New outputs function

CHANGES.md

@@ -1,5 +1,8 @@
 # Changelog
 
+## 0.7.8
+- Add new function `outputs`, to query already deployed stack for their outputs
+
 ## 0.7.7
 - Add support for CLOUDBENDER_PROJECT_ROOT env variable to specify your root project 
 - Switch most os.path operations to pathlib to fix various corner cases caused by string matching

cloudbender/__init__.py

@@ -2,7 +2,7 @@ import logging
 
 __author__ = "Stefan Reimer"
 __email__ = "stefan@zero-downtimet.net"
-__version__ = "0.7.7"
+__version__ = "0.7.8"
 
 
 # Set up logging to ``/dev/null`` like a library is supposed to.

cloudbender/cli.py

@@ -80,6 +80,20 @@ def validate(cb, stack_names, multi):
         s.validate()
 
 
+@click.command()
+@click.argument("stack_names", nargs=-1)
+@click.option("--multi", is_flag=True, help="Allow more than one stack to match")
+@click.option("--include", default='.*', help="regex matching wanted outputs, default '.*'")
+@click.option("--values", is_flag=True, help="Only output values, most useful if only one outputs is returned")
+@click.pass_obj
+def outputs(cb, stack_names, multi, include, values):
+    """ Prints all stack outputs """
+
+    stacks = _find_stacks(cb, stack_names, multi)
+    for s in stacks:
+        s.get_outputs(include, values)
+
+
 @click.command()
 @click.argument("stack_name")
 @click.argument("change_set_name")
@@ -225,6 +239,7 @@ cli.add_command(provision)
 cli.add_command(delete)
 cli.add_command(clean)
 cli.add_command(create_change_set)
+cli.add_command(outputs)
 
 if __name__ == '__main__':
     cli(obj={})

cloudbender/stack.py

@@ -292,6 +292,30 @@ class Stack(object):
         else:
             logger.info("Passed.")
 
+    def get_outputs(self, include='.*', values=False):
+        """ Returns outputs of the stack as key=value """
+
+        try:
+            stacks = self.connection_manager.call(
+                "cloudformation",
+                "describe_stacks",
+                {'StackName': self.stackname},
+                profile=self.profile, region=self.region)['Stacks']
+
+            try:
+                logger.debug("Stack outputs for {} in {}:".format(self.stackname, self.region))
+                for output in stacks[0]['Outputs']:
+                    if re.search(include, output['OutputKey']):
+                        if values:
+                            print("{}".format(output['OutputValue']))
+                        else:
+                            print("{}={}".format(output['OutputKey'], output['OutputValue']))
+            except KeyError:
+                pass
+
+        except ClientError as e:
+            raise e
+
     def resolve_parameters(self):
         """ Renders parameters for the stack based on the source template and the environment configuration """