Refactor a large part of the networking code.

Splits off distro specific code into specific files so that
other kinds of networking configuration can be written by the
various distro(s) that cloud-init supports.

It also isolates some of the cloudinit.net code so that it can
be more easily used on its own (and incorporated into other
projects such as curtin).

During this process it adds tests so that the net process can
be tested (to some level) so that the format conversion processes
can be tested going forward.

1 files changed, 50 insertions, 0 deletions

diff --git a/cloudinit/serial.py b/cloudinit/serial.py
new file mode 100644
index 00000000..af45c13e
--- /dev/null
+++ b/cloudinit/serial.py
@@ -0,0 +1,50 @@
+# vi: ts=4 expandtab
+#
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU General Public License version 3, as
+#    published by the Free Software Foundation.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU General Public License for more details.
+#
+#    You should have received a copy of the GNU General Public License
+#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+from __future__ import absolute_import
+
+try:
+    from serial import Serial
+except ImportError:
+    # For older versions of python (ie 2.6) pyserial may not exist and/or
+    # work and/or be installed, so make a dummy/fake serial that blows up
+    # when used...
+    class Serial(object):
+        def __init__(self, *args, **kwargs):
+            pass
+
+        @staticmethod
+        def isOpen():
+            return False
+
+        @staticmethod
+        def write(data):
+            raise IOError("Unable to perform serial `write` operation,"
+                          " pyserial not installed.")
+
+        @staticmethod
+        def readline():
+            raise IOError("Unable to perform serial `readline` operation,"
+                          " pyserial not installed.")
+
+        @staticmethod
+        def flush():
+            raise IOError("Unable to perform serial `flush` operation,"
+                          " pyserial not installed.")
+
+        @staticmethod
+        def read(size=1):
+            raise IOError("Unable to perform serial `read` operation,"
+                          " pyserial not installed.")