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 #include <time.h>
  14 #include <sys/time.h>
  15
  16 /* this is in builtin-diff.c */
  17 void add_head(struct rev_info *revs);
  18
  19 static void cmd_log_init(int argc, const char **argv, char **envp,
  20                       struct rev_info *rev)
  21 {
  22         rev->abbrev = DEFAULT_ABBREV;
  23         rev->commit_format = CMIT_FMT_DEFAULT;
  24         rev->verbose_header = 1;
  25         argc = setup_revisions(argc, argv, rev, "HEAD");
  26         if (rev->diffopt.pickaxe || rev->diffopt.filter)
  27                 rev->always_show_header = 0;
  28         if (argc > 1)
  29                 die("unrecognized argument: %s", argv[1]);
  30 }
  31
  32 static int cmd_log_walk(struct rev_info *rev)
  33 {
  34         struct commit *commit;
  35
  36         prepare_revision_walk(rev);
  37         setup_pager();
  38         while ((commit = get_revision(rev)) != NULL) {
  39                 log_tree_commit(rev, commit);
  40                 free(commit->buffer);
  41                 commit->buffer = NULL;
  42                 free_commit_list(commit->parents);
  43                 commit->parents = NULL;
  44         }
  45         return 0;
  46 }
  47
  48 int cmd_whatchanged(int argc, const char **argv, char **envp)
  49 {
  50         struct rev_info rev;
  51
  52         git_config(git_diff_ui_config);
  53         init_revisions(&rev);
  54         rev.diff = 1;
  55         rev.diffopt.recursive = 1;
  56         rev.simplify_history = 0;
  57         cmd_log_init(argc, argv, envp, &rev);
  58         if (!rev.diffopt.output_format)
  59                 rev.diffopt.output_format = DIFF_FORMAT_RAW;
  60         return cmd_log_walk(&rev);
  61 }
  62
  63 int cmd_show(int argc, const char **argv, char **envp)
  64 {
  65         struct rev_info rev;
  66
  67         git_config(git_diff_ui_config);
  68         init_revisions(&rev);
  69         rev.diff = 1;
  70         rev.diffopt.recursive = 1;
  71         rev.combine_merges = 1;
  72         rev.dense_combined_merges = 1;
  73         rev.always_show_header = 1;
  74         rev.ignore_merges = 0;
  75         rev.no_walk = 1;
  76         cmd_log_init(argc, argv, envp, &rev);
  77         return cmd_log_walk(&rev);
  78 }
  79
  80 int cmd_log(int argc, const char **argv, char **envp)
  81 {
  82         struct rev_info rev;
  83
  84         git_config(git_diff_ui_config);
  85         init_revisions(&rev);
  86         rev.always_show_header = 1;
  87         cmd_log_init(argc, argv, envp, &rev);
  88         return cmd_log_walk(&rev);
  89 }
  90
  91 static int istitlechar(char c)
  92 {
  93         return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') ||
  94                 (c >= '0' && c <= '9') || c == '.' || c == '_';
  95 }
  96
  97 static char *extra_headers = NULL;
  98 static int extra_headers_size = 0;
  99
 100 static int git_format_config(const char *var, const char *value)
 101 {
 102         if (!strcmp(var, "format.headers")) {
 103                 int len = strlen(value);
 104                 extra_headers_size += len + 1;
 105                 extra_headers = realloc(extra_headers, extra_headers_size);
 106                 extra_headers[extra_headers_size - len - 1] = 0;
 107                 strcat(extra_headers, value);
 108                 return 0;
 109         }
 110         if (!strcmp(var, "diff.color")) {
 111                 return 0;
 112         }
 113         return git_diff_ui_config(var, value);
 114 }
 115
 116
 117 static FILE *realstdout = NULL;
 118 static const char *output_directory = NULL;
 119
 120 static void reopen_stdout(struct commit *commit, int nr, int keep_subject)
 121 {
 122         char filename[1024];
 123         char *sol;
 124         int len = 0;
 125
 126         if (output_directory) {
 127                 strlcpy(filename, output_directory, 1010);
 128                 len = strlen(filename);
 129                 if (filename[len - 1] != '/')
 130                         filename[len++] = '/';
 131         }
 132
 133         sprintf(filename + len, "%04d", nr);
 134         len = strlen(filename);
 135
 136         sol = strstr(commit->buffer, "\n\n");
 137         if (sol) {
 138                 int j, space = 1;
 139
 140                 sol += 2;
 141                 /* strip [PATCH] or [PATCH blabla] */
 142                 if (!keep_subject && !strncmp(sol, "[PATCH", 6)) {
 143                         char *eos = strchr(sol + 6, ']');
 144                         if (eos) {
 145                                 while (isspace(*eos))
 146                                         eos++;
 147                                 sol = eos;
 148                         }
 149                 }
 150
 151                 for (j = 0; len < 1024 - 6 && sol[j] && sol[j] != '\n'; j++) {
 152                         if (istitlechar(sol[j])) {
 153                                 if (space) {
 154                                         filename[len++] = '-';
 155                                         space = 0;
 156                                 }
 157                                 filename[len++] = sol[j];
 158                                 if (sol[j] == '.')
 159                                         while (sol[j + 1] == '.')
 160                                                 j++;
 161                         } else
 162                                 space = 1;
 163                 }
 164                 while (filename[len - 1] == '.' || filename[len - 1] == '-')
 165                         len--;
 166         }
 167         strcpy(filename + len, ".txt");
 168         fprintf(realstdout, "%s\n", filename);
 169         freopen(filename, "w", stdout);
 170 }
 171
 172 static int get_patch_id(struct commit *commit, struct diff_options *options,
 173                 unsigned char *sha1)
 174 {
 175         diff_tree_sha1(commit->parents->item->object.sha1, commit->object.sha1,
 176                         "", options);
 177         diffcore_std(options);
 178         return diff_flush_patch_id(options, sha1);
 179 }
 180
 181 static void get_patch_ids(struct rev_info *rev, struct diff_options *options)
 182 {
 183         struct rev_info check_rev;
 184         struct commit *commit;
 185         struct object *o1, *o2;
 186         unsigned flags1, flags2;
 187         unsigned char sha1[20];
 188
 189         if (rev->pending.nr != 2)
 190                 die("Need exactly one range.");
 191
 192         o1 = rev->pending.objects[0].item;
 193         flags1 = o1->flags;
 194         o2 = rev->pending.objects[1].item;
 195         flags2 = o2->flags;
 196
 197         if ((flags1 & UNINTERESTING) == (flags2 & UNINTERESTING))
 198                 die("Not a range.");
 199
 200         diff_setup(options);
 201         options->recursive = 1;
 202         if (diff_setup_done(options) < 0)
 203                 die("diff_setup_done failed");
 204
 205         /* given a range a..b get all patch ids for b..a */
 206         init_revisions(&check_rev);
 207         o1->flags ^= UNINTERESTING;
 208         o2->flags ^= UNINTERESTING;
 209         add_pending_object(&check_rev, o1, "o1");
 210         add_pending_object(&check_rev, o2, "o2");
 211         prepare_revision_walk(&check_rev);
 212
 213         while ((commit = get_revision(&check_rev)) != NULL) {
 214                 /* ignore merges */
 215                 if (commit->parents && commit->parents->next)
 216                         continue;
 217
 218                 if (!get_patch_id(commit, options, sha1))
 219                         created_object(sha1, xcalloc(1, sizeof(struct object)));
 220         }
 221
 222         /* reset for next revision walk */
 223         clear_commit_marks((struct commit *)o1,
 224                         SEEN | UNINTERESTING | SHOWN | ADDED);
 225         clear_commit_marks((struct commit *)o2,
 226                         SEEN | UNINTERESTING | SHOWN | ADDED);
 227         o1->flags = flags1;
 228         o2->flags = flags2;
 229 }
 230
 231 static void gen_message_id(char *dest, unsigned int length, char *base)
 232 {
 233         const char *committer = git_committer_info(1);
 234         const char *email_start = strrchr(committer, '<');
 235         const char *email_end = strrchr(committer, '>');
 236         if(!email_start || !email_end || email_start > email_end - 1)
 237                 die("Could not extract email from committer identity.");
 238         snprintf(dest, length, "%s.%lu.git.%.*s", base,
 239                  (unsigned long) time(NULL),
 240                  (int)(email_end - email_start - 1), email_start + 1);
 241 }
 242
 243 int cmd_format_patch(int argc, const char **argv, char **envp)
 244 {
 245         struct commit *commit;
 246         struct commit **list = NULL;
 247         struct rev_info rev;
 248         int nr = 0, total, i, j;
 249         int use_stdout = 0;
 250         int numbered = 0;
 251         int start_number = -1;
 252         int keep_subject = 0;
 253         int ignore_if_in_upstream = 0;
 254         int thread = 0;
 255         const char *in_reply_to = NULL;
 256         struct diff_options patch_id_opts;
 257         char *add_signoff = NULL;
 258         char message_id[1024];
 259         char ref_message_id[1024];
 260
 261         git_config(git_format_config);
 262         init_revisions(&rev);
 263         rev.commit_format = CMIT_FMT_EMAIL;
 264         rev.verbose_header = 1;
 265         rev.diff = 1;
 266         rev.combine_merges = 0;
 267         rev.ignore_merges = 1;
 268         rev.diffopt.msg_sep = "";
 269         rev.diffopt.recursive = 1;
 270
 271         rev.extra_headers = extra_headers;
 272
 273         /*
 274          * Parse the arguments before setup_revisions(), or something
 275          * like "git fmt-patch -o a123 HEAD^.." may fail; a123 is
 276          * possibly a valid SHA1.
 277          */
 278         for (i = 1, j = 1; i < argc; i++) {
 279                 if (!strcmp(argv[i], "--stdout"))
 280                         use_stdout = 1;
 281                 else if (!strcmp(argv[i], "-n") ||
 282                                 !strcmp(argv[i], "--numbered"))
 283                         numbered = 1;
 284                 else if (!strncmp(argv[i], "--start-number=", 15))
 285                         start_number = strtol(argv[i] + 15, NULL, 10);
 286                 else if (!strcmp(argv[i], "--start-number")) {
 287                         i++;
 288                         if (i == argc)
 289                                 die("Need a number for --start-number");
 290                         start_number = strtol(argv[i], NULL, 10);
 291                 }
 292                 else if (!strcmp(argv[i], "-k") ||
 293                                 !strcmp(argv[i], "--keep-subject")) {
 294                         keep_subject = 1;
 295                         rev.total = -1;
 296                 }
 297                 else if (!strcmp(argv[i], "--output-directory") ||
 298                          !strcmp(argv[i], "-o")) {
 299                         i++;
 300                         if (argc <= i)
 301                                 die("Which directory?");
 302                         if (output_directory)
 303                                 die("Two output directories?");
 304                         output_directory = argv[i];
 305                 }
 306                 else if (!strcmp(argv[i], "--signoff") ||
 307                          !strcmp(argv[i], "-s")) {
 308                         const char *committer;
 309                         const char *endpos;
 310                         setup_ident();
 311                         committer = git_committer_info(1);
 312                         endpos = strchr(committer, '>');
 313                         if (!endpos)
 314                                 die("bogos committer info %s\n", committer);
 315                         add_signoff = xmalloc(endpos - committer + 2);
 316                         memcpy(add_signoff, committer, endpos - committer + 1);
 317                         add_signoff[endpos - committer + 1] = 0;
 318                 }
 319                 else if (!strcmp(argv[i], "--attach"))
 320                         rev.mime_boundary = git_version_string;
 321                 else if (!strncmp(argv[i], "--attach=", 9))
 322                         rev.mime_boundary = argv[i] + 9;
 323                 else if (!strcmp(argv[i], "--ignore-if-in-upstream"))
 324                         ignore_if_in_upstream = 1;
 325                 else if (!strcmp(argv[i], "--thread"))
 326                         thread = 1;
 327                 else if (!strncmp(argv[i], "--in-reply-to=", 14))
 328                         in_reply_to = argv[i] + 14;
 329                 else if (!strcmp(argv[i], "--in-reply-to")) {
 330                         i++;
 331                         if (i == argc)
 332                                 die("Need a Message-Id for --in-reply-to");
 333                         in_reply_to = argv[i];
 334                 }
 335                 else
 336                         argv[j++] = argv[i];
 337         }
 338         argc = j;
 339
 340         if (start_number < 0)
 341                 start_number = 1;
 342         if (numbered && keep_subject)
 343                 die ("-n and -k are mutually exclusive.");
 344
 345         argc = setup_revisions(argc, argv, &rev, "HEAD");
 346         if (argc > 1)
 347                 die ("unrecognized argument: %s", argv[1]);
 348
 349         if (!rev.diffopt.output_format)
 350                 rev.diffopt.output_format = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH;
 351
 352         if (output_directory) {
 353                 if (use_stdout)
 354                         die("standard output, or directory, which one?");
 355                 if (mkdir(output_directory, 0777) < 0 && errno != EEXIST)
 356                         die("Could not create directory %s",
 357                             output_directory);
 358         }
 359
 360         if (rev.pending.nr == 1) {
 361                 rev.pending.objects[0].item->flags |= UNINTERESTING;
 362                 add_head(&rev);
 363         }
 364
 365         if (ignore_if_in_upstream)
 366                 get_patch_ids(&rev, &patch_id_opts);
 367
 368         if (!use_stdout)
 369                 realstdout = fdopen(dup(1), "w");
 370
 371         prepare_revision_walk(&rev);
 372         while ((commit = get_revision(&rev)) != NULL) {
 373                 unsigned char sha1[20];
 374
 375                 /* ignore merges */
 376                 if (commit->parents && commit->parents->next)
 377                         continue;
 378
 379                 if (ignore_if_in_upstream &&
 380                                 !get_patch_id(commit, &patch_id_opts, sha1) &&
 381                                 lookup_object(sha1))
 382                         continue;
 383
 384                 nr++;
 385                 list = realloc(list, nr * sizeof(list[0]));
 386                 list[nr - 1] = commit;
 387         }
 388         total = nr;
 389         if (numbered)
 390                 rev.total = total + start_number - 1;
 391         rev.add_signoff = add_signoff;
 392         rev.ref_message_id = in_reply_to;
 393         while (0 <= --nr) {
 394                 int shown;
 395                 commit = list[nr];
 396                 rev.nr = total - nr + (start_number - 1);
 397                 /* Make the second and subsequent mails replies to the first */
 398                 if (thread) {
 399                         if (nr == (total - 2)) {
 400                                 strncpy(ref_message_id, message_id,
 401                                         sizeof(ref_message_id));
 402                                 ref_message_id[sizeof(ref_message_id)-1]='\0';
 403                                 rev.ref_message_id = ref_message_id;
 404                         }
 405                         gen_message_id(message_id, sizeof(message_id),
 406                                        sha1_to_hex(commit->object.sha1));
 407                         rev.message_id = message_id;
 408                 }
 409                 if (!use_stdout)
 410                         reopen_stdout(commit, rev.nr, keep_subject);
 411                 shown = log_tree_commit(&rev, commit);
 412                 free(commit->buffer);
 413                 commit->buffer = NULL;
 414
 415                 /* We put one extra blank line between formatted
 416                  * patches and this flag is used by log-tree code
 417                  * to see if it needs to emit a LF before showing
 418                  * the log; when using one file per patch, we do
 419                  * not want the extra blank line.
 420                  */
 421                 if (!use_stdout)
 422                         rev.shown_one = 0;
 423                 if (shown) {
 424                         if (rev.mime_boundary)
 425                                 printf("\n--%s%s--\n\n\n",
 426                                        mime_boundary_leader,
 427                                        rev.mime_boundary);
 428                         else
 429                                 printf("-- \n%s\n\n", git_version_string);
 430                 }
 431                 if (!use_stdout)
 432                         fclose(stdout);
 433         }
 434         free(list);
 435         return 0;
 436 }
 437