build: use yamlfix for yaml formatting

pyproject.toml

@@ -52,10 +52,12 @@ dev = [
   "pytest-rerunfailures",
   "pytest-cov>=6.0.0",
   # linting:
-  "autopep8",
   "ruff",
   "mypy",
   "basedpyright",
+  # formatting
+  "autopep8",
+  "yamlfix",
   # packaging:
   "pyinstaller",
   "platformdirs", # required by pyinstaller
@@ -78,13 +80,22 @@ write_to = "kleinanzeigen_bot/_version.py"
 write_template = "__version__ = '{}'\n"
 
 [tool.pdm.scripts]  # https://pdm-project.org/latest/usage/scripts/
-app     = "python -m kleinanzeigen_bot"
+app   = "python -m kleinanzeigen_bot"
+debug = "python -m pdb -m kleinanzeigen_bot"
+
 compile.cmd = "python -O -m PyInstaller pyinstaller.spec --clean"
 compile.env = {PYTHONHASHSEED = "1", SOURCE_DATE_EPOCH = "0"}  # https://pyinstaller.org/en/stable/advanced-topics.html#creating-a-reproducible-build
-debug   = "python -m pdb -m kleinanzeigen_bot"
-format  = {shell = "autopep8 --recursive --in-place scripts src tests --verbose && python scripts/post_autopep8.py scripts src tests" }
-lint    = {shell = "ruff check --preview && mypy && basedpyright" }
-fix     = {shell = "ruff check --preview --fix" }
+
+format = { composite = ["format:py", "format:yaml"] }
+"format:py"   = { shell = "autopep8 --recursive --in-place scripts src tests --verbose && python scripts/post_autopep8.py scripts src tests" }
+"format:yaml" = "yamlfix scripts/ src/ tests/"
+
+lint = { composite = ["lint:ruff", "lint:mypy", "lint:pyright"] }
+"lint:ruff"    = "ruff check --preview"
+"lint:mypy"    = "mypy"
+"lint:pyright" = "basedpyright"
+"lint:fix"     = {shell = "ruff check --preview --fix" }
+
 test    = "python -m pytest --capture=tee-sys -v"
 utest   = "python -m pytest --capture=tee-sys -v -m 'not itest'"
 itest   = "python -m pytest --capture=tee-sys -v -m 'itest'"
@@ -228,6 +239,10 @@ ignore = [
 notice-rgx = "SPDX-FileCopyrightText: .*"
 min-file-size = 256
 
+
+[tool.ruff.lint.isort]
+# combine-straight-imports = true # not (yet) supported by ruff
+
 [tool.ruff.lint.pylint]
 # https://pylint.pycqa.org/en/latest/user_guide/configuration/all-options.html#design-checker
 # https://pylint.pycqa.org/en/latest/user_guide/checkers/features.html#design-checker-messages
@@ -299,3 +314,23 @@ filterwarnings = [
   "ignore:Exception ignored in:pytest.PytestUnraisableExceptionWarning",
   "ignore::DeprecationWarning"
 ]
+
+
+#####################
+# yamlfix
+# https://lyz-code.github.io/yamlfix/
+#####################
+[tool.yamlfix]
+allow_duplicate_keys = true
+comments_min_spaces_from_content = 2
+comments_require_starting_space = false # FIXME should be true but rule is buggy
+comments_whitelines = 1
+section_whitelines = 1
+explicit_start = false
+indentation = 2
+line_length = 1024
+preserve_quotes = true
+quote_basic_values = false
+quote_keys_and_basic_values = false
+quote_representation = '"'
+whitelines = 1