scripts: compliance: add support for YAMLLint

Add a YAMLLint compliance check that uses the yamllint package to report
linting error on YAML files.

Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>

.github/workflows/compliance.yml

@@ -27,7 +27,7 @@ jobs:
       run: |
         pip3 install setuptools
         pip3 install wheel
-        pip3 install python-magic lxml junitparser gitlint pylint pykwalify
+        pip3 install python-magic lxml junitparser gitlint pylint pykwalify yamllint
         pip3 install west
 
     - name: west setup

.yamllint

@@ -0,0 +1,16 @@
+# SPDX-License-Identifier: Apache-2.0
+
+extends: default
+
+rules:
+  line-length:
+    max: 100
+  comments:
+    min-spaces-from-content: 1
+  indentation:
+    spaces: 2
+    indent-sequences: consistent
+  document-start:
+    present: false
+  truthy:
+    check-keys: false

scripts/ci/check_compliance.py

@@ -17,6 +17,8 @@ import tempfile
 import traceback
 import shlex
 
+from yamllint import config, linter
+
 from junitparser import TestCase, TestSuite, JUnitXml, Skipped, Error, Failure
 import magic
 
@@ -991,6 +993,36 @@ class MaintainersFormat(ComplianceTest):
                 self.failure(f"Error parsing {file}: {ex}")
 
 
+class YAMLLint(ComplianceTest):
+    """
+    YAMLLint
+    """
+    name = "YAMLLint"
+    doc = "Check YAML files with YAMLLint."
+    path_hint = "<git-top>"
+
+    def run(self):
+        config_file = os.path.join(ZEPHYR_BASE, ".yamllint")
+
+        for file in get_files(filter="d"):
+            if Path(file).suffix not in ['.yaml', '.yml']:
+                continue
+
+            yaml_config = config.YamlLintConfig(file=config_file)
+
+            if file.startswith(".github/"):
+                # Tweak few rules for workflow files.
+                yaml_config.rules["line-length"] = False
+                yaml_config.rules["truthy"]["allowed-values"].extend(['on', 'off'])
+            elif file == ".codecov.yml":
+                yaml_config.rules["truthy"]["allowed-values"].extend(['yes', 'no'])
+
+            with open(file, 'r') as fp:
+                for p in linter.run(fp, yaml_config):
+                    self.fmtd_failure('warning', f'YAMLLint ({p.rule})', file,
+                                      p.line, col=p.column, desc=p.desc)
+
+
 def init_logs(cli_arg):
     # Initializes logging
 

scripts/requirements-compliance.txt

@@ -6,3 +6,4 @@ python-magic-bin; sys_platform == "win32"
 lxml
 junitparser>=2
 pylint
+yamllint