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_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_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_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         return git_diff_config(var, value);
 109 }
 110
 111
 112 static FILE *realstdout = NULL;
 113 static const char *output_directory = NULL;
 114
 115 static void reopen_stdout(struct commit *commit, int nr, int keep_subject)
 116 {
 117         char filename[1024];
 118         char *sol;
 119         int len = 0;
 120
 121         if (output_directory) {
 122                 strlcpy(filename, output_directory, 1010);
 123                 len = strlen(filename);
 124                 if (filename[len - 1] != '/')
 125                         filename[len++] = '/';
 126         }
 127
 128         sprintf(filename + len, "%04d", nr);
 129         len = strlen(filename);
 130
 131         sol = strstr(commit->buffer, "\n\n");
 132         if (sol) {
 133                 int j, space = 1;
 134
 135                 sol += 2;
 136                 /* strip [PATCH] or [PATCH blabla] */
 137                 if (!keep_subject && !strncmp(sol, "[PATCH", 6)) {
 138                         char *eos = strchr(sol + 6, ']');
 139                         if (eos) {
 140                                 while (isspace(*eos))
 141                                         eos++;
 142                                 sol = eos;
 143                         }
 144                 }
 145
 146                 for (j = 0; len < 1024 - 6 && sol[j] && sol[j] != '\n'; j++) {
 147                         if (istitlechar(sol[j])) {
 148                                 if (space) {
 149                                         filename[len++] = '-';
 150                                         space = 0;
 151                                 }
 152                                 filename[len++] = sol[j];
 153                                 if (sol[j] == '.')
 154                                         while (sol[j + 1] == '.')
 155                                                 j++;
 156                         } else
 157                                 space = 1;
 158                 }
 159                 while (filename[len - 1] == '.' || filename[len - 1] == '-')
 160                         len--;
 161         }
 162         strcpy(filename + len, ".txt");
 163         fprintf(realstdout, "%s\n", filename);
 164         freopen(filename, "w", stdout);
 165 }
 166
 167 static int get_patch_id(struct commit *commit, struct diff_options *options,
 168                 unsigned char *sha1)
 169 {
 170         diff_tree_sha1(commit->parents->item->object.sha1, commit->object.sha1,
 171                         "", options);
 172         diffcore_std(options);
 173         return diff_flush_patch_id(options, sha1);
 174 }
 175
 176 static void get_patch_ids(struct rev_info *rev, struct diff_options *options)
 177 {
 178         struct rev_info check_rev;
 179         struct commit *commit;
 180         struct object *o1, *o2;
 181         unsigned flags1, flags2;
 182         unsigned char sha1[20];
 183
 184         if (rev->pending.nr != 2)
 185                 die("Need exactly one range.");
 186
 187         o1 = rev->pending.objects[0].item;
 188         flags1 = o1->flags;
 189         o2 = rev->pending.objects[1].item;
 190         flags2 = o2->flags;
 191
 192         if ((flags1 & UNINTERESTING) == (flags2 & UNINTERESTING))
 193                 die("Not a range.");
 194
 195         diff_setup(options);
 196         options->recursive = 1;
 197         if (diff_setup_done(options) < 0)
 198                 die("diff_setup_done failed");
 199
 200         /* given a range a..b get all patch ids for b..a */
 201         init_revisions(&check_rev);
 202         o1->flags ^= UNINTERESTING;
 203         o2->flags ^= UNINTERESTING;
 204         add_pending_object(&check_rev, o1, "o1");
 205         add_pending_object(&check_rev, o2, "o2");
 206         prepare_revision_walk(&check_rev);
 207
 208         while ((commit = get_revision(&check_rev)) != NULL) {
 209                 /* ignore merges */
 210                 if (commit->parents && commit->parents->next)
 211                         continue;
 212
 213                 if (!get_patch_id(commit, options, sha1))
 214                         created_object(sha1, xcalloc(1, sizeof(struct object)));
 215         }
 216
 217         /* reset for next revision walk */
 218         clear_commit_marks((struct commit *)o1,
 219                         SEEN | UNINTERESTING | SHOWN | ADDED);
 220         clear_commit_marks((struct commit *)o2,
 221                         SEEN | UNINTERESTING | SHOWN | ADDED);
 222         o1->flags = flags1;
 223         o2->flags = flags2;
 224 }
 225
 226 int cmd_format_patch(int argc, const char **argv, char **envp)
 227 {
 228         struct commit *commit;
 229         struct commit **list = NULL;
 230         struct rev_info rev;
 231         int nr = 0, total, i, j;
 232         int use_stdout = 0;
 233         int numbered = 0;
 234         int start_number = -1;
 235         int keep_subject = 0;
 236         int ignore_if_in_upstream = 0;
 237         struct diff_options patch_id_opts;
 238         char *add_signoff = NULL;
 239
 240         git_config(git_format_config);
 241         init_revisions(&rev);
 242         rev.commit_format = CMIT_FMT_EMAIL;
 243         rev.verbose_header = 1;
 244         rev.diff = 1;
 245         rev.combine_merges = 0;
 246         rev.ignore_merges = 1;
 247         rev.diffopt.msg_sep = "";
 248         rev.diffopt.recursive = 1;
 249
 250         rev.extra_headers = extra_headers;
 251
 252         /*
 253          * Parse the arguments before setup_revisions(), or something
 254          * like "git fmt-patch -o a123 HEAD^.." may fail; a123 is
 255          * possibly a valid SHA1.
 256          */
 257         for (i = 1, j = 1; i < argc; i++) {
 258                 if (!strcmp(argv[i], "--stdout"))
 259                         use_stdout = 1;
 260                 else if (!strcmp(argv[i], "-n") ||
 261                                 !strcmp(argv[i], "--numbered"))
 262                         numbered = 1;
 263                 else if (!strncmp(argv[i], "--start-number=", 15))
 264                         start_number = strtol(argv[i] + 15, NULL, 10);
 265                 else if (!strcmp(argv[i], "--start-number")) {
 266                         i++;
 267                         if (i == argc)
 268                                 die("Need a number for --start-number");
 269                         start_number = strtol(argv[i], NULL, 10);
 270                 }
 271                 else if (!strcmp(argv[i], "-k") ||
 272                                 !strcmp(argv[i], "--keep-subject")) {
 273                         keep_subject = 1;
 274                         rev.total = -1;
 275                 }
 276                 else if (!strcmp(argv[i], "--output-directory") ||
 277                          !strcmp(argv[i], "-o")) {
 278                         i++;
 279                         if (argc <= i)
 280                                 die("Which directory?");
 281                         if (output_directory)
 282                                 die("Two output directories?");
 283                         output_directory = argv[i];
 284                 }
 285                 else if (!strcmp(argv[i], "--signoff") ||
 286                          !strcmp(argv[i], "-s")) {
 287                         const char *committer;
 288                         const char *endpos;
 289                         setup_ident();
 290                         committer = git_committer_info(1);
 291                         endpos = strchr(committer, '>');
 292                         if (!endpos)
 293                                 die("bogos committer info %s\n", committer);
 294                         add_signoff = xmalloc(endpos - committer + 2);
 295                         memcpy(add_signoff, committer, endpos - committer + 1);
 296                         add_signoff[endpos - committer + 1] = 0;
 297                 }
 298                 else if (!strcmp(argv[i], "--attach"))
 299                         rev.mime_boundary = git_version_string;
 300                 else if (!strncmp(argv[i], "--attach=", 9))
 301                         rev.mime_boundary = argv[i] + 9;
 302                 else if (!strcmp(argv[i], "--ignore-if-in-upstream"))
 303                         ignore_if_in_upstream = 1;
 304                 else
 305                         argv[j++] = argv[i];
 306         }
 307         argc = j;
 308
 309         if (start_number < 0)
 310                 start_number = 1;
 311         if (numbered && keep_subject)
 312                 die ("-n and -k are mutually exclusive.");
 313
 314         argc = setup_revisions(argc, argv, &rev, "HEAD");
 315         if (argc > 1)
 316                 die ("unrecognized argument: %s", argv[1]);
 317
 318         if (!rev.diffopt.output_format)
 319                 rev.diffopt.output_format = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH;
 320
 321         if (output_directory) {
 322                 if (use_stdout)
 323                         die("standard output, or directory, which one?");
 324                 if (mkdir(output_directory, 0777) < 0 && errno != EEXIST)
 325                         die("Could not create directory %s",
 326                             output_directory);
 327         }
 328
 329         if (rev.pending.nr == 1) {
 330                 rev.pending.objects[0].item->flags |= UNINTERESTING;
 331                 add_head(&rev);
 332         }
 333
 334         if (ignore_if_in_upstream)
 335                 get_patch_ids(&rev, &patch_id_opts);
 336
 337         if (!use_stdout)
 338                 realstdout = fdopen(dup(1), "w");
 339
 340         prepare_revision_walk(&rev);
 341         while ((commit = get_revision(&rev)) != NULL) {
 342                 unsigned char sha1[20];
 343
 344                 /* ignore merges */
 345                 if (commit->parents && commit->parents->next)
 346                         continue;
 347
 348                 if (ignore_if_in_upstream &&
 349                                 !get_patch_id(commit, &patch_id_opts, sha1) &&
 350                                 lookup_object(sha1))
 351                         continue;
 352
 353                 nr++;
 354                 list = realloc(list, nr * sizeof(list[0]));
 355                 list[nr - 1] = commit;
 356         }
 357         total = nr;
 358         if (numbered)
 359                 rev.total = total + start_number - 1;
 360         rev.add_signoff = add_signoff;
 361         while (0 <= --nr) {
 362                 int shown;
 363                 commit = list[nr];
 364                 rev.nr = total - nr + (start_number - 1);
 365                 if (!use_stdout)
 366                         reopen_stdout(commit, rev.nr, keep_subject);
 367                 shown = log_tree_commit(&rev, commit);
 368                 free(commit->buffer);
 369                 commit->buffer = NULL;
 370
 371                 /* We put one extra blank line between formatted
 372                  * patches and this flag is used by log-tree code
 373                  * to see if it needs to emit a LF before showing
 374                  * the log; when using one file per patch, we do
 375                  * not want the extra blank line.
 376                  */
 377                 if (!use_stdout)
 378                         rev.shown_one = 0;
 379                 if (shown) {
 380                         if (rev.mime_boundary)
 381                                 printf("\n--%s%s--\n\n\n",
 382                                        mime_boundary_leader,
 383                                        rev.mime_boundary);
 384                         else
 385                                 printf("-- \n%s\n\n", git_version_string);
 386                 }
 387                 if (!use_stdout)
 388                         fclose(stdout);
 389         }
 390         free(list);
 391         return 0;
 392 }
 393