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8d2aa8dfac
In the spirit of517fe807d6(assert NOARG/NONEG behavior of parse-options callbacks, 2018-11-05), let's cover some parse-options callbacks which expect to be used with PARSE_OPT_NONEG but don't explicitly assert that this is the case. These callbacks are all used correctly in the current code, but this will help document their expectations and future-proof the code. As a bonus, it also silences -Wunused-parameters (these were added since the initial sweep of517fe807d6, and we can't yet turn on -Wunused-parameters to remind people because it has too many existing false positives). Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
101 lines
2.6 KiB
C
101 lines
2.6 KiB
C
#include "builtin.h"
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#include "config.h"
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#include "parse-options.h"
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static char const * const env__helper_usage[] = {
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N_("git env--helper --type=[bool|ulong] <options> <env-var>"),
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NULL
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};
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enum cmdmode {
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ENV_HELPER_TYPE_BOOL = 1,
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ENV_HELPER_TYPE_ULONG
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};
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static int option_parse_type(const struct option *opt, const char *arg,
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int unset)
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{
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enum cmdmode *cmdmode = opt->value;
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BUG_ON_OPT_NEG(unset);
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if (!strcmp(arg, "bool"))
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*cmdmode = ENV_HELPER_TYPE_BOOL;
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else if (!strcmp(arg, "ulong"))
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*cmdmode = ENV_HELPER_TYPE_ULONG;
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else
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die(_("unrecognized --type argument, %s"), arg);
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return 0;
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}
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int cmd_env__helper(int argc, const char **argv, const char *prefix)
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{
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int exit_code = 0;
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const char *env_variable = NULL;
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const char *env_default = NULL;
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int ret;
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int ret_int, default_int;
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unsigned long ret_ulong, default_ulong;
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enum cmdmode cmdmode = 0;
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struct option opts[] = {
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OPT_CALLBACK_F(0, "type", &cmdmode, N_("type"),
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N_("value is given this type"), PARSE_OPT_NONEG,
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option_parse_type),
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OPT_STRING(0, "default", &env_default, N_("value"),
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N_("default for git_env_*(...) to fall back on")),
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OPT_BOOL(0, "exit-code", &exit_code,
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N_("be quiet only use git_env_*() value as exit code")),
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OPT_END(),
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};
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argc = parse_options(argc, argv, prefix, opts, env__helper_usage,
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PARSE_OPT_KEEP_UNKNOWN);
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if (env_default && !*env_default)
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usage_with_options(env__helper_usage, opts);
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if (!cmdmode)
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usage_with_options(env__helper_usage, opts);
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if (argc != 1)
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usage_with_options(env__helper_usage, opts);
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env_variable = argv[0];
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switch (cmdmode) {
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case ENV_HELPER_TYPE_BOOL:
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if (env_default) {
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default_int = git_parse_maybe_bool(env_default);
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if (default_int == -1) {
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error(_("option `--default' expects a boolean value with `--type=bool`, not `%s`"),
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env_default);
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usage_with_options(env__helper_usage, opts);
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}
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} else {
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default_int = 0;
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}
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ret_int = git_env_bool(env_variable, default_int);
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if (!exit_code)
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puts(ret_int ? "true" : "false");
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ret = ret_int;
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break;
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case ENV_HELPER_TYPE_ULONG:
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if (env_default) {
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if (!git_parse_ulong(env_default, &default_ulong)) {
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error(_("option `--default' expects an unsigned long value with `--type=ulong`, not `%s`"),
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env_default);
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usage_with_options(env__helper_usage, opts);
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}
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} else {
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default_ulong = 0;
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}
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ret_ulong = git_env_ulong(env_variable, default_ulong);
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if (!exit_code)
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printf("%lu\n", ret_ulong);
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ret = ret_ulong;
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break;
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default:
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BUG("unknown <type> value");
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break;
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}
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return !ret;
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}
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