resync helpers

hooks/charmhelpers/contrib/network/ip.py

@@ -30,12 +30,12 @@ def get_address_in_network(network, fallback=None, fatal=False):
     """
     Get an IPv4 address within the network from the host.
 
-    Args:
-        network (str): CIDR presentation format. For example,
-                       '192.168.1.0/24'.
-        fallback (str): If no address is found, return fallback.
-        fatal (boolean): If no address is found, fallback is not
-                         set and fatal is True then exit(1).
+    :param network (str): CIDR presentation format. For example,
+        '192.168.1.0/24'.
+    :param fallback (str): If no address is found, return fallback.
+    :param fatal (boolean): If no address is found, fallback is not
+        set and fatal is True then exit(1).
+
     """
 
     def not_found_error_out():

hooks/charmhelpers/contrib/storage/linux/utils.py

@@ -37,6 +37,7 @@ def zap_disk(block_device):
     check_call(['dd', 'if=/dev/zero', 'of=%s' % (block_device),
                 'bs=512', 'count=100', 'seek=%s' % (gpt_end)])
 
+
 def is_device_mounted(device):
     '''Given a device path, return True if that device is mounted, and False
     if it isn't.

hooks/charmhelpers/core/fstab.py

@@ -48,9 +48,11 @@ class Fstab(file):
         file.__init__(self, self._path, 'r+')
 
     def _hydrate_entry(self, line):
+        # NOTE: use split with no arguments to split on any
+        #       whitespace including tabs
         return Fstab.Entry(*filter(
             lambda x: x not in ('', None),
-            line.strip("\n").split(" ")))
+            line.strip("\n").split()))
 
     @property
     def entries(self):

hooks/charmhelpers/core/hookenv.py

@@ -25,7 +25,7 @@ cache = {}
 def cached(func):
     """Cache return values for multiple executions of func + args
 
-    For example:
+    For example::
 
         @cached
         def unit_get(attribute):
@@ -445,18 +445,19 @@ class UnregisteredHookError(Exception):
 class Hooks(object):
     """A convenient handler for hook functions.
 
-    Example:
+    Example::
+
         hooks = Hooks()
 
         # register a hook, taking its name from the function name
         @hooks.hook()
         def install():
-            ...
+            pass  # your code here
 
         # register a hook, providing a custom hook name
         @hooks.hook("config-changed")
         def config_changed():
-            ...
+            pass  # your code here
 
         if __name__ == "__main__":
             # execute a hook based on the name the program is called by

hooks/charmhelpers/core/host.py

@@ -12,7 +12,6 @@ import random
 import string
 import subprocess
 import hashlib
-import apt_pkg
 
 from collections import OrderedDict
 
@@ -212,13 +211,13 @@ def file_hash(path):
 def restart_on_change(restart_map, stopstart=False):
     """Restart services based on configuration files changing
 
-    This function is used a decorator, for example
+    This function is used a decorator, for example::
 
         @restart_on_change({
             '/etc/ceph/ceph.conf': [ 'cinder-api', 'cinder-volume' ]
             })
         def ceph_client_changed():
-            ...
+            pass  # your code here
 
     In this example, the cinder-api and cinder-volume services
     would be restarted if /etc/ceph/ceph.conf is changed by the
@@ -314,10 +313,13 @@ def get_nic_hwaddr(nic):
 
 def cmp_pkgrevno(package, revno, pkgcache=None):
     '''Compare supplied revno with the revno of the installed package
-       1 => Installed revno is greater than supplied arg
-       0 => Installed revno is the same as supplied arg
-      -1 => Installed revno is less than supplied arg
+
+    *  1 => Installed revno is greater than supplied arg
+    *  0 => Installed revno is the same as supplied arg
+    * -1 => Installed revno is less than supplied arg
+
     '''
+    import apt_pkg
     if not pkgcache:
         apt_pkg.init()
         pkgcache = apt_pkg.Cache()

hooks/charmhelpers/fetch/__init__.py

@@ -13,7 +13,6 @@ from charmhelpers.core.hookenv import (
     config,
     log,
 )
-import apt_pkg
 import os
 
 
@@ -117,6 +116,7 @@ class BaseFetchHandler(object):
 
 def filter_installed_packages(packages):
     """Returns a list of packages that require installation"""
+    import apt_pkg
     apt_pkg.init()
 
     # Tell apt to build an in-memory cache to prevent race conditions (if
@@ -235,31 +235,39 @@ def configure_sources(update=False,
                       sources_var='install_sources',
                       keys_var='install_keys'):
     """
-    Configure multiple sources from charm configuration
+    Configure multiple sources from charm configuration.
+
+    The lists are encoded as yaml fragments in the configuration.
+    The frament needs to be included as a string.
 
     Example config:
-        install_sources:
+        install_sources: |
           - "ppa:foo"
           - "http://example.com/repo precise main"
-        install_keys:
+        install_keys: |
           - null
           - "a1b2c3d4"
 
     Note that 'null' (a.k.a. None) should not be quoted.
     """
-    sources = safe_load(config(sources_var))
-    keys = config(keys_var)
-    if keys is not None:
-        keys = safe_load(keys)
-    if isinstance(sources, basestring) and (
-            keys is None or isinstance(keys, basestring)):
-        add_source(sources, keys)
+    sources = safe_load((config(sources_var) or '').strip()) or []
+    keys = safe_load((config(keys_var) or '').strip()) or None
+
+    if isinstance(sources, basestring):
+        sources = [sources]
+
+    if keys is None:
+        for source in sources:
+            add_source(source, None)
     else:
-        if not len(sources) == len(keys):
-            msg = 'Install sources and keys lists are different lengths'
-            raise SourceConfigError(msg)
-        for src_num in range(len(sources)):
-            add_source(sources[src_num], keys[src_num])
+        if isinstance(keys, basestring):
+            keys = [keys]
+
+        if len(sources) != len(keys):
+            raise SourceConfigError(
+                'Install sources and keys lists are different lengths')
+        for source, key in zip(sources, keys):
+            add_source(source, key)
     if update:
         apt_update(fatal=True)