Temporarily restore python 3.6.0 support

.pre-commit-config.yaml

@@ -43,11 +43,6 @@ repos:
     rev: v1.6.0
     hooks:
     -   id: setup-cfg-fmt
--   repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v0.761
-    hooks:
-    -   id: mypy
-        exclude: ^testing/resources/
 -   repo: meta
     hooks:
     -   id: check-hooks-apply

pre_commit/commands/autoupdate.py

@@ -31,11 +31,13 @@ class RevInfo(NamedTuple):
     rev: str
     frozen: Optional[str]
 
-    @classmethod
-    def from_config(cls, config: Dict[str, Any]) -> 'RevInfo':
+
+@classmethod
+def RevInfo_from_config(cls, config: Dict[str, Any]) -> 'RevInfo':
     return cls(config['repo'], config['rev'], None)
 
-    def update(self, tags_only: bool, freeze: bool) -> 'RevInfo':
+
+def RevInfo_update(self, tags_only: bool, freeze: bool) -> 'RevInfo':
     if tags_only:
         tag_cmd = ('git', 'describe', 'FETCH_HEAD', '--tags', '--abbrev=0')
     else:
@@ -59,6 +61,11 @@ class RevInfo(NamedTuple):
     return self._replace(rev=rev, frozen=frozen)
 
 
+# python 3.6.0 does not support methods on `typing.NamedTuple`
+RevInfo.from_config = RevInfo_from_config
+RevInfo.update = RevInfo_update
+
+
 class RepositoryCannotBeUpdatedError(RuntimeError):
     pass
 

pre_commit/envcontext.py

@@ -19,7 +19,11 @@ UNSET = _Unset.UNSET
 
 class Var(NamedTuple):
     name: str
-    default: str = ''
+    default: str
+
+
+# python3.6.0: `typing.NamedTuple` did not support defaults
+Var.__new__.__defaults__ = ('',)
 
 
 SubstitutionT = Tuple[Union[str, Var], ...]

pre_commit/hook.py

@@ -35,12 +35,14 @@ class Hook(NamedTuple):
     stages: Sequence[str]
     verbose: bool
 
-    @property
-    def cmd(self) -> Tuple[str, ...]:
+
+@property
+def Hook_cmd(self: Hook) -> Tuple[str, ...]:
     return (*shlex.split(self.entry), *self.args)
 
-    @property
-    def install_key(self) -> Tuple[Prefix, str, str, Tuple[str, ...]]:
+
+@property
+def Hook_install_key(self) -> Tuple[Prefix, str, str, Tuple[str, ...]]:
     return (
         self.prefix,
         self.language,
@@ -48,8 +50,9 @@ class Hook(NamedTuple):
         tuple(self.additional_dependencies),
     )
 
-    @classmethod
-    def create(cls, src: str, prefix: Prefix, dct: Dict[str, Any]) -> 'Hook':
+
+@classmethod
+def Hook_create(cls, src: str, prefix: Prefix, dct: Dict[str, Any]) -> 'Hook':
     # TODO: have cfgv do this (?)
     extra_keys = set(dct) - _KEYS
     if extra_keys:
@@ -60,4 +63,10 @@ class Hook(NamedTuple):
     return cls(src=src, prefix=prefix, **{k: dct[k] for k in _KEYS})
 
 
+# python 3.6.0 does not support methods on `typing.NamedTuple`
+Hook.cmd = Hook_cmd
+Hook.install_key = Hook_install_key
+Hook.create = Hook_create
+
+
 _KEYS = frozenset(set(Hook._fields) - {'src', 'prefix'})

pre_commit/prefix.py

@@ -6,12 +6,21 @@ from typing import Tuple
 class Prefix(NamedTuple):
     prefix_dir: str
 
-    def path(self, *parts: str) -> str:
+
+def Prefix_path(self, *parts: str) -> str:
     return os.path.normpath(os.path.join(self.prefix_dir, *parts))
 
-    def exists(self, *parts: str) -> bool:
+
+def Prefix_exists(self, *parts: str) -> bool:
     return os.path.exists(self.path(*parts))
 
-    def star(self, end: str) -> Tuple[str, ...]:
+
+def Prefix_star(self, end: str) -> Tuple[str, ...]:
     paths = os.listdir(self.prefix_dir)
     return tuple(path for path in paths if path.endswith(end))
+
+
+# python 3.6.0 does not support methods on `typing.NamedTuple`
+Prefix.path = Prefix_path
+Prefix.exists = Prefix_exists
+Prefix.star = Prefix_star