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 '--no-all', whose\n"
 101 "behaviour will change in Git 2.0 with respect to paths you removed from\n"
 102 "your working tree. Paths like '%s' that are\n"
 103 "removed are ignored with this version of Git.\n"
 104 "\n"
 105 "* 'git add --no-all <pathspec>', which is the current default, ignores\n"
 106 "  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, const char **pathspec,
 170                                   struct update_callback_data *data)
 171 {
 172         struct rev_info rev;
 173
 174         init_revisions(&rev, prefix);
 175         setup_revisions(0, NULL, &rev, NULL);
 176         init_pathspec(&rev.prune_data, pathspec);
 177         rev.diffopt.output_format = DIFF_FORMAT_CALLBACK;
 178         rev.diffopt.format_callback = update_callback;
 179         rev.diffopt.format_callback_data = data;
 180         rev.max_count = 0; /* do not compare unmerged paths with stage #2 */
 181         run_diff_files(&rev, DIFF_RACY_IS_MODIFIED);
 182 }
 183
 184 int add_files_to_cache(const char *prefix, const char **pathspec, int flags)
 185 {
 186         struct update_callback_data data;
 187
 188         memset(&data, 0, sizeof(data));
 189         data.flags = flags;
 190         update_files_in_cache(prefix, pathspec, &data);
 191         return !!data.add_errors;
 192 }
 193
 194 #define WARN_IMPLICIT_DOT (1u << 0)
 195 static char *prune_directory(struct dir_struct *dir, const char **pathspec,
 196                              int prefix, unsigned flag)
 197 {
 198         char *seen;
 199         int i, specs;
 200         struct dir_entry **src, **dst;
 201
 202         for (specs = 0; pathspec[specs];  specs++)
 203                 /* nothing */;
 204         seen = xcalloc(specs, 1);
 205
 206         src = dst = dir->entries;
 207         i = dir->nr;
 208         while (--i >= 0) {
 209                 struct dir_entry *entry = *src++;
 210                 if (match_pathspec(pathspec, entry->name, entry->len,
 211                                    prefix, seen))
 212                         *dst++ = entry;
 213                 else if (flag & WARN_IMPLICIT_DOT)
 214                         /*
 215                          * "git add -A" was run from a subdirectory with a
 216                          * new file outside that directory.
 217                          *
 218                          * "git add -A" will behave like "git add -A :/"
 219                          * instead of "git add -A ." in the future.
 220                          * Warn about the coming behavior change.
 221                          */
 222                         warn_pathless_add();
 223         }
 224         dir->nr = dst - dir->entries;
 225         add_pathspec_matches_against_index(pathspec, seen, specs);
 226         return seen;
 227 }
 228
 229 /*
 230  * Checks the index to see whether any path in pathspec refers to
 231  * something inside a submodule.  If so, dies with an error message.
 232  */
 233 static void treat_gitlinks(const char **pathspec)
 234 {
 235         int i;
 236
 237         if (!pathspec || !*pathspec)
 238                 return;
 239
 240         for (i = 0; pathspec[i]; i++)
 241                 pathspec[i] = check_path_for_gitlink(pathspec[i]);
 242 }
 243
 244 static void refresh(int verbose, const char **pathspec)
 245 {
 246         char *seen;
 247         int i, specs;
 248
 249         for (specs = 0; pathspec[specs];  specs++)
 250                 /* nothing */;
 251         seen = xcalloc(specs, 1);
 252         refresh_index(&the_index, verbose ? REFRESH_IN_PORCELAIN : REFRESH_QUIET,
 253                       pathspec, seen, _("Unstaged changes after refreshing the index:"));
 254         for (i = 0; i < specs; i++) {
 255                 if (!seen[i])
 256                         die(_("pathspec '%s' did not match any files"), pathspec[i]);
 257         }
 258         free(seen);
 259 }
 260
 261 /*
 262  * Normalizes argv relative to prefix, via get_pathspec(), and then
 263  * runs die_if_path_beyond_symlink() on each path in the normalized
 264  * list.
 265  */
 266 static const char **validate_pathspec(const char **argv, const char *prefix)
 267 {
 268         const char **pathspec = get_pathspec(prefix, argv);
 269
 270         if (pathspec) {
 271                 const char **p;
 272                 for (p = pathspec; *p; p++) {
 273                         die_if_path_beyond_symlink(*p, prefix);
 274                 }
 275         }
 276
 277         return pathspec;
 278 }
 279
 280 int run_add_interactive(const char *revision, const char *patch_mode,
 281                         const char **pathspec)
 282 {
 283         int status, ac, pc = 0;
 284         const char **args;
 285
 286         if (pathspec)
 287                 while (pathspec[pc])
 288                         pc++;
 289
 290         args = xcalloc(sizeof(const char *), (pc + 5));
 291         ac = 0;
 292         args[ac++] = "add--interactive";
 293         if (patch_mode)
 294                 args[ac++] = patch_mode;
 295         if (revision)
 296                 args[ac++] = revision;
 297         args[ac++] = "--";
 298         if (pc) {
 299                 memcpy(&(args[ac]), pathspec, sizeof(const char *) * pc);
 300                 ac += pc;
 301         }
 302         args[ac] = NULL;
 303
 304         status = run_command_v_opt(args, RUN_GIT_CMD);
 305         free(args);
 306         return status;
 307 }
 308
 309 int interactive_add(int argc, const char **argv, const char *prefix, int patch)
 310 {
 311         const char **pathspec = NULL;
 312
 313         if (argc) {
 314                 pathspec = validate_pathspec(argv, prefix);
 315                 if (!pathspec)
 316                         return -1;
 317         }
 318
 319         return run_add_interactive(NULL,
 320                                    patch ? "--patch" : NULL,
 321                                    pathspec);
 322 }
 323
 324 static int edit_patch(int argc, const char **argv, const char *prefix)
 325 {
 326         char *file = git_pathdup("ADD_EDIT.patch");
 327         const char *apply_argv[] = { "apply", "--recount", "--cached",
 328                 NULL, NULL };
 329         struct child_process child;
 330         struct rev_info rev;
 331         int out;
 332         struct stat st;
 333
 334         apply_argv[3] = file;
 335
 336         git_config(git_diff_basic_config, NULL); /* no "diff" UI options */
 337
 338         if (read_cache() < 0)
 339                 die (_("Could not read the index"));
 340
 341         init_revisions(&rev, prefix);
 342         rev.diffopt.context = 7;
 343
 344         argc = setup_revisions(argc, argv, &rev, NULL);
 345         rev.diffopt.output_format = DIFF_FORMAT_PATCH;
 346         DIFF_OPT_SET(&rev.diffopt, IGNORE_DIRTY_SUBMODULES);
 347         out = open(file, O_CREAT | O_WRONLY, 0666);
 348         if (out < 0)
 349                 die (_("Could not open '%s' for writing."), file);
 350         rev.diffopt.file = xfdopen(out, "w");
 351         rev.diffopt.close_file = 1;
 352         if (run_diff_files(&rev, 0))
 353                 die (_("Could not write patch"));
 354
 355         launch_editor(file, NULL, NULL);
 356
 357         if (stat(file, &st))
 358                 die_errno(_("Could not stat '%s'"), file);
 359         if (!st.st_size)
 360                 die(_("Empty patch. Aborted."));
 361
 362         memset(&child, 0, sizeof(child));
 363         child.git_cmd = 1;
 364         child.argv = apply_argv;
 365         if (run_command(&child))
 366                 die (_("Could not apply '%s'"), file);
 367
 368         unlink(file);
 369         free(file);
 370         return 0;
 371 }
 372
 373 static struct lock_file lock_file;
 374
 375 static const char ignore_error[] =
 376 N_("The following paths are ignored by one of your .gitignore files:\n");
 377
 378 static int verbose, show_only, ignored_too, refresh_only;
 379 static int ignore_add_errors, intent_to_add, ignore_missing;
 380
 381 #define ADDREMOVE_DEFAULT 0 /* Change to 1 in Git 2.0 */
 382 static int addremove = ADDREMOVE_DEFAULT;
 383 static int addremove_explicit = -1; /* unspecified */
 384
 385 static struct option builtin_add_options[] = {
 386         OPT__DRY_RUN(&show_only, N_("dry run")),
 387         OPT__VERBOSE(&verbose, N_("be verbose")),
 388         OPT_GROUP(""),
 389         OPT_BOOL('i', "interactive", &add_interactive, N_("interactive picking")),
 390         OPT_BOOL('p', "patch", &patch_interactive, N_("select hunks interactively")),
 391         OPT_BOOL('e', "edit", &edit_interactive, N_("edit current diff and apply")),
 392         OPT__FORCE(&ignored_too, N_("allow adding otherwise ignored files")),
 393         OPT_BOOL('u', "update", &take_worktree_changes, N_("update tracked files")),
 394         OPT_BOOL('N', "intent-to-add", &intent_to_add, N_("record only the fact that the path will be added later")),
 395         OPT_BOOL('A', "all", &addremove_explicit, N_("add changes from all tracked and untracked files")),
 396         OPT_BOOL( 0 , "refresh", &refresh_only, N_("don't add, only refresh the index")),
 397         OPT_BOOL( 0 , "ignore-errors", &ignore_add_errors, N_("just skip files which cannot be added because of errors")),
 398         OPT_BOOL( 0 , "ignore-missing", &ignore_missing, N_("check if - even missing - files are ignored in dry run")),
 399         OPT_END(),
 400 };
 401
 402 static int add_config(const char *var, const char *value, void *cb)
 403 {
 404         if (!strcmp(var, "add.ignoreerrors") ||
 405             !strcmp(var, "add.ignore-errors")) {
 406                 ignore_add_errors = git_config_bool(var, value);
 407                 return 0;
 408         }
 409         return git_default_config(var, value, cb);
 410 }
 411
 412 static int add_files(struct dir_struct *dir, int flags)
 413 {
 414         int i, exit_status = 0;
 415
 416         if (dir->ignored_nr) {
 417                 fprintf(stderr, _(ignore_error));
 418                 for (i = 0; i < dir->ignored_nr; i++)
 419                         fprintf(stderr, "%s\n", dir->ignored[i]->name);
 420                 fprintf(stderr, _("Use -f if you really want to add them.\n"));
 421                 die(_("no files added"));
 422         }
 423
 424         for (i = 0; i < dir->nr; i++)
 425                 if (add_file_to_cache(dir->entries[i]->name, flags)) {
 426                         if (!ignore_add_errors)
 427                                 die(_("adding files failed"));
 428                         exit_status = 1;
 429                 }
 430         return exit_status;
 431 }
 432
 433 int cmd_add(int argc, const char **argv, const char *prefix)
 434 {
 435         int exit_status = 0;
 436         int newfd;
 437         const char **pathspec;
 438         struct dir_struct dir;
 439         int flags;
 440         int add_new_files;
 441         int require_pathspec;
 442         char *seen = NULL;
 443         int implicit_dot = 0;
 444         struct update_callback_data update_data;
 445
 446         git_config(add_config, NULL);
 447
 448         argc = parse_options(argc, argv, prefix, builtin_add_options,
 449                           builtin_add_usage, PARSE_OPT_KEEP_ARGV0);
 450         if (patch_interactive)
 451                 add_interactive = 1;
 452         if (add_interactive)
 453                 exit(interactive_add(argc - 1, argv + 1, prefix, patch_interactive));
 454
 455         if (edit_interactive)
 456                 return(edit_patch(argc, argv, prefix));
 457         argc--;
 458         argv++;
 459
 460         if (0 <= addremove_explicit)
 461                 addremove = addremove_explicit;
 462         else if (take_worktree_changes && ADDREMOVE_DEFAULT)
 463                 addremove = 0; /* "-u" was given but not "-A" */
 464
 465         if (addremove && take_worktree_changes)
 466                 die(_("-A and -u are mutually incompatible"));
 467
 468         /*
 469          * Warn when "git add pathspec..." was given without "-u" or "-A"
 470          * and pathspec... covers a removed path.
 471          */
 472         memset(&update_data, 0, sizeof(update_data));
 473         if (!take_worktree_changes && addremove_explicit < 0)
 474                 update_data.warn_add_would_remove = 1;
 475
 476         if (!take_worktree_changes && addremove_explicit < 0 && argc)
 477                 /*
 478                  * Turn "git add pathspec..." to "git add -A pathspec..."
 479                  * in Git 2.0 but not yet
 480                  */
 481                 ; /* addremove = 1; */
 482
 483         if (!show_only && ignore_missing)
 484                 die(_("Option --ignore-missing can only be used together with --dry-run"));
 485         if (addremove) {
 486                 option_with_implicit_dot = "--all";
 487                 short_option_with_implicit_dot = "-A";
 488         }
 489         if (take_worktree_changes) {
 490                 option_with_implicit_dot = "--update";
 491                 short_option_with_implicit_dot = "-u";
 492         }
 493         if (option_with_implicit_dot && !argc) {
 494                 static const char *here[2] = { ".", NULL };
 495                 argc = 1;
 496                 argv = here;
 497                 implicit_dot = 1;
 498         }
 499
 500         add_new_files = !take_worktree_changes && !refresh_only;
 501         require_pathspec = !take_worktree_changes;
 502
 503         newfd = hold_locked_index(&lock_file, 1);
 504
 505         flags = ((verbose ? ADD_CACHE_VERBOSE : 0) |
 506                  (show_only ? ADD_CACHE_PRETEND : 0) |
 507                  (intent_to_add ? ADD_CACHE_INTENT : 0) |
 508                  (ignore_add_errors ? ADD_CACHE_IGNORE_ERRORS : 0) |
 509                  (!(addremove || take_worktree_changes)
 510                   ? ADD_CACHE_IGNORE_REMOVAL : 0)) |
 511                  (implicit_dot ? ADD_CACHE_IMPLICIT_DOT : 0);
 512
 513         if (require_pathspec && argc == 0) {
 514                 fprintf(stderr, _("Nothing specified, nothing added.\n"));
 515                 fprintf(stderr, _("Maybe you wanted to say 'git add .'?\n"));
 516                 return 0;
 517         }
 518         pathspec = validate_pathspec(argv, prefix);
 519
 520         if (read_cache() < 0)
 521                 die(_("index file corrupt"));
 522         treat_gitlinks(pathspec);
 523
 524         if (add_new_files) {
 525                 int baselen;
 526
 527                 /* Set up the default git porcelain excludes */
 528                 memset(&dir, 0, sizeof(dir));
 529                 if (!ignored_too) {
 530                         dir.flags |= DIR_COLLECT_IGNORED;
 531                         setup_standard_excludes(&dir);
 532                 }
 533
 534                 /* This picks up the paths that are not tracked */
 535                 baselen = fill_directory(&dir, implicit_dot ? NULL : pathspec);
 536                 if (pathspec)
 537                         seen = prune_directory(&dir, pathspec, baselen,
 538                                         implicit_dot ? WARN_IMPLICIT_DOT : 0);
 539         }
 540
 541         if (refresh_only) {
 542                 refresh(verbose, pathspec);
 543                 goto finish;
 544         }
 545         if (implicit_dot && prefix)
 546                 refresh_cache(REFRESH_QUIET);
 547
 548         if (pathspec) {
 549                 int i;
 550
 551                 if (!seen)
 552                         seen = find_pathspecs_matching_against_index(pathspec);
 553                 for (i = 0; pathspec[i]; i++) {
 554                         if (!seen[i] && pathspec[i][0]
 555                             && !file_exists(pathspec[i])) {
 556                                 if (ignore_missing) {
 557                                         int dtype = DT_UNKNOWN;
 558                                         if (is_excluded(&dir, pathspec[i], &dtype))
 559                                                 dir_add_ignored(&dir, pathspec[i], strlen(pathspec[i]));
 560                                 } else
 561                                         die(_("pathspec '%s' did not match any files"),
 562                                             pathspec[i]);
 563                         }
 564                 }
 565                 free(seen);
 566         }
 567
 568         plug_bulk_checkin();
 569
 570         if ((flags & ADD_CACHE_IMPLICIT_DOT) && prefix) {
 571                 /*
 572                  * Check for modified files throughout the worktree so
 573                  * update_callback has a chance to warn about changes
 574                  * outside the cwd.
 575                  */
 576                 update_data.implicit_dot = prefix;
 577                 update_data.implicit_dot_len = strlen(prefix);
 578                 pathspec = NULL;
 579         }
 580         update_data.flags = flags & ~ADD_CACHE_IMPLICIT_DOT;
 581         update_files_in_cache(prefix, pathspec, &update_data);
 582
 583         exit_status |= !!update_data.add_errors;
 584         if (add_new_files)
 585                 exit_status |= add_files(&dir, flags);
 586
 587         unplug_bulk_checkin();
 588
 589  finish:
 590         if (active_cache_changed) {
 591                 if (write_cache(newfd, active_cache, active_nr) ||
 592                     commit_locked_index(&lock_file))
 593                         die(_("Unable to write new index file"));
 594         }
 595
 596         return exit_status;
 597 }