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 "gettext.h"
   8 #include "string-list.h"
   9 #include "strvec.h"
  10 #include "oid-array.h"
  11
  12 /*----- some often used options -----*/
  13
  14 int parse_opt_abbrev_cb(const struct option *opt, const char *arg, int unset)
  15 {
  16         int v;
  17
  18         if (!arg) {
  19                 v = unset ? 0 : DEFAULT_ABBREV;
  20         } else {
  21                 if (!*arg)
  22                         return error(_("option `%s' expects a numerical value"),
  23                                      opt->long_name);
  24                 v = strtol(arg, (char **)&arg, 10);
  25                 if (*arg)
  26                         return error(_("option `%s' expects a numerical value"),
  27                                      opt->long_name);
  28                 if (v && v < MINIMUM_ABBREV)
  29                         v = MINIMUM_ABBREV;
  30                 else if (v > the_hash_algo->hexsz)
  31                         v = the_hash_algo->hexsz;
  32         }
  33         *(int *)(opt->value) = v;
  34         return 0;
  35 }
  36
  37 int parse_opt_expiry_date_cb(const struct option *opt, const char *arg,
  38                              int unset)
  39 {
  40         if (unset)
  41                 arg = "never";
  42         if (parse_expiry_date(arg, (timestamp_t *)opt->value))
  43                 die(_("malformed expiration date '%s'"), arg);
  44         return 0;
  45 }
  46
  47 int parse_opt_color_flag_cb(const struct option *opt, const char *arg,
  48                             int unset)
  49 {
  50         int value;
  51
  52         if (!arg)
  53                 arg = unset ? "never" : (const char *)opt->defval;
  54         value = git_config_colorbool(NULL, arg);
  55         if (value < 0)
  56                 return error(_("option `%s' expects \"always\", \"auto\", or \"never\""),
  57                              opt->long_name);
  58         *(int *)opt->value = value;
  59         return 0;
  60 }
  61
  62 int parse_opt_verbosity_cb(const struct option *opt, const char *arg,
  63                            int unset)
  64 {
  65         int *target = opt->value;
  66
  67         BUG_ON_OPT_ARG(arg);
  68
  69         if (unset)
  70                 /* --no-quiet, --no-verbose */
  71                 *target = 0;
  72         else if (opt->short_name == 'v') {
  73                 if (*target >= 0)
  74                         (*target)++;
  75                 else
  76                         *target = 1;
  77         } else {
  78                 if (*target <= 0)
  79                         (*target)--;
  80                 else
  81                         *target = -1;
  82         }
  83         return 0;
  84 }
  85
  86 int parse_opt_commits(const struct option *opt, const char *arg, int unset)
  87 {
  88         struct object_id oid;
  89         struct commit *commit;
  90
  91         BUG_ON_OPT_NEG(unset);
  92
  93         if (!arg)
  94                 return -1;
  95         if (get_oid(arg, &oid))
  96                 return error("malformed object name %s", arg);
  97         commit = lookup_commit_reference(the_repository, &oid);
  98         if (!commit)
  99                 return error("no such commit %s", arg);
 100         commit_list_insert(commit, opt->value);
 101         return 0;
 102 }
 103
 104 int parse_opt_commit(const struct option *opt, const char *arg, int unset)
 105 {
 106         struct object_id oid;
 107         struct commit *commit;
 108         struct commit **target = opt->value;
 109
 110         BUG_ON_OPT_NEG(unset);
 111
 112         if (!arg)
 113                 return -1;
 114         if (get_oid(arg, &oid))
 115                 return error("malformed object name %s", arg);
 116         commit = lookup_commit_reference(the_repository, &oid);
 117         if (!commit)
 118                 return error("no such commit %s", arg);
 119         *target = commit;
 120         return 0;
 121 }
 122
 123 int parse_opt_object_name(const struct option *opt, const char *arg, int unset)
 124 {
 125         struct object_id oid;
 126
 127         if (unset) {
 128                 oid_array_clear(opt->value);
 129                 return 0;
 130         }
 131         if (!arg)
 132                 return -1;
 133         if (get_oid(arg, &oid))
 134                 return error(_("malformed object name '%s'"), arg);
 135         oid_array_append(opt->value, &oid);
 136         return 0;
 137 }
 138
 139 int parse_opt_object_id(const struct option *opt, const char *arg, int unset)
 140 {
 141         struct object_id oid;
 142         struct object_id *target = opt->value;
 143
 144         if (unset) {
 145                 oidcpy(target, null_oid());
 146                 return 0;
 147         }
 148         if (!arg)
 149                 return -1;
 150         if (get_oid(arg, &oid))
 151                 return error(_("malformed object name '%s'"), arg);
 152         *target = oid;
 153         return 0;
 154 }
 155
 156 int parse_opt_tertiary(const struct option *opt, const char *arg, int unset)
 157 {
 158         int *target = opt->value;
 159
 160         BUG_ON_OPT_ARG(arg);
 161
 162         *target = unset ? 2 : 1;
 163         return 0;
 164 }
 165
 166 static size_t parse_options_count(const struct option *opt)
 167 {
 168         size_t n = 0;
 169
 170         for (; opt && opt->type != OPTION_END; opt++)
 171                 n++;
 172         return n;
 173 }
 174
 175 struct option *parse_options_dup(const struct option *o)
 176 {
 177         struct option no_options[] = { OPT_END() };
 178
 179         return parse_options_concat(o, no_options);
 180 }
 181
 182 struct option *parse_options_concat(const struct option *a,
 183                                     const struct option *b)
 184 {
 185         struct option *ret;
 186         size_t a_len = parse_options_count(a);
 187         size_t b_len = parse_options_count(b);
 188
 189         ALLOC_ARRAY(ret, st_add3(a_len, b_len, 1));
 190         COPY_ARRAY(ret, a, a_len);
 191         COPY_ARRAY(ret + a_len, b, b_len + 1); /* + 1 for final OPTION_END */
 192
 193         return ret;
 194 }
 195
 196 int parse_opt_string_list(const struct option *opt, const char *arg, int unset)
 197 {
 198         struct string_list *v = opt->value;
 199
 200         if (unset) {
 201                 string_list_clear(v, 0);
 202                 return 0;
 203         }
 204
 205         if (!arg)
 206                 return -1;
 207
 208         string_list_append(v, arg);
 209         return 0;
 210 }
 211
 212 int parse_opt_noop_cb(const struct option *opt, const char *arg, int unset)
 213 {
 214         return 0;
 215 }
 216
 217 /**
 218  * Report that the option is unknown, so that other code can handle
 219  * it. This can be used as a callback together with
 220  * OPTION_LOWLEVEL_CALLBACK to allow an option to be documented in the
 221  * "-h" output even if it's not being handled directly by
 222  * parse_options().
 223  */
 224 enum parse_opt_result parse_opt_unknown_cb(struct parse_opt_ctx_t *ctx,
 225                                            const struct option *opt,
 226                                            const char *arg, int unset)
 227 {
 228         BUG_ON_OPT_ARG(arg);
 229         return PARSE_OPT_UNKNOWN;
 230 }
 231
 232 /**
 233  * Recreates the command-line option in the strbuf.
 234  */
 235 static int recreate_opt(struct strbuf *sb, const struct option *opt,
 236                 const char *arg, int unset)
 237 {
 238         strbuf_reset(sb);
 239
 240         if (opt->long_name) {
 241                 strbuf_addstr(sb, unset ? "--no-" : "--");
 242                 strbuf_addstr(sb, opt->long_name);
 243                 if (arg) {
 244                         strbuf_addch(sb, '=');
 245                         strbuf_addstr(sb, arg);
 246                 }
 247         } else if (opt->short_name && !unset) {
 248                 strbuf_addch(sb, '-');
 249                 strbuf_addch(sb, opt->short_name);
 250                 if (arg)
 251                         strbuf_addstr(sb, arg);
 252         } else
 253                 return -1;
 254
 255         return 0;
 256 }
 257
 258 /**
 259  * For an option opt, recreates the command-line option in opt->value which
 260  * must be an char* initialized to NULL. This is useful when we need to pass
 261  * the command-line option to another command. Since any previous value will be
 262  * overwritten, this callback should only be used for options where the last
 263  * one wins.
 264  */
 265 int parse_opt_passthru(const struct option *opt, const char *arg, int unset)
 266 {
 267         static struct strbuf sb = STRBUF_INIT;
 268         char **opt_value = opt->value;
 269
 270         if (recreate_opt(&sb, opt, arg, unset) < 0)
 271                 return -1;
 272
 273         free(*opt_value);
 274
 275         *opt_value = strbuf_detach(&sb, NULL);
 276
 277         return 0;
 278 }
 279
 280 /**
 281  * For an option opt, recreate the command-line option, appending it to
 282  * opt->value which must be a strvec. This is useful when we need to pass
 283  * the command-line option, which can be specified multiple times, to another
 284  * command.
 285  */
 286 int parse_opt_passthru_argv(const struct option *opt, const char *arg, int unset)
 287 {
 288         static struct strbuf sb = STRBUF_INIT;
 289         struct strvec *opt_value = opt->value;
 290
 291         if (recreate_opt(&sb, opt, arg, unset) < 0)
 292                 return -1;
 293
 294         strvec_push(opt_value, sb.buf);
 295
 296         return 0;
 297 }
 298
 299 int parse_opt_tracking_mode(const struct option *opt, const char *arg, int unset)
 300 {
 301         if (unset)
 302                 *(enum branch_track *)opt->value = BRANCH_TRACK_NEVER;
 303         else if (!arg || !strcmp(arg, "direct"))
 304                 *(enum branch_track *)opt->value = BRANCH_TRACK_EXPLICIT;
 305         else if (!strcmp(arg, "inherit"))
 306                 *(enum branch_track *)opt->value = BRANCH_TRACK_INHERIT;
 307         else
 308                 return error(_("option `%s' expects \"%s\" or \"%s\""),
 309                              "--track", "direct", "inherit");
 310
 311         return 0;
 312 }