ansible/test/sanity/yamllint/yamllinter.py

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#!/usr/bin/env python
"""Wrapper around yamllint that supports YAML embedded in Ansible modules."""
from __future__ import absolute_import, print_function
import ast
import json
import os
import sys
from yamllint import linter
from yamllint.config import YamlLintConfig
def main():
"""Main program body."""
paths = sys.argv[1:] or sys.stdin.read().splitlines()
checker = YamlChecker()
checker.check(paths)
checker.report()
class YamlChecker(object):
"""Wrapper around yamllint that supports YAML embedded in Ansible modules."""
def __init__(self):
self.messages = []
def report(self):
"""Print yamllint report to stdout."""
report = dict(
messages=self.messages,
)
print(json.dumps(report, indent=4, sort_keys=True))
def check(self, paths):
"""
:type paths: str
"""
yaml_conf = YamlLintConfig(file='test/sanity/yamllint/config/default.yml')
module_conf = YamlLintConfig(file='test/sanity/yamllint/config/modules.yml')
plugin_conf = YamlLintConfig(file='test/sanity/yamllint/config/plugins.yml')
for path in paths:
extension = os.path.splitext(path)[1]
with open(path) as f:
contents = f.read()
if extension in ('.yml', '.yaml'):
self.check_yaml(yaml_conf, path, contents)
elif extension == '.py':
if path.startswith('lib/ansible/plugins/'):
conf = plugin_conf
else:
conf = module_conf
self.check_module(conf, path, contents)
else:
raise Exception('unsupported extension: %s' % extension)
def check_yaml(self, conf, path, contents):
"""
:type conf: YamlLintConfig
:type path: str
:type contents: str
"""
self.messages += [self.result_to_message(r, path) for r in linter.run(contents, conf, path)]
def check_module(self, conf, path, contents):
"""
:type conf: YamlLintConfig
:type path: str
:type contents: str
"""
docs = self.get_module_docs(path, contents)
for key, value in docs.items():
yaml = value['yaml']
lineno = value['lineno']
if yaml.startswith('\n'):
yaml = yaml[1:]
lineno += 1
messages = list(linter.run(yaml, conf, path))
self.messages += [self.result_to_message(r, path, lineno - 1, key) for r in messages]
@staticmethod
def result_to_message(result, path, line_offset=0, prefix=''):
"""
:type result: any
:type path: str
:type line_offset: int
:type prefix: str
:rtype: dict[str, any]
"""
if prefix:
prefix = '%s: ' % prefix
return dict(
code=result.rule or result.level,
message=prefix + result.desc,
path=path,
line=result.line + line_offset,
column=result.column,
level=result.level,
)
def get_module_docs(self, path, contents):
"""
:type path: str
:type contents: str
:rtype: dict[str, any]
"""
module_doc_types = [
'DOCUMENTATION',
'EXAMPLES',
'RETURN',
]
docs = {}
def check_assignment(statement, doc_types=None):
"""Check the given statement for a documentation assignment."""
for target in statement.targets:
if isinstance(target, ast.Tuple):
continue
if doc_types and target.id not in doc_types:
continue
docs[target.id] = dict(
yaml=statement.value.s,
lineno=statement.lineno,
end_lineno=statement.lineno + len(statement.value.s.splitlines())
)
module_ast = self.parse_module(path, contents)
if not module_ast:
return {}
if path.startswith('lib/ansible/modules/') or path.startswith('lib/ansible/plugins/'):
for body_statement in module_ast.body:
if isinstance(body_statement, ast.Assign):
check_assignment(body_statement, module_doc_types)
elif path.startswith('lib/ansible/plugins/docs_fragments/'):
for body_statement in module_ast.body:
if isinstance(body_statement, ast.ClassDef):
for class_statement in body_statement.body:
if isinstance(class_statement, ast.Assign):
check_assignment(class_statement)
else:
raise Exception('unsupported path: %s' % path)
return docs
def parse_module(self, path, contents):
"""
:type path: str
:type contents: str
:rtype: ast.Module | None
"""
try:
return ast.parse(contents)
except SyntaxError as ex:
self.messages.append(dict(
code='python-syntax-error',
message=str(ex),
path=path,
line=ex.lineno,
column=ex.offset,
level='error',
))
except Exception as ex:
self.messages.append(dict(
code='python-parse-error',
message=str(ex),
path=path,
line=0,
column=0,
level='error',
))
return None
if __name__ == '__main__':
main()