Add types to submodule.util.py

2 files changed, 13 insertions, 10 deletions

diff --git a/git/config.py b/git/config.py
index 6931dd12..bfdfd916 100644
--- a/git/config.py
+++ b/git/config.py
@@ -38,6 +38,7 @@ from git.types import Lit_config_levels, ConfigLevels_Tup, PathLike, TBD, assert
 
 if TYPE_CHECKING:
     from git.repo.base import Repo
+    from io import BytesIO
 
 # -------------------------------------------------------------
 
@@ -274,7 +275,7 @@ class GitConfigParser(with_metaclass(MetaParserBuilder, cp.RawConfigParser, obje
     # list of RawConfigParser methods able to change the instance
     _mutating_methods_ = ("add_section", "remove_section", "remove_option", "set")
 
-    def __init__(self, file_or_files: Union[None, PathLike, IO, Sequence[Union[PathLike, IO]]] = None,
+    def __init__(self, file_or_files: Union[None, PathLike, BytesIO, Sequence[Union[PathLike, BytesIO]]] = None,
                  read_only: bool = True, merge_includes: bool = True,
                  config_level: Union[Lit_config_levels, None] = None,
                  repo: Union['Repo', None] = None) -> None:
@@ -303,7 +304,7 @@ class GitConfigParser(with_metaclass(MetaParserBuilder, cp.RawConfigParser, obje
             self._proxies = self._dict()
 
         if file_or_files is not None:
-            self._file_or_files: Union[PathLike, IO, Sequence[Union[PathLike, IO]]] = file_or_files
+            self._file_or_files: Union[PathLike, 'BytesIO', Sequence[Union[PathLike, 'BytesIO']]] = file_or_files
         else:
             if config_level is None:
                 if read_only:
@@ -650,7 +651,7 @@ class GitConfigParser(with_metaclass(MetaParserBuilder, cp.RawConfigParser, obje
             a file lock"""
         self._assure_writable("write")
         if not self._dirty:
-            return
+            return None
 
         if isinstance(self._file_or_files, (list, tuple)):
             raise AssertionError("Cannot write back if there is not exactly a single file to write to, have %i files"
@@ -675,7 +676,7 @@ class GitConfigParser(with_metaclass(MetaParserBuilder, cp.RawConfigParser, obje
             with open(fp, "wb") as fp_open:
                 self._write(fp_open)
         else:
-            fp = cast(IO, fp)
+            fp = cast(BytesIO, fp)
             fp.seek(0)
             # make sure we do not overwrite into an existing file
             if hasattr(fp, 'truncate'):
diff --git a/git/objects/submodule/util.py b/git/objects/submodule/util.py
index 1db473df..cde18d08 100644
--- a/git/objects/submodule/util.py
+++ b/git/objects/submodule/util.py
@@ -7,7 +7,7 @@ import weakref
 
 # typing -----------------------------------------------------------------------
 
-from typing import Any, TYPE_CHECKING, Union
+from typing import Any, Sequence, TYPE_CHECKING, Union
 
 from git.types import PathLike
 
@@ -16,6 +16,8 @@ if TYPE_CHECKING:
     from weakref import ReferenceType
     from git.repo import Repo
     from git.refs import Head
+    from git import Remote
+    from git.refs import RemoteReference
 
 
 __all__ = ('sm_section', 'sm_name', 'mkhead', 'find_first_remote_branch',
@@ -24,12 +26,12 @@ __all__ = ('sm_section', 'sm_name', 'mkhead', 'find_first_remote_branch',
 #{ Utilities
 
 
-def sm_section(name):
+def sm_section(name: str) -> str:
     """:return: section title used in .gitmodules configuration file"""
-    return 'submodule "%s"' % name
+    return f'submodule {name}'
 
 
-def sm_name(section):
+def sm_name(section: str) -> str:
     """:return: name of the submodule as parsed from the section name"""
     section = section.strip()
     return section[11:-1]
@@ -40,7 +42,7 @@ def mkhead(repo: 'Repo', path: PathLike) -> 'Head':
     return git.Head(repo, git.Head.to_full_path(path))
 
 
-def find_first_remote_branch(remotes, branch_name):
+def find_first_remote_branch(remotes: Sequence['Remote'], branch_name: str) -> 'RemoteReference':
     """Find the remote branch matching the name of the given branch or raise InvalidGitRepositoryError"""
     for remote in remotes:
         try:
@@ -99,7 +101,7 @@ class SubmoduleConfigParser(GitConfigParser):
 
     #{ Overridden Methods
     def write(self) -> None:
-        rval = super(SubmoduleConfigParser, self).write()
+        rval: None = super(SubmoduleConfigParser, self).write()
         self.flush_to_index()
         return rval
     # END overridden methods