Further make run improvements (#1649)

* Stops using the `-it` options, since whilst interactive mode allows
  for instant termination of the container using Ctrl/CMD+C during
  development, it interferes with running the command via `watchexec`.
  Similarly, enabling the TTY leads to tools not behaving the same as
  they will on the actual Heroku build system (eg using colours in auto
  mode), so that has been disabled too, to make this development
  workflow more representative. Doing so also means the GitHub Actions
  workaround for TTY is no longer required.
* Sanitises the env vars to more closely match those allow-listed in
  Cytokine. This prevents vars like `CNB_USER_ID` and `CNB_STACK_ID`
  from leaking through from the new combined Heroku+CNB base images.
* If an inline buildpack is detected in the test fixture, it is now
  run too - matching what the equivalent Hatchet test would be
  configured to do.

GUS-W-16866418.

.github/workflows/ci.yml

@@ -65,11 +65,6 @@ jobs:
 
   container-test:
     runs-on: ubuntu-24.04
-    defaults:
-      run:
-        # Work around lack of TTY causing errors when using `docker run -it`:
-        # https://github.com/actions/runner/issues/241
-        shell: 'script -q -e -c "bash -eo pipefail {0}"'
     steps:
       - name: Checkout
         uses: actions/checkout@v4

Makefile

@@ -23,16 +23,20 @@ format:
 
 run:
 	@echo "Running buildpack using: STACK=$(STACK) FIXTURE=$(FIXTURE)"
-	@docker run --rm -it -v $(PWD):/src:ro --tmpfs /app -e "HOME=/app" -e "STACK=$(STACK)" "$(STACK_IMAGE_TAG)" \
-		bash -eo pipefail -c '\
+	@docker run --rm -v $(PWD):/src:ro --tmpfs /app -e "HOME=/app" -e "STACK=$(STACK)" "$(STACK_IMAGE_TAG)" \
+		bash -euo pipefail -c '\
 			mkdir /tmp/buildpack /tmp/build /tmp/cache /tmp/env; \
 			cp -r /src/{bin,lib,requirements,vendor} /tmp/buildpack; \
 			cp -rT /src/$(FIXTURE) /tmp/build; \
 			cd /tmp/buildpack; \
+			unset $$(printenv | cut -d '=' -f 1 | grep -vE "^(HOME|LANG|PATH|STACK)$$"); \
 			echo -e "\n~ Detect:" && ./bin/detect /tmp/build; \
-			echo -e "\n~ Compile:" && { ./bin/compile /tmp/build /tmp/cache /tmp/env || SKIP_RELEASE=1; }; \
+			echo -e "\n~ Compile:" && { ./bin/compile /tmp/build /tmp/cache /tmp/env || COMPILE_FAILED=1; }; \
 			echo -e "\n~ Report:" && ./bin/report /tmp/build /tmp/cache /tmp/env; \
-			[[ -n "$${SKIP_RELEASE}" ]] || { echo -e "\n~ Release:" && ./bin/release /tmp/build && echo -e "\nBuild successful!"; }; \
+			[[ "$${COMPILE_FAILED:-}" == "1" ]] && exit 0; \
+			[[ -f /tmp/build/bin/compile ]] && { echo -e "\n~ Compile (Inline Buildpack):" && (source ./export && /tmp/build/bin/compile /tmp/build /tmp/cache /tmp/env); }; \
+			echo -e "\n~ Release:" && ./bin/release /tmp/build; \
+			echo -e "\nBuild successful!"; \
 		'
 	@echo