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git-commit-vandalism/builtin/env--helper.c

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env--helper: new undocumented builtin wrapping git_env_*() We have many GIT_TEST_* variables that accept a <boolean> because they're implemented in C, and then some that take <non-empty?> because they're implemented at least partially in shellscript. Add a helper that wraps git_env_bool() and git_env_ulong() as the first step in fixing this. This isn't being added as a test-tool mode because some of these are used outside the test suite. Part of what this tool does can be done via a trick with "git config" added in 83d842dc8c ("tests: turn on network daemon tests by default", 2014-02-10) for test_tristate(), i.e.: git -c magic.variable="$1" config --bool magic.variable 2>/dev/null But as subsequent changes will show being able to pass along the default value makes all the difference, and we'll be able to replace test_tristate() itself with that. The --type=bool option will be used by subsequent patches, but not --type=ulong. I figured it was easy enough to add it & test for it so I left it in so we'd have wrappers for both git_env_*() functions, and to have a template to make it obvious how we'd add --type=int etc. if it's needed in the future. Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-06-21 12:18:06 +02:00
#include "builtin.h"
#include "config.h"
#include "parse-options.h"
static char const * const env__helper_usage[] = {
N_("git env--helper --type=[bool|ulong] <options> <env-var>"),
NULL
};
env--helper: write to opt->value in parseopt helper We use OPT_CALLBACK_F() to call the option_parse_type() callback, passing it the address of "cmdmode" as the value to write to. But the callback doesn't look at opt->value at all, and instead writes to a global variable. This works out because that's the same global variable we happen to pass in, but it's rather confusing. Let's use the passed-in value instead. We'll also make "cmdmode" a local variable of the main function, ensuring we can't make the same mistake again. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-09-30 14:28:32 +02:00
enum cmdmode {
env--helper: new undocumented builtin wrapping git_env_*() We have many GIT_TEST_* variables that accept a <boolean> because they're implemented in C, and then some that take <non-empty?> because they're implemented at least partially in shellscript. Add a helper that wraps git_env_bool() and git_env_ulong() as the first step in fixing this. This isn't being added as a test-tool mode because some of these are used outside the test suite. Part of what this tool does can be done via a trick with "git config" added in 83d842dc8c ("tests: turn on network daemon tests by default", 2014-02-10) for test_tristate(), i.e.: git -c magic.variable="$1" config --bool magic.variable 2>/dev/null But as subsequent changes will show being able to pass along the default value makes all the difference, and we'll be able to replace test_tristate() itself with that. The --type=bool option will be used by subsequent patches, but not --type=ulong. I figured it was easy enough to add it & test for it so I left it in so we'd have wrappers for both git_env_*() functions, and to have a template to make it obvious how we'd add --type=int etc. if it's needed in the future. Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-06-21 12:18:06 +02:00
ENV_HELPER_TYPE_BOOL = 1,
ENV_HELPER_TYPE_ULONG
env--helper: write to opt->value in parseopt helper We use OPT_CALLBACK_F() to call the option_parse_type() callback, passing it the address of "cmdmode" as the value to write to. But the callback doesn't look at opt->value at all, and instead writes to a global variable. This works out because that's the same global variable we happen to pass in, but it's rather confusing. Let's use the passed-in value instead. We'll also make "cmdmode" a local variable of the main function, ensuring we can't make the same mistake again. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-09-30 14:28:32 +02:00
};
env--helper: new undocumented builtin wrapping git_env_*() We have many GIT_TEST_* variables that accept a <boolean> because they're implemented in C, and then some that take <non-empty?> because they're implemented at least partially in shellscript. Add a helper that wraps git_env_bool() and git_env_ulong() as the first step in fixing this. This isn't being added as a test-tool mode because some of these are used outside the test suite. Part of what this tool does can be done via a trick with "git config" added in 83d842dc8c ("tests: turn on network daemon tests by default", 2014-02-10) for test_tristate(), i.e.: git -c magic.variable="$1" config --bool magic.variable 2>/dev/null But as subsequent changes will show being able to pass along the default value makes all the difference, and we'll be able to replace test_tristate() itself with that. The --type=bool option will be used by subsequent patches, but not --type=ulong. I figured it was easy enough to add it & test for it so I left it in so we'd have wrappers for both git_env_*() functions, and to have a template to make it obvious how we'd add --type=int etc. if it's needed in the future. Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-06-21 12:18:06 +02:00
static int option_parse_type(const struct option *opt, const char *arg,
int unset)
{
env--helper: write to opt->value in parseopt helper We use OPT_CALLBACK_F() to call the option_parse_type() callback, passing it the address of "cmdmode" as the value to write to. But the callback doesn't look at opt->value at all, and instead writes to a global variable. This works out because that's the same global variable we happen to pass in, but it's rather confusing. Let's use the passed-in value instead. We'll also make "cmdmode" a local variable of the main function, ensuring we can't make the same mistake again. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-09-30 14:28:32 +02:00
enum cmdmode *cmdmode = opt->value;
assert PARSE_OPT_NONEG in parse-options callbacks In the spirit of 517fe807d6 (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 of 517fe807d6, 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>
2020-09-30 14:29:02 +02:00
BUG_ON_OPT_NEG(unset);
env--helper: new undocumented builtin wrapping git_env_*() We have many GIT_TEST_* variables that accept a <boolean> because they're implemented in C, and then some that take <non-empty?> because they're implemented at least partially in shellscript. Add a helper that wraps git_env_bool() and git_env_ulong() as the first step in fixing this. This isn't being added as a test-tool mode because some of these are used outside the test suite. Part of what this tool does can be done via a trick with "git config" added in 83d842dc8c ("tests: turn on network daemon tests by default", 2014-02-10) for test_tristate(), i.e.: git -c magic.variable="$1" config --bool magic.variable 2>/dev/null But as subsequent changes will show being able to pass along the default value makes all the difference, and we'll be able to replace test_tristate() itself with that. The --type=bool option will be used by subsequent patches, but not --type=ulong. I figured it was easy enough to add it & test for it so I left it in so we'd have wrappers for both git_env_*() functions, and to have a template to make it obvious how we'd add --type=int etc. if it's needed in the future. Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-06-21 12:18:06 +02:00
if (!strcmp(arg, "bool"))
env--helper: write to opt->value in parseopt helper We use OPT_CALLBACK_F() to call the option_parse_type() callback, passing it the address of "cmdmode" as the value to write to. But the callback doesn't look at opt->value at all, and instead writes to a global variable. This works out because that's the same global variable we happen to pass in, but it's rather confusing. Let's use the passed-in value instead. We'll also make "cmdmode" a local variable of the main function, ensuring we can't make the same mistake again. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-09-30 14:28:32 +02:00
*cmdmode = ENV_HELPER_TYPE_BOOL;
env--helper: new undocumented builtin wrapping git_env_*() We have many GIT_TEST_* variables that accept a <boolean> because they're implemented in C, and then some that take <non-empty?> because they're implemented at least partially in shellscript. Add a helper that wraps git_env_bool() and git_env_ulong() as the first step in fixing this. This isn't being added as a test-tool mode because some of these are used outside the test suite. Part of what this tool does can be done via a trick with "git config" added in 83d842dc8c ("tests: turn on network daemon tests by default", 2014-02-10) for test_tristate(), i.e.: git -c magic.variable="$1" config --bool magic.variable 2>/dev/null But as subsequent changes will show being able to pass along the default value makes all the difference, and we'll be able to replace test_tristate() itself with that. The --type=bool option will be used by subsequent patches, but not --type=ulong. I figured it was easy enough to add it & test for it so I left it in so we'd have wrappers for both git_env_*() functions, and to have a template to make it obvious how we'd add --type=int etc. if it's needed in the future. Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-06-21 12:18:06 +02:00
else if (!strcmp(arg, "ulong"))
env--helper: write to opt->value in parseopt helper We use OPT_CALLBACK_F() to call the option_parse_type() callback, passing it the address of "cmdmode" as the value to write to. But the callback doesn't look at opt->value at all, and instead writes to a global variable. This works out because that's the same global variable we happen to pass in, but it's rather confusing. Let's use the passed-in value instead. We'll also make "cmdmode" a local variable of the main function, ensuring we can't make the same mistake again. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-09-30 14:28:32 +02:00
*cmdmode = ENV_HELPER_TYPE_ULONG;
env--helper: new undocumented builtin wrapping git_env_*() We have many GIT_TEST_* variables that accept a <boolean> because they're implemented in C, and then some that take <non-empty?> because they're implemented at least partially in shellscript. Add a helper that wraps git_env_bool() and git_env_ulong() as the first step in fixing this. This isn't being added as a test-tool mode because some of these are used outside the test suite. Part of what this tool does can be done via a trick with "git config" added in 83d842dc8c ("tests: turn on network daemon tests by default", 2014-02-10) for test_tristate(), i.e.: git -c magic.variable="$1" config --bool magic.variable 2>/dev/null But as subsequent changes will show being able to pass along the default value makes all the difference, and we'll be able to replace test_tristate() itself with that. The --type=bool option will be used by subsequent patches, but not --type=ulong. I figured it was easy enough to add it & test for it so I left it in so we'd have wrappers for both git_env_*() functions, and to have a template to make it obvious how we'd add --type=int etc. if it's needed in the future. Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-06-21 12:18:06 +02:00
else
die(_("unrecognized --type argument, %s"), arg);
return 0;
}
int cmd_env__helper(int argc, const char **argv, const char *prefix)
{
int exit_code = 0;
const char *env_variable = NULL;
const char *env_default = NULL;
int ret;
int ret_int, default_int;
unsigned long ret_ulong, default_ulong;
env--helper: write to opt->value in parseopt helper We use OPT_CALLBACK_F() to call the option_parse_type() callback, passing it the address of "cmdmode" as the value to write to. But the callback doesn't look at opt->value at all, and instead writes to a global variable. This works out because that's the same global variable we happen to pass in, but it's rather confusing. Let's use the passed-in value instead. We'll also make "cmdmode" a local variable of the main function, ensuring we can't make the same mistake again. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-09-30 14:28:32 +02:00
enum cmdmode cmdmode = 0;
env--helper: new undocumented builtin wrapping git_env_*() We have many GIT_TEST_* variables that accept a <boolean> because they're implemented in C, and then some that take <non-empty?> because they're implemented at least partially in shellscript. Add a helper that wraps git_env_bool() and git_env_ulong() as the first step in fixing this. This isn't being added as a test-tool mode because some of these are used outside the test suite. Part of what this tool does can be done via a trick with "git config" added in 83d842dc8c ("tests: turn on network daemon tests by default", 2014-02-10) for test_tristate(), i.e.: git -c magic.variable="$1" config --bool magic.variable 2>/dev/null But as subsequent changes will show being able to pass along the default value makes all the difference, and we'll be able to replace test_tristate() itself with that. The --type=bool option will be used by subsequent patches, but not --type=ulong. I figured it was easy enough to add it & test for it so I left it in so we'd have wrappers for both git_env_*() functions, and to have a template to make it obvious how we'd add --type=int etc. if it's needed in the future. Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-06-21 12:18:06 +02:00
struct option opts[] = {
OPT_CALLBACK_F(0, "type", &cmdmode, N_("type"),
N_("value is given this type"), PARSE_OPT_NONEG,
option_parse_type),
OPT_STRING(0, "default", &env_default, N_("value"),
N_("default for git_env_*(...) to fall back on")),
OPT_BOOL(0, "exit-code", &exit_code,
N_("be quiet only use git_env_*() value as exit code")),
OPT_END(),
};
argc = parse_options(argc, argv, prefix, opts, env__helper_usage,
PARSE_OPT_KEEP_UNKNOWN);
if (env_default && !*env_default)
usage_with_options(env__helper_usage, opts);
if (!cmdmode)
usage_with_options(env__helper_usage, opts);
if (argc != 1)
usage_with_options(env__helper_usage, opts);
env_variable = argv[0];
switch (cmdmode) {
case ENV_HELPER_TYPE_BOOL:
if (env_default) {
default_int = git_parse_maybe_bool(env_default);
if (default_int == -1) {
error(_("option `--default' expects a boolean value with `--type=bool`, not `%s`"),
env_default);
usage_with_options(env__helper_usage, opts);
}
} else {
default_int = 0;
}
ret_int = git_env_bool(env_variable, default_int);
if (!exit_code)
puts(ret_int ? "true" : "false");
ret = ret_int;
break;
case ENV_HELPER_TYPE_ULONG:
if (env_default) {
if (!git_parse_ulong(env_default, &default_ulong)) {
error(_("option `--default' expects an unsigned long value with `--type=ulong`, not `%s`"),
env_default);
usage_with_options(env__helper_usage, opts);
}
} else {
default_ulong = 0;
}
ret_ulong = git_env_ulong(env_variable, default_ulong);
if (!exit_code)
printf("%lu\n", ret_ulong);
ret = ret_ulong;
break;
default:
BUG("unknown <type> value");
break;
}
return !ret;
}
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