feat: ros include guard

Signed-off-by: Takagi, Isamu <isamu.takagi@tier4.jp>

.pre-commit-hooks.yaml

@@ -28,3 +28,10 @@
   entry: sort-package-xml
   language: python
   files: package.xml$
+
+- id: ros-include-guard
+  name: check include guard
+  description: Check include guard identifier
+  entry: ros-include-guard
+  language: python
+  files: .*\.(h|hpp)$

README.md

@@ -15,6 +15,7 @@ repos:
       - id: prettier-launch-xml
       - id: prettier-package-xml
       - id: sort-package-xml
+      - id: ros-include-guard
 ```
 
 ## Hooks available
@@ -40,6 +41,11 @@ If you want to exclude a tag from sorting, add `<! -- no format -->` at the begi
 <!-- no format --> <depend>rclcpp</depend>
 ```
 
+### ros-include-guard
+
+Fix the macro name of include guards.
+If you want to disable this check, use `--allow-nolint` option and comment `NOLINT` on the same line.
+
 <!-- Links -->
 
 [ros]: https://ros.org/

pre_commit_hooks/ros_include_guard.py

@@ -0,0 +1,154 @@
+# Copyright 2022 Tier IV, Inc. All rights reserved.
+#
+# 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
+#
+#     http://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.
+
+import argparse
+import pathlib
+import re
+
+
+class Directive:
+
+  def __init__(self):
+    self.line = None
+    self.text = None
+    self.expected = None
+    self.tokens = None
+    self.nolint = False
+
+  def update(self, line, text):
+    self.line = line
+    self.text = text
+
+  def is_none(self):
+    return self.line is None
+
+  def mismatch(self):
+    if self.nolint: return False
+    return self.text != self.expected
+
+  def overwrite(self, lines):
+    if self.nolint: return
+    lines[self.line] = self.expected
+
+
+class OpeningDirective(Directive):
+
+  def prepare(self, macro_name, allow_nolint):
+    self.tokens = re.split(R'\b', self.text)
+    if 4 <= len(self.tokens):
+      self.tokens[3] = macro_name
+      self.expected = ''.join(self.tokens)
+    self.nolint = allow_nolint and ('NOLINT' in self.tokens)
+
+
+class ClosingDirective(Directive):
+
+  def prepare(self, macro_name, allow_nolint):
+    self.tokens = re.split(R'\b', self.text)
+    self.expected = '#endif  // {}'.format(macro_name)
+    self.nolint = allow_nolint and ('NOLINT' in self.tokens)
+
+
+class IncludeGuard:
+
+  def __init__(self):
+    self.ifndef = OpeningDirective()
+    self.define = OpeningDirective()
+    self.endif  = ClosingDirective()
+    self.pragma = False
+
+  def items(self):
+    yield self.ifndef
+    yield self.define
+    yield self.endif
+
+  def is_none(self):
+    return any(item.is_none() for item in self.items())
+
+  def mismatch(self):
+    return any(item.mismatch() for item in self.items())
+
+  def overwrite(self, lines):
+    return any(item.overwrite(lines) for item in self.items())
+
+  def prepare(self, macro_name, allow_nolint):
+    for item in self.items(): item.prepare(macro_name, allow_nolint)
+
+
+def get_include_guard_info(lines):
+
+  guard = IncludeGuard()
+  for line, text in enumerate(lines):
+    if text.startswith('#pragma once'):
+      guard.pragma = True
+    if text.startswith('#ifndef') and guard.ifndef.is_none():
+      guard.ifndef.update(line, text)
+    if text.startswith('#define') and guard.define.is_none():
+      guard.define.update(line, text)
+    if text.startswith('#endif'):
+      guard.endif.update(line, text)
+  return guard
+
+
+def get_parts_after(parts: list, targets: set):
+  result = []
+  for part in reversed(parts):
+    if part in targets:
+      break
+    result.append(part)
+  return reversed(result)
+
+
+def get_include_guard_macro_name(filepath: pathlib.Path):
+  targets = {'include', 'src'}
+  for path in filepath.parents:
+      if path.joinpath('package.xml').exists():
+          parts = get_parts_after(filepath.relative_to(path).parts, targets)
+          return '__'.join(parts).replace('.', '_').upper() + '_'
+  return None
+
+
+def main(argv=None):
+
+  parser = argparse.ArgumentParser()
+  parser.add_argument('filenames', nargs='*', help='Filenames to fix')
+  parser.add_argument('--allow-nolint', action='store_true', help='Allow nolint comment')
+  args = parser.parse_args(argv)
+
+  return_code = 0
+  for filename in args.filenames:
+    filepath = pathlib.Path(filename)
+    macro_name = get_include_guard_macro_name(filepath)
+    if macro_name:
+      lines = filepath.read_text().split('\n')
+      guard = get_include_guard_info(lines)
+      if guard.pragma:
+        continue
+      if guard.is_none():
+        return_code = 1
+        print('No include guard in {}'.format(filepath))
+        continue
+      guard.prepare(macro_name, args.allow_nolint)
+      if guard.mismatch():
+        return_code = 1
+        print('Fix include guard in {}'.format(filepath))
+        guard.overwrite(lines)
+        filepath.write_text('\n'.join(lines))
+        continue
+
+  return return_code
+
+
+if __name__ == '__main__':
+  exit(main())

setup.cfg

@@ -13,3 +13,4 @@ python_requires = >=3.8
 [options.entry_points]
 console_scripts =
     sort-package-xml = pre_commit_hooks.sort_package_xml:main
+    ros-include-guard = pre_commit_hooks.ros_include_guard:main