fix(requirements-txt-fixer): keep --index-url before --extra-index-url

pre_commit_hooks/requirements_txt_fixer.py

@@ -13,6 +13,10 @@
 class Requirement:
     UNTIL_COMPARISON = re.compile(b'={2,3}|!=|~=|>=?|<=?')
     UNTIL_SEP = re.compile(rb'[^;\s]+')
+    _SPECIAL_ORDER = {
+        b'--index-url': 0,
+        b'--extra-index-url': 1,
+    }
 
     def __init__(self) -> None:
         self.value: bytes | None = None
@@ -50,7 +54,13 @@ def __lt__(self, requirement: Requirement) -> bool:
             # with comments is kept)
             if self.name == requirement.name:
                 return bool(self.comments) > bool(requirement.comments)
-            return self.name < requirement.name
+            return (
+                self._SPECIAL_ORDER.get(self.name, 2),
+                self.name,
+            ) < (
+                self._SPECIAL_ORDER.get(requirement.name, 2),
+                requirement.name,
+            )
 
     def is_complete(self) -> bool:
         return (

tests/requirements_txt_fixer_test.py

@@ -107,6 +107,15 @@
             PASS,
             b'a=2.0.0 \\\n --hash=sha256:abcd\nb==1.0.0\n',
         ),
+        (
+            b'--extra-index-url https://example.com/simple\n'
+            b'--index-url https://pypi.org/simple\n'
+            b'requests\n',
+            FAIL,
+            b'--index-url https://pypi.org/simple\n'
+            b'--extra-index-url https://example.com/simple\n'
+            b'requests\n',
+        ),
     ),
 )
 def test_integration(input_s, expected_retval, output, tmpdir):