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import logging
import os
import urllib2
import shutil
from .vcs import Git, Bzr
from .utils import (
_check_call,
_get_juju_home,
extract_zip,
get_qualified_charm_url,
path_join,
path_exists,
STORE_URL,
temp_file,
yaml_load)
class Charm(object):
log = logging.getLogger('deployer.charm')
def __init__(self, name, path, branch, rev, build, charm_url=""):
self.name = name
self._path = path
self.branch = branch
self.rev = rev
self._charm_url = charm_url
self._build = build
self.vcs = self.get_vcs()
def get_vcs(self):
if not self.branch:
return None
if self.branch.startswith('git') or 'github.com' in self.branch or \
os.path.exists(os.path.join(self.branch, '.git')):
return Git(self.path, self.branch, self.log)
elif self.branch.startswith("bzr") or self.branch.startswith('lp:') \
or os.path.exists(os.path.join(self.branch, '.bzr')) \
or self.branch.startswith('file:'):
return Bzr(self.path, self.branch, self.log)
raise ValueError(
"Could not determine vcs backend for %s" % self.branch)
@classmethod
def from_service(cls, name, repo_path, deploy_series, data):
"""
name: service name
data['charm']: charm name or store charm url
data['charm_url'] store charm url
"""
branch, rev, series = None, None, None
charm_branch = data.get('branch')
if charm_branch is not None:
branch, sep, rev = charm_branch.partition('@')
charm_path, store_url, build = None, None, None
name = data.get('charm', name)
if name.startswith('cs:'):
store_url = name
elif name.startswith('local:'):
# Support vcs charms specifying their
parts = name[len('local:'):].split('/')
if len(parts) == 2:
series, name = parts
elif data.get('series'):
series = data['series']
name = parts.pop()
else:
series = deploy_series
charm_path = path_join(repo_path, series, name)
elif 'series' in data:
series = data['series']
charm_path = path_join(repo_path, series, name)
else:
charm_path = path_join(repo_path, deploy_series, name)
if not store_url:
store_url = data.get('charm_url', None)
if store_url and branch:
cls.log.error(
"Service: %s has both charm url: %s and branch: %s specified",
name, store_url, branch)
if not store_url and not branch:
cls.log.error(
"Service: %s has neither charm url or branch specified",
name)
elif not store_url:
build = data.get('build', '')
return cls(name, charm_path, branch, rev, build, store_url)
def is_local(self):
if self._charm_url:
if self._charm_url.startswith('cs:'):
return False
return True
def exists(self):
return self.is_local() and path_exists(self.path)
def is_subordinate(self):
return self.metadata.get('subordinate', False)
@property
def charm_url(self):
if self._charm_url:
return self._charm_url
series = os.path.basename(os.path.dirname(self.path))
charm_name = self.metadata['name']
return "local:%s/%s" % (series, charm_name)
def build(self):
if not self._build:
return
self.log.debug("Building charm %s with %s", self.path, self._build)
_check_call([self._build], self.log,
"Charm build failed %s @ %s", self._build, self.path,
cwd=self.path)
def fetch(self):
if self._charm_url:
self._fetch_store_charm()
return
elif not self.branch:
self.log.warning("Invalid charm specification %s", self.name)
return
self.log.debug(" Branching charm %s @ %s", self.branch, self.path)
self.vcs.branch()
if self.rev:
self.vcs.update(self.rev)
self.build()
@property
def path(self):
if not self.is_local() and not self._path:
self._path = self._get_charm_store_cache()
return self._path
@property
def series_path(self):
if not self.is_local():
return None
return os.path.dirname(self.path)
def _fetch_store_charm(self, update=False):
cache_dir = self._get_charm_store_cache()
self.log.debug("Cache dir %s", cache_dir)
if os.path.exists(cache_dir) and not update:
return
qualified_url = get_qualified_charm_url(self.charm_url)
self.log.debug("Retrieving store charm %s" % qualified_url)
if update and os.path.exists(cache_dir):
shutil.rmtree(cache_dir)
store_url = "%s/charm/%s" % (STORE_URL, qualified_url[3:])
with temp_file() as fh:
ufh = urllib2.urlopen(store_url)
shutil.copyfileobj(ufh, fh)
fh.flush()
extract_zip(fh.name, self.path)
self.config
def _get_charm_store_cache(self):
assert not self.is_local(), "Attempt to get store charm for local"
# Cache
jhome = _get_juju_home()
cache_dir = os.path.join(jhome, ".deployer-store-cache")
if not os.path.exists(cache_dir):
os.mkdir(cache_dir)
return os.path.join(
cache_dir,
self.charm_url.replace(':', '_').replace("/", "_"))
def update(self, build=False):
if not self.branch:
return
assert self.exists()
self.log.debug(" Updating charm %s from %s", self.path, self.branch)
self.vcs.update(self.rev)
if build:
self.build()
def is_modified(self):
if not self.branch:
return False
return self.vcs.is_modified()
@property
def config(self):
config_path = path_join(self.path, "config.yaml")
if not path_exists(config_path):
return {}
with open(config_path) as fh:
return yaml_load(fh.read()).get('options', {})
@property
def metadata(self):
md_path = path_join(self.path, "metadata.yaml")
if not path_exists(md_path):
if not path_exists(self.path):
raise RuntimeError("No charm metadata @ %s", md_path)
with open(md_path) as fh:
return yaml_load(fh.read())
def get_provides(self):
p = {'juju-info': [{'name': 'juju-info'}]}
for key, value in self.metadata['provides'].items():
value['name'] = key
p.setdefault(value['interface'], []).append(value)
return p
def get_requires(self):
r = {}
for key, value in self.metadata['requires'].items():
value['name'] = key
r.setdefault(value['interface'], []).append(value)
return r
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