1 files changed, 39 insertions, 0 deletions
diff --git a/gitlint/contrib/rules/conventional_commit.py b/gitlint/contrib/rules/conventional_commit.py
new file mode 100644
index 0000000..3bbbd0f
--- /dev/null
+++ b/gitlint/contrib/rules/conventional_commit.py
@@ -0,0 +1,39 @@
+import re
+
+from gitlint.options import ListOption
+from gitlint.rules import CommitMessageTitle, LineRule, RuleViolation
+from gitlint.utils import ustr
+
+RULE_REGEX = re.compile(r"[^(]+?(\([^)]+?\))?: .+")
+
+
+class ConventionalCommit(LineRule):
+    """ This rule enforces the spec at https://www.conventionalcommits.org/. """
+
+    name = "contrib-title-conventional-commits"
+    id = "CT1"
+    target = CommitMessageTitle
+
+    options_spec = [
+        ListOption(
+            "types",
+            ["fix", "feat", "chore", "docs", "style", "refactor", "perf", "test", "revert"],
+            "Comma separated list of allowed commit types.",
+        )
+    ]
+
+    def validate(self, line, _commit):
+        violations = []
+
+        for commit_type in self.options["types"].value:
+            if line.startswith(ustr(commit_type)):
+                break
+        else:
+            msg = u"Title does not start with one of {0}".format(', '.join(self.options['types'].value))
+            violations.append(RuleViolation(self.id, msg, line))
+
+        if not RULE_REGEX.match(line):
+            msg = u"Title does not follow ConventionalCommits.org format 'type(optional-scope): description'"
+            violations.append(RuleViolation(self.id, msg, line))
+
+        return violations