joeduffy 6194a59798 Add a pre-pass to validate resources before creating/updating ... This change adds a new Check RPC method on the provider interface, permitting resource providers to perform arbitrary verification on the values of properties. This is useful for validating things that might be difficult to express in the type system, and it runs before *any* modifications are run (so failures can be caight early before it's too late). My favorite motivating example is verifying that an AWS EC2 instance's AMI is available within the target region. This resolves pulumi/coconut#107, although we aren't using this in any resource providers just yet. I'll add a work item now for that...		2017-03-02 18:15:38 -08:00
..
pkg/cocorpc	Add a pre-pass to validate resources before creating/updating	2017-03-02 18:15:38 -08:00