Toolset to render and manage AWS CloudFormation ( https://pypi.org/project/cloudbender )
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import os
import glob
import logging
from .utils import dict_merge
from .jinja import read_config_file
from .stack import Stack
logger = logging.getLogger(__name__)
class StackGroup(object):
def __init__(self, path, ctx):
self.name = None
self.ctx = ctx
self.path = path
self.rel_path = os.path.relpath(path, ctx['config_path'])
self.config = {}
self.sgs = []
self.stacks = []
if self.rel_path == '.':
self.rel_path = ''
def dump_config(self):
for sg in self.sgs:
sg.dump_config()
logger.debug("<StackGroup {}: {}>".format(self.name, vars(self)))
for s in self.stacks:
s.dump_config()
def read_config(self, parent_config={}):
if not os.path.isdir(self.path):
return None
# First read config.yaml if present
_config = read_config_file(os.path.join(self.path, 'config.yaml'))
# Stack Group name if not explicit via config is derived from subfolder, or in case of root object the parent folder
if "stackgroupname" in _config:
self.name = _config["stackgroupname"]
elif not self.name:
self.name = os.path.split(self.path)[1]
# Merge config with parent config
_config = dict_merge(parent_config, _config)
tags = _config.get('tags', {})
parameters = _config.get('parameters', {})
options = _config.get('options', {})
region = _config.get('region', 'global')
profile = _config.get('profile', '')
stackname_prefix = _config.get('stacknameprefix', '')
logger.debug("StackGroup {} added.".format(self.name))
# Add stacks
stacks = [s for s in glob.glob(os.path.join(self.path, '*.yaml')) if not s.endswith("config.yaml")]
for stack_path in stacks:
stackname = os.path.basename(stack_path).split('.')[0]
template = stackname
if stackname_prefix:
stackname = stackname_prefix + stackname
new_stack = Stack(
name=stackname, template=template, path=stack_path, rel_path=str(self.rel_path),
tags=dict(tags), parameters=dict(parameters), options=dict(options),
region=str(region), profile=str(profile), ctx=self.ctx)
new_stack.read_config()
self.stacks.append(new_stack)
# Create StackGroups recursively
for sub_group in [f.path for f in os.scandir(self.path) if f.is_dir()]:
sg = StackGroup(sub_group, self.ctx)
sg.read_config(_config)
self.sgs.append(sg)
# Return raw, merged config to parent
return _config
def get_stacks(self, name=None, recursive=True, match_by='name'):
""" Returns [stack] matching stack_name or [all] """
stacks = []
if name:
logger.debug("Looking for stack {} in group {}".format(name, self.name))
for s in self.stacks:
if not name or (s.stackname == name and match_by == 'name') or (s.path.endswith(name) and match_by == 'path'):
if self.rel_path:
logger.debug("Found stack {} in group {}".format(s.stackname, self.rel_path))
else:
logger.debug("Found stack {}".format(s.stackname))
stacks.append(s)
if recursive:
for sg in self.sgs:
s = sg.get_stacks(name, recursive, match_by)
if s:
stacks = stacks + s
return stacks
def get_stackgroup(self, name=None, recursive=True, match_by='name'):
""" Returns stack group matching stackgroup_name or all if None """
if not name or (self.name == name and match_by == 'name') or (self.path.endswith(name) and match_by == 'path'):
logger.debug("Found stack_group {}".format(self.name))
return self
if name and name != 'config':
logger.debug("Looking for stack_group {} in group {}".format(name, self.name))
if recursive:
for sg in self.sgs:
s = sg.get_stackgroup(name, recursive, match_by)
if s:
return s
return None