Andrew's git - gitweb.git/blob

   1#include "cache.h"
   2#include "config.h"
   3#include "builtin.h"
   4#include "parse-options.h"
   5#include "diff.h"
   6#include "revision.h"
   7#include "rerere.h"
   8#include "dir.h"
   9#include "sequencer.h"
  10#include "branch.h"
  11
  12/*
  13 * This implements the builtins revert and cherry-pick.
  14 *
  15 * Copyright (c) 2007 Johannes E. Schindelin
  16 *
  17 * Based on git-revert.sh, which is
  18 *
  19 * Copyright (c) 2005 Linus Torvalds
  20 * Copyright (c) 2005 Junio C Hamano
  21 */
  22
  23static const char * const revert_usage[] = {
  24        N_("git revert [<options>] <commit-ish>..."),
  25        N_("git revert <subcommand>"),
  26        NULL
  27};
  28
  29static const char * const cherry_pick_usage[] = {
  30        N_("git cherry-pick [<options>] <commit-ish>..."),
  31        N_("git cherry-pick <subcommand>"),
  32        NULL
  33};
  34
  35static const char *action_name(const struct replay_opts *opts)
  36{
  37        return opts->action == REPLAY_REVERT ? "revert" : "cherry-pick";
  38}
  39
  40static const char * const *revert_or_cherry_pick_usage(struct replay_opts *opts)
  41{
  42        return opts->action == REPLAY_REVERT ? revert_usage : cherry_pick_usage;
  43}
  44
  45static int option_parse_x(const struct option *opt,
  46                          const char *arg, int unset)
  47{
  48        struct replay_opts **opts_ptr = opt->value;
  49        struct replay_opts *opts = *opts_ptr;
  50
  51        if (unset)
  52                return 0;
  53
  54        ALLOC_GROW(opts->xopts, opts->xopts_nr + 1, opts->xopts_alloc);
  55        opts->xopts[opts->xopts_nr++] = xstrdup(arg);
  56        return 0;
  57}
  58
  59static int option_parse_m(const struct option *opt,
  60                          const char *arg, int unset)
  61{
  62        struct replay_opts *replay = opt->value;
  63        char *end;
  64
  65        if (unset) {
  66                replay->mainline = 0;
  67                return 0;
  68        }
  69
  70        replay->mainline = strtol(arg, &end, 10);
  71        if (*end || replay->mainline <= 0)
  72                return error(_("option `%s' expects a number greater than zero"),
  73                             opt->long_name);
  74
  75        return 0;
  76}
  77
  78LAST_ARG_MUST_BE_NULL
  79static void verify_opt_compatible(const char *me, const char *base_opt, ...)
  80{
  81        const char *this_opt;
  82        va_list ap;
  83
  84        va_start(ap, base_opt);
  85        while ((this_opt = va_arg(ap, const char *))) {
  86                if (va_arg(ap, int))
  87                        break;
  88        }
  89        va_end(ap);
  90
  91        if (this_opt)
  92                die(_("%s: %s cannot be used with %s"), me, this_opt, base_opt);
  93}
  94
  95static int run_sequencer(int argc, const char **argv, struct replay_opts *opts)
  96{
  97        const char * const * usage_str = revert_or_cherry_pick_usage(opts);
  98        const char *me = action_name(opts);
  99        int cmd = 0;
 100        struct option base_options[] = {
 101                OPT_CMDMODE(0, "quit", &cmd, N_("end revert or cherry-pick sequence"), 'q'),
 102                OPT_CMDMODE(0, "continue", &cmd, N_("resume revert or cherry-pick sequence"), 'c'),
 103                OPT_CMDMODE(0, "abort", &cmd, N_("cancel revert or cherry-pick sequence"), 'a'),
 104                OPT_BOOL('n', "no-commit", &opts->no_commit, N_("don't automatically commit")),
 105                OPT_BOOL('e', "edit", &opts->edit, N_("edit the commit message")),
 106                OPT_NOOP_NOARG('r', NULL),
 107                OPT_BOOL('s', "signoff", &opts->signoff, N_("add Signed-off-by:")),
 108                OPT_CALLBACK('m', "mainline", opts, N_("parent-number"),
 109                             N_("select mainline parent"), option_parse_m),
 110                OPT_RERERE_AUTOUPDATE(&opts->allow_rerere_auto),
 111                OPT_STRING(0, "strategy", &opts->strategy, N_("strategy"), N_("merge strategy")),
 112                OPT_CALLBACK('X', "strategy-option", &opts, N_("option"),
 113                        N_("option for merge strategy"), option_parse_x),
 114                { OPTION_STRING, 'S', "gpg-sign", &opts->gpg_sign, N_("key-id"),
 115                  N_("GPG sign commit"), PARSE_OPT_OPTARG, NULL, (intptr_t) "" },
 116                OPT_END()
 117        };
 118        struct option *options = base_options;
 119
 120        if (opts->action == REPLAY_PICK) {
 121                struct option cp_extra[] = {
 122                        OPT_BOOL('x', NULL, &opts->record_origin, N_("append commit name")),
 123                        OPT_BOOL(0, "ff", &opts->allow_ff, N_("allow fast-forward")),
 124                        OPT_BOOL(0, "allow-empty", &opts->allow_empty, N_("preserve initially empty commits")),
 125                        OPT_BOOL(0, "allow-empty-message", &opts->allow_empty_message, N_("allow commits with empty messages")),
 126                        OPT_BOOL(0, "keep-redundant-commits", &opts->keep_redundant_commits, N_("keep redundant, empty commits")),
 127                        OPT_END(),
 128                };
 129                options = parse_options_concat(options, cp_extra);
 130        }
 131
 132        argc = parse_options(argc, argv, NULL, options, usage_str,
 133                        PARSE_OPT_KEEP_ARGV0 |
 134                        PARSE_OPT_KEEP_UNKNOWN);
 135
 136        /* implies allow_empty */
 137        if (opts->keep_redundant_commits)
 138                opts->allow_empty = 1;
 139
 140        /* Check for incompatible command line arguments */
 141        if (cmd) {
 142                char *this_operation;
 143                if (cmd == 'q')
 144                        this_operation = "--quit";
 145                else if (cmd == 'c')
 146                        this_operation = "--continue";
 147                else {
 148                        assert(cmd == 'a');
 149                        this_operation = "--abort";
 150                }
 151
 152                verify_opt_compatible(me, this_operation,
 153                                "--no-commit", opts->no_commit,
 154                                "--signoff", opts->signoff,
 155                                "--mainline", opts->mainline,
 156                                "--strategy", opts->strategy ? 1 : 0,
 157                                "--strategy-option", opts->xopts ? 1 : 0,
 158                                "-x", opts->record_origin,
 159                                "--ff", opts->allow_ff,
 160                                "--rerere-autoupdate", opts->allow_rerere_auto == RERERE_AUTOUPDATE,
 161                                "--no-rerere-autoupdate", opts->allow_rerere_auto == RERERE_NOAUTOUPDATE,
 162                                NULL);
 163        }
 164
 165        if (opts->allow_ff)
 166                verify_opt_compatible(me, "--ff",
 167                                "--signoff", opts->signoff,
 168                                "--no-commit", opts->no_commit,
 169                                "-x", opts->record_origin,
 170                                "--edit", opts->edit,
 171                                NULL);
 172
 173        if (cmd) {
 174                opts->revs = NULL;
 175        } else {
 176                struct setup_revision_opt s_r_opt;
 177                opts->revs = xmalloc(sizeof(*opts->revs));
 178                repo_init_revisions(the_repository, opts->revs, NULL);
 179                opts->revs->no_walk = REVISION_WALK_NO_WALK_UNSORTED;
 180                if (argc < 2)
 181                        usage_with_options(usage_str, options);
 182                if (!strcmp(argv[1], "-"))
 183                        argv[1] = "@{-1}";
 184                memset(&s_r_opt, 0, sizeof(s_r_opt));
 185                s_r_opt.assume_dashdash = 1;
 186                argc = setup_revisions(argc, argv, opts->revs, &s_r_opt);
 187        }
 188
 189        if (argc > 1)
 190                usage_with_options(usage_str, options);
 191
 192        /* These option values will be free()d */
 193        opts->gpg_sign = xstrdup_or_null(opts->gpg_sign);
 194        opts->strategy = xstrdup_or_null(opts->strategy);
 195
 196        if (cmd == 'q') {
 197                int ret = sequencer_remove_state(opts);
 198                if (!ret)
 199                        remove_branch_state();
 200                return ret;
 201        }
 202        if (cmd == 'c')
 203                return sequencer_continue(opts);
 204        if (cmd == 'a')
 205                return sequencer_rollback(opts);
 206        return sequencer_pick_revisions(opts);
 207}
 208
 209int cmd_revert(int argc, const char **argv, const char *prefix)
 210{
 211        struct replay_opts opts = REPLAY_OPTS_INIT;
 212        int res;
 213
 214        if (isatty(0))
 215                opts.edit = 1;
 216        opts.action = REPLAY_REVERT;
 217        sequencer_init_config(&opts);
 218        res = run_sequencer(argc, argv, &opts);
 219        if (res < 0)
 220                die(_("revert failed"));
 221        return res;
 222}
 223
 224int cmd_cherry_pick(int argc, const char **argv, const char *prefix)
 225{
 226        struct replay_opts opts = REPLAY_OPTS_INIT;
 227        int res;
 228
 229        opts.action = REPLAY_PICK;
 230        sequencer_init_config(&opts);
 231        res = run_sequencer(argc, argv, &opts);
 232        if (res < 0)
 233                die(_("cherry-pick failed"));
 234        return res;
 235}