Merge pull request #73 from mhahn/info-command

Add action for getting information on stacks

Author: phobologic

stacker/actions/info.py

@@ -0,0 +1,27 @@
+import logging
+
+from .base import BaseAction
+from .. import exceptions
+
+logger = logging.getLogger(__name__)
+
+
+class Action(BaseAction):
+    """Get information on CloudFormation stacks.
+
+    Displays the outputs for the set of CloudFormation stacks.
+
+    """
+
+    def run(self, *args, **kwargs):
+        logger.info('Outputs for stacks: %s', self.context.get_fqn())
+        for stack in self.context.get_stacks():
+            try:
+                provider_stack = self.provider.get_stack(stack.fqn)
+            except exceptions.StackDoesNotExist:
+                logger.info('Stack "%s" does not exist.' % (stack.fqn,))
+                continue
+
+            logger.info('%s:', stack.fqn)
+            for output in provider_stack.outputs:
+                logger.info('\t%s: %s', output.key, output.value)

stacker/commands/stacker/__init__.py

@@ -2,6 +2,7 @@
 
 from .build import Build
 from .destroy import Destroy
+from .info import Info
 from .base import BaseCommand
 from ...context import Context
 from ...providers import aws
@@ -10,7 +11,7 @@
 class Stacker(BaseCommand):
 
     name = 'stacker'
-    subcommands = (Build, Destroy)
+    subcommands = (Build, Destroy, Info)
 
     def configure(self, options, **kwargs):
         super(Stacker, self).configure(options, **kwargs)

stacker/commands/stacker/info.py

@@ -0,0 +1,27 @@
+"""Gets information on the CloudFormation stacks based on the given config."""
+
+from .base import BaseCommand
+from ...actions import info
+
+
+class Info(BaseCommand):
+
+    name = 'info'
+    description = __doc__
+
+    def add_arguments(self, parser):
+        super(Info, self).add_arguments(parser)
+        parser.add_argument("--stacks", action="append",
+                            metavar="STACKNAME", type=str,
+                            help="Only work on the stacks given. Can be "
+                                 "specified more than once. If not specified "
+                                 "then stacker will work on all stacks in the "
+                                 "config file.")
+
+    def run(self, options, **kwargs):
+        super(Info, self).run(options, **kwargs)
+        action = info.Action(options.context, provider=options.provider)
+        action.execute()
+
+    def get_context_kwargs(self, options, **kwargs):
+        return {'stack_names': options.stacks}