ansible filter_plugins插件实现jinja2自定义filter过滤器
#xiaorui.ccimport base64
import json
import os.path
import yaml
import types
import pipes
import glob
import re
import operator as py_operator
from ansible import errors
from ansible.utils import md5s
from distutils.version import LooseVersion, StrictVersion
from random import SystemRandom
from jinja2.filters import environmentfilter
def to_nice_yaml(*a, **kw):
'''Make verbose, human readable yaml'''
return yaml.safe_dump(*a, indent=4, allow_unicode=True, default_flow_style=False, **kw)
def to_json(a, *args, **kw):
''' Convert the value to JSON '''
return json.dumps(a, *args, **kw)
def to_nice_json(a, *args, **kw):
'''Make verbose, human readable JSON'''
return json.dumps(a, indent=4, sort_keys=True, *args, **kw)
def failed(*a, **kw):
''' Test if task result yields failed '''
item = a
if type(item) != dict:
raise errors.AnsibleFilterError("|failed expects a dictionary")
rc = item.get('rc',0)
failed = item.get('failed',False)
if rc != 0 or failed:
return True
else:
return False
def success(*a, **kw):
''' Test if task result yields success '''
return not failed(*a, **kw)
def changed(*a, **kw):
''' Test if task result yields changed '''
item = a
if type(item) != dict:
raise errors.AnsibleFilterError("|changed expects a dictionary")
if not 'changed' in item:
changed = False
if ('results' in item # some modules return a 'results' key
and type(item['results']) == list
and type(item['results']) == dict):
for result in item['results']:
changed = changed or result.get('changed', False)
else:
changed = item.get('changed', False)
return changed
def skipped(*a, **kw):
''' Test if task result yields skipped '''
item = a
if type(item) != dict:
raise errors.AnsibleFilterError("|skipped expects a dictionary")
skipped = item.get('skipped', False)
return skipped
def mandatory(a):
''' Make a variable mandatory '''
try:
a
except NameError:
raise errors.AnsibleFilterError('Mandatory variable not defined.')
else:
return a
def bool(a):
''' return a bool for the arg '''
if a is None or type(a) == bool:
return a
if type(a) in types.StringTypes:
a = a.lower()
if a in ['yes', 'on', '1', 'true', 1]:
return True
else:
return False
def quote(a):
''' return its argument quoted for shell usage '''
return pipes.quote(a)
def fileglob(pathname):
''' return list of matched files for glob '''
return glob.glob(pathname)
def regex(value='', pattern='', ignorecase=False, match_type='search'):
''' Expose `re` as a boolean filter using the `search` method by default.
This is likely only useful for `search` and `match` which already
have their own filters.
'''
if ignorecase:
flags = re.I
else:
flags = 0
_re = re.compile(pattern, flags=flags)
_bool = __builtins__.get('bool')
return _bool(getattr(_re, match_type, 'search')(value))
def match(value, pattern='', ignorecase=False):
''' Perform a `re.match` returning a boolean '''
return regex(value, pattern, ignorecase, 'match')
def search(value, pattern='', ignorecase=False):
''' Perform a `re.search` returning a boolean '''
return regex(value, pattern, ignorecase, 'search')
def regex_replace(value='', pattern='', replacement='', ignorecase=False):
''' Perform a `re.sub` returning a string '''
if not isinstance(value, basestring):
value = str(value)
if ignorecase:
flags = re.I
else:
flags = 0
_re = re.compile(pattern, flags=flags)
return _re.sub(replacement, value)
def unique(a):
return set(a)
def intersect(a, b):
return set(a).intersection(b)
def difference(a, b):
return set(a).difference(b)
def symmetric_difference(a, b):
return set(a).symmetric_difference(b)
def union(a, b):
return set(a).union(b)
def version_compare(value, version, operator='eq', strict=False):
''' Perform a version comparison on a value '''
op_map = {
'==': 'eq', '=':'eq', 'eq': 'eq',
'<':'lt', 'lt': 'lt',
'<=': 'le', 'le': 'le',
'>':'gt', 'gt': 'gt',
'>=': 'ge', 'ge': 'ge',
'!=': 'ne', '<>': 'ne', 'ne': 'ne'
}
if strict:
Version = StrictVersion
else:
Version = LooseVersion
if operator in op_map:
operator = op_map
else:
raise errors.AnsibleFilterError('Invalid operator type')
try:
method = getattr(py_operator, operator)
return method(Version(str(value)), Version(str(version)))
except Exception, e:
raise errors.AnsibleFilterError('Version comparison: %s' % e)
@environmentfilter
def rand(environment, end, start=None, step=None):
r = SystemRandom()
if isinstance(end, (int, long)):
if not start:
start = 0
if not step:
step = 1
return r.randrange(start, end, step)
elif hasattr(end, '__iter__'):
if start or step:
raise errors.AnsibleFilterError('start and step can only be used with integer values')
return r.choice(end)
else:
raise errors.AnsibleFilterError('random can only be used on sequences and integers')
class FilterModule(object):
''' Ansible core jinja2 filters '''
def filters(self):
return {
# base 64
'b64decode': base64.b64decode,
'b64encode': base64.b64encode,
# json
'to_json': to_json,
'to_nice_json': to_nice_json,
'from_json': json.loads,
# yaml
'to_yaml': yaml.safe_dump,
'to_nice_yaml': to_nice_yaml,
'from_yaml': yaml.safe_load,
# path
'basename': os.path.basename,
'dirname': os.path.dirname,
'expanduser': os.path.expanduser,
'realpath': os.path.realpath,
'relpath': os.path.relpath,
# failure testing
'failed': failed,
'success' : success,
# changed testing
'changed' : changed,
# skip testing
'skipped' : skipped,
# variable existence
'mandatory': mandatory,
# value as boolean
'bool': bool,
# quote string for shell usage
'quote': quote,
# md5 hex digest of string
'md5': md5s,
# file glob
'fileglob': fileglob,
# regex
'match': match,
'search': search,
'regex': regex,
'regex_replace': regex_replace,
# list
'unique' : unique,
'intersect': intersect,
'difference': difference,
'symmetric_difference': symmetric_difference,
'union': union,
# version comparison
'version_compare': version_compare,
# random numbers
'random': rand,
}
页:
[1]