parse-options-cb.c

   1 #include "git-compat-util.h"
   2 #include "parse-options.h"
   3 #include "branch.h"
   4 #include "commit.h"
   5 #include "color.h"
   6 #include "environment.h"
   7 #include "gettext.h"
   8 #include "object-name.h"
   9 #include "string-list.h"
  10 #include "strvec.h"
  11 #include "oid-array.h"
  12
  13 /*----- some often used options -----*/
  14
  15 int parse_opt_abbrev_cb(const struct option *opt, const char *arg, int unset)
  16 {
  17         int v;
  18
  19         if (!arg) {
  20                 v = unset ? 0 : DEFAULT_ABBREV;
  21         } else {
  22                 if (!*arg)
  23                         return error(_("option `%s' expects a numerical value"),
  24                                      opt->long_name);
  25                 v = strtol(arg, (char **)&arg, 10);
  26                 if (*arg)
  27                         return error(_("option `%s' expects a numerical value"),
  28                                      opt->long_name);
  29                 if (v && v < MINIMUM_ABBREV)
  30                         v = MINIMUM_ABBREV;
  31                 else if (v > the_hash_algo->hexsz)
  32                         v = the_hash_algo->hexsz;
  33         }
  34         *(int *)(opt->value) = v;
  35         return 0;
  36 }
  37
  38 int parse_opt_expiry_date_cb(const struct option *opt, const char *arg,
  39                              int unset)
  40 {
  41         if (unset)
  42                 arg = "never";
  43         if (parse_expiry_date(arg, (timestamp_t *)opt->value))
  44                 die(_("malformed expiration date '%s'"), arg);
  45         return 0;
  46 }
  47
  48 int parse_opt_color_flag_cb(const struct option *opt, const char *arg,
  49                             int unset)
  50 {
  51         int value;
  52
  53         if (!arg)
  54                 arg = unset ? "never" : (const char *)opt->defval;
  55         value = git_config_colorbool(NULL, arg);
  56         if (value < 0)
  57                 return error(_("option `%s' expects \"always\", \"auto\", or \"never\""),
  58                              opt->long_name);
  59         *(int *)opt->value = value;
  60         return 0;
  61 }
  62
  63 int parse_opt_verbosity_cb(const struct option *opt, const char *arg,
  64                            int unset)
  65 {
  66         int *target = opt->value;
  67
  68         BUG_ON_OPT_ARG(arg);
  69
  70         if (unset)
  71                 /* --no-quiet, --no-verbose */
  72                 *target = 0;
  73         else if (opt->short_name == 'v') {
  74                 if (*target >= 0)
  75                         (*target)++;
  76                 else
  77                         *target = 1;
  78         } else {
  79                 if (*target <= 0)
  80                         (*target)--;
  81                 else
  82                         *target = -1;
  83         }
  84         return 0;
  85 }
  86
  87 int parse_opt_commits(const struct option *opt, const char *arg, int unset)
  88 {
  89         struct object_id oid;
  90         struct commit *commit;
  91
  92         BUG_ON_OPT_NEG(unset);
  93
  94         if (!arg)
  95                 return -1;
  96         if (repo_get_oid(the_repository, arg, &oid))
  97                 return error("malformed object name %s", arg);
  98         commit = lookup_commit_reference(the_repository, &oid);
  99         if (!commit)
 100                 return error("no such commit %s", arg);
 101         commit_list_insert(commit, opt->value);
 102         return 0;
 103 }
 104
 105 int parse_opt_commit(const struct option *opt, const char *arg, int unset)
 106 {
 107         struct object_id oid;
 108         struct commit *commit;
 109         struct commit **target = opt->value;
 110
 111         BUG_ON_OPT_NEG(unset);
 112
 113         if (!arg)
 114                 return -1;
 115         if (repo_get_oid(the_repository, arg, &oid))
 116                 return error("malformed object name %s", arg);
 117         commit = lookup_commit_reference(the_repository, &oid);
 118         if (!commit)
 119                 return error("no such commit %s", arg);
 120         *target = commit;
 121         return 0;
 122 }
 123
 124 int parse_opt_object_name(const struct option *opt, const char *arg, int unset)
 125 {
 126         struct object_id oid;
 127
 128         if (unset) {
 129                 oid_array_clear(opt->value);
 130                 return 0;
 131         }
 132         if (!arg)
 133                 return -1;
 134         if (repo_get_oid(the_repository, arg, &oid))
 135                 return error(_("malformed object name '%s'"), arg);
 136         oid_array_append(opt->value, &oid);
 137         return 0;
 138 }
 139
 140 int parse_opt_object_id(const struct option *opt, const char *arg, int unset)
 141 {
 142         struct object_id oid;
 143         struct object_id *target = opt->value;
 144
 145         if (unset) {
 146                 oidcpy(target, null_oid());
 147                 return 0;
 148         }
 149         if (!arg)
 150                 return -1;
 151         if (repo_get_oid(the_repository, arg, &oid))
 152                 return error(_("malformed object name '%s'"), arg);
 153         *target = oid;
 154         return 0;
 155 }
 156
 157 int parse_opt_tertiary(const struct option *opt, const char *arg, int unset)
 158 {
 159         int *target = opt->value;
 160
 161         BUG_ON_OPT_ARG(arg);
 162
 163         *target = unset ? 2 : 1;
 164         return 0;
 165 }
 166
 167 static size_t parse_options_count(const struct option *opt)
 168 {
 169         size_t n = 0;
 170
 171         for (; opt && opt->type != OPTION_END; opt++)
 172                 n++;
 173         return n;
 174 }
 175
 176 struct option *parse_options_dup(const struct option *o)
 177 {
 178         struct option no_options[] = { OPT_END() };
 179
 180         return parse_options_concat(o, no_options);
 181 }
 182
 183 struct option *parse_options_concat(const struct option *a,
 184                                     const struct option *b)
 185 {
 186         struct option *ret;
 187         size_t a_len = parse_options_count(a);
 188         size_t b_len = parse_options_count(b);
 189
 190         ALLOC_ARRAY(ret, st_add3(a_len, b_len, 1));
 191         COPY_ARRAY(ret, a, a_len);
 192         COPY_ARRAY(ret + a_len, b, b_len + 1); /* + 1 for final OPTION_END */
 193
 194         return ret;
 195 }
 196
 197 int parse_opt_string_list(const struct option *opt, const char *arg, int unset)
 198 {
 199         struct string_list *v = opt->value;
 200
 201         if (unset) {
 202                 string_list_clear(v, 0);
 203                 return 0;
 204         }
 205
 206         if (!arg)
 207                 return -1;
 208
 209         string_list_append(v, arg);
 210         return 0;
 211 }
 212
 213 int parse_opt_noop_cb(const struct option *opt, const char *arg, int unset)
 214 {
 215         return 0;
 216 }
 217
 218 /**
 219  * Report that the option is unknown, so that other code can handle
 220  * it. This can be used as a callback together with
 221  * OPTION_LOWLEVEL_CALLBACK to allow an option to be documented in the
 222  * "-h" output even if it's not being handled directly by
 223  * parse_options().
 224  */
 225 enum parse_opt_result parse_opt_unknown_cb(struct parse_opt_ctx_t *ctx,
 226                                            const struct option *opt,
 227                                            const char *arg, int unset)
 228 {
 229         BUG_ON_OPT_ARG(arg);
 230         return PARSE_OPT_UNKNOWN;
 231 }
 232
 233 /**
 234  * Recreates the command-line option in the strbuf.
 235  */
 236 static int recreate_opt(struct strbuf *sb, const struct option *opt,
 237                 const char *arg, int unset)
 238 {
 239         strbuf_reset(sb);
 240
 241         if (opt->long_name) {
 242                 strbuf_addstr(sb, unset ? "--no-" : "--");
 243                 strbuf_addstr(sb, opt->long_name);
 244                 if (arg) {
 245                         strbuf_addch(sb, '=');
 246                         strbuf_addstr(sb, arg);
 247                 }
 248         } else if (opt->short_name && !unset) {
 249                 strbuf_addch(sb, '-');
 250                 strbuf_addch(sb, opt->short_name);
 251                 if (arg)
 252                         strbuf_addstr(sb, arg);
 253         } else
 254                 return -1;
 255
 256         return 0;
 257 }
 258
 259 /**
 260  * For an option opt, recreates the command-line option in opt->value which
 261  * must be an char* initialized to NULL. This is useful when we need to pass
 262  * the command-line option to another command. Since any previous value will be
 263  * overwritten, this callback should only be used for options where the last
 264  * one wins.
 265  */
 266 int parse_opt_passthru(const struct option *opt, const char *arg, int unset)
 267 {
 268         static struct strbuf sb = STRBUF_INIT;
 269         char **opt_value = opt->value;
 270
 271         if (recreate_opt(&sb, opt, arg, unset) < 0)
 272                 return -1;
 273
 274         free(*opt_value);
 275
 276         *opt_value = strbuf_detach(&sb, NULL);
 277
 278         return 0;
 279 }
 280
 281 /**
 282  * For an option opt, recreate the command-line option, appending it to
 283  * opt->value which must be a strvec. This is useful when we need to pass
 284  * the command-line option, which can be specified multiple times, to another
 285  * command.
 286  */
 287 int parse_opt_passthru_argv(const struct option *opt, const char *arg, int unset)
 288 {
 289         static struct strbuf sb = STRBUF_INIT;
 290         struct strvec *opt_value = opt->value;
 291
 292         if (recreate_opt(&sb, opt, arg, unset) < 0)
 293                 return -1;
 294
 295         strvec_push(opt_value, sb.buf);
 296
 297         return 0;
 298 }
 299
 300 int parse_opt_tracking_mode(const struct option *opt, const char *arg, int unset)
 301 {
 302         if (unset)
 303                 *(enum branch_track *)opt->value = BRANCH_TRACK_NEVER;
 304         else if (!arg || !strcmp(arg, "direct"))
 305                 *(enum branch_track *)opt->value = BRANCH_TRACK_EXPLICIT;
 306         else if (!strcmp(arg, "inherit"))
 307                 *(enum branch_track *)opt->value = BRANCH_TRACK_INHERIT;
 308         else
 309                 return error(_("option `%s' expects \"%s\" or \"%s\""),
 310                              "--track", "direct", "inherit");
 311
 312         return 0;
 313 }