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   1 /*
   2  * "git add" builtin command
   3  *
   4  * Copyright (C) 2006 Linus Torvalds
   5  */
   6 #include "cache.h"
   7 #include "config.h"
   8 #include "builtin.h"
   9 #include "lockfile.h"
  10 #include "dir.h"
  11 #include "pathspec.h"
  12 #include "exec-cmd.h"
  13 #include "cache-tree.h"
  14 #include "run-command.h"
  15 #include "parse-options.h"
  16 #include "diff.h"
  17 #include "diffcore.h"
  18 #include "revision.h"
  19 #include "bulk-checkin.h"
  20 #include "argv-array.h"
  21 #include "submodule.h"
  22
  23 static const char * const builtin_add_usage[] = {
  24         N_("git add [<options>] [--] <pathspec>..."),
  25         NULL
  26 };
  27 static int patch_interactive, add_interactive, edit_interactive;
  28 static int take_worktree_changes;
  29 static int add_renormalize;
  30
  31 struct update_callback_data {
  32         int flags;
  33         int add_errors;
  34 };
  35
  36 static void chmod_pathspec(struct pathspec *pathspec, char flip)
  37 {
  38         int i;
  39
  40         for (i = 0; i < active_nr; i++) {
  41                 struct cache_entry *ce = active_cache[i];
  42
  43                 if (pathspec && !ce_path_match(&the_index, ce, pathspec, NULL))
  44                         continue;
  45
  46                 if (chmod_cache_entry(ce, flip) < 0)
  47                         fprintf(stderr, "cannot chmod %cx '%s'\n", flip, ce->name);
  48         }
  49 }
  50
  51 static int fix_unmerged_status(struct diff_filepair *p,
  52                                struct update_callback_data *data)
  53 {
  54         if (p->status != DIFF_STATUS_UNMERGED)
  55                 return p->status;
  56         if (!(data->flags & ADD_CACHE_IGNORE_REMOVAL) && !p->two->mode)
  57                 /*
  58                  * This is not an explicit add request, and the
  59                  * path is missing from the working tree (deleted)
  60                  */
  61                 return DIFF_STATUS_DELETED;
  62         else
  63                 /*
  64                  * Either an explicit add request, or path exists
  65                  * in the working tree.  An attempt to explicitly
  66                  * add a path that does not exist in the working tree
  67                  * will be caught as an error by the caller immediately.
  68                  */
  69                 return DIFF_STATUS_MODIFIED;
  70 }
  71
  72 static void update_callback(struct diff_queue_struct *q,
  73                             struct diff_options *opt, void *cbdata)
  74 {
  75         int i;
  76         struct update_callback_data *data = cbdata;
  77
  78         for (i = 0; i < q->nr; i++) {
  79                 struct diff_filepair *p = q->queue[i];
  80                 const char *path = p->one->path;
  81                 switch (fix_unmerged_status(p, data)) {
  82                 default:
  83                         die(_("unexpected diff status %c"), p->status);
  84                 case DIFF_STATUS_MODIFIED:
  85                 case DIFF_STATUS_TYPE_CHANGED:
  86                         if (add_file_to_index(&the_index, path, data->flags)) {
  87                                 if (!(data->flags & ADD_CACHE_IGNORE_ERRORS))
  88                                         die(_("updating files failed"));
  89                                 data->add_errors++;
  90                         }
  91                         break;
  92                 case DIFF_STATUS_DELETED:
  93                         if (data->flags & ADD_CACHE_IGNORE_REMOVAL)
  94                                 break;
  95                         if (!(data->flags & ADD_CACHE_PRETEND))
  96                                 remove_file_from_index(&the_index, path);
  97                         if (data->flags & (ADD_CACHE_PRETEND|ADD_CACHE_VERBOSE))
  98                                 printf(_("remove '%s'\n"), path);
  99                         break;
 100                 }
 101         }
 102 }
 103
 104 int add_files_to_cache(const char *prefix,
 105                        const struct pathspec *pathspec, int flags)
 106 {
 107         struct update_callback_data data;
 108         struct rev_info rev;
 109
 110         memset(&data, 0, sizeof(data));
 111         data.flags = flags;
 112
 113         repo_init_revisions(the_repository, &rev, prefix);
 114         setup_revisions(0, NULL, &rev, NULL);
 115         if (pathspec)
 116                 copy_pathspec(&rev.prune_data, pathspec);
 117         rev.diffopt.output_format = DIFF_FORMAT_CALLBACK;
 118         rev.diffopt.format_callback = update_callback;
 119         rev.diffopt.format_callback_data = &data;
 120         rev.diffopt.flags.override_submodule_config = 1;
 121         rev.max_count = 0; /* do not compare unmerged paths with stage #2 */
 122         run_diff_files(&rev, DIFF_RACY_IS_MODIFIED);
 123         clear_pathspec(&rev.prune_data);
 124         return !!data.add_errors;
 125 }
 126
 127 static int renormalize_tracked_files(const struct pathspec *pathspec, int flags)
 128 {
 129         int i, retval = 0;
 130
 131         for (i = 0; i < active_nr; i++) {
 132                 struct cache_entry *ce = active_cache[i];
 133
 134                 if (ce_stage(ce))
 135                         continue; /* do not touch unmerged paths */
 136                 if (!S_ISREG(ce->ce_mode) && !S_ISLNK(ce->ce_mode))
 137                         continue; /* do not touch non blobs */
 138                 if (pathspec && !ce_path_match(&the_index, ce, pathspec, NULL))
 139                         continue;
 140                 retval |= add_file_to_cache(ce->name, flags | ADD_CACHE_RENORMALIZE);
 141         }
 142
 143         return retval;
 144 }
 145
 146 static char *prune_directory(struct dir_struct *dir, struct pathspec *pathspec, int prefix)
 147 {
 148         char *seen;
 149         int i;
 150         struct dir_entry **src, **dst;
 151
 152         seen = xcalloc(pathspec->nr, 1);
 153
 154         src = dst = dir->entries;
 155         i = dir->nr;
 156         while (--i >= 0) {
 157                 struct dir_entry *entry = *src++;
 158                 if (dir_path_match(&the_index, entry, pathspec, prefix, seen))
 159                         *dst++ = entry;
 160         }
 161         dir->nr = dst - dir->entries;
 162         add_pathspec_matches_against_index(pathspec, &the_index, seen);
 163         return seen;
 164 }
 165
 166 static void refresh(int verbose, const struct pathspec *pathspec)
 167 {
 168         char *seen;
 169         int i;
 170
 171         seen = xcalloc(pathspec->nr, 1);
 172         refresh_index(&the_index, verbose ? REFRESH_IN_PORCELAIN : REFRESH_QUIET,
 173                       pathspec, seen, _("Unstaged changes after refreshing the index:"));
 174         for (i = 0; i < pathspec->nr; i++) {
 175                 if (!seen[i])
 176                         die(_("pathspec '%s' did not match any files"),
 177                             pathspec->items[i].match);
 178         }
 179         free(seen);
 180 }
 181
 182 int run_add_interactive(const char *revision, const char *patch_mode,
 183                         const struct pathspec *pathspec)
 184 {
 185         int status, i;
 186         struct argv_array argv = ARGV_ARRAY_INIT;
 187
 188         argv_array_push(&argv, "add--interactive");
 189         if (patch_mode)
 190                 argv_array_push(&argv, patch_mode);
 191         if (revision)
 192                 argv_array_push(&argv, revision);
 193         argv_array_push(&argv, "--");
 194         for (i = 0; i < pathspec->nr; i++)
 195                 /* pass original pathspec, to be re-parsed */
 196                 argv_array_push(&argv, pathspec->items[i].original);
 197
 198         status = run_command_v_opt(argv.argv, RUN_GIT_CMD);
 199         argv_array_clear(&argv);
 200         return status;
 201 }
 202
 203 int interactive_add(int argc, const char **argv, const char *prefix, int patch)
 204 {
 205         struct pathspec pathspec;
 206
 207         parse_pathspec(&pathspec, 0,
 208                        PATHSPEC_PREFER_FULL |
 209                        PATHSPEC_SYMLINK_LEADING_PATH |
 210                        PATHSPEC_PREFIX_ORIGIN,
 211                        prefix, argv);
 212
 213         return run_add_interactive(NULL,
 214                                    patch ? "--patch" : NULL,
 215                                    &pathspec);
 216 }
 217
 218 static int edit_patch(int argc, const char **argv, const char *prefix)
 219 {
 220         char *file = git_pathdup("ADD_EDIT.patch");
 221         const char *apply_argv[] = { "apply", "--recount", "--cached",
 222                 NULL, NULL };
 223         struct child_process child = CHILD_PROCESS_INIT;
 224         struct rev_info rev;
 225         int out;
 226         struct stat st;
 227
 228         apply_argv[3] = file;
 229
 230         git_config(git_diff_basic_config, NULL); /* no "diff" UI options */
 231
 232         if (read_cache() < 0)
 233                 die(_("Could not read the index"));
 234
 235         repo_init_revisions(the_repository, &rev, prefix);
 236         rev.diffopt.context = 7;
 237
 238         argc = setup_revisions(argc, argv, &rev, NULL);
 239         rev.diffopt.output_format = DIFF_FORMAT_PATCH;
 240         rev.diffopt.use_color = 0;
 241         rev.diffopt.flags.ignore_dirty_submodules = 1;
 242         out = open(file, O_CREAT | O_WRONLY | O_TRUNC, 0666);
 243         if (out < 0)
 244                 die(_("Could not open '%s' for writing."), file);
 245         rev.diffopt.file = xfdopen(out, "w");
 246         rev.diffopt.close_file = 1;
 247         if (run_diff_files(&rev, 0))
 248                 die(_("Could not write patch"));
 249
 250         if (launch_editor(file, NULL, NULL))
 251                 die(_("editing patch failed"));
 252
 253         if (stat(file, &st))
 254                 die_errno(_("Could not stat '%s'"), file);
 255         if (!st.st_size)
 256                 die(_("Empty patch. Aborted."));
 257
 258         child.git_cmd = 1;
 259         child.argv = apply_argv;
 260         if (run_command(&child))
 261                 die(_("Could not apply '%s'"), file);
 262
 263         unlink(file);
 264         free(file);
 265         return 0;
 266 }
 267
 268 static const char ignore_error[] =
 269 N_("The following paths are ignored by one of your .gitignore files:\n");
 270
 271 static int verbose, show_only, ignored_too, refresh_only;
 272 static int ignore_add_errors, intent_to_add, ignore_missing;
 273 static int warn_on_embedded_repo = 1;
 274
 275 #define ADDREMOVE_DEFAULT 1
 276 static int addremove = ADDREMOVE_DEFAULT;
 277 static int addremove_explicit = -1; /* unspecified */
 278
 279 static char *chmod_arg;
 280
 281 static int ignore_removal_cb(const struct option *opt, const char *arg, int unset)
 282 {
 283         /* if we are told to ignore, we are not adding removals */
 284         *(int *)opt->value = !unset ? 0 : 1;
 285         return 0;
 286 }
 287
 288 static struct option builtin_add_options[] = {
 289         OPT__DRY_RUN(&show_only, N_("dry run")),
 290         OPT__VERBOSE(&verbose, N_("be verbose")),
 291         OPT_GROUP(""),
 292         OPT_BOOL('i', "interactive", &add_interactive, N_("interactive picking")),
 293         OPT_BOOL('p', "patch", &patch_interactive, N_("select hunks interactively")),
 294         OPT_BOOL('e', "edit", &edit_interactive, N_("edit current diff and apply")),
 295         OPT__FORCE(&ignored_too, N_("allow adding otherwise ignored files"), 0),
 296         OPT_BOOL('u', "update", &take_worktree_changes, N_("update tracked files")),
 297         OPT_BOOL(0, "renormalize", &add_renormalize, N_("renormalize EOL of tracked files (implies -u)")),
 298         OPT_BOOL('N', "intent-to-add", &intent_to_add, N_("record only the fact that the path will be added later")),
 299         OPT_BOOL('A', "all", &addremove_explicit, N_("add changes from all tracked and untracked files")),
 300         { OPTION_CALLBACK, 0, "ignore-removal", &addremove_explicit,
 301           NULL /* takes no arguments */,
 302           N_("ignore paths removed in the working tree (same as --no-all)"),
 303           PARSE_OPT_NOARG, ignore_removal_cb },
 304         OPT_BOOL( 0 , "refresh", &refresh_only, N_("don't add, only refresh the index")),
 305         OPT_BOOL( 0 , "ignore-errors", &ignore_add_errors, N_("just skip files which cannot be added because of errors")),
 306         OPT_BOOL( 0 , "ignore-missing", &ignore_missing, N_("check if - even missing - files are ignored in dry run")),
 307         OPT_STRING(0, "chmod", &chmod_arg, "(+|-)x",
 308                    N_("override the executable bit of the listed files")),
 309         OPT_HIDDEN_BOOL(0, "warn-embedded-repo", &warn_on_embedded_repo,
 310                         N_("warn when adding an embedded repository")),
 311         OPT_END(),
 312 };
 313
 314 static int add_config(const char *var, const char *value, void *cb)
 315 {
 316         if (!strcmp(var, "add.ignoreerrors") ||
 317             !strcmp(var, "add.ignore-errors")) {
 318                 ignore_add_errors = git_config_bool(var, value);
 319                 return 0;
 320         }
 321         return git_default_config(var, value, cb);
 322 }
 323
 324 static const char embedded_advice[] = N_(
 325 "You've added another git repository inside your current repository.\n"
 326 "Clones of the outer repository will not contain the contents of\n"
 327 "the embedded repository and will not know how to obtain it.\n"
 328 "If you meant to add a submodule, use:\n"
 329 "\n"
 330 "       git submodule add <url> %s\n"
 331 "\n"
 332 "If you added this path by mistake, you can remove it from the\n"
 333 "index with:\n"
 334 "\n"
 335 "       git rm --cached %s\n"
 336 "\n"
 337 "See \"git help submodule\" for more information."
 338 );
 339
 340 static void check_embedded_repo(const char *path)
 341 {
 342         struct strbuf name = STRBUF_INIT;
 343
 344         if (!warn_on_embedded_repo)
 345                 return;
 346         if (!ends_with(path, "/"))
 347                 return;
 348
 349         /* Drop trailing slash for aesthetics */
 350         strbuf_addstr(&name, path);
 351         strbuf_strip_suffix(&name, "/");
 352
 353         warning(_("adding embedded git repository: %s"), name.buf);
 354         if (advice_add_embedded_repo) {
 355                 advise(embedded_advice, name.buf, name.buf);
 356                 /* there may be multiple entries; advise only once */
 357                 advice_add_embedded_repo = 0;
 358         }
 359
 360         strbuf_release(&name);
 361 }
 362
 363 static int add_files(struct dir_struct *dir, int flags)
 364 {
 365         int i, exit_status = 0;
 366
 367         if (dir->ignored_nr) {
 368                 fprintf(stderr, _(ignore_error));
 369                 for (i = 0; i < dir->ignored_nr; i++)
 370                         fprintf(stderr, "%s\n", dir->ignored[i]->name);
 371                 fprintf(stderr, _("Use -f if you really want to add them.\n"));
 372                 exit_status = 1;
 373         }
 374
 375         for (i = 0; i < dir->nr; i++) {
 376                 check_embedded_repo(dir->entries[i]->name);
 377                 if (add_file_to_index(&the_index, dir->entries[i]->name, flags)) {
 378                         if (!ignore_add_errors)
 379                                 die(_("adding files failed"));
 380                         exit_status = 1;
 381                 }
 382         }
 383         return exit_status;
 384 }
 385
 386 int cmd_add(int argc, const char **argv, const char *prefix)
 387 {
 388         int exit_status = 0;
 389         struct pathspec pathspec;
 390         struct dir_struct dir;
 391         int flags;
 392         int add_new_files;
 393         int require_pathspec;
 394         char *seen = NULL;
 395         struct lock_file lock_file = LOCK_INIT;
 396
 397         git_config(add_config, NULL);
 398
 399         argc = parse_options(argc, argv, prefix, builtin_add_options,
 400                           builtin_add_usage, PARSE_OPT_KEEP_ARGV0);
 401         if (patch_interactive)
 402                 add_interactive = 1;
 403         if (add_interactive)
 404                 exit(interactive_add(argc - 1, argv + 1, prefix, patch_interactive));
 405
 406         if (edit_interactive)
 407                 return(edit_patch(argc, argv, prefix));
 408         argc--;
 409         argv++;
 410
 411         if (0 <= addremove_explicit)
 412                 addremove = addremove_explicit;
 413         else if (take_worktree_changes && ADDREMOVE_DEFAULT)
 414                 addremove = 0; /* "-u" was given but not "-A" */
 415
 416         if (addremove && take_worktree_changes)
 417                 die(_("-A and -u are mutually incompatible"));
 418
 419         if (!take_worktree_changes && addremove_explicit < 0 && argc)
 420                 /* Turn "git add pathspec..." to "git add -A pathspec..." */
 421                 addremove = 1;
 422
 423         if (!show_only && ignore_missing)
 424                 die(_("Option --ignore-missing can only be used together with --dry-run"));
 425
 426         if (chmod_arg && ((chmod_arg[0] != '-' && chmod_arg[0] != '+') ||
 427                           chmod_arg[1] != 'x' || chmod_arg[2]))
 428                 die(_("--chmod param '%s' must be either -x or +x"), chmod_arg);
 429
 430         add_new_files = !take_worktree_changes && !refresh_only && !add_renormalize;
 431         require_pathspec = !(take_worktree_changes || (0 < addremove_explicit));
 432
 433         hold_locked_index(&lock_file, LOCK_DIE_ON_ERROR);
 434
 435         flags = ((verbose ? ADD_CACHE_VERBOSE : 0) |
 436                  (show_only ? ADD_CACHE_PRETEND : 0) |
 437                  (intent_to_add ? ADD_CACHE_INTENT : 0) |
 438                  (ignore_add_errors ? ADD_CACHE_IGNORE_ERRORS : 0) |
 439                  (!(addremove || take_worktree_changes)
 440                   ? ADD_CACHE_IGNORE_REMOVAL : 0));
 441
 442         if (require_pathspec && argc == 0) {
 443                 fprintf(stderr, _("Nothing specified, nothing added.\n"));
 444                 fprintf(stderr, _("Maybe you wanted to say 'git add .'?\n"));
 445                 return 0;
 446         }
 447
 448         /*
 449          * Check the "pathspec '%s' did not match any files" block
 450          * below before enabling new magic.
 451          */
 452         parse_pathspec(&pathspec, PATHSPEC_ATTR,
 453                        PATHSPEC_PREFER_FULL |
 454                        PATHSPEC_SYMLINK_LEADING_PATH,
 455                        prefix, argv);
 456
 457         if (read_cache_preload(&pathspec) < 0)
 458                 die(_("index file corrupt"));
 459
 460         die_in_unpopulated_submodule(&the_index, prefix);
 461         die_path_inside_submodule(&the_index, &pathspec);
 462
 463         if (add_new_files) {
 464                 int baselen;
 465
 466                 /* Set up the default git porcelain excludes */
 467                 memset(&dir, 0, sizeof(dir));
 468                 if (!ignored_too) {
 469                         dir.flags |= DIR_COLLECT_IGNORED;
 470                         setup_standard_excludes(&dir);
 471                 }
 472
 473                 /* This picks up the paths that are not tracked */
 474                 baselen = fill_directory(&dir, &the_index, &pathspec);
 475                 if (pathspec.nr)
 476                         seen = prune_directory(&dir, &pathspec, baselen);
 477         }
 478
 479         if (refresh_only) {
 480                 refresh(verbose, &pathspec);
 481                 goto finish;
 482         }
 483
 484         if (pathspec.nr) {
 485                 int i;
 486
 487                 if (!seen)
 488                         seen = find_pathspecs_matching_against_index(&pathspec, &the_index);
 489
 490                 /*
 491                  * file_exists() assumes exact match
 492                  */
 493                 GUARD_PATHSPEC(&pathspec,
 494                                PATHSPEC_FROMTOP |
 495                                PATHSPEC_LITERAL |
 496                                PATHSPEC_GLOB |
 497                                PATHSPEC_ICASE |
 498                                PATHSPEC_EXCLUDE);
 499
 500                 for (i = 0; i < pathspec.nr; i++) {
 501                         const char *path = pathspec.items[i].match;
 502                         if (pathspec.items[i].magic & PATHSPEC_EXCLUDE)
 503                                 continue;
 504                         if (!seen[i] && path[0] &&
 505                             ((pathspec.items[i].magic &
 506                               (PATHSPEC_GLOB | PATHSPEC_ICASE)) ||
 507                              !file_exists(path))) {
 508                                 if (ignore_missing) {
 509                                         int dtype = DT_UNKNOWN;
 510                                         if (is_excluded(&dir, &the_index, path, &dtype))
 511                                                 dir_add_ignored(&dir, &the_index,
 512                                                                 path, pathspec.items[i].len);
 513                                 } else
 514                                         die(_("pathspec '%s' did not match any files"),
 515                                             pathspec.items[i].original);
 516                         }
 517                 }
 518                 free(seen);
 519         }
 520
 521         plug_bulk_checkin();
 522
 523         if (add_renormalize)
 524                 exit_status |= renormalize_tracked_files(&pathspec, flags);
 525         else
 526                 exit_status |= add_files_to_cache(prefix, &pathspec, flags);
 527
 528         if (add_new_files)
 529                 exit_status |= add_files(&dir, flags);
 530
 531         if (chmod_arg && pathspec.nr)
 532                 chmod_pathspec(&pathspec, chmod_arg[0]);
 533         unplug_bulk_checkin();
 534
 535 finish:
 536         if (write_locked_index(&the_index, &lock_file,
 537                                COMMIT_LOCK | SKIP_IF_UNCHANGED))
 538                 die(_("Unable to write new index file"));
 539
 540         UNLEAK(pathspec);
 541         UNLEAK(dir);
 542         return exit_status;
 543 }