parse-options-cb.c

   1 #include "git-compat-util.h"
   2 #include "parse-options.h"
   3 #include "cache.h"
   4 #include "commit.h"
   5 #include "color.h"
   6 #include "string-list.h"
   7 #include "argv-array.h"
   8 #include "sha1-array.h"
   9
  10 /*----- some often used options -----*/
  11
  12 int parse_opt_abbrev_cb(const struct option *opt, const char *arg, int unset)
  13 {
  14         int v;
  15
  16         if (!arg) {
  17                 v = unset ? 0 : DEFAULT_ABBREV;
  18         } else {
  19                 if (!*arg)
  20                         return error(_("option `%s' expects a numerical value"),
  21                                      opt->long_name);
  22                 v = strtol(arg, (char **)&arg, 10);
  23                 if (*arg)
  24                         return error(_("option `%s' expects a numerical value"),
  25                                      opt->long_name);
  26                 if (v && v < MINIMUM_ABBREV)
  27                         v = MINIMUM_ABBREV;
  28                 else if (v > the_hash_algo->hexsz)
  29                         v = the_hash_algo->hexsz;
  30         }
  31         *(int *)(opt->value) = v;
  32         return 0;
  33 }
  34
  35 int parse_opt_expiry_date_cb(const struct option *opt, const char *arg,
  36                              int unset)
  37 {
  38         if (unset)
  39                 arg = "never";
  40         if (parse_expiry_date(arg, (timestamp_t *)opt->value))
  41                 die(_("malformed expiration date '%s'"), arg);
  42         return 0;
  43 }
  44
  45 int parse_opt_color_flag_cb(const struct option *opt, const char *arg,
  46                             int unset)
  47 {
  48         int value;
  49
  50         if (!arg)
  51                 arg = unset ? "never" : (const char *)opt->defval;
  52         value = git_config_colorbool(NULL, arg);
  53         if (value < 0)
  54                 return error(_("option `%s' expects \"always\", \"auto\", or \"never\""),
  55                              opt->long_name);
  56         *(int *)opt->value = value;
  57         return 0;
  58 }
  59
  60 int parse_opt_verbosity_cb(const struct option *opt, const char *arg,
  61                            int unset)
  62 {
  63         int *target = opt->value;
  64
  65         BUG_ON_OPT_ARG(arg);
  66
  67         if (unset)
  68                 /* --no-quiet, --no-verbose */
  69                 *target = 0;
  70         else if (opt->short_name == 'v') {
  71                 if (*target >= 0)
  72                         (*target)++;
  73                 else
  74                         *target = 1;
  75         } else {
  76                 if (*target <= 0)
  77                         (*target)--;
  78                 else
  79                         *target = -1;
  80         }
  81         return 0;
  82 }
  83
  84 int parse_opt_commits(const struct option *opt, const char *arg, int unset)
  85 {
  86         struct object_id oid;
  87         struct commit *commit;
  88
  89         BUG_ON_OPT_NEG(unset);
  90
  91         if (!arg)
  92                 return -1;
  93         if (get_oid(arg, &oid))
  94                 return error("malformed object name %s", arg);
  95         commit = lookup_commit_reference(the_repository, &oid);
  96         if (!commit)
  97                 return error("no such commit %s", arg);
  98         commit_list_insert(commit, opt->value);
  99         return 0;
 100 }
 101
 102 int parse_opt_commit(const struct option *opt, const char *arg, int unset)
 103 {
 104         struct object_id oid;
 105         struct commit *commit;
 106         struct commit **target = opt->value;
 107
 108         if (!arg)
 109                 return -1;
 110         if (get_oid(arg, &oid))
 111                 return error("malformed object name %s", arg);
 112         commit = lookup_commit_reference(the_repository, &oid);
 113         if (!commit)
 114                 return error("no such commit %s", arg);
 115         *target = commit;
 116         return 0;
 117 }
 118
 119 int parse_opt_object_name(const struct option *opt, const char *arg, int unset)
 120 {
 121         struct object_id oid;
 122
 123         if (unset) {
 124                 oid_array_clear(opt->value);
 125                 return 0;
 126         }
 127         if (!arg)
 128                 return -1;
 129         if (get_oid(arg, &oid))
 130                 return error(_("malformed object name '%s'"), arg);
 131         oid_array_append(opt->value, &oid);
 132         return 0;
 133 }
 134
 135 int parse_opt_object_id(const struct option *opt, const char *arg, int unset)
 136 {
 137         struct object_id oid;
 138         struct object_id *target = opt->value;
 139
 140         if (unset) {
 141                 *target = null_oid;
 142                 return 0;
 143         }
 144         if (!arg)
 145                 return -1;
 146         if (get_oid(arg, &oid))
 147                 return error(_("malformed object name '%s'"), arg);
 148         *target = oid;
 149         return 0;
 150 }
 151
 152 int parse_opt_tertiary(const struct option *opt, const char *arg, int unset)
 153 {
 154         int *target = opt->value;
 155
 156         BUG_ON_OPT_ARG(arg);
 157
 158         *target = unset ? 2 : 1;
 159         return 0;
 160 }
 161
 162 struct option *parse_options_dup(const struct option *o)
 163 {
 164         struct option *opts;
 165         int nr = 0;
 166
 167         while (o && o->type != OPTION_END) {
 168                 nr++;
 169                 o++;
 170         }
 171
 172         ALLOC_ARRAY(opts, nr + 1);
 173         memcpy(opts, o - nr, sizeof(*o) * nr);
 174         memset(opts + nr, 0, sizeof(*opts));
 175         opts[nr].type = OPTION_END;
 176         return opts;
 177 }
 178
 179 struct option *parse_options_concat(struct option *a, struct option *b)
 180 {
 181         struct option *ret;
 182         size_t i, a_len = 0, b_len = 0;
 183
 184         for (i = 0; a[i].type != OPTION_END; i++)
 185                 a_len++;
 186         for (i = 0; b[i].type != OPTION_END; i++)
 187                 b_len++;
 188
 189         ALLOC_ARRAY(ret, st_add3(a_len, b_len, 1));
 190         for (i = 0; i < a_len; i++)
 191                 ret[i] = a[i];
 192         for (i = 0; i < b_len; i++)
 193                 ret[a_len + i] = b[i];
 194         ret[a_len + b_len] = b[b_len]; /* final OPTION_END */
 195
 196         return ret;
 197 }
 198
 199 int parse_opt_string_list(const struct option *opt, const char *arg, int unset)
 200 {
 201         struct string_list *v = opt->value;
 202
 203         if (unset) {
 204                 string_list_clear(v, 0);
 205                 return 0;
 206         }
 207
 208         if (!arg)
 209                 return -1;
 210
 211         string_list_append(v, arg);
 212         return 0;
 213 }
 214
 215 int parse_opt_noop_cb(const struct option *opt, const char *arg, int unset)
 216 {
 217         return 0;
 218 }
 219
 220 /**
 221  * Report that the option is unknown, so that other code can handle
 222  * it. This can be used as a callback together with
 223  * OPTION_LOWLEVEL_CALLBACK to allow an option to be documented in the
 224  * "-h" output even if it's not being handled directly by
 225  * parse_options().
 226  */
 227 enum parse_opt_result parse_opt_unknown_cb(struct parse_opt_ctx_t *ctx,
 228                                            const struct option *opt,
 229                                            const char *arg, int unset)
 230 {
 231         BUG_ON_OPT_ARG(arg);
 232         return PARSE_OPT_UNKNOWN;
 233 }
 234
 235 /**
 236  * Recreates the command-line option in the strbuf.
 237  */
 238 static int recreate_opt(struct strbuf *sb, const struct option *opt,
 239                 const char *arg, int unset)
 240 {
 241         strbuf_reset(sb);
 242
 243         if (opt->long_name) {
 244                 strbuf_addstr(sb, unset ? "--no-" : "--");
 245                 strbuf_addstr(sb, opt->long_name);
 246                 if (arg) {
 247                         strbuf_addch(sb, '=');
 248                         strbuf_addstr(sb, arg);
 249                 }
 250         } else if (opt->short_name && !unset) {
 251                 strbuf_addch(sb, '-');
 252                 strbuf_addch(sb, opt->short_name);
 253                 if (arg)
 254                         strbuf_addstr(sb, arg);
 255         } else
 256                 return -1;
 257
 258         return 0;
 259 }
 260
 261 /**
 262  * For an option opt, recreates the command-line option in opt->value which
 263  * must be an char* initialized to NULL. This is useful when we need to pass
 264  * the command-line option to another command. Since any previous value will be
 265  * overwritten, this callback should only be used for options where the last
 266  * one wins.
 267  */
 268 int parse_opt_passthru(const struct option *opt, const char *arg, int unset)
 269 {
 270         static struct strbuf sb = STRBUF_INIT;
 271         char **opt_value = opt->value;
 272
 273         if (recreate_opt(&sb, opt, arg, unset) < 0)
 274                 return -1;
 275
 276         free(*opt_value);
 277
 278         *opt_value = strbuf_detach(&sb, NULL);
 279
 280         return 0;
 281 }
 282
 283 /**
 284  * For an option opt, recreate the command-line option, appending it to
 285  * opt->value which must be a argv_array. This is useful when we need to pass
 286  * the command-line option, which can be specified multiple times, to another
 287  * command.
 288  */
 289 int parse_opt_passthru_argv(const struct option *opt, const char *arg, int unset)
 290 {
 291         static struct strbuf sb = STRBUF_INIT;
 292         struct argv_array *opt_value = opt->value;
 293
 294         if (recreate_opt(&sb, opt, arg, unset) < 0)
 295                 return -1;
 296
 297         argv_array_push(opt_value, sb.buf);
 298
 299         return 0;
 300 }