C#: Add python script for generating YAML files containing data extensions.

csharp/ql/src/utils/modelconverter/ConvertExtensions.py

@@ -0,0 +1,34 @@
+# Tool to generate data extensions files based on the existing models.
+# Usage:
+# python3 ConvertExtensions.py
+# (1) A folder named `csharp/ql/lib/ext` will be created, if it doesn't already exist.
+# (2) The converted models will be written to `csharp/ql/lib/ext`. One file for each namespace.
+
+import os
+import subprocess
+import sys
+
+# Add Models as Data script directory to sys.path.
+gitroot = subprocess.check_output(["git", "rev-parse", "--show-toplevel"]).decode("utf-8").strip()
+madpath = os.path.join(gitroot, "misc/scripts/models-as-data/")
+sys.path.append(madpath)
+
+import helpers
+import convert_extensions as extensions
+
+print('Running script to generate data extensions files from the existing MaD models.')
+print('Making a dummy database.')
+
+# Configuration
+language = "csharp"
+dbDir = "db"
+
+helpers.run_cmd(['codeql', 'database', 'create', f'--language={language}', '-c', 'dotnet clean project/', '-c', 'dotnet build project/', dbDir])
+
+print('Converting data extensions for C#.')
+extensions.Converter(language, dbDir).run()
+
+print('Cleanup.')
+# Cleanup - delete database.
+helpers.remove_dir(dbDir)
+print('Done.')