Andrew's git / gitweb.git / parse-options-cb.c
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parse-options-cb.con commit rebase: fix a memory leak (7372eae)
   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_commit(const struct option *opt, const char *arg, int unset)
 100{
 101        struct object_id oid;
 102        struct commit *commit;
 103        struct commit **target = opt->value;
 104
 105        if (!arg)
 106                return -1;
 107        if (get_oid(arg, &oid))
 108                return error("malformed object name %s", arg);
 109        commit = lookup_commit_reference(the_repository, &oid);
 110        if (!commit)
 111                return error("no such commit %s", arg);
 112        *target = commit;
 113        return 0;
 114}
 115
 116int parse_opt_object_name(const struct option *opt, const char *arg, int unset)
 117{
 118        struct object_id oid;
 119
 120        if (unset) {
 121                oid_array_clear(opt->value);
 122                return 0;
 123        }
 124        if (!arg)
 125                return -1;
 126        if (get_oid(arg, &oid))
 127                return error(_("malformed object name '%s'"), arg);
 128        oid_array_append(opt->value, &oid);
 129        return 0;
 130}
 131
 132int parse_opt_object_id(const struct option *opt, const char *arg, int unset)
 133{
 134        struct object_id oid;
 135        struct object_id *target = opt->value;
 136
 137        if (unset) {
 138                *target = null_oid;
 139                return 0;
 140        }
 141        if (!arg)
 142                return -1;
 143        if (get_oid(arg, &oid))
 144                return error(_("malformed object name '%s'"), arg);
 145        *target = oid;
 146        return 0;
 147}
 148
 149int parse_opt_tertiary(const struct option *opt, const char *arg, int unset)
 150{
 151        int *target = opt->value;
 152
 153        BUG_ON_OPT_ARG(arg);
 154
 155        *target = unset ? 2 : 1;
 156        return 0;
 157}
 158
 159struct option *parse_options_concat(struct option *a, struct option *b)
 160{
 161        struct option *ret;
 162        size_t i, a_len = 0, b_len = 0;
 163
 164        for (i = 0; a[i].type != OPTION_END; i++)
 165                a_len++;
 166        for (i = 0; b[i].type != OPTION_END; i++)
 167                b_len++;
 168
 169        ALLOC_ARRAY(ret, st_add3(a_len, b_len, 1));
 170        for (i = 0; i < a_len; i++)
 171                ret[i] = a[i];
 172        for (i = 0; i < b_len; i++)
 173                ret[a_len + i] = b[i];
 174        ret[a_len + b_len] = b[b_len]; /* final OPTION_END */
 175
 176        return ret;
 177}
 178
 179int parse_opt_string_list(const struct option *opt, const char *arg, int unset)
 180{
 181        struct string_list *v = opt->value;
 182
 183        if (unset) {
 184                string_list_clear(v, 0);
 185                return 0;
 186        }
 187
 188        if (!arg)
 189                return -1;
 190
 191        string_list_append(v, arg);
 192        return 0;
 193}
 194
 195int parse_opt_noop_cb(const struct option *opt, const char *arg, int unset)
 196{
 197        return 0;
 198}
 199
 200/**
 201 * Report that the option is unknown, so that other code can handle
 202 * it. This can be used as a callback together with
 203 * OPTION_LOWLEVEL_CALLBACK to allow an option to be documented in the
 204 * "-h" output even if it's not being handled directly by
 205 * parse_options().
 206 */
 207enum parse_opt_result parse_opt_unknown_cb(struct parse_opt_ctx_t *ctx,
 208                                           const struct option *opt,
 209                                           const char *arg, int unset)
 210{
 211        BUG_ON_OPT_ARG(arg);
 212        return PARSE_OPT_UNKNOWN;
 213}
 214
 215/**
 216 * Recreates the command-line option in the strbuf.
 217 */
 218static int recreate_opt(struct strbuf *sb, const struct option *opt,
 219                const char *arg, int unset)
 220{
 221        strbuf_reset(sb);
 222
 223        if (opt->long_name) {
 224                strbuf_addstr(sb, unset ? "--no-" : "--");
 225                strbuf_addstr(sb, opt->long_name);
 226                if (arg) {
 227                        strbuf_addch(sb, '=');
 228                        strbuf_addstr(sb, arg);
 229                }
 230        } else if (opt->short_name && !unset) {
 231                strbuf_addch(sb, '-');
 232                strbuf_addch(sb, opt->short_name);
 233                if (arg)
 234                        strbuf_addstr(sb, arg);
 235        } else
 236                return -1;
 237
 238        return 0;
 239}
 240
 241/**
 242 * For an option opt, recreates the command-line option in opt->value which
 243 * must be an char* initialized to NULL. This is useful when we need to pass
 244 * the command-line option to another command. Since any previous value will be
 245 * overwritten, this callback should only be used for options where the last
 246 * one wins.
 247 */
 248int parse_opt_passthru(const struct option *opt, const char *arg, int unset)
 249{
 250        static struct strbuf sb = STRBUF_INIT;
 251        char **opt_value = opt->value;
 252
 253        if (recreate_opt(&sb, opt, arg, unset) < 0)
 254                return -1;
 255
 256        free(*opt_value);
 257
 258        *opt_value = strbuf_detach(&sb, NULL);
 259
 260        return 0;
 261}
 262
 263/**
 264 * For an option opt, recreate the command-line option, appending it to
 265 * opt->value which must be a argv_array. This is useful when we need to pass
 266 * the command-line option, which can be specified multiple times, to another
 267 * command.
 268 */
 269int parse_opt_passthru_argv(const struct option *opt, const char *arg, int unset)
 270{
 271        static struct strbuf sb = STRBUF_INIT;
 272        struct argv_array *opt_value = opt->value;
 273
 274        if (recreate_opt(&sb, opt, arg, unset) < 0)
 275                return -1;
 276
 277        argv_array_push(opt_value, sb.buf);
 278
 279        return 0;
 280}