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