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 "builtin.h"
  12 #include "notes.h"
  13 #include "blob.h"
  14 #include "commit.h"
  15 #include "refs.h"
  16 #include "exec_cmd.h"
  17 #include "run-command.h"
  18 #include "parse-options.h"
  19 #include "string-list.h"
  20 #include "notes-merge.h"
  21
  22 static void commit_notes(struct notes_tree *t, const char *msg);
  23 static combine_notes_fn parse_combine_notes_fn(const char *v);
  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] [-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 [-m <msg> | -F <file> | (-c | -C) <object>] [<object>]"),
  30         N_("git notes [--ref <notes_ref>] edit [<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         "\nWrite/edit the notes for the following object:\n";
  96
  97 struct msg_arg {
  98         int given;
  99         int use_editor;
 100         struct strbuf buf;
 101 };
 102
 103 static int list_each_note(const unsigned char *object_sha1,
 104                 const unsigned char *note_sha1, char *note_path,
 105                 void *cb_data)
 106 {
 107         printf("%s %s\n", sha1_to_hex(note_sha1), sha1_to_hex(object_sha1));
 108         return 0;
 109 }
 110
 111 static void write_note_data(int fd, const unsigned char *sha1)
 112 {
 113         unsigned long size;
 114         enum object_type type;
 115         char *buf = read_sha1_file(sha1, &type, &size);
 116         if (buf) {
 117                 if (size)
 118                         write_or_die(fd, buf, size);
 119                 free(buf);
 120         }
 121 }
 122
 123 static void write_commented_object(int fd, const unsigned char *object)
 124 {
 125         const char *show_args[5] =
 126                 {"show", "--stat", "--no-notes", sha1_to_hex(object), NULL};
 127         struct child_process show;
 128         struct strbuf buf = STRBUF_INIT;
 129         struct strbuf cbuf = STRBUF_INIT;
 130
 131         /* Invoke "git show --stat --no-notes $object" */
 132         memset(&show, 0, sizeof(show));
 133         show.argv = show_args;
 134         show.no_stdin = 1;
 135         show.out = -1;
 136         show.err = 0;
 137         show.git_cmd = 1;
 138         if (start_command(&show))
 139                 die(_("unable to start 'show' for object '%s'"),
 140                     sha1_to_hex(object));
 141
 142         if (strbuf_read(&buf, show.out, 0) < 0)
 143                 die_errno(_("could not read 'show' output"));
 144         strbuf_add_commented_lines(&cbuf, buf.buf, buf.len);
 145         write_or_die(fd, cbuf.buf, cbuf.len);
 146
 147         strbuf_release(&cbuf);
 148         strbuf_release(&buf);
 149
 150         if (finish_command(&show))
 151                 die(_("failed to finish 'show' for object '%s'"),
 152                     sha1_to_hex(object));
 153 }
 154
 155 static void create_note(const unsigned char *object, struct msg_arg *msg,
 156                         int append_only, const unsigned char *prev,
 157                         unsigned char *result)
 158 {
 159         char *path = NULL;
 160
 161         if (msg->use_editor || !msg->given) {
 162                 int fd;
 163                 struct strbuf buf = STRBUF_INIT;
 164
 165                 /* write the template message before editing: */
 166                 path = git_pathdup("NOTES_EDITMSG");
 167                 fd = open(path, O_CREAT | O_TRUNC | O_WRONLY, 0600);
 168                 if (fd < 0)
 169                         die_errno(_("could not create file '%s'"), path);
 170
 171                 if (msg->given)
 172                         write_or_die(fd, msg->buf.buf, msg->buf.len);
 173                 else if (prev && !append_only)
 174                         write_note_data(fd, prev);
 175
 176                 strbuf_addch(&buf, '\n');
 177                 strbuf_add_commented_lines(&buf, note_template, strlen(note_template));
 178                 strbuf_addch(&buf, '\n');
 179                 write_or_die(fd, buf.buf, buf.len);
 180
 181                 write_commented_object(fd, object);
 182
 183                 close(fd);
 184                 strbuf_release(&buf);
 185                 strbuf_reset(&(msg->buf));
 186
 187                 if (launch_editor(path, &(msg->buf), NULL)) {
 188                         die(_("Please supply the note contents using either -m" \
 189                             " or -F option"));
 190                 }
 191                 stripspace(&(msg->buf), 1);
 192         }
 193
 194         if (prev && append_only) {
 195                 /* Append buf to previous note contents */
 196                 unsigned long size;
 197                 enum object_type type;
 198                 char *prev_buf = read_sha1_file(prev, &type, &size);
 199
 200                 strbuf_grow(&(msg->buf), size + 1);
 201                 if (msg->buf.len && prev_buf && size)
 202                         strbuf_insert(&(msg->buf), 0, "\n", 1);
 203                 if (prev_buf && size)
 204                         strbuf_insert(&(msg->buf), 0, prev_buf, size);
 205                 free(prev_buf);
 206         }
 207
 208         if (!msg->buf.len) {
 209                 fprintf(stderr, _("Removing note for object %s\n"),
 210                         sha1_to_hex(object));
 211                 hashclr(result);
 212         } else {
 213                 if (write_sha1_file(msg->buf.buf, msg->buf.len, blob_type, result)) {
 214                         error(_("unable to write note object"));
 215                         if (path)
 216                                 error(_("The note contents has been left in %s"),
 217                                       path);
 218                         exit(128);
 219                 }
 220         }
 221
 222         if (path) {
 223                 unlink_or_warn(path);
 224                 free(path);
 225         }
 226 }
 227
 228 static int parse_msg_arg(const struct option *opt, const char *arg, int unset)
 229 {
 230         struct msg_arg *msg = opt->value;
 231
 232         strbuf_grow(&(msg->buf), strlen(arg) + 2);
 233         if (msg->buf.len)
 234                 strbuf_addch(&(msg->buf), '\n');
 235         strbuf_addstr(&(msg->buf), arg);
 236         stripspace(&(msg->buf), 0);
 237
 238         msg->given = 1;
 239         return 0;
 240 }
 241
 242 static int parse_file_arg(const struct option *opt, const char *arg, int unset)
 243 {
 244         struct msg_arg *msg = opt->value;
 245
 246         if (msg->buf.len)
 247                 strbuf_addch(&(msg->buf), '\n');
 248         if (!strcmp(arg, "-")) {
 249                 if (strbuf_read(&(msg->buf), 0, 1024) < 0)
 250                         die_errno(_("cannot read '%s'"), arg);
 251         } else if (strbuf_read_file(&(msg->buf), arg, 1024) < 0)
 252                 die_errno(_("could not open or read '%s'"), arg);
 253         stripspace(&(msg->buf), 0);
 254
 255         msg->given = 1;
 256         return 0;
 257 }
 258
 259 static int parse_reuse_arg(const struct option *opt, const char *arg, int unset)
 260 {
 261         struct msg_arg *msg = opt->value;
 262         char *buf;
 263         unsigned char object[20];
 264         enum object_type type;
 265         unsigned long len;
 266
 267         if (msg->buf.len)
 268                 strbuf_addch(&(msg->buf), '\n');
 269
 270         if (get_sha1(arg, object))
 271                 die(_("Failed to resolve '%s' as a valid ref."), arg);
 272         if (!(buf = read_sha1_file(object, &type, &len)) || !len) {
 273                 free(buf);
 274                 die(_("Failed to read object '%s'."), arg);;
 275         }
 276         strbuf_add(&(msg->buf), buf, len);
 277         free(buf);
 278
 279         msg->given = 1;
 280         return 0;
 281 }
 282
 283 static int parse_reedit_arg(const struct option *opt, const char *arg, int unset)
 284 {
 285         struct msg_arg *msg = opt->value;
 286         msg->use_editor = 1;
 287         return parse_reuse_arg(opt, arg, unset);
 288 }
 289
 290 static void commit_notes(struct notes_tree *t, const char *msg)
 291 {
 292         struct strbuf buf = STRBUF_INIT;
 293         unsigned char commit_sha1[20];
 294
 295         if (!t)
 296                 t = &default_notes_tree;
 297         if (!t->initialized || !t->ref || !*t->ref)
 298                 die(_("Cannot commit uninitialized/unreferenced notes tree"));
 299         if (!t->dirty)
 300                 return; /* don't have to commit an unchanged tree */
 301
 302         /* Prepare commit message and reflog message */
 303         strbuf_addstr(&buf, msg);
 304         if (buf.buf[buf.len - 1] != '\n')
 305                 strbuf_addch(&buf, '\n'); /* Make sure msg ends with newline */
 306
 307         create_notes_commit(t, NULL, &buf, commit_sha1);
 308         strbuf_insert(&buf, 0, "notes: ", 7); /* commit message starts at index 7 */
 309         update_ref(buf.buf, t->ref, commit_sha1, NULL, 0, DIE_ON_ERR);
 310
 311         strbuf_release(&buf);
 312 }
 313
 314 static combine_notes_fn parse_combine_notes_fn(const char *v)
 315 {
 316         if (!strcasecmp(v, "overwrite"))
 317                 return combine_notes_overwrite;
 318         else if (!strcasecmp(v, "ignore"))
 319                 return combine_notes_ignore;
 320         else if (!strcasecmp(v, "concatenate"))
 321                 return combine_notes_concatenate;
 322         else if (!strcasecmp(v, "cat_sort_uniq"))
 323                 return combine_notes_cat_sort_uniq;
 324         else
 325                 return NULL;
 326 }
 327
 328 static int notes_rewrite_config(const char *k, const char *v, void *cb)
 329 {
 330         struct notes_rewrite_cfg *c = cb;
 331         if (!prefixcmp(k, "notes.rewrite.") && !strcmp(k+14, c->cmd)) {
 332                 c->enabled = git_config_bool(k, v);
 333                 return 0;
 334         } else if (!c->mode_from_env && !strcmp(k, "notes.rewritemode")) {
 335                 if (!v)
 336                         config_error_nonbool(k);
 337                 c->combine = parse_combine_notes_fn(v);
 338                 if (!c->combine) {
 339                         error(_("Bad notes.rewriteMode value: '%s'"), v);
 340                         return 1;
 341                 }
 342                 return 0;
 343         } else if (!c->refs_from_env && !strcmp(k, "notes.rewriteref")) {
 344                 /* note that a refs/ prefix is implied in the
 345                  * underlying for_each_glob_ref */
 346                 if (!prefixcmp(v, "refs/notes/"))
 347                         string_list_add_refs_by_glob(c->refs, v);
 348                 else
 349                         warning(_("Refusing to rewrite notes in %s"
 350                                 " (outside of refs/notes/)"), v);
 351                 return 0;
 352         }
 353
 354         return 0;
 355 }
 356
 357
 358 struct notes_rewrite_cfg *init_copy_notes_for_rewrite(const char *cmd)
 359 {
 360         struct notes_rewrite_cfg *c = xmalloc(sizeof(struct notes_rewrite_cfg));
 361         const char *rewrite_mode_env = getenv(GIT_NOTES_REWRITE_MODE_ENVIRONMENT);
 362         const char *rewrite_refs_env = getenv(GIT_NOTES_REWRITE_REF_ENVIRONMENT);
 363         c->cmd = cmd;
 364         c->enabled = 1;
 365         c->combine = combine_notes_concatenate;
 366         c->refs = xcalloc(1, sizeof(struct string_list));
 367         c->refs->strdup_strings = 1;
 368         c->refs_from_env = 0;
 369         c->mode_from_env = 0;
 370         if (rewrite_mode_env) {
 371                 c->mode_from_env = 1;
 372                 c->combine = parse_combine_notes_fn(rewrite_mode_env);
 373                 if (!c->combine)
 374                         /* TRANSLATORS: The first %s is the name of the
 375                            environment variable, the second %s is its value */
 376                         error(_("Bad %s value: '%s'"), GIT_NOTES_REWRITE_MODE_ENVIRONMENT,
 377                                         rewrite_mode_env);
 378         }
 379         if (rewrite_refs_env) {
 380                 c->refs_from_env = 1;
 381                 string_list_add_refs_from_colon_sep(c->refs, rewrite_refs_env);
 382         }
 383         git_config(notes_rewrite_config, c);
 384         if (!c->enabled || !c->refs->nr) {
 385                 string_list_clear(c->refs, 0);
 386                 free(c->refs);
 387                 free(c);
 388                 return NULL;
 389         }
 390         c->trees = load_notes_trees(c->refs);
 391         string_list_clear(c->refs, 0);
 392         free(c->refs);
 393         return c;
 394 }
 395
 396 int copy_note_for_rewrite(struct notes_rewrite_cfg *c,
 397                           const unsigned char *from_obj, const unsigned char *to_obj)
 398 {
 399         int ret = 0;
 400         int i;
 401         for (i = 0; c->trees[i]; i++)
 402                 ret = copy_note(c->trees[i], from_obj, to_obj, 1, c->combine) || ret;
 403         return ret;
 404 }
 405
 406 void finish_copy_notes_for_rewrite(struct notes_rewrite_cfg *c)
 407 {
 408         int i;
 409         for (i = 0; c->trees[i]; i++) {
 410                 commit_notes(c->trees[i], "Notes added by 'git notes copy'");
 411                 free_notes(c->trees[i]);
 412         }
 413         free(c->trees);
 414         free(c);
 415 }
 416
 417 static int notes_copy_from_stdin(int force, const char *rewrite_cmd)
 418 {
 419         struct strbuf buf = STRBUF_INIT;
 420         struct notes_rewrite_cfg *c = NULL;
 421         struct notes_tree *t = NULL;
 422         int ret = 0;
 423
 424         if (rewrite_cmd) {
 425                 c = init_copy_notes_for_rewrite(rewrite_cmd);
 426                 if (!c)
 427                         return 0;
 428         } else {
 429                 init_notes(NULL, NULL, NULL, 0);
 430                 t = &default_notes_tree;
 431         }
 432
 433         while (strbuf_getline(&buf, stdin, '\n') != EOF) {
 434                 unsigned char from_obj[20], to_obj[20];
 435                 struct strbuf **split;
 436                 int err;
 437
 438                 split = strbuf_split(&buf, ' ');
 439                 if (!split[0] || !split[1])
 440                         die(_("Malformed input line: '%s'."), buf.buf);
 441                 strbuf_rtrim(split[0]);
 442                 strbuf_rtrim(split[1]);
 443                 if (get_sha1(split[0]->buf, from_obj))
 444                         die(_("Failed to resolve '%s' as a valid ref."), split[0]->buf);
 445                 if (get_sha1(split[1]->buf, to_obj))
 446                         die(_("Failed to resolve '%s' as a valid ref."), split[1]->buf);
 447
 448                 if (rewrite_cmd)
 449                         err = copy_note_for_rewrite(c, from_obj, to_obj);
 450                 else
 451                         err = copy_note(t, from_obj, to_obj, force,
 452                                         combine_notes_overwrite);
 453
 454                 if (err) {
 455                         error(_("Failed to copy notes from '%s' to '%s'"),
 456                               split[0]->buf, split[1]->buf);
 457                         ret = 1;
 458                 }
 459
 460                 strbuf_list_free(split);
 461         }
 462
 463         if (!rewrite_cmd) {
 464                 commit_notes(t, "Notes added by 'git notes copy'");
 465                 free_notes(t);
 466         } else {
 467                 finish_copy_notes_for_rewrite(c);
 468         }
 469         return ret;
 470 }
 471
 472 static struct notes_tree *init_notes_check(const char *subcommand)
 473 {
 474         struct notes_tree *t;
 475         init_notes(NULL, NULL, NULL, 0);
 476         t = &default_notes_tree;
 477
 478         if (prefixcmp(t->ref, "refs/notes/"))
 479                 die("Refusing to %s notes in %s (outside of refs/notes/)",
 480                     subcommand, t->ref);
 481         return t;
 482 }
 483
 484 static int list(int argc, const char **argv, const char *prefix)
 485 {
 486         struct notes_tree *t;
 487         unsigned char object[20];
 488         const unsigned char *note;
 489         int retval = -1;
 490         struct option options[] = {
 491                 OPT_END()
 492         };
 493
 494         if (argc)
 495                 argc = parse_options(argc, argv, prefix, options,
 496                                      git_notes_list_usage, 0);
 497
 498         if (1 < argc) {
 499                 error(_("too many parameters"));
 500                 usage_with_options(git_notes_list_usage, options);
 501         }
 502
 503         t = init_notes_check("list");
 504         if (argc) {
 505                 if (get_sha1(argv[0], object))
 506                         die(_("Failed to resolve '%s' as a valid ref."), argv[0]);
 507                 note = get_note(t, object);
 508                 if (note) {
 509                         puts(sha1_to_hex(note));
 510                         retval = 0;
 511                 } else
 512                         retval = error(_("No note found for object %s."),
 513                                        sha1_to_hex(object));
 514         } else
 515                 retval = for_each_note(t, 0, list_each_note, NULL);
 516
 517         free_notes(t);
 518         return retval;
 519 }
 520
 521 static int append_edit(int argc, const char **argv, const char *prefix);
 522
 523 static int add(int argc, const char **argv, const char *prefix)
 524 {
 525         int retval = 0, force = 0;
 526         const char *object_ref;
 527         struct notes_tree *t;
 528         unsigned char object[20], new_note[20];
 529         char logmsg[100];
 530         const unsigned char *note;
 531         struct msg_arg msg = { 0, 0, STRBUF_INIT };
 532         struct option options[] = {
 533                 { OPTION_CALLBACK, 'm', "message", &msg, N_("message"),
 534                         N_("note contents as a string"), PARSE_OPT_NONEG,
 535                         parse_msg_arg},
 536                 { OPTION_CALLBACK, 'F', "file", &msg, N_("file"),
 537                         N_("note contents in a file"), PARSE_OPT_NONEG,
 538                         parse_file_arg},
 539                 { OPTION_CALLBACK, 'c', "reedit-message", &msg, N_("object"),
 540                         N_("reuse and edit specified note object"), PARSE_OPT_NONEG,
 541                         parse_reedit_arg},
 542                 { OPTION_CALLBACK, 'C', "reuse-message", &msg, N_("object"),
 543                         N_("reuse specified note object"), PARSE_OPT_NONEG,
 544                         parse_reuse_arg},
 545                 OPT__FORCE(&force, N_("replace existing notes")),
 546                 OPT_END()
 547         };
 548
 549         argc = parse_options(argc, argv, prefix, options, git_notes_add_usage,
 550                              PARSE_OPT_KEEP_ARGV0);
 551
 552         if (2 < argc) {
 553                 error(_("too many parameters"));
 554                 usage_with_options(git_notes_add_usage, options);
 555         }
 556
 557         object_ref = argc > 1 ? argv[1] : "HEAD";
 558
 559         if (get_sha1(object_ref, object))
 560                 die(_("Failed to resolve '%s' as a valid ref."), object_ref);
 561
 562         t = init_notes_check("add");
 563         note = get_note(t, object);
 564
 565         if (note) {
 566                 if (!force) {
 567                         if (!msg.given) {
 568                                 /*
 569                                  * Redirect to "edit" subcommand.
 570                                  *
 571                                  * We only end up here if none of -m/-F/-c/-C
 572                                  * or -f are given. The original args are
 573                                  * therefore still in argv[0-1].
 574                                  */
 575                                 argv[0] = "edit";
 576                                 free_notes(t);
 577                                 return append_edit(argc, argv, prefix);
 578                         }
 579                         retval = error(_("Cannot add notes. Found existing notes "
 580                                        "for object %s. Use '-f' to overwrite "
 581                                        "existing notes"), sha1_to_hex(object));
 582                         goto out;
 583                 }
 584                 fprintf(stderr, _("Overwriting existing notes for object %s\n"),
 585                         sha1_to_hex(object));
 586         }
 587
 588         create_note(object, &msg, 0, note, new_note);
 589
 590         if (is_null_sha1(new_note))
 591                 remove_note(t, object);
 592         else if (add_note(t, object, new_note, combine_notes_overwrite))
 593                 die("BUG: combine_notes_overwrite failed");
 594
 595         snprintf(logmsg, sizeof(logmsg), "Notes %s by 'git notes %s'",
 596                  is_null_sha1(new_note) ? "removed" : "added", "add");
 597         commit_notes(t, logmsg);
 598 out:
 599         free_notes(t);
 600         strbuf_release(&(msg.buf));
 601         return retval;
 602 }
 603
 604 static int copy(int argc, const char **argv, const char *prefix)
 605 {
 606         int retval = 0, force = 0, from_stdin = 0;
 607         const unsigned char *from_note, *note;
 608         const char *object_ref;
 609         unsigned char object[20], from_obj[20];
 610         struct notes_tree *t;
 611         const char *rewrite_cmd = NULL;
 612         struct option options[] = {
 613                 OPT__FORCE(&force, N_("replace existing notes")),
 614                 OPT_BOOLEAN(0, "stdin", &from_stdin, N_("read objects from stdin")),
 615                 OPT_STRING(0, "for-rewrite", &rewrite_cmd, N_("command"),
 616                            N_("load rewriting config for <command> (implies "
 617                               "--stdin)")),
 618                 OPT_END()
 619         };
 620
 621         argc = parse_options(argc, argv, prefix, options, git_notes_copy_usage,
 622                              0);
 623
 624         if (from_stdin || rewrite_cmd) {
 625                 if (argc) {
 626                         error(_("too many parameters"));
 627                         usage_with_options(git_notes_copy_usage, options);
 628                 } else {
 629                         return notes_copy_from_stdin(force, rewrite_cmd);
 630                 }
 631         }
 632
 633         if (argc < 2) {
 634                 error(_("too few parameters"));
 635                 usage_with_options(git_notes_copy_usage, options);
 636         }
 637         if (2 < argc) {
 638                 error(_("too many parameters"));
 639                 usage_with_options(git_notes_copy_usage, options);
 640         }
 641
 642         if (get_sha1(argv[0], from_obj))
 643                 die(_("Failed to resolve '%s' as a valid ref."), argv[0]);
 644
 645         object_ref = 1 < argc ? argv[1] : "HEAD";
 646
 647         if (get_sha1(object_ref, object))
 648                 die(_("Failed to resolve '%s' as a valid ref."), object_ref);
 649
 650         t = init_notes_check("copy");
 651         note = get_note(t, object);
 652
 653         if (note) {
 654                 if (!force) {
 655                         retval = error(_("Cannot copy notes. Found existing "
 656                                        "notes for object %s. Use '-f' to "
 657                                        "overwrite existing notes"),
 658                                        sha1_to_hex(object));
 659                         goto out;
 660                 }
 661                 fprintf(stderr, _("Overwriting existing notes for object %s\n"),
 662                         sha1_to_hex(object));
 663         }
 664
 665         from_note = get_note(t, from_obj);
 666         if (!from_note) {
 667                 retval = error(_("Missing notes on source object %s. Cannot "
 668                                "copy."), sha1_to_hex(from_obj));
 669                 goto out;
 670         }
 671
 672         if (add_note(t, object, from_note, combine_notes_overwrite))
 673                 die("BUG: combine_notes_overwrite failed");
 674         commit_notes(t, "Notes added by 'git notes copy'");
 675 out:
 676         free_notes(t);
 677         return retval;
 678 }
 679
 680 static int append_edit(int argc, const char **argv, const char *prefix)
 681 {
 682         const char *object_ref;
 683         struct notes_tree *t;
 684         unsigned char object[20], new_note[20];
 685         const unsigned char *note;
 686         char logmsg[100];
 687         const char * const *usage;
 688         struct msg_arg msg = { 0, 0, STRBUF_INIT };
 689         struct option options[] = {
 690                 { OPTION_CALLBACK, 'm', "message", &msg, N_("message"),
 691                         N_("note contents as a string"), PARSE_OPT_NONEG,
 692                         parse_msg_arg},
 693                 { OPTION_CALLBACK, 'F', "file", &msg, N_("file"),
 694                         N_("note contents in a file"), PARSE_OPT_NONEG,
 695                         parse_file_arg},
 696                 { OPTION_CALLBACK, 'c', "reedit-message", &msg, N_("object"),
 697                         N_("reuse and edit specified note object"), PARSE_OPT_NONEG,
 698                         parse_reedit_arg},
 699                 { OPTION_CALLBACK, 'C', "reuse-message", &msg, N_("object"),
 700                         N_("reuse specified note object"), PARSE_OPT_NONEG,
 701                         parse_reuse_arg},
 702                 OPT_END()
 703         };
 704         int edit = !strcmp(argv[0], "edit");
 705
 706         usage = edit ? git_notes_edit_usage : git_notes_append_usage;
 707         argc = parse_options(argc, argv, prefix, options, usage,
 708                              PARSE_OPT_KEEP_ARGV0);
 709
 710         if (2 < argc) {
 711                 error(_("too many parameters"));
 712                 usage_with_options(usage, options);
 713         }
 714
 715         if (msg.given && edit)
 716                 fprintf(stderr, _("The -m/-F/-c/-C options have been deprecated "
 717                         "for the 'edit' subcommand.\n"
 718                         "Please use 'git notes add -f -m/-F/-c/-C' instead.\n"));
 719
 720         object_ref = 1 < argc ? argv[1] : "HEAD";
 721
 722         if (get_sha1(object_ref, object))
 723                 die(_("Failed to resolve '%s' as a valid ref."), object_ref);
 724
 725         t = init_notes_check(argv[0]);
 726         note = get_note(t, object);
 727
 728         create_note(object, &msg, !edit, note, new_note);
 729
 730         if (is_null_sha1(new_note))
 731                 remove_note(t, object);
 732         else if (add_note(t, object, new_note, combine_notes_overwrite))
 733                 die("BUG: combine_notes_overwrite failed");
 734
 735         snprintf(logmsg, sizeof(logmsg), "Notes %s by 'git notes %s'",
 736                  is_null_sha1(new_note) ? "removed" : "added", argv[0]);
 737         commit_notes(t, logmsg);
 738         free_notes(t);
 739         strbuf_release(&(msg.buf));
 740         return 0;
 741 }
 742
 743 static int show(int argc, const char **argv, const char *prefix)
 744 {
 745         const char *object_ref;
 746         struct notes_tree *t;
 747         unsigned char object[20];
 748         const unsigned char *note;
 749         int retval;
 750         struct option options[] = {
 751                 OPT_END()
 752         };
 753
 754         argc = parse_options(argc, argv, prefix, options, git_notes_show_usage,
 755                              0);
 756
 757         if (1 < argc) {
 758                 error(_("too many parameters"));
 759                 usage_with_options(git_notes_show_usage, options);
 760         }
 761
 762         object_ref = argc ? argv[0] : "HEAD";
 763
 764         if (get_sha1(object_ref, object))
 765                 die(_("Failed to resolve '%s' as a valid ref."), object_ref);
 766
 767         t = init_notes_check("show");
 768         note = get_note(t, object);
 769
 770         if (!note)
 771                 retval = error(_("No note found for object %s."),
 772                                sha1_to_hex(object));
 773         else {
 774                 const char *show_args[3] = {"show", sha1_to_hex(note), NULL};
 775                 retval = execv_git_cmd(show_args);
 776         }
 777         free_notes(t);
 778         return retval;
 779 }
 780
 781 static int merge_abort(struct notes_merge_options *o)
 782 {
 783         int ret = 0;
 784
 785         /*
 786          * Remove .git/NOTES_MERGE_PARTIAL and .git/NOTES_MERGE_REF, and call
 787          * notes_merge_abort() to remove .git/NOTES_MERGE_WORKTREE.
 788          */
 789
 790         if (delete_ref("NOTES_MERGE_PARTIAL", NULL, 0))
 791                 ret += error("Failed to delete ref NOTES_MERGE_PARTIAL");
 792         if (delete_ref("NOTES_MERGE_REF", NULL, REF_NODEREF))
 793                 ret += error("Failed to delete ref NOTES_MERGE_REF");
 794         if (notes_merge_abort(o))
 795                 ret += error("Failed to remove 'git notes merge' worktree");
 796         return ret;
 797 }
 798
 799 static int merge_commit(struct notes_merge_options *o)
 800 {
 801         struct strbuf msg = STRBUF_INIT;
 802         unsigned char sha1[20], parent_sha1[20];
 803         struct notes_tree *t;
 804         struct commit *partial;
 805         struct pretty_print_context pretty_ctx;
 806         void *local_ref_to_free;
 807         int ret;
 808
 809         /*
 810          * Read partial merge result from .git/NOTES_MERGE_PARTIAL,
 811          * and target notes ref from .git/NOTES_MERGE_REF.
 812          */
 813
 814         if (get_sha1("NOTES_MERGE_PARTIAL", sha1))
 815                 die("Failed to read ref NOTES_MERGE_PARTIAL");
 816         else if (!(partial = lookup_commit_reference(sha1)))
 817                 die("Could not find commit from NOTES_MERGE_PARTIAL.");
 818         else if (parse_commit(partial))
 819                 die("Could not parse commit from NOTES_MERGE_PARTIAL.");
 820
 821         if (partial->parents)
 822                 hashcpy(parent_sha1, partial->parents->item->object.sha1);
 823         else
 824                 hashclr(parent_sha1);
 825
 826         t = xcalloc(1, sizeof(struct notes_tree));
 827         init_notes(t, "NOTES_MERGE_PARTIAL", combine_notes_overwrite, 0);
 828
 829         o->local_ref = local_ref_to_free =
 830                 resolve_refdup("NOTES_MERGE_REF", sha1, 0, NULL);
 831         if (!o->local_ref)
 832                 die("Failed to resolve NOTES_MERGE_REF");
 833
 834         if (notes_merge_commit(o, t, partial, sha1))
 835                 die("Failed to finalize notes merge");
 836
 837         /* Reuse existing commit message in reflog message */
 838         memset(&pretty_ctx, 0, sizeof(pretty_ctx));
 839         format_commit_message(partial, "%s", &msg, &pretty_ctx);
 840         strbuf_trim(&msg);
 841         strbuf_insert(&msg, 0, "notes: ", 7);
 842         update_ref(msg.buf, o->local_ref, sha1,
 843                    is_null_sha1(parent_sha1) ? NULL : parent_sha1,
 844                    0, DIE_ON_ERR);
 845
 846         free_notes(t);
 847         strbuf_release(&msg);
 848         ret = merge_abort(o);
 849         free(local_ref_to_free);
 850         return ret;
 851 }
 852
 853 static int merge(int argc, const char **argv, const char *prefix)
 854 {
 855         struct strbuf remote_ref = STRBUF_INIT, msg = STRBUF_INIT;
 856         unsigned char result_sha1[20];
 857         struct notes_tree *t;
 858         struct notes_merge_options o;
 859         int do_merge = 0, do_commit = 0, do_abort = 0;
 860         int verbosity = 0, result;
 861         const char *strategy = NULL;
 862         struct option options[] = {
 863                 OPT_GROUP(N_("General options")),
 864                 OPT__VERBOSITY(&verbosity),
 865                 OPT_GROUP(N_("Merge options")),
 866                 OPT_STRING('s', "strategy", &strategy, N_("strategy"),
 867                            N_("resolve notes conflicts using the given strategy "
 868                               "(manual/ours/theirs/union/cat_sort_uniq)")),
 869                 OPT_GROUP(N_("Committing unmerged notes")),
 870                 { OPTION_BOOLEAN, 0, "commit", &do_commit, NULL,
 871                         N_("finalize notes merge by committing unmerged notes"),
 872                         PARSE_OPT_NOARG | PARSE_OPT_NONEG },
 873                 OPT_GROUP(N_("Aborting notes merge resolution")),
 874                 { OPTION_BOOLEAN, 0, "abort", &do_abort, NULL,
 875                         N_("abort notes merge"),
 876                         PARSE_OPT_NOARG | PARSE_OPT_NONEG },
 877                 OPT_END()
 878         };
 879
 880         argc = parse_options(argc, argv, prefix, options,
 881                              git_notes_merge_usage, 0);
 882
 883         if (strategy || do_commit + do_abort == 0)
 884                 do_merge = 1;
 885         if (do_merge + do_commit + do_abort != 1) {
 886                 error("cannot mix --commit, --abort or -s/--strategy");
 887                 usage_with_options(git_notes_merge_usage, options);
 888         }
 889
 890         if (do_merge && argc != 1) {
 891                 error("Must specify a notes ref to merge");
 892                 usage_with_options(git_notes_merge_usage, options);
 893         } else if (!do_merge && argc) {
 894                 error("too many parameters");
 895                 usage_with_options(git_notes_merge_usage, options);
 896         }
 897
 898         init_notes_merge_options(&o);
 899         o.verbosity = verbosity + NOTES_MERGE_VERBOSITY_DEFAULT;
 900
 901         if (do_abort)
 902                 return merge_abort(&o);
 903         if (do_commit)
 904                 return merge_commit(&o);
 905
 906         o.local_ref = default_notes_ref();
 907         strbuf_addstr(&remote_ref, argv[0]);
 908         expand_notes_ref(&remote_ref);
 909         o.remote_ref = remote_ref.buf;
 910
 911         if (strategy) {
 912                 if (!strcmp(strategy, "manual"))
 913                         o.strategy = NOTES_MERGE_RESOLVE_MANUAL;
 914                 else if (!strcmp(strategy, "ours"))
 915                         o.strategy = NOTES_MERGE_RESOLVE_OURS;
 916                 else if (!strcmp(strategy, "theirs"))
 917                         o.strategy = NOTES_MERGE_RESOLVE_THEIRS;
 918                 else if (!strcmp(strategy, "union"))
 919                         o.strategy = NOTES_MERGE_RESOLVE_UNION;
 920                 else if (!strcmp(strategy, "cat_sort_uniq"))
 921                         o.strategy = NOTES_MERGE_RESOLVE_CAT_SORT_UNIQ;
 922                 else {
 923                         error("Unknown -s/--strategy: %s", strategy);
 924                         usage_with_options(git_notes_merge_usage, options);
 925                 }
 926         }
 927
 928         t = init_notes_check("merge");
 929
 930         strbuf_addf(&msg, "notes: Merged notes from %s into %s",
 931                     remote_ref.buf, default_notes_ref());
 932         strbuf_add(&(o.commit_msg), msg.buf + 7, msg.len - 7); /* skip "notes: " */
 933
 934         result = notes_merge(&o, t, result_sha1);
 935
 936         if (result >= 0) /* Merge resulted (trivially) in result_sha1 */
 937                 /* Update default notes ref with new commit */
 938                 update_ref(msg.buf, default_notes_ref(), result_sha1, NULL,
 939                            0, DIE_ON_ERR);
 940         else { /* Merge has unresolved conflicts */
 941                 /* Update .git/NOTES_MERGE_PARTIAL with partial merge result */
 942                 update_ref(msg.buf, "NOTES_MERGE_PARTIAL", result_sha1, NULL,
 943                            0, DIE_ON_ERR);
 944                 /* Store ref-to-be-updated into .git/NOTES_MERGE_REF */
 945                 if (create_symref("NOTES_MERGE_REF", default_notes_ref(), NULL))
 946                         die("Failed to store link to current notes ref (%s)",
 947                             default_notes_ref());
 948                 printf("Automatic notes merge failed. Fix conflicts in %s and "
 949                        "commit the result with 'git notes merge --commit', or "
 950                        "abort the merge with 'git notes merge --abort'.\n",
 951                        git_path(NOTES_MERGE_WORKTREE));
 952         }
 953
 954         free_notes(t);
 955         strbuf_release(&remote_ref);
 956         strbuf_release(&msg);
 957         return result < 0; /* return non-zero on conflicts */
 958 }
 959
 960 #define IGNORE_MISSING 1
 961
 962 static int remove_one_note(struct notes_tree *t, const char *name, unsigned flag)
 963 {
 964         int status;
 965         unsigned char sha1[20];
 966         if (get_sha1(name, sha1))
 967                 return error(_("Failed to resolve '%s' as a valid ref."), name);
 968         status = remove_note(t, sha1);
 969         if (status)
 970                 fprintf(stderr, _("Object %s has no note\n"), name);
 971         else
 972                 fprintf(stderr, _("Removing note for object %s\n"), name);
 973         return (flag & IGNORE_MISSING) ? 0 : status;
 974 }
 975
 976 static int remove_cmd(int argc, const char **argv, const char *prefix)
 977 {
 978         unsigned flag = 0;
 979         int from_stdin = 0;
 980         struct option options[] = {
 981                 OPT_BIT(0, "ignore-missing", &flag,
 982                         N_("attempt to remove non-existent note is not an error"),
 983                         IGNORE_MISSING),
 984                 OPT_BOOLEAN(0, "stdin", &from_stdin,
 985                             N_("read object names from the standard input")),
 986                 OPT_END()
 987         };
 988         struct notes_tree *t;
 989         int retval = 0;
 990
 991         argc = parse_options(argc, argv, prefix, options,
 992                              git_notes_remove_usage, 0);
 993
 994         t = init_notes_check("remove");
 995
 996         if (!argc && !from_stdin) {
 997                 retval = remove_one_note(t, "HEAD", flag);
 998         } else {
 999                 while (*argv) {
1000                         retval |= remove_one_note(t, *argv, flag);
1001                         argv++;
1002                 }
1003         }
1004         if (from_stdin) {
1005                 struct strbuf sb = STRBUF_INIT;
1006                 while (strbuf_getwholeline(&sb, stdin, '\n') != EOF) {
1007                         strbuf_rtrim(&sb);
1008                         retval |= remove_one_note(t, sb.buf, flag);
1009                 }
1010                 strbuf_release(&sb);
1011         }
1012         if (!retval)
1013                 commit_notes(t, "Notes removed by 'git notes remove'");
1014         free_notes(t);
1015         return retval;
1016 }
1017
1018 static int prune(int argc, const char **argv, const char *prefix)
1019 {
1020         struct notes_tree *t;
1021         int show_only = 0, verbose = 0;
1022         struct option options[] = {
1023                 OPT__DRY_RUN(&show_only, "do not remove, show only"),
1024                 OPT__VERBOSE(&verbose, "report pruned notes"),
1025                 OPT_END()
1026         };
1027
1028         argc = parse_options(argc, argv, prefix, options, git_notes_prune_usage,
1029                              0);
1030
1031         if (argc) {
1032                 error(_("too many parameters"));
1033                 usage_with_options(git_notes_prune_usage, options);
1034         }
1035
1036         t = init_notes_check("prune");
1037
1038         prune_notes(t, (verbose ? NOTES_PRUNE_VERBOSE : 0) |
1039                 (show_only ? NOTES_PRUNE_VERBOSE|NOTES_PRUNE_DRYRUN : 0) );
1040         if (!show_only)
1041                 commit_notes(t, "Notes removed by 'git notes prune'");
1042         free_notes(t);
1043         return 0;
1044 }
1045
1046 static int get_ref(int argc, const char **argv, const char *prefix)
1047 {
1048         struct option options[] = { OPT_END() };
1049         argc = parse_options(argc, argv, prefix, options,
1050                              git_notes_get_ref_usage, 0);
1051
1052         if (argc) {
1053                 error("too many parameters");
1054                 usage_with_options(git_notes_get_ref_usage, options);
1055         }
1056
1057         puts(default_notes_ref());
1058         return 0;
1059 }
1060
1061 int cmd_notes(int argc, const char **argv, const char *prefix)
1062 {
1063         int result;
1064         const char *override_notes_ref = NULL;
1065         struct option options[] = {
1066                 OPT_STRING(0, "ref", &override_notes_ref, N_("notes_ref"),
1067                            N_("use notes from <notes_ref>")),
1068                 OPT_END()
1069         };
1070
1071         git_config(git_default_config, NULL);
1072         argc = parse_options(argc, argv, prefix, options, git_notes_usage,
1073                              PARSE_OPT_STOP_AT_NON_OPTION);
1074
1075         if (override_notes_ref) {
1076                 struct strbuf sb = STRBUF_INIT;
1077                 strbuf_addstr(&sb, override_notes_ref);
1078                 expand_notes_ref(&sb);
1079                 setenv("GIT_NOTES_REF", sb.buf, 1);
1080                 strbuf_release(&sb);
1081         }
1082
1083         if (argc < 1 || !strcmp(argv[0], "list"))
1084                 result = list(argc, argv, prefix);
1085         else if (!strcmp(argv[0], "add"))
1086                 result = add(argc, argv, prefix);
1087         else if (!strcmp(argv[0], "copy"))
1088                 result = copy(argc, argv, prefix);
1089         else if (!strcmp(argv[0], "append") || !strcmp(argv[0], "edit"))
1090                 result = append_edit(argc, argv, prefix);
1091         else if (!strcmp(argv[0], "show"))
1092                 result = show(argc, argv, prefix);
1093         else if (!strcmp(argv[0], "merge"))
1094                 result = merge(argc, argv, prefix);
1095         else if (!strcmp(argv[0], "remove"))
1096                 result = remove_cmd(argc, argv, prefix);
1097         else if (!strcmp(argv[0], "prune"))
1098                 result = prune(argc, argv, prefix);
1099         else if (!strcmp(argv[0], "get-ref"))
1100                 result = get_ref(argc, argv, prefix);
1101         else {
1102                 result = error(_("Unknown subcommand: %s"), argv[0]);
1103                 usage_with_options(git_notes_usage, options);
1104         }
1105
1106         return result ? 1 : 0;
1107 }