Andrew's git - gitweb.git/blob

6a80714b3e3e40371de1ff6d4114934f4edec1e9
   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
  22static void commit_notes(struct notes_tree *t, const char *msg);
  23static combine_notes_fn parse_combine_notes_fn(const char *v);
  24
  25static 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
  41static const char * const git_notes_list_usage[] = {
  42        N_("git notes [list [<object>]]"),
  43        NULL
  44};
  45
  46static const char * const git_notes_add_usage[] = {
  47        N_("git notes add [<options>] [<object>]"),
  48        NULL
  49};
  50
  51static 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
  57static const char * const git_notes_append_usage[] = {
  58        N_("git notes append [<options>] [<object>]"),
  59        NULL
  60};
  61
  62static const char * const git_notes_edit_usage[] = {
  63        N_("git notes edit [<object>]"),
  64        NULL
  65};
  66
  67static const char * const git_notes_show_usage[] = {
  68        N_("git notes show [<object>]"),
  69        NULL
  70};
  71
  72static 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
  79static const char * const git_notes_remove_usage[] = {
  80        N_("git notes remove [<object>]"),
  81        NULL
  82};
  83
  84static const char * const git_notes_prune_usage[] = {
  85        N_("git notes prune [<options>]"),
  86        NULL
  87};
  88
  89static const char * const git_notes_get_ref_usage[] = {
  90        N_("git notes get-ref"),
  91        NULL
  92};
  93
  94static const char note_template[] =
  95        "\nWrite/edit the notes for the following object:\n";
  96
  97struct msg_arg {
  98        int given;
  99        int use_editor;
 100        struct strbuf buf;
 101};
 102
 103static 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
 111static 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
 123static 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
 155static 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
 228static 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
 242static 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
 259static 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
 283static 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
 290static 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
 314static 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
 328static 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
 358struct 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
 396int 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
 406void finish_copy_notes_for_rewrite(struct notes_rewrite_cfg *c, const char *msg)
 407{
 408        int i;
 409        for (i = 0; c->trees[i]; i++) {
 410                commit_notes(c->trees[i], msg);
 411                free_notes(c->trees[i]);
 412        }
 413        free(c->trees);
 414        free(c);
 415}
 416
 417static 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        const char *msg = "Notes added by 'git notes copy'";
 424
 425        if (rewrite_cmd) {
 426                c = init_copy_notes_for_rewrite(rewrite_cmd);
 427                if (!c)
 428                        return 0;
 429        } else {
 430                init_notes(NULL, NULL, NULL, 0);
 431                t = &default_notes_tree;
 432        }
 433
 434        while (strbuf_getline(&buf, stdin, '\n') != EOF) {
 435                unsigned char from_obj[20], to_obj[20];
 436                struct strbuf **split;
 437                int err;
 438
 439                split = strbuf_split(&buf, ' ');
 440                if (!split[0] || !split[1])
 441                        die(_("Malformed input line: '%s'."), buf.buf);
 442                strbuf_rtrim(split[0]);
 443                strbuf_rtrim(split[1]);
 444                if (get_sha1(split[0]->buf, from_obj))
 445                        die(_("Failed to resolve '%s' as a valid ref."), split[0]->buf);
 446                if (get_sha1(split[1]->buf, to_obj))
 447                        die(_("Failed to resolve '%s' as a valid ref."), split[1]->buf);
 448
 449                if (rewrite_cmd)
 450                        err = copy_note_for_rewrite(c, from_obj, to_obj);
 451                else
 452                        err = copy_note(t, from_obj, to_obj, force,
 453                                        combine_notes_overwrite);
 454
 455                if (err) {
 456                        error(_("Failed to copy notes from '%s' to '%s'"),
 457                              split[0]->buf, split[1]->buf);
 458                        ret = 1;
 459                }
 460
 461                strbuf_list_free(split);
 462        }
 463
 464        if (!rewrite_cmd) {
 465                commit_notes(t, msg);
 466                free_notes(t);
 467        } else {
 468                finish_copy_notes_for_rewrite(c, msg);
 469        }
 470        return ret;
 471}
 472
 473static struct notes_tree *init_notes_check(const char *subcommand)
 474{
 475        struct notes_tree *t;
 476        init_notes(NULL, NULL, NULL, 0);
 477        t = &default_notes_tree;
 478
 479        if (prefixcmp(t->ref, "refs/notes/"))
 480                die("Refusing to %s notes in %s (outside of refs/notes/)",
 481                    subcommand, t->ref);
 482        return t;
 483}
 484
 485static int list(int argc, const char **argv, const char *prefix)
 486{
 487        struct notes_tree *t;
 488        unsigned char object[20];
 489        const unsigned char *note;
 490        int retval = -1;
 491        struct option options[] = {
 492                OPT_END()
 493        };
 494
 495        if (argc)
 496                argc = parse_options(argc, argv, prefix, options,
 497                                     git_notes_list_usage, 0);
 498
 499        if (1 < argc) {
 500                error(_("too many parameters"));
 501                usage_with_options(git_notes_list_usage, options);
 502        }
 503
 504        t = init_notes_check("list");
 505        if (argc) {
 506                if (get_sha1(argv[0], object))
 507                        die(_("Failed to resolve '%s' as a valid ref."), argv[0]);
 508                note = get_note(t, object);
 509                if (note) {
 510                        puts(sha1_to_hex(note));
 511                        retval = 0;
 512                } else
 513                        retval = error(_("No note found for object %s."),
 514                                       sha1_to_hex(object));
 515        } else
 516                retval = for_each_note(t, 0, list_each_note, NULL);
 517
 518        free_notes(t);
 519        return retval;
 520}
 521
 522static int append_edit(int argc, const char **argv, const char *prefix);
 523
 524static int add(int argc, const char **argv, const char *prefix)
 525{
 526        int retval = 0, force = 0;
 527        const char *object_ref;
 528        struct notes_tree *t;
 529        unsigned char object[20], new_note[20];
 530        char logmsg[100];
 531        const unsigned char *note;
 532        struct msg_arg msg = { 0, 0, STRBUF_INIT };
 533        struct option options[] = {
 534                { OPTION_CALLBACK, 'm', "message", &msg, N_("message"),
 535                        N_("note contents as a string"), PARSE_OPT_NONEG,
 536                        parse_msg_arg},
 537                { OPTION_CALLBACK, 'F', "file", &msg, N_("file"),
 538                        N_("note contents in a file"), PARSE_OPT_NONEG,
 539                        parse_file_arg},
 540                { OPTION_CALLBACK, 'c', "reedit-message", &msg, N_("object"),
 541                        N_("reuse and edit specified note object"), PARSE_OPT_NONEG,
 542                        parse_reedit_arg},
 543                { OPTION_CALLBACK, 'C', "reuse-message", &msg, N_("object"),
 544                        N_("reuse specified note object"), PARSE_OPT_NONEG,
 545                        parse_reuse_arg},
 546                OPT__FORCE(&force, N_("replace existing notes")),
 547                OPT_END()
 548        };
 549
 550        argc = parse_options(argc, argv, prefix, options, git_notes_add_usage,
 551                             PARSE_OPT_KEEP_ARGV0);
 552
 553        if (2 < argc) {
 554                error(_("too many parameters"));
 555                usage_with_options(git_notes_add_usage, options);
 556        }
 557
 558        object_ref = argc > 1 ? argv[1] : "HEAD";
 559
 560        if (get_sha1(object_ref, object))
 561                die(_("Failed to resolve '%s' as a valid ref."), object_ref);
 562
 563        t = init_notes_check("add");
 564        note = get_note(t, object);
 565
 566        if (note) {
 567                if (!force) {
 568                        if (!msg.given) {
 569                                /*
 570                                 * Redirect to "edit" subcommand.
 571                                 *
 572                                 * We only end up here if none of -m/-F/-c/-C
 573                                 * or -f are given. The original args are
 574                                 * therefore still in argv[0-1].
 575                                 */
 576                                argv[0] = "edit";
 577                                free_notes(t);
 578                                return append_edit(argc, argv, prefix);
 579                        }
 580                        retval = error(_("Cannot add notes. Found existing notes "
 581                                       "for object %s. Use '-f' to overwrite "
 582                                       "existing notes"), sha1_to_hex(object));
 583                        goto out;
 584                }
 585                fprintf(stderr, _("Overwriting existing notes for object %s\n"),
 586                        sha1_to_hex(object));
 587        }
 588
 589        create_note(object, &msg, 0, note, new_note);
 590
 591        if (is_null_sha1(new_note))
 592                remove_note(t, object);
 593        else if (add_note(t, object, new_note, combine_notes_overwrite))
 594                die("BUG: combine_notes_overwrite failed");
 595
 596        snprintf(logmsg, sizeof(logmsg), "Notes %s by 'git notes %s'",
 597                 is_null_sha1(new_note) ? "removed" : "added", "add");
 598        commit_notes(t, logmsg);
 599out:
 600        free_notes(t);
 601        strbuf_release(&(msg.buf));
 602        return retval;
 603}
 604
 605static int copy(int argc, const char **argv, const char *prefix)
 606{
 607        int retval = 0, force = 0, from_stdin = 0;
 608        const unsigned char *from_note, *note;
 609        const char *object_ref;
 610        unsigned char object[20], from_obj[20];
 611        struct notes_tree *t;
 612        const char *rewrite_cmd = NULL;
 613        struct option options[] = {
 614                OPT__FORCE(&force, N_("replace existing notes")),
 615                OPT_BOOLEAN(0, "stdin", &from_stdin, N_("read objects from stdin")),
 616                OPT_STRING(0, "for-rewrite", &rewrite_cmd, N_("command"),
 617                           N_("load rewriting config for <command> (implies "
 618                              "--stdin)")),
 619                OPT_END()
 620        };
 621
 622        argc = parse_options(argc, argv, prefix, options, git_notes_copy_usage,
 623                             0);
 624
 625        if (from_stdin || rewrite_cmd) {
 626                if (argc) {
 627                        error(_("too many parameters"));
 628                        usage_with_options(git_notes_copy_usage, options);
 629                } else {
 630                        return notes_copy_from_stdin(force, rewrite_cmd);
 631                }
 632        }
 633
 634        if (argc < 2) {
 635                error(_("too few parameters"));
 636                usage_with_options(git_notes_copy_usage, options);
 637        }
 638        if (2 < argc) {
 639                error(_("too many parameters"));
 640                usage_with_options(git_notes_copy_usage, options);
 641        }
 642
 643        if (get_sha1(argv[0], from_obj))
 644                die(_("Failed to resolve '%s' as a valid ref."), argv[0]);
 645
 646        object_ref = 1 < argc ? argv[1] : "HEAD";
 647
 648        if (get_sha1(object_ref, object))
 649                die(_("Failed to resolve '%s' as a valid ref."), object_ref);
 650
 651        t = init_notes_check("copy");
 652        note = get_note(t, object);
 653
 654        if (note) {
 655                if (!force) {
 656                        retval = error(_("Cannot copy notes. Found existing "
 657                                       "notes for object %s. Use '-f' to "
 658                                       "overwrite existing notes"),
 659                                       sha1_to_hex(object));
 660                        goto out;
 661                }
 662                fprintf(stderr, _("Overwriting existing notes for object %s\n"),
 663                        sha1_to_hex(object));
 664        }
 665
 666        from_note = get_note(t, from_obj);
 667        if (!from_note) {
 668                retval = error(_("Missing notes on source object %s. Cannot "
 669                               "copy."), sha1_to_hex(from_obj));
 670                goto out;
 671        }
 672
 673        if (add_note(t, object, from_note, combine_notes_overwrite))
 674                die("BUG: combine_notes_overwrite failed");
 675        commit_notes(t, "Notes added by 'git notes copy'");
 676out:
 677        free_notes(t);
 678        return retval;
 679}
 680
 681static int append_edit(int argc, const char **argv, const char *prefix)
 682{
 683        const char *object_ref;
 684        struct notes_tree *t;
 685        unsigned char object[20], new_note[20];
 686        const unsigned char *note;
 687        char logmsg[100];
 688        const char * const *usage;
 689        struct msg_arg msg = { 0, 0, STRBUF_INIT };
 690        struct option options[] = {
 691                { OPTION_CALLBACK, 'm', "message", &msg, N_("message"),
 692                        N_("note contents as a string"), PARSE_OPT_NONEG,
 693                        parse_msg_arg},
 694                { OPTION_CALLBACK, 'F', "file", &msg, N_("file"),
 695                        N_("note contents in a file"), PARSE_OPT_NONEG,
 696                        parse_file_arg},
 697                { OPTION_CALLBACK, 'c', "reedit-message", &msg, N_("object"),
 698                        N_("reuse and edit specified note object"), PARSE_OPT_NONEG,
 699                        parse_reedit_arg},
 700                { OPTION_CALLBACK, 'C', "reuse-message", &msg, N_("object"),
 701                        N_("reuse specified note object"), PARSE_OPT_NONEG,
 702                        parse_reuse_arg},
 703                OPT_END()
 704        };
 705        int edit = !strcmp(argv[0], "edit");
 706
 707        usage = edit ? git_notes_edit_usage : git_notes_append_usage;
 708        argc = parse_options(argc, argv, prefix, options, usage,
 709                             PARSE_OPT_KEEP_ARGV0);
 710
 711        if (2 < argc) {
 712                error(_("too many parameters"));
 713                usage_with_options(usage, options);
 714        }
 715
 716        if (msg.given && edit)
 717                fprintf(stderr, _("The -m/-F/-c/-C options have been deprecated "
 718                        "for the 'edit' subcommand.\n"
 719                        "Please use 'git notes add -f -m/-F/-c/-C' instead.\n"));
 720
 721        object_ref = 1 < argc ? argv[1] : "HEAD";
 722
 723        if (get_sha1(object_ref, object))
 724                die(_("Failed to resolve '%s' as a valid ref."), object_ref);
 725
 726        t = init_notes_check(argv[0]);
 727        note = get_note(t, object);
 728
 729        create_note(object, &msg, !edit, note, new_note);
 730
 731        if (is_null_sha1(new_note))
 732                remove_note(t, object);
 733        else if (add_note(t, object, new_note, combine_notes_overwrite))
 734                die("BUG: combine_notes_overwrite failed");
 735
 736        snprintf(logmsg, sizeof(logmsg), "Notes %s by 'git notes %s'",
 737                 is_null_sha1(new_note) ? "removed" : "added", argv[0]);
 738        commit_notes(t, logmsg);
 739        free_notes(t);
 740        strbuf_release(&(msg.buf));
 741        return 0;
 742}
 743
 744static int show(int argc, const char **argv, const char *prefix)
 745{
 746        const char *object_ref;
 747        struct notes_tree *t;
 748        unsigned char object[20];
 749        const unsigned char *note;
 750        int retval;
 751        struct option options[] = {
 752                OPT_END()
 753        };
 754
 755        argc = parse_options(argc, argv, prefix, options, git_notes_show_usage,
 756                             0);
 757
 758        if (1 < argc) {
 759                error(_("too many parameters"));
 760                usage_with_options(git_notes_show_usage, options);
 761        }
 762
 763        object_ref = argc ? argv[0] : "HEAD";
 764
 765        if (get_sha1(object_ref, object))
 766                die(_("Failed to resolve '%s' as a valid ref."), object_ref);
 767
 768        t = init_notes_check("show");
 769        note = get_note(t, object);
 770
 771        if (!note)
 772                retval = error(_("No note found for object %s."),
 773                               sha1_to_hex(object));
 774        else {
 775                const char *show_args[3] = {"show", sha1_to_hex(note), NULL};
 776                retval = execv_git_cmd(show_args);
 777        }
 778        free_notes(t);
 779        return retval;
 780}
 781
 782static int merge_abort(struct notes_merge_options *o)
 783{
 784        int ret = 0;
 785
 786        /*
 787         * Remove .git/NOTES_MERGE_PARTIAL and .git/NOTES_MERGE_REF, and call
 788         * notes_merge_abort() to remove .git/NOTES_MERGE_WORKTREE.
 789         */
 790
 791        if (delete_ref("NOTES_MERGE_PARTIAL", NULL, 0))
 792                ret += error("Failed to delete ref NOTES_MERGE_PARTIAL");
 793        if (delete_ref("NOTES_MERGE_REF", NULL, REF_NODEREF))
 794                ret += error("Failed to delete ref NOTES_MERGE_REF");
 795        if (notes_merge_abort(o))
 796                ret += error("Failed to remove 'git notes merge' worktree");
 797        return ret;
 798}
 799
 800static int merge_commit(struct notes_merge_options *o)
 801{
 802        struct strbuf msg = STRBUF_INIT;
 803        unsigned char sha1[20], parent_sha1[20];
 804        struct notes_tree *t;
 805        struct commit *partial;
 806        struct pretty_print_context pretty_ctx;
 807        void *local_ref_to_free;
 808        int ret;
 809
 810        /*
 811         * Read partial merge result from .git/NOTES_MERGE_PARTIAL,
 812         * and target notes ref from .git/NOTES_MERGE_REF.
 813         */
 814
 815        if (get_sha1("NOTES_MERGE_PARTIAL", sha1))
 816                die("Failed to read ref NOTES_MERGE_PARTIAL");
 817        else if (!(partial = lookup_commit_reference(sha1)))
 818                die("Could not find commit from NOTES_MERGE_PARTIAL.");
 819        else if (parse_commit(partial))
 820                die("Could not parse commit from NOTES_MERGE_PARTIAL.");
 821
 822        if (partial->parents)
 823                hashcpy(parent_sha1, partial->parents->item->object.sha1);
 824        else
 825                hashclr(parent_sha1);
 826
 827        t = xcalloc(1, sizeof(struct notes_tree));
 828        init_notes(t, "NOTES_MERGE_PARTIAL", combine_notes_overwrite, 0);
 829
 830        o->local_ref = local_ref_to_free =
 831                resolve_refdup("NOTES_MERGE_REF", sha1, 0, NULL);
 832        if (!o->local_ref)
 833                die("Failed to resolve NOTES_MERGE_REF");
 834
 835        if (notes_merge_commit(o, t, partial, sha1))
 836                die("Failed to finalize notes merge");
 837
 838        /* Reuse existing commit message in reflog message */
 839        memset(&pretty_ctx, 0, sizeof(pretty_ctx));
 840        format_commit_message(partial, "%s", &msg, &pretty_ctx);
 841        strbuf_trim(&msg);
 842        strbuf_insert(&msg, 0, "notes: ", 7);
 843        update_ref(msg.buf, o->local_ref, sha1,
 844                   is_null_sha1(parent_sha1) ? NULL : parent_sha1,
 845                   0, DIE_ON_ERR);
 846
 847        free_notes(t);
 848        strbuf_release(&msg);
 849        ret = merge_abort(o);
 850        free(local_ref_to_free);
 851        return ret;
 852}
 853
 854static int merge(int argc, const char **argv, const char *prefix)
 855{
 856        struct strbuf remote_ref = STRBUF_INIT, msg = STRBUF_INIT;
 857        unsigned char result_sha1[20];
 858        struct notes_tree *t;
 859        struct notes_merge_options o;
 860        int do_merge = 0, do_commit = 0, do_abort = 0;
 861        int verbosity = 0, result;
 862        const char *strategy = NULL;
 863        struct option options[] = {
 864                OPT_GROUP(N_("General options")),
 865                OPT__VERBOSITY(&verbosity),
 866                OPT_GROUP(N_("Merge options")),
 867                OPT_STRING('s', "strategy", &strategy, N_("strategy"),
 868                           N_("resolve notes conflicts using the given strategy "
 869                              "(manual/ours/theirs/union/cat_sort_uniq)")),
 870                OPT_GROUP(N_("Committing unmerged notes")),
 871                { OPTION_BOOLEAN, 0, "commit", &do_commit, NULL,
 872                        N_("finalize notes merge by committing unmerged notes"),
 873                        PARSE_OPT_NOARG | PARSE_OPT_NONEG },
 874                OPT_GROUP(N_("Aborting notes merge resolution")),
 875                { OPTION_BOOLEAN, 0, "abort", &do_abort, NULL,
 876                        N_("abort notes merge"),
 877                        PARSE_OPT_NOARG | PARSE_OPT_NONEG },
 878                OPT_END()
 879        };
 880
 881        argc = parse_options(argc, argv, prefix, options,
 882                             git_notes_merge_usage, 0);
 883
 884        if (strategy || do_commit + do_abort == 0)
 885                do_merge = 1;
 886        if (do_merge + do_commit + do_abort != 1) {
 887                error("cannot mix --commit, --abort or -s/--strategy");
 888                usage_with_options(git_notes_merge_usage, options);
 889        }
 890
 891        if (do_merge && argc != 1) {
 892                error("Must specify a notes ref to merge");
 893                usage_with_options(git_notes_merge_usage, options);
 894        } else if (!do_merge && argc) {
 895                error("too many parameters");
 896                usage_with_options(git_notes_merge_usage, options);
 897        }
 898
 899        init_notes_merge_options(&o);
 900        o.verbosity = verbosity + NOTES_MERGE_VERBOSITY_DEFAULT;
 901
 902        if (do_abort)
 903                return merge_abort(&o);
 904        if (do_commit)
 905                return merge_commit(&o);
 906
 907        o.local_ref = default_notes_ref();
 908        strbuf_addstr(&remote_ref, argv[0]);
 909        expand_notes_ref(&remote_ref);
 910        o.remote_ref = remote_ref.buf;
 911
 912        if (strategy) {
 913                if (!strcmp(strategy, "manual"))
 914                        o.strategy = NOTES_MERGE_RESOLVE_MANUAL;
 915                else if (!strcmp(strategy, "ours"))
 916                        o.strategy = NOTES_MERGE_RESOLVE_OURS;
 917                else if (!strcmp(strategy, "theirs"))
 918                        o.strategy = NOTES_MERGE_RESOLVE_THEIRS;
 919                else if (!strcmp(strategy, "union"))
 920                        o.strategy = NOTES_MERGE_RESOLVE_UNION;
 921                else if (!strcmp(strategy, "cat_sort_uniq"))
 922                        o.strategy = NOTES_MERGE_RESOLVE_CAT_SORT_UNIQ;
 923                else {
 924                        error("Unknown -s/--strategy: %s", strategy);
 925                        usage_with_options(git_notes_merge_usage, options);
 926                }
 927        }
 928
 929        t = init_notes_check("merge");
 930
 931        strbuf_addf(&msg, "notes: Merged notes from %s into %s",
 932                    remote_ref.buf, default_notes_ref());
 933        strbuf_add(&(o.commit_msg), msg.buf + 7, msg.len - 7); /* skip "notes: " */
 934
 935        result = notes_merge(&o, t, result_sha1);
 936
 937        if (result >= 0) /* Merge resulted (trivially) in result_sha1 */
 938                /* Update default notes ref with new commit */
 939                update_ref(msg.buf, default_notes_ref(), result_sha1, NULL,
 940                           0, DIE_ON_ERR);
 941        else { /* Merge has unresolved conflicts */
 942                /* Update .git/NOTES_MERGE_PARTIAL with partial merge result */
 943                update_ref(msg.buf, "NOTES_MERGE_PARTIAL", result_sha1, NULL,
 944                           0, DIE_ON_ERR);
 945                /* Store ref-to-be-updated into .git/NOTES_MERGE_REF */
 946                if (create_symref("NOTES_MERGE_REF", default_notes_ref(), NULL))
 947                        die("Failed to store link to current notes ref (%s)",
 948                            default_notes_ref());
 949                printf("Automatic notes merge failed. Fix conflicts in %s and "
 950                       "commit the result with 'git notes merge --commit', or "
 951                       "abort the merge with 'git notes merge --abort'.\n",
 952                       git_path(NOTES_MERGE_WORKTREE));
 953        }
 954
 955        free_notes(t);
 956        strbuf_release(&remote_ref);
 957        strbuf_release(&msg);
 958        return result < 0; /* return non-zero on conflicts */
 959}
 960
 961#define IGNORE_MISSING 1
 962
 963static int remove_one_note(struct notes_tree *t, const char *name, unsigned flag)
 964{
 965        int status;
 966        unsigned char sha1[20];
 967        if (get_sha1(name, sha1))
 968                return error(_("Failed to resolve '%s' as a valid ref."), name);
 969        status = remove_note(t, sha1);
 970        if (status)
 971                fprintf(stderr, _("Object %s has no note\n"), name);
 972        else
 973                fprintf(stderr, _("Removing note for object %s\n"), name);
 974        return (flag & IGNORE_MISSING) ? 0 : status;
 975}
 976
 977static int remove_cmd(int argc, const char **argv, const char *prefix)
 978{
 979        unsigned flag = 0;
 980        int from_stdin = 0;
 981        struct option options[] = {
 982                OPT_BIT(0, "ignore-missing", &flag,
 983                        N_("attempt to remove non-existent note is not an error"),
 984                        IGNORE_MISSING),
 985                OPT_BOOLEAN(0, "stdin", &from_stdin,
 986                            N_("read object names from the standard input")),
 987                OPT_END()
 988        };
 989        struct notes_tree *t;
 990        int retval = 0;
 991
 992        argc = parse_options(argc, argv, prefix, options,
 993                             git_notes_remove_usage, 0);
 994
 995        t = init_notes_check("remove");
 996
 997        if (!argc && !from_stdin) {
 998                retval = remove_one_note(t, "HEAD", flag);
 999        } else {
1000                while (*argv) {
1001                        retval |= remove_one_note(t, *argv, flag);
1002                        argv++;
1003                }
1004        }
1005        if (from_stdin) {
1006                struct strbuf sb = STRBUF_INIT;
1007                while (strbuf_getwholeline(&sb, stdin, '\n') != EOF) {
1008                        strbuf_rtrim(&sb);
1009                        retval |= remove_one_note(t, sb.buf, flag);
1010                }
1011                strbuf_release(&sb);
1012        }
1013        if (!retval)
1014                commit_notes(t, "Notes removed by 'git notes remove'");
1015        free_notes(t);
1016        return retval;
1017}
1018
1019static int prune(int argc, const char **argv, const char *prefix)
1020{
1021        struct notes_tree *t;
1022        int show_only = 0, verbose = 0;
1023        struct option options[] = {
1024                OPT__DRY_RUN(&show_only, "do not remove, show only"),
1025                OPT__VERBOSE(&verbose, "report pruned notes"),
1026                OPT_END()
1027        };
1028
1029        argc = parse_options(argc, argv, prefix, options, git_notes_prune_usage,
1030                             0);
1031
1032        if (argc) {
1033                error(_("too many parameters"));
1034                usage_with_options(git_notes_prune_usage, options);
1035        }
1036
1037        t = init_notes_check("prune");
1038
1039        prune_notes(t, (verbose ? NOTES_PRUNE_VERBOSE : 0) |
1040                (show_only ? NOTES_PRUNE_VERBOSE|NOTES_PRUNE_DRYRUN : 0) );
1041        if (!show_only)
1042                commit_notes(t, "Notes removed by 'git notes prune'");
1043        free_notes(t);
1044        return 0;
1045}
1046
1047static int get_ref(int argc, const char **argv, const char *prefix)
1048{
1049        struct option options[] = { OPT_END() };
1050        argc = parse_options(argc, argv, prefix, options,
1051                             git_notes_get_ref_usage, 0);
1052
1053        if (argc) {
1054                error("too many parameters");
1055                usage_with_options(git_notes_get_ref_usage, options);
1056        }
1057
1058        puts(default_notes_ref());
1059        return 0;
1060}
1061
1062int cmd_notes(int argc, const char **argv, const char *prefix)
1063{
1064        int result;
1065        const char *override_notes_ref = NULL;
1066        struct option options[] = {
1067                OPT_STRING(0, "ref", &override_notes_ref, N_("notes_ref"),
1068                           N_("use notes from <notes_ref>")),
1069                OPT_END()
1070        };
1071
1072        git_config(git_default_config, NULL);
1073        argc = parse_options(argc, argv, prefix, options, git_notes_usage,
1074                             PARSE_OPT_STOP_AT_NON_OPTION);
1075
1076        if (override_notes_ref) {
1077                struct strbuf sb = STRBUF_INIT;
1078                strbuf_addstr(&sb, override_notes_ref);
1079                expand_notes_ref(&sb);
1080                setenv("GIT_NOTES_REF", sb.buf, 1);
1081                strbuf_release(&sb);
1082        }
1083
1084        if (argc < 1 || !strcmp(argv[0], "list"))
1085                result = list(argc, argv, prefix);
1086        else if (!strcmp(argv[0], "add"))
1087                result = add(argc, argv, prefix);
1088        else if (!strcmp(argv[0], "copy"))
1089                result = copy(argc, argv, prefix);
1090        else if (!strcmp(argv[0], "append") || !strcmp(argv[0], "edit"))
1091                result = append_edit(argc, argv, prefix);
1092        else if (!strcmp(argv[0], "show"))
1093                result = show(argc, argv, prefix);
1094        else if (!strcmp(argv[0], "merge"))
1095                result = merge(argc, argv, prefix);
1096        else if (!strcmp(argv[0], "remove"))
1097                result = remove_cmd(argc, argv, prefix);
1098        else if (!strcmp(argv[0], "prune"))
1099                result = prune(argc, argv, prefix);
1100        else if (!strcmp(argv[0], "get-ref"))
1101                result = get_ref(argc, argv, prefix);
1102        else {
1103                result = error(_("Unknown subcommand: %s"), argv[0]);
1104                usage_with_options(git_notes_usage, options);
1105        }
1106
1107        return result ? 1 : 0;
1108}