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@xxxxxxxxx>
---
.gitignore | 1 +
Makefile | 1 +
builtin.h | 1 +
builtin/env--helper.c | 95 +++++++++++++++++++++++++++++++++++++++++++
git.c | 1 +
t/t0017-env-helper.sh | 83 +++++++++++++++++++++++++++++++++++++
6 files changed, 182 insertions(+)
create mode 100644 builtin/env--helper.c
create mode 100755 t/t0017-env-helper.sh
diff --git a/.gitignore b/.gitignore
index 4470d7cfc0..1f7a83fb3c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -58,6 +58,7 @@
/git-difftool
/git-difftool--helper
/git-describe
+/git-env--helper
/git-fast-export
/git-fast-import
/git-fetch
diff --git a/Makefile b/Makefile
index f58bf14c7b..f2cfc8d812 100644
--- a/Makefile
+++ b/Makefile
@@ -1059,6 +1059,7 @@ BUILTIN_OBJS += builtin/diff-index.o
BUILTIN_OBJS += builtin/diff-tree.o
BUILTIN_OBJS += builtin/diff.o
BUILTIN_OBJS += builtin/difftool.o
+BUILTIN_OBJS += builtin/env--helper.o
BUILTIN_OBJS += builtin/fast-export.o
BUILTIN_OBJS += builtin/fetch-pack.o
BUILTIN_OBJS += builtin/fetch.o
diff --git a/builtin.h b/builtin.h
index ec7e0954c4..93bd49fe4f 100644
--- a/builtin.h
+++ b/builtin.h
@@ -160,6 +160,7 @@ int cmd_diff_index(int argc, const char **argv, const char *prefix);
int cmd_diff(int argc, const char **argv, const char *prefix);
int cmd_diff_tree(int argc, const char **argv, const char *prefix);
int cmd_difftool(int argc, const char **argv, const char *prefix);
+int cmd_env__helper(int argc, const char **argv, const char *prefix);
int cmd_fast_export(int argc, const char **argv, const char *prefix);
int cmd_fetch(int argc, const char **argv, const char *prefix);
int cmd_fetch_pack(int argc, const char **argv, const char *prefix);
diff --git a/builtin/env--helper.c b/builtin/env--helper.c
new file mode 100644
index 0000000000..1083c0f707
--- /dev/null
+++ b/builtin/env--helper.c
@@ -0,0 +1,95 @@
+#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
+};
+
+enum {
+ ENV_HELPER_TYPE_BOOL = 1,
+ ENV_HELPER_TYPE_ULONG
+} cmdmode = 0;
+
+static int option_parse_type(const struct option *opt, const char *arg,
+ int unset)
+{
+ if (!strcmp(arg, "bool"))
+ cmdmode = ENV_HELPER_TYPE_BOOL;
+ else if (!strcmp(arg, "ulong"))
+ cmdmode = ENV_HELPER_TYPE_ULONG;
+ 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;
+ 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;
+}
diff --git a/git.c b/git.c
index c2eec470c9..a43e1dd98e 100644
--- a/git.c
+++ b/git.c
@@ -500,6 +500,7 @@ static struct cmd_struct commands[] = {
{ "diff-index", cmd_diff_index, RUN_SETUP | NO_PARSEOPT },
{ "diff-tree", cmd_diff_tree, RUN_SETUP | NO_PARSEOPT },
{ "difftool", cmd_difftool, RUN_SETUP_GENTLY },
+ { "env--helper", cmd_env__helper },
{ "fast-export", cmd_fast_export, RUN_SETUP },
{ "fetch", cmd_fetch, RUN_SETUP },
{ "fetch-pack", cmd_fetch_pack, RUN_SETUP | NO_PARSEOPT },
diff --git a/t/t0017-env-helper.sh b/t/t0017-env-helper.sh
new file mode 100755
index 0000000000..709bbbd275
--- /dev/null
+++ b/t/t0017-env-helper.sh
@@ -0,0 +1,83 @@
+#!/bin/sh
+
+test_description='test env--helper'
+
+. ./test-lib.sh
+
+
+test_expect_success 'env--helper usage' '
+ test_must_fail git env--helper &&
+ test_must_fail git env--helper --type=bool &&
+ test_must_fail git env--helper --type=ulong &&
+ test_must_fail git env--helper --type=bool &&
+ test_must_fail git env--helper --type=bool --default &&
+ test_must_fail git env--helper --type=bool --default= &&
+ test_must_fail git env--helper --defaultxyz
+'
+
+test_expect_success 'env--helper bad default values' '
+ test_must_fail git env--helper --type=bool --default=1xyz MISSING &&
+ test_must_fail git env--helper --type=ulong --default=1xyz MISSING
+'
+
+test_expect_success 'env--helper --type=bool' '
+ # Test various --default bool values
+ echo true >expected &&
+ git env--helper --type=bool --default=1 MISSING >actual &&
+ test_cmp expected actual &&
+ git env--helper --type=bool --default=yes MISSING >actual &&
+ test_cmp expected actual &&
+ git env--helper --type=bool --default=true MISSING >actual &&
+ test_cmp expected actual &&
+ echo false >expected &&
+ test_must_fail git env--helper --type=bool --default=0 MISSING >actual &&
+ test_cmp expected actual &&
+ test_must_fail git env--helper --type=bool --default=no MISSING >actual &&
+ test_cmp expected actual &&
+ test_must_fail git env--helper --type=bool --default=false MISSING >actual &&
+ test_cmp expected actual &&
+
+ # No output with --exit-code
+ git env--helper --type=bool --default=true --exit-code MISSING >actual.out 2>actual.err &&
+ test_must_be_empty actual.out &&
+ test_must_be_empty actual.err &&
+ test_must_fail git env--helper --type=bool --default=false --exit-code MISSING >actual.out 2>actual.err &&
+ test_must_be_empty actual.out &&
+ test_must_be_empty actual.err &&
+
+ # Existing variable
+ EXISTS=true git env--helper --type=bool --default=false --exit-code EXISTS >actual.out 2>actual.err &&
+ test_must_be_empty actual.out &&
+ test_must_be_empty actual.err &&
+ test_must_fail \
+ env EXISTS=false \
+ git env--helper --type=bool --default=true --exit-code EXISTS >actual.out 2>actual.err &&
+ test_must_be_empty actual.out &&
+ test_must_be_empty actual.err
+'
+
+test_expect_success 'env--helper --type=ulong' '
+ echo 1234567890 >expected &&
+ git env--helper --type=ulong --default=1234567890 MISSING >actual.out 2>actual.err &&
+ test_cmp expected actual.out &&
+ test_must_be_empty actual.err &&
+
+ echo 0 >expected &&
+ test_must_fail git env--helper --type=ulong --default=0 MISSING >actual &&
+ test_cmp expected actual &&
+
+ git env--helper --type=ulong --default=1234567890 --exit-code MISSING >actual.out 2>actual.err &&
+ test_must_be_empty actual.out &&
+ test_must_be_empty actual.err &&
+
+ EXISTS=1234567890 git env--helper --type=ulong --default=0 EXISTS --exit-code >actual.out 2>actual.err &&
+ test_must_be_empty actual.out &&
+ test_must_be_empty actual.err &&
+
+ echo 1234567890 >expected &&
+ EXISTS=1234567890 git env--helper --type=ulong --default=0 EXISTS >actual.out 2>actual.err &&
+ test_cmp expected actual.out &&
+ test_must_be_empty actual.err
+'
+
+test_done
--
2.22.0.455.g172b71a6c5
