Andrew's git / gitweb.git / parse-options-cb.c
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parse-options-cb.con commit checkout: add simple check for 'git checkout -b' (3136776)
   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_dup(const struct option *o)
 126{
 127        struct option *opts;
 128        int nr = 0;
 129
 130        while (o && o->type != OPTION_END) {
 131                nr++;
 132                o++;
 133        }
 134
 135        ALLOC_ARRAY(opts, nr + 1);
 136        memcpy(opts, o - nr, sizeof(*o) * nr);
 137        memset(opts + nr, 0, sizeof(*opts));
 138        opts[nr].type = OPTION_END;
 139        return opts;
 140}
 141
 142struct option *parse_options_concat(struct option *a, struct option *b)
 143{
 144        struct option *ret;
 145        size_t i, a_len = 0, b_len = 0;
 146
 147        for (i = 0; a[i].type != OPTION_END; i++)
 148                a_len++;
 149        for (i = 0; b[i].type != OPTION_END; i++)
 150                b_len++;
 151
 152        ALLOC_ARRAY(ret, st_add3(a_len, b_len, 1));
 153        for (i = 0; i < a_len; i++)
 154                ret[i] = a[i];
 155        for (i = 0; i < b_len; i++)
 156                ret[a_len + i] = b[i];
 157        ret[a_len + b_len] = b[b_len]; /* final OPTION_END */
 158
 159        return ret;
 160}
 161
 162int parse_opt_string_list(const struct option *opt, const char *arg, int unset)
 163{
 164        struct string_list *v = opt->value;
 165
 166        if (unset) {
 167                string_list_clear(v, 0);
 168                return 0;
 169        }
 170
 171        if (!arg)
 172                return -1;
 173
 174        string_list_append(v, arg);
 175        return 0;
 176}
 177
 178int parse_opt_noop_cb(const struct option *opt, const char *arg, int unset)
 179{
 180        return 0;
 181}
 182
 183/**
 184 * Report that the option is unknown, so that other code can handle
 185 * it. This can be used as a callback together with
 186 * OPTION_LOWLEVEL_CALLBACK to allow an option to be documented in the
 187 * "-h" output even if it's not being handled directly by
 188 * parse_options().
 189 */
 190enum parse_opt_result parse_opt_unknown_cb(struct parse_opt_ctx_t *ctx,
 191                                           const struct option *opt,
 192                                           const char *arg, int unset)
 193{
 194        BUG_ON_OPT_ARG(arg);
 195        return PARSE_OPT_UNKNOWN;
 196}
 197
 198/**
 199 * Recreates the command-line option in the strbuf.
 200 */
 201static int recreate_opt(struct strbuf *sb, const struct option *opt,
 202                const char *arg, int unset)
 203{
 204        strbuf_reset(sb);
 205
 206        if (opt->long_name) {
 207                strbuf_addstr(sb, unset ? "--no-" : "--");
 208                strbuf_addstr(sb, opt->long_name);
 209                if (arg) {
 210                        strbuf_addch(sb, '=');
 211                        strbuf_addstr(sb, arg);
 212                }
 213        } else if (opt->short_name && !unset) {
 214                strbuf_addch(sb, '-');
 215                strbuf_addch(sb, opt->short_name);
 216                if (arg)
 217                        strbuf_addstr(sb, arg);
 218        } else
 219                return -1;
 220
 221        return 0;
 222}
 223
 224/**
 225 * For an option opt, recreates the command-line option in opt->value which
 226 * must be an char* initialized to NULL. This is useful when we need to pass
 227 * the command-line option to another command. Since any previous value will be
 228 * overwritten, this callback should only be used for options where the last
 229 * one wins.
 230 */
 231int parse_opt_passthru(const struct option *opt, const char *arg, int unset)
 232{
 233        static struct strbuf sb = STRBUF_INIT;
 234        char **opt_value = opt->value;
 235
 236        if (recreate_opt(&sb, opt, arg, unset) < 0)
 237                return -1;
 238
 239        free(*opt_value);
 240
 241        *opt_value = strbuf_detach(&sb, NULL);
 242
 243        return 0;
 244}
 245
 246/**
 247 * For an option opt, recreate the command-line option, appending it to
 248 * opt->value which must be a argv_array. This is useful when we need to pass
 249 * the command-line option, which can be specified multiple times, to another
 250 * command.
 251 */
 252int parse_opt_passthru_argv(const struct option *opt, const char *arg, int unset)
 253{
 254        static struct strbuf sb = STRBUF_INIT;
 255        struct argv_array *opt_value = opt->value;
 256
 257        if (recreate_opt(&sb, opt, arg, unset) < 0)
 258                return -1;
 259
 260        argv_array_push(opt_value, sb.buf);
 261
 262        return 0;
 263}