/usr/lib/python2.7/dist-packages/deployer/charm.py is in juju-deployer 0.6.4-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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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 is_git_branch(self):
return self.branch.startswith('git') or \
self.branch.find("review.openstack.org") != -1 or \
"github.com" in self.branch or \
"git.launchpad.net" in self.branch or \
os.path.exists(os.path.join(self.branch, '.git'))
def get_vcs(self):
if not self.branch:
return None
if self.is_git_branch():
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 os.path.isabs(name):
# charm points to an absolute local path
charm_path = name.rstrip(os.path.sep)
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:
build = data.get('build', '')
return cls(name, charm_path, branch, rev, build, store_url)
def is_absolute(self):
"""Charm config points to an absolute path on disk.
"""
return os.path.isabs(self.name)
@property
def repo_path(self):
"""The Juju repository path in which this charm resides.
For most charms this returns None, leaving the repo path to be
determined by the Deployment that deploys the charm.
For charms at an absolute path, however, the repo path is by
definition the directory two levels up from the charm. (And the
series directory is one level up.) This allows us to deploy
charms from anywhere on the filesystem without first gathering them
under one repository path.
"""
if self.is_absolute():
d = os.path.dirname
return d(d(self.path))
return None
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, shell=True)
def fetch(self):
if self._charm_url:
self._fetch_store_charm()
return
elif self.is_absolute():
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 self.is_absolute() or 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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