Merge lp:~abentley/juju-release-tools/make-parent-dir into lp:juju-release-tools

[Aaron Bentley]

Create parent directories as needed.

Update download_agents to create the parent directories of agents.

This is needed now that agents have version prefixes like agent/1.25.1

[Curtis Hovey (sinzui)]

Thank you.

review: Approve (code)

=== modified file 'download_agents.py'
--- download_agents.py	2015-11-06 21:00:26 +0000
+++ download_agents.py	2016-02-17 21:41:53 +0000
@@ -2,6 +2,7 @@
 from __future__ import print_function
 
 from argparse import ArgumentParser
+import errno
 import json
 import os
 from urllib.request import urlopen
@@ -22,6 +23,11 @@
         else:
             print('Downloading: {}'.format(path), end='')
             sys.stdout.flush()
+            try:
+                os.makedirs(os.path.dirname(download['path']))
+            except OSError as e:
+                if e.errno != errno.EEXIST:
+                    raise
             with open(download['path'], 'wb') as target:
                 with urlopen(download['url']) as source:
                     while True: