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 opterror(opt, "expects a number greater than zero", 0);
  73
  74        return 0;
  75}
  76
  77LAST_ARG_MUST_BE_NULL
  78static void verify_opt_compatible(const char *me, const char *base_opt, ...)
  79{
  80        const char *this_opt;
  81        va_list ap;
  82
  83        va_start(ap, base_opt);
  84        while ((this_opt = va_arg(ap, const char *))) {
  85                if (va_arg(ap, int))
  86                        break;
  87        }
  88        va_end(ap);
  89
  90        if (this_opt)
  91                die(_("%s: %s cannot be used with %s"), me, this_opt, base_opt);
  92}
  93
  94static int run_sequencer(int argc, const char **argv, struct replay_opts *opts)
  95{
  96        const char * const * usage_str = revert_or_cherry_pick_usage(opts);
  97        const char *me = action_name(opts);
  98        int cmd = 0;
  99        struct option base_options[] = {
 100                OPT_CMDMODE(0, "quit", &cmd, N_("end revert or cherry-pick sequence"), 'q'),
 101                OPT_CMDMODE(0, "continue", &cmd, N_("resume revert or cherry-pick sequence"), 'c'),
 102                OPT_CMDMODE(0, "abort", &cmd, N_("cancel revert or cherry-pick sequence"), 'a'),
 103                OPT_BOOL('n', "no-commit", &opts->no_commit, N_("don't automatically commit")),
 104                OPT_BOOL('e', "edit", &opts->edit, N_("edit the commit message")),
 105                OPT_NOOP_NOARG('r', NULL),
 106                OPT_BOOL('s', "signoff", &opts->signoff, N_("add Signed-off-by:")),
 107                OPT_CALLBACK('m', "mainline", opts, N_("parent-number"),
 108                             N_("select mainline parent"), option_parse_m),
 109                OPT_RERERE_AUTOUPDATE(&opts->allow_rerere_auto),
 110                OPT_STRING(0, "strategy", &opts->strategy, N_("strategy"), N_("merge strategy")),
 111                OPT_CALLBACK('X', "strategy-option", &opts, N_("option"),
 112                        N_("option for merge strategy"), option_parse_x),
 113                { OPTION_STRING, 'S', "gpg-sign", &opts->gpg_sign, N_("key-id"),
 114                  N_("GPG sign commit"), PARSE_OPT_OPTARG, NULL, (intptr_t) "" },
 115                OPT_END()
 116        };
 117        struct option *options = base_options;
 118
 119        if (opts->action == REPLAY_PICK) {
 120                struct option cp_extra[] = {
 121                        OPT_BOOL('x', NULL, &opts->record_origin, N_("append commit name")),
 122                        OPT_BOOL(0, "ff", &opts->allow_ff, N_("allow fast-forward")),
 123                        OPT_BOOL(0, "allow-empty", &opts->allow_empty, N_("preserve initially empty commits")),
 124                        OPT_BOOL(0, "allow-empty-message", &opts->allow_empty_message, N_("allow commits with empty messages")),
 125                        OPT_BOOL(0, "keep-redundant-commits", &opts->keep_redundant_commits, N_("keep redundant, empty commits")),
 126                        OPT_END(),
 127                };
 128                options = parse_options_concat(options, cp_extra);
 129        }
 130
 131        argc = parse_options(argc, argv, NULL, options, usage_str,
 132                        PARSE_OPT_KEEP_ARGV0 |
 133                        PARSE_OPT_KEEP_UNKNOWN);
 134
 135        /* implies allow_empty */
 136        if (opts->keep_redundant_commits)
 137                opts->allow_empty = 1;
 138
 139        /* Check for incompatible command line arguments */
 140        if (cmd) {
 141                char *this_operation;
 142                if (cmd == 'q')
 143                        this_operation = "--quit";
 144                else if (cmd == 'c')
 145                        this_operation = "--continue";
 146                else {
 147                        assert(cmd == 'a');
 148                        this_operation = "--abort";
 149                }
 150
 151                verify_opt_compatible(me, this_operation,
 152                                "--no-commit", opts->no_commit,
 153                                "--signoff", opts->signoff,
 154                                "--mainline", opts->mainline,
 155                                "--strategy", opts->strategy ? 1 : 0,
 156                                "--strategy-option", opts->xopts ? 1 : 0,
 157                                "-x", opts->record_origin,
 158                                "--ff", opts->allow_ff,
 159                                "--rerere-autoupdate", opts->allow_rerere_auto == RERERE_AUTOUPDATE,
 160                                "--no-rerere-autoupdate", opts->allow_rerere_auto == RERERE_NOAUTOUPDATE,
 161                                NULL);
 162        }
 163
 164        if (opts->allow_ff)
 165                verify_opt_compatible(me, "--ff",
 166                                "--signoff", opts->signoff,
 167                                "--no-commit", opts->no_commit,
 168                                "-x", opts->record_origin,
 169                                "--edit", opts->edit,
 170                                NULL);
 171
 172        if (cmd) {
 173                opts->revs = NULL;
 174        } else {
 175                struct setup_revision_opt s_r_opt;
 176                opts->revs = xmalloc(sizeof(*opts->revs));
 177                init_revisions(opts->revs, NULL);
 178                opts->revs->no_walk = REVISION_WALK_NO_WALK_UNSORTED;
 179                if (argc < 2)
 180                        usage_with_options(usage_str, options);
 181                if (!strcmp(argv[1], "-"))
 182                        argv[1] = "@{-1}";
 183                memset(&s_r_opt, 0, sizeof(s_r_opt));
 184                s_r_opt.assume_dashdash = 1;
 185                argc = setup_revisions(argc, argv, opts->revs, &s_r_opt);
 186        }
 187
 188        if (argc > 1)
 189                usage_with_options(usage_str, options);
 190
 191        /* These option values will be free()d */
 192        opts->gpg_sign = xstrdup_or_null(opts->gpg_sign);
 193        opts->strategy = xstrdup_or_null(opts->strategy);
 194
 195        if (cmd == 'q') {
 196                int ret = sequencer_remove_state(opts);
 197                if (!ret)
 198                        remove_branch_state();
 199                return ret;
 200        }
 201        if (cmd == 'c')
 202                return sequencer_continue(opts);
 203        if (cmd == 'a')
 204                return sequencer_rollback(opts);
 205        return sequencer_pick_revisions(opts);
 206}
 207
 208int cmd_revert(int argc, const char **argv, const char *prefix)
 209{
 210        struct replay_opts opts = REPLAY_OPTS_INIT;
 211        int res;
 212
 213        if (isatty(0))
 214                opts.edit = 1;
 215        opts.action = REPLAY_REVERT;
 216        sequencer_init_config(&opts);
 217        res = run_sequencer(argc, argv, &opts);
 218        if (res < 0)
 219                die(_("revert failed"));
 220        return res;
 221}
 222
 223int cmd_cherry_pick(int argc, const char **argv, const char *prefix)
 224{
 225        struct replay_opts opts = REPLAY_OPTS_INIT;
 226        int res;
 227
 228        opts.action = REPLAY_PICK;
 229        sequencer_init_config(&opts);
 230        res = run_sequencer(argc, argv, &opts);
 231        if (res < 0)
 232                die(_("cherry-pick failed"));
 233        return res;
 234}