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                 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 > 40)
  29                         v = 40;
  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_object_name(const struct option *opt, const char *arg, int unset)
 103 {
 104         struct object_id oid;
 105
 106         if (unset) {
 107                 oid_array_clear(opt->value);
 108                 return 0;
 109         }
 110         if (!arg)
 111                 return -1;
 112         if (get_oid(arg, &oid))
 113                 return error(_("malformed object name '%s'"), arg);
 114         oid_array_append(opt->value, &oid);
 115         return 0;
 116 }
 117
 118 int parse_opt_tertiary(const struct option *opt, const char *arg, int unset)
 119 {
 120         int *target = opt->value;
 121
 122         BUG_ON_OPT_ARG(arg);
 123
 124         *target = unset ? 2 : 1;
 125         return 0;
 126 }
 127
 128 struct option *parse_options_concat(struct option *a, struct option *b)
 129 {
 130         struct option *ret;
 131         size_t i, a_len = 0, b_len = 0;
 132
 133         for (i = 0; a[i].type != OPTION_END; i++)
 134                 a_len++;
 135         for (i = 0; b[i].type != OPTION_END; i++)
 136                 b_len++;
 137
 138         ALLOC_ARRAY(ret, st_add3(a_len, b_len, 1));
 139         for (i = 0; i < a_len; i++)
 140                 ret[i] = a[i];
 141         for (i = 0; i < b_len; i++)
 142                 ret[a_len + i] = b[i];
 143         ret[a_len + b_len] = b[b_len]; /* final OPTION_END */
 144
 145         return ret;
 146 }
 147
 148 int parse_opt_string_list(const struct option *opt, const char *arg, int unset)
 149 {
 150         struct string_list *v = opt->value;
 151
 152         if (unset) {
 153                 string_list_clear(v, 0);
 154                 return 0;
 155         }
 156
 157         if (!arg)
 158                 return -1;
 159
 160         string_list_append(v, arg);
 161         return 0;
 162 }
 163
 164 int parse_opt_noop_cb(const struct option *opt, const char *arg, int unset)
 165 {
 166         return 0;
 167 }
 168
 169 /**
 170  * Report that the option is unknown, so that other code can handle
 171  * it. This can be used as a callback together with
 172  * OPTION_LOWLEVEL_CALLBACK to allow an option to be documented in the
 173  * "-h" output even if it's not being handled directly by
 174  * parse_options().
 175  */
 176 enum parse_opt_result parse_opt_unknown_cb(struct parse_opt_ctx_t *ctx,
 177                                            const struct option *opt,
 178                                            const char *arg, int unset)
 179 {
 180         BUG_ON_OPT_ARG(arg);
 181         return PARSE_OPT_UNKNOWN;
 182 }
 183
 184 /**
 185  * Recreates the command-line option in the strbuf.
 186  */
 187 static int recreate_opt(struct strbuf *sb, const struct option *opt,
 188                 const char *arg, int unset)
 189 {
 190         strbuf_reset(sb);
 191
 192         if (opt->long_name) {
 193                 strbuf_addstr(sb, unset ? "--no-" : "--");
 194                 strbuf_addstr(sb, opt->long_name);
 195                 if (arg) {
 196                         strbuf_addch(sb, '=');
 197                         strbuf_addstr(sb, arg);
 198                 }
 199         } else if (opt->short_name && !unset) {
 200                 strbuf_addch(sb, '-');
 201                 strbuf_addch(sb, opt->short_name);
 202                 if (arg)
 203                         strbuf_addstr(sb, arg);
 204         } else
 205                 return -1;
 206
 207         return 0;
 208 }
 209
 210 /**
 211  * For an option opt, recreates the command-line option in opt->value which
 212  * must be an char* initialized to NULL. This is useful when we need to pass
 213  * the command-line option to another command. Since any previous value will be
 214  * overwritten, this callback should only be used for options where the last
 215  * one wins.
 216  */
 217 int parse_opt_passthru(const struct option *opt, const char *arg, int unset)
 218 {
 219         static struct strbuf sb = STRBUF_INIT;
 220         char **opt_value = opt->value;
 221
 222         if (recreate_opt(&sb, opt, arg, unset) < 0)
 223                 return -1;
 224
 225         free(*opt_value);
 226
 227         *opt_value = strbuf_detach(&sb, NULL);
 228
 229         return 0;
 230 }
 231
 232 /**
 233  * For an option opt, recreate the command-line option, appending it to
 234  * opt->value which must be a argv_array. This is useful when we need to pass
 235  * the command-line option, which can be specified multiple times, to another
 236  * command.
 237  */
 238 int parse_opt_passthru_argv(const struct option *opt, const char *arg, int unset)
 239 {
 240         static struct strbuf sb = STRBUF_INIT;
 241         struct argv_array *opt_value = opt->value;
 242
 243         if (recreate_opt(&sb, opt, arg, unset) < 0)
 244                 return -1;
 245
 246         argv_array_push(opt_value, sb.buf);
 247
 248         return 0;
 249 }