builtin-add.c

   1 /*
   2  * "git add" builtin command
   3  *
   4  * Copyright (C) 2006 Linus Torvalds
   5  */
   6 #include "cache.h"
   7 #include "builtin.h"
   8 #include "dir.h"
   9 #include "exec_cmd.h"
  10 #include "cache-tree.h"
  11 #include "run-command.h"
  12 #include "parse-options.h"
  13 #include "diff.h"
  14 #include "diffcore.h"
  15 #include "revision.h"
  16
  17 static const char * const builtin_add_usage[] = {
  18         "git add [options] [--] <filepattern>...",
  19         NULL
  20 };
  21 static int patch_interactive, add_interactive, edit_interactive;
  22 static int take_worktree_changes;
  23
  24 struct update_callback_data
  25 {
  26         int flags;
  27         int add_errors;
  28 };
  29
  30 static void update_callback(struct diff_queue_struct *q,
  31                             struct diff_options *opt, void *cbdata)
  32 {
  33         int i;
  34         struct update_callback_data *data = cbdata;
  35
  36         for (i = 0; i < q->nr; i++) {
  37                 struct diff_filepair *p = q->queue[i];
  38                 const char *path = p->one->path;
  39                 switch (p->status) {
  40                 default:
  41                         die("unexpected diff status %c", p->status);
  42                 case DIFF_STATUS_UNMERGED:
  43                         /*
  44                          * ADD_CACHE_IGNORE_REMOVAL is unset if "git
  45                          * add -u" is calling us, In such a case, a
  46                          * missing work tree file needs to be removed
  47                          * if there is an unmerged entry at stage #2,
  48                          * but such a diff record is followed by
  49                          * another with DIFF_STATUS_DELETED (and if
  50                          * there is no stage #2, we won't see DELETED
  51                          * nor MODIFIED).  We can simply continue
  52                          * either way.
  53                          */
  54                         if (!(data->flags & ADD_CACHE_IGNORE_REMOVAL))
  55                                 continue;
  56                         /*
  57                          * Otherwise, it is "git add path" is asking
  58                          * to explicitly add it; we fall through.  A
  59                          * missing work tree file is an error and is
  60                          * caught by add_file_to_index() in such a
  61                          * case.
  62                          */
  63                 case DIFF_STATUS_MODIFIED:
  64                 case DIFF_STATUS_TYPE_CHANGED:
  65                         if (add_file_to_index(&the_index, path, data->flags)) {
  66                                 if (!(data->flags & ADD_CACHE_IGNORE_ERRORS))
  67                                         die("updating files failed");
  68                                 data->add_errors++;
  69                         }
  70                         break;
  71                 case DIFF_STATUS_DELETED:
  72                         if (data->flags & ADD_CACHE_IGNORE_REMOVAL)
  73                                 break;
  74                         if (!(data->flags & ADD_CACHE_PRETEND))
  75                                 remove_file_from_index(&the_index, path);
  76                         if (data->flags & (ADD_CACHE_PRETEND|ADD_CACHE_VERBOSE))
  77                                 printf("remove '%s'\n", path);
  78                         break;
  79                 }
  80         }
  81 }
  82
  83 int add_files_to_cache(const char *prefix, const char **pathspec, int flags)
  84 {
  85         struct update_callback_data data;
  86         struct rev_info rev;
  87         init_revisions(&rev, prefix);
  88         setup_revisions(0, NULL, &rev, NULL);
  89         rev.prune_data = pathspec;
  90         rev.diffopt.output_format = DIFF_FORMAT_CALLBACK;
  91         rev.diffopt.format_callback = update_callback;
  92         data.flags = flags;
  93         data.add_errors = 0;
  94         rev.diffopt.format_callback_data = &data;
  95         run_diff_files(&rev, DIFF_RACY_IS_MODIFIED);
  96         return !!data.add_errors;
  97 }
  98
  99 static void fill_pathspec_matches(const char **pathspec, char *seen, int specs)
 100 {
 101         int num_unmatched = 0, i;
 102
 103         /*
 104          * Since we are walking the index as if we were walking the directory,
 105          * we have to mark the matched pathspec as seen; otherwise we will
 106          * mistakenly think that the user gave a pathspec that did not match
 107          * anything.
 108          */
 109         for (i = 0; i < specs; i++)
 110                 if (!seen[i])
 111                         num_unmatched++;
 112         if (!num_unmatched)
 113                 return;
 114         for (i = 0; i < active_nr; i++) {
 115                 struct cache_entry *ce = active_cache[i];
 116                 match_pathspec(pathspec, ce->name, ce_namelen(ce), 0, seen);
 117         }
 118 }
 119
 120 static char *find_used_pathspec(const char **pathspec)
 121 {
 122         char *seen;
 123         int i;
 124
 125         for (i = 0; pathspec[i];  i++)
 126                 ; /* just counting */
 127         seen = xcalloc(i, 1);
 128         fill_pathspec_matches(pathspec, seen, i);
 129         return seen;
 130 }
 131
 132 static char *prune_directory(struct dir_struct *dir, const char **pathspec, int prefix)
 133 {
 134         char *seen;
 135         int i, specs;
 136         struct dir_entry **src, **dst;
 137
 138         for (specs = 0; pathspec[specs];  specs++)
 139                 /* nothing */;
 140         seen = xcalloc(specs, 1);
 141
 142         src = dst = dir->entries;
 143         i = dir->nr;
 144         while (--i >= 0) {
 145                 struct dir_entry *entry = *src++;
 146                 if (match_pathspec(pathspec, entry->name, entry->len,
 147                                    prefix, seen))
 148                         *dst++ = entry;
 149         }
 150         dir->nr = dst - dir->entries;
 151         fill_pathspec_matches(pathspec, seen, specs);
 152         return seen;
 153 }
 154
 155 static void treat_gitlinks(const char **pathspec)
 156 {
 157         int i;
 158
 159         if (!pathspec || !*pathspec)
 160                 return;
 161
 162         for (i = 0; i < active_nr; i++) {
 163                 struct cache_entry *ce = active_cache[i];
 164                 if (S_ISGITLINK(ce->ce_mode)) {
 165                         int len = ce_namelen(ce), j;
 166                         for (j = 0; pathspec[j]; j++) {
 167                                 int len2 = strlen(pathspec[j]);
 168                                 if (len2 <= len || pathspec[j][len] != '/' ||
 169                                     memcmp(ce->name, pathspec[j], len))
 170                                         continue;
 171                                 if (len2 == len + 1)
 172                                         /* strip trailing slash */
 173                                         pathspec[j] = xstrndup(ce->name, len);
 174                                 else
 175                                         die ("Path '%s' is in submodule '%.*s'",
 176                                                 pathspec[j], len, ce->name);
 177                         }
 178                 }
 179         }
 180 }
 181
 182 static void refresh(int verbose, const char **pathspec)
 183 {
 184         char *seen;
 185         int i, specs;
 186
 187         for (specs = 0; pathspec[specs];  specs++)
 188                 /* nothing */;
 189         seen = xcalloc(specs, 1);
 190         refresh_index(&the_index, verbose ? REFRESH_IN_PORCELAIN : REFRESH_QUIET,
 191                       pathspec, seen, "Unstaged changes after refreshing the index:");
 192         for (i = 0; i < specs; i++) {
 193                 if (!seen[i])
 194                         die("pathspec '%s' did not match any files", pathspec[i]);
 195         }
 196         free(seen);
 197 }
 198
 199 static const char **validate_pathspec(int argc, const char **argv, const char *prefix)
 200 {
 201         const char **pathspec = get_pathspec(prefix, argv);
 202
 203         if (pathspec) {
 204                 const char **p;
 205                 for (p = pathspec; *p; p++) {
 206                         if (has_symlink_leading_path(*p, strlen(*p))) {
 207                                 int len = prefix ? strlen(prefix) : 0;
 208                                 die("'%s' is beyond a symbolic link", *p + len);
 209                         }
 210                 }
 211         }
 212
 213         return pathspec;
 214 }
 215
 216 int run_add_interactive(const char *revision, const char *patch_mode,
 217                         const char **pathspec)
 218 {
 219         int status, ac, pc = 0;
 220         const char **args;
 221
 222         if (pathspec)
 223                 while (pathspec[pc])
 224                         pc++;
 225
 226         args = xcalloc(sizeof(const char *), (pc + 5));
 227         ac = 0;
 228         args[ac++] = "add--interactive";
 229         if (patch_mode)
 230                 args[ac++] = patch_mode;
 231         if (revision)
 232                 args[ac++] = revision;
 233         args[ac++] = "--";
 234         if (pc) {
 235                 memcpy(&(args[ac]), pathspec, sizeof(const char *) * pc);
 236                 ac += pc;
 237         }
 238         args[ac] = NULL;
 239
 240         status = run_command_v_opt(args, RUN_GIT_CMD);
 241         free(args);
 242         return status;
 243 }
 244
 245 int interactive_add(int argc, const char **argv, const char *prefix)
 246 {
 247         const char **pathspec = NULL;
 248
 249         if (argc) {
 250                 pathspec = validate_pathspec(argc, argv, prefix);
 251                 if (!pathspec)
 252                         return -1;
 253         }
 254
 255         return run_add_interactive(NULL,
 256                                    patch_interactive ? "--patch" : NULL,
 257                                    pathspec);
 258 }
 259
 260 static int edit_patch(int argc, const char **argv, const char *prefix)
 261 {
 262         char *file = xstrdup(git_path("ADD_EDIT.patch"));
 263         const char *apply_argv[] = { "apply", "--recount", "--cached",
 264                 file, NULL };
 265         struct child_process child;
 266         struct rev_info rev;
 267         int out;
 268         struct stat st;
 269
 270         git_config(git_diff_basic_config, NULL); /* no "diff" UI options */
 271
 272         if (read_cache() < 0)
 273                 die ("Could not read the index");
 274
 275         init_revisions(&rev, prefix);
 276         rev.diffopt.context = 7;
 277
 278         argc = setup_revisions(argc, argv, &rev, NULL);
 279         rev.diffopt.output_format = DIFF_FORMAT_PATCH;
 280         out = open(file, O_CREAT | O_WRONLY, 0644);
 281         if (out < 0)
 282                 die ("Could not open '%s' for writing.", file);
 283         rev.diffopt.file = xfdopen(out, "w");
 284         rev.diffopt.close_file = 1;
 285         if (run_diff_files(&rev, 0))
 286                 die ("Could not write patch");
 287
 288         launch_editor(file, NULL, NULL);
 289
 290         if (stat(file, &st))
 291                 die_errno("Could not stat '%s'", file);
 292         if (!st.st_size)
 293                 die("Empty patch. Aborted.");
 294
 295         memset(&child, 0, sizeof(child));
 296         child.git_cmd = 1;
 297         child.argv = apply_argv;
 298         if (run_command(&child))
 299                 die ("Could not apply '%s'", file);
 300
 301         unlink(file);
 302         return 0;
 303 }
 304
 305 static struct lock_file lock_file;
 306
 307 static const char ignore_error[] =
 308 "The following paths are ignored by one of your .gitignore files:\n";
 309
 310 static int verbose = 0, show_only = 0, ignored_too = 0, refresh_only = 0;
 311 static int ignore_add_errors, addremove, intent_to_add;
 312
 313 static struct option builtin_add_options[] = {
 314         OPT__DRY_RUN(&show_only),
 315         OPT__VERBOSE(&verbose),
 316         OPT_GROUP(""),
 317         OPT_BOOLEAN('i', "interactive", &add_interactive, "interactive picking"),
 318         OPT_BOOLEAN('p', "patch", &patch_interactive, "interactive patching"),
 319         OPT_BOOLEAN('e', "edit", &edit_interactive, "edit current diff and apply"),
 320         OPT_BOOLEAN('f', "force", &ignored_too, "allow adding otherwise ignored files"),
 321         OPT_BOOLEAN('u', "update", &take_worktree_changes, "update tracked files"),
 322         OPT_BOOLEAN('N', "intent-to-add", &intent_to_add, "record only the fact that the path will be added later"),
 323         OPT_BOOLEAN('A', "all", &addremove, "add all, noticing removal of tracked files"),
 324         OPT_BOOLEAN( 0 , "refresh", &refresh_only, "don't add, only refresh the index"),
 325         OPT_BOOLEAN( 0 , "ignore-errors", &ignore_add_errors, "just skip files which cannot be added because of errors"),
 326         OPT_END(),
 327 };
 328
 329 static int add_config(const char *var, const char *value, void *cb)
 330 {
 331         if (!strcasecmp(var, "add.ignore-errors")) {
 332                 ignore_add_errors = git_config_bool(var, value);
 333                 return 0;
 334         }
 335         return git_default_config(var, value, cb);
 336 }
 337
 338 static int add_files(struct dir_struct *dir, int flags)
 339 {
 340         int i, exit_status = 0;
 341
 342         if (dir->ignored_nr) {
 343                 fprintf(stderr, ignore_error);
 344                 for (i = 0; i < dir->ignored_nr; i++)
 345                         fprintf(stderr, "%s\n", dir->ignored[i]->name);
 346                 fprintf(stderr, "Use -f if you really want to add them.\n");
 347                 die("no files added");
 348         }
 349
 350         for (i = 0; i < dir->nr; i++)
 351                 if (add_file_to_cache(dir->entries[i]->name, flags)) {
 352                         if (!ignore_add_errors)
 353                                 die("adding files failed");
 354                         exit_status = 1;
 355                 }
 356         return exit_status;
 357 }
 358
 359 int cmd_add(int argc, const char **argv, const char *prefix)
 360 {
 361         int exit_status = 0;
 362         int newfd;
 363         const char **pathspec;
 364         struct dir_struct dir;
 365         int flags;
 366         int add_new_files;
 367         int require_pathspec;
 368         char *seen = NULL;
 369
 370         git_config(add_config, NULL);
 371
 372         argc = parse_options(argc, argv, prefix, builtin_add_options,
 373                           builtin_add_usage, PARSE_OPT_KEEP_ARGV0);
 374         if (patch_interactive)
 375                 add_interactive = 1;
 376         if (add_interactive)
 377                 exit(interactive_add(argc - 1, argv + 1, prefix));
 378
 379         if (edit_interactive)
 380                 return(edit_patch(argc, argv, prefix));
 381         argc--;
 382         argv++;
 383
 384         if (addremove && take_worktree_changes)
 385                 die("-A and -u are mutually incompatible");
 386         if ((addremove || take_worktree_changes) && !argc) {
 387                 static const char *here[2] = { ".", NULL };
 388                 argc = 1;
 389                 argv = here;
 390         }
 391
 392         add_new_files = !take_worktree_changes && !refresh_only;
 393         require_pathspec = !take_worktree_changes;
 394
 395         newfd = hold_locked_index(&lock_file, 1);
 396
 397         flags = ((verbose ? ADD_CACHE_VERBOSE : 0) |
 398                  (show_only ? ADD_CACHE_PRETEND : 0) |
 399                  (intent_to_add ? ADD_CACHE_INTENT : 0) |
 400                  (ignore_add_errors ? ADD_CACHE_IGNORE_ERRORS : 0) |
 401                  (!(addremove || take_worktree_changes)
 402                   ? ADD_CACHE_IGNORE_REMOVAL : 0));
 403
 404         if (require_pathspec && argc == 0) {
 405                 fprintf(stderr, "Nothing specified, nothing added.\n");
 406                 fprintf(stderr, "Maybe you wanted to say 'git add .'?\n");
 407                 return 0;
 408         }
 409         pathspec = validate_pathspec(argc, argv, prefix);
 410
 411         if (read_cache() < 0)
 412                 die("index file corrupt");
 413         treat_gitlinks(pathspec);
 414
 415         if (add_new_files) {
 416                 int baselen;
 417
 418                 /* Set up the default git porcelain excludes */
 419                 memset(&dir, 0, sizeof(dir));
 420                 if (!ignored_too) {
 421                         dir.flags |= DIR_COLLECT_IGNORED;
 422                         setup_standard_excludes(&dir);
 423                 }
 424
 425                 /* This picks up the paths that are not tracked */
 426                 baselen = fill_directory(&dir, pathspec);
 427                 if (pathspec)
 428                         seen = prune_directory(&dir, pathspec, baselen);
 429         }
 430
 431         if (refresh_only) {
 432                 refresh(verbose, pathspec);
 433                 goto finish;
 434         }
 435
 436         if (pathspec) {
 437                 int i;
 438                 if (!seen)
 439                         seen = find_used_pathspec(pathspec);
 440                 for (i = 0; pathspec[i]; i++) {
 441                         if (!seen[i] && pathspec[i][0]
 442                             && !file_exists(pathspec[i]))
 443                                 die("pathspec '%s' did not match any files",
 444                                     pathspec[i]);
 445                 }
 446                 free(seen);
 447         }
 448
 449         exit_status |= add_files_to_cache(prefix, pathspec, flags);
 450
 451         if (add_new_files)
 452                 exit_status |= add_files(&dir, flags);
 453
 454  finish:
 455         if (active_cache_changed) {
 456                 if (write_cache(newfd, active_cache, active_nr) ||
 457                     commit_locked_index(&lock_file))
 458                         die("Unable to write new index file");
 459         }
 460
 461         return exit_status;
 462 }