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