Merge pull request #205 from jwendell/exec_shell

Execute entries with a single string as shell commands

bootstrapvz/plugins/image_commands/README.md

@@ -10,6 +10,12 @@ Plugin is defined in the manifest file, plugin section with:
 
 The *commands* element is an array of commands. Each command is an array describing the executable and its arguments.
 
+If you need shell expansion of wildcards, like __\*__, just put the entire command as a single entry:
+
+    "image_commands": {
+        "commands": [ [ "rm -f /tmp/*" ]],
+    }
+
 Command is executed in current context. It is possible to use variables to access the image or execute chroot commands in the image.
 
 Available variables are:

bootstrapvz/plugins/image_commands/tasks.py

@@ -11,4 +11,5 @@ class ImageExecuteCommand(Task):
 		from bootstrapvz.common.tools import log_check_call
 		for raw_command in info.manifest.plugins['image_commands']['commands']:
 			command = map(lambda part: part.format(root=info.root, **info.manifest_vars), raw_command)
-			log_check_call(command)
+			shell = len(command) == 1
+			log_check_call(command, shell=shell)