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
   8 /*----- some often used options -----*/
   9
  10 int parse_opt_abbrev_cb(const struct option *opt, const char *arg, int unset)
  11 {
  12         int v;
  13
  14         if (!arg) {
  15                 v = unset ? 0 : DEFAULT_ABBREV;
  16         } else {
  17                 v = strtol(arg, (char **)&arg, 10);
  18                 if (*arg)
  19                         return opterror(opt, "expects a numerical value", 0);
  20                 if (v && v < MINIMUM_ABBREV)
  21                         v = MINIMUM_ABBREV;
  22                 else if (v > 40)
  23                         v = 40;
  24         }
  25         *(int *)(opt->value) = v;
  26         return 0;
  27 }
  28
  29 int parse_opt_approxidate_cb(const struct option *opt, const char *arg,
  30                              int unset)
  31 {
  32         *(unsigned long *)(opt->value) = approxidate(arg);
  33         return 0;
  34 }
  35
  36 int parse_opt_expiry_date_cb(const struct option *opt, const char *arg,
  37                              int unset)
  38 {
  39         return parse_expiry_date(arg, (unsigned long *)opt->value);
  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 opterror(opt,
  52                         "expects \"always\", \"auto\", or \"never\"", 0);
  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         if (unset)
  63                 /* --no-quiet, --no-verbose */
  64                 *target = 0;
  65         else if (opt->short_name == 'v') {
  66                 if (*target >= 0)
  67                         (*target)++;
  68                 else
  69                         *target = 1;
  70         } else {
  71                 if (*target <= 0)
  72                         (*target)--;
  73                 else
  74                         *target = -1;
  75         }
  76         return 0;
  77 }
  78
  79 int parse_opt_with_commit(const struct option *opt, const char *arg, int unset)
  80 {
  81         unsigned char sha1[20];
  82         struct commit *commit;
  83
  84         if (!arg)
  85                 return -1;
  86         if (get_sha1(arg, sha1))
  87                 return error("malformed object name %s", arg);
  88         commit = lookup_commit_reference(sha1);
  89         if (!commit)
  90                 return error("no such commit %s", arg);
  91         commit_list_insert(commit, opt->value);
  92         return 0;
  93 }
  94
  95 int parse_opt_tertiary(const struct option *opt, const char *arg, int unset)
  96 {
  97         int *target = opt->value;
  98         *target = unset ? 2 : 1;
  99         return 0;
 100 }
 101
 102 int parse_options_concat(struct option *dst, size_t dst_size, struct option *src)
 103 {
 104         int i, j;
 105
 106         for (i = 0; i < dst_size; i++)
 107                 if (dst[i].type == OPTION_END)
 108                         break;
 109         for (j = 0; i < dst_size; i++, j++) {
 110                 dst[i] = src[j];
 111                 if (src[j].type == OPTION_END)
 112                         return 0;
 113         }
 114         return -1;
 115 }
 116
 117 int parse_opt_string_list(const struct option *opt, const char *arg, int unset)
 118 {
 119         struct string_list *v = opt->value;
 120
 121         if (unset) {
 122                 string_list_clear(v, 0);
 123                 return 0;
 124         }
 125
 126         if (!arg)
 127                 return -1;
 128
 129         string_list_append(v, xstrdup(arg));
 130         return 0;
 131 }
 132
 133 int parse_opt_noop_cb(const struct option *opt, const char *arg, int unset)
 134 {
 135         return 0;
 136 }
 137
 138 /**
 139  * Recreates the command-line option in the strbuf.
 140  */
 141 static int recreate_opt(struct strbuf *sb, const struct option *opt,
 142                 const char *arg, int unset)
 143 {
 144         strbuf_reset(sb);
 145
 146         if (opt->long_name) {
 147                 strbuf_addstr(sb, unset ? "--no-" : "--");
 148                 strbuf_addstr(sb, opt->long_name);
 149                 if (arg) {
 150                         strbuf_addch(sb, '=');
 151                         strbuf_addstr(sb, arg);
 152                 }
 153         } else if (opt->short_name && !unset) {
 154                 strbuf_addch(sb, '-');
 155                 strbuf_addch(sb, opt->short_name);
 156                 if (arg)
 157                         strbuf_addstr(sb, arg);
 158         } else
 159                 return -1;
 160
 161         return 0;
 162 }
 163
 164 /**
 165  * For an option opt, recreates the command-line option in opt->value which
 166  * must be an char* initialized to NULL. This is useful when we need to pass
 167  * the command-line option to another command. Since any previous value will be
 168  * overwritten, this callback should only be used for options where the last
 169  * one wins.
 170  */
 171 int parse_opt_passthru(const struct option *opt, const char *arg, int unset)
 172 {
 173         static struct strbuf sb = STRBUF_INIT;
 174         char **opt_value = opt->value;
 175
 176         if (recreate_opt(&sb, opt, arg, unset) < 0)
 177                 return -1;
 178
 179         if (*opt_value)
 180                 free(*opt_value);
 181
 182         *opt_value = strbuf_detach(&sb, NULL);
 183
 184         return 0;
 185 }