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