add cloud-config hooks for enabling byobu by default.

cloudinit/CloudConfig/cc_byobu.py

@@ -0,0 +1,51 @@
+# vi: ts=4 expandtab
+#
+#    Copyright (C) 2009-2010 Canonical Ltd.
+#
+#    Author: Scott Moser <scott.moser@canonical.com>
+#
+#    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/>.
+import cloudinit.util as util
+import subprocess
+import traceback
+
+def handle(name,cfg,cloud,log,args):
+    if len(args) != 0:
+        value = args[0]
+    else:
+        value = util.get_cfg_option_str(cfg,"byobu_by_default","")
+
+    if not value: return
+
+    if value == "user":
+        user = util.get_cfg_option_str(cfg,"user","ubuntu")
+        cmd = [ 'sudo', '-Hu', user, 'byobu-launcher-install' ]
+    elif value == "system":
+        shcmd="echo '%s' | debconf-set-selections && %s" % \
+            ( "byobu byobu/launch-by-default boolean true", 
+              "dpkg-reconfigure byobu --frontend=noninteractive" )
+        cmd = [ "/bin/sh", "-c", shcmd ]
+    else:
+        log.warn("Unknown value %s for byobu_by_default" % value)
+        return
+
+    log.debug("enabling byobu for %s" % value)
+
+    try:
+        subprocess.check_call(cmd)
+    except subprocess.CalledProcessError as e:
+        log.debug(traceback.format_exc(e))
+        raise Exception("Cmd returned %s: %s" % ( e.returncode, cmd))
+    except OSError as e:
+        log.debug(traceback.format_exc(e))
+        raise Exception("Cmd failed to execute: %s" % ( cmd ))

cloudinit/__init__.py

@@ -46,6 +46,7 @@ cloud_config_modules:
  - updates-check
  - disable-ec2-metadata
  - runcmd
+ - byobu
 
 log_cfg: built_in
 """

doc/examples/cloud-config.txt

@@ -226,3 +226,10 @@ debconf_selections: |     # Need to perserve newlines
         # Override default frontend to readline, but allow user to select.
         debconf debconf/frontend select readline
         debconf debconf/frontend seen false
+
+# manage byobu defaults
+# byobu_by_default: ('user'|'system')
+#   'user' will set byobu 'launch-by-default' for the default user
+#   'system' will enable launch-by-default for for all users
+byobu_by_default: system
+