Move dependencies in 'external' directory and pdate git submodules

external/Catch2/tools/scripts/checkLicense.py

@@ -0,0 +1,46 @@
+#!/usr/bin/env python3
+
+import sys
+import glob
+
+correct_licence = """\
+
+//              Copyright Catch2 Authors
+// Distributed under the Boost Software License, Version 1.0.
+//   (See accompanying file LICENSE.txt or copy at
+//        https://www.boost.org/LICENSE_1_0.txt)
+
+// SPDX-License-Identifier: BSL-1.0
+"""
+
+def check_licence_in_file(filename: str) -> bool:
+    with open(filename, 'r') as f:
+        file_preamble = ''.join(f.readlines()[:7])
+
+    if correct_licence != file_preamble:
+        print('File {} does not have proper licence'.format(filename))
+        return False
+    return True
+
+def check_licences_in_path(path: str) -> int:
+    failed = 0
+    files_to_check = glob.glob(path + '/**/*.cpp', recursive=True) \
+                   + glob.glob(path + '/**/*.hpp', recursive=True)
+    for file in files_to_check:
+        if not check_licence_in_file(file):
+            failed += 1
+    return failed
+
+def check_licences():
+    failed = 0
+    # Add 'extras' after the amalgamted files are regenerated with the new script (past 3.4.0)
+    roots = ['src/catch2', 'tests', 'examples', 'fuzzing']
+    for root in roots:
+        failed += check_licences_in_path(root)
+    
+    if failed:
+        print('{} files are missing licence'.format(failed))
+        sys.exit(1)
+
+if __name__ == "__main__":
+    check_licences()