Skip to content
Branch: master
Find file Copy path
Find file Copy path
Fetching contributors…
Cannot retrieve contributors at this time
96 lines (83 sloc) 3.16 KB
import os
import sys
import tarfile
import json
from hashlib import sha1
from itertools import chain
from .util import to_unicode
# python2
import cStringIO
BytesIO = cStringIO.StringIO
# python3
import io
BytesIO = io.BytesIO
class MetaflowPackage(object):
def __init__(self, flow, environment, logger, suffixes=DEFAULT_SUFFIXES):
self.suffixes = list(set().union(suffixes, DEFAULT_SUFFIXES))
self.environment = environment
self.metaflow_root = os.path.dirname(__file__)
for step in flow:
for deco in step.decorators:
self.blob, self.sha = self._make()
def _walk(self, root, exclude_hidden=True):
root = to_unicode(root) # handle files/folder with non ascii chars
prefixlen = len('%s/' % os.path.dirname(root))
for path, dirs, files in os.walk(root):
if exclude_hidden and '/.' in path:
# path = path[2:] # strip the ./ prefix
# if path and (path[0] == '.' or './' in path):
# continue
for fname in files:
if fname[0] == '.':
if any(fname.endswith(suffix) for suffix in self.suffixes):
p = os.path.join(path, fname)
yield p, p[prefixlen:]
def path_tuples(self):
Returns list of (path, arcname) to be added to the job package, where
`arcname` is the alternative name for the file in the package.
# We want the following contents in the tarball
# Metaflow package itself
for path_tuple in self._walk(self.metaflow_root, exclude_hidden=False):
yield path_tuple
# the package folders for environment
for path_tuple in self.environment.add_to_package():
yield path_tuple
# the user's working directory
flowdir = os.path.dirname(os.path.abspath(sys.argv[0])) + '/'
for path_tuple in self._walk(flowdir):
yield path_tuple
def _add_info(self, tar):
info = tarfile.TarInfo('INFO')
env = self.environment.get_environment_info()
buf = BytesIO()
info.size = len(buf.getvalue())
tar.addfile(info, buf)
def _make(self):
def no_mtime(tarinfo):
# a modification time change should not change the hash of
# the package. Only content modifications will.
tarinfo.mtime = 0
return tarinfo
buf = BytesIO()
with tarfile.TarFile(fileobj=buf, mode='w') as tar:
for path, arcname in self.path_tuples():
tar.add(path, arcname=arcname,
recursive=False, filter=no_mtime)
blob = buf.getvalue()
return blob, sha1(blob).hexdigest()
def __str__(self):
return '<code package %s>' % self.sha
You can’t perform that action at this time.