)
 230 {
 231         const char *committer = git_committer_info(1);
 232         const char *email_start = strrchr(committer, '<');
 233         const char *email_end = strrchr(committer, '>');
 234         if(!email_start || !email_end || email_start > email_end - 1)
 235                 die("Could not extract email from committer identity.");
 236         snprintf(dest, length, "%s.%u.git.%.*s", base, time(NULL),
 237                  email_end - email_start - 1, email_start + 1);
 238 }
 239
 240 int cmd_format_patch(int argc, const char **argv, char **envp)
 241 {
 242         struct commit *commit;
 243         struct commit **list = NULL;
 244         struct rev_info rev;
 245         int nr = 0, total, i, j;
 246         int use_stdout = 0;
 247         int numbered = 0;
 248         int start_number = -1;
 249         int keep_subject = 0;
 250         int ignore_if_in_upstream = 0;
 251         int thread = 0;
 252         struct diff_options patch_id_opts;
 253         char *add_signoff = NULL;
 254         char message_id[1024];
 255         char ref_message_id[1024];
 256
 257         git_config(git_format_config);
 258         init_revisions(&rev);
 259         rev.commit_format = CMIT_FMT_EMAIL;
 260         rev.verbose_header = 1;
 261         rev.diff = 1;
 262         rev.combine_merges = 0;
 263         rev.ignore_merges = 1;
 264         rev.diffopt.msg_sep = "";
 265         rev.diffopt.recursive = 1;
 266
 267         rev.extra_headers = extra_headers;
 268
 269         /*
 270          * Parse the arguments before setup_revisions(), or something
 271          * like "git fmt-patch -o a123 HEAD^.." may fail; a123 is
 272          * possibly a valid SHA1.
 273          */
 274         for (i = 1, j = 1; i < argc; i++) {
 275                 if (!strcmp(argv[i], "--stdout"))
 276                         use_stdout = 1;
 277                 else if (!strcmp(argv[i], "-n") ||
 278                                 !strcmp(argv[i], "--numbered"))
 279                         numbered = 1;
 280                 else if (!strncmp(argv[i], "--start-number=", 15))
 281                         start_number = strtol(argv[i] + 15, NULL, 10);
 282                 else if (!strcmp(argv[i], "--start-number")) {
 283                         i++;
 284                         if (i == argc)
 285                                 die("Need a number for --start-number");
 286                         start_number = strtol(argv[i], NULL, 10);
 287                 }
 288                 else if (!strcmp(argv[i], "-k") ||
 289                                 !strcmp(argv[i], "--keep-subject")) {
 290                         keep_subject = 1;
 291                         rev.total = -1;
 292                 }
 293                 else if (!strcmp(argv[i], "--output-directory") ||
 294                          !strcmp(argv[i], "-o")) {
 295                         i++;
 296                         if (argc <= i)
 297                                 die("Which directory?");
 298                         if (output_directory)
 299                                 die("Two output directories?");
 300                         output_directory = argv[i];
 301                 }
 302                 else if (!strcmp(argv[i], "--signoff") ||
 303                          !strcmp(argv[i], "-s")) {
 304                         const char *committer;
 305                         const char *endpos;
 306                         setup_ident();
 307                         committer = git_committer_info(1);
 308                         endpos = strchr(committer, '>');
 309                         if (!endpos)
 310                                 die("bogos committer info %s\n", committer);
 311                         add_signoff = xmalloc(endpos - committer + 2);
 312                         memcpy(add_signoff, committer, endpos - committer + 1);
 313                         add_signoff[endpos - committer + 1] = 0;
 314                 }
 315                 else if (!strcmp(argv[i], "--attach"))
 316                         rev.mime_boundary = git_version_string;
 317                 else if (!strncmp(argv[i], "--attach=", 9))
 318                         rev.mime_boundary = argv[i] + 9;
 319                 else if (!strcmp(argv[i], "--ignore-if-in-upstream"))
 320                         ignore_if_in_upstream = 1;
 321                 else if (!strcmp(argv[i], "--thread"))
 322                         thread = 1;
 323                 else
 324                         argv[j++] = argv[i];
 325         }
 326         argc = j;
 327
 328         if (start_number < 0)
 329                 start_number = 1;
 330         if (numbered && keep_subject)
 331                 die ("-n and -k are mutually exclusive.");
 332
 333         argc = setup_revisions(argc, argv, &rev, "HEAD");
 334         if (argc > 1)
 335                 die ("unrecognized argument: %s", argv[1]);
 336
 337         if (!rev.diffopt.output_format)
 338                 rev.diffopt.output_format = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH;
 339
 340         if (output_directory) {
 341                 if (use_stdout)
 342                         die("standard output, or directory, which one?");
 343                 if (mkdir(output_directory, 0777) < 0 && errno != EEXIST)
 344                         die("Could not create directory %s",
 345                             output_directory);
 346         }
 347
 348         if (rev.pending.nr == 1) {
 349                 rev.pending.objects[0].item->flags |= UNINTERESTING;
 350                 add_head(&rev);
 351         }
 352
 353         if (ignore_if_in_upstream)
 354                 get_patch_ids(&rev, &patch_id_opts);
 355
 356         if (!use_stdout)
 357                 realstdout = fdopen(dup(1), "w");
 358
 359         prepare_revision_walk(&rev);
 360         while ((commit = get_revision(&rev)) != NULL) {
 361                 unsigned char sha1[20];
 362
 363                 /* ignore merges */
 364                 if (commit->parents && commit->parents->next)
 365                         continue;
 366
 367                 if (ignore_if_in_upstream &&
 368                                 !get_patch_id(commit, &patch_id_opts, sha1) &&
 369                                 lookup_object(sha1))
 370                         continue;
 371
 372                 nr++;
 373                 list = realloc(list, nr * sizeof(list[0]));
 374                 list[nr - 1] = commit;
 375         }
 376         total = nr;
 377         if (numbered)
 378                 rev.total = total + start_number - 1;
 379         rev.add_signoff = add_signoff;
 380         while (0 <= --nr) {
 381                 int shown;
 382                 commit = list[nr];
 383                 rev.nr = total - nr + (start_number - 1);
 384                 /* Make the second and subsequent mails replies to the first */
 385                 if (thread) {
 386                         if (nr == (total - 2)) {
 387                                 strncpy(ref_message_id, message_id,
 388                                         sizeof(ref_message_id));
 389                                 ref_message_id[sizeof(ref_message_id)-1]='\0';
 390                                 rev.ref_message_id = ref_message_id;
 391                         }
 392                         gen_message_id(message_id, sizeof(message_id),
 393                                        sha1_to_hex(commit->object.sha1));
 394                         rev.message_id = message_id;
 395                 }
 396                 if (!use_stdout)
 397                         reopen_stdout(commit, rev.nr, keep_subject);
 398                 shown = log_tree_commit(&rev, commit);
 399                 free(commit->buffer);
 400                 commit->buffer = NULL;
 401
 402                 /* We put one extra blank line between formatted
 403                  * patches and this flag is used by log-tree code
 404                  * to see if it needs to emit a LF before showing
 405                  * the log; when using one file per patch, we do
 406                  * not want the extra blank line.
 407                  */
 408                 if (!use_stdout)
 409                         rev.shown_one = 0;
 410                 if (shown) {
 411                         if (rev.mime_boundary)
 412                                 printf("\n--%s%s--\n\n\n",
 413                                        mime_boundary_leader,
 414                                        rev.mime_boundary);
 415                         else
 416                                 printf("-- \n%s\n\n", git_version_string);
 417                 }
 418                 if (!use_stdout)
 419                         fclose(stdout);
 420         }
 421         free(list);
 422         return 0;
 423 }
 424