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         init_revisions(&rev);
  51         rev.diff = 1;
  52         rev.diffopt.recursive = 1;
  53         rev.simplify_history = 0;
  54         cmd_log_init(argc, argv, envp, &rev);
  55         if (!rev.diffopt.output_format)
  56                 rev.diffopt.output_format = DIFF_FORMAT_RAW;
  57         return cmd_log_walk(&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         cmd_log_init(argc, argv, envp, &rev);
  73         return cmd_log_walk(&rev);
  74 }
  75
  76 int cmd_log(int argc, const char **argv, char **envp)
  77 {
  78         struct rev_info rev;
  79
  80         init_revisions(&rev);
  81         rev.always_show_header = 1;
  82         cmd_log_init(argc, argv, envp, &rev);
  83         return cmd_log_walk(&rev);
  84 }
  85
  86 static int istitlechar(char c)
  87 {
  88         return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') ||
  89                 (c >= '0' && c <= '9') || c == '.' || c == '_';
  90 }
  91
  92 static char *extra_headers = NULL;
  93 static int extra_headers_size = 0;
  94
  95 static int git_format_config(const char *var, const char *value)
  96 {
  97         if (!strcmp(var, "format.headers")) {
  98                 int len = strlen(value);
  99                 extra_headers_size += len + 1;
 100                 extra_headers = realloc(extra_headers, extra_headers_size);
 101                 extra_headers[extra_headers_size - len - 1] = 0;
 102                 strcat(extra_headers, value);
 103                 return 0;
 104         }
 105         return git_default_config(var, value);
 106 }
 107
 108
 109 static FILE *realstdout = NULL;
 110 static const char *output_directory = NULL;
 111
 112 static void reopen_stdout(struct commit *commit, int nr, int keep_subject)
 113 {
 114         char filename[1024];
 115         char *sol;
 116         int len = 0;
 117
 118         if (output_directory) {
 119                 strlcpy(filename, output_directory, 1010);
 120                 len = strlen(filename);
 121                 if (filename[len - 1] != '/')
 122                         filename[len++] = '/';
 123         }
 124
 125         sprintf(filename + len, "%04d", nr);
 126         len = strlen(filename);
 127
 128         sol = strstr(commit->buffer, "\n\n");
 129         if (sol) {
 130                 int j, space = 1;
 131
 132                 sol += 2;
 133                 /* strip [PATCH] or [PATCH blabla] */
 134                 if (!keep_subject && !strncmp(sol, "[PATCH", 6)) {
 135                         char *eos = strchr(sol + 6, ']');
 136                         if (eos) {
 137                                 while (isspace(*eos))
 138                                         eos++;
 139                                 sol = eos;
 140                         }
 141                 }
 142
 143                 for (j = 0; len < 1024 - 6 && sol[j] && sol[j] != '\n'; j++) {
 144                         if (istitlechar(sol[j])) {
 145                                 if (space) {
 146                                         filename[len++] = '-';
 147                                         space = 0;
 148                                 }
 149                                 filename[len++] = sol[j];
 150                                 if (sol[j] == '.')
 151                                         while (sol[j + 1] == '.')
 152                                                 j++;
 153                         } else
 154                                 space = 1;
 155                 }
 156                 while (filename[len - 1] == '.' || filename[len - 1] == '-')
 157                         len--;
 158         }
 159         strcpy(filename + len, ".txt");
 160         fprintf(realstdout, "%s\n", filename);
 161         freopen(filename, "w", stdout);
 162 }
 163
 164 static int get_patch_id(struct commit *commit, struct diff_options *options,
 165                 unsigned char *sha1)
 166 {
 167         diff_tree_sha1(commit->parents->item->object.sha1, commit->object.sha1,
 168                         "", options);
 169         diffcore_std(options);
 170         return diff_flush_patch_id(options, sha1);
 171 }
 172
 173 static void get_patch_ids(struct rev_info *rev, struct diff_options *options)
 174 {
 175         struct rev_info check_rev;
 176         struct commit *commit;
 177         struct object *o1, *o2;
 178         unsigned flags1, flags2;
 179         unsigned char sha1[20];
 180
 181         if (rev->pending.nr != 2)
 182                 die("Need exactly one range.");
 183
 184         o1 = rev->pending.objects[0].item;
 185         flags1 = o1->flags;
 186         o2 = rev->pending.objects[1].item;
 187         flags2 = o2->flags;
 188
 189         if ((flags1 & UNINTERESTING) == (flags2 & UNINTERESTING))
 190                 die("Not a range.");
 191
 192         diff_setup(options);
 193         options->recursive = 1;
 194         if (diff_setup_done(options) < 0)
 195                 die("diff_setup_done failed");
 196
 197         /* given a range a..b get all patch ids for b..a */
 198         init_revisions(&check_rev);
 199         o1->flags ^= UNINTERESTING;
 200         o2->flags ^= UNINTERESTING;
 201         add_pending_object(&check_rev, o1, "o1");
 202         add_pending_object(&check_rev, o2, "o2");
 203         prepare_revision_walk(&check_rev);
 204
 205         while ((commit = get_revision(&check_rev)) != NULL) {
 206                 /* ignore merges */
 207                 if (commit->parents && commit->parents->next)
 208                         continue;
 209
 210                 if (!get_patch_id(commit, options, sha1))
 211                         created_object(sha1, xcalloc(1, sizeof(struct object)));
 212         }
 213
 214         /* reset for next revision walk */
 215         clear_commit_marks((struct commit *)o1,
 216                         SEEN | UNINTERESTING | SHOWN | ADDED);
 217         clear_commit_marks((struct commit *)o2,
 218                         SEEN | UNINTERESTING | SHOWN | ADDED);
 219         o1->flags = flags1;
 220         o2->flags = flags2;
 221 }
 222
 223 int cmd_format_patch(int argc, const char **argv, char **envp)
 224 {
 225         struct commit *commit;
 226         struct commit **list = NULL;
 227         struct rev_info rev;
 228         int nr = 0, total, i, j;
 229         int use_stdout = 0;
 230         int numbered = 0;
 231         int start_number = -1;
 232         int keep_subject = 0;
 233         int ignore_if_in_upstream = 0;
 234         struct diff_options patch_id_opts;
 235         char *add_signoff = NULL;
 236
 237         init_revisions(&rev);
 238         rev.commit_format = CMIT_FMT_EMAIL;
 239         rev.verbose_header = 1;
 240         rev.diff = 1;
 241         rev.combine_merges = 0;
 242         rev.ignore_merges = 1;
 243         rev.diffopt.msg_sep = "";
 244         rev.diffopt.recursive = 1;
 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 (!rev.diffopt.output_format)
 316                 rev.diffopt.output_format = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH;
 317
 318         if (output_directory) {
 319                 if (use_stdout)
 320                         die("standard output, or directory, which one?");
 321                 if (mkdir(output_directory, 0777) < 0 && errno != EEXIST)
 322                         die("Could not create directory %s",
 323                             output_directory);
 324         }
 325
 326         if (rev.pending.nr == 1) {
 327                 rev.pending.objects[0].item->flags |= UNINTERESTING;
 328                 add_head(&rev);
 329         }
 330
 331         if (ignore_if_in_upstream)
 332                 get_patch_ids(&rev, &patch_id_opts);
 333
 334         if (!use_stdout)
 335                 realstdout = fdopen(dup(1), "w");
 336
 337         prepare_revision_walk(&rev);
 338         while ((commit = get_revision(&rev)) != NULL) {
 339                 unsigned char sha1[20];
 340
 341                 /* ignore merges */
 342                 if (commit->parents && commit->parents->next)
 343                         continue;
 344
 345                 if (ignore_if_in_upstream &&
 346                                 !get_patch_id(commit, &patch_id_opts, sha1) &&
 347                                 lookup_object(sha1))
 348                         continue;
 349
 350                 nr++;
 351                 list = realloc(list, nr * sizeof(list[0]));
 352                 list[nr - 1] = commit;
 353         }
 354         total = nr;
 355         if (numbered)
 356                 rev.total = total + start_number - 1;
 357         rev.add_signoff = add_signoff;
 358         while (0 <= --nr) {
 359                 int shown;
 360                 commit = list[nr];
 361                 rev.nr = total - nr + (start_number - 1);
 362                 if (!use_stdout)
 363                         reopen_stdout(commit, rev.nr, keep_subject);
 364                 shown = log_tree_commit(&rev, commit);
 365                 free(commit->buffer);
 366                 commit->buffer = NULL;
 367
 368                 /* We put one extra blank line between formatted
 369                  * patches and this flag is used by log-tree code
 370                  * to see if it needs to emit a LF before showing
 371                  * the log; when using one file per patch, we do
 372                  * not want the extra blank line.
 373                  */
 374                 if (!use_stdout)
 375                         rev.shown_one = 0;
 376                 if (shown) {
 377                         if (rev.mime_boundary)
 378                                 printf("\n--%s%s--\n\n\n",
 379                                        mime_boundary_leader,
 380                                        rev.mime_boundary);
 381                         else
 382                                 printf("-- \n%s\n\n", git_version_string);
 383                 }
 384                 if (!use_stdout)
 385                         fclose(stdout);
 386         }
 387         free(list);
 388         return 0;
 389 }
 390