Add yamllint to antsibull-nox and add config files.

.gitignore

@@ -4,6 +4,7 @@
 
 /tests/output/
 /changelogs/.plugin-cache.yaml
+/tests/integration/inventory
 
 # Byte-compiled / optimized / DLL files
 __pycache__/

.yamllint

@@ -0,0 +1,53 @@
+---
+# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
+# SPDX-License-Identifier: GPL-3.0-or-later
+# SPDX-FileCopyrightText: 2025 Felix Fontein <felix@fontein.de>
+
+extends: default
+
+ignore: |
+  /changelogs/
+
+rules:
+  line-length:
+    max: 300
+    level: error
+  document-start:
+    present: true
+  document-end: false
+  truthy:
+    level: error
+    allowed-values:
+      - 'true'
+      - 'false'
+  indentation:
+    spaces: 2
+    indent-sequences: true
+  key-duplicates: enable
+  trailing-spaces: enable
+  new-line-at-end-of-file: disable
+  hyphens:
+    max-spaces-after: 1
+  empty-lines:
+    max: 2
+    max-start: 0
+    max-end: 0
+  commas:
+    max-spaces-before: 0
+    min-spaces-after: 1
+    max-spaces-after: 1
+  colons:
+    max-spaces-before: 0
+    max-spaces-after: 1
+  brackets:
+    min-spaces-inside: 0
+    max-spaces-inside: 0
+  braces:
+    min-spaces-inside: 0
+    max-spaces-inside: 1
+  #octal-values:
+  #  forbid-implicit-octal: true
+  #  forbid-explicit-octal: true
+  comments:
+    min-spaces-from-content: 1
+  comments-indentation: false

.yamllint-docs

@@ -0,0 +1,54 @@
+---
+# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
+# SPDX-License-Identifier: GPL-3.0-or-later
+# SPDX-FileCopyrightText: 2025 Felix Fontein <felix@fontein.de>
+
+extends: default
+
+ignore: |
+  /changelogs/
+
+rules:
+  line-length:
+    max: 160
+    level: error
+  document-start:
+    present: false
+  document-end:
+    present: false
+  truthy:
+    level: error
+    allowed-values:
+      - 'true'
+      - 'false'
+  indentation:
+    spaces: 2
+    indent-sequences: true
+  key-duplicates: enable
+  trailing-spaces: enable
+  new-line-at-end-of-file: disable
+  hyphens:
+    max-spaces-after: 1
+  empty-lines:
+    max: 2
+    max-start: 0
+    max-end: 0
+  commas:
+    max-spaces-before: 0
+    min-spaces-after: 1
+    max-spaces-after: 1
+  colons:
+    max-spaces-before: 0
+    max-spaces-after: 1
+  brackets:
+    min-spaces-inside: 0
+    max-spaces-inside: 0
+  braces:
+    min-spaces-inside: 0
+    max-spaces-inside: 1
+  octal-values:
+    forbid-implicit-octal: true
+    forbid-explicit-octal: true
+  comments:
+    min-spaces-from-content: 1
+  comments-indentation: false

.yamllint-examples

@@ -0,0 +1,54 @@
+---
+# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
+# SPDX-License-Identifier: GPL-3.0-or-later
+# SPDX-FileCopyrightText: 2025 Felix Fontein <felix@fontein.de>
+
+extends: default
+
+ignore: |
+  /changelogs/
+
+rules:
+  line-length:
+    max: 160
+    level: error
+  document-start:
+    present: true
+  document-end:
+    present: false
+  truthy:
+    level: error
+    allowed-values:
+      - 'true'
+      - 'false'
+  indentation:
+    spaces: 2
+    indent-sequences: true
+  key-duplicates: enable
+  trailing-spaces: enable
+  new-line-at-end-of-file: disable
+  hyphens:
+    max-spaces-after: 1
+  empty-lines:
+    max: 2
+    max-start: 0
+    max-end: 0
+  commas:
+    max-spaces-before: 0
+    min-spaces-after: 1
+    max-spaces-after: 1
+  colons:
+    max-spaces-before: 0
+    max-spaces-after: 1
+  brackets:
+    min-spaces-inside: 0
+    max-spaces-inside: 0
+  braces:
+    min-spaces-inside: 0
+    max-spaces-inside: 1
+  #octal-values:
+  #  forbid-implicit-octal: true
+  #  forbid-explicit-octal: true
+  comments:
+    min-spaces-from-content: 1
+  comments-indentation: false

antsibull-nox.toml

@@ -8,6 +8,17 @@
 
 [sessions]
 
+[sessions.lint]
+run_isort = false
+run_black = false
+run_flake8 = false
+run_pylint = false
+run_yamllint = true
+yamllint_config = ".yamllint"
+yamllint_config_plugins = ".yamllint-docs"
+yamllint_config_plugins_examples = ".yamllint-examples"
+run_mypy = false
+
 [sessions.docs_check]
 validate_collection_refs="all"