provide help on 'remctl remote help help' etc

[invirt/packages/invirt-remote.git] / files / usr / sbin / sipb-xen-remote-listvms

diff --git a/files/usr/sbin/sipb-xen-remote-listvms b/files/usr/sbin/sipb-xen-remote-listvms
index 172ca17..106cc47 100755 (executable)
--- a/files/usr/sbin/sipb-xen-remote-listvms
+++ b/files/usr/sbin/sipb-xen-remote-listvms
@@ -1,37 +1,51 @@
-#!/usr/bin/env python2.5
+#!/usr/bin/python
 
 """
 Collates the results of listvms from multiple VM servers.  Part of the xvm
 suite.
 """
 
-from itertools import chain
-from subprocess import CalledProcessError, PIPE, Popen
-from sys import argv, stdout
-from yaml import safe_dump, safe_load
+from subprocess import PIPE, Popen
+try:
+    from subprocess import CalledProcessError
+except ImportError:
+    # Python 2.4 doesn't implement CalledProcessError
+    class CalledProcessError(Exception):
+        """This exception is raised when a process run by check_call() returns
+        a non-zero exit status. The exit status will be stored in the
+        returncode attribute."""
+        def __init__(self, returncode, cmd):
+            self.returncode = returncode
+            self.cmd = cmd
+        def __str__(self):
+            return "Command '%s' returned non-zero exit status %d" % (self.cmd, self.returncode)
+import sys
+import yaml
 
 ###
 
 def main(argv):
-  # Query each of the server for their VMs.
-  # TODO get `servers` from a real list of all the VM hosts (instead of
-  # hardcoding the list here)
-  servers = [ 'black-mesa.mit.edu', 'sx-blade-2.mit.edu' ]
-  # XXX
-  pipes = [ Popen(['remctl', server, 'remote', 'web', 'listvms'], stdout=PIPE)
-            for server in servers ]
-  outputs = [ p.communicate()[0] for p in pipes ]
-  for p in pipes:
-    if p.returncode != 0: raise CalledProcessError(p.returncode, cmd)
-  results = [ safe_load(o) for o in outputs ]
-  results = filter( lambda x: x is not None, results )
+    # Query each of the server for their VMs.
+    # TODO get `servers` from a real list of all the VM hosts (instead of
+    # hardcoding the list here)
+    servers = ['black-mesa.mit.edu', 'sx-blade-2.mit.edu']
+    # XXX
+    pipes = [Popen(['remctl', server, 'remote', 'web', 'listvms'], stdout=PIPE)
+             for server in servers]
+    outputs = [p.communicate()[0] for p in pipes]
+    for p in pipes:
+        if p.returncode != 0:
+            raise CalledProcessError(p.returncode, cmd)
+    results = [yaml.load(o, yaml.CSafeLoader) for o in outputs]
+    results = filter(lambda x: x is not None, results)
 
-  # Merge the results and print.
-  merged = {}
-  for result in results: merged.update(result)
-  print safe_dump(merged, default_flow_style=False)
+    # Merge the results and print.
+    merged = {}
+    for result in results:
+        merged.update(result)
+    print yaml.dump(merged, Dumper=yaml.CSafeDumper, default_flow_style=False)
 
 if __name__ == '__main__':
-  main(argv)
+    main(sys.argv)
 
-# vim:et:sw=2:ts=2
+# vim:et:sw=2:ts=4