Implement functions to find links in a text/file

scripts/validate/links.py

@@ -0,0 +1,42 @@
+# -*- coding: utf-8 -*-
+
+import sys
+import re
+from typing import List
+
+
+def find_links_in_text(text: str) -> List[str]:
+    """Find links in a text and return a list of URLs."""
+
+    link_pattern = re.compile(r'((?:https?://|www\d{0,3}[.]|[a-z0-9.\-]+[.][a-z]{2,4}/)(?:[^\s()<>]+|\(([^\s()<>]+|(\([^\s()<>]+\)))*\))+(?:\(([^\s()<>]+|(\([^\s()<>]+\)))*\)|[^\s`!()\[\]{};:\'\".,<>?«»“”‘’]))')
+
+    raw_links = re.findall(link_pattern, text)
+
+    links = [
+        str(raw_link[0]).rstrip('/') for raw_link in raw_links
+    ]
+
+    return links
+
+
+def find_links_in_file(filename: str) -> List[str]:
+    """Find links in a file and return a list of URLs from text file."""
+
+    with open(filename, mode='r', encoding='utf-8') as file:
+        readme = file.read()
+        index_section = readme.find('## Index')
+        content = readme[index_section:]
+
+    links = find_links_in_text(content)
+
+    return links
+
+
+if __name__ == '__main__':
+    num_args = len(sys.argv)
+
+    if num_args < 2:
+        print('No .md file passed')
+        sys.exit(1)
+
+    links = find_links_in_file(sys.argv[1])