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         "git revert [options] <commit-ish>",
  23         "git revert <subcommand>",
  24         NULL
  25 };
  26
  27 static const char * const cherry_pick_usage[] = {
  28         "git cherry-pick [options] <commit-ish>",
  29         "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, "end revert or cherry-pick sequence"),
 104                 OPT_BOOLEAN(0, "continue", &contin, "resume revert or cherry-pick sequence"),
 105                 OPT_BOOLEAN(0, "abort", &rollback, "cancel revert or cherry-pick sequence"),
 106                 OPT_BOOLEAN('n', "no-commit", &opts->no_commit, "don't automatically commit"),
 107                 OPT_BOOLEAN('e', "edit", &opts->edit, "edit the commit message"),
 108                 OPT_NOOP_NOARG('r', NULL),
 109                 OPT_BOOLEAN('s', "signoff", &opts->signoff, "add Signed-off-by:"),
 110                 OPT_INTEGER('m', "mainline", &opts->mainline, "parent number"),
 111                 OPT_RERERE_AUTOUPDATE(&opts->allow_rerere_auto),
 112                 OPT_STRING(0, "strategy", &opts->strategy, "strategy", "merge strategy"),
 113                 OPT_CALLBACK('X', "strategy-option", &opts, "option",
 114                         "option for merge strategy", option_parse_x),
 115                 OPT_END(),
 116                 OPT_END(),
 117                 OPT_END(),
 118                 OPT_END(),
 119                 OPT_END(),
 120         };
 121
 122         if (opts->action == REPLAY_PICK) {
 123                 struct option cp_extra[] = {
 124                         OPT_BOOLEAN('x', NULL, &opts->record_origin, "append commit name"),
 125                         OPT_BOOLEAN(0, "ff", &opts->allow_ff, "allow fast-forward"),
 126                         OPT_BOOLEAN(0, "allow-empty", &opts->allow_empty, "preserve initially empty commits"),
 127                         OPT_BOOLEAN(0, "keep-redundant-commits", &opts->keep_redundant_commits, "keep redundant, empty commits"),
 128                         OPT_END(),
 129                 };
 130                 if (parse_options_concat(options, ARRAY_SIZE(options), cp_extra))
 131                         die(_("program error"));
 132         }
 133
 134         argc = parse_options(argc, argv, NULL, options, usage_str,
 135                         PARSE_OPT_KEEP_ARGV0 |
 136                         PARSE_OPT_KEEP_UNKNOWN);
 137
 138         /* Check for incompatible subcommands */
 139         verify_opt_mutually_compatible(me,
 140                                 "--quit", remove_state,
 141                                 "--continue", contin,
 142                                 "--abort", rollback,
 143                                 NULL);
 144
 145         /* implies allow_empty */
 146         if (opts->keep_redundant_commits)
 147                 opts->allow_empty = 1;
 148
 149         /* Set the subcommand */
 150         if (remove_state)
 151                 opts->subcommand = REPLAY_REMOVE_STATE;
 152         else if (contin)
 153                 opts->subcommand = REPLAY_CONTINUE;
 154         else if (rollback)
 155                 opts->subcommand = REPLAY_ROLLBACK;
 156         else
 157                 opts->subcommand = REPLAY_NONE;
 158
 159         /* Check for incompatible command line arguments */
 160         if (opts->subcommand != REPLAY_NONE) {
 161                 char *this_operation;
 162                 if (opts->subcommand == REPLAY_REMOVE_STATE)
 163                         this_operation = "--quit";
 164                 else if (opts->subcommand == REPLAY_CONTINUE)
 165                         this_operation = "--continue";
 166                 else {
 167                         assert(opts->subcommand == REPLAY_ROLLBACK);
 168                         this_operation = "--abort";
 169                 }
 170
 171                 verify_opt_compatible(me, this_operation,
 172                                 "--no-commit", opts->no_commit,
 173                                 "--signoff", opts->signoff,
 174                                 "--mainline", opts->mainline,
 175                                 "--strategy", opts->strategy ? 1 : 0,
 176                                 "--strategy-option", opts->xopts ? 1 : 0,
 177                                 "-x", opts->record_origin,
 178                                 "--ff", opts->allow_ff,
 179                                 NULL);
 180         }
 181
 182         if (opts->allow_ff)
 183                 verify_opt_compatible(me, "--ff",
 184                                 "--signoff", opts->signoff,
 185                                 "--no-commit", opts->no_commit,
 186                                 "-x", opts->record_origin,
 187                                 "--edit", opts->edit,
 188                                 NULL);
 189
 190         if (opts->subcommand != REPLAY_NONE) {
 191                 opts->revs = NULL;
 192         } else {
 193                 struct setup_revision_opt s_r_opt;
 194                 opts->revs = xmalloc(sizeof(*opts->revs));
 195                 init_revisions(opts->revs, NULL);
 196                 opts->revs->no_walk = REVISION_WALK_NO_WALK_UNSORTED;
 197                 if (argc < 2)
 198                         usage_with_options(usage_str, options);
 199                 memset(&s_r_opt, 0, sizeof(s_r_opt));
 200                 s_r_opt.assume_dashdash = 1;
 201                 argc = setup_revisions(argc, argv, opts->revs, &s_r_opt);
 202         }
 203
 204         if (argc > 1)
 205                 usage_with_options(usage_str, options);
 206 }
 207
 208 int cmd_revert(int argc, const char **argv, const char *prefix)
 209 {
 210         struct replay_opts opts;
 211         int res;
 212
 213         memset(&opts, 0, sizeof(opts));
 214         if (isatty(0))
 215                 opts.edit = 1;
 216         opts.action = REPLAY_REVERT;
 217         git_config(git_default_config, NULL);
 218         parse_args(argc, argv, &opts);
 219         res = sequencer_pick_revisions(&opts);
 220         if (res < 0)
 221                 die(_("revert failed"));
 222         return res;
 223 }
 224
 225 int cmd_cherry_pick(int argc, const char **argv, const char *prefix)
 226 {
 227         struct replay_opts opts;
 228         int res;
 229
 230         memset(&opts, 0, sizeof(opts));
 231         opts.action = REPLAY_PICK;
 232         git_config(git_default_config, NULL);
 233         parse_args(argc, argv, &opts);
 234         res = sequencer_pick_revisions(&opts);
 235         if (res < 0)
 236                 die(_("cherry-pick failed"));
 237         return res;
 238 }