Add virt-builder source

Add implementation for virt-builder source which aims to create
container root file system from VM image build with virt-builder.

Usage examples:
    $ virt-bootstrap virt-builder://fedora-25 /tmp/foo
    $ virt-bootstrap virt-builder://ubuntu-16.04 /tmp/bar --root-password secret
    $ virt-bootstrap virt-builder://fedora-25 /tmp/foo -f qcow2 --idmap 0:1000:10
    $ sudo virt-bootstrap virt-builder://fedora-25 /tmp/foo --idmap 0:1000:10

Tests are also introduced along with the implementation. They cover
creation of root file system and UID/GID mapping for 'dir' and 'qcow2'
output format by mocking the build_image() method to avoid the time
consuming call to virt-builder which might also require network
connection with function which creates dummy disk image.
Setting root password is handled by virt-builder and hence the
introduced test only ensures that the password string is passed
correctly.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/virtBootstrap/virt_bootstrap.py b/src/virtBootstrap/virt_bootstrap.py
index e387842..fe95f5e 100755
--- a/src/virtBootstrap/virt_bootstrap.py
+++ b/src/virtBootstrap/virt_bootstrap.py
@@ -62,7 +62,7 @@ def get_source(source_type):
     Get object which match the source type
     """
     try:
-        class_name = "%sSource" % source_type.capitalize()
+        class_name = "%sSource" % source_type.title().replace('-', '')
         clazz = getattr(sources, class_name)
         return clazz
     except Exception: