Move external tests files to tests/external/

test/external/.gitignore

@@ -0,0 +1,2 @@
+# All of the cloned external repos.
+/*/

test/external/fetch-repos.sh

@@ -0,0 +1,83 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+cd "$(dirname "$0")"
+
+usage() {
+	cat <<"EOF"
+Downloads source code of Game Boy project repos used as RGBDS test cases.
+Options:
+    -h, --help      show this help message
+    --only-free     download only freely licensed codebases
+    --get-hash      print repos' commit hashes instead of downloading them
+    --get-paths     print repos' clone paths instead of downloading them
+EOF
+}
+
+# Parse options in pure Bash because macOS `getopt` is stuck
+# in what util-linux `getopt` calls `GETOPT_COMPATIBLE` mode
+nonfree=true
+actionname=
+while [[ $# -gt 0 ]]; do
+	case "$1" in
+		-h|--help)
+			usage
+			exit 0
+			;;
+		--only-free)
+			nonfree=false
+			;;
+		--get-hash|--get-paths)
+			actionname="$1"
+			;;
+		--)
+			break
+			;;
+		*)
+			echo "$(basename "$0"): unknown option '$1'"
+			exit 1
+			;;
+	esac
+	shift
+done
+
+case "$actionname" in
+	--get-hash)
+		action() {
+			printf "%s@%s-" "$EXT_TEST_REPO" "$EXT_TEST_COMMIT"
+		}
+		;;
+
+	--get-paths)
+		action() {
+			printf "test/external/%s," "$EXT_TEST_REPO"
+		}
+		;;
+
+	*)
+		echo "Fetching test dependency repositories"
+
+		action() {
+			if [ ! -d "$EXT_TEST_REPO" ]; then
+				git clone "https://$EXT_TEST_DOMAIN/$EXT_TEST_OWNER/$EXT_TEST_REPO.git" \
+					--revision="$EXT_TEST_COMMIT" --depth=1 --recursive --shallow-submodules \
+					--config advice.detachedHead=false
+			fi
+			pushd "$EXT_TEST_REPO"
+			git checkout --force --detach "$EXT_TEST_COMMIT" --
+			if [ -f "../patches/$EXT_TEST_REPO.patch" ]; then
+				git apply --ignore-whitespace "../patches/$EXT_TEST_REPO.patch"
+			fi
+			popd
+		}
+esac
+
+# Each iteration is isolated in a (subshell) so the sourced cfg variables don't "leak" out.
+for cfg in *.cfg; do (
+	# Sourcing "$cfg" defines `EXT_TEST_*` variables that get used by `action`.
+	. "$cfg"
+	# Only run a nonfree action if nonfree tests are opted into.
+	if ! $EXT_TEST_IS_NONFREE || $nonfree; then
+		action
+	fi
+); done

test/external/test.sh

@@ -6,24 +6,25 @@ export LC_ALL=C
 # Game Boy release date, 1989-04-21T12:34:56Z (for reproducible test results)
 export SOURCE_DATE_EPOCH=609165296
 
-cd "$(dirname "$0")/.."
+cd "$(dirname "$0")"
 
-RGBDS_PATH="RGBDS=../../"
-
-if [ ! -f "external/$1.cfg" ]; then
+if [ ! -f "$1.cfg" ]; then
 	echo >&2 'External test file '"$1"'.cfg does not exist'
 	exit 1
 fi
 
 # Sourcing "$1.cfg" defines `EXT_TEST_*` variables used below.
-. "external/$1.cfg"
+. "$1.cfg"
 
 if ! cd "$EXT_TEST_REPO"; then
 	echo >&2 'Please fetch test deps before running any external test'
 	exit 1
 fi
+
+RGBDS_PATH="RGBDS=../../../"
 make clean $RGBDS_PATH
 make -j4 "$EXT_TEST_TARGET" $RGBDS_PATH
+
 hash="$(sha1sum -b "$EXT_TEST_FILE" | head -c 40)"
 if [ "$hash" != "$EXT_TEST_HASH" ]; then
 	cat >&2 <<EOM