def use(self, name):
envPath = os.path.normpath(os.path.join(self.envsPath, name))
if not os.path.isdir(envPath):
return Fail(InvalidOptionError("Environment '%s' does not exist."))
envSpec = SubenvSpec.fromEnvPath(envPath)
current = os.path.join(self.basePath, "current")
return Try.attempt(makeSymlink, envSpec.envPath, current, True) \
.then(dinfo("Current substance environment now: '%s'" % envSpec.name))
def ls(self):
envs = []
current = self._getCurrentEnv()
for f in os.listdir(self.envsPath):
path = os.path.join(self.envsPath, f)
if os.path.isdir(path):
env = SubenvSpec.fromEnvPath(path)
if current and env.envPath == current.envPath:
env.current = True
envs.append(env)
return OK(envs)
def _getCurrentEnv(self):
try:
current = readSymlink(os.path.join(self.basePath, "current"))
return SubenvSpec.fromEnvPath(current)
except Exception as err:
return None
def init(self, path, env={}):
logger.info("Initializing subenv from: %s" % path)
return SubenvSpec.fromSpecPath(path, env) \
.bind(self._applyEnv)
def _loadEnvSpec(self, name):
envPath = os.path.normpath(os.path.join(self.envsPath, name))
if not os.path.isdir(envPath):
return Fail(
InvalidOptionError("Environment '%s' does not exist." % name))
return OK(SubenvSpec.fromEnvPath(envPath))