ci: add type-checking step with real Live resources

.github/workflows/validate.yml

@@ -22,3 +22,24 @@ jobs:
       - run: python -m pip install poetry
       - run: poetry install
       - run: make lint
+
+  check-types:
+    runs-on: macos-13
+    timeout-minutes: 30
+    steps:
+      - name: Set up Homebrew
+        id: set-up-homebrew
+        uses: Homebrew/actions/setup-homebrew@master
+
+      - name: Install Ableton Live
+        run: brew install --cask ableton-live-lite
+
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: 3.8
+          cache: pip
+
+      - run: python -m pip install poetry
+      - run: poetry install
+      - run: make check

Makefile

@@ -1,6 +1,8 @@
 POETRY := $(shell command -v poetry 2> /dev/null)
 
-SYSTEM_MIDI_REMOTE_SCRIPTS_DIR := /Applications/Ableton\ Live\ 12\ Suite.app/Contents/App-Resources/MIDI\ Remote\ Scripts
+# Recognize "Ableton Live 12 Suite", "Ableton Live 12 Lite", etc. Escape whitespace int
+# he result so that we can use this as a target.
+SYSTEM_MIDI_REMOTE_SCRIPTS_DIR := $(shell ls -d /Applications/Ableton\ Live\ 12\ *.app/Contents/App-Resources/MIDI\ Remote\ Scripts 2> /dev/null | head -n 1 | sed 's/ /\\ /g')
 
 TEST_PROJECT_SET_NAMES := backlight default overrides standalone wide_clip_launch
 TEST_PROJECT_DIR := tests/modeStep_tests_project
@@ -34,8 +36,7 @@ img: .make.install
 .PHONY: clean
 clean:
 	rm -rf __ext__/System_MIDIRemoteScripts/
-# The .venv folder gets created by poetry (because
-# tool.poetry.virtualenvs.in-project is enabled).
+# The .venv folder gets created by poetry (because virtualenvs.in-project is enabled).
 	rm -rf .venv/
 	rm -f .make.install
 
@@ -44,8 +45,22 @@ $(TEST_PROJECT_DIR)/%.als: .make.install $(TEST_PROJECT_DIR)/create_set.py
 	$(POETRY) run python $(TEST_PROJECT_DIR)/create_set.py $*
 
 __ext__/System_MIDIRemoteScripts/.make.decompile: $(SYSTEM_MIDI_REMOTE_SCRIPTS_DIR) | .make.install
+# Sanity check before rm'ing.
+	@if [ -z "$(@D)" ]; then \
+		echo "Sanity check failed: compile dir is not set"; \
+		exit 1; \
+	fi
 	rm -rf $(@D)/
 	mkdir -p $(@D)/ableton/
+	@if [ -z $(SYSTEM_MIDI_REMOTE_SCRIPTS_DIR) ]; then \
+		echo "System remote scripts directory not found" ; \
+		exit 1; \
+	fi
+	@if [ ! -d $(SYSTEM_MIDI_REMOTE_SCRIPTS_DIR) ]; then \
+		echo "The specified remote scripts directory ("$(SYSTEM_MIDI_REMOTE_SCRIPTS_DIR)") does not exist"; \
+		exit 1; \
+	fi
+
 # decompyle3 works for most files, and the ones where it doesn't don't
 # matter for our purposes.
 	$(POETRY) run decompyle3 -r -o $(@D)/ableton/ $(SYSTEM_MIDI_REMOTE_SCRIPTS_DIR)/ableton/