Andrew's git / gitweb.git / builtin/notes.c
?
builtin / notes.con commit t7810: avoid unportable use of "echo" (93d5e0c)
   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 void expand_notes_ref(struct strbuf *sb)
 104{
 105        if (!prefixcmp(sb->buf, "refs/notes/"))
 106                return; /* we're happy */
 107        else if (!prefixcmp(sb->buf, "notes/"))
 108                strbuf_insert(sb, 0, "refs/", 5);
 109        else
 110                strbuf_insert(sb, 0, "refs/notes/", 11);
 111}
 112
 113static int list_each_note(const unsigned char *object_sha1,
 114                const unsigned char *note_sha1, char *note_path,
 115                void *cb_data)
 116{
 117        printf("%s %s\n", sha1_to_hex(note_sha1), sha1_to_hex(object_sha1));
 118        return 0;
 119}
 120
 121static void write_note_data(int fd, const unsigned char *sha1)
 122{
 123        unsigned long size;
 124        enum object_type type;
 125        char *buf = read_sha1_file(sha1, &type, &size);
 126        if (buf) {
 127                if (size)
 128                        write_or_die(fd, buf, size);
 129                free(buf);
 130        }
 131}
 132
 133static void write_commented_object(int fd, const unsigned char *object)
 134{
 135        const char *show_args[5] =
 136                {"show", "--stat", "--no-notes", sha1_to_hex(object), NULL};
 137        struct child_process show;
 138        struct strbuf buf = STRBUF_INIT;
 139        FILE *show_out;
 140
 141        /* Invoke "git show --stat --no-notes $object" */
 142        memset(&show, 0, sizeof(show));
 143        show.argv = show_args;
 144        show.no_stdin = 1;
 145        show.out = -1;
 146        show.err = 0;
 147        show.git_cmd = 1;
 148        if (start_command(&show))
 149                die(_("unable to start 'show' for object '%s'"),
 150                    sha1_to_hex(object));
 151
 152        /* Open the output as FILE* so strbuf_getline() can be used. */
 153        show_out = xfdopen(show.out, "r");
 154        if (show_out == NULL)
 155                die_errno(_("can't fdopen 'show' output fd"));
 156
 157        /* Prepend "# " to each output line and write result to 'fd' */
 158        while (strbuf_getline(&buf, show_out, '\n') != EOF) {
 159                write_or_die(fd, "# ", 2);
 160                write_or_die(fd, buf.buf, buf.len);
 161                write_or_die(fd, "\n", 1);
 162        }
 163        strbuf_release(&buf);
 164        if (fclose(show_out))
 165                die_errno(_("failed to close pipe to 'show' for object '%s'"),
 166                          sha1_to_hex(object));
 167        if (finish_command(&show))
 168                die(_("failed to finish 'show' for object '%s'"),
 169                    sha1_to_hex(object));
 170}
 171
 172static void create_note(const unsigned char *object, struct msg_arg *msg,
 173                        int append_only, const unsigned char *prev,
 174                        unsigned char *result)
 175{
 176        char *path = NULL;
 177
 178        if (msg->use_editor || !msg->given) {
 179                int fd;
 180
 181                /* write the template message before editing: */
 182                path = git_pathdup("NOTES_EDITMSG");
 183                fd = open(path, O_CREAT | O_TRUNC | O_WRONLY, 0600);
 184                if (fd < 0)
 185                        die_errno(_("could not create file '%s'"), path);
 186
 187                if (msg->given)
 188                        write_or_die(fd, msg->buf.buf, msg->buf.len);
 189                else if (prev && !append_only)
 190                        write_note_data(fd, prev);
 191                write_or_die(fd, note_template, strlen(note_template));
 192
 193                write_commented_object(fd, object);
 194
 195                close(fd);
 196                strbuf_reset(&(msg->buf));
 197
 198                if (launch_editor(path, &(msg->buf), NULL)) {
 199                        die(_("Please supply the note contents using either -m" \
 200                            " or -F option"));
 201                }
 202                stripspace(&(msg->buf), 1);
 203        }
 204
 205        if (prev && append_only) {
 206                /* Append buf to previous note contents */
 207                unsigned long size;
 208                enum object_type type;
 209                char *prev_buf = read_sha1_file(prev, &type, &size);
 210
 211                strbuf_grow(&(msg->buf), size + 1);
 212                if (msg->buf.len && prev_buf && size)
 213                        strbuf_insert(&(msg->buf), 0, "\n", 1);
 214                if (prev_buf && size)
 215                        strbuf_insert(&(msg->buf), 0, prev_buf, size);
 216                free(prev_buf);
 217        }
 218
 219        if (!msg->buf.len) {
 220                fprintf(stderr, _("Removing note for object %s\n"),
 221                        sha1_to_hex(object));
 222                hashclr(result);
 223        } else {
 224                if (write_sha1_file(msg->buf.buf, msg->buf.len, blob_type, result)) {
 225                        error(_("unable to write note object"));
 226                        if (path)
 227                                error(_("The note contents has been left in %s"),
 228                                      path);
 229                        exit(128);
 230                }
 231        }
 232
 233        if (path) {
 234                unlink_or_warn(path);
 235                free(path);
 236        }
 237}
 238
 239static int parse_msg_arg(const struct option *opt, const char *arg, int unset)
 240{
 241        struct msg_arg *msg = opt->value;
 242
 243        strbuf_grow(&(msg->buf), strlen(arg) + 2);
 244        if (msg->buf.len)
 245                strbuf_addch(&(msg->buf), '\n');
 246        strbuf_addstr(&(msg->buf), arg);
 247        stripspace(&(msg->buf), 0);
 248
 249        msg->given = 1;
 250        return 0;
 251}
 252
 253static int parse_file_arg(const struct option *opt, const char *arg, int unset)
 254{
 255        struct msg_arg *msg = opt->value;
 256
 257        if (msg->buf.len)
 258                strbuf_addch(&(msg->buf), '\n');
 259        if (!strcmp(arg, "-")) {
 260                if (strbuf_read(&(msg->buf), 0, 1024) < 0)
 261                        die_errno(_("cannot read '%s'"), arg);
 262        } else if (strbuf_read_file(&(msg->buf), arg, 1024) < 0)
 263                die_errno(_("could not open or read '%s'"), arg);
 264        stripspace(&(msg->buf), 0);
 265
 266        msg->given = 1;
 267        return 0;
 268}
 269
 270static int parse_reuse_arg(const struct option *opt, const char *arg, int unset)
 271{
 272        struct msg_arg *msg = opt->value;
 273        char *buf;
 274        unsigned char object[20];
 275        enum object_type type;
 276        unsigned long len;
 277
 278        if (msg->buf.len)
 279                strbuf_addch(&(msg->buf), '\n');
 280
 281        if (get_sha1(arg, object))
 282                die(_("Failed to resolve '%s' as a valid ref."), arg);
 283        if (!(buf = read_sha1_file(object, &type, &len)) || !len) {
 284                free(buf);
 285                die(_("Failed to read object '%s'."), arg);;
 286        }
 287        strbuf_add(&(msg->buf), buf, len);
 288        free(buf);
 289
 290        msg->given = 1;
 291        return 0;
 292}
 293
 294static int parse_reedit_arg(const struct option *opt, const char *arg, int unset)
 295{
 296        struct msg_arg *msg = opt->value;
 297        msg->use_editor = 1;
 298        return parse_reuse_arg(opt, arg, unset);
 299}
 300
 301void commit_notes(struct notes_tree *t, const char *msg)
 302{
 303        struct strbuf buf = STRBUF_INIT;
 304        unsigned char commit_sha1[20];
 305
 306        if (!t)
 307                t = &default_notes_tree;
 308        if (!t->initialized || !t->ref || !*t->ref)
 309                die(_("Cannot commit uninitialized/unreferenced notes tree"));
 310        if (!t->dirty)
 311                return; /* don't have to commit an unchanged tree */
 312
 313        /* Prepare commit message and reflog message */
 314        strbuf_addstr(&buf, "notes: "); /* commit message starts at index 7 */
 315        strbuf_addstr(&buf, msg);
 316        if (buf.buf[buf.len - 1] != '\n')
 317                strbuf_addch(&buf, '\n'); /* Make sure msg ends with newline */
 318
 319        create_notes_commit(t, NULL, buf.buf + 7, commit_sha1);
 320        update_ref(buf.buf, t->ref, commit_sha1, NULL, 0, DIE_ON_ERR);
 321
 322        strbuf_release(&buf);
 323}
 324
 325combine_notes_fn parse_combine_notes_fn(const char *v)
 326{
 327        if (!strcasecmp(v, "overwrite"))
 328                return combine_notes_overwrite;
 329        else if (!strcasecmp(v, "ignore"))
 330                return combine_notes_ignore;
 331        else if (!strcasecmp(v, "concatenate"))
 332                return combine_notes_concatenate;
 333        else if (!strcasecmp(v, "cat_sort_uniq"))
 334                return combine_notes_cat_sort_uniq;
 335        else
 336                return NULL;
 337}
 338
 339static int notes_rewrite_config(const char *k, const char *v, void *cb)
 340{
 341        struct notes_rewrite_cfg *c = cb;
 342        if (!prefixcmp(k, "notes.rewrite.") && !strcmp(k+14, c->cmd)) {
 343                c->enabled = git_config_bool(k, v);
 344                return 0;
 345        } else if (!c->mode_from_env && !strcmp(k, "notes.rewritemode")) {
 346                if (!v)
 347                        config_error_nonbool(k);
 348                c->combine = parse_combine_notes_fn(v);
 349                if (!c->combine) {
 350                        error(_("Bad notes.rewriteMode value: '%s'"), v);
 351                        return 1;
 352                }
 353                return 0;
 354        } else if (!c->refs_from_env && !strcmp(k, "notes.rewriteref")) {
 355                /* note that a refs/ prefix is implied in the
 356                 * underlying for_each_glob_ref */
 357                if (!prefixcmp(v, "refs/notes/"))
 358                        string_list_add_refs_by_glob(c->refs, v);
 359                else
 360                        warning(_("Refusing to rewrite notes in %s"
 361                                " (outside of refs/notes/)"), v);
 362                return 0;
 363        }
 364
 365        return 0;
 366}
 367
 368
 369struct notes_rewrite_cfg *init_copy_notes_for_rewrite(const char *cmd)
 370{
 371        struct notes_rewrite_cfg *c = xmalloc(sizeof(struct notes_rewrite_cfg));
 372        const char *rewrite_mode_env = getenv(GIT_NOTES_REWRITE_MODE_ENVIRONMENT);
 373        const char *rewrite_refs_env = getenv(GIT_NOTES_REWRITE_REF_ENVIRONMENT);
 374        c->cmd = cmd;
 375        c->enabled = 1;
 376        c->combine = combine_notes_concatenate;
 377        c->refs = xcalloc(1, sizeof(struct string_list));
 378        c->refs->strdup_strings = 1;
 379        c->refs_from_env = 0;
 380        c->mode_from_env = 0;
 381        if (rewrite_mode_env) {
 382                c->mode_from_env = 1;
 383                c->combine = parse_combine_notes_fn(rewrite_mode_env);
 384                if (!c->combine)
 385                        /* TRANSLATORS: The first %s is the name of the
 386                           environment variable, the second %s is its value */
 387                        error(_("Bad %s value: '%s'"), GIT_NOTES_REWRITE_MODE_ENVIRONMENT,
 388                                        rewrite_mode_env);
 389        }
 390        if (rewrite_refs_env) {
 391                c->refs_from_env = 1;
 392                string_list_add_refs_from_colon_sep(c->refs, rewrite_refs_env);
 393        }
 394        git_config(notes_rewrite_config, c);
 395        if (!c->enabled || !c->refs->nr) {
 396                string_list_clear(c->refs, 0);
 397                free(c->refs);
 398                free(c);
 399                return NULL;
 400        }
 401        c->trees = load_notes_trees(c->refs);
 402        string_list_clear(c->refs, 0);
 403        free(c->refs);
 404        return c;
 405}
 406
 407int copy_note_for_rewrite(struct notes_rewrite_cfg *c,
 408                          const unsigned char *from_obj, const unsigned char *to_obj)
 409{
 410        int ret = 0;
 411        int i;
 412        for (i = 0; c->trees[i]; i++)
 413                ret = copy_note(c->trees[i], from_obj, to_obj, 1, c->combine) || ret;
 414        return ret;
 415}
 416
 417void finish_copy_notes_for_rewrite(struct notes_rewrite_cfg *c)
 418{
 419        int i;
 420        for (i = 0; c->trees[i]; i++) {
 421                commit_notes(c->trees[i], "Notes added by 'git notes copy'");
 422                free_notes(c->trees[i]);
 423        }
 424        free(c->trees);
 425        free(c);
 426}
 427
 428static int notes_copy_from_stdin(int force, const char *rewrite_cmd)
 429{
 430        struct strbuf buf = STRBUF_INIT;
 431        struct notes_rewrite_cfg *c = NULL;
 432        struct notes_tree *t = NULL;
 433        int ret = 0;
 434
 435        if (rewrite_cmd) {
 436                c = init_copy_notes_for_rewrite(rewrite_cmd);
 437                if (!c)
 438                        return 0;
 439        } else {
 440                init_notes(NULL, NULL, NULL, 0);
 441                t = &default_notes_tree;
 442        }
 443
 444        while (strbuf_getline(&buf, stdin, '\n') != EOF) {
 445                unsigned char from_obj[20], to_obj[20];
 446                struct strbuf **split;
 447                int err;
 448
 449                split = strbuf_split(&buf, ' ');
 450                if (!split[0] || !split[1])
 451                        die(_("Malformed input line: '%s'."), buf.buf);
 452                strbuf_rtrim(split[0]);
 453                strbuf_rtrim(split[1]);
 454                if (get_sha1(split[0]->buf, from_obj))
 455                        die(_("Failed to resolve '%s' as a valid ref."), split[0]->buf);
 456                if (get_sha1(split[1]->buf, to_obj))
 457                        die(_("Failed to resolve '%s' as a valid ref."), split[1]->buf);
 458
 459                if (rewrite_cmd)
 460                        err = copy_note_for_rewrite(c, from_obj, to_obj);
 461                else
 462                        err = copy_note(t, from_obj, to_obj, force,
 463                                        combine_notes_overwrite);
 464
 465                if (err) {
 466                        error(_("Failed to copy notes from '%s' to '%s'"),
 467                              split[0]->buf, split[1]->buf);
 468                        ret = 1;
 469                }
 470
 471                strbuf_list_free(split);
 472        }
 473
 474        if (!rewrite_cmd) {
 475                commit_notes(t, "Notes added by 'git notes copy'");
 476                free_notes(t);
 477        } else {
 478                finish_copy_notes_for_rewrite(c);
 479        }
 480        return ret;
 481}
 482
 483static struct notes_tree *init_notes_check(const char *subcommand)
 484{
 485        struct notes_tree *t;
 486        init_notes(NULL, NULL, NULL, 0);
 487        t = &default_notes_tree;
 488
 489        if (prefixcmp(t->ref, "refs/notes/"))
 490                die("Refusing to %s notes in %s (outside of refs/notes/)",
 491                    subcommand, t->ref);
 492        return t;
 493}
 494
 495static int list(int argc, const char **argv, const char *prefix)
 496{
 497        struct notes_tree *t;
 498        unsigned char object[20];
 499        const unsigned char *note;
 500        int retval = -1;
 501        struct option options[] = {
 502                OPT_END()
 503        };
 504
 505        if (argc)
 506                argc = parse_options(argc, argv, prefix, options,
 507                                     git_notes_list_usage, 0);
 508
 509        if (1 < argc) {
 510                error(_("too many parameters"));
 511                usage_with_options(git_notes_list_usage, options);
 512        }
 513
 514        t = init_notes_check("list");
 515        if (argc) {
 516                if (get_sha1(argv[0], object))
 517                        die(_("Failed to resolve '%s' as a valid ref."), argv[0]);
 518                note = get_note(t, object);
 519                if (note) {
 520                        puts(sha1_to_hex(note));
 521                        retval = 0;
 522                } else
 523                        retval = error(_("No note found for object %s."),
 524                                       sha1_to_hex(object));
 525        } else
 526                retval = for_each_note(t, 0, list_each_note, NULL);
 527
 528        free_notes(t);
 529        return retval;
 530}
 531
 532static int add(int argc, const char **argv, const char *prefix)
 533{
 534        int retval = 0, force = 0;
 535        const char *object_ref;
 536        struct notes_tree *t;
 537        unsigned char object[20], new_note[20];
 538        char logmsg[100];
 539        const unsigned char *note;
 540        struct msg_arg msg = { 0, 0, STRBUF_INIT };
 541        struct option options[] = {
 542                { OPTION_CALLBACK, 'm', "message", &msg, "msg",
 543                        "note contents as a string", PARSE_OPT_NONEG,
 544                        parse_msg_arg},
 545                { OPTION_CALLBACK, 'F', "file", &msg, "file",
 546                        "note contents in a file", PARSE_OPT_NONEG,
 547                        parse_file_arg},
 548                { OPTION_CALLBACK, 'c', "reedit-message", &msg, "object",
 549                        "reuse and edit specified note object", PARSE_OPT_NONEG,
 550                        parse_reedit_arg},
 551                { OPTION_CALLBACK, 'C', "reuse-message", &msg, "object",
 552                        "reuse specified note object", PARSE_OPT_NONEG,
 553                        parse_reuse_arg},
 554                OPT__FORCE(&force, "replace existing notes"),
 555                OPT_END()
 556        };
 557
 558        argc = parse_options(argc, argv, prefix, options, git_notes_add_usage,
 559                             0);
 560
 561        if (1 < argc) {
 562                error(_("too many parameters"));
 563                usage_with_options(git_notes_add_usage, options);
 564        }
 565
 566        object_ref = argc ? argv[0] : "HEAD";
 567
 568        if (get_sha1(object_ref, object))
 569                die(_("Failed to resolve '%s' as a valid ref."), object_ref);
 570
 571        t = init_notes_check("add");
 572        note = get_note(t, object);
 573
 574        if (note) {
 575                if (!force) {
 576                        retval = error(_("Cannot add notes. Found existing notes "
 577                                       "for object %s. Use '-f' to overwrite "
 578                                       "existing notes"), sha1_to_hex(object));
 579                        goto out;
 580                }
 581                fprintf(stderr, _("Overwriting existing notes for object %s\n"),
 582                        sha1_to_hex(object));
 583        }
 584
 585        create_note(object, &msg, 0, note, new_note);
 586
 587        if (is_null_sha1(new_note))
 588                remove_note(t, object);
 589        else if (add_note(t, object, new_note, combine_notes_overwrite))
 590                die("BUG: combine_notes_overwrite failed");
 591
 592        snprintf(logmsg, sizeof(logmsg), "Notes %s by 'git notes %s'",
 593                 is_null_sha1(new_note) ? "removed" : "added", "add");
 594        commit_notes(t, logmsg);
 595out:
 596        free_notes(t);
 597        strbuf_release(&(msg.buf));
 598        return retval;
 599}
 600
 601static int copy(int argc, const char **argv, const char *prefix)
 602{
 603        int retval = 0, force = 0, from_stdin = 0;
 604        const unsigned char *from_note, *note;
 605        const char *object_ref;
 606        unsigned char object[20], from_obj[20];
 607        struct notes_tree *t;
 608        const char *rewrite_cmd = NULL;
 609        struct option options[] = {
 610                OPT__FORCE(&force, "replace existing notes"),
 611                OPT_BOOLEAN(0, "stdin", &from_stdin, "read objects from stdin"),
 612                OPT_STRING(0, "for-rewrite", &rewrite_cmd, "command",
 613                           "load rewriting config for <command> (implies "
 614                           "--stdin)"),
 615                OPT_END()
 616        };
 617
 618        argc = parse_options(argc, argv, prefix, options, git_notes_copy_usage,
 619                             0);
 620
 621        if (from_stdin || rewrite_cmd) {
 622                if (argc) {
 623                        error(_("too many parameters"));
 624                        usage_with_options(git_notes_copy_usage, options);
 625                } else {
 626                        return notes_copy_from_stdin(force, rewrite_cmd);
 627                }
 628        }
 629
 630        if (argc < 2) {
 631                error(_("too few parameters"));
 632                usage_with_options(git_notes_copy_usage, options);
 633        }
 634        if (2 < argc) {
 635                error(_("too many parameters"));
 636                usage_with_options(git_notes_copy_usage, options);
 637        }
 638
 639        if (get_sha1(argv[0], from_obj))
 640                die(_("Failed to resolve '%s' as a valid ref."), argv[0]);
 641
 642        object_ref = 1 < argc ? argv[1] : "HEAD";
 643
 644        if (get_sha1(object_ref, object))
 645                die(_("Failed to resolve '%s' as a valid ref."), object_ref);
 646
 647        t = init_notes_check("copy");
 648        note = get_note(t, object);
 649
 650        if (note) {
 651                if (!force) {
 652                        retval = error(_("Cannot copy notes. Found existing "
 653                                       "notes for object %s. Use '-f' to "
 654                                       "overwrite existing notes"),
 655                                       sha1_to_hex(object));
 656                        goto out;
 657                }
 658                fprintf(stderr, _("Overwriting existing notes for object %s\n"),
 659                        sha1_to_hex(object));
 660        }
 661
 662        from_note = get_note(t, from_obj);
 663        if (!from_note) {
 664                retval = error(_("Missing notes on source object %s. Cannot "
 665                               "copy."), sha1_to_hex(from_obj));
 666                goto out;
 667        }
 668
 669        if (add_note(t, object, from_note, combine_notes_overwrite))
 670                die("BUG: combine_notes_overwrite failed");
 671        commit_notes(t, "Notes added by 'git notes copy'");
 672out:
 673        free_notes(t);
 674        return retval;
 675}
 676
 677static int append_edit(int argc, const char **argv, const char *prefix)
 678{
 679        const char *object_ref;
 680        struct notes_tree *t;
 681        unsigned char object[20], new_note[20];
 682        const unsigned char *note;
 683        char logmsg[100];
 684        const char * const *usage;
 685        struct msg_arg msg = { 0, 0, STRBUF_INIT };
 686        struct option options[] = {
 687                { OPTION_CALLBACK, 'm', "message", &msg, "msg",
 688                        "note contents as a string", PARSE_OPT_NONEG,
 689                        parse_msg_arg},
 690                { OPTION_CALLBACK, 'F', "file", &msg, "file",
 691                        "note contents in a file", PARSE_OPT_NONEG,
 692                        parse_file_arg},
 693                { OPTION_CALLBACK, 'c', "reedit-message", &msg, "object",
 694                        "reuse and edit specified note object", PARSE_OPT_NONEG,
 695                        parse_reedit_arg},
 696                { OPTION_CALLBACK, 'C', "reuse-message", &msg, "object",
 697                        "reuse specified note object", PARSE_OPT_NONEG,
 698                        parse_reuse_arg},
 699                OPT_END()
 700        };
 701        int edit = !strcmp(argv[0], "edit");
 702
 703        usage = edit ? git_notes_edit_usage : git_notes_append_usage;
 704        argc = parse_options(argc, argv, prefix, options, usage,
 705                             PARSE_OPT_KEEP_ARGV0);
 706
 707        if (2 < argc) {
 708                error(_("too many parameters"));
 709                usage_with_options(usage, options);
 710        }
 711
 712        if (msg.given && edit)
 713                fprintf(stderr, _("The -m/-F/-c/-C options have been deprecated "
 714                        "for the 'edit' subcommand.\n"
 715                        "Please use 'git notes add -f -m/-F/-c/-C' instead.\n"));
 716
 717        object_ref = 1 < argc ? argv[1] : "HEAD";
 718
 719        if (get_sha1(object_ref, object))
 720                die(_("Failed to resolve '%s' as a valid ref."), object_ref);
 721
 722        t = init_notes_check(argv[0]);
 723        note = get_note(t, object);
 724
 725        create_note(object, &msg, !edit, note, new_note);
 726
 727        if (is_null_sha1(new_note))
 728                remove_note(t, object);
 729        else if (add_note(t, object, new_note, combine_notes_overwrite))
 730                die("BUG: combine_notes_overwrite failed");
 731
 732        snprintf(logmsg, sizeof(logmsg), "Notes %s by 'git notes %s'",
 733                 is_null_sha1(new_note) ? "removed" : "added", argv[0]);
 734        commit_notes(t, logmsg);
 735        free_notes(t);
 736        strbuf_release(&(msg.buf));
 737        return 0;
 738}
 739
 740static int show(int argc, const char **argv, const char *prefix)
 741{
 742        const char *object_ref;
 743        struct notes_tree *t;
 744        unsigned char object[20];
 745        const unsigned char *note;
 746        int retval;
 747        struct option options[] = {
 748                OPT_END()
 749        };
 750
 751        argc = parse_options(argc, argv, prefix, options, git_notes_show_usage,
 752                             0);
 753
 754        if (1 < argc) {
 755                error(_("too many parameters"));
 756                usage_with_options(git_notes_show_usage, options);
 757        }
 758
 759        object_ref = argc ? argv[0] : "HEAD";
 760
 761        if (get_sha1(object_ref, object))
 762                die(_("Failed to resolve '%s' as a valid ref."), object_ref);
 763
 764        t = init_notes_check("show");
 765        note = get_note(t, object);
 766
 767        if (!note)
 768                retval = error(_("No note found for object %s."),
 769                               sha1_to_hex(object));
 770        else {
 771                const char *show_args[3] = {"show", sha1_to_hex(note), NULL};
 772                retval = execv_git_cmd(show_args);
 773        }
 774        free_notes(t);
 775        return retval;
 776}
 777
 778static int merge_abort(struct notes_merge_options *o)
 779{
 780        int ret = 0;
 781
 782        /*
 783         * Remove .git/NOTES_MERGE_PARTIAL and .git/NOTES_MERGE_REF, and call
 784         * notes_merge_abort() to remove .git/NOTES_MERGE_WORKTREE.
 785         */
 786
 787        if (delete_ref("NOTES_MERGE_PARTIAL", NULL, 0))
 788                ret += error("Failed to delete ref NOTES_MERGE_PARTIAL");
 789        if (delete_ref("NOTES_MERGE_REF", NULL, REF_NODEREF))
 790                ret += error("Failed to delete ref NOTES_MERGE_REF");
 791        if (notes_merge_abort(o))
 792                ret += error("Failed to remove 'git notes merge' worktree");
 793        return ret;
 794}
 795
 796static int merge_commit(struct notes_merge_options *o)
 797{
 798        struct strbuf msg = STRBUF_INIT;
 799        unsigned char sha1[20], parent_sha1[20];
 800        struct notes_tree *t;
 801        struct commit *partial;
 802        struct pretty_print_context pretty_ctx;
 803
 804        /*
 805         * Read partial merge result from .git/NOTES_MERGE_PARTIAL,
 806         * and target notes ref from .git/NOTES_MERGE_REF.
 807         */
 808
 809        if (get_sha1("NOTES_MERGE_PARTIAL", sha1))
 810                die("Failed to read ref NOTES_MERGE_PARTIAL");
 811        else if (!(partial = lookup_commit_reference(sha1)))
 812                die("Could not find commit from NOTES_MERGE_PARTIAL.");
 813        else if (parse_commit(partial))
 814                die("Could not parse commit from NOTES_MERGE_PARTIAL.");
 815
 816        if (partial->parents)
 817                hashcpy(parent_sha1, partial->parents->item->object.sha1);
 818        else
 819                hashclr(parent_sha1);
 820
 821        t = xcalloc(1, sizeof(struct notes_tree));
 822        init_notes(t, "NOTES_MERGE_PARTIAL", combine_notes_overwrite, 0);
 823
 824        o->local_ref = resolve_ref("NOTES_MERGE_REF", sha1, 0, NULL);
 825        if (!o->local_ref)
 826                die("Failed to resolve NOTES_MERGE_REF");
 827
 828        if (notes_merge_commit(o, t, partial, sha1))
 829                die("Failed to finalize notes merge");
 830
 831        /* Reuse existing commit message in reflog message */
 832        memset(&pretty_ctx, 0, sizeof(pretty_ctx));
 833        format_commit_message(partial, "%s", &msg, &pretty_ctx);
 834        strbuf_trim(&msg);
 835        strbuf_insert(&msg, 0, "notes: ", 7);
 836        update_ref(msg.buf, o->local_ref, sha1,
 837                   is_null_sha1(parent_sha1) ? NULL : parent_sha1,
 838                   0, DIE_ON_ERR);
 839
 840        free_notes(t);
 841        strbuf_release(&msg);
 842        return merge_abort(o);
 843}
 844
 845static int merge(int argc, const char **argv, const char *prefix)
 846{
 847        struct strbuf remote_ref = STRBUF_INIT, msg = STRBUF_INIT;
 848        unsigned char result_sha1[20];
 849        struct notes_tree *t;
 850        struct notes_merge_options o;
 851        int do_merge = 0, do_commit = 0, do_abort = 0;
 852        int verbosity = 0, result;
 853        const char *strategy = NULL;
 854        struct option options[] = {
 855                OPT_GROUP("General options"),
 856                OPT__VERBOSITY(&verbosity),
 857                OPT_GROUP("Merge options"),
 858                OPT_STRING('s', "strategy", &strategy, "strategy",
 859                           "resolve notes conflicts using the given strategy "
 860                           "(manual/ours/theirs/union/cat_sort_uniq)"),
 861                OPT_GROUP("Committing unmerged notes"),
 862                { OPTION_BOOLEAN, 0, "commit", &do_commit, NULL,
 863                        "finalize notes merge by committing unmerged notes",
 864                        PARSE_OPT_NOARG | PARSE_OPT_NONEG },
 865                OPT_GROUP("Aborting notes merge resolution"),
 866                { OPTION_BOOLEAN, 0, "abort", &do_abort, NULL,
 867                        "abort notes merge",
 868                        PARSE_OPT_NOARG | PARSE_OPT_NONEG },
 869                OPT_END()
 870        };
 871
 872        argc = parse_options(argc, argv, prefix, options,
 873                             git_notes_merge_usage, 0);
 874
 875        if (strategy || do_commit + do_abort == 0)
 876                do_merge = 1;
 877        if (do_merge + do_commit + do_abort != 1) {
 878                error("cannot mix --commit, --abort or -s/--strategy");
 879                usage_with_options(git_notes_merge_usage, options);
 880        }
 881
 882        if (do_merge && argc != 1) {
 883                error("Must specify a notes ref to merge");
 884                usage_with_options(git_notes_merge_usage, options);
 885        } else if (!do_merge && argc) {
 886                error("too many parameters");
 887                usage_with_options(git_notes_merge_usage, options);
 888        }
 889
 890        init_notes_merge_options(&o);
 891        o.verbosity = verbosity + NOTES_MERGE_VERBOSITY_DEFAULT;
 892
 893        if (do_abort)
 894                return merge_abort(&o);
 895        if (do_commit)
 896                return merge_commit(&o);
 897
 898        o.local_ref = default_notes_ref();
 899        strbuf_addstr(&remote_ref, argv[0]);
 900        expand_notes_ref(&remote_ref);
 901        o.remote_ref = remote_ref.buf;
 902
 903        if (strategy) {
 904                if (!strcmp(strategy, "manual"))
 905                        o.strategy = NOTES_MERGE_RESOLVE_MANUAL;
 906                else if (!strcmp(strategy, "ours"))
 907                        o.strategy = NOTES_MERGE_RESOLVE_OURS;
 908                else if (!strcmp(strategy, "theirs"))
 909                        o.strategy = NOTES_MERGE_RESOLVE_THEIRS;
 910                else if (!strcmp(strategy, "union"))
 911                        o.strategy = NOTES_MERGE_RESOLVE_UNION;
 912                else if (!strcmp(strategy, "cat_sort_uniq"))
 913                        o.strategy = NOTES_MERGE_RESOLVE_CAT_SORT_UNIQ;
 914                else {
 915                        error("Unknown -s/--strategy: %s", strategy);
 916                        usage_with_options(git_notes_merge_usage, options);
 917                }
 918        }
 919
 920        t = init_notes_check("merge");
 921
 922        strbuf_addf(&msg, "notes: Merged notes from %s into %s",
 923                    remote_ref.buf, default_notes_ref());
 924        strbuf_add(&(o.commit_msg), msg.buf + 7, msg.len - 7); /* skip "notes: " */
 925
 926        result = notes_merge(&o, t, result_sha1);
 927
 928        if (result >= 0) /* Merge resulted (trivially) in result_sha1 */
 929                /* Update default notes ref with new commit */
 930                update_ref(msg.buf, default_notes_ref(), result_sha1, NULL,
 931                           0, DIE_ON_ERR);
 932        else { /* Merge has unresolved conflicts */
 933                /* Update .git/NOTES_MERGE_PARTIAL with partial merge result */
 934                update_ref(msg.buf, "NOTES_MERGE_PARTIAL", result_sha1, NULL,
 935                           0, DIE_ON_ERR);
 936                /* Store ref-to-be-updated into .git/NOTES_MERGE_REF */
 937                if (create_symref("NOTES_MERGE_REF", default_notes_ref(), NULL))
 938                        die("Failed to store link to current notes ref (%s)",
 939                            default_notes_ref());
 940                printf("Automatic notes merge failed. Fix conflicts in %s and "
 941                       "commit the result with 'git notes merge --commit', or "
 942                       "abort the merge with 'git notes merge --abort'.\n",
 943                       git_path(NOTES_MERGE_WORKTREE));
 944        }
 945
 946        free_notes(t);
 947        strbuf_release(&remote_ref);
 948        strbuf_release(&msg);
 949        return result < 0; /* return non-zero on conflicts */
 950}
 951
 952static int remove_cmd(int argc, const char **argv, const char *prefix)
 953{
 954        struct option options[] = {
 955                OPT_END()
 956        };
 957        const char *object_ref;
 958        struct notes_tree *t;
 959        unsigned char object[20];
 960        int retval;
 961
 962        argc = parse_options(argc, argv, prefix, options,
 963                             git_notes_remove_usage, 0);
 964
 965        if (1 < argc) {
 966                error(_("too many parameters"));
 967                usage_with_options(git_notes_remove_usage, options);
 968        }
 969
 970        object_ref = argc ? argv[0] : "HEAD";
 971
 972        if (get_sha1(object_ref, object))
 973                die(_("Failed to resolve '%s' as a valid ref."), object_ref);
 974
 975        t = init_notes_check("remove");
 976
 977        retval = remove_note(t, object);
 978        if (retval)
 979                fprintf(stderr, _("Object %s has no note\n"), sha1_to_hex(object));
 980        else {
 981                fprintf(stderr, _("Removing note for object %s\n"),
 982                        sha1_to_hex(object));
 983
 984                commit_notes(t, "Notes removed by 'git notes remove'");
 985        }
 986        free_notes(t);
 987        return retval;
 988}
 989
 990static int prune(int argc, const char **argv, const char *prefix)
 991{
 992        struct notes_tree *t;
 993        int show_only = 0, verbose = 0;
 994        struct option options[] = {
 995                OPT__DRY_RUN(&show_only, "do not remove, show only"),
 996                OPT__VERBOSE(&verbose, "report pruned notes"),
 997                OPT_END()
 998        };
 999
1000        argc = parse_options(argc, argv, prefix, options, git_notes_prune_usage,
1001                             0);
1002
1003        if (argc) {
1004                error(_("too many parameters"));
1005                usage_with_options(git_notes_prune_usage, options);
1006        }
1007
1008        t = init_notes_check("prune");
1009
1010        prune_notes(t, (verbose ? NOTES_PRUNE_VERBOSE : 0) |
1011                (show_only ? NOTES_PRUNE_VERBOSE|NOTES_PRUNE_DRYRUN : 0) );
1012        if (!show_only)
1013                commit_notes(t, "Notes removed by 'git notes prune'");
1014        free_notes(t);
1015        return 0;
1016}
1017
1018static int get_ref(int argc, const char **argv, const char *prefix)
1019{
1020        struct option options[] = { OPT_END() };
1021        argc = parse_options(argc, argv, prefix, options,
1022                             git_notes_get_ref_usage, 0);
1023
1024        if (argc) {
1025                error("too many parameters");
1026                usage_with_options(git_notes_get_ref_usage, options);
1027        }
1028
1029        puts(default_notes_ref());
1030        return 0;
1031}
1032
1033int cmd_notes(int argc, const char **argv, const char *prefix)
1034{
1035        int result;
1036        const char *override_notes_ref = NULL;
1037        struct option options[] = {
1038                OPT_STRING(0, "ref", &override_notes_ref, "notes_ref",
1039                           "use notes from <notes_ref>"),
1040                OPT_END()
1041        };
1042
1043        git_config(git_default_config, NULL);
1044        argc = parse_options(argc, argv, prefix, options, git_notes_usage,
1045                             PARSE_OPT_STOP_AT_NON_OPTION);
1046
1047        if (override_notes_ref) {
1048                struct strbuf sb = STRBUF_INIT;
1049                strbuf_addstr(&sb, override_notes_ref);
1050                expand_notes_ref(&sb);
1051                setenv("GIT_NOTES_REF", sb.buf, 1);
1052                strbuf_release(&sb);
1053        }
1054
1055        if (argc < 1 || !strcmp(argv[0], "list"))
1056                result = list(argc, argv, prefix);
1057        else if (!strcmp(argv[0], "add"))
1058                result = add(argc, argv, prefix);
1059        else if (!strcmp(argv[0], "copy"))
1060                result = copy(argc, argv, prefix);
1061        else if (!strcmp(argv[0], "append") || !strcmp(argv[0], "edit"))
1062                result = append_edit(argc, argv, prefix);
1063        else if (!strcmp(argv[0], "show"))
1064                result = show(argc, argv, prefix);
1065        else if (!strcmp(argv[0], "merge"))
1066                result = merge(argc, argv, prefix);
1067        else if (!strcmp(argv[0], "remove"))
1068                result = remove_cmd(argc, argv, prefix);
1069        else if (!strcmp(argv[0], "prune"))
1070                result = prune(argc, argv, prefix);
1071        else if (!strcmp(argv[0], "get-ref"))
1072                result = get_ref(argc, argv, prefix);
1073        else {
1074                result = error(_("Unknown subcommand: %s"), argv[0]);
1075                usage_with_options(git_notes_usage, options);
1076        }
1077
1078        return result ? 1 : 0;
1079}