builtin/revert.c

   1 #include "cache.h"
   2 #include "builtin.h"
   3 #include "parse-options.h"
   4 #include "diff.h"
   5 #include "revision.h"
   6 #include "rerere.h"
   7 #include "dir.h"
   8 #include "sequencer.h"
   9
  10 /*
  11  * This implements the builtins revert and cherry-pick.
  12  *
  13  * Copyright (c) 2007 Johannes E. Schindelin
  14  *
  15  * Based on git-revert.sh, which is
  16  *
  17  * Copyright (c) 2005 Linus Torvalds
  18  * Copyright (c) 2005 Junio C Hamano
  19  */
  20
  21 static const char * const revert_usage[] = {
  22         N_("git revert [options] <commit-ish>"),
  23         N_("git revert <subcommand>"),
  24         NULL
  25 };
  26
  27 static const char * const cherry_pick_usage[] = {
  28         N_("git cherry-pick [options] <commit-ish>"),
  29         N_("git cherry-pick <subcommand>"),
  30         NULL
  31 };
  32
  33 static const char *action_name(const struct replay_opts *opts)
  34 {
  35         return opts->action == REPLAY_REVERT ? "revert" : "cherry-pick";
  36 }
  37
  38 static const char * const *revert_or_cherry_pick_usage(struct replay_opts *opts)
  39 {
  40         return opts->action == REPLAY_REVERT ? revert_usage : cherry_pick_usage;
  41 }
  42
  43 static int option_parse_x(const struct option *opt,
  44                           const char *arg, int unset)
  45 {
  46         struct replay_opts **opts_ptr = opt->value;
  47         struct replay_opts *opts = *opts_ptr;
  48
  49         if (unset)
  50                 return 0;
  51
  52         ALLOC_GROW(opts->xopts, opts->xopts_nr + 1, opts->xopts_alloc);
  53         opts->xopts[opts->xopts_nr++] = xstrdup(arg);
  54         return 0;
  55 }
  56
  57 static void verify_opt_compatible(const char *me, const char *base_opt, ...)
  58 {
  59         const char *this_opt;
  60         va_list ap;
  61
  62         va_start(ap, base_opt);
  63         while ((this_opt = va_arg(ap, const char *))) {
  64                 if (va_arg(ap, int))
  65                         break;
  66         }
  67         va_end(ap);
  68
  69         if (this_opt)
  70                 die(_("%s: %s cannot be used with %s"), me, this_opt, base_opt);
  71 }
  72
  73 static void verify_opt_mutually_compatible(const char *me, ...)
  74 {
  75         const char *opt1, *opt2 = NULL;
  76         va_list ap;
  77
  78         va_start(ap, me);
  79         while ((opt1 = va_arg(ap, const char *))) {
  80                 if (va_arg(ap, int))
  81                         break;
  82         }
  83         if (opt1) {
  84                 while ((opt2 = va_arg(ap, const char *))) {
  85                         if (va_arg(ap, int))
  86                                 break;
  87                 }
  88         }
  89         va_end(ap);
  90
  91         if (opt1 && opt2)
  92                 die(_("%s: %s cannot be used with %s"), me, opt1, opt2);
  93 }
  94
  95 static void parse_args(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 remove_state = 0;
 100         int contin = 0;
 101         int rollback = 0;
 102         struct option options[] = {
 103                 OPT_BOOLEAN(0, "quit", &remove_state, N_("end revert or cherry-pick sequence")),
 104                 OPT_BOOLEAN(0, "continue", &contin, N_("resume revert or cherry-pick sequence")),
 105                 OPT_BOOLEAN(0, "abort", &rollback, N_("cancel revert or cherry-pick sequence")),
 106                 OPT_BOOLEAN('n', "no-commit", &opts->no_commit, N_("don't automatically commit")),
 107                 OPT_BOOLEAN('e', "edit", &opts->edit, N_("edit the commit message")),
 108                 OPT_NOOP_NOARG('r', NULL),
 109                 OPT_BOOLEAN('s', "signoff", &opts->signoff, N_("add Signed-off-by:")),
 110                 OPT_INTEGER('m', "mainline", &opts->mainline, N_("parent number")),
 111                 OPT_RERERE_AUTOUPDATE(&opts->allow_rerere_auto),
 112                 OPT_STRING(0, "strategy", &opts->strategy, N_("strategy"), N_("merge strategy")),
 113                 OPT_CALLBACK('X', "strategy-option", &opts, N_("option"),
 114                         N_("option for merge strategy"), option_parse_x),
 115                 OPT_END(),
 116                 OPT_END(),
 117                 OPT_END(),
 118                 OPT_END(),
 119                 OPT_END(),
 120                 OPT_END(),
 121         };
 122
 123         if (opts->action == REPLAY_PICK) {
 124                 struct option cp_extra[] = {
 125                         OPT_BOOLEAN('x', NULL, &opts->record_origin, N_("append commit name")),
 126                         OPT_BOOLEAN(0, "ff", &opts->allow_ff, N_("allow fast-forward")),
 127                         OPT_BOOLEAN(0, "allow-empty", &opts->allow_empty, N_("preserve initially empty commits")),
 128                         OPT_BOOLEAN(0, "allow-empty-message", &opts->allow_empty_message, N_("allow commits with empty messages")),
 129                         OPT_BOOLEAN(0, "keep-redundant-commits", &opts->keep_redundant_commits, N_("keep redundant, empty commits")),
 130                         OPT_END(),
 131                 };
 132                 if (parse_options_concat(options, ARRAY_SIZE(options), cp_extra))
 133                         die(_("program error"));
 134         }
 135
 136         argc = parse_options(argc, argv, NULL, options, usage_str,
 137                         PARSE_OPT_KEEP_ARGV0 |
 138                         PARSE_OPT_KEEP_UNKNOWN);
 139
 140         /* Check for incompatible subcommands */
 141         verify_opt_mutually_compatible(me,
 142                                 "--quit", remove_state,
 143                                 "--continue", contin,
 144                                 "--abort", rollback,
 145                                 NULL);
 146
 147         /* implies allow_empty */
 148         if (opts->keep_redundant_commits)
 149                 opts->allow_empty = 1;
 150
 151         /* Set the subcommand */
 152         if (remove_state)
 153                 opts->subcommand = REPLAY_REMOVE_STATE;
 154         else if (contin)
 155                 opts->subcommand = REPLAY_CONTINUE;
 156         else if (rollback)
 157                 opts->subcommand = REPLAY_ROLLBACK;
 158         else
 159                 opts->subcommand = REPLAY_NONE;
 160
 161         /* Check for incompatible command line arguments */
 162         if (opts->subcommand != REPLAY_NONE) {
 163                 char *this_operation;
 164                 if (opts->subcommand == REPLAY_REMOVE_STATE)
 165                         this_operation = "--quit";
 166                 else if (opts->subcommand == REPLAY_CONTINUE)
 167                         this_operation = "--continue";
 168                 else {
 169                         assert(opts->subcommand == REPLAY_ROLLBACK);
 170                         this_operation = "--abort";
 171                 }
 172
 173                 verify_opt_compatible(me, this_operation,
 174                                 "--no-commit", opts->no_commit,
 175                                 "--signoff", opts->signoff,
 176                                 "--mainline", opts->mainline,
 177                                 "--strategy", opts->strategy ? 1 : 0,
 178                                 "--strategy-option", opts->xopts ? 1 : 0,
 179                                 "-x", opts->record_origin,
 180                                 "--ff", opts->allow_ff,
 181                                 NULL);
 182         }
 183
 184         if (opts->allow_ff)
 185                 verify_opt_compatible(me, "--ff",
 186                                 "--signoff", opts->signoff,
 187                                 "--no-commit", opts->no_commit,
 188                                 "-x", opts->record_origin,
 189                                 "--edit", opts->edit,
 190                                 NULL);
 191
 192         if (opts->subcommand != REPLAY_NONE) {
 193                 opts->revs = NULL;
 194         } else {
 195                 struct setup_revision_opt s_r_opt;
 196                 opts->revs = xmalloc(sizeof(*opts->revs));
 197                 init_revisions(opts->revs, NULL);
 198                 opts->revs->no_walk = REVISION_WALK_NO_WALK_UNSORTED;
 199                 if (argc < 2)
 200                         usage_with_options(usage_str, options);
 201                 memset(&s_r_opt, 0, sizeof(s_r_opt));
 202                 s_r_opt.assume_dashdash = 1;
 203                 argc = setup_revisions(argc, argv, opts->revs, &s_r_opt);
 204         }
 205
 206         if (argc > 1)
 207                 usage_with_options(usage_str, options);
 208 }
 209
 210 int cmd_revert(int argc, const char **argv, const char *prefix)
 211 {
 212         struct replay_opts opts;
 213         int res;
 214
 215         memset(&opts, 0, sizeof(opts));
 216         if (isatty(0))
 217                 opts.edit = 1;
 218         opts.action = REPLAY_REVERT;
 219         git_config(git_default_config, NULL);
 220         parse_args(argc, argv, &opts);
 221         res = sequencer_pick_revisions(&opts);
 222         if (res < 0)
 223                 die(_("revert failed"));
 224         return res;
 225 }
 226
 227 int cmd_cherry_pick(int argc, const char **argv, const char *prefix)
 228 {
 229         struct replay_opts opts;
 230         int res;
 231
 232         memset(&opts, 0, sizeof(opts));
 233         opts.action = REPLAY_PICK;
 234         git_config(git_default_config, NULL);
 235         parse_args(argc, argv, &opts);
 236         res = sequencer_pick_revisions(&opts);
 237         if (res < 0)
 238                 die(_("cherry-pick failed"));
 239         return res;
 240 }