support both lists and tuples in var-file arg (#66)

Author: ludoo

test/test_args.py

@@ -45,6 +45,8 @@
     ({'upgrade': False}, []),
     ({'tf_var_file': None}, []),
     ({'tf_var_file': 'foo.tfvar'}, ['-var-file=foo.tfvar']),
+    ({'tf_var_file': ['foo.tfvar', 'bar.tfvar']}, [
+     '-var-file=foo.tfvar', '-var-file=bar.tfvar']),
 )
 
 

tftest.py

@@ -151,9 +151,8 @@ def parse_args(init_vars=None, tf_vars=None, targets=None, **kw):
     cmd_args += [("-target={}".format(t)) for t in targets]
   if kw.get('tf_var_file'):
     tf_var_file = kw['tf_var_file']
-    if isinstance(tf_var_file, list):
-      for x in tf_var_file:
-        cmd_args.append('-var-file={}'.format(x))
+    if isinstance(tf_var_file, (list, tuple)):
+      cmd_args += ['-var-file={}'.format(v) for v in tf_var_file]
     else:
       cmd_args.append('-var-file={}'.format(tf_var_file))
   return cmd_args