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 int cmd_log_wc(int argc, const char **argv, char **envp,
  18                       struct rev_info *rev)
  19 {
  20         struct commit *commit;
  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->always_show_header) {
  27                 if (rev->diffopt.pickaxe || rev->diffopt.filter) {
  28                         rev->always_show_header = 0;
  29                         if (rev->diffopt.output_format == DIFF_FORMAT_RAW)
  30                                 rev->diffopt.output_format = DIFF_FORMAT_NO_OUTPUT;
  31                 }
  32         }
  33
  34         if (argc > 1)
  35                 die("unrecognized argument: %s", argv[1]);
  36
  37         prepare_revision_walk(rev);
  38         setup_pager();
  39         while ((commit = get_revision(rev)) != NULL) {
  40                 log_tree_commit(rev, commit);
  41                 free(commit->buffer);
  42                 commit->buffer = NULL;
  43                 free_commit_list(commit->parents);
  44                 commit->parents = NULL;
  45         }
  46         return 0;
  47 }
  48
  49 int cmd_whatchanged(int argc, const char **argv, char **envp)
  50 {
  51         struct rev_info rev;
  52
  53         init_revisions(&rev);
  54         rev.diff = 1;
  55         rev.diffopt.recursive = 1;
  56         rev.simplify_history = 0;
  57         return cmd_log_wc(argc, argv, envp, &rev);
  58 }
  59
  60 int cmd_show(int argc, const char **argv, char **envp)
  61 {
  62         struct rev_info rev;
  63
  64         init_revisions(&rev);
  65         rev.diff = 1;
  66         rev.diffopt.recursive = 1;
  67         rev.combine_merges = 1;
  68         rev.dense_combined_merges = 1;
  69         rev.always_show_header = 1;
  70         rev.ignore_merges = 0;
  71         rev.no_walk = 1;
  72         return cmd_log_wc(argc, argv, envp, &rev);
  73 }
  74
  75 int cmd_log(int argc, const char **argv, char **envp)
  76 {
  77         struct rev_info rev;
  78
  79         init_revisions(&rev);
  80         rev.always_show_header = 1;
  81         rev.diffopt.recursive = 1;
  82         return cmd_log_wc(argc, argv, envp, &rev);
  83 }
  84
  85 static int istitlechar(char c)
  86 {
  87         return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') ||
  88                 (c >= '0' && c <= '9') || c == '.' || c == '_';
  89 }
  90
  91 static char *extra_headers = NULL;
  92 static int extra_headers_size = 0;
  93
  94 static int git_format_config(const char *var, const char *value)
  95 {
  96         if (!strcmp(var, "format.headers")) {
  97                 int len = strlen(value);
  98                 extra_headers_size += len + 1;
  99                 extra_headers = realloc(extra_headers, extra_headers_size);
 100                 extra_headers[extra_headers_size - len - 1] = 0;
 101                 strcat(extra_headers, value);
 102                 return 0;
 103         }
 104         return git_default_config(var, value);
 105 }
 106
 107
 108 static FILE *realstdout = NULL;
 109 static const char *output_directory = NULL;
 110
 111 static void reopen_stdout(struct commit *commit, int nr, int keep_subject)
 112 {
 113         char filename[1024];
 114         char *sol;
 115         int len = 0;
 116
 117         if (output_directory) {
 118                 strlcpy(filename, output_directory, 1010);
 119                 len = strlen(filename);
 120                 if (filename[len - 1] != '/')
 121                         filename[len++] = '/';
 122         }
 123
 124         sprintf(filename + len, "%04d", nr);
 125         len = strlen(filename);
 126
 127         sol = strstr(commit->buffer, "\n\n");
 128         if (sol) {
 129                 int j, space = 1;
 130
 131                 sol += 2;
 132                 /* strip [PATCH] or [PATCH blabla] */
 133                 if (!keep_subject && !strncmp(sol, "[PATCH", 6)) {
 134                         char *eos = strchr(sol + 6, ']');
 135                         if (eos) {
 136                                 while (isspace(*eos))
 137                                         eos++;
 138                                 sol = eos;
 139                         }
 140                 }
 141
 142                 for (j = 0; len < 1024 - 6 && sol[j] && sol[j] != '\n'; j++) {
 143                         if (istitlechar(sol[j])) {
 144                                 if (space) {
 145                                         filename[len++] = '-';
 146                                         space = 0;
 147                                 }
 148                                 filename[len++] = sol[j];
 149                                 if (sol[j] == '.')
 150                                         while (sol[j + 1] == '.')
 151                                                 j++;
 152                         } else
 153                                 space = 1;
 154                 }
 155                 while (filename[len - 1] == '.' || filename[len - 1] == '-')
 156                         len--;
 157         }
 158         strcpy(filename + len, ".txt");
 159         fprintf(realstdout, "%s\n", filename);
 160         freopen(filename, "w", stdout);
 161 }
 162
 163 static void reset_all_objects_flags()
 164 {
 165         int i;
 166
 167         for (i = 0; i < obj_allocs; i++)
 168                 if (objs[i])
 169                         objs[i]->flags = 0;
 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         reset_all_objects_flags();
 224         o1->flags = flags1;
 225         o2->flags = flags2;
 226 }
 227
 228 int cmd_format_patch(int argc, const char **argv, char **envp)
 229 {
 230         struct commit *commit;
 231         struct commit **list = NULL;
 232         struct rev_info rev;
 233         int nr = 0, total, i, j;
 234         int use_stdout = 0;
 235         int numbered = 0;
 236         int start_number = -1;
 237         int keep_subject = 0;
 238         int ignore_if_in_upstream = 0;
 239         struct diff_options patch_id_opts;
 240         char *add_signoff = NULL;
 241
 242         init_revisions(&rev);
 243         rev.commit_format = CMIT_FMT_EMAIL;
 244         rev.verbose_header = 1;
 245         rev.diff = 1;
 246         rev.diffopt.with_raw = 0;
 247         rev.diffopt.with_stat = 1;
 248         rev.combine_merges = 0;
 249         rev.ignore_merges = 1;
 250         rev.diffopt.output_format = DIFF_FORMAT_PATCH;
 251
 252         git_config(git_format_config);
 253         rev.extra_headers = extra_headers;
 254
 255         /*
 256          * Parse the arguments before setup_revisions(), or something
 257          * like "git fmt-patch -o a123 HEAD^.." may fail; a123 is
 258          * possibly a valid SHA1.
 259          */
 260         for (i = 1, j = 1; i < argc; i++) {
 261                 if (!strcmp(argv[i], "--stdout"))
 262                         use_stdout = 1;
 263                 else if (!strcmp(argv[i], "-n") ||
 264                                 !strcmp(argv[i], "--numbered"))
 265                         numbered = 1;
 266                 else if (!strncmp(argv[i], "--start-number=", 15))
 267                         start_number = strtol(argv[i] + 15, NULL, 10);
 268                 else if (!strcmp(argv[i], "--start-number")) {
 269                         i++;
 270                         if (i == argc)
 271                                 die("Need a number for --start-number");
 272                         start_number = strtol(argv[i], NULL, 10);
 273                 }
 274                 else if (!strcmp(argv[i], "-k") ||
 275                                 !strcmp(argv[i], "--keep-subject")) {
 276                         keep_subject = 1;
 277                         rev.total = -1;
 278                 }
 279                 else if (!strcmp(argv[i], "--output-directory") ||
 280                          !strcmp(argv[i], "-o")) {
 281                         i++;
 282                         if (argc <= i)
 283                                 die("Which directory?");
 284                         if (output_directory)
 285                                 die("Two output directories?");
 286                         output_directory = argv[i];
 287                 }
 288                 else if (!strcmp(argv[i], "--signoff") ||
 289                          !strcmp(argv[i], "-s")) {
 290                         const char *committer;
 291                         const char *endpos;
 292                         setup_ident();
 293                         committer = git_committer_info(1);
 294                         endpos = strchr(committer, '>');
 295                         if (!endpos)
 296                                 die("bogos committer info %s\n", committer);
 297                         add_signoff = xmalloc(endpos - committer + 2);
 298                         memcpy(add_signoff, committer, endpos - committer + 1);
 299                         add_signoff[endpos - committer + 1] = 0;
 300                 }
 301                 else if (!strcmp(argv[i], "--attach"))
 302                         rev.mime_boundary = git_version_string;
 303                 else if (!strncmp(argv[i], "--attach=", 9))
 304                         rev.mime_boundary = argv[i] + 9;
 305                 else if (!strcmp(argv[i], "--ignore-if-in-upstream"))
 306                         ignore_if_in_upstream = 1;
 307                 else
 308                         argv[j++] = argv[i];
 309         }
 310         argc = j;
 311
 312         if (start_number < 0)
 313                 start_number = 1;
 314         if (numbered && keep_subject)
 315                 die ("-n and -k are mutually exclusive.");
 316
 317         argc = setup_revisions(argc, argv, &rev, "HEAD");
 318         if (argc > 1)
 319                 die ("unrecognized argument: %s", argv[1]);
 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