convert so they handle argsfiles rather than arguments

library/git

@@ -37,8 +37,31 @@ import subprocess
 # to a dictionary
 # FIXME: make more idiomatic
 
-args = " ".join(sys.argv[1:])
+if len(sys.argv) == 1:
+    print json.dumps({
+        "failed" : True,
+        "msg"    : "the command module requires arguments (-a)"
+    })
+    sys.exit(1)
+
+argfile = sys.argv[1]
+if not os.path.exists(argfile):
+    print json.dumps({
+        "failed" : True,
+        "msg"    : "Argument file not found"
+    })
+    sys.exit(1)
+
+args = open(argfile, 'r').read()
 items = shlex.split(args)
+
+if not len(items):
+    print json.dumps({
+        "failed" : True,
+        "msg"    : "the command module requires arguments (-a)"
+    })
+    sys.exit(1)
+
 params = {}
 for x in items:
     (k, v) = x.split("=")