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 "object-store.h"
  15 #include "repository.h"
  16 #include "blob.h"
  17 #include "pretty.h"
  18 #include "refs.h"
  19 #include "exec-cmd.h"
  20 #include "run-command.h"
  21 #include "parse-options.h"
  22 #include "string-list.h"
  23 #include "notes-merge.h"
  24 #include "notes-utils.h"
  25 #include "worktree.h"
  26
  27 static const char * const git_notes_usage[] = {
  28         N_("git notes [--ref <notes-ref>] [list [<object>]]"),
  29         N_("git notes [--ref <notes-ref>] add [-f] [--allow-empty] [-m <msg> | -F <file> | (-c | -C) <object>] [<object>]"),
  30         N_("git notes [--ref <notes-ref>] copy [-f] <from-object> <to-object>"),
  31         N_("git notes [--ref <notes-ref>] append [--allow-empty] [-m <msg> | -F <file> | (-c | -C) <object>] [<object>]"),
  32         N_("git notes [--ref <notes-ref>] edit [--allow-empty] [<object>]"),
  33         N_("git notes [--ref <notes-ref>] show [<object>]"),
  34         N_("git notes [--ref <notes-ref>] merge [-v | -q] [-s <strategy>] <notes-ref>"),
  35         N_("git notes merge --commit [-v | -q]"),
  36         N_("git notes merge --abort [-v | -q]"),
  37         N_("git notes [--ref <notes-ref>] remove [<object>...]"),
  38         N_("git notes [--ref <notes-ref>] prune [-n] [-v]"),
  39         N_("git notes [--ref <notes-ref>] get-ref"),
  40         NULL
  41 };
  42
  43 static const char * const git_notes_list_usage[] = {
  44         N_("git notes [list [<object>]]"),
  45         NULL
  46 };
  47
  48 static const char * const git_notes_add_usage[] = {
  49         N_("git notes add [<options>] [<object>]"),
  50         NULL
  51 };
  52
  53 static const char * const git_notes_copy_usage[] = {
  54         N_("git notes copy [<options>] <from-object> <to-object>"),
  55         N_("git notes copy --stdin [<from-object> <to-object>]..."),
  56         NULL
  57 };
  58
  59 static const char * const git_notes_append_usage[] = {
  60         N_("git notes append [<options>] [<object>]"),
  61         NULL
  62 };
  63
  64 static const char * const git_notes_edit_usage[] = {
  65         N_("git notes edit [<object>]"),
  66         NULL
  67 };
  68
  69 static const char * const git_notes_show_usage[] = {
  70         N_("git notes show [<object>]"),
  71         NULL
  72 };
  73
  74 static const char * const git_notes_merge_usage[] = {
  75         N_("git notes merge [<options>] <notes-ref>"),
  76         N_("git notes merge --commit [<options>]"),
  77         N_("git notes merge --abort [<options>]"),
  78         NULL
  79 };
  80
  81 static const char * const git_notes_remove_usage[] = {
  82         N_("git notes remove [<object>]"),
  83         NULL
  84 };
  85
  86 static const char * const git_notes_prune_usage[] = {
  87         N_("git notes prune [<options>]"),
  88         NULL
  89 };
  90
  91 static const char * const git_notes_get_ref_usage[] = {
  92         N_("git notes get-ref"),
  93         NULL
  94 };
  95
  96 static const char note_template[] =
  97         N_("Write/edit the notes for the following object:");
  98
  99 struct note_data {
 100         int given;
 101         int use_editor;
 102         char *edit_path;
 103         struct strbuf buf;
 104 };
 105
 106 static void free_note_data(struct note_data *d)
 107 {
 108         if (d->edit_path) {
 109                 unlink_or_warn(d->edit_path);
 110                 free(d->edit_path);
 111         }
 112         strbuf_release(&d->buf);
 113 }
 114
 115 static int list_each_note(const struct object_id *object_oid,
 116                 const struct object_id *note_oid, char *note_path,
 117                 void *cb_data)
 118 {
 119         printf("%s %s\n", oid_to_hex(note_oid), oid_to_hex(object_oid));
 120         return 0;
 121 }
 122
 123 static void copy_obj_to_fd(int fd, const struct object_id *oid)
 124 {
 125         unsigned long size;
 126         enum object_type type;
 127         char *buf = read_object_file(oid, &type, &size);
 128         if (buf) {
 129                 if (size)
 130                         write_or_die(fd, buf, size);
 131                 free(buf);
 132         }
 133 }
 134
 135 static void write_commented_object(int fd, const struct object_id *object)
 136 {
 137         const char *show_args[5] =
 138                 {"show", "--stat", "--no-notes", oid_to_hex(object), NULL};
 139         struct child_process show = CHILD_PROCESS_INIT;
 140         struct strbuf buf = STRBUF_INIT;
 141         struct strbuf cbuf = STRBUF_INIT;
 142
 143         /* Invoke "git show --stat --no-notes $object" */
 144         show.argv = show_args;
 145         show.no_stdin = 1;
 146         show.out = -1;
 147         show.err = 0;
 148         show.git_cmd = 1;
 149         if (start_command(&show))
 150                 die(_("unable to start 'show' for object '%s'"),
 151                     oid_to_hex(object));
 152
 153         if (strbuf_read(&buf, show.out, 0) < 0)
 154                 die_errno(_("could not read 'show' output"));
 155         strbuf_add_commented_lines(&cbuf, buf.buf, buf.len);
 156         write_or_die(fd, cbuf.buf, cbuf.len);
 157
 158         strbuf_release(&cbuf);
 159         strbuf_release(&buf);
 160
 161         if (finish_command(&show))
 162                 die(_("failed to finish 'show' for object '%s'"),
 163                     oid_to_hex(object));
 164 }
 165
 166 static void prepare_note_data(const struct object_id *object, struct note_data *d,
 167                 const struct object_id *old_note)
 168 {
 169         if (d->use_editor || !d->given) {
 170                 int fd;
 171                 struct strbuf buf = STRBUF_INIT;
 172
 173                 /* write the template message before editing: */
 174                 d->edit_path = git_pathdup("NOTES_EDITMSG");
 175                 fd = open(d->edit_path, O_CREAT | O_TRUNC | O_WRONLY, 0600);
 176                 if (fd < 0)
 177                         die_errno(_("could not create file '%s'"), d->edit_path);
 178
 179                 if (d->given)
 180                         write_or_die(fd, d->buf.buf, d->buf.len);
 181                 else if (old_note)
 182                         copy_obj_to_fd(fd, old_note);
 183
 184                 strbuf_addch(&buf, '\n');
 185                 strbuf_add_commented_lines(&buf, "\n", strlen("\n"));
 186                 strbuf_add_commented_lines(&buf, _(note_template), strlen(_(note_template)));
 187                 strbuf_addch(&buf, '\n');
 188                 write_or_die(fd, buf.buf, buf.len);
 189
 190                 write_commented_object(fd, object);
 191
 192                 close(fd);
 193                 strbuf_release(&buf);
 194                 strbuf_reset(&d->buf);
 195
 196                 if (launch_editor(d->edit_path, &d->buf, NULL)) {
 197                         die(_("please supply the note contents using either -m or -F option"));
 198                 }
 199                 strbuf_stripspace(&d->buf, 1);
 200         }
 201 }
 202
 203 static void write_note_data(struct note_data *d, struct object_id *oid)
 204 {
 205         if (write_object_file(d->buf.buf, d->buf.len, blob_type, oid)) {
 206                 error(_("unable to write note object"));
 207                 if (d->edit_path)
 208                         error(_("the note contents have been left in %s"),
 209                                 d->edit_path);
 210                 exit(128);
 211         }
 212 }
 213
 214 static int parse_msg_arg(const struct option *opt, const char *arg, int unset)
 215 {
 216         struct note_data *d = opt->value;
 217
 218         BUG_ON_OPT_NEG(unset);
 219
 220         strbuf_grow(&d->buf, strlen(arg) + 2);
 221         if (d->buf.len)
 222                 strbuf_addch(&d->buf, '\n');
 223         strbuf_addstr(&d->buf, arg);
 224         strbuf_stripspace(&d->buf, 0);
 225
 226         d->given = 1;
 227         return 0;
 228 }
 229
 230 static int parse_file_arg(const struct option *opt, const char *arg, int unset)
 231 {
 232         struct note_data *d = opt->value;
 233
 234         BUG_ON_OPT_NEG(unset);
 235
 236         if (d->buf.len)
 237                 strbuf_addch(&d->buf, '\n');
 238         if (!strcmp(arg, "-")) {
 239                 if (strbuf_read(&d->buf, 0, 1024) < 0)
 240                         die_errno(_("cannot read '%s'"), arg);
 241         } else if (strbuf_read_file(&d->buf, arg, 1024) < 0)
 242                 die_errno(_("could not open or read '%s'"), arg);
 243         strbuf_stripspace(&d->buf, 0);
 244
 245         d->given = 1;
 246         return 0;
 247 }
 248
 249 static int parse_reuse_arg(const struct option *opt, const char *arg, int unset)
 250 {
 251         struct note_data *d = opt->value;
 252         char *buf;
 253         struct object_id object;
 254         enum object_type type;
 255         unsigned long len;
 256
 257         BUG_ON_OPT_NEG(unset);
 258
 259         if (d->buf.len)
 260                 strbuf_addch(&d->buf, '\n');
 261
 262         if (get_oid(arg, &object))
 263                 die(_("failed to resolve '%s' as a valid ref."), arg);
 264         if (!(buf = read_object_file(&object, &type, &len)))
 265                 die(_("failed to read object '%s'."), arg);
 266         if (type != OBJ_BLOB) {
 267                 free(buf);
 268                 die(_("cannot read note data from non-blob object '%s'."), arg);
 269         }
 270         strbuf_add(&d->buf, buf, len);
 271         free(buf);
 272
 273         d->given = 1;
 274         return 0;
 275 }
 276
 277 static int parse_reedit_arg(const struct option *opt, const char *arg, int unset)
 278 {
 279         struct note_data *d = opt->value;
 280         BUG_ON_OPT_NEG(unset);
 281         d->use_editor = 1;
 282         return parse_reuse_arg(opt, arg, unset);
 283 }
 284
 285 static int notes_copy_from_stdin(int force, const char *rewrite_cmd)
 286 {
 287         struct strbuf buf = STRBUF_INIT;
 288         struct notes_rewrite_cfg *c = NULL;
 289         struct notes_tree *t = NULL;
 290         int ret = 0;
 291         const char *msg = "Notes added by 'git notes copy'";
 292
 293         if (rewrite_cmd) {
 294                 c = init_copy_notes_for_rewrite(rewrite_cmd);
 295                 if (!c)
 296                         return 0;
 297         } else {
 298                 init_notes(NULL, NULL, NULL, NOTES_INIT_WRITABLE);
 299                 t = &default_notes_tree;
 300         }
 301
 302         while (strbuf_getline_lf(&buf, stdin) != EOF) {
 303                 struct object_id from_obj, to_obj;
 304                 struct strbuf **split;
 305                 int err;
 306
 307                 split = strbuf_split(&buf, ' ');
 308                 if (!split[0] || !split[1])
 309                         die(_("malformed input line: '%s'."), buf.buf);
 310                 strbuf_rtrim(split[0]);
 311                 strbuf_rtrim(split[1]);
 312                 if (get_oid(split[0]->buf, &from_obj))
 313                         die(_("failed to resolve '%s' as a valid ref."), split[0]->buf);
 314                 if (get_oid(split[1]->buf, &to_obj))
 315                         die(_("failed to resolve '%s' as a valid ref."), split[1]->buf);
 316
 317                 if (rewrite_cmd)
 318                         err = copy_note_for_rewrite(c, &from_obj, &to_obj);
 319                 else
 320                         err = copy_note(t, &from_obj, &to_obj, force,
 321                                         combine_notes_overwrite);
 322
 323                 if (err) {
 324                         error(_("failed to copy notes from '%s' to '%s'"),
 325                               split[0]->buf, split[1]->buf);
 326                         ret = 1;
 327                 }
 328
 329                 strbuf_list_free(split);
 330         }
 331
 332         if (!rewrite_cmd) {
 333                 commit_notes(t, msg);
 334                 free_notes(t);
 335         } else {
 336                 finish_copy_notes_for_rewrite(c, msg);
 337         }
 338         strbuf_release(&buf);
 339         return ret;
 340 }
 341
 342 static struct notes_tree *init_notes_check(const char *subcommand,
 343                                            int flags)
 344 {
 345         struct notes_tree *t;
 346         const char *ref;
 347         init_notes(NULL, NULL, NULL, flags);
 348         t = &default_notes_tree;
 349
 350         ref = (flags & NOTES_INIT_WRITABLE) ? t->update_ref : t->ref;
 351         if (!starts_with(ref, "refs/notes/"))
 352                 /*
 353                  * TRANSLATORS: the first %s will be replaced by a git
 354                  * notes command: 'add', 'merge', 'remove', etc.
 355                  */
 356                 die(_("refusing to %s notes in %s (outside of refs/notes/)"),
 357                     subcommand, ref);
 358         return t;
 359 }
 360
 361 static int list(int argc, const char **argv, const char *prefix)
 362 {
 363         struct notes_tree *t;
 364         struct object_id object;
 365         const struct object_id *note;
 366         int retval = -1;
 367         struct option options[] = {
 368                 OPT_END()
 369         };
 370
 371         if (argc)
 372                 argc = parse_options(argc, argv, prefix, options,
 373                                      git_notes_list_usage, 0);
 374
 375         if (1 < argc) {
 376                 error(_("too many parameters"));
 377                 usage_with_options(git_notes_list_usage, options);
 378         }
 379
 380         t = init_notes_check("list", 0);
 381         if (argc) {
 382                 if (get_oid(argv[0], &object))
 383                         die(_("failed to resolve '%s' as a valid ref."), argv[0]);
 384                 note = get_note(t, &object);
 385                 if (note) {
 386                         puts(oid_to_hex(note));
 387                         retval = 0;
 388                 } else
 389                         retval = error(_("no note found for object %s."),
 390                                        oid_to_hex(&object));
 391         } else
 392                 retval = for_each_note(t, 0, list_each_note, NULL);
 393
 394         free_notes(t);
 395         return retval;
 396 }
 397
 398 static int append_edit(int argc, const char **argv, const char *prefix);
 399
 400 static int add(int argc, const char **argv, const char *prefix)
 401 {
 402         int force = 0, allow_empty = 0;
 403         const char *object_ref;
 404         struct notes_tree *t;
 405         struct object_id object, new_note;
 406         const struct object_id *note;
 407         struct note_data d = { 0, 0, NULL, STRBUF_INIT };
 408         struct option options[] = {
 409                 { OPTION_CALLBACK, 'm', "message", &d, N_("message"),
 410                         N_("note contents as a string"), PARSE_OPT_NONEG,
 411                         parse_msg_arg},
 412                 { OPTION_CALLBACK, 'F', "file", &d, N_("file"),
 413                         N_("note contents in a file"), PARSE_OPT_NONEG,
 414                         parse_file_arg},
 415                 { OPTION_CALLBACK, 'c', "reedit-message", &d, N_("object"),
 416                         N_("reuse and edit specified note object"), PARSE_OPT_NONEG,
 417                         parse_reedit_arg},
 418                 { OPTION_CALLBACK, 'C', "reuse-message", &d, N_("object"),
 419                         N_("reuse specified note object"), PARSE_OPT_NONEG,
 420                         parse_reuse_arg},
 421                 OPT_BOOL(0, "allow-empty", &allow_empty,
 422                         N_("allow storing empty note")),
 423                 OPT__FORCE(&force, N_("replace existing notes"), PARSE_OPT_NOCOMPLETE),
 424                 OPT_END()
 425         };
 426
 427         argc = parse_options(argc, argv, prefix, options, git_notes_add_usage,
 428                              PARSE_OPT_KEEP_ARGV0);
 429
 430         if (2 < argc) {
 431                 error(_("too many parameters"));
 432                 usage_with_options(git_notes_add_usage, options);
 433         }
 434
 435         object_ref = argc > 1 ? argv[1] : "HEAD";
 436
 437         if (get_oid(object_ref, &object))
 438                 die(_("failed to resolve '%s' as a valid ref."), object_ref);
 439
 440         t = init_notes_check("add", NOTES_INIT_WRITABLE);
 441         note = get_note(t, &object);
 442
 443         if (note) {
 444                 if (!force) {
 445                         free_notes(t);
 446                         if (d.given) {
 447                                 free_note_data(&d);
 448                                 return error(_("Cannot add notes. "
 449                                         "Found existing notes for object %s. "
 450                                         "Use '-f' to overwrite existing notes"),
 451                                         oid_to_hex(&object));
 452                         }
 453                         /*
 454                          * Redirect to "edit" subcommand.
 455                          *
 456                          * We only end up here if none of -m/-F/-c/-C or -f are
 457                          * given. The original args are therefore still in
 458                          * argv[0-1].
 459                          */
 460                         argv[0] = "edit";
 461                         return append_edit(argc, argv, prefix);
 462                 }
 463                 fprintf(stderr, _("Overwriting existing notes for object %s\n"),
 464                         oid_to_hex(&object));
 465         }
 466
 467         prepare_note_data(&object, &d, note);
 468         if (d.buf.len || allow_empty) {
 469                 write_note_data(&d, &new_note);
 470                 if (add_note(t, &object, &new_note, combine_notes_overwrite))
 471                         BUG("combine_notes_overwrite failed");
 472                 commit_notes(t, "Notes added by 'git notes add'");
 473         } else {
 474                 fprintf(stderr, _("Removing note for object %s\n"),
 475                         oid_to_hex(&object));
 476                 remove_note(t, object.hash);
 477                 commit_notes(t, "Notes removed by 'git notes add'");
 478         }
 479
 480         free_note_data(&d);
 481         free_notes(t);
 482         return 0;
 483 }
 484
 485 static int copy(int argc, const char **argv, const char *prefix)
 486 {
 487         int retval = 0, force = 0, from_stdin = 0;
 488         const struct object_id *from_note, *note;
 489         const char *object_ref;
 490         struct object_id object, from_obj;
 491         struct notes_tree *t;
 492         const char *rewrite_cmd = NULL;
 493         struct option options[] = {
 494                 OPT__FORCE(&force, N_("replace existing notes"), PARSE_OPT_NOCOMPLETE),
 495                 OPT_BOOL(0, "stdin", &from_stdin, N_("read objects from stdin")),
 496                 OPT_STRING(0, "for-rewrite", &rewrite_cmd, N_("command"),
 497                            N_("load rewriting config for <command> (implies "
 498                               "--stdin)")),
 499                 OPT_END()
 500         };
 501
 502         argc = parse_options(argc, argv, prefix, options, git_notes_copy_usage,
 503                              0);
 504
 505         if (from_stdin || rewrite_cmd) {
 506                 if (argc) {
 507                         error(_("too many parameters"));
 508                         usage_with_options(git_notes_copy_usage, options);
 509                 } else {
 510                         return notes_copy_from_stdin(force, rewrite_cmd);
 511                 }
 512         }
 513
 514         if (argc < 2) {
 515                 error(_("too few parameters"));
 516                 usage_with_options(git_notes_copy_usage, options);
 517         }
 518         if (2 < argc) {
 519                 error(_("too many parameters"));
 520                 usage_with_options(git_notes_copy_usage, options);
 521         }
 522
 523         if (get_oid(argv[0], &from_obj))
 524                 die(_("failed to resolve '%s' as a valid ref."), argv[0]);
 525
 526         object_ref = 1 < argc ? argv[1] : "HEAD";
 527
 528         if (get_oid(object_ref, &object))
 529                 die(_("failed to resolve '%s' as a valid ref."), object_ref);
 530
 531         t = init_notes_check("copy", NOTES_INIT_WRITABLE);
 532         note = get_note(t, &object);
 533
 534         if (note) {
 535                 if (!force) {
 536                         retval = error(_("Cannot copy notes. Found existing "
 537                                        "notes for object %s. Use '-f' to "
 538                                        "overwrite existing notes"),
 539                                        oid_to_hex(&object));
 540                         goto out;
 541                 }
 542                 fprintf(stderr, _("Overwriting existing notes for object %s\n"),
 543                         oid_to_hex(&object));
 544         }
 545
 546         from_note = get_note(t, &from_obj);
 547         if (!from_note) {
 548                 retval = error(_("missing notes on source object %s. Cannot "
 549                                "copy."), oid_to_hex(&from_obj));
 550                 goto out;
 551         }
 552
 553         if (add_note(t, &object, from_note, combine_notes_overwrite))
 554                 BUG("combine_notes_overwrite failed");
 555         commit_notes(t, "Notes added by 'git notes copy'");
 556 out:
 557         free_notes(t);
 558         return retval;
 559 }
 560
 561 static int append_edit(int argc, const char **argv, const char *prefix)
 562 {
 563         int allow_empty = 0;
 564         const char *object_ref;
 565         struct notes_tree *t;
 566         struct object_id object, new_note;
 567         const struct object_id *note;
 568         char *logmsg;
 569         const char * const *usage;
 570         struct note_data d = { 0, 0, NULL, STRBUF_INIT };
 571         struct option options[] = {
 572                 { OPTION_CALLBACK, 'm', "message", &d, N_("message"),
 573                         N_("note contents as a string"), PARSE_OPT_NONEG,
 574                         parse_msg_arg},
 575                 { OPTION_CALLBACK, 'F', "file", &d, N_("file"),
 576                         N_("note contents in a file"), PARSE_OPT_NONEG,
 577                         parse_file_arg},
 578                 { OPTION_CALLBACK, 'c', "reedit-message", &d, N_("object"),
 579                         N_("reuse and edit specified note object"), PARSE_OPT_NONEG,
 580                         parse_reedit_arg},
 581                 { OPTION_CALLBACK, 'C', "reuse-message", &d, N_("object"),
 582                         N_("reuse specified note object"), PARSE_OPT_NONEG,
 583                         parse_reuse_arg},
 584                 OPT_BOOL(0, "allow-empty", &allow_empty,
 585                         N_("allow storing empty note")),
 586                 OPT_END()
 587         };
 588         int edit = !strcmp(argv[0], "edit");
 589
 590         usage = edit ? git_notes_edit_usage : git_notes_append_usage;
 591         argc = parse_options(argc, argv, prefix, options, usage,
 592                              PARSE_OPT_KEEP_ARGV0);
 593
 594         if (2 < argc) {
 595                 error(_("too many parameters"));
 596                 usage_with_options(usage, options);
 597         }
 598
 599         if (d.given && edit)
 600                 fprintf(stderr, _("The -m/-F/-c/-C options have been deprecated "
 601                         "for the 'edit' subcommand.\n"
 602                         "Please use 'git notes add -f -m/-F/-c/-C' instead.\n"));
 603
 604         object_ref = 1 < argc ? argv[1] : "HEAD";
 605
 606         if (get_oid(object_ref, &object))
 607                 die(_("failed to resolve '%s' as a valid ref."), object_ref);
 608
 609         t = init_notes_check(argv[0], NOTES_INIT_WRITABLE);
 610         note = get_note(t, &object);
 611
 612         prepare_note_data(&object, &d, edit && note ? note : NULL);
 613
 614         if (note && !edit) {
 615                 /* Append buf to previous note contents */
 616                 unsigned long size;
 617                 enum object_type type;
 618                 char *prev_buf = read_object_file(note, &type, &size);
 619
 620                 strbuf_grow(&d.buf, size + 1);
 621                 if (d.buf.len && prev_buf && size)
 622                         strbuf_insert(&d.buf, 0, "\n", 1);
 623                 if (prev_buf && size)
 624                         strbuf_insert(&d.buf, 0, prev_buf, size);
 625                 free(prev_buf);
 626         }
 627
 628         if (d.buf.len || allow_empty) {
 629                 write_note_data(&d, &new_note);
 630                 if (add_note(t, &object, &new_note, combine_notes_overwrite))
 631                         BUG("combine_notes_overwrite failed");
 632                 logmsg = xstrfmt("Notes added by 'git notes %s'", argv[0]);
 633         } else {
 634                 fprintf(stderr, _("Removing note for object %s\n"),
 635                         oid_to_hex(&object));
 636                 remove_note(t, object.hash);
 637                 logmsg = xstrfmt("Notes removed by 'git notes %s'", argv[0]);
 638         }
 639         commit_notes(t, logmsg);
 640
 641         free(logmsg);
 642         free_note_data(&d);
 643         free_notes(t);
 644         return 0;
 645 }
 646
 647 static int show(int argc, const char **argv, const char *prefix)
 648 {
 649         const char *object_ref;
 650         struct notes_tree *t;
 651         struct object_id object;
 652         const struct object_id *note;
 653         int retval;
 654         struct option options[] = {
 655                 OPT_END()
 656         };
 657
 658         argc = parse_options(argc, argv, prefix, options, git_notes_show_usage,
 659                              0);
 660
 661         if (1 < argc) {
 662                 error(_("too many parameters"));
 663                 usage_with_options(git_notes_show_usage, options);
 664         }
 665
 666         object_ref = argc ? argv[0] : "HEAD";
 667
 668         if (get_oid(object_ref, &object))
 669                 die(_("failed to resolve '%s' as a valid ref."), object_ref);
 670
 671         t = init_notes_check("show", 0);
 672         note = get_note(t, &object);
 673
 674         if (!note)
 675                 retval = error(_("no note found for object %s."),
 676                                oid_to_hex(&object));
 677         else {
 678                 const char *show_args[3] = {"show", oid_to_hex(note), NULL};
 679                 retval = execv_git_cmd(show_args);
 680         }
 681         free_notes(t);
 682         return retval;
 683 }
 684
 685 static int merge_abort(struct notes_merge_options *o)
 686 {
 687         int ret = 0;
 688
 689         /*
 690          * Remove .git/NOTES_MERGE_PARTIAL and .git/NOTES_MERGE_REF, and call
 691          * notes_merge_abort() to remove .git/NOTES_MERGE_WORKTREE.
 692          */
 693
 694         if (delete_ref(NULL, "NOTES_MERGE_PARTIAL", NULL, 0))
 695                 ret += error(_("failed to delete ref NOTES_MERGE_PARTIAL"));
 696         if (delete_ref(NULL, "NOTES_MERGE_REF", NULL, REF_NO_DEREF))
 697                 ret += error(_("failed to delete ref NOTES_MERGE_REF"));
 698         if (notes_merge_abort(o))
 699                 ret += error(_("failed to remove 'git notes merge' worktree"));
 700         return ret;
 701 }
 702
 703 static int merge_commit(struct notes_merge_options *o)
 704 {
 705         struct strbuf msg = STRBUF_INIT;
 706         struct object_id oid, parent_oid;
 707         struct notes_tree *t;
 708         struct commit *partial;
 709         struct pretty_print_context pretty_ctx;
 710         void *local_ref_to_free;
 711         int ret;
 712
 713         /*
 714          * Read partial merge result from .git/NOTES_MERGE_PARTIAL,
 715          * and target notes ref from .git/NOTES_MERGE_REF.
 716          */
 717
 718         if (get_oid("NOTES_MERGE_PARTIAL", &oid))
 719                 die(_("failed to read ref NOTES_MERGE_PARTIAL"));
 720         else if (!(partial = lookup_commit_reference(the_repository, &oid)))
 721                 die(_("could not find commit from NOTES_MERGE_PARTIAL."));
 722         else if (parse_commit(partial))
 723                 die(_("could not parse commit from NOTES_MERGE_PARTIAL."));
 724
 725         if (partial->parents)
 726                 oidcpy(&parent_oid, &partial->parents->item->object.oid);
 727         else
 728                 oidclr(&parent_oid);
 729
 730         t = xcalloc(1, sizeof(struct notes_tree));
 731         init_notes(t, "NOTES_MERGE_PARTIAL", combine_notes_overwrite, 0);
 732
 733         o->local_ref = local_ref_to_free =
 734                 resolve_refdup("NOTES_MERGE_REF", 0, &oid, NULL);
 735         if (!o->local_ref)
 736                 die(_("failed to resolve NOTES_MERGE_REF"));
 737
 738         if (notes_merge_commit(o, t, partial, &oid))
 739                 die(_("failed to finalize notes merge"));
 740
 741         /* Reuse existing commit message in reflog message */
 742         memset(&pretty_ctx, 0, sizeof(pretty_ctx));
 743         format_commit_message(partial, "%s", &msg, &pretty_ctx);
 744         strbuf_trim(&msg);
 745         strbuf_insert(&msg, 0, "notes: ", 7);
 746         update_ref(msg.buf, o->local_ref, &oid,
 747                    is_null_oid(&parent_oid) ? NULL : &parent_oid,
 748                    0, UPDATE_REFS_DIE_ON_ERR);
 749
 750         free_notes(t);
 751         strbuf_release(&msg);
 752         ret = merge_abort(o);
 753         free(local_ref_to_free);
 754         return ret;
 755 }
 756
 757 static int git_config_get_notes_strategy(const char *key,
 758                                          enum notes_merge_strategy *strategy)
 759 {
 760         char *value;
 761
 762         if (git_config_get_string(key, &value))
 763                 return 1;
 764         if (parse_notes_merge_strategy(value, strategy))
 765                 git_die_config(key, _("unknown notes merge strategy %s"), value);
 766
 767         free(value);
 768         return 0;
 769 }
 770
 771 static int merge(int argc, const char **argv, const char *prefix)
 772 {
 773         struct strbuf remote_ref = STRBUF_INIT, msg = STRBUF_INIT;
 774         struct object_id result_oid;
 775         struct notes_tree *t;
 776         struct notes_merge_options o;
 777         int do_merge = 0, do_commit = 0, do_abort = 0;
 778         int verbosity = 0, result;
 779         const char *strategy = NULL;
 780         struct option options[] = {
 781                 OPT_GROUP(N_("General options")),
 782                 OPT__VERBOSITY(&verbosity),
 783                 OPT_GROUP(N_("Merge options")),
 784                 OPT_STRING('s', "strategy", &strategy, N_("strategy"),
 785                            N_("resolve notes conflicts using the given strategy "
 786                               "(manual/ours/theirs/union/cat_sort_uniq)")),
 787                 OPT_GROUP(N_("Committing unmerged notes")),
 788                 OPT_SET_INT_F(0, "commit", &do_commit,
 789                               N_("finalize notes merge by committing unmerged notes"),
 790                               1, PARSE_OPT_NONEG),
 791                 OPT_GROUP(N_("Aborting notes merge resolution")),
 792                 OPT_SET_INT_F(0, "abort", &do_abort,
 793                               N_("abort notes merge"),
 794                               1, PARSE_OPT_NONEG),
 795                 OPT_END()
 796         };
 797
 798         argc = parse_options(argc, argv, prefix, options,
 799                              git_notes_merge_usage, 0);
 800
 801         if (strategy || do_commit + do_abort == 0)
 802                 do_merge = 1;
 803         if (do_merge + do_commit + do_abort != 1) {
 804                 error(_("cannot mix --commit, --abort or -s/--strategy"));
 805                 usage_with_options(git_notes_merge_usage, options);
 806         }
 807
 808         if (do_merge && argc != 1) {
 809                 error(_("must specify a notes ref to merge"));
 810                 usage_with_options(git_notes_merge_usage, options);
 811         } else if (!do_merge && argc) {
 812                 error(_("too many parameters"));
 813                 usage_with_options(git_notes_merge_usage, options);
 814         }
 815
 816         init_notes_merge_options(the_repository, &o);
 817         o.verbosity = verbosity + NOTES_MERGE_VERBOSITY_DEFAULT;
 818
 819         if (do_abort)
 820                 return merge_abort(&o);
 821         if (do_commit)
 822                 return merge_commit(&o);
 823
 824         o.local_ref = default_notes_ref();
 825         strbuf_addstr(&remote_ref, argv[0]);
 826         expand_loose_notes_ref(&remote_ref);
 827         o.remote_ref = remote_ref.buf;
 828
 829         t = init_notes_check("merge", NOTES_INIT_WRITABLE);
 830
 831         if (strategy) {
 832                 if (parse_notes_merge_strategy(strategy, &o.strategy)) {
 833                         error(_("unknown -s/--strategy: %s"), strategy);
 834                         usage_with_options(git_notes_merge_usage, options);
 835                 }
 836         } else {
 837                 struct strbuf merge_key = STRBUF_INIT;
 838                 const char *short_ref = NULL;
 839
 840                 if (!skip_prefix(o.local_ref, "refs/notes/", &short_ref))
 841                         BUG("local ref %s is outside of refs/notes/",
 842                             o.local_ref);
 843
 844                 strbuf_addf(&merge_key, "notes.%s.mergeStrategy", short_ref);
 845
 846                 if (git_config_get_notes_strategy(merge_key.buf, &o.strategy))
 847                         git_config_get_notes_strategy("notes.mergeStrategy", &o.strategy);
 848
 849                 strbuf_release(&merge_key);
 850         }
 851
 852         strbuf_addf(&msg, "notes: Merged notes from %s into %s",
 853                     remote_ref.buf, default_notes_ref());
 854         strbuf_add(&(o.commit_msg), msg.buf + 7, msg.len - 7); /* skip "notes: " */
 855
 856         result = notes_merge(&o, t, &result_oid);
 857
 858         if (result >= 0) /* Merge resulted (trivially) in result_oid */
 859                 /* Update default notes ref with new commit */
 860                 update_ref(msg.buf, default_notes_ref(), &result_oid, NULL, 0,
 861                            UPDATE_REFS_DIE_ON_ERR);
 862         else { /* Merge has unresolved conflicts */
 863                 const struct worktree *wt;
 864                 /* Update .git/NOTES_MERGE_PARTIAL with partial merge result */
 865                 update_ref(msg.buf, "NOTES_MERGE_PARTIAL", &result_oid, NULL,
 866                            0, UPDATE_REFS_DIE_ON_ERR);
 867                 /* Store ref-to-be-updated into .git/NOTES_MERGE_REF */
 868                 wt = find_shared_symref("NOTES_MERGE_REF", default_notes_ref());
 869                 if (wt)
 870                         die(_("a notes merge into %s is already in-progress at %s"),
 871                             default_notes_ref(), wt->path);
 872                 if (create_symref("NOTES_MERGE_REF", default_notes_ref(), NULL))
 873                         die(_("failed to store link to current notes ref (%s)"),
 874                             default_notes_ref());
 875                 fprintf(stderr, _("Automatic notes merge failed. Fix conflicts in %s "
 876                                   "and commit the result with 'git notes merge --commit', "
 877                                   "or abort the merge with 'git notes merge --abort'.\n"),
 878                         git_path(NOTES_MERGE_WORKTREE));
 879         }
 880
 881         free_notes(t);
 882         strbuf_release(&remote_ref);
 883         strbuf_release(&msg);
 884         return result < 0; /* return non-zero on conflicts */
 885 }
 886
 887 #define IGNORE_MISSING 1
 888
 889 static int remove_one_note(struct notes_tree *t, const char *name, unsigned flag)
 890 {
 891         int status;
 892         struct object_id oid;
 893         if (get_oid(name, &oid))
 894                 return error(_("Failed to resolve '%s' as a valid ref."), name);
 895         status = remove_note(t, oid.hash);
 896         if (status)
 897                 fprintf(stderr, _("Object %s has no note\n"), name);
 898         else
 899                 fprintf(stderr, _("Removing note for object %s\n"), name);
 900         return (flag & IGNORE_MISSING) ? 0 : status;
 901 }
 902
 903 static int remove_cmd(int argc, const char **argv, const char *prefix)
 904 {
 905         unsigned flag = 0;
 906         int from_stdin = 0;
 907         struct option options[] = {
 908                 OPT_BIT(0, "ignore-missing", &flag,
 909                         N_("attempt to remove non-existent note is not an error"),
 910                         IGNORE_MISSING),
 911                 OPT_BOOL(0, "stdin", &from_stdin,
 912                             N_("read object names from the standard input")),
 913                 OPT_END()
 914         };
 915         struct notes_tree *t;
 916         int retval = 0;
 917
 918         argc = parse_options(argc, argv, prefix, options,
 919                              git_notes_remove_usage, 0);
 920
 921         t = init_notes_check("remove", NOTES_INIT_WRITABLE);
 922
 923         if (!argc && !from_stdin) {
 924                 retval = remove_one_note(t, "HEAD", flag);
 925         } else {
 926                 while (*argv) {
 927                         retval |= remove_one_note(t, *argv, flag);
 928                         argv++;
 929                 }
 930         }
 931         if (from_stdin) {
 932                 struct strbuf sb = STRBUF_INIT;
 933                 while (strbuf_getwholeline(&sb, stdin, '\n') != EOF) {
 934                         strbuf_rtrim(&sb);
 935                         retval |= remove_one_note(t, sb.buf, flag);
 936                 }
 937                 strbuf_release(&sb);
 938         }
 939         if (!retval)
 940                 commit_notes(t, "Notes removed by 'git notes remove'");
 941         free_notes(t);
 942         return retval;
 943 }
 944
 945 static int prune(int argc, const char **argv, const char *prefix)
 946 {
 947         struct notes_tree *t;
 948         int show_only = 0, verbose = 0;
 949         struct option options[] = {
 950                 OPT__DRY_RUN(&show_only, N_("do not remove, show only")),
 951                 OPT__VERBOSE(&verbose, N_("report pruned notes")),
 952                 OPT_END()
 953         };
 954
 955         argc = parse_options(argc, argv, prefix, options, git_notes_prune_usage,
 956                              0);
 957
 958         if (argc) {
 959                 error(_("too many parameters"));
 960                 usage_with_options(git_notes_prune_usage, options);
 961         }
 962
 963         t = init_notes_check("prune", NOTES_INIT_WRITABLE);
 964
 965         prune_notes(t, (verbose ? NOTES_PRUNE_VERBOSE : 0) |
 966                 (show_only ? NOTES_PRUNE_VERBOSE|NOTES_PRUNE_DRYRUN : 0) );
 967         if (!show_only)
 968                 commit_notes(t, "Notes removed by 'git notes prune'");
 969         free_notes(t);
 970         return 0;
 971 }
 972
 973 static int get_ref(int argc, const char **argv, const char *prefix)
 974 {
 975         struct option options[] = { OPT_END() };
 976         argc = parse_options(argc, argv, prefix, options,
 977                              git_notes_get_ref_usage, 0);
 978
 979         if (argc) {
 980                 error(_("too many parameters"));
 981                 usage_with_options(git_notes_get_ref_usage, options);
 982         }
 983
 984         puts(default_notes_ref());
 985         return 0;
 986 }
 987
 988 int cmd_notes(int argc, const char **argv, const char *prefix)
 989 {
 990         int result;
 991         const char *override_notes_ref = NULL;
 992         struct option options[] = {
 993                 OPT_STRING(0, "ref", &override_notes_ref, N_("notes-ref"),
 994                            N_("use notes from <notes-ref>")),
 995                 OPT_END()
 996         };
 997
 998         git_config(git_default_config, NULL);
 999         argc = parse_options(argc, argv, prefix, options, git_notes_usage,
1000                              PARSE_OPT_STOP_AT_NON_OPTION);
1001
1002         if (override_notes_ref) {
1003                 struct strbuf sb = STRBUF_INIT;
1004                 strbuf_addstr(&sb, override_notes_ref);
1005                 expand_notes_ref(&sb);
1006                 setenv("GIT_NOTES_REF", sb.buf, 1);
1007                 strbuf_release(&sb);
1008         }
1009
1010         if (argc < 1 || !strcmp(argv[0], "list"))
1011                 result = list(argc, argv, prefix);
1012         else if (!strcmp(argv[0], "add"))
1013                 result = add(argc, argv, prefix);
1014         else if (!strcmp(argv[0], "copy"))
1015                 result = copy(argc, argv, prefix);
1016         else if (!strcmp(argv[0], "append") || !strcmp(argv[0], "edit"))
1017                 result = append_edit(argc, argv, prefix);
1018         else if (!strcmp(argv[0], "show"))
1019                 result = show(argc, argv, prefix);
1020         else if (!strcmp(argv[0], "merge"))
1021                 result = merge(argc, argv, prefix);
1022         else if (!strcmp(argv[0], "remove"))
1023                 result = remove_cmd(argc, argv, prefix);
1024         else if (!strcmp(argv[0], "prune"))
1025                 result = prune(argc, argv, prefix);
1026         else if (!strcmp(argv[0], "get-ref"))
1027                 result = get_ref(argc, argv, prefix);
1028         else {
1029                 result = error(_("unknown subcommand: %s"), argv[0]);
1030                 usage_with_options(git_notes_usage, options);
1031         }
1032
1033         return result ? 1 : 0;
1034 }