From 2d1a7761386574455ff98112fe4341cbe22d775e Mon Sep 17 00:00:00 2001
From: Kenny Woodson <kwoodson@redhat.com>
Date: Tue, 3 Jan 2017 10:22:47 -0500
Subject: Adding ability to systematically modify yaml from ansible.
---
roles/lib_utils/library/yedit.py | 766 +++++++++++++++++++++++++++++++++++++++
1 file changed, 766 insertions(+)
create mode 100644 roles/lib_utils/library/yedit.py
(limited to 'roles/lib_utils/library')
diff --git a/roles/lib_utils/library/yedit.py b/roles/lib_utils/library/yedit.py
new file mode 100644
index 000000000..fb545c7c8
--- /dev/null
+++ b/roles/lib_utils/library/yedit.py
@@ -0,0 +1,766 @@
+#!/usr/bin/env python
+# pylint: disable=missing-docstring
+# ___ ___ _ _ ___ ___ _ _____ ___ ___
+# / __| __| \| | __| _ \ /_\_ _| __| \
+# | (_ | _|| .` | _|| / / _ \| | | _|| |) |
+# \___|___|_|\_|___|_|_\/_/_\_\_|_|___|___/_ _____
+# | \ / _ \ | \| |/ _ \_ _| | __| \_ _|_ _|
+# | |) | (_) | | .` | (_) || | | _|| |) | | | |
+# |___/ \___/ |_|\_|\___/ |_| |___|___/___| |_|
+#
+# Copyright 2016 Red Hat, Inc. and/or its affiliates
+# and other contributors as indicated by the @author tags.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+
+# pylint: disable=wrong-import-order
+import json
+import os
+import re
+# pylint: disable=import-error
+import ruamel.yaml as yaml
+import shutil
+from ansible.module_utils.basic import AnsibleModule
+
+DOCUMENTATION = '''
+---
+module: yedit
+short_description: Create, modify, and idempotently manage yaml files.
+description:
+ - Modify yaml files programmatically.
+options:
+ state:
+ description:
+ - State represents whether to create, modify, delete, or list yaml
+ required: true
+ default: present
+ choices: ["present", "absent", "list"]
+ aliases: []
+ debug:
+ description:
+ - Turn on debug information.
+ required: false
+ default: false
+ aliases: []
+ src:
+ description:
+ - The file that is the target of the modifications.
+ required: false
+ default: None
+ aliases: []
+ content:
+ description:
+ - Content represents the yaml content you desire to work with. This
+ - could be the file contents to write or the inmemory data to modify.
+ required: false
+ default: None
+ aliases: []
+ content_type:
+ description:
+ - The python type of the content parameter.
+ required: false
+ default: 'dict'
+ aliases: []
+ key:
+ description:
+ - The path to the value you wish to modify. Emtpy string means the top of
+ - the document.
+ required: false
+ default: ''
+ aliases: []
+ value:
+ description:
+ - The incoming value of parameter 'key'.
+ required: false
+ default:
+ aliases: []
+ value_type:
+ description:
+ - The python type of the incoming value.
+ required: false
+ default: ''
+ aliases: []
+ update:
+ description:
+ - Whether the update should be performed on a dict/hash or list/array
+ - object.
+ required: false
+ default: false
+ aliases: []
+ append:
+ description:
+ - Whether to append to an array/list. When the key does not exist or is
+ - null, a new array is created. When the key is of a non-list type,
+ - nothing is done.
+ required: false
+ default: false
+ aliases: []
+ index:
+ description:
+ - Used in conjunction with the update parameter. This will update a
+ - specific index in an array/list.
+ required: false
+ default: false
+ aliases: []
+ curr_value:
+ description:
+ - Used in conjunction with the update parameter. This is the current
+ - value of 'key' in the yaml file.
+ required: false
+ default: false
+ aliases: []
+ curr_value_format:
+ description:
+ - Format of the incoming current value.
+ choices: ["yaml", "json", "str"]
+ required: false
+ default: false
+ aliases: []
+ backup:
+ description:
+ - Whether to make a backup copy of the current file when performing an
+ - edit.
+ required: false
+ default: true
+ aliases: []
+author:
+- "Kenny Woodson <kwoodson@redhat.com>"
+extends_documentation_fragment: []
+'''
+
+EXAMPLES = '''
+# Simple insert of key, value
+- name: insert simple key, value
+ yedit:
+ src: somefile.yml
+ key: test
+ value: somevalue
+ state: present
+# Results:
+# test: somevalue
+
+# Multilevel insert of key, value
+- name: insert simple key, value
+ yedit:
+ src: somefile.yml
+ key: a#b#c
+ value: d
+ state: present
+# Results:
+# a:
+# b:
+# c: d
+'''
+
+
+class YeditException(Exception):
+ ''' Exception class for Yedit '''
+ pass
+
+
+class Yedit(object):
+ ''' Class to modify yaml files '''
+ re_valid_key = r"(((\[-?\d+\])|([0-9a-zA-Z%s/_-]+)).?)+$"
+ re_key = r"(?:\[(-?\d+)\])|([0-9a-zA-Z%s/_-]+)"
+ com_sep = set(['.', '#', '|', ':'])
+
+ # pylint: disable=too-many-arguments
+ def __init__(self,
+ filename=None,
+ content=None,
+ content_type='yaml',
+ separator='.',
+ backup=False):
+ self.content = content
+ self._separator = separator
+ self.filename = filename
+ self.__yaml_dict = content
+ self.content_type = content_type
+ self.backup = backup
+ self.load(content_type=self.content_type)
+ if self.__yaml_dict is None:
+ self.__yaml_dict = {}
+
+ @property
+ def separator(self):
+ ''' getter method for yaml_dict '''
+ return self._separator
+
+ @separator.setter
+ def separator(self):
+ ''' getter method for yaml_dict '''
+ return self._separator
+
+ @property
+ def yaml_dict(self):
+ ''' getter method for yaml_dict '''
+ return self.__yaml_dict
+
+ @yaml_dict.setter
+ def yaml_dict(self, value):
+ ''' setter method for yaml_dict '''
+ self.__yaml_dict = value
+
+ @staticmethod
+ def parse_key(key, sep='.'):
+ '''parse the key allowing the appropriate separator'''
+ common_separators = list(Yedit.com_sep - set([sep]))
+ return re.findall(Yedit.re_key % ''.join(common_separators), key)
+
+ @staticmethod
+ def valid_key(key, sep='.'):
+ '''validate the incoming key'''
+ common_separators = list(Yedit.com_sep - set([sep]))
+ if not re.match(Yedit.re_valid_key % ''.join(common_separators), key):
+ return False
+
+ return True
+
+ @staticmethod
+ def remove_entry(data, key, sep='.'):
+ ''' remove data at location key '''
+ if key == '' and isinstance(data, dict):
+ data.clear()
+ return True
+ elif key == '' and isinstance(data, list):
+ del data[:]
+ return True
+
+ if not (key and Yedit.valid_key(key, sep)) and \
+ isinstance(data, (list, dict)):
+ return None
+
+ key_indexes = Yedit.parse_key(key, sep)
+ for arr_ind, dict_key in key_indexes[:-1]:
+ if dict_key and isinstance(data, dict):
+ data = data.get(dict_key, None)
+ elif (arr_ind and isinstance(data, list) and
+ int(arr_ind) <= len(data) - 1):
+ data = data[int(arr_ind)]
+ else:
+ return None
+
+ # process last index for remove
+ # expected list entry
+ if key_indexes[-1][0]:
+ if isinstance(data, list) and int(key_indexes[-1][0]) <= len(data) - 1: # noqa: E501
+ del data[int(key_indexes[-1][0])]
+ return True
+
+ # expected dict entry
+ elif key_indexes[-1][1]:
+ if isinstance(data, dict):
+ del data[key_indexes[-1][1]]
+ return True
+
+ @staticmethod
+ def add_entry(data, key, item=None, sep='.'):
+ ''' Get an item from a dictionary with key notation a.b.c
+ d = {'a': {'b': 'c'}}}
+ key = a#b
+ return c
+ '''
+ if key == '':
+ pass
+ elif (not (key and Yedit.valid_key(key, sep)) and
+ isinstance(data, (list, dict))):
+ return None
+
+ key_indexes = Yedit.parse_key(key, sep)
+ for arr_ind, dict_key in key_indexes[:-1]:
+ if dict_key:
+ if isinstance(data, dict) and dict_key in data and data[dict_key]: # noqa: E501
+ data = data[dict_key]
+ continue
+
+ elif data and not isinstance(data, dict):
+ return None
+
+ data[dict_key] = {}
+ data = data[dict_key]
+
+ elif (arr_ind and isinstance(data, list) and
+ int(arr_ind) <= len(data) - 1):
+ data = data[int(arr_ind)]
+ else:
+ return None
+
+ if key == '':
+ data = item
+
+ # process last index for add
+ # expected list entry
+ elif key_indexes[-1][0] and isinstance(data, list) and int(key_indexes[-1][0]) <= len(data) - 1: # noqa: E501
+ data[int(key_indexes[-1][0])] = item
+
+ # expected dict entry
+ elif key_indexes[-1][1] and isinstance(data, dict):
+ data[key_indexes[-1][1]] = item
+
+ return data
+
+ @staticmethod
+ def get_entry(data, key, sep='.'):
+ ''' Get an item from a dictionary with key notation a.b.c
+ d = {'a': {'b': 'c'}}}
+ key = a.b
+ return c
+ '''
+ if key == '':
+ pass
+ elif (not (key and Yedit.valid_key(key, sep)) and
+ isinstance(data, (list, dict))):
+ return None
+
+ key_indexes = Yedit.parse_key(key, sep)
+ for arr_ind, dict_key in key_indexes:
+ if dict_key and isinstance(data, dict):
+ data = data.get(dict_key, None)
+ elif (arr_ind and isinstance(data, list) and
+ int(arr_ind) <= len(data) - 1):
+ data = data[int(arr_ind)]
+ else:
+ return None
+
+ return data
+
+ def write(self):
+ ''' write to file '''
+ if not self.filename:
+ raise YeditException('Please specify a filename.')
+
+ if self.backup and self.file_exists():
+ shutil.copy(self.filename, self.filename + '.orig')
+
+ tmp_filename = self.filename + '.yedit'
+ with open(tmp_filename, 'w') as yfd:
+ # pylint: disable=no-member
+ if hasattr(self.yaml_dict, 'fa'):
+ self.yaml_dict.fa.set_block_style()
+
+ yfd.write(yaml.dump(self.yaml_dict, Dumper=yaml.RoundTripDumper))
+
+ os.rename(tmp_filename, self.filename)
+
+ return (True, self.yaml_dict)
+
+ def read(self):
+ ''' read from file '''
+ # check if it exists
+ if self.filename is None or not self.file_exists():
+ return None
+
+ contents = None
+ with open(self.filename) as yfd:
+ contents = yfd.read()
+
+ return contents
+
+ def file_exists(self):
+ ''' return whether file exists '''
+ if os.path.exists(self.filename):
+ return True
+
+ return False
+
+ def load(self, content_type='yaml'):
+ ''' return yaml file '''
+ contents = self.read()
+
+ if not contents and not self.content:
+ return None
+
+ if self.content:
+ if isinstance(self.content, dict):
+ self.yaml_dict = self.content
+ return self.yaml_dict
+ elif isinstance(self.content, str):
+ contents = self.content
+
+ # check if it is yaml
+ try:
+ if content_type == 'yaml' and contents:
+ self.yaml_dict = yaml.load(contents, yaml.RoundTripLoader)
+ # pylint: disable=no-member
+ if hasattr(self.yaml_dict, 'fa'):
+ self.yaml_dict.fa.set_block_style()
+ elif content_type == 'json' and contents:
+ self.yaml_dict = json.loads(contents)
+ except yaml.YAMLError as err:
+ # Error loading yaml or json
+ raise YeditException('Problem with loading yaml file. %s' % err)
+
+ return self.yaml_dict
+
+ def get(self, key):
+ ''' get a specified key'''
+ try:
+ entry = Yedit.get_entry(self.yaml_dict, key, self.separator)
+ except KeyError:
+ entry = None
+
+ return entry
+
+ def pop(self, path, key_or_item):
+ ''' remove a key, value pair from a dict or an item for a list'''
+ try:
+ entry = Yedit.get_entry(self.yaml_dict, path, self.separator)
+ except KeyError:
+ entry = None
+
+ if entry is None:
+ return (False, self.yaml_dict)
+
+ if isinstance(entry, dict):
+ # pylint: disable=no-member,maybe-no-member
+ if key_or_item in entry:
+ entry.pop(key_or_item)
+ return (True, self.yaml_dict)
+ return (False, self.yaml_dict)
+
+ elif isinstance(entry, list):
+ # pylint: disable=no-member,maybe-no-member
+ ind = None
+ try:
+ ind = entry.index(key_or_item)
+ except ValueError:
+ return (False, self.yaml_dict)
+
+ entry.pop(ind)
+ return (True, self.yaml_dict)
+
+ return (False, self.yaml_dict)
+
+ def delete(self, path):
+ ''' remove path from a dict'''
+ try:
+ entry = Yedit.get_entry(self.yaml_dict, path, self.separator)
+ except KeyError:
+ entry = None
+
+ if entry is None:
+ return (False, self.yaml_dict)
+
+ result = Yedit.remove_entry(self.yaml_dict, path, self.separator)
+ if not result:
+ return (False, self.yaml_dict)
+
+ return (True, self.yaml_dict)
+
+ def exists(self, path, value):
+ ''' check if value exists at path'''
+ try:
+ entry = Yedit.get_entry(self.yaml_dict, path, self.separator)
+ except KeyError:
+ entry = None
+
+ if isinstance(entry, list):
+ if value in entry:
+ return True
+ return False
+
+ elif isinstance(entry, dict):
+ if isinstance(value, dict):
+ rval = False
+ for key, val in value.items():
+ if entry[key] != val:
+ rval = False
+ break
+ else:
+ rval = True
+ return rval
+
+ return value in entry
+
+ return entry == value
+
+ def append(self, path, value):
+ '''append value to a list'''
+ try:
+ entry = Yedit.get_entry(self.yaml_dict, path, self.separator)
+ except KeyError:
+ entry = None
+
+ if entry is None:
+ self.put(path, [])
+ entry = Yedit.get_entry(self.yaml_dict, path, self.separator)
+ if not isinstance(entry, list):
+ return (False, self.yaml_dict)
+
+ # pylint: disable=no-member,maybe-no-member
+ entry.append(value)
+ return (True, self.yaml_dict)
+
+ # pylint: disable=too-many-arguments
+ def update(self, path, value, index=None, curr_value=None):
+ ''' put path, value into a dict '''
+ try:
+ entry = Yedit.get_entry(self.yaml_dict, path, self.separator)
+ except KeyError:
+ entry = None
+
+ if isinstance(entry, dict):
+ # pylint: disable=no-member,maybe-no-member
+ if not isinstance(value, dict):
+ raise YeditException('Cannot replace key, value entry in ' +
+ 'dict with non-dict type. value=[%s] [%s]' % (value, type(value))) # noqa: E501
+
+ entry.update(value)
+ return (True, self.yaml_dict)
+
+ elif isinstance(entry, list):
+ # pylint: disable=no-member,maybe-no-member
+ ind = None
+ if curr_value:
+ try:
+ ind = entry.index(curr_value)
+ except ValueError:
+ return (False, self.yaml_dict)
+
+ elif index is not None:
+ ind = index
+
+ if ind is not None and entry[ind] != value:
+ entry[ind] = value
+ return (True, self.yaml_dict)
+
+ # see if it exists in the list
+ try:
+ ind = entry.index(value)
+ except ValueError:
+ # doesn't exist, append it
+ entry.append(value)
+ return (True, self.yaml_dict)
+
+ # already exists, return
+ if ind is not None:
+ return (False, self.yaml_dict)
+ return (False, self.yaml_dict)
+
+ def put(self, path, value):
+ ''' put path, value into a dict '''
+ try:
+ entry = Yedit.get_entry(self.yaml_dict, path, self.separator)
+ except KeyError:
+ entry = None
+
+ if entry == value:
+ return (False, self.yaml_dict)
+
+ # deepcopy didn't work
+ tmp_copy = yaml.load(yaml.round_trip_dump(self.yaml_dict,
+ default_flow_style=False),
+ yaml.RoundTripLoader)
+ # pylint: disable=no-member
+ if hasattr(self.yaml_dict, 'fa'):
+ tmp_copy.fa.set_block_style()
+ result = Yedit.add_entry(tmp_copy, path, value, self.separator)
+ if not result:
+ return (False, self.yaml_dict)
+
+ self.yaml_dict = tmp_copy
+
+ return (True, self.yaml_dict)
+
+ def create(self, path, value):
+ ''' create a yaml file '''
+ if not self.file_exists():
+ # deepcopy didn't work
+ tmp_copy = yaml.load(yaml.round_trip_dump(self.yaml_dict, default_flow_style=False), # noqa: E501
+ yaml.RoundTripLoader)
+ # pylint: disable=no-member
+ if hasattr(self.yaml_dict, 'fa'):
+ tmp_copy.fa.set_block_style()
+ result = Yedit.add_entry(tmp_copy, path, value, self.separator)
+ if result:
+ self.yaml_dict = tmp_copy
+ return (True, self.yaml_dict)
+
+ return (False, self.yaml_dict)
+
+ # pylint: disable=too-many-return-statements,too-many-branches
+ @staticmethod
+ def run_ansible(module):
+ '''perform the idempotent crud operations'''
+ yamlfile = Yedit(filename=module.params['src'],
+ backup=module.params['backup'],
+ separator=module.params['separator'])
+
+ if module.params['src']:
+ rval = yamlfile.load()
+
+ if yamlfile.yaml_dict is None and \
+ module.params['state'] != 'present':
+ return {'failed': True,
+ 'msg': 'Error opening file [%s]. Verify that the ' +
+ 'file exists, that it is has correct' +
+ ' permissions, and is valid yaml.'}
+
+ if module.params['state'] == 'list':
+ if module.params['content']:
+ content = parse_value(module.params['content'],
+ module.params['content_type'])
+ yamlfile.yaml_dict = content
+
+ if module.params['key']:
+ rval = yamlfile.get(module.params['key']) or {}
+
+ return {'changed': False, 'result': rval, 'state': "list"}
+
+ elif module.params['state'] == 'absent':
+ if module.params['content']:
+ content = parse_value(module.params['content'],
+ module.params['content_type'])
+ yamlfile.yaml_dict = content
+
+ if module.params['update']:
+ rval = yamlfile.pop(module.params['key'],
+ module.params['value'])
+ else:
+ rval = yamlfile.delete(module.params['key'])
+
+ if rval[0] and module.params['src']:
+ yamlfile.write()
+
+ return {'changed': rval[0], 'result': rval[1], 'state': "absent"}
+
+ elif module.params['state'] == 'present':
+ # check if content is different than what is in the file
+ if module.params['content']:
+ content = parse_value(module.params['content'],
+ module.params['content_type'])
+
+ # We had no edits to make and the contents are the same
+ if yamlfile.yaml_dict == content and \
+ module.params['value'] is None:
+ return {'changed': False,
+ 'result': yamlfile.yaml_dict,
+ 'state': "present"}
+
+ yamlfile.yaml_dict = content
+
+ # we were passed a value; parse it
+ if module.params['value']:
+ value = parse_value(module.params['value'],
+ module.params['value_type'])
+ key = module.params['key']
+ if module.params['update']:
+ # pylint: disable=line-too-long
+ curr_value = get_curr_value(parse_value(module.params['curr_value']), module.params['curr_value_format']) # noqa: #501
+
+ rval = yamlfile.update(key, value, module.params['index'], curr_value) # noqa: E501
+
+ elif module.params['append']:
+ rval = yamlfile.append(key, value)
+ else:
+ rval = yamlfile.put(key, value)
+
+ if rval[0] and module.params['src']:
+ yamlfile.write()
+
+ return {'changed': rval[0],
+ 'result': rval[1], 'state': "present"}
+
+ # no edits to make
+ if module.params['src']:
+ # pylint: disable=redefined-variable-type
+ rval = yamlfile.write()
+ return {'changed': rval[0],
+ 'result': rval[1],
+ 'state': "present"}
+
+ return {'failed': True, 'msg': 'Unkown state passed'}
+
+
+def get_curr_value(invalue, val_type):
+ '''return the current value'''
+ if invalue is None:
+ return None
+
+ curr_value = invalue
+ if val_type == 'yaml':
+ curr_value = yaml.load(invalue)
+ elif val_type == 'json':
+ curr_value = json.loads(invalue)
+
+ return curr_value
+
+
+def parse_value(inc_value, vtype=''):
+ '''determine value type passed'''
+ true_bools = ['y', 'Y', 'yes', 'Yes', 'YES', 'true', 'True', 'TRUE',
+ 'on', 'On', 'ON', ]
+ false_bools = ['n', 'N', 'no', 'No', 'NO', 'false', 'False', 'FALSE',
+ 'off', 'Off', 'OFF']
+
+ # It came in as a string but you didn't specify value_type as string
+ # we will convert to bool if it matches any of the above cases
+ if isinstance(inc_value, str) and 'bool' in vtype:
+ if inc_value not in true_bools and inc_value not in false_bools:
+ raise YeditException('Not a boolean type. str=[%s] vtype=[%s]'
+ % (inc_value, vtype))
+ elif isinstance(inc_value, bool) and 'str' in vtype:
+ inc_value = str(inc_value)
+
+ # If vtype is not str then go ahead and attempt to yaml load it.
+ if isinstance(inc_value, str) and 'str' not in vtype:
+ try:
+ inc_value = yaml.load(inc_value)
+ except Exception:
+ raise YeditException('Could not determine type of incoming ' +
+ 'value. value=[%s] vtype=[%s]'
+ % (type(inc_value), vtype))
+
+ return inc_value
+
+
+# pylint: disable=too-many-branches
+def main():
+ ''' ansible oc module for secrets '''
+
+ module = AnsibleModule(
+ argument_spec=dict(
+ state=dict(default='present', type='str',
+ choices=['present', 'absent', 'list']),
+ debug=dict(default=False, type='bool'),
+ src=dict(default=None, type='str'),
+ content=dict(default=None),
+ content_type=dict(default='dict', choices=['dict']),
+ key=dict(default='', type='str'),
+ value=dict(),
+ value_type=dict(default='', type='str'),
+ update=dict(default=False, type='bool'),
+ append=dict(default=False, type='bool'),
+ index=dict(default=None, type='int'),
+ curr_value=dict(default=None, type='str'),
+ curr_value_format=dict(default='yaml',
+ choices=['yaml', 'json', 'str'],
+ type='str'),
+ backup=dict(default=True, type='bool'),
+ separator=dict(default='.', type='str'),
+ ),
+ mutually_exclusive=[["curr_value", "index"], ['update', "append"]],
+ required_one_of=[["content", "src"]],
+ )
+
+ rval = Yedit.run_ansible(module)
+ if 'failed' in rval and rval['failed']:
+ module.fail_json(msg=rval['msg'])
+
+ module.exit_json(**rval)
+
+
+if __name__ == '__main__':
+ main()
--
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