First working version of Mermaid class diagram generator

util/generate_mermaid.py

@@ -0,0 +1,47 @@
+#!/usr/bin/python3
+
+##
+## util/validate_json.py
+##
+## Copyright (c) 2021-2023 Bartek Kryza <bkryza@gmail.com>
+##
+## Licensed under the Apache License, Version 2.0 (the "License");
+## you may not use this file except in compliance with the License.
+## You may obtain a copy of the License at
+##
+##     http://www.apache.org/licenses/LICENSE-2.0
+##
+## Unless required by applicable law or agreed to in writing, software
+## distributed under the License is distributed on an "AS IS" BASIS,
+## WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+## See the License for the specific language governing permissions and
+## limitations under the License.
+##
+import sys
+import subprocess
+
+from pathlib import Path
+
+def print_usage():
+    print(f'Usage: ./generate_mermaid.py file1.mmd file2.mmd ...')
+
+
+files = sys.argv[1:]
+
+
+if not files:
+    print_usage()
+    sys.exit(1)
+
+ok = 0
+
+for f in files:
+    try:
+        print(f'Generating Mermaid diagram from {f}')
+        f_svg = Path(f).with_suffix('.png')
+        subprocess.check_call(['mmdc',  '-i', f, '-o', f_svg])
+    except subprocess.CalledProcessError:
+        ok = 1
+        print(f'ERROR: Generating Mermaid diagram from {f} failed')
+
+sys.exit(ok)