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import logging
import os
import subprocess
import fetch_from
class UnsupportedProtocolException(Exception):
pass
def executable_path():
return "/usr/local/bin/sky"
def is_avaliable():
if not os.path.exists(executable_path()):
return False
try:
subprocess.check_output([executable_path(), "--version"])
return True
except subprocess.CalledProcessError:
return False
except OSError:
return False
def fetch(skynet_id, file_name, timeout=None):
if not is_avaliable():
raise UnsupportedProtocolException("Skynet is not available")
target_dir = os.path.abspath(fetch_from.uniq_string_generator())
os.mkdir(target_dir)
cmd_args = [executable_path(), "get", "-N", "Backbone", "--user", "--wait", "--dir", target_dir, skynet_id]
if timeout is not None:
cmd_args += ["--timeout", str(timeout)]
logging.info("Call skynet with args: %s", cmd_args)
stdout = subprocess.check_output(cmd_args).strip()
logging.debug("Skynet call with args %s is finished, result is %s", cmd_args, stdout)
return os.path.join(target_dir, file_name)
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