parse-options-cb.c

   1 #include "git-compat-util.h"
   2 #include "parse-options.h"
   3 #include "branch.h"
   4 #include "cache.h"
   5 #include "commit.h"
   6 #include "color.h"
   7 #include "string-list.h"
   8 #include "strvec.h"
   9 #include "oid-array.h"
  10
  11 /*----- some often used options -----*/
  12
  13 int parse_opt_abbrev_cb(const struct option *opt, const char *arg, int unset)
  14 {
  15         int v;
  16
  17         if (!arg) {
  18                 v = unset ? 0 : DEFAULT_ABBREV;
  19         } else {
  20                 if (!*arg)
  21                         return error(_("option `%s' expects a numerical value"),
  22                                      opt->long_name);
  23                 v = strtol(arg, (char **)&arg, 10);
  24                 if (*arg)
  25                         return error(_("option `%s' expects a numerical value"),
  26                                      opt->long_name);
  27                 if (v && v < MINIMUM_ABBREV)
  28                         v = MINIMUM_ABBREV;
  29                 else if (v > the_hash_algo->hexsz)
  30                         v = the_hash_algo->hexsz;
  31         }
  32         *(int *)(opt->value) = v;
  33         return 0;
  34 }
  35
  36 int parse_opt_expiry_date_cb(const struct option *opt, const char *arg,
  37                              int unset)
  38 {
  39         if (unset)
  40                 arg = "never";
  41         if (parse_expiry_date(arg, (timestamp_t *)opt->value))
  42                 die(_("malformed expiration date '%s'"), arg);
  43         return 0;
  44 }
  45
  46 int parse_opt_color_flag_cb(const struct option *opt, const char *arg,
  47                             int unset)
  48 {
  49         int value;
  50
  51         if (!arg)
  52                 arg = unset ? "never" : (const char *)opt->defval;
  53         value = git_config_colorbool(NULL, arg);
  54         if (value < 0)
  55                 return error(_("option `%s' expects \"always\", \"auto\", or \"never\""),
  56                              opt->long_name);
  57         *(int *)opt->value = value;
  58         return 0;
  59 }
  60
  61 int parse_opt_verbosity_cb(const struct option *opt, const char *arg,
  62                            int unset)
  63 {
  64         int *target = opt->value;
  65
  66         BUG_ON_OPT_ARG(arg);
  67
  68         if (unset)
  69                 /* --no-quiet, --no-verbose */
  70                 *target = 0;
  71         else if (opt->short_name == 'v') {
  72                 if (*target >= 0)
  73                         (*target)++;
  74                 else
  75                         *target = 1;
  76         } else {
  77                 if (*target <= 0)
  78                         (*target)--;
  79                 else
  80                         *target = -1;
  81         }
  82         return 0;
  83 }
  84
  85 int parse_opt_commits(const struct option *opt, const char *arg, int unset)
  86 {
  87         struct object_id oid;
  88         struct commit *commit;
  89
  90         BUG_ON_OPT_NEG(unset);
  91
  92         if (!arg)
  93                 return -1;
  94         if (get_oid(arg, &oid))
  95                 return error("malformed object name %s", arg);
  96         commit = lookup_commit_reference(the_repository, &oid);
  97         if (!commit)
  98                 return error("no such commit %s", arg);
  99         commit_list_insert(commit, opt->value);
 100         return 0;
 101 }
 102
 103 int parse_opt_commit(const struct option *opt, const char *arg, int unset)
 104 {
 105         struct object_id oid;
 106         struct commit *commit;
 107         struct commit **target = opt->value;
 108
 109         BUG_ON_OPT_NEG(unset);
 110
 111         if (!arg)
 112                 return -1;
 113         if (get_oid(arg, &oid))
 114                 return error("malformed object name %s", arg);
 115         commit = lookup_commit_reference(the_repository, &oid);
 116         if (!commit)
 117                 return error("no such commit %s", arg);
 118         *target = commit;
 119         return 0;
 120 }
 121
 122 int parse_opt_object_name(const struct option *opt, const char *arg, int unset)
 123 {
 124         struct object_id oid;
 125
 126         if (unset) {
 127                 oid_array_clear(opt->value);
 128                 return 0;
 129         }
 130         if (!arg)
 131                 return -1;
 132         if (get_oid(arg, &oid))
 133                 return error(_("malformed object name '%s'"), arg);
 134         oid_array_append(opt->value, &oid);
 135         return 0;
 136 }
 137
 138 int parse_opt_object_id(const struct option *opt, const char *arg, int unset)
 139 {
 140         struct object_id oid;
 141         struct object_id *target = opt->value;
 142
 143         if (unset) {
 144                 oidcpy(target, null_oid());
 145                 return 0;
 146         }
 147         if (!arg)
 148                 return -1;
 149         if (get_oid(arg, &oid))
 150                 return error(_("malformed object name '%s'"), arg);
 151         *target = oid;
 152         return 0;
 153 }
 154
 155 int parse_opt_tertiary(const struct option *opt, const char *arg, int unset)
 156 {
 157         int *target = opt->value;
 158
 159         BUG_ON_OPT_ARG(arg);
 160
 161         *target = unset ? 2 : 1;
 162         return 0;
 163 }
 164
 165 static size_t parse_options_count(const struct option *opt)
 166 {
 167         size_t n = 0;
 168
 169         for (; opt && opt->type != OPTION_END; opt++)
 170                 n++;
 171         return n;
 172 }
 173
 174 struct option *parse_options_dup(const struct option *o)
 175 {
 176         struct option no_options[] = { OPT_END() };
 177
 178         return parse_options_concat(o, no_options);
 179 }
 180
 181 struct option *parse_options_concat(const struct option *a,
 182                                     const struct option *b)
 183 {
 184         struct option *ret;
 185         size_t a_len = parse_options_count(a);
 186         size_t b_len = parse_options_count(b);
 187
 188         ALLOC_ARRAY(ret, st_add3(a_len, b_len, 1));
 189         COPY_ARRAY(ret, a, a_len);
 190         COPY_ARRAY(ret + a_len, b, b_len + 1); /* + 1 for final OPTION_END */
 191
 192         return ret;
 193 }
 194
 195 int parse_opt_string_list(const struct option *opt, const char *arg, int unset)
 196 {
 197         struct string_list *v = opt->value;
 198
 199         if (unset) {
 200                 string_list_clear(v, 0);
 201                 return 0;
 202         }
 203
 204         if (!arg)
 205                 return -1;
 206
 207         string_list_append(v, arg);
 208         return 0;
 209 }
 210
 211 int parse_opt_noop_cb(const struct option *opt, const char *arg, int unset)
 212 {
 213         return 0;
 214 }
 215
 216 /**
 217  * Report that the option is unknown, so that other code can handle
 218  * it. This can be used as a callback together with
 219  * OPTION_LOWLEVEL_CALLBACK to allow an option to be documented in the
 220  * "-h" output even if it's not being handled directly by
 221  * parse_options().
 222  */
 223 enum parse_opt_result parse_opt_unknown_cb(struct parse_opt_ctx_t *ctx,
 224                                            const struct option *opt,
 225                                            const char *arg, int unset)
 226 {
 227         BUG_ON_OPT_ARG(arg);
 228         return PARSE_OPT_UNKNOWN;
 229 }
 230
 231 /**
 232  * Recreates the command-line option in the strbuf.
 233  */
 234 static int recreate_opt(struct strbuf *sb, const struct option *opt,
 235                 const char *arg, int unset)
 236 {
 237         strbuf_reset(sb);
 238
 239         if (opt->long_name) {
 240                 strbuf_addstr(sb, unset ? "--no-" : "--");
 241                 strbuf_addstr(sb, opt->long_name);
 242                 if (arg) {
 243                         strbuf_addch(sb, '=');
 244                         strbuf_addstr(sb, arg);
 245                 }
 246         } else if (opt->short_name && !unset) {
 247                 strbuf_addch(sb, '-');
 248                 strbuf_addch(sb, opt->short_name);
 249                 if (arg)
 250                         strbuf_addstr(sb, arg);
 251         } else
 252                 return -1;
 253
 254         return 0;
 255 }
 256
 257 /**
 258  * For an option opt, recreates the command-line option in opt->value which
 259  * must be an char* initialized to NULL. This is useful when we need to pass
 260  * the command-line option to another command. Since any previous value will be
 261  * overwritten, this callback should only be used for options where the last
 262  * one wins.
 263  */
 264 int parse_opt_passthru(const struct option *opt, const char *arg, int unset)
 265 {
 266         static struct strbuf sb = STRBUF_INIT;
 267         char **opt_value = opt->value;
 268
 269         if (recreate_opt(&sb, opt, arg, unset) < 0)
 270                 return -1;
 271
 272         free(*opt_value);
 273
 274         *opt_value = strbuf_detach(&sb, NULL);
 275
 276         return 0;
 277 }
 278
 279 /**
 280  * For an option opt, recreate the command-line option, appending it to
 281  * opt->value which must be a strvec. This is useful when we need to pass
 282  * the command-line option, which can be specified multiple times, to another
 283  * command.
 284  */
 285 int parse_opt_passthru_argv(const struct option *opt, const char *arg, int unset)
 286 {
 287         static struct strbuf sb = STRBUF_INIT;
 288         struct strvec *opt_value = opt->value;
 289
 290         if (recreate_opt(&sb, opt, arg, unset) < 0)
 291                 return -1;
 292
 293         strvec_push(opt_value, sb.buf);
 294
 295         return 0;
 296 }
 297
 298 int parse_opt_tracking_mode(const struct option *opt, const char *arg, int unset)
 299 {
 300         if (unset)
 301                 *(enum branch_track *)opt->value = BRANCH_TRACK_NEVER;
 302         else if (!arg || !strcmp(arg, "direct"))
 303                 *(enum branch_track *)opt->value = BRANCH_TRACK_EXPLICIT;
 304         else if (!strcmp(arg, "inherit"))
 305                 *(enum branch_track *)opt->value = BRANCH_TRACK_INHERIT;
 306         else
 307                 return error(_("option `%s' expects \"%s\" or \"%s\""),
 308                              "--track", "direct", "inherit");
 309
 310         return 0;
 311 }