chore: rewrite github action

Not sure why godot-tester moved to node, but now subprocesses don't log
anymore, so we don't get any test output. Also, it depends on parsing an
xml results file, which is never written to when imports/tests fail for
misc other reasons, making it un-debugable. Pulling and rewriting the
godot-html-export action to run gut tests - could probably just install
bababshka and run my bb tasks instead...

Also, i think the tests are failing to run b/c of missing assets - but
i'd like to see that output in CI somehow first

.github/workflows/gut_tests.yml

@@ -7,49 +7,28 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
-    - run: touch ./test_results.xml
-    - uses: croconut/godot-tester@v5.1
-      with:
-        # required
-        version: "4.1.1"
-        # the type of release of godot that the tests should be run with
-        # release_type: "rc2"
-
-        # the folder with your project.godot file in it
-        path: "."
-
-        # how long to spend importing assets before tests are run
-        import-time: "false"
-        # how long tests can run in seconds
-        test-timeout: "false"
-        # the ratio of tests that must pass for this action to pass
-        # e.g. 0.6 means 60% of your tests must pass
-        minimum-pass: "1.0"
-
-        # the directory containing Gut tests
-        test-dir: "res://test"
-
-        # instead of running GUT's command line tool, you can run a test scene if you have one
-        # set up a scene like in this repo --> located at /tester_GUT_v9.0.1/test/alt_mode/tests.tscn
-        # set up a script like in this repo --> located at /tester_GUT_v9.0.1/test/alt_mode/cli_test.gd
-        # ensure that the script exits on test completion
-        # uses relative path from your godot project directory
-        # direct-scene: "tester_GUT_v9.0.1/test/alt_mode/tests.tscn"
-        direct-scene: "false"
 
-        # default is false, set true to count asserts instead of tests
-        assert-check: "false"
-
-        # not checked by default, set to a number to limit the
-        # maximum amount of failed tests for a passing test suite
-        max-fails: 0
-
-        # default is GUTs default: 'res://.gutconfig.json'; set this to load a different config file
-        config-file: "res://.gutconfig.json"
-
-        # designate a custom url to download the godot binary from
-        # custom-godot-dl-url: ""
-
-        # relative path to the xml file to read / write GUT's results from, recommended
-        # for direct-scene users to check this file if you have issues
-        result-output-file: "test_results.xml"
+    - name: Cache Godot files
+      id: cache-godot
+      uses: actions/cache@v3
+      with:
+        path: |
+          ~/.local/share/godot/**
+          /usr/local/bin/godot
+          ~/.config/godot/**
+        key: ${{ runner.os }}-godot-${{ vars.GODOT_VERSION }}
+
+    - name: Download and config Godot Engine headless linux server
+      if: steps.cache-godot.outputs.cache-hit != 'true'
+      shell: bash
+      run: |
+        wget -q https://downloads.tuxfamily.org/godotengine/${{ vars.GODOT_VERSION }}/Godot_v${{ vars.GODOT_VERSION }}$URL_SUFFIX
+        mkdir ~/.cache
+        mkdir -p ~/.config/godot
+        unzip Godot_v${{ vars.GODOT_VERSION }}$URL_SUFFIX
+        mv Godot_v${{ vars.GODOT_VERSION }}-stable_linux_headless.64 /usr/local/bin/godot
+        godot -e -q
+
+    - name: Run tests
+      shell: bash
+      run: godot --headless --path . -d -s addons/gut/gut_cmdln.gd -gexit