ENT-13814: Added syntax-description and GH Action to update it weekly to replace policy_language.py

.github/workflows/update-syntax-description.yml

@@ -0,0 +1,69 @@
+name: Update syntax-description
+
+on:
+  schedule:
+    - cron: "0 7 * * 1" # Run every Monday at 7am UTC
+    #        | | | | |
+    #        | | | | day of the week (0-6) (Sunday to Saturday)
+    #        | | | month (1-12)
+    #        | | day of the month (1-31)
+    #        | hour (0-23)
+    #        minute (0-59)
+  workflow_dispatch: # Enables manual trigger
+
+jobs:
+  update_syntax_desc:
+    name: Update syntax-description
+    runs-on: ubuntu-24.04
+    permissions:
+      contents: write
+      pull-requests: write
+    steps:
+      - name: Checks-out repository
+        uses: actions/checkout@v4
+        with:
+          ref: "main"
+      - name: Set up Python 3.12
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install cf-remote
+      - name: Install cfengine
+        run: |
+          cf-remote --version master download --edition community ubuntu24 amd64 hub
+          sudo dpkg -i ~/.cfengine/cf-remote/packages/cfengine-community*.deb
+
+      - name: Extract new syntax-description
+        run: |
+          (
+            sudo cf-promises --syntax-description json
+          ) > new.json
+          echo "" >> new.json
+      - name: Set Git user
+        run: |
+          git config user.name 'github-actions[bot]'
+          git config user.email 'github-actions[bot]@users.noreply.github.com'
+      - name: Update contents of syntax-description
+        run: |
+          if ! cmp -s new.json ./src/cfengine_cli/syntax-description.json; then
+                      cat new.json > ./src/cfengine_cli/syntax-description.json
+                      echo "CHANGES_DETECTED=true" >> $GITHUB_ENV
+                      rm new.json
+                    fi
+      - name: Create Pull Request
+        if: env.CHANGES_DETECTED ==  'true'
+        uses: cfengine/create-pull-request@v6
+        with:
+          title: Updated syntax-description.json
+          body: Automated update to syntax-description.json [the `update-syntax-description` workflow](https://github.com/cfengine/cfengine-cli/tree/main/.github/workflows/update-syntax-description.yml).
+          reviewers: |
+            simonthalvorsen
+            olehermanse
+            larsewi
+            nickanderson
+            craigcomstock
+          branch: update-syntax-description
+          branch-suffix: timestamp

pyproject.toml

@@ -40,6 +40,9 @@ cfengine = "cfengine_cli.main:main"
 [tool.setuptools]
 license-files = [] # Workaround bug in setuptools https://github.com/astral-sh/uv/issues/9513
 
+[tool.setuptools.package-data]
+cfengine_cli = ["*.json"] # syntax-description.json
+
 [tool.pyright]
 include = ["src"]
 venvPath = "."

src/cfengine_cli/lint.py

@@ -37,17 +37,56 @@
 from cfbs.validate import validate_config
 from cfbs.cfbs_config import CFBSConfig
 from cfbs.utils import find
-from cfengine_cli.policy_language import (
-    DEPRECATED_PROMISE_TYPES,
-    ALLOWED_BUNDLE_TYPES,
-    BUILTIN_PROMISE_TYPES,
-    BUILTIN_FUNCTIONS,
-)
 from cfengine_cli.utils import UserError
 
 LINT_EXTENSIONS = (".cf", ".json")
 
 
+def _load_syntax_description(path: str | None = None) -> dict:
+    """Load and return the parsed syntax-description.json file."""
+    if path is None:
+        path = os.path.join(os.path.dirname(__file__), "syntax-description.json")
+    with open(path, "r") as f:
+        return json.load(f)
+
+
+def _derive_syntax_sets(data: dict) -> tuple:
+    """Derive the four sets used for linting from a loaded syntax-description dict.
+
+    Returns: (ALLOWED_BUNDLE_TYPES, BUILTIN_PROMISE_TYPES, BUILTIN_FUNCTIONS, DEPRECATED_PROMISE_TYPES)
+    """
+    builtin_body_types = set(data.get("bodyTypes", {}).keys())
+
+    allowed_bundle_types = data.get("bundleTypes", {}).keys()
+
+    builtin_promise_types = set(data.get("promiseTypes", {}).keys())
+
+    builtin_functions = set(data.get("functions", {}).keys())
+
+    deprecated_promise_types = {
+        "defaults",
+        "guest_environments",
+    }  # Has to be hardcoded, not tagged in syntax-description.json
+
+    return (
+        builtin_body_types,
+        allowed_bundle_types,
+        builtin_promise_types,
+        builtin_functions,
+        deprecated_promise_types,
+    )
+
+
+_SYNTAX_DATA = _load_syntax_description()
+(
+    _,
+    ALLOWED_BUNDLE_TYPES,
+    BUILTIN_PROMISE_TYPES,
+    BUILTIN_FUNCTIONS,
+    DEPRECATED_PROMISE_TYPES,
+) = _derive_syntax_sets(_SYNTAX_DATA)
+
+
 def _qualify(name: str, namespace: str) -> str:
     """If name is already qualified (contains ':'), return as-is. Otherwise prepend namespace."""
     assert '"' not in namespace