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
   9 /*----- some often used options -----*/
  10
  11 int parse_opt_abbrev_cb(const struct option *opt, const char *arg, int unset)
  12 {
  13         int v;
  14
  15         if (!arg) {
  16                 v = unset ? 0 : DEFAULT_ABBREV;
  17         } else {
  18                 v = strtol(arg, (char **)&arg, 10);
  19                 if (*arg)
  20                         return opterror(opt, "expects a numerical value", 0);
  21                 if (v && v < MINIMUM_ABBREV)
  22                         v = MINIMUM_ABBREV;
  23                 else if (v > 40)
  24                         v = 40;
  25         }
  26         *(int *)(opt->value) = v;
  27         return 0;
  28 }
  29
  30 int parse_opt_approxidate_cb(const struct option *opt, const char *arg,
  31                              int unset)
  32 {
  33         *(unsigned long *)(opt->value) = approxidate(arg);
  34         return 0;
  35 }
  36
  37 int parse_opt_expiry_date_cb(const struct option *opt, const char *arg,
  38                              int unset)
  39 {
  40         return parse_expiry_date(arg, (unsigned long *)opt->value);
  41 }
  42
  43 int parse_opt_color_flag_cb(const struct option *opt, const char *arg,
  44                             int unset)
  45 {
  46         int value;
  47
  48         if (!arg)
  49                 arg = unset ? "never" : (const char *)opt->defval;
  50         value = git_config_colorbool(NULL, arg);
  51         if (value < 0)
  52                 return opterror(opt,
  53                         "expects \"always\", \"auto\", or \"never\"", 0);
  54         *(int *)opt->value = value;
  55         return 0;
  56 }
  57
  58 int parse_opt_verbosity_cb(const struct option *opt, const char *arg,
  59                            int unset)
  60 {
  61         int *target = opt->value;
  62
  63         if (unset)
  64                 /* --no-quiet, --no-verbose */
  65                 *target = 0;
  66         else if (opt->short_name == 'v') {
  67                 if (*target >= 0)
  68                         (*target)++;
  69                 else
  70                         *target = 1;
  71         } else {
  72                 if (*target <= 0)
  73                         (*target)--;
  74                 else
  75                         *target = -1;
  76         }
  77         return 0;
  78 }
  79
  80 int parse_opt_with_commit(const struct option *opt, const char *arg, int unset)
  81 {
  82         unsigned char sha1[20];
  83         struct commit *commit;
  84
  85         if (!arg)
  86                 return -1;
  87         if (get_sha1(arg, sha1))
  88                 return error("malformed object name %s", arg);
  89         commit = lookup_commit_reference(sha1);
  90         if (!commit)
  91                 return error("no such commit %s", arg);
  92         commit_list_insert(commit, opt->value);
  93         return 0;
  94 }
  95
  96 int parse_opt_tertiary(const struct option *opt, const char *arg, int unset)
  97 {
  98         int *target = opt->value;
  99         *target = unset ? 2 : 1;
 100         return 0;
 101 }
 102
 103 int parse_options_concat(struct option *dst, size_t dst_size, struct option *src)
 104 {
 105         int i, j;
 106
 107         for (i = 0; i < dst_size; i++)
 108                 if (dst[i].type == OPTION_END)
 109                         break;
 110         for (j = 0; i < dst_size; i++, j++) {
 111                 dst[i] = src[j];
 112                 if (src[j].type == OPTION_END)
 113                         return 0;
 114         }
 115         return -1;
 116 }
 117
 118 int parse_opt_string_list(const struct option *opt, const char *arg, int unset)
 119 {
 120         struct string_list *v = opt->value;
 121
 122         if (unset) {
 123                 string_list_clear(v, 0);
 124                 return 0;
 125         }
 126
 127         if (!arg)
 128                 return -1;
 129
 130         string_list_append(v, xstrdup(arg));
 131         return 0;
 132 }
 133
 134 int parse_opt_noop_cb(const struct option *opt, const char *arg, int unset)
 135 {
 136         return 0;
 137 }
 138
 139 /**
 140  * Recreates the command-line option in the strbuf.
 141  */
 142 static int recreate_opt(struct strbuf *sb, const struct option *opt,
 143                 const char *arg, int unset)
 144 {
 145         strbuf_reset(sb);
 146
 147         if (opt->long_name) {
 148                 strbuf_addstr(sb, unset ? "--no-" : "--");
 149                 strbuf_addstr(sb, opt->long_name);
 150                 if (arg) {
 151                         strbuf_addch(sb, '=');
 152                         strbuf_addstr(sb, arg);
 153                 }
 154         } else if (opt->short_name && !unset) {
 155                 strbuf_addch(sb, '-');
 156                 strbuf_addch(sb, opt->short_name);
 157                 if (arg)
 158                         strbuf_addstr(sb, arg);
 159         } else
 160                 return -1;
 161
 162         return 0;
 163 }
 164
 165 /**
 166  * For an option opt, recreates the command-line option in opt->value which
 167  * must be an char* initialized to NULL. This is useful when we need to pass
 168  * the command-line option to another command. Since any previous value will be
 169  * overwritten, this callback should only be used for options where the last
 170  * one wins.
 171  */
 172 int parse_opt_passthru(const struct option *opt, const char *arg, int unset)
 173 {
 174         static struct strbuf sb = STRBUF_INIT;
 175         char **opt_value = opt->value;
 176
 177         if (recreate_opt(&sb, opt, arg, unset) < 0)
 178                 return -1;
 179
 180         if (*opt_value)
 181                 free(*opt_value);
 182
 183         *opt_value = strbuf_detach(&sb, NULL);
 184
 185         return 0;
 186 }
 187
 188 /**
 189  * For an option opt, recreate the command-line option, appending it to
 190  * opt->value which must be a argv_array. This is useful when we need to pass
 191  * the command-line option, which can be specified multiple times, to another
 192  * command.
 193  */
 194 int parse_opt_passthru_argv(const struct option *opt, const char *arg, int unset)
 195 {
 196         static struct strbuf sb = STRBUF_INIT;
 197         struct argv_array *opt_value = opt->value;
 198
 199         if (recreate_opt(&sb, opt, arg, unset) < 0)
 200                 return -1;
 201
 202         argv_array_push(opt_value, sb.buf);
 203
 204         return 0;
 205 }