Fix Git config override precedence

Author: hyperupcall

tests/git-authors.bats

@@ -11,13 +11,13 @@ setup() {
 	test_util.cd_test
 
 	git init
-	git config --local user.name test
-	git config --local user.email test@example.com
+	GIT_CONFIG_VALUE_0='test@example.com'
+	GIT_CONFIG_VALUE_1='test'
 	printf '%s\n' 'A' > tmpfile
 	git add .
 	git commit -m 'test: add data A'
-	git config --local user.name testagain
-	git config --local user.email testagain@example.com
+	GIT_CONFIG_VALUE_0='testagain@example.com'
+	GIT_CONFIG_VALUE_1='testagain'
 	printf '%s\n' 'B' > tmpfile
 	git add .
 	git commit -m 'test: add data B'

tests/test_util.sh

@@ -24,3 +24,22 @@ test_util.setup_file() {
 test_util.cd_test() {
 	cd "$BATS_TEST_TMPDIR"
 }
+
+test_util.set_git_config_env() {
+	local -a varkeys=()
+	readarray -t varkeys <(POSIXLY_CORRECT=1 set)
+	for line in "${varkeys[@]}"; do
+		if [[ $line =~ ^(GIT_CONFIG_KEY|GIT_CONFIG_VALUE) ]]; then
+			unset -v "${line%%=*}"
+		fi
+	done
+
+	local -n configobj="$1"
+	local idx=0
+	for key in "${!configobj[@]}"; do
+		export "GIT_CONFIG_KEY_$idx=$key"
+		export "GIT_CONFIG_VALUE_$idx=${configobj[$key]}"
+		((idx += 1))
+	done
+	export GIT_CONFIG_COUNT="${#configobj[@]}"
+}