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         *(unsigned long *)(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         return parse_expiry_date(arg, (unsigned long *)opt->value);
  42 }
  43
  44 int parse_opt_color_flag_cb(const struct option *opt, const char *arg,
  45                             int unset)
  46 {
  47         int value;
  48
  49         if (!arg)
  50                 arg = unset ? "never" : (const char *)opt->defval;
  51         value = git_config_colorbool(NULL, arg);
  52         if (value < 0)
  53                 return opterror(opt,
  54                         "expects \"always\", \"auto\", or \"never\"", 0);
  55         *(int *)opt->value = value;
  56         return 0;
  57 }
  58
  59 int parse_opt_verbosity_cb(const struct option *opt, const char *arg,
  60                            int unset)
  61 {
  62         int *target = opt->value;
  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         unsigned char sha1[20];
  84         struct commit *commit;
  85
  86         if (!arg)
  87                 return -1;
  88         if (get_sha1(arg, sha1))
  89                 return error("malformed object name %s", arg);
  90         commit = lookup_commit_reference(sha1);
  91         if (!commit)
  92                 return error("no such commit %s", arg);
  93         commit_list_insert(commit, opt->value);
  94         return 0;
  95 }
  96
  97 int parse_opt_object_name(const struct option *opt, const char *arg, int unset)
  98 {
  99         unsigned char sha1[20];
 100
 101         if (unset) {
 102                 sha1_array_clear(opt->value);
 103                 return 0;
 104         }
 105         if (!arg)
 106                 return -1;
 107         if (get_sha1(arg, sha1))
 108                 return error(_("malformed object name '%s'"), arg);
 109         sha1_array_append(opt->value, sha1);
 110         return 0;
 111 }
 112
 113 int parse_opt_tertiary(const struct option *opt, const char *arg, int unset)
 114 {
 115         int *target = opt->value;
 116         *target = unset ? 2 : 1;
 117         return 0;
 118 }
 119
 120 struct option *parse_options_concat(struct option *a, struct option *b)
 121 {
 122         struct option *ret;
 123         size_t i, a_len = 0, b_len = 0;
 124
 125         for (i = 0; a[i].type != OPTION_END; i++)
 126                 a_len++;
 127         for (i = 0; b[i].type != OPTION_END; i++)
 128                 b_len++;
 129
 130         ALLOC_ARRAY(ret, st_add3(a_len, b_len, 1));
 131         for (i = 0; i < a_len; i++)
 132                 ret[i] = a[i];
 133         for (i = 0; i < b_len; i++)
 134                 ret[a_len + i] = b[i];
 135         ret[a_len + b_len] = b[b_len]; /* final OPTION_END */
 136
 137         return ret;
 138 }
 139
 140 int parse_opt_string_list(const struct option *opt, const char *arg, int unset)
 141 {
 142         struct string_list *v = opt->value;
 143
 144         if (unset) {
 145                 string_list_clear(v, 0);
 146                 return 0;
 147         }
 148
 149         if (!arg)
 150                 return -1;
 151
 152         string_list_append(v, arg);
 153         return 0;
 154 }
 155
 156 int parse_opt_noop_cb(const struct option *opt, const char *arg, int unset)
 157 {
 158         return 0;
 159 }
 160
 161 /**
 162  * Report that the option is unknown, so that other code can handle
 163  * it. This can be used as a callback together with
 164  * OPTION_LOWLEVEL_CALLBACK to allow an option to be documented in the
 165  * "-h" output even if it's not being handled directly by
 166  * parse_options().
 167  */
 168 int parse_opt_unknown_cb(const struct option *opt, const char *arg, int unset)
 169 {
 170         return -2;
 171 }
 172
 173 /**
 174  * Recreates the command-line option in the strbuf.
 175  */
 176 static int recreate_opt(struct strbuf *sb, const struct option *opt,
 177                 const char *arg, int unset)
 178 {
 179         strbuf_reset(sb);
 180
 181         if (opt->long_name) {
 182                 strbuf_addstr(sb, unset ? "--no-" : "--");
 183                 strbuf_addstr(sb, opt->long_name);
 184                 if (arg) {
 185                         strbuf_addch(sb, '=');
 186                         strbuf_addstr(sb, arg);
 187                 }
 188         } else if (opt->short_name && !unset) {
 189                 strbuf_addch(sb, '-');
 190                 strbuf_addch(sb, opt->short_name);
 191                 if (arg)
 192                         strbuf_addstr(sb, arg);
 193         } else
 194                 return -1;
 195
 196         return 0;
 197 }
 198
 199 /**
 200  * For an option opt, recreates the command-line option in opt->value which
 201  * must be an char* initialized to NULL. This is useful when we need to pass
 202  * the command-line option to another command. Since any previous value will be
 203  * overwritten, this callback should only be used for options where the last
 204  * one wins.
 205  */
 206 int parse_opt_passthru(const struct option *opt, const char *arg, int unset)
 207 {
 208         static struct strbuf sb = STRBUF_INIT;
 209         char **opt_value = opt->value;
 210
 211         if (recreate_opt(&sb, opt, arg, unset) < 0)
 212                 return -1;
 213
 214         if (*opt_value)
 215                 free(*opt_value);
 216
 217         *opt_value = strbuf_detach(&sb, NULL);
 218
 219         return 0;
 220 }
 221
 222 /**
 223  * For an option opt, recreate the command-line option, appending it to
 224  * opt->value which must be a argv_array. This is useful when we need to pass
 225  * the command-line option, which can be specified multiple times, to another
 226  * command.
 227  */
 228 int parse_opt_passthru_argv(const struct option *opt, const char *arg, int unset)
 229 {
 230         static struct strbuf sb = STRBUF_INIT;
 231         struct argv_array *opt_value = opt->value;
 232
 233         if (recreate_opt(&sb, opt, arg, unset) < 0)
 234                 return -1;
 235
 236         argv_array_push(opt_value, sb.buf);
 237
 238         return 0;
 239 }