script rendering templates IN PROGRESS

.github/workflows/render_all_templates.yaml

@@ -23,6 +23,5 @@ jobs:
           python-version: '3.12'
       - name: Install Snowflake CLI
         run: python -m pip install git+https://github.com/snowflakedb/snowflake-cli.git@932adb508f2be468da234fa0423244a27de99662
-
-      - name: Run help
-        run: snow init -h
+      - name: Render all templates
+        run: python .github/workflows/scripts/render_all_templates.py .

.github/workflows/scripts/render_all_templates.py

@@ -0,0 +1,71 @@
+import subprocess
+import sys
+from pathlib import Path
+from tempfile import TemporaryDirectory
+from typing import List
+
+EXCLUDE_PATHS = [".git", ".github"]
+
+
+def _yield_template_yml_files(path: Path):
+    if path.name in EXCLUDE_PATHS:
+        return
+
+    if path.name == "template.yml":
+        yield path
+    if path.is_dir():
+        for child in path.iterdir():
+            yield from _yield_template_yml_files(child)
+
+
+def _failed_render_error(template_root: Path) -> None:
+    print(f"Error while rendering template {template_root}")
+    sys.exit(1)
+
+
+def _render_template(template_root: Path):
+    print(f"Rendering {template_root}")
+    with TemporaryDirectory() as tmpdir:
+        project_path = Path(tmpdir) / "project"
+
+        # overestimate number of variables in the template
+        max_number_of_variables = (
+            (template_root / "template.yml").read_text().count("\n")
+        )
+        # 42 can be parsed by all supported types (int/float/string)
+        process_input = "42\n" * max_number_of_variables
+
+        snow = subprocess.Popen(
+            [
+                "snow",
+                "init",
+                str(project_path),
+                "--template-source",
+                str(template_root),
+            ],
+            stdin=subprocess.PIPE,
+            stdout=subprocess.PIPE,
+        )
+        # reasonable 60s timeout
+        try:
+            snow.communicate(input=process_input.encode(), timeout=60)
+        except subprocess.TimeoutExpired:
+            print("Timed out after 60s!")
+            _failed_render_error(template_root)
+        if snow.returncode:
+            print(f"Rendering finished with {snow.returncode}")
+            _failed_render_error(template_root)
+
+
+if __name__ == "__main__":
+    if len(sys.argv) != 2:
+        print(f"Usage: {sys.argv[0]} PATH")
+        sys.exit(1)
+
+    root_path = Path(sys.argv[1])
+    template_yml_list: List[Path] = list(_yield_template_yml_files(root_path))
+    for template_yml in template_yml_list:
+        template_root = template_yml.parent
+        _render_template(template_root)
+
+    print("OK")