Workflow for updating the Doxyfile

.changelog-bugfix.md

@@ -5,3 +5,4 @@
 - The presentation of algorithmic parameters in the documentation has been improved.
 - Outdated GitHub Actions can now be printed via the build target `check_github_actions`. Alternatively, the build target `update_github_actions` may be used to update them automatically.
 - Continuous Integration is now used to automatically update outdated GitHub Actions on a regular schedule.
+- Continuous Integration is now used to periodically update the Doxygen configuration file used for generating API documentations for C++ code.

.github/workflows/update_doxyfile.yml

@@ -0,0 +1,62 @@
+---
+name: Update Doxyfile
+on:
+  pull_request:
+    types:
+      - opened
+      - reopened
+      - synchronize
+    paths:
+      - .github/workflows/update_doxyfile.yml
+      - build
+      - build.bat
+      - build_system/main.py
+      - build_system/core/**
+      - build_system/util/**
+      - build_system/targets/paths.py
+      - build_system/targets/documentation/*
+      - build_system/targets/documentation/cpp/*
+  schedule:
+    - cron: 0 5 2 * *
+  workflow_dispatch:
+jobs:
+  update_doxyfile:
+    name: Update Doxyfile
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          ref: bugfix
+      - name: Setup Python
+        uses: actions/setup-python@v5
+        with:
+          python-version-file: .version-python
+      - name: Setup git
+        uses: fregante/setup-git-user@v2
+      - name: Generate token
+        uses: actions/create-github-app-token@v1
+        id: app-token
+        with:
+          app-id: ${{ secrets.TOKEN_APP_ID }}
+          private-key: ${{ secrets.TOKEN_APP_SECRET }}
+      - name: Update Doxyfile
+        run: |
+          ./build update_doxyfile
+          git add build_system/targets/documentation/cpp/Doxyfile
+      - name: Submit pull request
+        id: pull-request
+        uses: peter-evans/create-pull-request@v7
+        with:
+          token: ${{ steps.app-token.outputs.token }}
+          commit-message: Update Doxyfile.
+          branch: update-doxyfile
+          title: Update Doxyfile
+          labels: bot
+          assignees: mrapp-ke
+          body: Update the Doxygen configuration file.
+      - name: Enable auto-merge
+        if: ${{ steps.pull-request.outputs.pull-request-operation == 'created' }}
+        env:
+          GH_TOKEN: ${{ steps.app-token.outputs.token }}
+        run: gh pr merge --merge --auto "${{ steps.pull-request.outputs.pull-request-number }}"

.github/workflows/update_github_actions.yml

@@ -7,7 +7,7 @@ on:
       - reopened
       - synchronize
     paths:
-      - .github/workflows/test_changelog.yml
+      - .github/workflows/update_github_actions.yml
       - build
       - build.bat
       - build_system/main.py

build_system/targets/dependencies/github/actions.py

@@ -178,7 +178,7 @@ def update_actions(self, *updated_actions: Action):
         self.write_lines(*updated_lines)
 
     def write_lines(self, *lines: str):
-        super().write_lines(lines)
+        super().write_lines(*lines)
 
         try:
             del self.uses_clauses
@@ -261,7 +261,7 @@ def __query_latest_action_version(self, action: Action) -> ActionVersion:
 
         try:
             latest_tag = GithubApi(self.build_unit) \
-                .set_token(self.__get_github_token()) \
+                .set_token(self.github_token) \
                 .open_repository(repository_name) \
                 .get_latest_release_tag()
 

build_system/targets/dependencies/github/pyyaml.py

@@ -33,10 +33,11 @@ def yaml_dict(self) -> Dict:
         # pylint: disable=import-outside-toplevel
         import yaml
         with read_file(self.file) as file:
-            return yaml.load(file.read(), Loader=yaml.CLoader)
+            yaml_dict = yaml.load(file.read(), Loader=yaml.CLoader)
+            return yaml_dict if yaml_dict else {}
 
     def write_lines(self, *lines: str):
-        super().write_lines(lines)
+        super().write_lines(*lines)
 
         try:
             del self.yaml_dict

build_system/targets/documentation/cpp/__init__.py

@@ -9,7 +9,7 @@
 from core.targets import TargetBuilder
 
 from targets.documentation.cpp.modules import CppApidocModule
-from targets.documentation.cpp.targets import ApidocCpp, ApidocIndexCpp
+from targets.documentation.cpp.targets import ApidocCpp, ApidocIndexCpp, UpdateDoxyfile
 from targets.paths import Project
 
 APIDOC_CPP = 'apidoc_cpp'
@@ -22,6 +22,8 @@
     .add_build_target(APIDOC_CPP_INDEX) \
         .depends_on(APIDOC_CPP) \
         .set_runnables(ApidocIndexCpp()) \
+    .add_phony_target('update_doxyfile') \
+        .set_runnables(UpdateDoxyfile()) \
     .build()
 
 MODULES = [

build_system/targets/documentation/cpp/doxygen.py

@@ -8,12 +8,22 @@
 
 from core.build_unit import BuildUnit
 from util.env import set_env
-from util.io import create_directories
+from util.io import create_directories, delete_files
 from util.run import Program
 
 from targets.documentation.cpp.modules import CppApidocModule
 
 
+def get_doxyfile(build_unit: BuildUnit) -> str:
+    """
+    Returns the path to the Doxyfile.
+
+    :param build_unit:  The build unit, the Doxyfile belong to
+    :return:            The path to the Doxyfile
+    """
+    return path.join(build_unit.root_directory, 'Doxyfile')
+
+
 class Doxygen(Program):
     """
     Allows to run the external program "doxygen".
@@ -33,7 +43,7 @@ def __init__(self, build_unit: BuildUnit, module: CppApidocModule):
         :param build_unit:  The build unit from which the program should be run
         :param module:      The module, the program should be applied to
         """
-        super().__init__('doxygen', path.join(build_unit.root_directory, 'Doxyfile'))
+        super().__init__('doxygen', get_doxyfile(build_unit))
         self.module = module
         self.print_arguments(True)
         self.install_program(False)
@@ -42,3 +52,22 @@ def __init__(self, build_unit: BuildUnit, module: CppApidocModule):
 
     def _before(self):
         create_directories(self.module.output_directory)
+
+
+class DoxygenUpdate(Program):
+    """
+    Allows to run the external program "doxygen -u".
+    """
+
+    def __init__(self, build_unit: BuildUnit):
+        """
+        :param build_unit: The build unit from which the program should be run
+        """
+        super().__init__('doxygen', '-u', get_doxyfile(build_unit))
+        self.print_arguments(True)
+        self.install_program(False)
+        self.set_build_unit(build_unit)
+        self.build_unit = build_unit
+
+    def _after(self):
+        delete_files(get_doxyfile(self.build_unit) + '.bak')

build_system/targets/documentation/cpp/targets.py

@@ -7,11 +7,11 @@
 
 from core.build_unit import BuildUnit
 from core.modules import Module
-from core.targets import BuildTarget
+from core.targets import BuildTarget, PhonyTarget
 from util.log import Log
 
 from targets.documentation.cpp.breathe_apidoc import BreatheApidoc
-from targets.documentation.cpp.doxygen import Doxygen
+from targets.documentation.cpp.doxygen import Doxygen, DoxygenUpdate
 from targets.documentation.cpp.modules import CppApidocModule
 from targets.documentation.targets import ApidocIndex
 
@@ -49,3 +49,16 @@ class ApidocIndexCpp(ApidocIndex):
 
     def __init__(self):
         super().__init__(MODULE_FILTER)
+
+
+class UpdateDoxyfile(PhonyTarget.Runnable):
+    """
+    Updates the Doxyfile used for generating API documentations for C++ code.
+    """
+
+    def __init__(self):
+        super().__init__(MODULE_FILTER)
+
+    def run_all(self, build_unit: BuildUnit, _: List[Module]):
+        Log.info('Updating Doxyfile in directory "%s"...', build_unit.root_directory)
+        DoxygenUpdate(build_unit).run()

build_system/targets/versioning/changelog.py

@@ -182,7 +182,7 @@ def validate(self):
         self.__validate_line(current_line=None, previous_line=previous_line)
 
     def write_lines(self, *lines: str):
-        super().write_lines(lines)
+        super().write_lines(*lines)
 
         try:
             del self.parsed_lines

build_system/targets/versioning/versioning.py

@@ -102,7 +102,7 @@ def update(self, version: Version):
         Log.info('Updated version to "%s"', str(version))
 
     def write_lines(self, *lines: str):
-        super().write_lines(lines)
+        super().write_lines(*lines)
 
         try:
             del self.version
@@ -140,7 +140,7 @@ def update(self, development_version: int):
         Log.info('Updated development version to "%s"', str(development_version))
 
     def write_lines(self, *lines: str):
-        super().write_lines(lines)
+        super().write_lines(*lines)
 
         try:
             del self.development_version

doc/developer_guide/continuous_integration.md

@@ -46,3 +46,4 @@ The following CI jobs are used for building our software for different target pl
 The CI jobs listed below are run periodically to perform different maintenance tasks, such as the automatic update of dependencies.
 
 - `update_github_actions.yml` checks for outdated GitHub Actions used in workflow definition files. In cases where any updates are necessary, a pull request with the respective changes is opened. If the pull request passes all {ref}`necessary checks <ci-testing>`, it is merged automatically. Otherwise, manual intervention is needed.
+- `update_doxyfile.yml` updates the [Doxygen](https://sourceforge.net/projects/doxygen/) configuration file, required for generating API documentations for C++ code, to stay up-to-date as new versions of this software are released.