pulumi/pkg/backend/backend.go
joeduffy 2eb86b24c2 Make some updates based on CR feedback
This change implements some feedback from @ellismg.

* Make backend.Stack an interface and let backends implement it,
  enabling dynamic type testing/casting to access information
  specific to that backend.  For instance, the cloud.Stack conveys
  the cloud URL, org name, and PPC name, for each stack.

* Similarly expose specialized backend.Backend interfaces,
  local.Backend and cloud.Backend, to convey specific information.

* Redo a bunch of the commands in terms of these.

* Keeping with this theme, turn the CreateStack options into an
  opaque interface{}, and let the specific backends expose their
  own structures with their own settings (like PPC name in cloud).

* Show both the org and PPC names in the cloud column printed in
  the stack ls command, in addition to the Pulumi Cloud URL.

Unrelated, but useful:

* Special case the 401 HTTP response and make a friendly error,
  to tell the developer they must use `pulumi login`.  This is
  better than tossing raw "401: Unauthorized" errors in their face.

* Change the "Updating stack '..' in the Pulumi Cloud" message to
  use the correct action verb ("Previewing", "Destroying", etc).
2017-12-03 08:10:50 -08:00

39 lines
2 KiB
Go

// Copyright 2016-2017, Pulumi Corporation. All rights reserved.
// Package backend encapsulates all extensibility points required to fully implement a new cloud provider.
package backend
import (
"github.com/pulumi/pulumi/pkg/engine"
"github.com/pulumi/pulumi/pkg/operations"
"github.com/pulumi/pulumi/pkg/tokens"
)
// Backend is an interface that represents actions the engine will interact with to manage stacks of cloud resources.
// It can be implemented any number of ways to provide pluggable backend implementations of the Pulumi Cloud.
type Backend interface {
// Name returns a friendly name for this backend.
Name() string
// GetStack returns a stack object tied to this backend with the given name, or nil if it cannot be found.
GetStack(name tokens.QName) (Stack, error)
// CreateStack creates a new stack with the given name and options that are specific to the backend provider.
CreateStack(name tokens.QName, opts interface{}) error
// RemoveStack removes a stack with the given name. If force is true, the stack will be removed even if it
// still contains resources. Otherwise, if the stack contains resources, a non-nil error is returned, and the
// first boolean return value will be set to true.
RemoveStack(name tokens.QName, force bool) (bool, error)
// ListStacks returns a list of stack summaries for all known stacks in the target backend.
ListStacks() ([]Stack, error)
// Preview initiates a preview of the current workspace's contents.
Preview(stackName tokens.QName, debug bool, opts engine.PreviewOptions) error
// Update updates the target stack with the current workspace's contents (config and code).
Update(stackName tokens.QName, debug bool, opts engine.DeployOptions) error
// Destroy destroys all of this stack's resources.
Destroy(stackName tokens.QName, debug bool, opts engine.DestroyOptions) error
// GetLogs fetches a list of log entries for the given stack, with optional filtering/querying.
GetLogs(stackName tokens.QName, query operations.LogQuery) ([]operations.LogEntry, error)
}