pw_status: Remove update_style.py

Since the status style migration is complete, remove update_style.py
(rather than fix the missing Python dependency on pw_presubmit).

Change-Id: Ie003544be49a3ea7ce62287cd531d5154e4b0037
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/30606
Pigweed-Auto-Submit: Wyatt Hepler <hepler@google.com>
Commit-Queue: Auto-Submit <auto-submit@pigweed.google.com.iam.gserviceaccount.com>
Reviewed-by: Keir Mierle <keir@google.com>
diff --git a/pw_status/py/BUILD.gn b/pw_status/py/BUILD.gn
index 7f4e01c..d7ee453 100644
--- a/pw_status/py/BUILD.gn
+++ b/pw_status/py/BUILD.gn
@@ -18,9 +18,6 @@
 
 pw_python_package("py") {
   setup = [ "setup.py" ]
-  sources = [
-    "pw_status/__init__.py",
-    "pw_status/update_style.py",
-  ]
+  sources = [ "pw_status/__init__.py" ]
   pylintrc = "$dir_pigweed/.pylintrc"
 }
diff --git a/pw_status/py/pw_status/update_style.py b/pw_status/py/pw_status/update_style.py
deleted file mode 100755
index 07ec756..0000000
--- a/pw_status/py/pw_status/update_style.py
+++ /dev/null
@@ -1,141 +0,0 @@
-#!/usr/bin/env python3
-# Copyright 2020 The Pigweed Authors
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may not
-# use this file except in compliance with the License. You may obtain a copy of
-# the License at
-#
-#     https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations under
-# the License.
-"""Updates pw::Status usages from Status::CODE to Status::Code() style.
-
-Also updates StatusWithSize.
-"""
-
-import argparse
-from pathlib import Path
-import re
-import sys
-from typing import Iterable
-
-from pw_presubmit import git_repo
-
-# Files in which to run replacements.
-_PATHSPECS = '*.h', '*.c', '*.cc', '*.cpp', '*.inc', '*.cxx', '*.hh', '*.py'
-
-_REMAP = {
-    # Exclude OK since it maps to OkStatus() instead of Status::Ok().
-    'CANCELLED': 'Cancelled',
-    'UNKNOWN': 'Unknown',
-    'INVALID_ARGUMENT': 'InvalidArgument',
-    'DEADLINE_EXCEEDED': 'DeadlineExceeded',
-    'NOT_FOUND': 'NotFound',
-    'ALREADY_EXISTS': 'AlreadyExists',
-    'PERMISSION_DENIED': 'PermissionDenied',
-    'UNAUTHENTICATED': 'Unauthenticated',
-    'RESOURCE_EXHAUSTED': 'ResourceExhausted',
-    'FAILED_PRECONDITION': 'FailedPrecondition',
-    'ABORTED': 'Aborted',
-    'OUT_OF_RANGE': 'OutOfRange',
-    'UNIMPLEMENTED': 'Unimplemented',
-    'INTERNAL': 'Internal',
-    'UNAVAILABLE': 'Unavailable',
-    'DATA_LOSS': 'DataLoss',
-}
-
-_CODES = '|'.join(_REMAP.keys())
-_FUNCTIONS = '|'.join(_REMAP.values())
-
-_STATUS_OK = re.compile(br'\bStatus::(?:OK\b|Ok\(\))')
-_STATUS_WITH_SIZE_CTOR = re.compile(
-    fr'\bStatusWithSize\(Status::({_CODES}),\s*'.encode())
-_STATUS = re.compile(fr'\b(Status|StatusWithSize)::({_CODES})(?!")\b'.encode())
-_STATUS_EQUALITY = re.compile(
-    fr'Status::(?P<l_func>{_FUNCTIONS})\(\)\s+==\s+(?P<value>[a-zA-Z0-9_.()]+)|'
-    fr'\s+==\s+(?:pw::)?Status::(?P<r_func>{_FUNCTIONS})\(\)'.encode())
-
-
-def _remap_status_with_size(match) -> bytes:
-    if match.group(1) == b'OK':
-        return b'StatusWithSize('
-
-    return f'StatusWithSize::{_REMAP[match.group(1).decode()]}('.encode()
-
-
-def _remap_codes(match) -> bytes:
-    status, code = (g.decode() for g in match.groups())
-    return f'{status}::{_REMAP[code]}()'.encode()
-
-
-def _remap_equality(match) -> bytes:
-    l_func, status, r_func = (g.decode() for g in match.groups(b''))
-    func = l_func or r_func
-    return (f'{status}.ok()'
-            if func == 'Ok' else f'{status}.Is{func}()').encode()
-
-
-def _parse_args():
-    """Parses and return command line arguments."""
-
-    parser = argparse.ArgumentParser(description=__doc__)
-    parser.add_argument('paths',
-                        nargs='*',
-                        type=Path,
-                        help='Paths to repositories')
-    return parser.parse_args()
-
-
-def update_status(paths: Iterable[Path]) -> None:
-    """Updates the Status style for a set of paths."""
-    if not paths:
-        paths = [Path.cwd()]
-
-    for path in paths:
-        if git_repo.has_uncommitted_changes(path):
-            raise RuntimeError('There are pending changes in the Git repo!')
-
-        updated = 0
-
-        for file in git_repo.list_files(pathspecs=_PATHSPECS, repo_path=path):
-            orig = file.read_bytes()
-
-            # Replace Status::OK and Status::Ok() with OkStatus().
-            text = _STATUS_OK.sub(b'OkStatus()', orig)
-
-            # Replace StatusWithSize::Ok with the constructor.
-            text = text.replace(b'StatusWithSize::Ok(', b'StatusWithSize(')
-
-            # Add `using pw::OkStatus` if `using pw::Status` is present.
-            text = text.replace(b'using pw::Status;',
-                                b'using pw::Status; using pw::OkStatus;')
-            text = text.replace(b'using ::pw::Status;',
-                                b'using ::pw::Status; using ::pw::OkStatus;')
-
-            # Replace StatusWithSize constructor
-            text = _STATUS_WITH_SIZE_CTOR.sub(_remap_status_with_size, text)
-
-            # Replace Status and StatusWithSize
-            text = _STATUS.sub(_remap_codes, text)
-
-            text = _STATUS_EQUALITY.sub(_remap_equality, text)
-
-            if orig != text:
-                updated += 1
-                file.write_bytes(text)
-
-    print('Updated', updated, 'files.')
-    print('Run pw format and manually inspect the changes!',
-          'This script is not perfect.')
-
-
-def main():
-    return update_status(**vars(_parse_args()))
-
-
-if __name__ == '__main__':
-    sys.exit(main())