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 "pathspec.h"
  10 #include "exec_cmd.h"
  11 #include "cache-tree.h"
  12 #include "run-command.h"
  13 #include "parse-options.h"
  14 #include "diff.h"
  15 #include "diffcore.h"
  16 #include "revision.h"
  17 #include "bulk-checkin.h"
  18
  19 static const char * const builtin_add_usage[] = {
  20         N_("git add [options] [--] <pathspec>..."),
  21         NULL
  22 };
  23 static int patch_interactive, add_interactive, edit_interactive;
  24 static int take_worktree_changes;
  25
  26 struct update_callback_data {
  27         int flags;
  28         int add_errors;
  29         const char *implicit_dot;
  30         size_t implicit_dot_len;
  31
  32         /* only needed for 2.0 transition preparation */
  33         int warn_add_would_remove;
  34 };
  35
  36 static const char *option_with_implicit_dot;
  37 static const char *short_option_with_implicit_dot;
  38
  39 static void warn_pathless_add(void)
  40 {
  41         static int shown;
  42         assert(option_with_implicit_dot && short_option_with_implicit_dot);
  43
  44         if (shown)
  45                 return;
  46         shown = 1;
  47
  48         /*
  49          * To be consistent with "git add -p" and most Git
  50          * commands, we should default to being tree-wide, but
  51          * this is not the original behavior and can't be
  52          * changed until users trained themselves not to type
  53          * "git add -u" or "git add -A". For now, we warn and
  54          * keep the old behavior. Later, the behavior can be changed
  55          * to tree-wide, keeping the warning for a while, and
  56          * eventually we can drop the warning.
  57          */
  58         warning(_("The behavior of 'git add %s (or %s)' with no path argument from a\n"
  59                   "subdirectory of the tree will change in Git 2.0 and should not be used anymore.\n"
  60                   "To add content for the whole tree, run:\n"
  61                   "\n"
  62                   "  git add %s :/\n"
  63                   "  (or git add %s :/)\n"
  64                   "\n"
  65                   "To restrict the command to the current directory, run:\n"
  66                   "\n"
  67                   "  git add %s .\n"
  68                   "  (or git add %s .)\n"
  69                   "\n"
  70                   "With the current Git version, the command is restricted to "
  71                   "the current directory.\n"
  72                   ""),
  73                 option_with_implicit_dot, short_option_with_implicit_dot,
  74                 option_with_implicit_dot, short_option_with_implicit_dot,
  75                 option_with_implicit_dot, short_option_with_implicit_dot);
  76 }
  77
  78 static int fix_unmerged_status(struct diff_filepair *p,
  79                                struct update_callback_data *data)
  80 {
  81         if (p->status != DIFF_STATUS_UNMERGED)
  82                 return p->status;
  83         if (!(data->flags & ADD_CACHE_IGNORE_REMOVAL) && !p->two->mode)
  84                 /*
  85                  * This is not an explicit add request, and the
  86                  * path is missing from the working tree (deleted)
  87                  */
  88                 return DIFF_STATUS_DELETED;
  89         else
  90                 /*
  91                  * Either an explicit add request, or path exists
  92                  * in the working tree.  An attempt to explicitly
  93                  * add a path that does not exist in the working tree
  94                  * will be caught as an error by the caller immediately.
  95                  */
  96                 return DIFF_STATUS_MODIFIED;
  97 }
  98
  99 static const char *add_would_remove_warning = N_(
 100         "You ran 'git add' with neither '-A (--all)' or '--ignore-removal',\n"
 101 "whose behaviour will change in Git 2.0 with respect to paths you removed.\n"
 102 "Paths like '%s' that are\n"
 103 "removed from your working tree are ignored with this version of Git.\n"
 104 "\n"
 105 "* 'git add --ignore-removal <pathspec>', which is the current default,\n"
 106 "  ignores paths you removed from your working tree.\n"
 107 "\n"
 108 "* 'git add --all <pathspec>' will let you also record the removals.\n"
 109 "\n"
 110 "Run 'git status' to check the paths you removed from your working tree.\n");
 111
 112 static void warn_add_would_remove(const char *path)
 113 {
 114         warning(_(add_would_remove_warning), path);
 115 }
 116
 117 static void update_callback(struct diff_queue_struct *q,
 118                             struct diff_options *opt, void *cbdata)
 119 {
 120         int i;
 121         struct update_callback_data *data = cbdata;
 122         const char *implicit_dot = data->implicit_dot;
 123         size_t implicit_dot_len = data->implicit_dot_len;
 124
 125         for (i = 0; i < q->nr; i++) {
 126                 struct diff_filepair *p = q->queue[i];
 127                 const char *path = p->one->path;
 128                 /*
 129                  * Check if "git add -A" or "git add -u" was run from a
 130                  * subdirectory with a modified file outside that directory,
 131                  * and warn if so.
 132                  *
 133                  * "git add -u" will behave like "git add -u :/" instead of
 134                  * "git add -u ." in the future.  This warning prepares for
 135                  * that change.
 136                  */
 137                 if (implicit_dot &&
 138                     strncmp_icase(path, implicit_dot, implicit_dot_len)) {
 139                         warn_pathless_add();
 140                         continue;
 141                 }
 142                 switch (fix_unmerged_status(p, data)) {
 143                 default:
 144                         die(_("unexpected diff status %c"), p->status);
 145                 case DIFF_STATUS_MODIFIED:
 146                 case DIFF_STATUS_TYPE_CHANGED:
 147                         if (add_file_to_index(&the_index, path, data->flags)) {
 148                                 if (!(data->flags & ADD_CACHE_IGNORE_ERRORS))
 149                                         die(_("updating files failed"));
 150                                 data->add_errors++;
 151                         }
 152                         break;
 153                 case DIFF_STATUS_DELETED:
 154                         if (data->warn_add_would_remove) {
 155                                 warn_add_would_remove(path);
 156                                 data->warn_add_would_remove = 0;
 157                         }
 158                         if (data->flags & ADD_CACHE_IGNORE_REMOVAL)
 159                                 break;
 160                         if (!(data->flags & ADD_CACHE_PRETEND))
 161                                 remove_file_from_index(&the_index, path);
 162                         if (data->flags & (ADD_CACHE_PRETEND|ADD_CACHE_VERBOSE))
 163                                 printf(_("remove '%s'\n"), path);
 164                         break;
 165                 }
 166         }
 167 }
 168
 169 static void update_files_in_cache(const char *prefix,
 170                                   const struct pathspec *pathspec,
 171                                   struct update_callback_data *data)
 172 {
 173         struct rev_info rev;
 174
 175         init_revisions(&rev, prefix);
 176         setup_revisions(0, NULL, &rev, NULL);
 177         if (pathspec)
 178                 copy_pathspec(&rev.prune_data, pathspec);
 179         rev.diffopt.output_format = DIFF_FORMAT_CALLBACK;
 180         rev.diffopt.format_callback = update_callback;
 181         rev.diffopt.format_callback_data = data;
 182         rev.max_count = 0; /* do not compare unmerged paths with stage #2 */
 183         run_diff_files(&rev, DIFF_RACY_IS_MODIFIED);
 184 }
 185
 186 int add_files_to_cache(const char *prefix,
 187                        const struct pathspec *pathspec, int flags)
 188 {
 189         struct update_callback_data data;
 190
 191         memset(&data, 0, sizeof(data));
 192         data.flags = flags;
 193         update_files_in_cache(prefix, pathspec, &data);
 194         return !!data.add_errors;
 195 }
 196
 197 #define WARN_IMPLICIT_DOT (1u << 0)
 198 static char *prune_directory(struct dir_struct *dir, struct pathspec *pathspec,
 199                              int prefix, unsigned flag)
 200 {
 201         char *seen;
 202         int i;
 203         struct dir_entry **src, **dst;
 204
 205         seen = xcalloc(pathspec->nr, 1);
 206
 207         src = dst = dir->entries;
 208         i = dir->nr;
 209         while (--i >= 0) {
 210                 struct dir_entry *entry = *src++;
 211                 if (match_pathspec_depth(pathspec, entry->name, entry->len,
 212                                          prefix, seen))
 213                         *dst++ = entry;
 214                 else if (flag & WARN_IMPLICIT_DOT)
 215                         /*
 216                          * "git add -A" was run from a subdirectory with a
 217                          * new file outside that directory.
 218                          *
 219                          * "git add -A" will behave like "git add -A :/"
 220                          * instead of "git add -A ." in the future.
 221                          * Warn about the coming behavior change.
 222                          */
 223                         warn_pathless_add();
 224         }
 225         dir->nr = dst - dir->entries;
 226         add_pathspec_matches_against_index(pathspec, seen);
 227         return seen;
 228 }
 229
 230 static void refresh(int verbose, const struct pathspec *pathspec)
 231 {
 232         char *seen;
 233         int i;
 234
 235         seen = xcalloc(pathspec->nr, 1);
 236         refresh_index(&the_index, verbose ? REFRESH_IN_PORCELAIN : REFRESH_QUIET,
 237                       pathspec, seen, _("Unstaged changes after refreshing the index:"));
 238         for (i = 0; i < pathspec->nr; i++) {
 239                 if (!seen[i])
 240                         die(_("pathspec '%s' did not match any files"),
 241                             pathspec->items[i].match);
 242         }
 243         free(seen);
 244 }
 245
 246 int run_add_interactive(const char *revision, const char *patch_mode,
 247                         const struct pathspec *pathspec)
 248 {
 249         int status, ac, i;
 250         const char **args;
 251
 252         args = xcalloc(sizeof(const char *), (pathspec->nr + 6));
 253         ac = 0;
 254         args[ac++] = "add--interactive";
 255         if (patch_mode)
 256                 args[ac++] = patch_mode;
 257         if (revision)
 258                 args[ac++] = revision;
 259         args[ac++] = "--";
 260         for (i = 0; i < pathspec->nr; i++)
 261                 /* pass original pathspec, to be re-parsed */
 262                 args[ac++] = pathspec->items[i].original;
 263
 264         status = run_command_v_opt(args, RUN_GIT_CMD);
 265         free(args);
 266         return status;
 267 }
 268
 269 int interactive_add(int argc, const char **argv, const char *prefix, int patch)
 270 {
 271         struct pathspec pathspec;
 272
 273         parse_pathspec(&pathspec, 0,
 274                        PATHSPEC_PREFER_FULL |
 275                        PATHSPEC_SYMLINK_LEADING_PATH |
 276                        PATHSPEC_PREFIX_ORIGIN,
 277                        prefix, argv);
 278
 279         return run_add_interactive(NULL,
 280                                    patch ? "--patch" : NULL,
 281                                    &pathspec);
 282 }
 283
 284 static int edit_patch(int argc, const char **argv, const char *prefix)
 285 {
 286         char *file = git_pathdup("ADD_EDIT.patch");
 287         const char *apply_argv[] = { "apply", "--recount", "--cached",
 288                 NULL, NULL };
 289         struct child_process child;
 290         struct rev_info rev;
 291         int out;
 292         struct stat st;
 293
 294         apply_argv[3] = file;
 295
 296         git_config(git_diff_basic_config, NULL); /* no "diff" UI options */
 297
 298         if (read_cache() < 0)
 299                 die(_("Could not read the index"));
 300
 301         init_revisions(&rev, prefix);
 302         rev.diffopt.context = 7;
 303
 304         argc = setup_revisions(argc, argv, &rev, NULL);
 305         rev.diffopt.output_format = DIFF_FORMAT_PATCH;
 306         rev.diffopt.use_color = 0;
 307         DIFF_OPT_SET(&rev.diffopt, IGNORE_DIRTY_SUBMODULES);
 308         out = open(file, O_CREAT | O_WRONLY, 0666);
 309         if (out < 0)
 310                 die(_("Could not open '%s' for writing."), file);
 311         rev.diffopt.file = xfdopen(out, "w");
 312         rev.diffopt.close_file = 1;
 313         if (run_diff_files(&rev, 0))
 314                 die(_("Could not write patch"));
 315
 316         launch_editor(file, NULL, NULL);
 317
 318         if (stat(file, &st))
 319                 die_errno(_("Could not stat '%s'"), file);
 320         if (!st.st_size)
 321                 die(_("Empty patch. Aborted."));
 322
 323         memset(&child, 0, sizeof(child));
 324         child.git_cmd = 1;
 325         child.argv = apply_argv;
 326         if (run_command(&child))
 327                 die(_("Could not apply '%s'"), file);
 328
 329         unlink(file);
 330         free(file);
 331         return 0;
 332 }
 333
 334 static struct lock_file lock_file;
 335
 336 static const char ignore_error[] =
 337 N_("The following paths are ignored by one of your .gitignore files:\n");
 338
 339 static int verbose, show_only, ignored_too, refresh_only;
 340 static int ignore_add_errors, intent_to_add, ignore_missing;
 341
 342 #define ADDREMOVE_DEFAULT 0 /* Change to 1 in Git 2.0 */
 343 static int addremove = ADDREMOVE_DEFAULT;
 344 static int addremove_explicit = -1; /* unspecified */
 345
 346 static int ignore_removal_cb(const struct option *opt, const char *arg, int unset)
 347 {
 348         /* if we are told to ignore, we are not adding removals */
 349         *(int *)opt->value = !unset ? 0 : 1;
 350         return 0;
 351 }
 352
 353 static struct option builtin_add_options[] = {
 354         OPT__DRY_RUN(&show_only, N_("dry run")),
 355         OPT__VERBOSE(&verbose, N_("be verbose")),
 356         OPT_GROUP(""),
 357         OPT_BOOL('i', "interactive", &add_interactive, N_("interactive picking")),
 358         OPT_BOOL('p', "patch", &patch_interactive, N_("select hunks interactively")),
 359         OPT_BOOL('e', "edit", &edit_interactive, N_("edit current diff and apply")),
 360         OPT__FORCE(&ignored_too, N_("allow adding otherwise ignored files")),
 361         OPT_BOOL('u', "update", &take_worktree_changes, N_("update tracked files")),
 362         OPT_BOOL('N', "intent-to-add", &intent_to_add, N_("record only the fact that the path will be added later")),
 363         OPT_BOOL('A', "all", &addremove_explicit, N_("add changes from all tracked and untracked files")),
 364         { OPTION_CALLBACK, 0, "ignore-removal", &addremove_explicit,
 365           NULL /* takes no arguments */,
 366           N_("ignore paths removed in the working tree (same as --no-all)"),
 367           PARSE_OPT_NOARG, ignore_removal_cb },
 368         OPT_BOOL( 0 , "refresh", &refresh_only, N_("don't add, only refresh the index")),
 369         OPT_BOOL( 0 , "ignore-errors", &ignore_add_errors, N_("just skip files which cannot be added because of errors")),
 370         OPT_BOOL( 0 , "ignore-missing", &ignore_missing, N_("check if - even missing - files are ignored in dry run")),
 371         OPT_END(),
 372 };
 373
 374 static int add_config(const char *var, const char *value, void *cb)
 375 {
 376         if (!strcmp(var, "add.ignoreerrors") ||
 377             !strcmp(var, "add.ignore-errors")) {
 378                 ignore_add_errors = git_config_bool(var, value);
 379                 return 0;
 380         }
 381         return git_default_config(var, value, cb);
 382 }
 383
 384 static int add_files(struct dir_struct *dir, int flags)
 385 {
 386         int i, exit_status = 0;
 387
 388         if (dir->ignored_nr) {
 389                 fprintf(stderr, _(ignore_error));
 390                 for (i = 0; i < dir->ignored_nr; i++)
 391                         fprintf(stderr, "%s\n", dir->ignored[i]->name);
 392                 fprintf(stderr, _("Use -f if you really want to add them.\n"));
 393                 die(_("no files added"));
 394         }
 395
 396         for (i = 0; i < dir->nr; i++)
 397                 if (add_file_to_cache(dir->entries[i]->name, flags)) {
 398                         if (!ignore_add_errors)
 399                                 die(_("adding files failed"));
 400                         exit_status = 1;
 401                 }
 402         return exit_status;
 403 }
 404
 405 int cmd_add(int argc, const char **argv, const char *prefix)
 406 {
 407         int exit_status = 0;
 408         int newfd;
 409         struct pathspec pathspec;
 410         struct dir_struct dir;
 411         int flags;
 412         int add_new_files;
 413         int require_pathspec;
 414         char *seen = NULL;
 415         int implicit_dot = 0;
 416         struct update_callback_data update_data;
 417
 418         git_config(add_config, NULL);
 419
 420         argc = parse_options(argc, argv, prefix, builtin_add_options,
 421                           builtin_add_usage, PARSE_OPT_KEEP_ARGV0);
 422         if (patch_interactive)
 423                 add_interactive = 1;
 424         if (add_interactive)
 425                 exit(interactive_add(argc - 1, argv + 1, prefix, patch_interactive));
 426
 427         if (edit_interactive)
 428                 return(edit_patch(argc, argv, prefix));
 429         argc--;
 430         argv++;
 431
 432         if (0 <= addremove_explicit)
 433                 addremove = addremove_explicit;
 434         else if (take_worktree_changes && ADDREMOVE_DEFAULT)
 435                 addremove = 0; /* "-u" was given but not "-A" */
 436
 437         if (addremove && take_worktree_changes)
 438                 die(_("-A and -u are mutually incompatible"));
 439
 440         /*
 441          * Warn when "git add pathspec..." was given without "-u" or "-A"
 442          * and pathspec... covers a removed path.
 443          */
 444         memset(&update_data, 0, sizeof(update_data));
 445         if (!take_worktree_changes && addremove_explicit < 0)
 446                 update_data.warn_add_would_remove = 1;
 447
 448         if (!take_worktree_changes && addremove_explicit < 0 && argc)
 449                 /*
 450                  * Turn "git add pathspec..." to "git add -A pathspec..."
 451                  * in Git 2.0 but not yet
 452                  */
 453                 ; /* addremove = 1; */
 454
 455         if (!show_only && ignore_missing)
 456                 die(_("Option --ignore-missing can only be used together with --dry-run"));
 457         if (addremove) {
 458                 option_with_implicit_dot = "--all";
 459                 short_option_with_implicit_dot = "-A";
 460         }
 461         if (take_worktree_changes) {
 462                 option_with_implicit_dot = "--update";
 463                 short_option_with_implicit_dot = "-u";
 464         }
 465         if (option_with_implicit_dot && !argc) {
 466                 static const char *here[2] = { ".", NULL };
 467                 argc = 1;
 468                 argv = here;
 469                 implicit_dot = 1;
 470         }
 471
 472         add_new_files = !take_worktree_changes && !refresh_only;
 473         require_pathspec = !take_worktree_changes;
 474
 475         newfd = hold_locked_index(&lock_file, 1);
 476
 477         flags = ((verbose ? ADD_CACHE_VERBOSE : 0) |
 478                  (show_only ? ADD_CACHE_PRETEND : 0) |
 479                  (intent_to_add ? ADD_CACHE_INTENT : 0) |
 480                  (ignore_add_errors ? ADD_CACHE_IGNORE_ERRORS : 0) |
 481                  (!(addremove || take_worktree_changes)
 482                   ? ADD_CACHE_IGNORE_REMOVAL : 0)) |
 483                  (implicit_dot ? ADD_CACHE_IMPLICIT_DOT : 0);
 484
 485         if (require_pathspec && argc == 0) {
 486                 fprintf(stderr, _("Nothing specified, nothing added.\n"));
 487                 fprintf(stderr, _("Maybe you wanted to say 'git add .'?\n"));
 488                 return 0;
 489         }
 490
 491         if (read_cache() < 0)
 492                 die(_("index file corrupt"));
 493
 494         /*
 495          * Check the "pathspec '%s' did not match any files" block
 496          * below before enabling new magic.
 497          */
 498         parse_pathspec(&pathspec, 0,
 499                        PATHSPEC_PREFER_FULL |
 500                        PATHSPEC_SYMLINK_LEADING_PATH |
 501                        PATHSPEC_STRIP_SUBMODULE_SLASH_EXPENSIVE,
 502                        prefix, argv);
 503
 504         if (add_new_files) {
 505                 int baselen;
 506                 struct pathspec empty_pathspec;
 507
 508                 /* Set up the default git porcelain excludes */
 509                 memset(&dir, 0, sizeof(dir));
 510                 if (!ignored_too) {
 511                         dir.flags |= DIR_COLLECT_IGNORED;
 512                         setup_standard_excludes(&dir);
 513                 }
 514
 515                 memset(&empty_pathspec, 0, sizeof(empty_pathspec));
 516                 /* This picks up the paths that are not tracked */
 517                 baselen = fill_directory(&dir, implicit_dot ? &empty_pathspec : &pathspec);
 518                 if (pathspec.nr)
 519                         seen = prune_directory(&dir, &pathspec, baselen,
 520                                         implicit_dot ? WARN_IMPLICIT_DOT : 0);
 521         }
 522
 523         if (refresh_only) {
 524                 refresh(verbose, &pathspec);
 525                 goto finish;
 526         }
 527         if (implicit_dot && prefix)
 528                 refresh_cache(REFRESH_QUIET);
 529
 530         if (pathspec.nr) {
 531                 int i;
 532
 533                 if (!seen)
 534                         seen = find_pathspecs_matching_against_index(&pathspec);
 535
 536                 /*
 537                  * file_exists() assumes exact match
 538                  */
 539                 GUARD_PATHSPEC(&pathspec,
 540                                PATHSPEC_FROMTOP |
 541                                PATHSPEC_LITERAL |
 542                                PATHSPEC_GLOB |
 543                                PATHSPEC_ICASE);
 544
 545                 for (i = 0; i < pathspec.nr; i++) {
 546                         const char *path = pathspec.items[i].match;
 547                         if (!seen[i] &&
 548                             ((pathspec.items[i].magic &
 549                               (PATHSPEC_GLOB | PATHSPEC_ICASE)) ||
 550                              !file_exists(path))) {
 551                                 if (ignore_missing) {
 552                                         int dtype = DT_UNKNOWN;
 553                                         if (is_excluded(&dir, path, &dtype))
 554                                                 dir_add_ignored(&dir, path, pathspec.items[i].len);
 555                                 } else
 556                                         die(_("pathspec '%s' did not match any files"),
 557                                             pathspec.items[i].original);
 558                         }
 559                 }
 560                 free(seen);
 561         }
 562
 563         plug_bulk_checkin();
 564
 565         if ((flags & ADD_CACHE_IMPLICIT_DOT) && prefix) {
 566                 /*
 567                  * Check for modified files throughout the worktree so
 568                  * update_callback has a chance to warn about changes
 569                  * outside the cwd.
 570                  */
 571                 update_data.implicit_dot = prefix;
 572                 update_data.implicit_dot_len = strlen(prefix);
 573                 free_pathspec(&pathspec);
 574                 memset(&pathspec, 0, sizeof(pathspec));
 575         }
 576         update_data.flags = flags & ~ADD_CACHE_IMPLICIT_DOT;
 577         update_files_in_cache(prefix, &pathspec, &update_data);
 578
 579         exit_status |= !!update_data.add_errors;
 580         if (add_new_files)
 581                 exit_status |= add_files(&dir, flags);
 582
 583         unplug_bulk_checkin();
 584
 585 finish:
 586         if (active_cache_changed) {
 587                 if (write_cache(newfd, active_cache, active_nr) ||
 588                     commit_locked_index(&lock_file))
 589                         die(_("Unable to write new index file"));
 590         }
 591
 592         return exit_status;
 593 }