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 "strvec.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         BUG_ON_OPT_NEG(unset);
 109
 110         if (!arg)
 111                 return -1;
 112         if (get_oid(arg, &oid))
 113                 return error("malformed object name %s", arg);
 114         commit = lookup_commit_reference(the_repository, &oid);
 115         if (!commit)
 116                 return error("no such commit %s", arg);
 117         *target = commit;
 118         return 0;
 119 }
 120
 121 int parse_opt_object_name(const struct option *opt, const char *arg, int unset)
 122 {
 123         struct object_id oid;
 124
 125         if (unset) {
 126                 oid_array_clear(opt->value);
 127                 return 0;
 128         }
 129         if (!arg)
 130                 return -1;
 131         if (get_oid(arg, &oid))
 132                 return error(_("malformed object name '%s'"), arg);
 133         oid_array_append(opt->value, &oid);
 134         return 0;
 135 }
 136
 137 int parse_opt_object_id(const struct option *opt, const char *arg, int unset)
 138 {
 139         struct object_id oid;
 140         struct object_id *target = opt->value;
 141
 142         if (unset) {
 143                 *target = null_oid;
 144                 return 0;
 145         }
 146         if (!arg)
 147                 return -1;
 148         if (get_oid(arg, &oid))
 149                 return error(_("malformed object name '%s'"), arg);
 150         *target = oid;
 151         return 0;
 152 }
 153
 154 int parse_opt_tertiary(const struct option *opt, const char *arg, int unset)
 155 {
 156         int *target = opt->value;
 157
 158         BUG_ON_OPT_ARG(arg);
 159
 160         *target = unset ? 2 : 1;
 161         return 0;
 162 }
 163
 164 static size_t parse_options_count(const struct option *opt)
 165 {
 166         size_t n = 0;
 167
 168         for (; opt && opt->type != OPTION_END; opt++)
 169                 n++;
 170         return n;
 171 }
 172
 173 struct option *parse_options_dup(const struct option *o)
 174 {
 175         struct option no_options[] = { OPT_END() };
 176
 177         return parse_options_concat(o, no_options);
 178 }
 179
 180 struct option *parse_options_concat(const struct option *a,
 181                                     const struct option *b)
 182 {
 183         struct option *ret;
 184         size_t a_len = parse_options_count(a);
 185         size_t b_len = parse_options_count(b);
 186
 187         ALLOC_ARRAY(ret, st_add3(a_len, b_len, 1));
 188         COPY_ARRAY(ret, a, a_len);
 189         COPY_ARRAY(ret + a_len, b, b_len + 1); /* + 1 for final OPTION_END */
 190
 191         return ret;
 192 }
 193
 194 int parse_opt_string_list(const struct option *opt, const char *arg, int unset)
 195 {
 196         struct string_list *v = opt->value;
 197
 198         if (unset) {
 199                 string_list_clear(v, 0);
 200                 return 0;
 201         }
 202
 203         if (!arg)
 204                 return -1;
 205
 206         string_list_append(v, arg);
 207         return 0;
 208 }
 209
 210 int parse_opt_noop_cb(const struct option *opt, const char *arg, int unset)
 211 {
 212         return 0;
 213 }
 214
 215 /**
 216  * Report that the option is unknown, so that other code can handle
 217  * it. This can be used as a callback together with
 218  * OPTION_LOWLEVEL_CALLBACK to allow an option to be documented in the
 219  * "-h" output even if it's not being handled directly by
 220  * parse_options().
 221  */
 222 enum parse_opt_result parse_opt_unknown_cb(struct parse_opt_ctx_t *ctx,
 223                                            const struct option *opt,
 224                                            const char *arg, int unset)
 225 {
 226         BUG_ON_OPT_ARG(arg);
 227         return PARSE_OPT_UNKNOWN;
 228 }
 229
 230 /**
 231  * Recreates the command-line option in the strbuf.
 232  */
 233 static int recreate_opt(struct strbuf *sb, const struct option *opt,
 234                 const char *arg, int unset)
 235 {
 236         strbuf_reset(sb);
 237
 238         if (opt->long_name) {
 239                 strbuf_addstr(sb, unset ? "--no-" : "--");
 240                 strbuf_addstr(sb, opt->long_name);
 241                 if (arg) {
 242                         strbuf_addch(sb, '=');
 243                         strbuf_addstr(sb, arg);
 244                 }
 245         } else if (opt->short_name && !unset) {
 246                 strbuf_addch(sb, '-');
 247                 strbuf_addch(sb, opt->short_name);
 248                 if (arg)
 249                         strbuf_addstr(sb, arg);
 250         } else
 251                 return -1;
 252
 253         return 0;
 254 }
 255
 256 /**
 257  * For an option opt, recreates the command-line option in opt->value which
 258  * must be an char* initialized to NULL. This is useful when we need to pass
 259  * the command-line option to another command. Since any previous value will be
 260  * overwritten, this callback should only be used for options where the last
 261  * one wins.
 262  */
 263 int parse_opt_passthru(const struct option *opt, const char *arg, int unset)
 264 {
 265         static struct strbuf sb = STRBUF_INIT;
 266         char **opt_value = opt->value;
 267
 268         if (recreate_opt(&sb, opt, arg, unset) < 0)
 269                 return -1;
 270
 271         free(*opt_value);
 272
 273         *opt_value = strbuf_detach(&sb, NULL);
 274
 275         return 0;
 276 }
 277
 278 /**
 279  * For an option opt, recreate the command-line option, appending it to
 280  * opt->value which must be a strvec. This is useful when we need to pass
 281  * the command-line option, which can be specified multiple times, to another
 282  * command.
 283  */
 284 int parse_opt_passthru_argv(const struct option *opt, const char *arg, int unset)
 285 {
 286         static struct strbuf sb = STRBUF_INIT;
 287         struct strvec *opt_value = opt->value;
 288
 289         if (recreate_opt(&sb, opt, arg, unset) < 0)
 290                 return -1;
 291
 292         strvec_push(opt_value, sb.buf);
 293
 294         return 0;
 295 }