fix: body check must not count git trailers as body content

src/git_commit_guard/__init__.py

@@ -27,6 +27,7 @@
 )
 
 _NON_IMPERATIVE_SUFFIX_RE = re.compile(r"(?:ing|ed)$")
+_TRAILER_RE = re.compile(r"^[\w-]+:\s+\S")
 
 SUBJECT_RE = re.compile(
     r"^(?P<type>\w+)(?:\((?P<scope>[^)]+)\))?!?:\s+(?P<desc>.+)$",
@@ -173,7 +174,8 @@ def check_body(lines, result):
         return
     if lines[1].strip():
         result.error("missing blank line between subject and body")
-    if not any(ln.strip() for ln in lines[2:]):
+    body_lines = [ln for ln in lines[2:] if not _TRAILER_RE.match(ln)]
+    if not any(ln.strip() for ln in body_lines):
         result.error("missing body")
 
 

tests/test_git_commit_guard.py

@@ -200,6 +200,17 @@ def test_multiline_body(self):
         check_body(["fix: add thing", "", "line one", "line two"], r)
         assert r.ok
 
+    def test_trailer_only_is_not_body(self):
+        r = Result()
+        check_body(["fix: add thing", "", "Signed-off-by: Name <name@example.com>"], r)
+        assert not r.ok
+
+    def test_body_with_trailer_passes(self):
+        r = Result()
+        trailer = "Signed-off-by: Name <name@example.com>"
+        check_body(["fix: add thing", "", "actual body", trailer], r)
+        assert r.ok
+
 
 class TestCheckSignedOff:
     def test_valid(self):