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Commit 57c2a08

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EliahKaganEliahKagan
committed
Don't return with operand when conceptually void
This changes `return None` to `return` where it appears in functions that are "conceptually void," i.e. cases where a function always returns None, its purpose is never to provide a return value to the caller, and it would be a bug (or at least confusing style) to use the return value or have the call as a subexpression. This is already the prevaling style, so this is a consistency improvement, as well as improving clarity by avoding giving the impression that "None" is significant in those cases. Of course, functions that sometimes return values other than None do not have "return None" replaced with a bare "return" statement. Those are left alone (when they return None, it means something). For the most part this is straightforward, but: - The handle_stderr local function in IndexFile.checkout is also slightly further refactored to better express what the early return is doing. - The "None" operand is removed as usual in GitConfigParser.read, even though a superclass has a same-named method with a return type that is not None. Usually when this happens, the superclass method returns something like Optional[T], and it is a case of return type covariance, in which case the None operands should still be written. Here, however, the overriding method does not intend to be an override: it has an incompatible signature and cannot be called as if it were the superclass method, nor is its return type compatible. - The "None" operand is *retained* in git.cmd.handle_process_output even though the return type is annotated as None, because the function also returns the expression `finalizer(process)`. The argument `finalizer` is itself annotated to return None, but it looks like the intent may be to play along with the strange case that `finalizer` returns a non-None value, and forward it.
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+16
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7 files changed

+16
-15
lines changed

‎git/cmd.py

Copy file name to clipboardExpand all lines: git/cmd.py
+2-2Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -528,13 +528,13 @@ def _terminate(self) -> None:
528528
try:
529529
if proc.poll() is not None:
530530
self.status = self._status_code_if_terminate or proc.poll()
531-
return None
531+
return
532532
except OSError as ex:
533533
log.info("Ignored error after process had died: %r", ex)
534534

535535
# It can be that nothing really exists anymore...
536536
if os is None or getattr(os, "kill", None) is None:
537-
return None
537+
return
538538

539539
# Try to kill it.
540540
try:

‎git/config.py

Copy file name to clipboardExpand all lines: git/config.py
+5-4Lines changed: 5 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -203,7 +203,8 @@ def __setitem__(self, key: str, value: _T) -> None:
203203
def add(self, key: str, value: Any) -> None:
204204
if key not in self:
205205
super().__setitem__(key, [value])
206-
return None
206+
return
207+
207208
super().__getitem__(key).append(value)
208209

209210
def setall(self, key: str, values: List[_T]) -> None:
@@ -579,7 +580,7 @@ def read(self) -> None: # type: ignore[override]
579580
:raise IOError: If a file cannot be handled
580581
"""
581582
if self._is_initialized:
582-
return None
583+
return
583584
self._is_initialized = True
584585

585586
files_to_read: List[Union[PathLike, IO]] = [""]
@@ -697,7 +698,7 @@ def write(self) -> None:
697698
a file lock"""
698699
self._assure_writable("write")
699700
if not self._dirty:
700-
return None
701+
return
701702

702703
if isinstance(self._file_or_files, (list, tuple)):
703704
raise AssertionError(
@@ -711,7 +712,7 @@ def write(self) -> None:
711712
"Skipping write-back of configuration file as include files were merged in."
712713
+ "Set merge_includes=False to prevent this."
713714
)
714-
return None
715+
return
715716
# END stop if we have include files
716717

717718
fp = self._file_or_files

‎git/index/base.py

Copy file name to clipboardExpand all lines: git/index/base.py
+4-4Lines changed: 4 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -166,7 +166,7 @@ def _set_cache_(self, attr: str) -> None:
166166
except OSError:
167167
# In new repositories, there may be no index, which means we are empty.
168168
self.entries: Dict[Tuple[PathLike, StageType], IndexEntry] = {}
169-
return None
169+
return
170170
# END exception handling
171171

172172
try:
@@ -1210,9 +1210,9 @@ def checkout(
12101210
def handle_stderr(proc: "Popen[bytes]", iter_checked_out_files: Iterable[PathLike]) -> None:
12111211
stderr_IO = proc.stderr
12121212
if not stderr_IO:
1213-
return None # Return early if stderr empty.
1214-
else:
1215-
stderr_bytes = stderr_IO.read()
1213+
return # Return early if stderr empty.
1214+
1215+
stderr_bytes = stderr_IO.read()
12161216
# line contents:
12171217
stderr = stderr_bytes.decode(defenc)
12181218
# git-checkout-index: this already exists

‎git/index/fun.py

Copy file name to clipboardExpand all lines: git/index/fun.py
+1-1Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -83,7 +83,7 @@ def run_commit_hook(name: str, index: "IndexFile", *args: str) -> None:
8383
"""
8484
hp = hook_path(name, index.repo.git_dir)
8585
if not os.access(hp, os.X_OK):
86-
return None
86+
return
8787

8888
env = os.environ.copy()
8989
env["GIT_INDEX_FILE"] = safe_decode(str(index.path))

‎git/objects/tree.py

Copy file name to clipboardExpand all lines: git/objects/tree.py
+1-1Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -68,7 +68,7 @@ def git_cmp(t1: TreeCacheTup, t2: TreeCacheTup) -> int:
6868

6969
def merge_sort(a: List[TreeCacheTup], cmp: Callable[[TreeCacheTup, TreeCacheTup], int]) -> None:
7070
if len(a) < 2:
71-
return None
71+
return
7272

7373
mid = len(a) // 2
7474
lefthalf = a[:mid]

‎git/objects/util.py

Copy file name to clipboardExpand all lines: git/objects/util.py
+2-2Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -500,8 +500,8 @@ def addToStack(
500500
depth: int,
501501
) -> None:
502502
lst = self._get_intermediate_items(item)
503-
if not lst: # empty list
504-
return None
503+
if not lst: # Empty list
504+
return
505505
if branch_first:
506506
stack.extendleft(TraverseNT(depth, i, src_item) for i in lst)
507507
else:

‎git/util.py

Copy file name to clipboardExpand all lines: git/util.py
+1-1Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -644,7 +644,7 @@ def _parse_progress_line(self, line: AnyStr) -> None:
644644
self.line_dropped(line_str)
645645
# Note: Don't add this line to the other lines, as we have to silently
646646
# drop it.
647-
return None
647+
return
648648
# END handle op code
649649

650650
# Figure out stage.

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