Andrew's git - gitweb.git/blob - 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
  12int 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 error(_("option `%s' expects a numerical value"),
  22                                     opt->long_name);
  23                if (v && v < MINIMUM_ABBREV)
  24                        v = MINIMUM_ABBREV;
  25                else if (v > 40)
  26                        v = 40;
  27        }
  28        *(int *)(opt->value) = v;
  29        return 0;
  30}
  31
  32int parse_opt_expiry_date_cb(const struct option *opt, const char *arg,
  33                             int unset)
  34{
  35        if (unset)
  36                arg = "never";
  37        if (parse_expiry_date(arg, (timestamp_t *)opt->value))
  38                die(_("malformed expiration date '%s'"), arg);
  39        return 0;
  40}
  41
  42int 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 error(_("option `%s' expects \"always\", \"auto\", or \"never\""),
  52                             opt->long_name);
  53        *(int *)opt->value = value;
  54        return 0;
  55}
  56
  57int parse_opt_verbosity_cb(const struct option *opt, const char *arg,
  58                           int unset)
  59{
  60        int *target = opt->value;
  61
  62        BUG_ON_OPT_ARG(arg);
  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
  81int parse_opt_commits(const struct option *opt, const char *arg, int unset)
  82{
  83        struct object_id oid;
  84        struct commit *commit;
  85
  86        BUG_ON_OPT_NEG(unset);
  87
  88        if (!arg)
  89                return -1;
  90        if (get_oid(arg, &oid))
  91                return error("malformed object name %s", arg);
  92        commit = lookup_commit_reference(the_repository, &oid);
  93        if (!commit)
  94                return error("no such commit %s", arg);
  95        commit_list_insert(commit, opt->value);
  96        return 0;
  97}
  98
  99int parse_opt_object_name(const struct option *opt, const char *arg, int unset)
 100{
 101        struct object_id oid;
 102
 103        if (unset) {
 104                oid_array_clear(opt->value);
 105                return 0;
 106        }
 107        if (!arg)
 108                return -1;
 109        if (get_oid(arg, &oid))
 110                return error(_("malformed object name '%s'"), arg);
 111        oid_array_append(opt->value, &oid);
 112        return 0;
 113}
 114
 115int parse_opt_tertiary(const struct option *opt, const char *arg, int unset)
 116{
 117        int *target = opt->value;
 118
 119        BUG_ON_OPT_ARG(arg);
 120
 121        *target = unset ? 2 : 1;
 122        return 0;
 123}
 124
 125struct option *parse_options_concat(struct option *a, struct option *b)
 126{
 127        struct option *ret;
 128        size_t i, a_len = 0, b_len = 0;
 129
 130        for (i = 0; a[i].type != OPTION_END; i++)
 131                a_len++;
 132        for (i = 0; b[i].type != OPTION_END; i++)
 133                b_len++;
 134
 135        ALLOC_ARRAY(ret, st_add3(a_len, b_len, 1));
 136        for (i = 0; i < a_len; i++)
 137                ret[i] = a[i];
 138        for (i = 0; i < b_len; i++)
 139                ret[a_len + i] = b[i];
 140        ret[a_len + b_len] = b[b_len]; /* final OPTION_END */
 141
 142        return ret;
 143}
 144
 145int parse_opt_string_list(const struct option *opt, const char *arg, int unset)
 146{
 147        struct string_list *v = opt->value;
 148
 149        if (unset) {
 150                string_list_clear(v, 0);
 151                return 0;
 152        }
 153
 154        if (!arg)
 155                return -1;
 156
 157        string_list_append(v, arg);
 158        return 0;
 159}
 160
 161int parse_opt_noop_cb(const struct option *opt, const char *arg, int unset)
 162{
 163        return 0;
 164}
 165
 166/**
 167 * Report that the option is unknown, so that other code can handle
 168 * it. This can be used as a callback together with
 169 * OPTION_LOWLEVEL_CALLBACK to allow an option to be documented in the
 170 * "-h" output even if it's not being handled directly by
 171 * parse_options().
 172 */
 173enum parse_opt_result parse_opt_unknown_cb(struct parse_opt_ctx_t *ctx,
 174                                           const struct option *opt,
 175                                           const char *arg, int unset)
 176{
 177        BUG_ON_OPT_ARG(arg);
 178        return PARSE_OPT_UNKNOWN;
 179}
 180
 181/**
 182 * Recreates the command-line option in the strbuf.
 183 */
 184static int recreate_opt(struct strbuf *sb, const struct option *opt,
 185                const char *arg, int unset)
 186{
 187        strbuf_reset(sb);
 188
 189        if (opt->long_name) {
 190                strbuf_addstr(sb, unset ? "--no-" : "--");
 191                strbuf_addstr(sb, opt->long_name);
 192                if (arg) {
 193                        strbuf_addch(sb, '=');
 194                        strbuf_addstr(sb, arg);
 195                }
 196        } else if (opt->short_name && !unset) {
 197                strbuf_addch(sb, '-');
 198                strbuf_addch(sb, opt->short_name);
 199                if (arg)
 200                        strbuf_addstr(sb, arg);
 201        } else
 202                return -1;
 203
 204        return 0;
 205}
 206
 207/**
 208 * For an option opt, recreates the command-line option in opt->value which
 209 * must be an char* initialized to NULL. This is useful when we need to pass
 210 * the command-line option to another command. Since any previous value will be
 211 * overwritten, this callback should only be used for options where the last
 212 * one wins.
 213 */
 214int parse_opt_passthru(const struct option *opt, const char *arg, int unset)
 215{
 216        static struct strbuf sb = STRBUF_INIT;
 217        char **opt_value = opt->value;
 218
 219        if (recreate_opt(&sb, opt, arg, unset) < 0)
 220                return -1;
 221
 222        free(*opt_value);
 223
 224        *opt_value = strbuf_detach(&sb, NULL);
 225
 226        return 0;
 227}
 228
 229/**
 230 * For an option opt, recreate the command-line option, appending it to
 231 * opt->value which must be a argv_array. This is useful when we need to pass
 232 * the command-line option, which can be specified multiple times, to another
 233 * command.
 234 */
 235int parse_opt_passthru_argv(const struct option *opt, const char *arg, int unset)
 236{
 237        static struct strbuf sb = STRBUF_INIT;
 238        struct argv_array *opt_value = opt->value;
 239
 240        if (recreate_opt(&sb, opt, arg, unset) < 0)
 241                return -1;
 242
 243        argv_array_push(opt_value, sb.buf);
 244
 245        return 0;
 246}