builtin/notes.c

   1 /*
   2  * Builtin "git notes"
   3  *
   4  * Copyright (c) 2010 Johan Herland <johan@herland.net>
   5  *
   6  * Based on git-notes.sh by Johannes Schindelin,
   7  * and builtin/tag.c by Kristian Høgsberg and Carlos Rica.
   8  */
   9
  10 #include "cache.h"
  11 #include "config.h"
  12 #include "builtin.h"
  13 #include "notes.h"
  14 #include "blob.h"
  15 #include "commit.h"
  16 #include "refs.h"
  17 #include "exec_cmd.h"
  18 #include "run-command.h"
  19 #include "parse-options.h"
  20 #include "string-list.h"
  21 #include "notes-merge.h"
  22 #include "notes-utils.h"
  23 #include "worktree.h"
  24
  25 static const char * const git_notes_usage[] = {
  26         N_("git notes [--ref <notes-ref>] [list [<object>]]"),
  27         N_("git notes [--ref <notes-ref>] add [-f] [--allow-empty] [-m <msg> | -F <file> | (-c | -C) <object>] [<object>]"),
  28         N_("git notes [--ref <notes-ref>] copy [-f] <from-object> <to-object>"),
  29         N_("git notes [--ref <notes-ref>] append [--allow-empty] [-m <msg> | -F <file> | (-c | -C) <object>] [<object>]"),
  30         N_("git notes [--ref <notes-ref>] edit [--allow-empty] [<object>]"),
  31         N_("git notes [--ref <notes-ref>] show [<object>]"),
  32         N_("git notes [--ref <notes-ref>] merge [-v | -q] [-s <strategy>] <notes-ref>"),
  33         N_("git notes merge --commit [-v | -q]"),
  34         N_("git notes merge --abort [-v | -q]"),
  35         N_("git notes [--ref <notes-ref>] remove [<object>...]"),
  36         N_("git notes [--ref <notes-ref>] prune [-n | -v]"),
  37         N_("git notes [--ref <notes-ref>] get-ref"),
  38         NULL
  39 };
  40
  41 static const char * const git_notes_list_usage[] = {
  42         N_("git notes [list [<object>]]"),
  43         NULL
  44 };
  45
  46 static const char * const git_notes_add_usage[] = {
  47         N_("git notes add [<options>] [<object>]"),
  48         NULL
  49 };
  50
  51 static const char * const git_notes_copy_usage[] = {
  52         N_("git notes copy [<options>] <from-object> <to-object>"),
  53         N_("git notes copy --stdin [<from-object> <to-object>]..."),
  54         NULL
  55 };
  56
  57 static const char * const git_notes_append_usage[] = {
  58         N_("git notes append [<options>] [<object>]"),
  59         NULL
  60 };
  61
  62 static const char * const git_notes_edit_usage[] = {
  63         N_("git notes edit [<object>]"),
  64         NULL
  65 };
  66
  67 static const char * const git_notes_show_usage[] = {
  68         N_("git notes show [<object>]"),
  69         NULL
  70 };
  71
  72 static const char * const git_notes_merge_usage[] = {
  73         N_("git notes merge [<options>] <notes-ref>"),
  74         N_("git notes merge --commit [<options>]"),
  75         N_("git notes merge --abort [<options>]"),
  76         NULL
  77 };
  78
  79 static const char * const git_notes_remove_usage[] = {
  80         N_("git notes remove [<object>]"),
  81         NULL
  82 };
  83
  84 static const char * const git_notes_prune_usage[] = {
  85         N_("git notes prune [<options>]"),
  86         NULL
  87 };
  88
  89 static const char * const git_notes_get_ref_usage[] = {
  90         N_("git notes get-ref"),
  91         NULL
  92 };
  93
  94 static const char note_template[] =
  95         N_("Write/edit the notes for the following object:");
  96
  97 struct note_data {
  98         int given;
  99         int use_editor;
 100         char *edit_path;
 101         struct strbuf buf;
 102 };
 103
 104 static void free_note_data(struct note_data *d)
 105 {
 106         if (d->edit_path) {
 107                 unlink_or_warn(d->edit_path);
 108                 free(d->edit_path);
 109         }
 110         strbuf_release(&d->buf);
 111 }
 112
 113 static int list_each_note(const struct object_id *object_oid,
 114                 const struct object_id *note_oid, char *note_path,
 115                 void *cb_data)
 116 {
 117         printf("%s %s\n", oid_to_hex(note_oid), oid_to_hex(object_oid));
 118         return 0;
 119 }
 120
 121 static void copy_obj_to_fd(int fd, const unsigned char *sha1)
 122 {
 123         unsigned long size;
 124         enum object_type type;
 125         char *buf = read_sha1_file(sha1, &type, &size);
 126         if (buf) {
 127                 if (size)
 128                         write_or_die(fd, buf, size);
 129                 free(buf);
 130         }
 131 }
 132
 133 static void write_commented_object(int fd, const struct object_id *object)
 134 {
 135         const char *show_args[5] =
 136                 {"show", "--stat", "--no-notes", oid_to_hex(object), NULL};
 137         struct child_process show = CHILD_PROCESS_INIT;
 138         struct strbuf buf = STRBUF_INIT;
 139         struct strbuf cbuf = STRBUF_INIT;
 140
 141         /* Invoke "git show --stat --no-notes $object" */
 142         show.argv = show_args;
 143         show.no_stdin = 1;
 144         show.out = -1;
 145         show.err = 0;
 146         show.git_cmd = 1;
 147         if (start_command(&show))
 148                 die(_("unable to start 'show' for object '%s'"),
 149                     oid_to_hex(object));
 150
 151         if (strbuf_read(&buf, show.out, 0) < 0)
 152                 die_errno(_("could not read 'show' output"));
 153         strbuf_add_commented_lines(&cbuf, buf.buf, buf.len);
 154         write_or_die(fd, cbuf.buf, cbuf.len);
 155
 156         strbuf_release(&cbuf);
 157         strbuf_release(&buf);
 158
 159         if (finish_command(&show))
 160                 die(_("failed to finish 'show' for object '%s'"),
 161                     oid_to_hex(object));
 162 }
 163
 164 static void prepare_note_data(const struct object_id *object, struct note_data *d,
 165                 const unsigned char *old_note)
 166 {
 167         if (d->use_editor || !d->given) {
 168                 int fd;
 169                 struct strbuf buf = STRBUF_INIT;
 170
 171                 /* write the template message before editing: */
 172                 d->edit_path = git_pathdup("NOTES_EDITMSG");
 173                 fd = open(d->edit_path, O_CREAT | O_TRUNC | O_WRONLY, 0600);
 174                 if (fd < 0)
 175                         die_errno(_("could not create file '%s'"), d->edit_path);
 176
 177                 if (d->given)
 178                         write_or_die(fd, d->buf.buf, d->buf.len);
 179                 else if (old_note)
 180                         copy_obj_to_fd(fd, old_note);
 181
 182                 strbuf_addch(&buf, '\n');
 183                 strbuf_add_commented_lines(&buf, "\n", strlen("\n"));
 184                 strbuf_add_commented_lines(&buf, _(note_template), strlen(_(note_template)));
 185                 strbuf_addch(&buf, '\n');
 186                 write_or_die(fd, buf.buf, buf.len);
 187
 188                 write_commented_object(fd, object);
 189
 190                 close(fd);
 191                 strbuf_release(&buf);
 192                 strbuf_reset(&d->buf);
 193
 194                 if (launch_editor(d->edit_path, &d->buf, NULL)) {
 195                         die(_("please supply the note contents using either -m or -F option"));
 196                 }
 197                 strbuf_stripspace(&d->buf, 1);
 198         }
 199 }
 200
 201 static void write_note_data(struct note_data *d, unsigned char *sha1)
 202 {
 203         if (write_sha1_file(d->buf.buf, d->buf.len, blob_type, sha1)) {
 204                 error(_("unable to write note object"));
 205                 if (d->edit_path)
 206                         error(_("the note contents have been left in %s"),
 207                                 d->edit_path);
 208                 exit(128);
 209         }
 210 }
 211
 212 static int parse_msg_arg(const struct option *opt, const char *arg, int unset)
 213 {
 214         struct note_data *d = opt->value;
 215
 216         strbuf_grow(&d->buf, strlen(arg) + 2);
 217         if (d->buf.len)
 218                 strbuf_addch(&d->buf, '\n');
 219         strbuf_addstr(&d->buf, arg);
 220         strbuf_stripspace(&d->buf, 0);
 221
 222         d->given = 1;
 223         return 0;
 224 }
 225
 226 static int parse_file_arg(const struct option *opt, const char *arg, int unset)
 227 {
 228         struct note_data *d = opt->value;
 229
 230         if (d->buf.len)
 231                 strbuf_addch(&d->buf, '\n');
 232         if (!strcmp(arg, "-")) {
 233                 if (strbuf_read(&d->buf, 0, 1024) < 0)
 234                         die_errno(_("cannot read '%s'"), arg);
 235         } else if (strbuf_read_file(&d->buf, arg, 1024) < 0)
 236                 die_errno(_("could not open or read '%s'"), arg);
 237         strbuf_stripspace(&d->buf, 0);
 238
 239         d->given = 1;
 240         return 0;
 241 }
 242
 243 static int parse_reuse_arg(const struct option *opt, const char *arg, int unset)
 244 {
 245         struct note_data *d = opt->value;
 246         char *buf;
 247         struct object_id object;
 248         enum object_type type;
 249         unsigned long len;
 250
 251         if (d->buf.len)
 252                 strbuf_addch(&d->buf, '\n');
 253
 254         if (get_oid(arg, &object))
 255                 die(_("failed to resolve '%s' as a valid ref."), arg);
 256         if (!(buf = read_sha1_file(object.hash, &type, &len))) {
 257                 free(buf);
 258                 die(_("failed to read object '%s'."), arg);
 259         }
 260         if (type != OBJ_BLOB) {
 261                 free(buf);
 262                 die(_("cannot read note data from non-blob object '%s'."), arg);
 263         }
 264         strbuf_add(&d->buf, buf, len);
 265         free(buf);
 266
 267         d->given = 1;
 268         return 0;
 269 }
 270
 271 static int parse_reedit_arg(const struct option *opt, const char *arg, int unset)
 272 {
 273         struct note_data *d = opt->value;
 274         d->use_editor = 1;
 275         return parse_reuse_arg(opt, arg, unset);
 276 }
 277
 278 static int notes_copy_from_stdin(int force, const char *rewrite_cmd)
 279 {
 280         struct strbuf buf = STRBUF_INIT;
 281         struct notes_rewrite_cfg *c = NULL;
 282         struct notes_tree *t = NULL;
 283         int ret = 0;
 284         const char *msg = "Notes added by 'git notes copy'";
 285
 286         if (rewrite_cmd) {
 287                 c = init_copy_notes_for_rewrite(rewrite_cmd);
 288                 if (!c)
 289                         return 0;
 290         } else {
 291                 init_notes(NULL, NULL, NULL, NOTES_INIT_WRITABLE);
 292                 t = &default_notes_tree;
 293         }
 294
 295         while (strbuf_getline_lf(&buf, stdin) != EOF) {
 296                 struct object_id from_obj, to_obj;
 297                 struct strbuf **split;
 298                 int err;
 299
 300                 split = strbuf_split(&buf, ' ');
 301                 if (!split[0] || !split[1])
 302                         die(_("malformed input line: '%s'."), buf.buf);
 303                 strbuf_rtrim(split[0]);
 304                 strbuf_rtrim(split[1]);
 305                 if (get_oid(split[0]->buf, &from_obj))
 306                         die(_("failed to resolve '%s' as a valid ref."), split[0]->buf);
 307                 if (get_oid(split[1]->buf, &to_obj))
 308                         die(_("failed to resolve '%s' as a valid ref."), split[1]->buf);
 309
 310                 if (rewrite_cmd)
 311                         err = copy_note_for_rewrite(c, &from_obj, &to_obj);
 312                 else
 313                         err = copy_note(t, &from_obj, &to_obj, force,
 314                                         combine_notes_overwrite);
 315
 316                 if (err) {
 317                         error(_("failed to copy notes from '%s' to '%s'"),
 318                               split[0]->buf, split[1]->buf);
 319                         ret = 1;
 320                 }
 321
 322                 strbuf_list_free(split);
 323         }
 324
 325         if (!rewrite_cmd) {
 326                 commit_notes(t, msg);
 327                 free_notes(t);
 328         } else {
 329                 finish_copy_notes_for_rewrite(c, msg);
 330         }
 331         return ret;
 332 }
 333
 334 static struct notes_tree *init_notes_check(const char *subcommand,
 335                                            int flags)
 336 {
 337         struct notes_tree *t;
 338         const char *ref;
 339         init_notes(NULL, NULL, NULL, flags);
 340         t = &default_notes_tree;
 341
 342         ref = (flags & NOTES_INIT_WRITABLE) ? t->update_ref : t->ref;
 343         if (!starts_with(ref, "refs/notes/"))
 344                 /*
 345                  * TRANSLATORS: the first %s will be replaced by a git
 346                  * notes command: 'add', 'merge', 'remove', etc.
 347                  */
 348                 die(_("refusing to %s notes in %s (outside of refs/notes/)"),
 349                     subcommand, ref);
 350         return t;
 351 }
 352
 353 static int list(int argc, const char **argv, const char *prefix)
 354 {
 355         struct notes_tree *t;
 356         struct object_id object;
 357         const struct object_id *note;
 358         int retval = -1;
 359         struct option options[] = {
 360                 OPT_END()
 361         };
 362
 363         if (argc)
 364                 argc = parse_options(argc, argv, prefix, options,
 365                                      git_notes_list_usage, 0);
 366
 367         if (1 < argc) {
 368                 error(_("too many parameters"));
 369                 usage_with_options(git_notes_list_usage, options);
 370         }
 371
 372         t = init_notes_check("list", 0);
 373         if (argc) {
 374                 if (get_oid(argv[0], &object))
 375                         die(_("failed to resolve '%s' as a valid ref."), argv[0]);
 376                 note = get_note(t, &object);
 377                 if (note) {
 378                         puts(oid_to_hex(note));
 379                         retval = 0;
 380                 } else
 381                         retval = error(_("no note found for object %s."),
 382                                        oid_to_hex(&object));
 383         } else
 384                 retval = for_each_note(t, 0, list_each_note, NULL);
 385
 386         free_notes(t);
 387         return retval;
 388 }
 389
 390 static int append_edit(int argc, const char **argv, const char *prefix);
 391
 392 static int add(int argc, const char **argv, const char *prefix)
 393 {
 394         int force = 0, allow_empty = 0;
 395         const char *object_ref;
 396         struct notes_tree *t;
 397         struct object_id object, new_note;
 398         const struct object_id *note;
 399         struct note_data d = { 0, 0, NULL, STRBUF_INIT };
 400         struct option options[] = {
 401                 { OPTION_CALLBACK, 'm', "message", &d, N_("message"),
 402                         N_("note contents as a string"), PARSE_OPT_NONEG,
 403                         parse_msg_arg},
 404                 { OPTION_CALLBACK, 'F', "file", &d, N_("file"),
 405                         N_("note contents in a file"), PARSE_OPT_NONEG,
 406                         parse_file_arg},
 407                 { OPTION_CALLBACK, 'c', "reedit-message", &d, N_("object"),
 408                         N_("reuse and edit specified note object"), PARSE_OPT_NONEG,
 409                         parse_reedit_arg},
 410                 { OPTION_CALLBACK, 'C', "reuse-message", &d, N_("object"),
 411                         N_("reuse specified note object"), PARSE_OPT_NONEG,
 412                         parse_reuse_arg},
 413                 OPT_BOOL(0, "allow-empty", &allow_empty,
 414                         N_("allow storing empty note")),
 415                 OPT__FORCE(&force, N_("replace existing notes")),
 416                 OPT_END()
 417         };
 418
 419         argc = parse_options(argc, argv, prefix, options, git_notes_add_usage,
 420                              PARSE_OPT_KEEP_ARGV0);
 421
 422         if (2 < argc) {
 423                 error(_("too many parameters"));
 424                 usage_with_options(git_notes_add_usage, options);
 425         }
 426
 427         object_ref = argc > 1 ? argv[1] : "HEAD";
 428
 429         if (get_oid(object_ref, &object))
 430                 die(_("failed to resolve '%s' as a valid ref."), object_ref);
 431
 432         t = init_notes_check("add", NOTES_INIT_WRITABLE);
 433         note = get_note(t, &object);
 434
 435         if (note) {
 436                 if (!force) {
 437                         free_notes(t);
 438                         if (d.given) {
 439                                 free_note_data(&d);
 440                                 return error(_("Cannot add notes. "
 441                                         "Found existing notes for object %s. "
 442                                         "Use '-f' to overwrite existing notes"),
 443                                         oid_to_hex(&object));
 444                         }
 445                         /*
 446                          * Redirect to "edit" subcommand.
 447                          *
 448                          * We only end up here if none of -m/-F/-c/-C or -f are
 449                          * given. The original args are therefore still in
 450                          * argv[0-1].
 451                          */
 452                         argv[0] = "edit";
 453                         return append_edit(argc, argv, prefix);
 454                 }
 455                 fprintf(stderr, _("Overwriting existing notes for object %s\n"),
 456                         oid_to_hex(&object));
 457         }
 458
 459         prepare_note_data(&object, &d, note->hash);
 460         if (d.buf.len || allow_empty) {
 461                 write_note_data(&d, new_note.hash);
 462                 if (add_note(t, &object, &new_note, combine_notes_overwrite))
 463                         die("BUG: combine_notes_overwrite failed");
 464                 commit_notes(t, "Notes added by 'git notes add'");
 465         } else {
 466                 fprintf(stderr, _("Removing note for object %s\n"),
 467                         oid_to_hex(&object));
 468                 remove_note(t, object.hash);
 469                 commit_notes(t, "Notes removed by 'git notes add'");
 470         }
 471
 472         free_note_data(&d);
 473         free_notes(t);
 474         return 0;
 475 }
 476
 477 static int copy(int argc, const char **argv, const char *prefix)
 478 {
 479         int retval = 0, force = 0, from_stdin = 0;
 480         const struct object_id *from_note, *note;
 481         const char *object_ref;
 482         struct object_id object, from_obj;
 483         struct notes_tree *t;
 484         const char *rewrite_cmd = NULL;
 485         struct option options[] = {
 486                 OPT__FORCE(&force, N_("replace existing notes")),
 487                 OPT_BOOL(0, "stdin", &from_stdin, N_("read objects from stdin")),
 488                 OPT_STRING(0, "for-rewrite", &rewrite_cmd, N_("command"),
 489                            N_("load rewriting config for <command> (implies "
 490                               "--stdin)")),
 491                 OPT_END()
 492         };
 493
 494         argc = parse_options(argc, argv, prefix, options, git_notes_copy_usage,
 495                              0);
 496
 497         if (from_stdin || rewrite_cmd) {
 498                 if (argc) {
 499                         error(_("too many parameters"));
 500                         usage_with_options(git_notes_copy_usage, options);
 501                 } else {
 502                         return notes_copy_from_stdin(force, rewrite_cmd);
 503                 }
 504         }
 505
 506         if (argc < 2) {
 507                 error(_("too few parameters"));
 508                 usage_with_options(git_notes_copy_usage, options);
 509         }
 510         if (2 < argc) {
 511                 error(_("too many parameters"));
 512                 usage_with_options(git_notes_copy_usage, options);
 513         }
 514
 515         if (get_oid(argv[0], &from_obj))
 516                 die(_("failed to resolve '%s' as a valid ref."), argv[0]);
 517
 518         object_ref = 1 < argc ? argv[1] : "HEAD";
 519
 520         if (get_oid(object_ref, &object))
 521                 die(_("failed to resolve '%s' as a valid ref."), object_ref);
 522
 523         t = init_notes_check("copy", NOTES_INIT_WRITABLE);
 524         note = get_note(t, &object);
 525
 526         if (note) {
 527                 if (!force) {
 528                         retval = error(_("Cannot copy notes. Found existing "
 529                                        "notes for object %s. Use '-f' to "
 530                                        "overwrite existing notes"),
 531                                        oid_to_hex(&object));
 532                         goto out;
 533                 }
 534                 fprintf(stderr, _("Overwriting existing notes for object %s\n"),
 535                         oid_to_hex(&object));
 536         }
 537
 538         from_note = get_note(t, &from_obj);
 539         if (!from_note) {
 540                 retval = error(_("missing notes on source object %s. Cannot "
 541                                "copy."), oid_to_hex(&from_obj));
 542                 goto out;
 543         }
 544
 545         if (add_note(t, &object, from_note, combine_notes_overwrite))
 546                 die("BUG: combine_notes_overwrite failed");
 547         commit_notes(t, "Notes added by 'git notes copy'");
 548 out:
 549         free_notes(t);
 550         return retval;
 551 }
 552
 553 static int append_edit(int argc, const char **argv, const char *prefix)
 554 {
 555         int allow_empty = 0;
 556         const char *object_ref;
 557         struct notes_tree *t;
 558         struct object_id object, new_note;
 559         const struct object_id *note;
 560         char *logmsg;
 561         const char * const *usage;
 562         struct note_data d = { 0, 0, NULL, STRBUF_INIT };
 563         struct option options[] = {
 564                 { OPTION_CALLBACK, 'm', "message", &d, N_("message"),
 565                         N_("note contents as a string"), PARSE_OPT_NONEG,
 566                         parse_msg_arg},
 567                 { OPTION_CALLBACK, 'F', "file", &d, N_("file"),
 568                         N_("note contents in a file"), PARSE_OPT_NONEG,
 569                         parse_file_arg},
 570                 { OPTION_CALLBACK, 'c', "reedit-message", &d, N_("object"),
 571                         N_("reuse and edit specified note object"), PARSE_OPT_NONEG,
 572                         parse_reedit_arg},
 573                 { OPTION_CALLBACK, 'C', "reuse-message", &d, N_("object"),
 574                         N_("reuse specified note object"), PARSE_OPT_NONEG,
 575                         parse_reuse_arg},
 576                 OPT_BOOL(0, "allow-empty", &allow_empty,
 577                         N_("allow storing empty note")),
 578                 OPT_END()
 579         };
 580         int edit = !strcmp(argv[0], "edit");
 581
 582         usage = edit ? git_notes_edit_usage : git_notes_append_usage;
 583         argc = parse_options(argc, argv, prefix, options, usage,
 584                              PARSE_OPT_KEEP_ARGV0);
 585
 586         if (2 < argc) {
 587                 error(_("too many parameters"));
 588                 usage_with_options(usage, options);
 589         }
 590
 591         if (d.given && edit)
 592                 fprintf(stderr, _("The -m/-F/-c/-C options have been deprecated "
 593                         "for the 'edit' subcommand.\n"
 594                         "Please use 'git notes add -f -m/-F/-c/-C' instead.\n"));
 595
 596         object_ref = 1 < argc ? argv[1] : "HEAD";
 597
 598         if (get_oid(object_ref, &object))
 599                 die(_("failed to resolve '%s' as a valid ref."), object_ref);
 600
 601         t = init_notes_check(argv[0], NOTES_INIT_WRITABLE);
 602         note = get_note(t, &object);
 603
 604         prepare_note_data(&object, &d, edit && note ? note->hash : NULL);
 605
 606         if (note && !edit) {
 607                 /* Append buf to previous note contents */
 608                 unsigned long size;
 609                 enum object_type type;
 610                 char *prev_buf = read_sha1_file(note->hash, &type, &size);
 611
 612                 strbuf_grow(&d.buf, size + 1);
 613                 if (d.buf.len && prev_buf && size)
 614                         strbuf_insert(&d.buf, 0, "\n", 1);
 615                 if (prev_buf && size)
 616                         strbuf_insert(&d.buf, 0, prev_buf, size);
 617                 free(prev_buf);
 618         }
 619
 620         if (d.buf.len || allow_empty) {
 621                 write_note_data(&d, new_note.hash);
 622                 if (add_note(t, &object, &new_note, combine_notes_overwrite))
 623                         die("BUG: combine_notes_overwrite failed");
 624                 logmsg = xstrfmt("Notes added by 'git notes %s'", argv[0]);
 625         } else {
 626                 fprintf(stderr, _("Removing note for object %s\n"),
 627                         oid_to_hex(&object));
 628                 remove_note(t, object.hash);
 629                 logmsg = xstrfmt("Notes removed by 'git notes %s'", argv[0]);
 630         }
 631         commit_notes(t, logmsg);
 632
 633         free(logmsg);
 634         free_note_data(&d);
 635         free_notes(t);
 636         return 0;
 637 }
 638
 639 static int show(int argc, const char **argv, const char *prefix)
 640 {
 641         const char *object_ref;
 642         struct notes_tree *t;
 643         struct object_id object;
 644         const struct object_id *note;
 645         int retval;
 646         struct option options[] = {
 647                 OPT_END()
 648         };
 649
 650         argc = parse_options(argc, argv, prefix, options, git_notes_show_usage,
 651                              0);
 652
 653         if (1 < argc) {
 654                 error(_("too many parameters"));
 655                 usage_with_options(git_notes_show_usage, options);
 656         }
 657
 658         object_ref = argc ? argv[0] : "HEAD";
 659
 660         if (get_oid(object_ref, &object))
 661                 die(_("failed to resolve '%s' as a valid ref."), object_ref);
 662
 663         t = init_notes_check("show", 0);
 664         note = get_note(t, &object);
 665
 666         if (!note)
 667                 retval = error(_("no note found for object %s."),
 668                                oid_to_hex(&object));
 669         else {
 670                 const char *show_args[3] = {"show", oid_to_hex(note), NULL};
 671                 retval = execv_git_cmd(show_args);
 672         }
 673         free_notes(t);
 674         return retval;
 675 }
 676
 677 static int merge_abort(struct notes_merge_options *o)
 678 {
 679         int ret = 0;
 680
 681         /*
 682          * Remove .git/NOTES_MERGE_PARTIAL and .git/NOTES_MERGE_REF, and call
 683          * notes_merge_abort() to remove .git/NOTES_MERGE_WORKTREE.
 684          */
 685
 686         if (delete_ref(NULL, "NOTES_MERGE_PARTIAL", NULL, 0))
 687                 ret += error(_("failed to delete ref NOTES_MERGE_PARTIAL"));
 688         if (delete_ref(NULL, "NOTES_MERGE_REF", NULL, REF_NODEREF))
 689                 ret += error(_("failed to delete ref NOTES_MERGE_REF"));
 690         if (notes_merge_abort(o))
 691                 ret += error(_("failed to remove 'git notes merge' worktree"));
 692         return ret;
 693 }
 694
 695 static int merge_commit(struct notes_merge_options *o)
 696 {
 697         struct strbuf msg = STRBUF_INIT;
 698         struct object_id oid, parent_oid;
 699         struct notes_tree *t;
 700         struct commit *partial;
 701         struct pretty_print_context pretty_ctx;
 702         void *local_ref_to_free;
 703         int ret;
 704
 705         /*
 706          * Read partial merge result from .git/NOTES_MERGE_PARTIAL,
 707          * and target notes ref from .git/NOTES_MERGE_REF.
 708          */
 709
 710         if (get_oid("NOTES_MERGE_PARTIAL", &oid))
 711                 die(_("failed to read ref NOTES_MERGE_PARTIAL"));
 712         else if (!(partial = lookup_commit_reference(&oid)))
 713                 die(_("could not find commit from NOTES_MERGE_PARTIAL."));
 714         else if (parse_commit(partial))
 715                 die(_("could not parse commit from NOTES_MERGE_PARTIAL."));
 716
 717         if (partial->parents)
 718                 oidcpy(&parent_oid, &partial->parents->item->object.oid);
 719         else
 720                 oidclr(&parent_oid);
 721
 722         t = xcalloc(1, sizeof(struct notes_tree));
 723         init_notes(t, "NOTES_MERGE_PARTIAL", combine_notes_overwrite, 0);
 724
 725         o->local_ref = local_ref_to_free =
 726                 resolve_refdup("NOTES_MERGE_REF", 0, oid.hash, NULL);
 727         if (!o->local_ref)
 728                 die(_("failed to resolve NOTES_MERGE_REF"));
 729
 730         if (notes_merge_commit(o, t, partial, &oid))
 731                 die(_("failed to finalize notes merge"));
 732
 733         /* Reuse existing commit message in reflog message */
 734         memset(&pretty_ctx, 0, sizeof(pretty_ctx));
 735         format_commit_message(partial, "%s", &msg, &pretty_ctx);
 736         strbuf_trim(&msg);
 737         strbuf_insert(&msg, 0, "notes: ", 7);
 738         update_ref(msg.buf, o->local_ref, oid.hash,
 739                    is_null_oid(&parent_oid) ? NULL : parent_oid.hash,
 740                    0, UPDATE_REFS_DIE_ON_ERR);
 741
 742         free_notes(t);
 743         strbuf_release(&msg);
 744         ret = merge_abort(o);
 745         free(local_ref_to_free);
 746         return ret;
 747 }
 748
 749 static int git_config_get_notes_strategy(const char *key,
 750                                          enum notes_merge_strategy *strategy)
 751 {
 752         char *value;
 753
 754         if (git_config_get_string(key, &value))
 755                 return 1;
 756         if (parse_notes_merge_strategy(value, strategy))
 757                 git_die_config(key, _("unknown notes merge strategy %s"), value);
 758
 759         free(value);
 760         return 0;
 761 }
 762
 763 static int merge(int argc, const char **argv, const char *prefix)
 764 {
 765         struct strbuf remote_ref = STRBUF_INIT, msg = STRBUF_INIT;
 766         struct object_id result_oid;
 767         struct notes_tree *t;
 768         struct notes_merge_options o;
 769         int do_merge = 0, do_commit = 0, do_abort = 0;
 770         int verbosity = 0, result;
 771         const char *strategy = NULL;
 772         struct option options[] = {
 773                 OPT_GROUP(N_("General options")),
 774                 OPT__VERBOSITY(&verbosity),
 775                 OPT_GROUP(N_("Merge options")),
 776                 OPT_STRING('s', "strategy", &strategy, N_("strategy"),
 777                            N_("resolve notes conflicts using the given strategy "
 778                               "(manual/ours/theirs/union/cat_sort_uniq)")),
 779                 OPT_GROUP(N_("Committing unmerged notes")),
 780                 { OPTION_SET_INT, 0, "commit", &do_commit, NULL,
 781                         N_("finalize notes merge by committing unmerged notes"),
 782                         PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL, 1},
 783                 OPT_GROUP(N_("Aborting notes merge resolution")),
 784                 { OPTION_SET_INT, 0, "abort", &do_abort, NULL,
 785                         N_("abort notes merge"),
 786                         PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL, 1},
 787                 OPT_END()
 788         };
 789
 790         argc = parse_options(argc, argv, prefix, options,
 791                              git_notes_merge_usage, 0);
 792
 793         if (strategy || do_commit + do_abort == 0)
 794                 do_merge = 1;
 795         if (do_merge + do_commit + do_abort != 1) {
 796                 error(_("cannot mix --commit, --abort or -s/--strategy"));
 797                 usage_with_options(git_notes_merge_usage, options);
 798         }
 799
 800         if (do_merge && argc != 1) {
 801                 error(_("must specify a notes ref to merge"));
 802                 usage_with_options(git_notes_merge_usage, options);
 803         } else if (!do_merge && argc) {
 804                 error(_("too many parameters"));
 805                 usage_with_options(git_notes_merge_usage, options);
 806         }
 807
 808         init_notes_merge_options(&o);
 809         o.verbosity = verbosity + NOTES_MERGE_VERBOSITY_DEFAULT;
 810
 811         if (do_abort)
 812                 return merge_abort(&o);
 813         if (do_commit)
 814                 return merge_commit(&o);
 815
 816         o.local_ref = default_notes_ref();
 817         strbuf_addstr(&remote_ref, argv[0]);
 818         expand_loose_notes_ref(&remote_ref);
 819         o.remote_ref = remote_ref.buf;
 820
 821         t = init_notes_check("merge", NOTES_INIT_WRITABLE);
 822
 823         if (strategy) {
 824                 if (parse_notes_merge_strategy(strategy, &o.strategy)) {
 825                         error(_("unknown -s/--strategy: %s"), strategy);
 826                         usage_with_options(git_notes_merge_usage, options);
 827                 }
 828         } else {
 829                 struct strbuf merge_key = STRBUF_INIT;
 830                 const char *short_ref = NULL;
 831
 832                 if (!skip_prefix(o.local_ref, "refs/notes/", &short_ref))
 833                         die("BUG: local ref %s is outside of refs/notes/",
 834                             o.local_ref);
 835
 836                 strbuf_addf(&merge_key, "notes.%s.mergeStrategy", short_ref);
 837
 838                 if (git_config_get_notes_strategy(merge_key.buf, &o.strategy))
 839                         git_config_get_notes_strategy("notes.mergeStrategy", &o.strategy);
 840
 841                 strbuf_release(&merge_key);
 842         }
 843
 844         strbuf_addf(&msg, "notes: Merged notes from %s into %s",
 845                     remote_ref.buf, default_notes_ref());
 846         strbuf_add(&(o.commit_msg), msg.buf + 7, msg.len - 7); /* skip "notes: " */
 847
 848         result = notes_merge(&o, t, &result_oid);
 849
 850         if (result >= 0) /* Merge resulted (trivially) in result_oid */
 851                 /* Update default notes ref with new commit */
 852                 update_ref(msg.buf, default_notes_ref(), result_oid.hash, NULL,
 853                            0, UPDATE_REFS_DIE_ON_ERR);
 854         else { /* Merge has unresolved conflicts */
 855                 const struct worktree *wt;
 856                 /* Update .git/NOTES_MERGE_PARTIAL with partial merge result */
 857                 update_ref(msg.buf, "NOTES_MERGE_PARTIAL", result_oid.hash, NULL,
 858                            0, UPDATE_REFS_DIE_ON_ERR);
 859                 /* Store ref-to-be-updated into .git/NOTES_MERGE_REF */
 860                 wt = find_shared_symref("NOTES_MERGE_REF", default_notes_ref());
 861                 if (wt)
 862                         die(_("a notes merge into %s is already in-progress at %s"),
 863                             default_notes_ref(), wt->path);
 864                 if (create_symref("NOTES_MERGE_REF", default_notes_ref(), NULL))
 865                         die(_("failed to store link to current notes ref (%s)"),
 866                             default_notes_ref());
 867                 printf(_("Automatic notes merge failed. Fix conflicts in %s and "
 868                          "commit the result with 'git notes merge --commit', or "
 869                          "abort the merge with 'git notes merge --abort'.\n"),
 870                        git_path(NOTES_MERGE_WORKTREE));
 871         }
 872
 873         free_notes(t);
 874         strbuf_release(&remote_ref);
 875         strbuf_release(&msg);
 876         return result < 0; /* return non-zero on conflicts */
 877 }
 878
 879 #define IGNORE_MISSING 1
 880
 881 static int remove_one_note(struct notes_tree *t, const char *name, unsigned flag)
 882 {
 883         int status;
 884         struct object_id oid;
 885         if (get_oid(name, &oid))
 886                 return error(_("Failed to resolve '%s' as a valid ref."), name);
 887         status = remove_note(t, oid.hash);
 888         if (status)
 889                 fprintf(stderr, _("Object %s has no note\n"), name);
 890         else
 891                 fprintf(stderr, _("Removing note for object %s\n"), name);
 892         return (flag & IGNORE_MISSING) ? 0 : status;
 893 }
 894
 895 static int remove_cmd(int argc, const char **argv, const char *prefix)
 896 {
 897         unsigned flag = 0;
 898         int from_stdin = 0;
 899         struct option options[] = {
 900                 OPT_BIT(0, "ignore-missing", &flag,
 901                         N_("attempt to remove non-existent note is not an error"),
 902                         IGNORE_MISSING),
 903                 OPT_BOOL(0, "stdin", &from_stdin,
 904                             N_("read object names from the standard input")),
 905                 OPT_END()
 906         };
 907         struct notes_tree *t;
 908         int retval = 0;
 909
 910         argc = parse_options(argc, argv, prefix, options,
 911                              git_notes_remove_usage, 0);
 912
 913         t = init_notes_check("remove", NOTES_INIT_WRITABLE);
 914
 915         if (!argc && !from_stdin) {
 916                 retval = remove_one_note(t, "HEAD", flag);
 917         } else {
 918                 while (*argv) {
 919                         retval |= remove_one_note(t, *argv, flag);
 920                         argv++;
 921                 }
 922         }
 923         if (from_stdin) {
 924                 struct strbuf sb = STRBUF_INIT;
 925                 while (strbuf_getwholeline(&sb, stdin, '\n') != EOF) {
 926                         strbuf_rtrim(&sb);
 927                         retval |= remove_one_note(t, sb.buf, flag);
 928                 }
 929                 strbuf_release(&sb);
 930         }
 931         if (!retval)
 932                 commit_notes(t, "Notes removed by 'git notes remove'");
 933         free_notes(t);
 934         return retval;
 935 }
 936
 937 static int prune(int argc, const char **argv, const char *prefix)
 938 {
 939         struct notes_tree *t;
 940         int show_only = 0, verbose = 0;
 941         struct option options[] = {
 942                 OPT__DRY_RUN(&show_only, N_("do not remove, show only")),
 943                 OPT__VERBOSE(&verbose, N_("report pruned notes")),
 944                 OPT_END()
 945         };
 946
 947         argc = parse_options(argc, argv, prefix, options, git_notes_prune_usage,
 948                              0);
 949
 950         if (argc) {
 951                 error(_("too many parameters"));
 952                 usage_with_options(git_notes_prune_usage, options);
 953         }
 954
 955         t = init_notes_check("prune", NOTES_INIT_WRITABLE);
 956
 957         prune_notes(t, (verbose ? NOTES_PRUNE_VERBOSE : 0) |
 958                 (show_only ? NOTES_PRUNE_VERBOSE|NOTES_PRUNE_DRYRUN : 0) );
 959         if (!show_only)
 960                 commit_notes(t, "Notes removed by 'git notes prune'");
 961         free_notes(t);
 962         return 0;
 963 }
 964
 965 static int get_ref(int argc, const char **argv, const char *prefix)
 966 {
 967         struct option options[] = { OPT_END() };
 968         argc = parse_options(argc, argv, prefix, options,
 969                              git_notes_get_ref_usage, 0);
 970
 971         if (argc) {
 972                 error(_("too many parameters"));
 973                 usage_with_options(git_notes_get_ref_usage, options);
 974         }
 975
 976         puts(default_notes_ref());
 977         return 0;
 978 }
 979
 980 int cmd_notes(int argc, const char **argv, const char *prefix)
 981 {
 982         int result;
 983         const char *override_notes_ref = NULL;
 984         struct option options[] = {
 985                 OPT_STRING(0, "ref", &override_notes_ref, N_("notes-ref"),
 986                            N_("use notes from <notes-ref>")),
 987                 OPT_END()
 988         };
 989
 990         git_config(git_default_config, NULL);
 991         argc = parse_options(argc, argv, prefix, options, git_notes_usage,
 992                              PARSE_OPT_STOP_AT_NON_OPTION);
 993
 994         if (override_notes_ref) {
 995                 struct strbuf sb = STRBUF_INIT;
 996                 strbuf_addstr(&sb, override_notes_ref);
 997                 expand_notes_ref(&sb);
 998                 setenv("GIT_NOTES_REF", sb.buf, 1);
 999                 strbuf_release(&sb);
1000         }
1001
1002         if (argc < 1 || !strcmp(argv[0], "list"))
1003                 result = list(argc, argv, prefix);
1004         else if (!strcmp(argv[0], "add"))
1005                 result = add(argc, argv, prefix);
1006         else if (!strcmp(argv[0], "copy"))
1007                 result = copy(argc, argv, prefix);
1008         else if (!strcmp(argv[0], "append") || !strcmp(argv[0], "edit"))
1009                 result = append_edit(argc, argv, prefix);
1010         else if (!strcmp(argv[0], "show"))
1011                 result = show(argc, argv, prefix);
1012         else if (!strcmp(argv[0], "merge"))
1013                 result = merge(argc, argv, prefix);
1014         else if (!strcmp(argv[0], "remove"))
1015                 result = remove_cmd(argc, argv, prefix);
1016         else if (!strcmp(argv[0], "prune"))
1017                 result = prune(argc, argv, prefix);
1018         else if (!strcmp(argv[0], "get-ref"))
1019                 result = get_ref(argc, argv, prefix);
1020         else {
1021                 result = error(_("unknown subcommand: %s"), argv[0]);
1022                 usage_with_options(git_notes_usage, options);
1023         }
1024
1025         return result ? 1 : 0;
1026 }