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         init_revisions(&rev);
  53         git_config(git_diff_ui_config);
  54         diff_setup(&rev.diffopt);
  55         rev.diff = 1;
  56         rev.diffopt.recursive = 1;
  57         rev.simplify_history = 0;
  58         cmd_log_init(argc, argv, envp, &rev);
  59         if (!rev.diffopt.output_format)
  60                 rev.diffopt.output_format = DIFF_FORMAT_RAW;
  61         return cmd_log_walk(&rev);
  62 }
  63
  64 int cmd_show(int argc, const char **argv, char **envp)
  65 {
  66         struct rev_info rev;
  67
  68         init_revisions(&rev);
  69         git_config(git_diff_ui_config);
  70         diff_setup(&rev.diffopt);
  71         rev.diff = 1;
  72         rev.diffopt.recursive = 1;
  73         rev.combine_merges = 1;
  74         rev.dense_combined_merges = 1;
  75         rev.always_show_header = 1;
  76         rev.ignore_merges = 0;
  77         rev.no_walk = 1;
  78         cmd_log_init(argc, argv, envp, &rev);
  79         return cmd_log_walk(&rev);
  80 }
  81
  82 int cmd_log(int argc, const char **argv, char **envp)
  83 {
  84         struct rev_info rev;
  85
  86         init_revisions(&rev);
  87         git_config(git_diff_ui_config);
  88         diff_setup(&rev.diffopt);
  89         rev.always_show_header = 1;
  90         cmd_log_init(argc, argv, envp, &rev);
  91         return cmd_log_walk(&rev);
  92 }
  93
  94 static int istitlechar(char c)
  95 {
  96         return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') ||
  97                 (c >= '0' && c <= '9') || c == '.' || c == '_';
  98 }
  99
 100 static char *extra_headers = NULL;
 101 static int extra_headers_size = 0;
 102
 103 static int git_format_config(const char *var, const char *value)
 104 {
 105         if (!strcmp(var, "format.headers")) {
 106                 int len = strlen(value);
 107                 extra_headers_size += len + 1;
 108                 extra_headers = realloc(extra_headers, extra_headers_size);
 109                 extra_headers[extra_headers_size - len - 1] = 0;
 110                 strcat(extra_headers, value);
 111                 return 0;
 112         }
 113         if (!strcmp(var, "diff.color")) {
 114                 return 0;
 115         }
 116         return git_diff_ui_config(var, value);
 117 }
 118
 119
 120 static FILE *realstdout = NULL;
 121 static const char *output_directory = NULL;
 122
 123 static void reopen_stdout(struct commit *commit, int nr, int keep_subject)
 124 {
 125         char filename[1024];
 126         char *sol;
 127         int len = 0;
 128
 129         if (output_directory) {
 130                 strlcpy(filename, output_directory, 1010);
 131                 len = strlen(filename);
 132                 if (filename[len - 1] != '/')
 133                         filename[len++] = '/';
 134         }
 135
 136         sprintf(filename + len, "%04d", nr);
 137         len = strlen(filename);
 138
 139         sol = strstr(commit->buffer, "\n\n");
 140         if (sol) {
 141                 int j, space = 1;
 142
 143                 sol += 2;
 144                 /* strip [PATCH] or [PATCH blabla] */
 145                 if (!keep_subject && !strncmp(sol, "[PATCH", 6)) {
 146                         char *eos = strchr(sol + 6, ']');
 147                         if (eos) {
 148                                 while (isspace(*eos))
 149                                         eos++;
 150                                 sol = eos;
 151                         }
 152                 }
 153
 154                 for (j = 0; len < 1024 - 6 && sol[j] && sol[j] != '\n'; j++) {
 155                         if (istitlechar(sol[j])) {
 156                                 if (space) {
 157                                         filename[len++] = '-';
 158                                         space = 0;
 159                                 }
 160                                 filename[len++] = sol[j];
 161                                 if (sol[j] == '.')
 162                                         while (sol[j + 1] == '.')
 163                                                 j++;
 164                         } else
 165                                 space = 1;
 166                 }
 167                 while (filename[len - 1] == '.' || filename[len - 1] == '-')
 168                         len--;
 169         }
 170         strcpy(filename + len, ".txt");
 171         fprintf(realstdout, "%s\n", filename);
 172         freopen(filename, "w", stdout);
 173 }
 174
 175 static int get_patch_id(struct commit *commit, struct diff_options *options,
 176                 unsigned char *sha1)
 177 {
 178         diff_tree_sha1(commit->parents->item->object.sha1, commit->object.sha1,
 179                         "", options);
 180         diffcore_std(options);
 181         return diff_flush_patch_id(options, sha1);
 182 }
 183
 184 static void get_patch_ids(struct rev_info *rev, struct diff_options *options)
 185 {
 186         struct rev_info check_rev;
 187         struct commit *commit;
 188         struct object *o1, *o2;
 189         unsigned flags1, flags2;
 190         unsigned char sha1[20];
 191
 192         if (rev->pending.nr != 2)
 193                 die("Need exactly one range.");
 194
 195         o1 = rev->pending.objects[0].item;
 196         flags1 = o1->flags;
 197         o2 = rev->pending.objects[1].item;
 198         flags2 = o2->flags;
 199
 200         if ((flags1 & UNINTERESTING) == (flags2 & UNINTERESTING))
 201                 die("Not a range.");
 202
 203         diff_setup(options);
 204         options->recursive = 1;
 205         if (diff_setup_done(options) < 0)
 206                 die("diff_setup_done failed");
 207
 208         /* given a range a..b get all patch ids for b..a */
 209         init_revisions(&check_rev);
 210         o1->flags ^= UNINTERESTING;
 211         o2->flags ^= UNINTERESTING;
 212         add_pending_object(&check_rev, o1, "o1");
 213         add_pending_object(&check_rev, o2, "o2");
 214         prepare_revision_walk(&check_rev);
 215
 216         while ((commit = get_revision(&check_rev)) != NULL) {
 217                 /* ignore merges */
 218                 if (commit->parents && commit->parents->next)
 219                         continue;
 220
 221                 if (!get_patch_id(commit, options, sha1))
 222                         created_object(sha1, xcalloc(1, sizeof(struct object)));
 223         }
 224
 225         /* reset for next revision walk */
 226         clear_commit_marks((struct commit *)o1,
 227                         SEEN | UNINTERESTING | SHOWN | ADDED);
 228         clear_commit_marks((struct commit *)o2,
 229                         SEEN | UNINTERESTING | SHOWN | ADDED);
 230         o1->flags = flags1;
 231         o2->flags = flags2;
 232 }
 233
 234 static void gen_message_id(char *dest, unsigned int length, char *base)
 235 {
 236         const char *committer = git_committer_info(1);
 237         const char *email_start = strrchr(committer, '<');
 238         const char *email_end = strrchr(committer, '>');
 239         if(!email_start || !email_end || email_start > email_end - 1)
 240                 die("Could not extract email from committer identity.");
 241         snprintf(dest, length, "%s.%lu.git.%.*s", base,
 242                  (unsigned long) time(NULL),
 243                  (int)(email_end - email_start - 1), email_start + 1);
 244 }
 245
 246 int cmd_format_patch(int argc, const char **argv, char **envp)
 247 {
 248         struct commit *commit;
 249         struct commit **list = NULL;
 250         struct rev_info rev;
 251         int nr = 0, total, i, j;
 252         int use_stdout = 0;
 253         int numbered = 0;
 254         int start_number = -1;
 255         int keep_subject = 0;
 256         int ignore_if_in_upstream = 0;
 257         int thread = 0;
 258         const char *in_reply_to = NULL;
 259         struct diff_options patch_id_opts;
 260         char *add_signoff = NULL;
 261         char message_id[1024];
 262         char ref_message_id[1024];
 263
 264         git_config(git_format_config);
 265         init_revisions(&rev);
 266         rev.commit_format = CMIT_FMT_EMAIL;
 267         rev.verbose_header = 1;
 268         rev.diff = 1;
 269         rev.combine_merges = 0;
 270         rev.ignore_merges = 1;
 271         rev.diffopt.msg_sep = "";
 272         rev.diffopt.recursive = 1;
 273
 274         rev.extra_headers = extra_headers;
 275
 276         /*
 277          * Parse the arguments before setup_revisions(), or something
 278          * like "git fmt-patch -o a123 HEAD^.." may fail; a123 is
 279          * possibly a valid SHA1.
 280          */
 281         for (i = 1, j = 1; i < argc; i++) {
 282                 if (!strcmp(argv[i], "--stdout"))
 283                         use_stdout = 1;
 284                 else if (!strcmp(argv[i], "-n") ||
 285                                 !strcmp(argv[i], "--numbered"))
 286                         numbered = 1;
 287                 else if (!strncmp(argv[i], "--start-number=", 15))
 288                         start_number = strtol(argv[i] + 15, NULL, 10);
 289                 else if (!strcmp(argv[i], "--start-number")) {
 290                         i++;
 291                         if (i == argc)
 292                                 die("Need a number for --start-number");
 293                         start_number = strtol(argv[i], NULL, 10);
 294                 }
 295                 else if (!strcmp(argv[i], "-k") ||
 296                                 !strcmp(argv[i], "--keep-subject")) {
 297                         keep_subject = 1;
 298                         rev.total = -1;
 299                 }
 300                 else if (!strcmp(argv[i], "--output-directory") ||
 301                          !strcmp(argv[i], "-o")) {
 302                         i++;
 303                         if (argc <= i)
 304                                 die("Which directory?");
 305                         if (output_directory)
 306                                 die("Two output directories?");
 307                         output_directory = argv[i];
 308                 }
 309                 else if (!strcmp(argv[i], "--signoff") ||
 310                          !strcmp(argv[i], "-s")) {
 311                         const char *committer;
 312                         const char *endpos;
 313                         setup_ident();
 314                         committer = git_committer_info(1);
 315                         endpos = strchr(committer, '>');
 316                         if (!endpos)
 317                                 die("bogos committer info %s\n", committer);
 318                         add_signoff = xmalloc(endpos - committer + 2);
 319                         memcpy(add_signoff, committer, endpos - committer + 1);
 320                         add_signoff[endpos - committer + 1] = 0;
 321                 }
 322                 else if (!strcmp(argv[i], "--attach"))
 323                         rev.mime_boundary = git_version_string;
 324                 else if (!strncmp(argv[i], "--attach=", 9))
 325                         rev.mime_boundary = argv[i] + 9;
 326                 else if (!strcmp(argv[i], "--ignore-if-in-upstream"))
 327                         ignore_if_in_upstream = 1;
 328                 else if (!strcmp(argv[i], "--thread"))
 329                         thread = 1;
 330                 else if (!strncmp(argv[i], "--in-reply-to=", 14))
 331                         in_reply_to = argv[i] + 14;
 332                 else if (!strcmp(argv[i], "--in-reply-to")) {
 333                         i++;
 334                         if (i == argc)
 335                                 die("Need a Message-Id for --in-reply-to");
 336                         in_reply_to = argv[i];
 337                 }
 338                 else
 339                         argv[j++] = argv[i];
 340         }
 341         argc = j;
 342
 343         if (start_number < 0)
 344                 start_number = 1;
 345         if (numbered && keep_subject)
 346                 die ("-n and -k are mutually exclusive.");
 347
 348         argc = setup_revisions(argc, argv, &rev, "HEAD");
 349         if (argc > 1)
 350                 die ("unrecognized argument: %s", argv[1]);
 351
 352         if (!rev.diffopt.output_format)
 353                 rev.diffopt.output_format = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH;
 354
 355         if (output_directory) {
 356                 if (use_stdout)
 357                         die("standard output, or directory, which one?");
 358                 if (mkdir(output_directory, 0777) < 0 && errno != EEXIST)
 359                         die("Could not create directory %s",
 360                             output_directory);
 361         }
 362
 363         if (rev.pending.nr == 1) {
 364                 rev.pending.objects[0].item->flags |= UNINTERESTING;
 365                 add_head(&rev);
 366         }
 367
 368         if (ignore_if_in_upstream)
 369                 get_patch_ids(&rev, &patch_id_opts);
 370
 371         if (!use_stdout)
 372                 realstdout = fdopen(dup(1), "w");
 373
 374         prepare_revision_walk(&rev);
 375         while ((commit = get_revision(&rev)) != NULL) {
 376                 unsigned char sha1[20];
 377
 378                 /* ignore merges */
 379                 if (commit->parents && commit->parents->next)
 380                         continue;
 381
 382                 if (ignore_if_in_upstream &&
 383                                 !get_patch_id(commit, &patch_id_opts, sha1) &&
 384                                 lookup_object(sha1))
 385                         continue;
 386
 387                 nr++;
 388                 list = realloc(list, nr * sizeof(list[0]));
 389                 list[nr - 1] = commit;
 390         }
 391         total = nr;
 392         if (numbered)
 393                 rev.total = total + start_number - 1;
 394         rev.add_signoff = add_signoff;
 395         rev.ref_message_id = in_reply_to;
 396         while (0 <= --nr) {
 397                 int shown;
 398                 commit = list[nr];
 399                 rev.nr = total - nr + (start_number - 1);
 400                 /* Make the second and subsequent mails replies to the first */
 401                 if (thread) {
 402                         if (nr == (total - 2)) {
 403                                 strncpy(ref_message_id, message_id,
 404                                         sizeof(ref_message_id));
 405                                 ref_message_id[sizeof(ref_message_id)-1]='\0';
 406                                 rev.ref_message_id = ref_message_id;
 407                         }
 408                         gen_message_id(message_id, sizeof(message_id),
 409                                        sha1_to_hex(commit->object.sha1));
 410                         rev.message_id = message_id;
 411                 }
 412                 if (!use_stdout)
 413                         reopen_stdout(commit, rev.nr, keep_subject);
 414                 shown = log_tree_commit(&rev, commit);
 415                 free(commit->buffer);
 416                 commit->buffer = NULL;
 417
 418                 /* We put one extra blank line between formatted
 419                  * patches and this flag is used by log-tree code
 420                  * to see if it needs to emit a LF before showing
 421                  * the log; when using one file per patch, we do
 422                  * not want the extra blank line.
 423                  */
 424                 if (!use_stdout)
 425                         rev.shown_one = 0;
 426                 if (shown) {
 427                         if (rev.mime_boundary)
 428                                 printf("\n--%s%s--\n\n\n",
 429                                        mime_boundary_leader,
 430                                        rev.mime_boundary);
 431                         else
 432                                 printf("-- \n%s\n\n", git_version_string);
 433                 }
 434                 if (!use_stdout)
 435                         fclose(stdout);
 436         }
 437         free(list);
 438         return 0;
 439 }
 440