.gitlint: Remove URLs from lines ending with URLs before linting

.gitignore

@@ -9,6 +9,7 @@ target/
 /__pycache__/
 hfuzz_target
 hfuzz_workspace
+.gitlint-rules/__pycache__/
 
 # IDE.
 .idea/*

.gitlint

@@ -4,6 +4,7 @@ ignore-merge-commits=true
 ignore-fixup-commits=false
 ignore-squash-commits=false
 ignore=body-is-missing
+extra-path=.gitlint-rules
 
 [title-max-length]
 line-length=72
@@ -13,6 +14,3 @@ line-length=80
 
 [body-min-length]
 min-length=20
-
-[title-must-not-contain-word]
-words=wip

.gitlint-rules/urls.py

@@ -0,0 +1,35 @@
+import re
+
+import gitlint
+from gitlint.rules import CommitRule, ConfigurationRule
+
+# Monkey patch gitlint so it allows us to define a user-defined ConfigurationRule.
+gitlint.rule_finder.assert_valid_rule_class = lambda *_: True
+
+# URL regular expression.
+URL_RE_RAW = r'http[s]?://(?:[a-zA-Z]|[0-9]|[$-_@.&+]|[!*\(\),]|(?:%[0-9a-fA-F][0-9a-fA-F]))+'
+URL_RE = re.compile(URL_RE_RAW, re.IGNORECASE)
+LINE_MATCH_RE = re.compile(r'.*' + URL_RE_RAW + r'$')
+
+class RemoveURLs(CommitRule, ConfigurationRule):
+    """Removes all URLs from all lines."""
+
+    name = "remove-urls"
+    id = "UC1"
+
+    def apply(self, config, commit):
+        """Modify the commit message to remove all URLs."""
+        if not commit.message.body:
+            return
+
+        # Skip the first line as we shouldn't have URLs in the title.
+        new_body = [commit.message.body[0]]
+        new_body += [
+            URL_RE.sub('', line).strip() if LINE_MATCH_RE.match(line) else line
+            for line in commit.message.body[1:]
+        ]
+        commit.message.body = new_body
+
+    def validate(self, commit):
+        """Implements CommitRule."""
+        return