config: implement --fixed-value with --get*

The config builtin does its own regex matching of values for the --get,
--get-all, and --get-regexp modes. Plumb the existing 'flags' parameter
to the get_value() method so we can initialize the value-pattern argument
as a fixed string instead of a regex pattern.

Signed-off-by: Derrick Stolee <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: derrickstolee

builtin/config.c

@@ -14,6 +14,7 @@ static const char *const builtin_config_usage[] = {
 
 static char *key;
 static regex_t *key_regexp;
+static const char *value_pattern;
 static regex_t *regexp;
 static int show_keys;
 static int omit_values;
@@ -298,6 +299,8 @@ static int collect_config(const char *key_, const char *value_, void *cb)
 		return 0;
 	if (use_key_regexp && regexec(key_regexp, key_, 0, NULL, 0))
 		return 0;
+	if (fixed_value && strcmp(value_pattern, (value_?value_:"")))
+		return 0;
 	if (regexp != NULL &&
 	    (do_not_match ^ !!regexec(regexp, (value_?value_:""), 0, NULL, 0)))
 		return 0;
@@ -308,7 +311,7 @@ static int collect_config(const char *key_, const char *value_, void *cb)
 	return format_config(&values->items[values->nr++], key_, value_);
 }
 
-static int get_value(const char *key_, const char *regex_)
+static int get_value(const char *key_, const char *regex_, unsigned flags)
 {
 	int ret = CONFIG_GENERIC_ERROR;
 	struct strbuf_list values = {NULL};
@@ -345,7 +348,9 @@ static int get_value(const char *key_, const char *regex_)
 		}
 	}
 
-	if (regex_) {
+	if (regex_ && (flags & CONFIG_FLAGS_FIXED_VALUE))
+		value_pattern = regex_;
+	else if (regex_) {
 		if (regex_[0] == '!') {
 			do_not_match = 1;
 			regex_++;
@@ -890,19 +895,19 @@ int cmd_config(int argc, const char **argv, const char *prefix)
 	}
 	else if (actions == ACTION_GET) {
 		check_argc(argc, 1, 2);
-		return get_value(argv[0], argv[1]);
+		return get_value(argv[0], argv[1], flags);
 	}
 	else if (actions == ACTION_GET_ALL) {
 		do_all = 1;
 		check_argc(argc, 1, 2);
-		return get_value(argv[0], argv[1]);
+		return get_value(argv[0], argv[1], flags);
 	}
 	else if (actions == ACTION_GET_REGEXP) {
 		show_keys = 1;
 		use_key_regexp = 1;
 		do_all = 1;
 		check_argc(argc, 1, 2);
-		return get_value(argv[0], argv[1]);
+		return get_value(argv[0], argv[1], flags);
 	}
 	else if (actions == ACTION_GET_URLMATCH) {
 		check_argc(argc, 2, 2);

t/t1300-config.sh

@@ -2044,4 +2044,26 @@ test_expect_success '--fixed-value uses exact string matching' '
 	test_cmp expect actual
 '
 
+test_expect_success '--get and --get-all with --fixed-value' '
+	test_when_finished rm -f config &&
+	META="a+b*c?d[e]f.g" &&
+	git config --file=config fixed.test bogus &&
+	git config --file=config --add fixed.test "$META" &&
+
+	git config --file=config --get fixed.test bogus &&
+	test_must_fail git config --file=config --get fixed.test "$META" &&
+	git config --file=config --get --fixed-value fixed.test "$META" &&
+	test_must_fail git config --file=config --get --fixed-value fixed.test non-existent &&
+
+	git config --file=config --get-all fixed.test bogus &&
+	test_must_fail git config --file=config --get-all fixed.test "$META" &&
+	git config --file=config --get-all --fixed-value fixed.test "$META" &&
+	test_must_fail git config --file=config --get-all --fixed-value fixed.test non-existent &&
+
+	git config --file=config --get-regexp fixed+ bogus &&
+	test_must_fail git config --file=config --get-regexp fixed+ "$META" &&
+	git config --file=config --get-regexp --fixed-value fixed+ "$META" &&
+	test_must_fail git config --file=config --get-regexp --fixed-value fixed+ non-existent
+'
+
 test_done