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 "sha1-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                 v = strtol(arg, (char **)&arg, 10);
  20                 if (*arg)
  21                         return error(_("option `%s' expects a numerical value"),
  22                                      opt->long_name);
  23                 if (v && v < MINIMUM_ABBREV)
  24                         v = MINIMUM_ABBREV;
  25                 else if (v > 40)
  26                         v = 40;
  27         }
  28         *(int *)(opt->value) = v;
  29         return 0;
  30 }
  31
  32 int parse_opt_expiry_date_cb(const struct option *opt, const char *arg,
  33                              int unset)
  34 {
  35         if (unset)
  36                 arg = "never";
  37         if (parse_expiry_date(arg, (timestamp_t *)opt->value))
  38                 die(_("malformed expiration date '%s'"), arg);
  39         return 0;
  40 }
  41
  42 int parse_opt_color_flag_cb(const struct option *opt, const char *arg,
  43                             int unset)
  44 {
  45         int value;
  46
  47         if (!arg)
  48                 arg = unset ? "never" : (const char *)opt->defval;
  49         value = git_config_colorbool(NULL, arg);
  50         if (value < 0)
  51                 return error(_("option `%s' expects \"always\", \"auto\", or \"never\""),
  52                              opt->long_name);
  53         *(int *)opt->value = value;
  54         return 0;
  55 }
  56
  57 int parse_opt_verbosity_cb(const struct option *opt, const char *arg,
  58                            int unset)
  59 {
  60         int *target = opt->value;
  61
  62         BUG_ON_OPT_ARG(arg);
  63
  64         if (unset)
  65                 /* --no-quiet, --no-verbose */
  66                 *target = 0;
  67         else if (opt->short_name == 'v') {
  68                 if (*target >= 0)
  69                         (*target)++;
  70                 else
  71                         *target = 1;
  72         } else {
  73                 if (*target <= 0)
  74                         (*target)--;
  75                 else
  76                         *target = -1;
  77         }
  78         return 0;
  79 }
  80
  81 int parse_opt_commits(const struct option *opt, const char *arg, int unset)
  82 {
  83         struct object_id oid;
  84         struct commit *commit;
  85
  86         BUG_ON_OPT_NEG(unset);
  87
  88         if (!arg)
  89                 return -1;
  90         if (get_oid(arg, &oid))
  91                 return error("malformed object name %s", arg);
  92         commit = lookup_commit_reference(the_repository, &oid);
  93         if (!commit)
  94                 return error("no such commit %s", arg);
  95         commit_list_insert(commit, opt->value);
  96         return 0;
  97 }
  98
  99 int parse_opt_object_name(const struct option *opt, const char *arg, int unset)
 100 {
 101         struct object_id oid;
 102
 103         if (unset) {
 104                 oid_array_clear(opt->value);
 105                 return 0;
 106         }
 107         if (!arg)
 108                 return -1;
 109         if (get_oid(arg, &oid))
 110                 return error(_("malformed object name '%s'"), arg);
 111         oid_array_append(opt->value, &oid);
 112         return 0;
 113 }
 114
 115 int parse_opt_tertiary(const struct option *opt, const char *arg, int unset)
 116 {
 117         int *target = opt->value;
 118
 119         BUG_ON_OPT_ARG(arg);
 120
 121         *target = unset ? 2 : 1;
 122         return 0;
 123 }
 124
 125 struct option *parse_options_dup(const struct option *o)
 126 {
 127         struct option *opts;
 128         int nr = 0;
 129
 130         while (o && o->type != OPTION_END) {
 131                 nr++;
 132                 o++;
 133         }
 134
 135         ALLOC_ARRAY(opts, nr + 1);
 136         memcpy(opts, o - nr, sizeof(*o) * nr);
 137         memset(opts + nr, 0, sizeof(*opts));
 138         opts[nr].type = OPTION_END;
 139         return opts;
 140 }
 141
 142 struct option *parse_options_concat(struct option *a, struct option *b)
 143 {
 144         struct option *ret;
 145         size_t i, a_len = 0, b_len = 0;
 146
 147         for (i = 0; a[i].type != OPTION_END; i++)
 148                 a_len++;
 149         for (i = 0; b[i].type != OPTION_END; i++)
 150                 b_len++;
 151
 152         ALLOC_ARRAY(ret, st_add3(a_len, b_len, 1));
 153         for (i = 0; i < a_len; i++)
 154                 ret[i] = a[i];
 155         for (i = 0; i < b_len; i++)
 156                 ret[a_len + i] = b[i];
 157         ret[a_len + b_len] = b[b_len]; /* final OPTION_END */
 158
 159         return ret;
 160 }
 161
 162 int parse_opt_string_list(const struct option *opt, const char *arg, int unset)
 163 {
 164         struct string_list *v = opt->value;
 165
 166         if (unset) {
 167                 string_list_clear(v, 0);
 168                 return 0;
 169         }
 170
 171         if (!arg)
 172                 return -1;
 173
 174         string_list_append(v, arg);
 175         return 0;
 176 }
 177
 178 int parse_opt_noop_cb(const struct option *opt, const char *arg, int unset)
 179 {
 180         return 0;
 181 }
 182
 183 /**
 184  * Report that the option is unknown, so that other code can handle
 185  * it. This can be used as a callback together with
 186  * OPTION_LOWLEVEL_CALLBACK to allow an option to be documented in the
 187  * "-h" output even if it's not being handled directly by
 188  * parse_options().
 189  */
 190 enum parse_opt_result parse_opt_unknown_cb(struct parse_opt_ctx_t *ctx,
 191                                            const struct option *opt,
 192                                            const char *arg, int unset)
 193 {
 194         BUG_ON_OPT_ARG(arg);
 195         return PARSE_OPT_UNKNOWN;
 196 }
 197
 198 /**
 199  * Recreates the command-line option in the strbuf.
 200  */
 201 static int recreate_opt(struct strbuf *sb, const struct option *opt,
 202                 const char *arg, int unset)
 203 {
 204         strbuf_reset(sb);
 205
 206         if (opt->long_name) {
 207                 strbuf_addstr(sb, unset ? "--no-" : "--");
 208                 strbuf_addstr(sb, opt->long_name);
 209                 if (arg) {
 210                         strbuf_addch(sb, '=');
 211                         strbuf_addstr(sb, arg);
 212                 }
 213         } else if (opt->short_name && !unset) {
 214                 strbuf_addch(sb, '-');
 215                 strbuf_addch(sb, opt->short_name);
 216                 if (arg)
 217                         strbuf_addstr(sb, arg);
 218         } else
 219                 return -1;
 220
 221         return 0;
 222 }
 223
 224 /**
 225  * For an option opt, recreates the command-line option in opt->value which
 226  * must be an char* initialized to NULL. This is useful when we need to pass
 227  * the command-line option to another command. Since any previous value will be
 228  * overwritten, this callback should only be used for options where the last
 229  * one wins.
 230  */
 231 int parse_opt_passthru(const struct option *opt, const char *arg, int unset)
 232 {
 233         static struct strbuf sb = STRBUF_INIT;
 234         char **opt_value = opt->value;
 235
 236         if (recreate_opt(&sb, opt, arg, unset) < 0)
 237                 return -1;
 238
 239         free(*opt_value);
 240
 241         *opt_value = strbuf_detach(&sb, NULL);
 242
 243         return 0;
 244 }
 245
 246 /**
 247  * For an option opt, recreate the command-line option, appending it to
 248  * opt->value which must be a argv_array. This is useful when we need to pass
 249  * the command-line option, which can be specified multiple times, to another
 250  * command.
 251  */
 252 int parse_opt_passthru_argv(const struct option *opt, const char *arg, int unset)
 253 {
 254         static struct strbuf sb = STRBUF_INIT;
 255         struct argv_array *opt_value = opt->value;
 256
 257         if (recreate_opt(&sb, opt, arg, unset) < 0)
 258                 return -1;
 259
 260         argv_array_push(opt_value, sb.buf);
 261
 262         return 0;
 263 }