Andrew's git / gitweb.git / builtin/notes.c
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builtin / notes.con commit Merge branch 'jk/pager-with-external-command' (67c116b)
   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 const char * const git_notes_usage[] = {
  23        "git notes [--ref <notes_ref>] [list [<object>]]",
  24        "git notes [--ref <notes_ref>] add [-f] [-m <msg> | -F <file> | (-c | -C) <object>] [<object>]",
  25        "git notes [--ref <notes_ref>] copy [-f] <from-object> <to-object>",
  26        "git notes [--ref <notes_ref>] append [-m <msg> | -F <file> | (-c | -C) <object>] [<object>]",
  27        "git notes [--ref <notes_ref>] edit [<object>]",
  28        "git notes [--ref <notes_ref>] show [<object>]",
  29        "git notes [--ref <notes_ref>] merge [-v | -q] [-s <strategy> ] <notes_ref>",
  30        "git notes merge --commit [-v | -q]",
  31        "git notes merge --abort [-v | -q]",
  32        "git notes [--ref <notes_ref>] remove [<object>...]",
  33        "git notes [--ref <notes_ref>] prune [-n | -v]",
  34        "git notes [--ref <notes_ref>] get-ref",
  35        NULL
  36};
  37
  38static const char * const git_notes_list_usage[] = {
  39        "git notes [list [<object>]]",
  40        NULL
  41};
  42
  43static const char * const git_notes_add_usage[] = {
  44        "git notes add [<options>] [<object>]",
  45        NULL
  46};
  47
  48static const char * const git_notes_copy_usage[] = {
  49        "git notes copy [<options>] <from-object> <to-object>",
  50        "git notes copy --stdin [<from-object> <to-object>]...",
  51        NULL
  52};
  53
  54static const char * const git_notes_append_usage[] = {
  55        "git notes append [<options>] [<object>]",
  56        NULL
  57};
  58
  59static const char * const git_notes_edit_usage[] = {
  60        "git notes edit [<object>]",
  61        NULL
  62};
  63
  64static const char * const git_notes_show_usage[] = {
  65        "git notes show [<object>]",
  66        NULL
  67};
  68
  69static const char * const git_notes_merge_usage[] = {
  70        "git notes merge [<options>] <notes_ref>",
  71        "git notes merge --commit [<options>]",
  72        "git notes merge --abort [<options>]",
  73        NULL
  74};
  75
  76static const char * const git_notes_remove_usage[] = {
  77        "git notes remove [<object>]",
  78        NULL
  79};
  80
  81static const char * const git_notes_prune_usage[] = {
  82        "git notes prune [<options>]",
  83        NULL
  84};
  85
  86static const char * const git_notes_get_ref_usage[] = {
  87        "git notes get-ref",
  88        NULL
  89};
  90
  91static const char note_template[] =
  92        "\n"
  93        "#\n"
  94        "# Write/edit the notes for the following object:\n"
  95        "#\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        FILE *show_out;
 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        /* Open the output as FILE* so strbuf_getline() can be used. */
 143        show_out = xfdopen(show.out, "r");
 144        if (show_out == NULL)
 145                die_errno(_("can't fdopen 'show' output fd"));
 146
 147        /* Prepend "# " to each output line and write result to 'fd' */
 148        while (strbuf_getline(&buf, show_out, '\n') != EOF) {
 149                write_or_die(fd, "# ", 2);
 150                write_or_die(fd, buf.buf, buf.len);
 151                write_or_die(fd, "\n", 1);
 152        }
 153        strbuf_release(&buf);
 154        if (fclose(show_out))
 155                die_errno(_("failed to close pipe to 'show' for object '%s'"),
 156                          sha1_to_hex(object));
 157        if (finish_command(&show))
 158                die(_("failed to finish 'show' for object '%s'"),
 159                    sha1_to_hex(object));
 160}
 161
 162static void create_note(const unsigned char *object, struct msg_arg *msg,
 163                        int append_only, const unsigned char *prev,
 164                        unsigned char *result)
 165{
 166        char *path = NULL;
 167
 168        if (msg->use_editor || !msg->given) {
 169                int fd;
 170
 171                /* write the template message before editing: */
 172                path = git_pathdup("NOTES_EDITMSG");
 173                fd = open(path, O_CREAT | O_TRUNC | O_WRONLY, 0600);
 174                if (fd < 0)
 175                        die_errno(_("could not create file '%s'"), path);
 176
 177                if (msg->given)
 178                        write_or_die(fd, msg->buf.buf, msg->buf.len);
 179                else if (prev && !append_only)
 180                        write_note_data(fd, prev);
 181                write_or_die(fd, note_template, strlen(note_template));
 182
 183                write_commented_object(fd, object);
 184
 185                close(fd);
 186                strbuf_reset(&(msg->buf));
 187
 188                if (launch_editor(path, &(msg->buf), NULL)) {
 189                        die(_("Please supply the note contents using either -m" \
 190                            " or -F option"));
 191                }
 192                stripspace(&(msg->buf), 1);
 193        }
 194
 195        if (prev && append_only) {
 196                /* Append buf to previous note contents */
 197                unsigned long size;
 198                enum object_type type;
 199                char *prev_buf = read_sha1_file(prev, &type, &size);
 200
 201                strbuf_grow(&(msg->buf), size + 1);
 202                if (msg->buf.len && prev_buf && size)
 203                        strbuf_insert(&(msg->buf), 0, "\n", 1);
 204                if (prev_buf && size)
 205                        strbuf_insert(&(msg->buf), 0, prev_buf, size);
 206                free(prev_buf);
 207        }
 208
 209        if (!msg->buf.len) {
 210                fprintf(stderr, _("Removing note for object %s\n"),
 211                        sha1_to_hex(object));
 212                hashclr(result);
 213        } else {
 214                if (write_sha1_file(msg->buf.buf, msg->buf.len, blob_type, result)) {
 215                        error(_("unable to write note object"));
 216                        if (path)
 217                                error(_("The note contents has been left in %s"),
 218                                      path);
 219                        exit(128);
 220                }
 221        }
 222
 223        if (path) {
 224                unlink_or_warn(path);
 225                free(path);
 226        }
 227}
 228
 229static int parse_msg_arg(const struct option *opt, const char *arg, int unset)
 230{
 231        struct msg_arg *msg = opt->value;
 232
 233        strbuf_grow(&(msg->buf), strlen(arg) + 2);
 234        if (msg->buf.len)
 235                strbuf_addch(&(msg->buf), '\n');
 236        strbuf_addstr(&(msg->buf), arg);
 237        stripspace(&(msg->buf), 0);
 238
 239        msg->given = 1;
 240        return 0;
 241}
 242
 243static int parse_file_arg(const struct option *opt, const char *arg, int unset)
 244{
 245        struct msg_arg *msg = opt->value;
 246
 247        if (msg->buf.len)
 248                strbuf_addch(&(msg->buf), '\n');
 249        if (!strcmp(arg, "-")) {
 250                if (strbuf_read(&(msg->buf), 0, 1024) < 0)
 251                        die_errno(_("cannot read '%s'"), arg);
 252        } else if (strbuf_read_file(&(msg->buf), arg, 1024) < 0)
 253                die_errno(_("could not open or read '%s'"), arg);
 254        stripspace(&(msg->buf), 0);
 255
 256        msg->given = 1;
 257        return 0;
 258}
 259
 260static int parse_reuse_arg(const struct option *opt, const char *arg, int unset)
 261{
 262        struct msg_arg *msg = opt->value;
 263        char *buf;
 264        unsigned char object[20];
 265        enum object_type type;
 266        unsigned long len;
 267
 268        if (msg->buf.len)
 269                strbuf_addch(&(msg->buf), '\n');
 270
 271        if (get_sha1(arg, object))
 272                die(_("Failed to resolve '%s' as a valid ref."), arg);
 273        if (!(buf = read_sha1_file(object, &type, &len)) || !len) {
 274                free(buf);
 275                die(_("Failed to read object '%s'."), arg);;
 276        }
 277        strbuf_add(&(msg->buf), buf, len);
 278        free(buf);
 279
 280        msg->given = 1;
 281        return 0;
 282}
 283
 284static int parse_reedit_arg(const struct option *opt, const char *arg, int unset)
 285{
 286        struct msg_arg *msg = opt->value;
 287        msg->use_editor = 1;
 288        return parse_reuse_arg(opt, arg, unset);
 289}
 290
 291void commit_notes(struct notes_tree *t, const char *msg)
 292{
 293        struct strbuf buf = STRBUF_INIT;
 294        unsigned char commit_sha1[20];
 295
 296        if (!t)
 297                t = &default_notes_tree;
 298        if (!t->initialized || !t->ref || !*t->ref)
 299                die(_("Cannot commit uninitialized/unreferenced notes tree"));
 300        if (!t->dirty)
 301                return; /* don't have to commit an unchanged tree */
 302
 303        /* Prepare commit message and reflog message */
 304        strbuf_addstr(&buf, "notes: "); /* commit message starts at index 7 */
 305        strbuf_addstr(&buf, msg);
 306        if (buf.buf[buf.len - 1] != '\n')
 307                strbuf_addch(&buf, '\n'); /* Make sure msg ends with newline */
 308
 309        create_notes_commit(t, NULL, buf.buf + 7, commit_sha1);
 310        update_ref(buf.buf, t->ref, commit_sha1, NULL, 0, DIE_ON_ERR);
 311
 312        strbuf_release(&buf);
 313}
 314
 315combine_notes_fn parse_combine_notes_fn(const char *v)
 316{
 317        if (!strcasecmp(v, "overwrite"))
 318                return combine_notes_overwrite;
 319        else if (!strcasecmp(v, "ignore"))
 320                return combine_notes_ignore;
 321        else if (!strcasecmp(v, "concatenate"))
 322                return combine_notes_concatenate;
 323        else if (!strcasecmp(v, "cat_sort_uniq"))
 324                return combine_notes_cat_sort_uniq;
 325        else
 326                return NULL;
 327}
 328
 329static int notes_rewrite_config(const char *k, const char *v, void *cb)
 330{
 331        struct notes_rewrite_cfg *c = cb;
 332        if (!prefixcmp(k, "notes.rewrite.") && !strcmp(k+14, c->cmd)) {
 333                c->enabled = git_config_bool(k, v);
 334                return 0;
 335        } else if (!c->mode_from_env && !strcmp(k, "notes.rewritemode")) {
 336                if (!v)
 337                        config_error_nonbool(k);
 338                c->combine = parse_combine_notes_fn(v);
 339                if (!c->combine) {
 340                        error(_("Bad notes.rewriteMode value: '%s'"), v);
 341                        return 1;
 342                }
 343                return 0;
 344        } else if (!c->refs_from_env && !strcmp(k, "notes.rewriteref")) {
 345                /* note that a refs/ prefix is implied in the
 346                 * underlying for_each_glob_ref */
 347                if (!prefixcmp(v, "refs/notes/"))
 348                        string_list_add_refs_by_glob(c->refs, v);
 349                else
 350                        warning(_("Refusing to rewrite notes in %s"
 351                                " (outside of refs/notes/)"), v);
 352                return 0;
 353        }
 354
 355        return 0;
 356}
 357
 358
 359struct notes_rewrite_cfg *init_copy_notes_for_rewrite(const char *cmd)
 360{
 361        struct notes_rewrite_cfg *c = xmalloc(sizeof(struct notes_rewrite_cfg));
 362        const char *rewrite_mode_env = getenv(GIT_NOTES_REWRITE_MODE_ENVIRONMENT);
 363        const char *rewrite_refs_env = getenv(GIT_NOTES_REWRITE_REF_ENVIRONMENT);
 364        c->cmd = cmd;
 365        c->enabled = 1;
 366        c->combine = combine_notes_concatenate;
 367        c->refs = xcalloc(1, sizeof(struct string_list));
 368        c->refs->strdup_strings = 1;
 369        c->refs_from_env = 0;
 370        c->mode_from_env = 0;
 371        if (rewrite_mode_env) {
 372                c->mode_from_env = 1;
 373                c->combine = parse_combine_notes_fn(rewrite_mode_env);
 374                if (!c->combine)
 375                        /* TRANSLATORS: The first %s is the name of the
 376                           environment variable, the second %s is its value */
 377                        error(_("Bad %s value: '%s'"), GIT_NOTES_REWRITE_MODE_ENVIRONMENT,
 378                                        rewrite_mode_env);
 379        }
 380        if (rewrite_refs_env) {
 381                c->refs_from_env = 1;
 382                string_list_add_refs_from_colon_sep(c->refs, rewrite_refs_env);
 383        }
 384        git_config(notes_rewrite_config, c);
 385        if (!c->enabled || !c->refs->nr) {
 386                string_list_clear(c->refs, 0);
 387                free(c->refs);
 388                free(c);
 389                return NULL;
 390        }
 391        c->trees = load_notes_trees(c->refs);
 392        string_list_clear(c->refs, 0);
 393        free(c->refs);
 394        return c;
 395}
 396
 397int copy_note_for_rewrite(struct notes_rewrite_cfg *c,
 398                          const unsigned char *from_obj, const unsigned char *to_obj)
 399{
 400        int ret = 0;
 401        int i;
 402        for (i = 0; c->trees[i]; i++)
 403                ret = copy_note(c->trees[i], from_obj, to_obj, 1, c->combine) || ret;
 404        return ret;
 405}
 406
 407void finish_copy_notes_for_rewrite(struct notes_rewrite_cfg *c)
 408{
 409        int i;
 410        for (i = 0; c->trees[i]; i++) {
 411                commit_notes(c->trees[i], "Notes added by 'git notes copy'");
 412                free_notes(c->trees[i]);
 413        }
 414        free(c->trees);
 415        free(c);
 416}
 417
 418static int notes_copy_from_stdin(int force, const char *rewrite_cmd)
 419{
 420        struct strbuf buf = STRBUF_INIT;
 421        struct notes_rewrite_cfg *c = NULL;
 422        struct notes_tree *t = NULL;
 423        int ret = 0;
 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, "Notes added by 'git notes copy'");
 466                free_notes(t);
 467        } else {
 468                finish_copy_notes_for_rewrite(c);
 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, "msg",
 535                        "note contents as a string", PARSE_OPT_NONEG,
 536                        parse_msg_arg},
 537                { OPTION_CALLBACK, 'F', "file", &msg, "file",
 538                        "note contents in a file", PARSE_OPT_NONEG,
 539                        parse_file_arg},
 540                { OPTION_CALLBACK, 'c', "reedit-message", &msg, "object",
 541                        "reuse and edit specified note object", PARSE_OPT_NONEG,
 542                        parse_reedit_arg},
 543                { OPTION_CALLBACK, 'C', "reuse-message", &msg, "object",
 544                        "reuse specified note object", PARSE_OPT_NONEG,
 545                        parse_reuse_arg},
 546                OPT__FORCE(&force, "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, "replace existing notes"),
 615                OPT_BOOLEAN(0, "stdin", &from_stdin, "read objects from stdin"),
 616                OPT_STRING(0, "for-rewrite", &rewrite_cmd, "command",
 617                           "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, "msg",
 692                        "note contents as a string", PARSE_OPT_NONEG,
 693                        parse_msg_arg},
 694                { OPTION_CALLBACK, 'F', "file", &msg, "file",
 695                        "note contents in a file", PARSE_OPT_NONEG,
 696                        parse_file_arg},
 697                { OPTION_CALLBACK, 'c', "reedit-message", &msg, "object",
 698                        "reuse and edit specified note object", PARSE_OPT_NONEG,
 699                        parse_reedit_arg},
 700                { OPTION_CALLBACK, 'C', "reuse-message", &msg, "object",
 701                        "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
 808        /*
 809         * Read partial merge result from .git/NOTES_MERGE_PARTIAL,
 810         * and target notes ref from .git/NOTES_MERGE_REF.
 811         */
 812
 813        if (get_sha1("NOTES_MERGE_PARTIAL", sha1))
 814                die("Failed to read ref NOTES_MERGE_PARTIAL");
 815        else if (!(partial = lookup_commit_reference(sha1)))
 816                die("Could not find commit from NOTES_MERGE_PARTIAL.");
 817        else if (parse_commit(partial))
 818                die("Could not parse commit from NOTES_MERGE_PARTIAL.");
 819
 820        if (partial->parents)
 821                hashcpy(parent_sha1, partial->parents->item->object.sha1);
 822        else
 823                hashclr(parent_sha1);
 824
 825        t = xcalloc(1, sizeof(struct notes_tree));
 826        init_notes(t, "NOTES_MERGE_PARTIAL", combine_notes_overwrite, 0);
 827
 828        o->local_ref = resolve_ref("NOTES_MERGE_REF", sha1, 0, NULL);
 829        if (!o->local_ref)
 830                die("Failed to resolve NOTES_MERGE_REF");
 831
 832        if (notes_merge_commit(o, t, partial, sha1))
 833                die("Failed to finalize notes merge");
 834
 835        /* Reuse existing commit message in reflog message */
 836        memset(&pretty_ctx, 0, sizeof(pretty_ctx));
 837        format_commit_message(partial, "%s", &msg, &pretty_ctx);
 838        strbuf_trim(&msg);
 839        strbuf_insert(&msg, 0, "notes: ", 7);
 840        update_ref(msg.buf, o->local_ref, sha1,
 841                   is_null_sha1(parent_sha1) ? NULL : parent_sha1,
 842                   0, DIE_ON_ERR);
 843
 844        free_notes(t);
 845        strbuf_release(&msg);
 846        return merge_abort(o);
 847}
 848
 849static int merge(int argc, const char **argv, const char *prefix)
 850{
 851        struct strbuf remote_ref = STRBUF_INIT, msg = STRBUF_INIT;
 852        unsigned char result_sha1[20];
 853        struct notes_tree *t;
 854        struct notes_merge_options o;
 855        int do_merge = 0, do_commit = 0, do_abort = 0;
 856        int verbosity = 0, result;
 857        const char *strategy = NULL;
 858        struct option options[] = {
 859                OPT_GROUP("General options"),
 860                OPT__VERBOSITY(&verbosity),
 861                OPT_GROUP("Merge options"),
 862                OPT_STRING('s', "strategy", &strategy, "strategy",
 863                           "resolve notes conflicts using the given strategy "
 864                           "(manual/ours/theirs/union/cat_sort_uniq)"),
 865                OPT_GROUP("Committing unmerged notes"),
 866                { OPTION_BOOLEAN, 0, "commit", &do_commit, NULL,
 867                        "finalize notes merge by committing unmerged notes",
 868                        PARSE_OPT_NOARG | PARSE_OPT_NONEG },
 869                OPT_GROUP("Aborting notes merge resolution"),
 870                { OPTION_BOOLEAN, 0, "abort", &do_abort, NULL,
 871                        "abort notes merge",
 872                        PARSE_OPT_NOARG | PARSE_OPT_NONEG },
 873                OPT_END()
 874        };
 875
 876        argc = parse_options(argc, argv, prefix, options,
 877                             git_notes_merge_usage, 0);
 878
 879        if (strategy || do_commit + do_abort == 0)
 880                do_merge = 1;
 881        if (do_merge + do_commit + do_abort != 1) {
 882                error("cannot mix --commit, --abort or -s/--strategy");
 883                usage_with_options(git_notes_merge_usage, options);
 884        }
 885
 886        if (do_merge && argc != 1) {
 887                error("Must specify a notes ref to merge");
 888                usage_with_options(git_notes_merge_usage, options);
 889        } else if (!do_merge && argc) {
 890                error("too many parameters");
 891                usage_with_options(git_notes_merge_usage, options);
 892        }
 893
 894        init_notes_merge_options(&o);
 895        o.verbosity = verbosity + NOTES_MERGE_VERBOSITY_DEFAULT;
 896
 897        if (do_abort)
 898                return merge_abort(&o);
 899        if (do_commit)
 900                return merge_commit(&o);
 901
 902        o.local_ref = default_notes_ref();
 903        strbuf_addstr(&remote_ref, argv[0]);
 904        expand_notes_ref(&remote_ref);
 905        o.remote_ref = remote_ref.buf;
 906
 907        if (strategy) {
 908                if (!strcmp(strategy, "manual"))
 909                        o.strategy = NOTES_MERGE_RESOLVE_MANUAL;
 910                else if (!strcmp(strategy, "ours"))
 911                        o.strategy = NOTES_MERGE_RESOLVE_OURS;
 912                else if (!strcmp(strategy, "theirs"))
 913                        o.strategy = NOTES_MERGE_RESOLVE_THEIRS;
 914                else if (!strcmp(strategy, "union"))
 915                        o.strategy = NOTES_MERGE_RESOLVE_UNION;
 916                else if (!strcmp(strategy, "cat_sort_uniq"))
 917                        o.strategy = NOTES_MERGE_RESOLVE_CAT_SORT_UNIQ;
 918                else {
 919                        error("Unknown -s/--strategy: %s", strategy);
 920                        usage_with_options(git_notes_merge_usage, options);
 921                }
 922        }
 923
 924        t = init_notes_check("merge");
 925
 926        strbuf_addf(&msg, "notes: Merged notes from %s into %s",
 927                    remote_ref.buf, default_notes_ref());
 928        strbuf_add(&(o.commit_msg), msg.buf + 7, msg.len - 7); /* skip "notes: " */
 929
 930        result = notes_merge(&o, t, result_sha1);
 931
 932        if (result >= 0) /* Merge resulted (trivially) in result_sha1 */
 933                /* Update default notes ref with new commit */
 934                update_ref(msg.buf, default_notes_ref(), result_sha1, NULL,
 935                           0, DIE_ON_ERR);
 936        else { /* Merge has unresolved conflicts */
 937                /* Update .git/NOTES_MERGE_PARTIAL with partial merge result */
 938                update_ref(msg.buf, "NOTES_MERGE_PARTIAL", result_sha1, NULL,
 939                           0, DIE_ON_ERR);
 940                /* Store ref-to-be-updated into .git/NOTES_MERGE_REF */
 941                if (create_symref("NOTES_MERGE_REF", default_notes_ref(), NULL))
 942                        die("Failed to store link to current notes ref (%s)",
 943                            default_notes_ref());
 944                printf("Automatic notes merge failed. Fix conflicts in %s and "
 945                       "commit the result with 'git notes merge --commit', or "
 946                       "abort the merge with 'git notes merge --abort'.\n",
 947                       git_path(NOTES_MERGE_WORKTREE));
 948        }
 949
 950        free_notes(t);
 951        strbuf_release(&remote_ref);
 952        strbuf_release(&msg);
 953        return result < 0; /* return non-zero on conflicts */
 954}
 955
 956#define IGNORE_MISSING 1
 957
 958static int remove_one_note(struct notes_tree *t, const char *name, unsigned flag)
 959{
 960        int status;
 961        unsigned char sha1[20];
 962        if (get_sha1(name, sha1))
 963                return error(_("Failed to resolve '%s' as a valid ref."), name);
 964        status = remove_note(t, sha1);
 965        if (status)
 966                fprintf(stderr, _("Object %s has no note\n"), name);
 967        else
 968                fprintf(stderr, _("Removing note for object %s\n"), name);
 969        return (flag & IGNORE_MISSING) ? 0 : status;
 970}
 971
 972static int remove_cmd(int argc, const char **argv, const char *prefix)
 973{
 974        unsigned flag = 0;
 975        int from_stdin = 0;
 976        struct option options[] = {
 977                OPT_BIT(0, "ignore-missing", &flag,
 978                        "attempt to remove non-existent note is not an error",
 979                        IGNORE_MISSING),
 980                OPT_BOOLEAN(0, "stdin", &from_stdin,
 981                            "read object names from the standard input"),
 982                OPT_END()
 983        };
 984        struct notes_tree *t;
 985        int retval = 0;
 986
 987        argc = parse_options(argc, argv, prefix, options,
 988                             git_notes_remove_usage, 0);
 989
 990        t = init_notes_check("remove");
 991
 992        if (!argc && !from_stdin) {
 993                retval = remove_one_note(t, "HEAD", flag);
 994        } else {
 995                while (*argv) {
 996                        retval |= remove_one_note(t, *argv, flag);
 997                        argv++;
 998                }
 999        }
1000        if (from_stdin) {
1001                struct strbuf sb = STRBUF_INIT;
1002                while (strbuf_getwholeline(&sb, stdin, '\n') != EOF) {
1003                        strbuf_rtrim(&sb);
1004                        retval |= remove_one_note(t, sb.buf, flag);
1005                }
1006                strbuf_release(&sb);
1007        }
1008        if (!retval)
1009                commit_notes(t, "Notes removed by 'git notes remove'");
1010        free_notes(t);
1011        return retval;
1012}
1013
1014static int prune(int argc, const char **argv, const char *prefix)
1015{
1016        struct notes_tree *t;
1017        int show_only = 0, verbose = 0;
1018        struct option options[] = {
1019                OPT__DRY_RUN(&show_only, "do not remove, show only"),
1020                OPT__VERBOSE(&verbose, "report pruned notes"),
1021                OPT_END()
1022        };
1023
1024        argc = parse_options(argc, argv, prefix, options, git_notes_prune_usage,
1025                             0);
1026
1027        if (argc) {
1028                error(_("too many parameters"));
1029                usage_with_options(git_notes_prune_usage, options);
1030        }
1031
1032        t = init_notes_check("prune");
1033
1034        prune_notes(t, (verbose ? NOTES_PRUNE_VERBOSE : 0) |
1035                (show_only ? NOTES_PRUNE_VERBOSE|NOTES_PRUNE_DRYRUN : 0) );
1036        if (!show_only)
1037                commit_notes(t, "Notes removed by 'git notes prune'");
1038        free_notes(t);
1039        return 0;
1040}
1041
1042static int get_ref(int argc, const char **argv, const char *prefix)
1043{
1044        struct option options[] = { OPT_END() };
1045        argc = parse_options(argc, argv, prefix, options,
1046                             git_notes_get_ref_usage, 0);
1047
1048        if (argc) {
1049                error("too many parameters");
1050                usage_with_options(git_notes_get_ref_usage, options);
1051        }
1052
1053        puts(default_notes_ref());
1054        return 0;
1055}
1056
1057int cmd_notes(int argc, const char **argv, const char *prefix)
1058{
1059        int result;
1060        const char *override_notes_ref = NULL;
1061        struct option options[] = {
1062                OPT_STRING(0, "ref", &override_notes_ref, "notes_ref",
1063                           "use notes from <notes_ref>"),
1064                OPT_END()
1065        };
1066
1067        git_config(git_default_config, NULL);
1068        argc = parse_options(argc, argv, prefix, options, git_notes_usage,
1069                             PARSE_OPT_STOP_AT_NON_OPTION);
1070
1071        if (override_notes_ref) {
1072                struct strbuf sb = STRBUF_INIT;
1073                strbuf_addstr(&sb, override_notes_ref);
1074                expand_notes_ref(&sb);
1075                setenv("GIT_NOTES_REF", sb.buf, 1);
1076                strbuf_release(&sb);
1077        }
1078
1079        if (argc < 1 || !strcmp(argv[0], "list"))
1080                result = list(argc, argv, prefix);
1081        else if (!strcmp(argv[0], "add"))
1082                result = add(argc, argv, prefix);
1083        else if (!strcmp(argv[0], "copy"))
1084                result = copy(argc, argv, prefix);
1085        else if (!strcmp(argv[0], "append") || !strcmp(argv[0], "edit"))
1086                result = append_edit(argc, argv, prefix);
1087        else if (!strcmp(argv[0], "show"))
1088                result = show(argc, argv, prefix);
1089        else if (!strcmp(argv[0], "merge"))
1090                result = merge(argc, argv, prefix);
1091        else if (!strcmp(argv[0], "remove"))
1092                result = remove_cmd(argc, argv, prefix);
1093        else if (!strcmp(argv[0], "prune"))
1094                result = prune(argc, argv, prefix);
1095        else if (!strcmp(argv[0], "get-ref"))
1096                result = get_ref(argc, argv, prefix);
1097        else {
1098                result = error(_("Unknown subcommand: %s"), argv[0]);
1099                usage_with_options(git_notes_usage, options);
1100        }
1101
1102        return result ? 1 : 0;
1103}