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 "oid-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 static size_t parse_options_count(const struct option *opt)
 163 {
 164         size_t n = 0;
 165
 166         for (; opt && opt->type != OPTION_END; opt++)
 167                 n++;
 168         return n;
 169 }
 170
 171 struct option *parse_options_dup(const struct option *o)
 172 {
 173         struct option no_options[] = { OPT_END() };
 174
 175         return parse_options_concat(o, no_options);
 176 }
 177
 178 struct option *parse_options_concat(const struct option *a,
 179                                     const struct option *b)
 180 {
 181         struct option *ret;
 182         size_t a_len = parse_options_count(a);
 183         size_t b_len = parse_options_count(b);
 184
 185         ALLOC_ARRAY(ret, st_add3(a_len, b_len, 1));
 186         COPY_ARRAY(ret, a, a_len);
 187         COPY_ARRAY(ret + a_len, b, b_len + 1); /* + 1 for final OPTION_END */
 188
 189         return ret;
 190 }
 191
 192 int parse_opt_string_list(const struct option *opt, const char *arg, int unset)
 193 {
 194         struct string_list *v = opt->value;
 195
 196         if (unset) {
 197                 string_list_clear(v, 0);
 198                 return 0;
 199         }
 200
 201         if (!arg)
 202                 return -1;
 203
 204         string_list_append(v, arg);
 205         return 0;
 206 }
 207
 208 int parse_opt_noop_cb(const struct option *opt, const char *arg, int unset)
 209 {
 210         return 0;
 211 }
 212
 213 /**
 214  * Report that the option is unknown, so that other code can handle
 215  * it. This can be used as a callback together with
 216  * OPTION_LOWLEVEL_CALLBACK to allow an option to be documented in the
 217  * "-h" output even if it's not being handled directly by
 218  * parse_options().
 219  */
 220 enum parse_opt_result parse_opt_unknown_cb(struct parse_opt_ctx_t *ctx,
 221                                            const struct option *opt,
 222                                            const char *arg, int unset)
 223 {
 224         BUG_ON_OPT_ARG(arg);
 225         return PARSE_OPT_UNKNOWN;
 226 }
 227
 228 /**
 229  * Recreates the command-line option in the strbuf.
 230  */
 231 static int recreate_opt(struct strbuf *sb, const struct option *opt,
 232                 const char *arg, int unset)
 233 {
 234         strbuf_reset(sb);
 235
 236         if (opt->long_name) {
 237                 strbuf_addstr(sb, unset ? "--no-" : "--");
 238                 strbuf_addstr(sb, opt->long_name);
 239                 if (arg) {
 240                         strbuf_addch(sb, '=');
 241                         strbuf_addstr(sb, arg);
 242                 }
 243         } else if (opt->short_name && !unset) {
 244                 strbuf_addch(sb, '-');
 245                 strbuf_addch(sb, opt->short_name);
 246                 if (arg)
 247                         strbuf_addstr(sb, arg);
 248         } else
 249                 return -1;
 250
 251         return 0;
 252 }
 253
 254 /**
 255  * For an option opt, recreates the command-line option in opt->value which
 256  * must be an char* initialized to NULL. This is useful when we need to pass
 257  * the command-line option to another command. Since any previous value will be
 258  * overwritten, this callback should only be used for options where the last
 259  * one wins.
 260  */
 261 int parse_opt_passthru(const struct option *opt, const char *arg, int unset)
 262 {
 263         static struct strbuf sb = STRBUF_INIT;
 264         char **opt_value = opt->value;
 265
 266         if (recreate_opt(&sb, opt, arg, unset) < 0)
 267                 return -1;
 268
 269         free(*opt_value);
 270
 271         *opt_value = strbuf_detach(&sb, NULL);
 272
 273         return 0;
 274 }
 275
 276 /**
 277  * For an option opt, recreate the command-line option, appending it to
 278  * opt->value which must be a argv_array. This is useful when we need to pass
 279  * the command-line option, which can be specified multiple times, to another
 280  * command.
 281  */
 282 int parse_opt_passthru_argv(const struct option *opt, const char *arg, int unset)
 283 {
 284         static struct strbuf sb = STRBUF_INIT;
 285         struct argv_array *opt_value = opt->value;
 286
 287         if (recreate_opt(&sb, opt, arg, unset) < 0)
 288                 return -1;
 289
 290         argv_array_push(opt_value, sb.buf);
 291
 292         return 0;
 293 }