155 lines
6.4 KiB
Python
155 lines
6.4 KiB
Python
# (c) 2012, Jan-Piet Mens <jpmens () gmail.com>
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#
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# This file is part of Ansible
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#
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# Ansible is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Ansible is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
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#
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# Make coding more python3-ish
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from __future__ import (absolute_import, division, print_function)
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__metaclass__ = type
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import os
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import sys
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import ast
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import traceback
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from collections import MutableMapping, MutableSet, MutableSequence
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from ansible.compat.six import string_types
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from ansible.parsing.yaml.loader import AnsibleLoader
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from ansible.plugins import fragment_loader
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try:
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from __main__ import display
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except ImportError:
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from ansible.utils.display import Display
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display = Display()
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# modules that are ok that they do not have documentation strings
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BLACKLIST_MODULES = frozenset((
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'async_wrapper',
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))
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def get_docstring(filename, verbose=False):
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"""
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Search for assignment of the DOCUMENTATION and EXAMPLES variables
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in the given file.
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Parse DOCUMENTATION from YAML and return the YAML doc or None
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together with EXAMPLES, as plain text.
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DOCUMENTATION can be extended using documentation fragments
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loaded by the PluginLoader from the module_docs_fragments
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directory.
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"""
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doc = None
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plainexamples = None
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returndocs = None
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metadata = None
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try:
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# Thank you, Habbie, for this bit of code :-)
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M = ast.parse(''.join(open(filename)))
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for child in M.body:
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if isinstance(child, ast.Assign):
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for t in child.targets:
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try:
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theid = t.id
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except AttributeError as e:
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# skip errors can happen when trying to use the normal code
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display.warning("Failed to assign id for %s on %s, skipping" % (t, filename))
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continue
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if 'DOCUMENTATION' == theid:
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doc = AnsibleLoader(child.value.s, file_name=filename).get_single_data()
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fragments = doc.get('extends_documentation_fragment', [])
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if isinstance(fragments, string_types):
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fragments = [ fragments ]
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# Allow the module to specify a var other than DOCUMENTATION
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# to pull the fragment from, using dot notation as a separator
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for fragment_slug in fragments:
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fragment_slug = fragment_slug.lower()
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if '.' in fragment_slug:
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fragment_name, fragment_var = fragment_slug.split('.', 1)
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fragment_var = fragment_var.upper()
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else:
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fragment_name, fragment_var = fragment_slug, 'DOCUMENTATION'
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fragment_class = fragment_loader.get(fragment_name)
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assert fragment_class is not None
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fragment_yaml = getattr(fragment_class, fragment_var, '{}')
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fragment = AnsibleLoader(fragment_yaml, file_name=filename).get_single_data()
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if 'notes' in fragment:
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notes = fragment.pop('notes')
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if notes:
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if 'notes' not in doc:
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doc['notes'] = []
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doc['notes'].extend(notes)
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if 'options' not in fragment:
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raise Exception("missing options in fragment (%s), possibly misformatted?: %s" % (fragment_name, filename))
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for key, value in fragment.items():
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if key not in doc:
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doc[key] = value
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else:
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if isinstance(doc[key], MutableMapping):
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doc[key].update(value)
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elif isinstance(doc[key], MutableSet):
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doc[key].add(value)
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elif isinstance(doc[key], MutableSequence):
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doc[key] = sorted(frozenset(doc[key] + value))
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else:
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raise Exception("Attempt to extend a documentation fragement (%s) of unknown type: %s" % (fragment_name, filename))
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elif 'EXAMPLES' == theid:
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plainexamples = child.value.s[1:] # Skip first empty line
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elif 'RETURN' == theid:
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returndocs = child.value.s[1:]
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elif 'ANSIBLE_METADATA' == theid:
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metadata = child.value
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if type(metadata).__name__ == 'Dict':
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metadata = ast.literal_eval(child.value)
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else:
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# try yaml loading
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metadata = AnsibleLoader(child.value.s, file_name=filename).get_single_data()
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if not isinstance(metadata, dict):
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display.warning("Invalid metadata detected in %s, using defaults" % filename)
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metadata = {'status': ['preview'], 'supported_by': 'community', 'version': '1.0'}
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except:
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display.error("unable to parse %s" % filename)
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if verbose is True:
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display.display("unable to parse %s" % filename)
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raise
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if not metadata:
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metadata = dict()
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# ensure metadata defaults
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# FUTURE: extract this into its own class for use by runtime metadata
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metadata['version'] = metadata.get('version', '1.0')
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metadata['status'] = metadata.get('status', ['preview'])
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metadata['supported_by'] = metadata.get('supported_by', 'community')
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return doc, plainexamples, returndocs, metadata
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