ci: install toolchain in Alpine runner

.gitea/workflows/ci.yml

@@ -15,17 +15,24 @@ jobs:
     timeout-minutes: 45
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
-      - uses: actions/setup-python@42375524e23c412d93fb67b49958b491fce71c38
+      - name: Install test toolchain
-        with:
+        run: |
-          python-version: "3.12"
+          set -eu
-          cache: pip
+          apk add --no-cache curl python3 py3-pip
-      - uses: actions/setup-go@0a12ed9d6a96ab950c8f026ed9f722fe0da7ef32
+          curl --fail --location --silent --show-error \
-        with:
+            --output /tmp/go1.27.1.linux-amd64.tar.gz \
-          go-version: "1.27.1"
+            https://go.dev/dl/go1.27.1.linux-amd64.tar.gz
-      - name: Install test dependencies
+          echo "63d339f0da5ab53635a56f2490a7984dfe12dfcff22ad749f63edaf590168445  /tmp/go1.27.1.linux-amd64.tar.gz" \
-        run: python -m pip install --requirement requirements-dev.txt
+            | sha256sum -c -
+          mkdir -p /opt/go1.27.1
+          tar --extract --gzip --file /tmp/go1.27.1.linux-amd64.tar.gz \
+            --directory /opt/go1.27.1 --strip-components 1
+          ln -sf /opt/go1.27.1/bin/go /usr/local/bin/go
+          go version
+          python3 -m venv .venv
+          .venv/bin/pip install --requirement requirements-dev.txt
       - name: Validate metadata, patches, and process manager
-        run: pytest -q
+        run: .venv/bin/pytest -q
       - name: Build amd64 image
         run: docker buildx build --platform linux/amd64 --build-arg BUILD_ARCH=amd64 --load --tag homeassistant-stelloauth-addon:test stelloauth
       - name: Exercise runtime

tests/test_addon_metadata.py

@@ -173,6 +173,34 @@ def test_ci_builds_and_loads_only_the_amd64_test_image() -> None:
         assert publication_primitive not in workflow
 
 
+def test_ci_installs_toolchain_without_hosted_toolcache_actions() -> None:
+    workflow = (ROOT / ".gitea/workflows/ci.yml").read_text(encoding="utf-8")
+    parsed = yaml.safe_load(workflow)
+    steps = parsed["jobs"]["validate"]["steps"]
+    setup_command = next(
+        step["run"] for step in steps if step.get("name") == "Install test toolchain"
+    )
+
+    assert "actions/setup-python" not in workflow
+    assert "actions/setup-go" not in workflow
+    for required_command in (
+        "apk add --no-cache curl python3 py3-pip",
+        "go1.27.1.linux-amd64.tar.gz",
+        "63d339f0da5ab53635a56f2490a7984dfe12dfcff22ad749f63edaf590168445",
+        "sha256sum -c -",
+        "python3 -m venv .venv",
+        ".venv/bin/pip install --requirement requirements-dev.txt",
+    ):
+        assert required_command in setup_command
+
+    validation_command = next(
+        step["run"]
+        for step in steps
+        if step.get("name") == "Validate metadata, patches, and process manager"
+    )
+    assert validation_command == ".venv/bin/pytest -q"
+
+
 def test_patch_payloads_disable_git_whitespace_errors() -> None:
     result = subprocess.run(
         [