Remove dependencies on morphlib and cliapp from deployment extensionsbaserock/adamcoldrick/remove-dependencies-v3

This is done by either copying some utility functions from morph
into writeexts.py, and using the `subprocess` module rather than
cliapp's runcmd and ssh_runcmd.

Note that this means that these extensions will require
"$definitions_checkout/extensions" in PYTHONPATH when they are
run.

This commit also updates VERSION to 5, since the PYTHONPATH
requirement means that this change is incompatible with old
versions of morph.

Change-Id: Iec6fa7e3c7219619ce55e18493e5c37c36e97816

1 files changed, 6 insertions, 15 deletions

diff --git a/extensions/install-essential-files.configure b/extensions/install-essential-files.configure
index bed394df..3d33fe03 100755
--- a/extensions/install-essential-files.configure
+++ b/extensions/install-essential-files.configure
@@ -22,20 +22,11 @@ to install into the target system.
 
 '''
 
-import subprocess
 import os
+import subprocess
+import sys
 
-import cliapp
-
-class InstallEssentialFilesConfigureExtension(cliapp.Application):
-
-    def process_args(self, args):
-        target_root = args[0]
-        os.environ["INSTALL_FILES"] = "install-files/essential-files/manifest"
-        self.install_essential_files(target_root)
-
-    def install_essential_files(self, target_root):
-        command = os.path.join("extensions/install-files.configure")
-        subprocess.check_call([command, target_root])
-
-InstallEssentialFilesConfigureExtension().run()
+target_root = sys.argv[1]
+os.environ["INSTALL_FILES"] = "install-files/essential-files/manifest"
+command = os.path.join("extensions/install-files.configure")
+subprocess.check_call([command, target_root])