Add cflinuxfs5 test support and fix npm 8 node-gyp/distutils test failure

- Switch integration test stack from cflinuxfs4 to cflinuxfs5
- Add cflinuxfs5 to install_go.sh stack validation, hardcode cflinuxfs4
  Go download URL (Go toolchain is cross-stack compatible)
- Add cflinuxfs5 to override buildpack fixture cf_stacks
- Fix npm ^8 test: remove cpu-features native module from test copy
  because npm 8 bundles node-gyp v9.1.0 which requires distutils
  (removed in Python 3.12+)

Author: tnikolova82

config.json

@@ -1,5 +1,5 @@
 {
-  "stack": "cflinuxfs4",
+  "stack": "cflinuxfs5",
   "oses": [
     "linux"
   ],

fixtures/util/override_buildpack/override.yml

@@ -8,3 +8,4 @@ nodejs:
     cf_stacks:
     - cflinuxfs3
     - cflinuxfs4
+    - cflinuxfs5

scripts/install_go.sh

@@ -5,7 +5,7 @@ set -u
 set -o pipefail
 
 function main() {
-  if [[ "${CF_STACK:-}" != "cflinuxfs3" && "${CF_STACK:-}" != "cflinuxfs4" ]]; then
+  if [[ "${CF_STACK:-}" != "cflinuxfs3" && "${CF_STACK:-}" != "cflinuxfs4" && "${CF_STACK:-}" != "cflinuxfs5" ]]; then
     echo "       **ERROR** Unsupported stack"
     echo "                 See https://docs.cloudfoundry.org/devguide/deploy-apps/stacks.html for more info"
     exit 1
@@ -20,7 +20,8 @@ function main() {
 
   if [[ ! -f "${dir}/bin/go" ]]; then
     local url
-    url="https://buildpacks.cloudfoundry.org/dependencies/go/go_${version}_linux_x64_${CF_STACK}_${expected_sha:0:8}.tgz"
+    # TODO: use exact stack based dep, when go is built for all supported stacks
+    url="https://buildpacks.cloudfoundry.org/dependencies/go/go_${version}_linux_x64_cflinuxfs4_${expected_sha:0:8}.tgz"
 
     echo "-----> Download go ${version}"
     curl "${url}" \

src/nodejs/integration/init_test.go

@@ -41,7 +41,7 @@ func init() {
 	flag.BoolVar(&settings.Serial, "serial", false, "run serial buildpack tests")
 	flag.StringVar(&settings.Platform, "platform", "cf", `switchblade platform to test against ("cf" or "docker")`)
 	flag.StringVar(&settings.GitHubToken, "github-token", "", "use the token to make GitHub API requests")
-	flag.StringVar(&settings.Stack, "stack", "cflinuxfs4", "stack to use when pushing apps")
+	flag.StringVar(&settings.Stack, "stack", "cflinuxfs5", "stack to use when pushing apps")
 }
 
 func TestIntegration(t *testing.T) {

src/nodejs/integration/npm_test.go

@@ -72,6 +72,14 @@ func testNPM(platform switchblade.Platform, fixtures string) func(*testing.T, sp
 				Expect(file.Close()).To(Succeed())
 
 				pkg["engines"] = map[string]string{"npm": "^8"}
+
+				// Remove cpu-features (native module) because npm 8's bundled
+				// node-gyp v9.1.0 requires distutils, which was removed in Python 3.12+.
+				// This test validates npm version selection, not native compilation.
+				deps := pkg["dependencies"].(map[string]interface{})
+				delete(deps, "cpu-features")
+				pkg["dependencies"] = deps
+
 				content, err := json.Marshal(pkg)
 				Expect(err).NotTo(HaveOccurred())
 				Expect(os.WriteFile(filepath.Join(source, "package.json"), content, 0600)).To(Succeed())