git.oblomov.eu Git - git/blob - builtin/stash.c

   1 #define USE_THE_INDEX_COMPATIBILITY_MACROS
   2 #include "builtin.h"
   3 #include "config.h"
   4 #include "parse-options.h"
   5 #include "refs.h"
   6 #include "lockfile.h"
   7 #include "cache-tree.h"
   8 #include "unpack-trees.h"
   9 #include "merge-recursive.h"
  10 #include "strvec.h"
  11 #include "run-command.h"
  12 #include "dir.h"
  13 #include "rerere.h"
  14 #include "revision.h"
  15 #include "log-tree.h"
  16 #include "diffcore.h"
  17 #include "exec-cmd.h"
  18
  19 #define INCLUDE_ALL_FILES 2
  20
  21 static const char * const git_stash_usage[] = {
  22         N_("git stash list [<options>]"),
  23         N_("git stash show [<options>] [<stash>]"),
  24         N_("git stash drop [-q|--quiet] [<stash>]"),
  25         N_("git stash ( pop | apply ) [--index] [-q|--quiet] [<stash>]"),
  26         N_("git stash branch <branchname> [<stash>]"),
  27         N_("git stash clear"),
  28         N_("git stash [push [-p|--patch] [-k|--[no-]keep-index] [-q|--quiet]\n"
  29            "          [-u|--include-untracked] [-a|--all] [-m|--message <message>]\n"
  30            "          [--pathspec-from-file=<file> [--pathspec-file-nul]]\n"
  31            "          [--] [<pathspec>...]]"),
  32         N_("git stash save [-p|--patch] [-k|--[no-]keep-index] [-q|--quiet]\n"
  33            "          [-u|--include-untracked] [-a|--all] [<message>]"),
  34         NULL
  35 };
  36
  37 static const char * const git_stash_list_usage[] = {
  38         N_("git stash list [<options>]"),
  39         NULL
  40 };
  41
  42 static const char * const git_stash_show_usage[] = {
  43         N_("git stash show [<options>] [<stash>]"),
  44         NULL
  45 };
  46
  47 static const char * const git_stash_drop_usage[] = {
  48         N_("git stash drop [-q|--quiet] [<stash>]"),
  49         NULL
  50 };
  51
  52 static const char * const git_stash_pop_usage[] = {
  53         N_("git stash pop [--index] [-q|--quiet] [<stash>]"),
  54         NULL
  55 };
  56
  57 static const char * const git_stash_apply_usage[] = {
  58         N_("git stash apply [--index] [-q|--quiet] [<stash>]"),
  59         NULL
  60 };
  61
  62 static const char * const git_stash_branch_usage[] = {
  63         N_("git stash branch <branchname> [<stash>]"),
  64         NULL
  65 };
  66
  67 static const char * const git_stash_clear_usage[] = {
  68         N_("git stash clear"),
  69         NULL
  70 };
  71
  72 static const char * const git_stash_store_usage[] = {
  73         N_("git stash store [-m|--message <message>] [-q|--quiet] <commit>"),
  74         NULL
  75 };
  76
  77 static const char * const git_stash_push_usage[] = {
  78         N_("git stash [push [-p|--patch] [-k|--[no-]keep-index] [-q|--quiet]\n"
  79            "          [-u|--include-untracked] [-a|--all] [-m|--message <message>]\n"
  80            "          [--] [<pathspec>...]]"),
  81         NULL
  82 };
  83
  84 static const char * const git_stash_save_usage[] = {
  85         N_("git stash save [-p|--patch] [-k|--[no-]keep-index] [-q|--quiet]\n"
  86            "          [-u|--include-untracked] [-a|--all] [<message>]"),
  87         NULL
  88 };
  89
  90 static const char ref_stash[] = "refs/stash";
  91 static struct strbuf stash_index_path = STRBUF_INIT;
  92
  93 /*
  94  * w_commit is set to the commit containing the working tree
  95  * b_commit is set to the base commit
  96  * i_commit is set to the commit containing the index tree
  97  * u_commit is set to the commit containing the untracked files tree
  98  * w_tree is set to the working tree
  99  * b_tree is set to the base tree
 100  * i_tree is set to the index tree
 101  * u_tree is set to the untracked files tree
 102  */
 103 struct stash_info {
 104         struct object_id w_commit;
 105         struct object_id b_commit;
 106         struct object_id i_commit;
 107         struct object_id u_commit;
 108         struct object_id w_tree;
 109         struct object_id b_tree;
 110         struct object_id i_tree;
 111         struct object_id u_tree;
 112         struct strbuf revision;
 113         int is_stash_ref;
 114         int has_u;
 115 };
 116
 117 static void free_stash_info(struct stash_info *info)
 118 {
 119         strbuf_release(&info->revision);
 120 }
 121
 122 static void assert_stash_like(struct stash_info *info, const char *revision)
 123 {
 124         if (get_oidf(&info->b_commit, "%s^1", revision) ||
 125             get_oidf(&info->w_tree, "%s:", revision) ||
 126             get_oidf(&info->b_tree, "%s^1:", revision) ||
 127             get_oidf(&info->i_tree, "%s^2:", revision))
 128                 die(_("'%s' is not a stash-like commit"), revision);
 129 }
 130
 131 static int get_stash_info(struct stash_info *info, int argc, const char **argv)
 132 {
 133         int ret;
 134         char *end_of_rev;
 135         char *expanded_ref;
 136         const char *revision;
 137         const char *commit = NULL;
 138         struct object_id dummy;
 139         struct strbuf symbolic = STRBUF_INIT;
 140
 141         if (argc > 1) {
 142                 int i;
 143                 struct strbuf refs_msg = STRBUF_INIT;
 144
 145                 for (i = 0; i < argc; i++)
 146                         strbuf_addf(&refs_msg, " '%s'", argv[i]);
 147
 148                 fprintf_ln(stderr, _("Too many revisions specified:%s"),
 149                            refs_msg.buf);
 150                 strbuf_release(&refs_msg);
 151
 152                 return -1;
 153         }
 154
 155         if (argc == 1)
 156                 commit = argv[0];
 157
 158         strbuf_init(&info->revision, 0);
 159         if (!commit) {
 160                 if (!ref_exists(ref_stash)) {
 161                         free_stash_info(info);
 162                         fprintf_ln(stderr, _("No stash entries found."));
 163                         return -1;
 164                 }
 165
 166                 strbuf_addf(&info->revision, "%s@{0}", ref_stash);
 167         } else if (strspn(commit, "0123456789") == strlen(commit)) {
 168                 strbuf_addf(&info->revision, "%s@{%s}", ref_stash, commit);
 169         } else {
 170                 strbuf_addstr(&info->revision, commit);
 171         }
 172
 173         revision = info->revision.buf;
 174
 175         if (get_oid(revision, &info->w_commit)) {
 176                 error(_("%s is not a valid reference"), revision);
 177                 free_stash_info(info);
 178                 return -1;
 179         }
 180
 181         assert_stash_like(info, revision);
 182
 183         info->has_u = !get_oidf(&info->u_tree, "%s^3:", revision);
 184
 185         end_of_rev = strchrnul(revision, '@');
 186         strbuf_add(&symbolic, revision, end_of_rev - revision);
 187
 188         ret = dwim_ref(symbolic.buf, symbolic.len, &dummy, &expanded_ref, 0);
 189         strbuf_release(&symbolic);
 190         switch (ret) {
 191         case 0: /* Not found, but valid ref */
 192                 info->is_stash_ref = 0;
 193                 break;
 194         case 1:
 195                 info->is_stash_ref = !strcmp(expanded_ref, ref_stash);
 196                 break;
 197         default: /* Invalid or ambiguous */
 198                 free_stash_info(info);
 199         }
 200
 201         free(expanded_ref);
 202         return !(ret == 0 || ret == 1);
 203 }
 204
 205 static int do_clear_stash(void)
 206 {
 207         struct object_id obj;
 208         if (get_oid(ref_stash, &obj))
 209                 return 0;
 210
 211         return delete_ref(NULL, ref_stash, &obj, 0);
 212 }
 213
 214 static int clear_stash(int argc, const char **argv, const char *prefix)
 215 {
 216         struct option options[] = {
 217                 OPT_END()
 218         };
 219
 220         argc = parse_options(argc, argv, prefix, options,
 221                              git_stash_clear_usage,
 222                              PARSE_OPT_STOP_AT_NON_OPTION);
 223
 224         if (argc)
 225                 return error(_("git stash clear with arguments is "
 226                                "unimplemented"));
 227
 228         return do_clear_stash();
 229 }
 230
 231 static int reset_tree(struct object_id *i_tree, int update, int reset)
 232 {
 233         int nr_trees = 1;
 234         struct unpack_trees_options opts;
 235         struct tree_desc t[MAX_UNPACK_TREES];
 236         struct tree *tree;
 237         struct lock_file lock_file = LOCK_INIT;
 238
 239         read_cache_preload(NULL);
 240         if (refresh_cache(REFRESH_QUIET))
 241                 return -1;
 242
 243         hold_locked_index(&lock_file, LOCK_DIE_ON_ERROR);
 244
 245         memset(&opts, 0, sizeof(opts));
 246
 247         tree = parse_tree_indirect(i_tree);
 248         if (parse_tree(tree))
 249                 return -1;
 250
 251         init_tree_desc(t, tree->buffer, tree->size);
 252
 253         opts.head_idx = 1;
 254         opts.src_index = &the_index;
 255         opts.dst_index = &the_index;
 256         opts.merge = 1;
 257         opts.reset = reset;
 258         opts.update = update;
 259         opts.fn = oneway_merge;
 260
 261         if (unpack_trees(nr_trees, t, &opts))
 262                 return -1;
 263
 264         if (write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
 265                 return error(_("unable to write new index file"));
 266
 267         return 0;
 268 }
 269
 270 static int diff_tree_binary(struct strbuf *out, struct object_id *w_commit)
 271 {
 272         struct child_process cp = CHILD_PROCESS_INIT;
 273         const char *w_commit_hex = oid_to_hex(w_commit);
 274
 275         /*
 276          * Diff-tree would not be very hard to replace with a native function,
 277          * however it should be done together with apply_cached.
 278          */
 279         cp.git_cmd = 1;
 280         strvec_pushl(&cp.args, "diff-tree", "--binary", NULL);
 281         strvec_pushf(&cp.args, "%s^2^..%s^2", w_commit_hex, w_commit_hex);
 282
 283         return pipe_command(&cp, NULL, 0, out, 0, NULL, 0);
 284 }
 285
 286 static int apply_cached(struct strbuf *out)
 287 {
 288         struct child_process cp = CHILD_PROCESS_INIT;
 289
 290         /*
 291          * Apply currently only reads either from stdin or a file, thus
 292          * apply_all_patches would have to be updated to optionally take a
 293          * buffer.
 294          */
 295         cp.git_cmd = 1;
 296         strvec_pushl(&cp.args, "apply", "--cached", NULL);
 297         return pipe_command(&cp, out->buf, out->len, NULL, 0, NULL, 0);
 298 }
 299
 300 static int reset_head(void)
 301 {
 302         struct child_process cp = CHILD_PROCESS_INIT;
 303
 304         /*
 305          * Reset is overall quite simple, however there is no current public
 306          * API for resetting.
 307          */
 308         cp.git_cmd = 1;
 309         strvec_push(&cp.args, "reset");
 310
 311         return run_command(&cp);
 312 }
 313
 314 static void add_diff_to_buf(struct diff_queue_struct *q,
 315                             struct diff_options *options,
 316                             void *data)
 317 {
 318         int i;
 319
 320         for (i = 0; i < q->nr; i++) {
 321                 strbuf_addstr(data, q->queue[i]->one->path);
 322
 323                 /* NUL-terminate: will be fed to update-index -z */
 324                 strbuf_addch(data, '\0');
 325         }
 326 }
 327
 328 static int restore_untracked(struct object_id *u_tree)
 329 {
 330         int res;
 331         struct child_process cp = CHILD_PROCESS_INIT;
 332
 333         /*
 334          * We need to run restore files from a given index, but without
 335          * affecting the current index, so we use GIT_INDEX_FILE with
 336          * run_command to fork processes that will not interfere.
 337          */
 338         cp.git_cmd = 1;
 339         strvec_push(&cp.args, "read-tree");
 340         strvec_push(&cp.args, oid_to_hex(u_tree));
 341         strvec_pushf(&cp.env_array, "GIT_INDEX_FILE=%s",
 342                      stash_index_path.buf);
 343         if (run_command(&cp)) {
 344                 remove_path(stash_index_path.buf);
 345                 return -1;
 346         }
 347
 348         child_process_init(&cp);
 349         cp.git_cmd = 1;
 350         strvec_pushl(&cp.args, "checkout-index", "--all", NULL);
 351         strvec_pushf(&cp.env_array, "GIT_INDEX_FILE=%s",
 352                      stash_index_path.buf);
 353
 354         res = run_command(&cp);
 355         remove_path(stash_index_path.buf);
 356         return res;
 357 }
 358
 359 static void unstage_changes_unless_new(struct object_id *orig_tree)
 360 {
 361         /*
 362          * When we enter this function, there has been a clean merge of
 363          * relevant trees, and the merge logic always stages whatever merges
 364          * cleanly.  We want to unstage those changes, unless it corresponds
 365          * to a file that didn't exist as of orig_tree.
 366          *
 367          * However, if any SKIP_WORKTREE path is modified relative to
 368          * orig_tree, then we want to clear the SKIP_WORKTREE bit and write
 369          * it to the worktree before unstaging.
 370          */
 371
 372         struct checkout state = CHECKOUT_INIT;
 373         struct diff_options diff_opts;
 374         struct lock_file lock = LOCK_INIT;
 375         int i;
 376
 377         /* If any entries have skip_worktree set, we'll have to check 'em out */
 378         state.force = 1;
 379         state.quiet = 1;
 380         state.refresh_cache = 1;
 381         state.istate = &the_index;
 382
 383         /*
 384          * Step 1: get a difference between orig_tree (which corresponding
 385          * to the index before a merge was run) and the current index
 386          * (reflecting the changes brought in by the merge).
 387          */
 388         diff_setup(&diff_opts);
 389         diff_opts.flags.recursive = 1;
 390         diff_opts.detect_rename = 0;
 391         diff_opts.output_format = DIFF_FORMAT_NO_OUTPUT;
 392         diff_setup_done(&diff_opts);
 393
 394         do_diff_cache(orig_tree, &diff_opts);
 395         diffcore_std(&diff_opts);
 396
 397         /* Iterate over the paths that changed due to the merge... */
 398         for (i = 0; i < diff_queued_diff.nr; i++) {
 399                 struct diff_filepair *p;
 400                 struct cache_entry *ce;
 401                 int pos;
 402
 403                 /* Look up the path's position in the current index. */
 404                 p = diff_queued_diff.queue[i];
 405                 pos = index_name_pos(&the_index, p->two->path,
 406                                      strlen(p->two->path));
 407
 408                 /*
 409                  * Step 2: Place changes in the working tree
 410                  *
 411                  * Stash is about restoring changes *to the working tree*.
 412                  * So if the merge successfully got a new version of some
 413                  * path, but left it out of the working tree, then clear the
 414                  * SKIP_WORKTREE bit and write it to the working tree.
 415                  */
 416                 if (pos >= 0 && ce_skip_worktree(active_cache[pos])) {
 417                         struct stat st;
 418
 419                         ce = active_cache[pos];
 420                         if (!lstat(ce->name, &st)) {
 421                                 /* Conflicting path present; relocate it */
 422                                 struct strbuf new_path = STRBUF_INIT;
 423                                 int fd;
 424
 425                                 strbuf_addf(&new_path,
 426                                             "%s.stash.XXXXXX", ce->name);
 427                                 fd = xmkstemp(new_path.buf);
 428                                 close(fd);
 429                                 printf(_("WARNING: Untracked file in way of "
 430                                          "tracked file!  Renaming\n "
 431                                          "           %s -> %s\n"
 432                                          "         to make room.\n"),
 433                                        ce->name, new_path.buf);
 434                                 if (rename(ce->name, new_path.buf))
 435                                         die("Failed to move %s to %s\n",
 436                                             ce->name, new_path.buf);
 437                                 strbuf_release(&new_path);
 438                         }
 439                         checkout_entry(ce, &state, NULL, NULL);
 440                         ce->ce_flags &= ~CE_SKIP_WORKTREE;
 441                 }
 442
 443                 /*
 444                  * Step 3: "unstage" changes, as long as they are still tracked
 445                  */
 446                 if (p->one->oid_valid) {
 447                         /*
 448                          * Path existed in orig_tree; restore index entry
 449                          * from that tree in order to "unstage" the changes.
 450                          */
 451                         int option = ADD_CACHE_OK_TO_REPLACE;
 452                         if (pos < 0)
 453                                 option = ADD_CACHE_OK_TO_ADD;
 454
 455                         ce = make_cache_entry(&the_index,
 456                                               p->one->mode,
 457                                               &p->one->oid,
 458                                               p->one->path,
 459                                               0, 0);
 460                         add_index_entry(&the_index, ce, option);
 461                 }
 462         }
 463         diff_flush(&diff_opts);
 464
 465         /*
 466          * Step 4: write the new index to disk
 467          */
 468         repo_hold_locked_index(the_repository, &lock, LOCK_DIE_ON_ERROR);
 469         if (write_locked_index(&the_index, &lock,
 470                                COMMIT_LOCK | SKIP_IF_UNCHANGED))
 471                 die(_("Unable to write index."));
 472 }
 473
 474 static int do_apply_stash(const char *prefix, struct stash_info *info,
 475                           int index, int quiet)
 476 {
 477         int ret;
 478         int has_index = index;
 479         struct merge_options o;
 480         struct object_id c_tree;
 481         struct object_id index_tree;
 482         struct commit *result;
 483         const struct object_id *bases[1];
 484
 485         read_cache_preload(NULL);
 486         if (refresh_and_write_cache(REFRESH_QUIET, 0, 0))
 487                 return -1;
 488
 489         if (write_cache_as_tree(&c_tree, 0, NULL))
 490                 return error(_("cannot apply a stash in the middle of a merge"));
 491
 492         if (index) {
 493                 if (oideq(&info->b_tree, &info->i_tree) ||
 494                     oideq(&c_tree, &info->i_tree)) {
 495                         has_index = 0;
 496                 } else {
 497                         struct strbuf out = STRBUF_INIT;
 498
 499                         if (diff_tree_binary(&out, &info->w_commit)) {
 500                                 strbuf_release(&out);
 501                                 return error(_("could not generate diff %s^!."),
 502                                              oid_to_hex(&info->w_commit));
 503                         }
 504
 505                         ret = apply_cached(&out);
 506                         strbuf_release(&out);
 507                         if (ret)
 508                                 return error(_("conflicts in index. "
 509                                                "Try without --index."));
 510
 511                         discard_cache();
 512                         read_cache();
 513                         if (write_cache_as_tree(&index_tree, 0, NULL))
 514                                 return error(_("could not save index tree"));
 515
 516                         reset_head();
 517                         discard_cache();
 518                         read_cache();
 519                 }
 520         }
 521
 522         if (info->has_u && restore_untracked(&info->u_tree))
 523                 return error(_("could not restore untracked files from stash"));
 524
 525         init_merge_options(&o, the_repository);
 526
 527         o.branch1 = "Updated upstream";
 528         o.branch2 = "Stashed changes";
 529
 530         if (oideq(&info->b_tree, &c_tree))
 531                 o.branch1 = "Version stash was based on";
 532
 533         if (quiet)
 534                 o.verbosity = 0;
 535
 536         if (o.verbosity >= 3)
 537                 printf_ln(_("Merging %s with %s"), o.branch1, o.branch2);
 538
 539         bases[0] = &info->b_tree;
 540
 541         ret = merge_recursive_generic(&o, &c_tree, &info->w_tree, 1, bases,
 542                                       &result);
 543         if (ret) {
 544                 rerere(0);
 545
 546                 if (index)
 547                         fprintf_ln(stderr, _("Index was not unstashed."));
 548
 549                 return ret;
 550         }
 551
 552         if (has_index) {
 553                 if (reset_tree(&index_tree, 0, 0))
 554                         return -1;
 555         } else {
 556                 unstage_changes_unless_new(&c_tree);
 557         }
 558
 559         if (!quiet) {
 560                 struct child_process cp = CHILD_PROCESS_INIT;
 561
 562                 /*
 563                  * Status is quite simple and could be replaced with calls to
 564                  * wt_status in the future, but it adds complexities which may
 565                  * require more tests.
 566                  */
 567                 cp.git_cmd = 1;
 568                 cp.dir = prefix;
 569                 strvec_pushf(&cp.env_array, GIT_WORK_TREE_ENVIRONMENT"=%s",
 570                              absolute_path(get_git_work_tree()));
 571                 strvec_pushf(&cp.env_array, GIT_DIR_ENVIRONMENT"=%s",
 572                              absolute_path(get_git_dir()));
 573                 strvec_push(&cp.args, "status");
 574                 run_command(&cp);
 575         }
 576
 577         return 0;
 578 }
 579
 580 static int apply_stash(int argc, const char **argv, const char *prefix)
 581 {
 582         int ret;
 583         int quiet = 0;
 584         int index = 0;
 585         struct stash_info info;
 586         struct option options[] = {
 587                 OPT__QUIET(&quiet, N_("be quiet, only report errors")),
 588                 OPT_BOOL(0, "index", &index,
 589                          N_("attempt to recreate the index")),
 590                 OPT_END()
 591         };
 592
 593         argc = parse_options(argc, argv, prefix, options,
 594                              git_stash_apply_usage, 0);
 595
 596         if (get_stash_info(&info, argc, argv))
 597                 return -1;
 598
 599         ret = do_apply_stash(prefix, &info, index, quiet);
 600         free_stash_info(&info);
 601         return ret;
 602 }
 603
 604 static int reject_reflog_ent(struct object_id *ooid, struct object_id *noid,
 605                              const char *email, timestamp_t timestamp, int tz,
 606                              const char *message, void *cb_data)
 607 {
 608         return 1;
 609 }
 610
 611 static int reflog_is_empty(const char *refname)
 612 {
 613         return !for_each_reflog_ent(refname, reject_reflog_ent, NULL);
 614 }
 615
 616 static int do_drop_stash(struct stash_info *info, int quiet)
 617 {
 618         int ret;
 619         struct child_process cp_reflog = CHILD_PROCESS_INIT;
 620
 621         /*
 622          * reflog does not provide a simple function for deleting refs. One will
 623          * need to be added to avoid implementing too much reflog code here
 624          */
 625
 626         cp_reflog.git_cmd = 1;
 627         strvec_pushl(&cp_reflog.args, "reflog", "delete", "--updateref",
 628                      "--rewrite", NULL);
 629         strvec_push(&cp_reflog.args, info->revision.buf);
 630         ret = run_command(&cp_reflog);
 631         if (!ret) {
 632                 if (!quiet)
 633                         printf_ln(_("Dropped %s (%s)"), info->revision.buf,
 634                                   oid_to_hex(&info->w_commit));
 635         } else {
 636                 return error(_("%s: Could not drop stash entry"),
 637                              info->revision.buf);
 638         }
 639
 640         if (reflog_is_empty(ref_stash))
 641                 do_clear_stash();
 642
 643         return 0;
 644 }
 645
 646 static void assert_stash_ref(struct stash_info *info)
 647 {
 648         if (!info->is_stash_ref) {
 649                 error(_("'%s' is not a stash reference"), info->revision.buf);
 650                 free_stash_info(info);
 651                 exit(1);
 652         }
 653 }
 654
 655 static int drop_stash(int argc, const char **argv, const char *prefix)
 656 {
 657         int ret;
 658         int quiet = 0;
 659         struct stash_info info;
 660         struct option options[] = {
 661                 OPT__QUIET(&quiet, N_("be quiet, only report errors")),
 662                 OPT_END()
 663         };
 664
 665         argc = parse_options(argc, argv, prefix, options,
 666                              git_stash_drop_usage, 0);
 667
 668         if (get_stash_info(&info, argc, argv))
 669                 return -1;
 670
 671         assert_stash_ref(&info);
 672
 673         ret = do_drop_stash(&info, quiet);
 674         free_stash_info(&info);
 675         return ret;
 676 }
 677
 678 static int pop_stash(int argc, const char **argv, const char *prefix)
 679 {
 680         int ret;
 681         int index = 0;
 682         int quiet = 0;
 683         struct stash_info info;
 684         struct option options[] = {
 685                 OPT__QUIET(&quiet, N_("be quiet, only report errors")),
 686                 OPT_BOOL(0, "index", &index,
 687                          N_("attempt to recreate the index")),
 688                 OPT_END()
 689         };
 690
 691         argc = parse_options(argc, argv, prefix, options,
 692                              git_stash_pop_usage, 0);
 693
 694         if (get_stash_info(&info, argc, argv))
 695                 return -1;
 696
 697         assert_stash_ref(&info);
 698         if ((ret = do_apply_stash(prefix, &info, index, quiet)))
 699                 printf_ln(_("The stash entry is kept in case "
 700                             "you need it again."));
 701         else
 702                 ret = do_drop_stash(&info, quiet);
 703
 704         free_stash_info(&info);
 705         return ret;
 706 }
 707
 708 static int branch_stash(int argc, const char **argv, const char *prefix)
 709 {
 710         int ret;
 711         const char *branch = NULL;
 712         struct stash_info info;
 713         struct child_process cp = CHILD_PROCESS_INIT;
 714         struct option options[] = {
 715                 OPT_END()
 716         };
 717
 718         argc = parse_options(argc, argv, prefix, options,
 719                              git_stash_branch_usage, 0);
 720
 721         if (!argc) {
 722                 fprintf_ln(stderr, _("No branch name specified"));
 723                 return -1;
 724         }
 725
 726         branch = argv[0];
 727
 728         if (get_stash_info(&info, argc - 1, argv + 1))
 729                 return -1;
 730
 731         cp.git_cmd = 1;
 732         strvec_pushl(&cp.args, "checkout", "-b", NULL);
 733         strvec_push(&cp.args, branch);
 734         strvec_push(&cp.args, oid_to_hex(&info.b_commit));
 735         ret = run_command(&cp);
 736         if (!ret)
 737                 ret = do_apply_stash(prefix, &info, 1, 0);
 738         if (!ret && info.is_stash_ref)
 739                 ret = do_drop_stash(&info, 0);
 740
 741         free_stash_info(&info);
 742
 743         return ret;
 744 }
 745
 746 static int list_stash(int argc, const char **argv, const char *prefix)
 747 {
 748         struct child_process cp = CHILD_PROCESS_INIT;
 749         struct option options[] = {
 750                 OPT_END()
 751         };
 752
 753         argc = parse_options(argc, argv, prefix, options,
 754                              git_stash_list_usage,
 755                              PARSE_OPT_KEEP_UNKNOWN);
 756
 757         if (!ref_exists(ref_stash))
 758                 return 0;
 759
 760         cp.git_cmd = 1;
 761         strvec_pushl(&cp.args, "log", "--format=%gd: %gs", "-g",
 762                      "--first-parent", "-m", NULL);
 763         strvec_pushv(&cp.args, argv);
 764         strvec_push(&cp.args, ref_stash);
 765         strvec_push(&cp.args, "--");
 766         return run_command(&cp);
 767 }
 768
 769 static int show_stat = 1;
 770 static int show_patch;
 771 static int use_legacy_stash;
 772
 773 static int git_stash_config(const char *var, const char *value, void *cb)
 774 {
 775         if (!strcmp(var, "stash.showstat")) {
 776                 show_stat = git_config_bool(var, value);
 777                 return 0;
 778         }
 779         if (!strcmp(var, "stash.showpatch")) {
 780                 show_patch = git_config_bool(var, value);
 781                 return 0;
 782         }
 783         if (!strcmp(var, "stash.usebuiltin")) {
 784                 use_legacy_stash = !git_config_bool(var, value);
 785                 return 0;
 786         }
 787         return git_diff_basic_config(var, value, cb);
 788 }
 789
 790 static int show_stash(int argc, const char **argv, const char *prefix)
 791 {
 792         int i;
 793         int ret = 0;
 794         struct stash_info info;
 795         struct rev_info rev;
 796         struct strvec stash_args = STRVEC_INIT;
 797         struct strvec revision_args = STRVEC_INIT;
 798         struct option options[] = {
 799                 OPT_END()
 800         };
 801
 802         init_diff_ui_defaults();
 803         git_config(git_diff_ui_config, NULL);
 804         init_revisions(&rev, prefix);
 805
 806         strvec_push(&revision_args, argv[0]);
 807         for (i = 1; i < argc; i++) {
 808                 if (argv[i][0] != '-')
 809                         strvec_push(&stash_args, argv[i]);
 810                 else
 811                         strvec_push(&revision_args, argv[i]);
 812         }
 813
 814         ret = get_stash_info(&info, stash_args.nr, stash_args.v);
 815         strvec_clear(&stash_args);
 816         if (ret)
 817                 return -1;
 818
 819         /*
 820          * The config settings are applied only if there are not passed
 821          * any options.
 822          */
 823         if (revision_args.nr == 1) {
 824                 if (show_stat)
 825                         rev.diffopt.output_format = DIFF_FORMAT_DIFFSTAT;
 826
 827                 if (show_patch)
 828                         rev.diffopt.output_format |= DIFF_FORMAT_PATCH;
 829
 830                 if (!show_stat && !show_patch) {
 831                         free_stash_info(&info);
 832                         return 0;
 833                 }
 834         }
 835
 836         argc = setup_revisions(revision_args.nr, revision_args.v, &rev, NULL);
 837         if (argc > 1) {
 838                 free_stash_info(&info);
 839                 usage_with_options(git_stash_show_usage, options);
 840         }
 841         if (!rev.diffopt.output_format) {
 842                 rev.diffopt.output_format = DIFF_FORMAT_PATCH;
 843                 diff_setup_done(&rev.diffopt);
 844         }
 845
 846         rev.diffopt.flags.recursive = 1;
 847         setup_diff_pager(&rev.diffopt);
 848         diff_tree_oid(&info.b_commit, &info.w_commit, "", &rev.diffopt);
 849         log_tree_diff_flush(&rev);
 850
 851         free_stash_info(&info);
 852         return diff_result_code(&rev.diffopt, 0);
 853 }
 854
 855 static int do_store_stash(const struct object_id *w_commit, const char *stash_msg,
 856                           int quiet)
 857 {
 858         if (!stash_msg)
 859                 stash_msg = "Created via \"git stash store\".";
 860
 861         if (update_ref(stash_msg, ref_stash, w_commit, NULL,
 862                        REF_FORCE_CREATE_REFLOG,
 863                        quiet ? UPDATE_REFS_QUIET_ON_ERR :
 864                        UPDATE_REFS_MSG_ON_ERR)) {
 865                 if (!quiet) {
 866                         fprintf_ln(stderr, _("Cannot update %s with %s"),
 867                                    ref_stash, oid_to_hex(w_commit));
 868                 }
 869                 return -1;
 870         }
 871
 872         return 0;
 873 }
 874
 875 static int store_stash(int argc, const char **argv, const char *prefix)
 876 {
 877         int quiet = 0;
 878         const char *stash_msg = NULL;
 879         struct object_id obj;
 880         struct object_context dummy;
 881         struct option options[] = {
 882                 OPT__QUIET(&quiet, N_("be quiet")),
 883                 OPT_STRING('m', "message", &stash_msg, "message",
 884                            N_("stash message")),
 885                 OPT_END()
 886         };
 887
 888         argc = parse_options(argc, argv, prefix, options,
 889                              git_stash_store_usage,
 890                              PARSE_OPT_KEEP_UNKNOWN);
 891
 892         if (argc != 1) {
 893                 if (!quiet)
 894                         fprintf_ln(stderr, _("\"git stash store\" requires one "
 895                                              "<commit> argument"));
 896                 return -1;
 897         }
 898
 899         if (get_oid_with_context(the_repository,
 900                                  argv[0], quiet ? GET_OID_QUIETLY : 0, &obj,
 901                                  &dummy)) {
 902                 if (!quiet)
 903                         fprintf_ln(stderr, _("Cannot update %s with %s"),
 904                                              ref_stash, argv[0]);
 905                 return -1;
 906         }
 907
 908         return do_store_stash(&obj, stash_msg, quiet);
 909 }
 910
 911 static void add_pathspecs(struct strvec *args,
 912                           const struct pathspec *ps) {
 913         int i;
 914
 915         for (i = 0; i < ps->nr; i++)
 916                 strvec_push(args, ps->items[i].original);
 917 }
 918
 919 /*
 920  * `untracked_files` will be filled with the names of untracked files.
 921  * The return value is:
 922  *
 923  * = 0 if there are not any untracked files
 924  * > 0 if there are untracked files
 925  */
 926 static int get_untracked_files(const struct pathspec *ps, int include_untracked,
 927                                struct strbuf *untracked_files)
 928 {
 929         int i;
 930         int found = 0;
 931         struct dir_struct dir;
 932
 933         dir_init(&dir);
 934         if (include_untracked != INCLUDE_ALL_FILES)
 935                 setup_standard_excludes(&dir);
 936
 937         fill_directory(&dir, the_repository->index, ps);
 938         for (i = 0; i < dir.nr; i++) {
 939                 struct dir_entry *ent = dir.entries[i];
 940                 found++;
 941                 strbuf_addstr(untracked_files, ent->name);
 942                 /* NUL-terminate: will be fed to update-index -z */
 943                 strbuf_addch(untracked_files, '\0');
 944         }
 945
 946         dir_clear(&dir);
 947         return found;
 948 }
 949
 950 /*
 951  * The return value of `check_changes_tracked_files()` can be:
 952  *
 953  * < 0 if there was an error
 954  * = 0 if there are no changes.
 955  * > 0 if there are changes.
 956  */
 957 static int check_changes_tracked_files(const struct pathspec *ps)
 958 {
 959         int result;
 960         struct rev_info rev;
 961         struct object_id dummy;
 962         int ret = 0;
 963
 964         /* No initial commit. */
 965         if (get_oid("HEAD", &dummy))
 966                 return -1;
 967
 968         if (read_cache() < 0)
 969                 return -1;
 970
 971         init_revisions(&rev, NULL);
 972         copy_pathspec(&rev.prune_data, ps);
 973
 974         rev.diffopt.flags.quick = 1;
 975         rev.diffopt.flags.ignore_submodules = 1;
 976         rev.abbrev = 0;
 977
 978         add_head_to_pending(&rev);
 979         diff_setup_done(&rev.diffopt);
 980
 981         result = run_diff_index(&rev, 1);
 982         if (diff_result_code(&rev.diffopt, result)) {
 983                 ret = 1;
 984                 goto done;
 985         }
 986
 987         object_array_clear(&rev.pending);
 988         result = run_diff_files(&rev, 0);
 989         if (diff_result_code(&rev.diffopt, result)) {
 990                 ret = 1;
 991                 goto done;
 992         }
 993
 994 done:
 995         clear_pathspec(&rev.prune_data);
 996         return ret;
 997 }
 998
 999 /*
1000  * The function will fill `untracked_files` with the names of untracked files
1001  * It will return 1 if there were any changes and 0 if there were not.
1002  */
1003 static int check_changes(const struct pathspec *ps, int include_untracked,
1004                          struct strbuf *untracked_files)
1005 {
1006         int ret = 0;
1007         if (check_changes_tracked_files(ps))
1008                 ret = 1;
1009
1010         if (include_untracked && get_untracked_files(ps, include_untracked,
1011                                                      untracked_files))
1012                 ret = 1;
1013
1014         return ret;
1015 }
1016
1017 static int save_untracked_files(struct stash_info *info, struct strbuf *msg,
1018                                 struct strbuf files)
1019 {
1020         int ret = 0;
1021         struct strbuf untracked_msg = STRBUF_INIT;
1022         struct child_process cp_upd_index = CHILD_PROCESS_INIT;
1023         struct index_state istate = { NULL };
1024
1025         cp_upd_index.git_cmd = 1;
1026         strvec_pushl(&cp_upd_index.args, "update-index", "-z", "--add",
1027                      "--remove", "--stdin", NULL);
1028         strvec_pushf(&cp_upd_index.env_array, "GIT_INDEX_FILE=%s",
1029                          stash_index_path.buf);
1030
1031         strbuf_addf(&untracked_msg, "untracked files on %s\n", msg->buf);
1032         if (pipe_command(&cp_upd_index, files.buf, files.len, NULL, 0,
1033                          NULL, 0)) {
1034                 ret = -1;
1035                 goto done;
1036         }
1037
1038         if (write_index_as_tree(&info->u_tree, &istate, stash_index_path.buf, 0,
1039                                 NULL)) {
1040                 ret = -1;
1041                 goto done;
1042         }
1043
1044         if (commit_tree(untracked_msg.buf, untracked_msg.len,
1045                         &info->u_tree, NULL, &info->u_commit, NULL, NULL)) {
1046                 ret = -1;
1047                 goto done;
1048         }
1049
1050 done:
1051         discard_index(&istate);
1052         strbuf_release(&untracked_msg);
1053         remove_path(stash_index_path.buf);
1054         return ret;
1055 }
1056
1057 static int stash_patch(struct stash_info *info, const struct pathspec *ps,
1058                        struct strbuf *out_patch, int quiet)
1059 {
1060         int ret = 0;
1061         struct child_process cp_read_tree = CHILD_PROCESS_INIT;
1062         struct child_process cp_diff_tree = CHILD_PROCESS_INIT;
1063         struct index_state istate = { NULL };
1064         char *old_index_env = NULL, *old_repo_index_file;
1065
1066         remove_path(stash_index_path.buf);
1067
1068         cp_read_tree.git_cmd = 1;
1069         strvec_pushl(&cp_read_tree.args, "read-tree", "HEAD", NULL);
1070         strvec_pushf(&cp_read_tree.env_array, "GIT_INDEX_FILE=%s",
1071                      stash_index_path.buf);
1072         if (run_command(&cp_read_tree)) {
1073                 ret = -1;
1074                 goto done;
1075         }
1076
1077         /* Find out what the user wants. */
1078         old_repo_index_file = the_repository->index_file;
1079         the_repository->index_file = stash_index_path.buf;
1080         old_index_env = xstrdup_or_null(getenv(INDEX_ENVIRONMENT));
1081         setenv(INDEX_ENVIRONMENT, the_repository->index_file, 1);
1082
1083         ret = run_add_interactive(NULL, "--patch=stash", ps);
1084
1085         the_repository->index_file = old_repo_index_file;
1086         if (old_index_env && *old_index_env)
1087                 setenv(INDEX_ENVIRONMENT, old_index_env, 1);
1088         else
1089                 unsetenv(INDEX_ENVIRONMENT);
1090         FREE_AND_NULL(old_index_env);
1091
1092         /* State of the working tree. */
1093         if (write_index_as_tree(&info->w_tree, &istate, stash_index_path.buf, 0,
1094                                 NULL)) {
1095                 ret = -1;
1096                 goto done;
1097         }
1098
1099         cp_diff_tree.git_cmd = 1;
1100         strvec_pushl(&cp_diff_tree.args, "diff-tree", "-p", "-U1", "HEAD",
1101                      oid_to_hex(&info->w_tree), "--", NULL);
1102         if (pipe_command(&cp_diff_tree, NULL, 0, out_patch, 0, NULL, 0)) {
1103                 ret = -1;
1104                 goto done;
1105         }
1106
1107         if (!out_patch->len) {
1108                 if (!quiet)
1109                         fprintf_ln(stderr, _("No changes selected"));
1110                 ret = 1;
1111         }
1112
1113 done:
1114         discard_index(&istate);
1115         remove_path(stash_index_path.buf);
1116         return ret;
1117 }
1118
1119 static int stash_working_tree(struct stash_info *info, const struct pathspec *ps)
1120 {
1121         int ret = 0;
1122         struct rev_info rev;
1123         struct child_process cp_upd_index = CHILD_PROCESS_INIT;
1124         struct strbuf diff_output = STRBUF_INIT;
1125         struct index_state istate = { NULL };
1126
1127         init_revisions(&rev, NULL);
1128         copy_pathspec(&rev.prune_data, ps);
1129
1130         set_alternate_index_output(stash_index_path.buf);
1131         if (reset_tree(&info->i_tree, 0, 0)) {
1132                 ret = -1;
1133                 goto done;
1134         }
1135         set_alternate_index_output(NULL);
1136
1137         rev.diffopt.output_format = DIFF_FORMAT_CALLBACK;
1138         rev.diffopt.format_callback = add_diff_to_buf;
1139         rev.diffopt.format_callback_data = &diff_output;
1140
1141         if (read_cache_preload(&rev.diffopt.pathspec) < 0) {
1142                 ret = -1;
1143                 goto done;
1144         }
1145
1146         add_pending_object(&rev, parse_object(the_repository, &info->b_commit),
1147                            "");
1148         if (run_diff_index(&rev, 0)) {
1149                 ret = -1;
1150                 goto done;
1151         }
1152
1153         cp_upd_index.git_cmd = 1;
1154         strvec_pushl(&cp_upd_index.args, "update-index",
1155                      "--ignore-skip-worktree-entries",
1156                      "-z", "--add", "--remove", "--stdin", NULL);
1157         strvec_pushf(&cp_upd_index.env_array, "GIT_INDEX_FILE=%s",
1158                      stash_index_path.buf);
1159
1160         if (pipe_command(&cp_upd_index, diff_output.buf, diff_output.len,
1161                          NULL, 0, NULL, 0)) {
1162                 ret = -1;
1163                 goto done;
1164         }
1165
1166         if (write_index_as_tree(&info->w_tree, &istate, stash_index_path.buf, 0,
1167                                 NULL)) {
1168                 ret = -1;
1169                 goto done;
1170         }
1171
1172 done:
1173         discard_index(&istate);
1174         UNLEAK(rev);
1175         object_array_clear(&rev.pending);
1176         clear_pathspec(&rev.prune_data);
1177         strbuf_release(&diff_output);
1178         remove_path(stash_index_path.buf);
1179         return ret;
1180 }
1181
1182 static int do_create_stash(const struct pathspec *ps, struct strbuf *stash_msg_buf,
1183                            int include_untracked, int patch_mode,
1184                            struct stash_info *info, struct strbuf *patch,
1185                            int quiet)
1186 {
1187         int ret = 0;
1188         int flags = 0;
1189         int untracked_commit_option = 0;
1190         const char *head_short_sha1 = NULL;
1191         const char *branch_ref = NULL;
1192         const char *branch_name = "(no branch)";
1193         struct commit *head_commit = NULL;
1194         struct commit_list *parents = NULL;
1195         struct strbuf msg = STRBUF_INIT;
1196         struct strbuf commit_tree_label = STRBUF_INIT;
1197         struct strbuf untracked_files = STRBUF_INIT;
1198
1199         prepare_fallback_ident("git stash", "git@stash");
1200
1201         read_cache_preload(NULL);
1202         if (refresh_and_write_cache(REFRESH_QUIET, 0, 0) < 0) {
1203                 ret = -1;
1204                 goto done;
1205         }
1206
1207         if (get_oid("HEAD", &info->b_commit)) {
1208                 if (!quiet)
1209                         fprintf_ln(stderr, _("You do not have "
1210                                              "the initial commit yet"));
1211                 ret = -1;
1212                 goto done;
1213         } else {
1214                 head_commit = lookup_commit(the_repository, &info->b_commit);
1215         }
1216
1217         if (!check_changes(ps, include_untracked, &untracked_files)) {
1218                 ret = 1;
1219                 goto done;
1220         }
1221
1222         branch_ref = resolve_ref_unsafe("HEAD", 0, NULL, &flags);
1223         if (flags & REF_ISSYMREF)
1224                 branch_name = strrchr(branch_ref, '/') + 1;
1225         head_short_sha1 = find_unique_abbrev(&head_commit->object.oid,
1226                                              DEFAULT_ABBREV);
1227         strbuf_addf(&msg, "%s: %s ", branch_name, head_short_sha1);
1228         pp_commit_easy(CMIT_FMT_ONELINE, head_commit, &msg);
1229
1230         strbuf_addf(&commit_tree_label, "index on %s\n", msg.buf);
1231         commit_list_insert(head_commit, &parents);
1232         if (write_cache_as_tree(&info->i_tree, 0, NULL) ||
1233             commit_tree(commit_tree_label.buf, commit_tree_label.len,
1234                         &info->i_tree, parents, &info->i_commit, NULL, NULL)) {
1235                 if (!quiet)
1236                         fprintf_ln(stderr, _("Cannot save the current "
1237                                              "index state"));
1238                 ret = -1;
1239                 goto done;
1240         }
1241
1242         if (include_untracked) {
1243                 if (save_untracked_files(info, &msg, untracked_files)) {
1244                         if (!quiet)
1245                                 fprintf_ln(stderr, _("Cannot save "
1246                                                      "the untracked files"));
1247                         ret = -1;
1248                         goto done;
1249                 }
1250                 untracked_commit_option = 1;
1251         }
1252         if (patch_mode) {
1253                 ret = stash_patch(info, ps, patch, quiet);
1254                 if (ret < 0) {
1255                         if (!quiet)
1256                                 fprintf_ln(stderr, _("Cannot save the current "
1257                                                      "worktree state"));
1258                         goto done;
1259                 } else if (ret > 0) {
1260                         goto done;
1261                 }
1262         } else {
1263                 if (stash_working_tree(info, ps)) {
1264                         if (!quiet)
1265                                 fprintf_ln(stderr, _("Cannot save the current "
1266                                                      "worktree state"));
1267                         ret = -1;
1268                         goto done;
1269                 }
1270         }
1271
1272         if (!stash_msg_buf->len)
1273                 strbuf_addf(stash_msg_buf, "WIP on %s", msg.buf);
1274         else
1275                 strbuf_insertf(stash_msg_buf, 0, "On %s: ", branch_name);
1276
1277         /*
1278          * `parents` will be empty after calling `commit_tree()`, so there is
1279          * no need to call `free_commit_list()`
1280          */
1281         parents = NULL;
1282         if (untracked_commit_option)
1283                 commit_list_insert(lookup_commit(the_repository,
1284                                                  &info->u_commit),
1285                                    &parents);
1286         commit_list_insert(lookup_commit(the_repository, &info->i_commit),
1287                            &parents);
1288         commit_list_insert(head_commit, &parents);
1289
1290         if (commit_tree(stash_msg_buf->buf, stash_msg_buf->len, &info->w_tree,
1291                         parents, &info->w_commit, NULL, NULL)) {
1292                 if (!quiet)
1293                         fprintf_ln(stderr, _("Cannot record "
1294                                              "working tree state"));
1295                 ret = -1;
1296                 goto done;
1297         }
1298
1299 done:
1300         strbuf_release(&commit_tree_label);
1301         strbuf_release(&msg);
1302         strbuf_release(&untracked_files);
1303         return ret;
1304 }
1305
1306 static int create_stash(int argc, const char **argv, const char *prefix)
1307 {
1308         int ret = 0;
1309         struct strbuf stash_msg_buf = STRBUF_INIT;
1310         struct stash_info info;
1311         struct pathspec ps;
1312
1313         /* Starting with argv[1], since argv[0] is "create" */
1314         strbuf_join_argv(&stash_msg_buf, argc - 1, ++argv, ' ');
1315
1316         memset(&ps, 0, sizeof(ps));
1317         if (!check_changes_tracked_files(&ps))
1318                 return 0;
1319
1320         ret = do_create_stash(&ps, &stash_msg_buf, 0, 0, &info,
1321                               NULL, 0);
1322         if (!ret)
1323                 printf_ln("%s", oid_to_hex(&info.w_commit));
1324
1325         strbuf_release(&stash_msg_buf);
1326         return ret;
1327 }
1328
1329 static int do_push_stash(const struct pathspec *ps, const char *stash_msg, int quiet,
1330                          int keep_index, int patch_mode, int include_untracked)
1331 {
1332         int ret = 0;
1333         struct stash_info info;
1334         struct strbuf patch = STRBUF_INIT;
1335         struct strbuf stash_msg_buf = STRBUF_INIT;
1336         struct strbuf untracked_files = STRBUF_INIT;
1337
1338         if (patch_mode && keep_index == -1)
1339                 keep_index = 1;
1340
1341         if (patch_mode && include_untracked) {
1342                 fprintf_ln(stderr, _("Can't use --patch and --include-untracked"
1343                                      " or --all at the same time"));
1344                 ret = -1;
1345                 goto done;
1346         }
1347
1348         read_cache_preload(NULL);
1349         if (!include_untracked && ps->nr) {
1350                 int i;
1351                 char *ps_matched = xcalloc(ps->nr, 1);
1352
1353                 for (i = 0; i < active_nr; i++)
1354                         ce_path_match(&the_index, active_cache[i], ps,
1355                                       ps_matched);
1356
1357                 if (report_path_error(ps_matched, ps)) {
1358                         fprintf_ln(stderr, _("Did you forget to 'git add'?"));
1359                         ret = -1;
1360                         free(ps_matched);
1361                         goto done;
1362                 }
1363                 free(ps_matched);
1364         }
1365
1366         if (refresh_and_write_cache(REFRESH_QUIET, 0, 0)) {
1367                 ret = -1;
1368                 goto done;
1369         }
1370
1371         if (!check_changes(ps, include_untracked, &untracked_files)) {
1372                 if (!quiet)
1373                         printf_ln(_("No local changes to save"));
1374                 goto done;
1375         }
1376
1377         if (!reflog_exists(ref_stash) && do_clear_stash()) {
1378                 ret = -1;
1379                 if (!quiet)
1380                         fprintf_ln(stderr, _("Cannot initialize stash"));
1381                 goto done;
1382         }
1383
1384         if (stash_msg)
1385                 strbuf_addstr(&stash_msg_buf, stash_msg);
1386         if (do_create_stash(ps, &stash_msg_buf, include_untracked, patch_mode,
1387                             &info, &patch, quiet)) {
1388                 ret = -1;
1389                 goto done;
1390         }
1391
1392         if (do_store_stash(&info.w_commit, stash_msg_buf.buf, 1)) {
1393                 ret = -1;
1394                 if (!quiet)
1395                         fprintf_ln(stderr, _("Cannot save the current status"));
1396                 goto done;
1397         }
1398
1399         if (!quiet)
1400                 printf_ln(_("Saved working directory and index state %s"),
1401                           stash_msg_buf.buf);
1402
1403         if (!patch_mode) {
1404                 if (include_untracked && !ps->nr) {
1405                         struct child_process cp = CHILD_PROCESS_INIT;
1406
1407                         cp.git_cmd = 1;
1408                         strvec_pushl(&cp.args, "clean", "--force",
1409                                      "--quiet", "-d", NULL);
1410                         if (include_untracked == INCLUDE_ALL_FILES)
1411                                 strvec_push(&cp.args, "-x");
1412                         if (run_command(&cp)) {
1413                                 ret = -1;
1414                                 goto done;
1415                         }
1416                 }
1417                 discard_cache();
1418                 if (ps->nr) {
1419                         struct child_process cp_add = CHILD_PROCESS_INIT;
1420                         struct child_process cp_diff = CHILD_PROCESS_INIT;
1421                         struct child_process cp_apply = CHILD_PROCESS_INIT;
1422                         struct strbuf out = STRBUF_INIT;
1423
1424                         cp_add.git_cmd = 1;
1425                         strvec_push(&cp_add.args, "add");
1426                         if (!include_untracked)
1427                                 strvec_push(&cp_add.args, "-u");
1428                         if (include_untracked == INCLUDE_ALL_FILES)
1429                                 strvec_push(&cp_add.args, "--force");
1430                         strvec_push(&cp_add.args, "--");
1431                         add_pathspecs(&cp_add.args, ps);
1432                         if (run_command(&cp_add)) {
1433                                 ret = -1;
1434                                 goto done;
1435                         }
1436
1437                         cp_diff.git_cmd = 1;
1438                         strvec_pushl(&cp_diff.args, "diff-index", "-p",
1439                                      "--cached", "--binary", "HEAD", "--",
1440                                      NULL);
1441                         add_pathspecs(&cp_diff.args, ps);
1442                         if (pipe_command(&cp_diff, NULL, 0, &out, 0, NULL, 0)) {
1443                                 ret = -1;
1444                                 goto done;
1445                         }
1446
1447                         cp_apply.git_cmd = 1;
1448                         strvec_pushl(&cp_apply.args, "apply", "--index",
1449                                      "-R", NULL);
1450                         if (pipe_command(&cp_apply, out.buf, out.len, NULL, 0,
1451                                          NULL, 0)) {
1452                                 ret = -1;
1453                                 goto done;
1454                         }
1455                 } else {
1456                         struct child_process cp = CHILD_PROCESS_INIT;
1457                         cp.git_cmd = 1;
1458                         strvec_pushl(&cp.args, "reset", "--hard", "-q",
1459                                      "--no-recurse-submodules", NULL);
1460                         if (run_command(&cp)) {
1461                                 ret = -1;
1462                                 goto done;
1463                         }
1464                 }
1465
1466                 if (keep_index == 1 && !is_null_oid(&info.i_tree)) {
1467                         struct child_process cp = CHILD_PROCESS_INIT;
1468
1469                         cp.git_cmd = 1;
1470                         strvec_pushl(&cp.args, "checkout", "--no-overlay",
1471                                      oid_to_hex(&info.i_tree), "--", NULL);
1472                         if (!ps->nr)
1473                                 strvec_push(&cp.args, ":/");
1474                         else
1475                                 add_pathspecs(&cp.args, ps);
1476                         if (run_command(&cp)) {
1477                                 ret = -1;
1478                                 goto done;
1479                         }
1480                 }
1481                 goto done;
1482         } else {
1483                 struct child_process cp = CHILD_PROCESS_INIT;
1484
1485                 cp.git_cmd = 1;
1486                 strvec_pushl(&cp.args, "apply", "-R", NULL);
1487
1488                 if (pipe_command(&cp, patch.buf, patch.len, NULL, 0, NULL, 0)) {
1489                         if (!quiet)
1490                                 fprintf_ln(stderr, _("Cannot remove "
1491                                                      "worktree changes"));
1492                         ret = -1;
1493                         goto done;
1494                 }
1495
1496                 if (keep_index < 1) {
1497                         struct child_process cp = CHILD_PROCESS_INIT;
1498
1499                         cp.git_cmd = 1;
1500                         strvec_pushl(&cp.args, "reset", "-q", "--", NULL);
1501                         add_pathspecs(&cp.args, ps);
1502                         if (run_command(&cp)) {
1503                                 ret = -1;
1504                                 goto done;
1505                         }
1506                 }
1507                 goto done;
1508         }
1509
1510 done:
1511         strbuf_release(&stash_msg_buf);
1512         return ret;
1513 }
1514
1515 static int push_stash(int argc, const char **argv, const char *prefix,
1516                       int push_assumed)
1517 {
1518         int force_assume = 0;
1519         int keep_index = -1;
1520         int patch_mode = 0;
1521         int include_untracked = 0;
1522         int quiet = 0;
1523         int pathspec_file_nul = 0;
1524         const char *stash_msg = NULL;
1525         const char *pathspec_from_file = NULL;
1526         struct pathspec ps;
1527         struct option options[] = {
1528                 OPT_BOOL('k', "keep-index", &keep_index,
1529                          N_("keep index")),
1530                 OPT_BOOL('p', "patch", &patch_mode,
1531                          N_("stash in patch mode")),
1532                 OPT__QUIET(&quiet, N_("quiet mode")),
1533                 OPT_BOOL('u', "include-untracked", &include_untracked,
1534                          N_("include untracked files in stash")),
1535                 OPT_SET_INT('a', "all", &include_untracked,
1536                             N_("include ignore files"), 2),
1537                 OPT_STRING('m', "message", &stash_msg, N_("message"),
1538                            N_("stash message")),
1539                 OPT_PATHSPEC_FROM_FILE(&pathspec_from_file),
1540                 OPT_PATHSPEC_FILE_NUL(&pathspec_file_nul),
1541                 OPT_END()
1542         };
1543
1544         if (argc) {
1545                 force_assume = !strcmp(argv[0], "-p");
1546                 argc = parse_options(argc, argv, prefix, options,
1547                                      git_stash_push_usage,
1548                                      PARSE_OPT_KEEP_DASHDASH);
1549         }
1550
1551         if (argc) {
1552                 if (!strcmp(argv[0], "--")) {
1553                         argc--;
1554                         argv++;
1555                 } else if (push_assumed && !force_assume) {
1556                         die("subcommand wasn't specified; 'push' can't be assumed due to unexpected token '%s'",
1557                             argv[0]);
1558                 }
1559         }
1560
1561         parse_pathspec(&ps, 0, PATHSPEC_PREFER_FULL | PATHSPEC_PREFIX_ORIGIN,
1562                        prefix, argv);
1563
1564         if (pathspec_from_file) {
1565                 if (patch_mode)
1566                         die(_("--pathspec-from-file is incompatible with --patch"));
1567
1568                 if (ps.nr)
1569                         die(_("--pathspec-from-file is incompatible with pathspec arguments"));
1570
1571                 parse_pathspec_file(&ps, 0,
1572                                     PATHSPEC_PREFER_FULL | PATHSPEC_PREFIX_ORIGIN,
1573                                     prefix, pathspec_from_file, pathspec_file_nul);
1574         } else if (pathspec_file_nul) {
1575                 die(_("--pathspec-file-nul requires --pathspec-from-file"));
1576         }
1577
1578         return do_push_stash(&ps, stash_msg, quiet, keep_index, patch_mode,
1579                              include_untracked);
1580 }
1581
1582 static int save_stash(int argc, const char **argv, const char *prefix)
1583 {
1584         int keep_index = -1;
1585         int patch_mode = 0;
1586         int include_untracked = 0;
1587         int quiet = 0;
1588         int ret = 0;
1589         const char *stash_msg = NULL;
1590         struct pathspec ps;
1591         struct strbuf stash_msg_buf = STRBUF_INIT;
1592         struct option options[] = {
1593                 OPT_BOOL('k', "keep-index", &keep_index,
1594                          N_("keep index")),
1595                 OPT_BOOL('p', "patch", &patch_mode,
1596                          N_("stash in patch mode")),
1597                 OPT__QUIET(&quiet, N_("quiet mode")),
1598                 OPT_BOOL('u', "include-untracked", &include_untracked,
1599                          N_("include untracked files in stash")),
1600                 OPT_SET_INT('a', "all", &include_untracked,
1601                             N_("include ignore files"), 2),
1602                 OPT_STRING('m', "message", &stash_msg, "message",
1603                            N_("stash message")),
1604                 OPT_END()
1605         };
1606
1607         argc = parse_options(argc, argv, prefix, options,
1608                              git_stash_save_usage,
1609                              PARSE_OPT_KEEP_DASHDASH);
1610
1611         if (argc)
1612                 stash_msg = strbuf_join_argv(&stash_msg_buf, argc, argv, ' ');
1613
1614         memset(&ps, 0, sizeof(ps));
1615         ret = do_push_stash(&ps, stash_msg, quiet, keep_index,
1616                             patch_mode, include_untracked);
1617
1618         strbuf_release(&stash_msg_buf);
1619         return ret;
1620 }
1621
1622 int cmd_stash(int argc, const char **argv, const char *prefix)
1623 {
1624         pid_t pid = getpid();
1625         const char *index_file;
1626         struct strvec args = STRVEC_INIT;
1627
1628         struct option options[] = {
1629                 OPT_END()
1630         };
1631
1632         git_config(git_stash_config, NULL);
1633
1634         if (use_legacy_stash ||
1635             !git_env_bool("GIT_TEST_STASH_USE_BUILTIN", -1))
1636                 warning(_("the stash.useBuiltin support has been removed!\n"
1637                           "See its entry in 'git help config' for details."));
1638
1639         argc = parse_options(argc, argv, prefix, options, git_stash_usage,
1640                              PARSE_OPT_KEEP_UNKNOWN | PARSE_OPT_KEEP_DASHDASH);
1641
1642         index_file = get_index_file();
1643         strbuf_addf(&stash_index_path, "%s.stash.%" PRIuMAX, index_file,
1644                     (uintmax_t)pid);
1645
1646         if (!argc)
1647                 return !!push_stash(0, NULL, prefix, 0);
1648         else if (!strcmp(argv[0], "apply"))
1649                 return !!apply_stash(argc, argv, prefix);
1650         else if (!strcmp(argv[0], "clear"))
1651                 return !!clear_stash(argc, argv, prefix);
1652         else if (!strcmp(argv[0], "drop"))
1653                 return !!drop_stash(argc, argv, prefix);
1654         else if (!strcmp(argv[0], "pop"))
1655                 return !!pop_stash(argc, argv, prefix);
1656         else if (!strcmp(argv[0], "branch"))
1657                 return !!branch_stash(argc, argv, prefix);
1658         else if (!strcmp(argv[0], "list"))
1659                 return !!list_stash(argc, argv, prefix);
1660         else if (!strcmp(argv[0], "show"))
1661                 return !!show_stash(argc, argv, prefix);
1662         else if (!strcmp(argv[0], "store"))
1663                 return !!store_stash(argc, argv, prefix);
1664         else if (!strcmp(argv[0], "create"))
1665                 return !!create_stash(argc, argv, prefix);
1666         else if (!strcmp(argv[0], "push"))
1667                 return !!push_stash(argc, argv, prefix, 0);
1668         else if (!strcmp(argv[0], "save"))
1669                 return !!save_stash(argc, argv, prefix);
1670         else if (*argv[0] != '-')
1671                 usage_msg_opt(xstrfmt(_("unknown subcommand: %s"), argv[0]),
1672                               git_stash_usage, options);
1673
1674         /* Assume 'stash push' */
1675         strvec_push(&args, "push");
1676         strvec_pushv(&args, argv);
1677         return !!push_stash(args.nr, args.v, prefix, 1);
1678 }