Towards Auto API

[pawelprazak]

Part of #254

Goal: 90% of MVP

The scope:

• internal sync implementation with ~90% feature coverage

Out of scope:

• RemoteWorkspace implementation
• async implementation
• inline programs (work in progress, but not complete)
• missing GetPermalink implementation
• missing event streams / log file streaming / tailer exposed to the user
• missing progress / error stream / unix pipe streams exposed to the user
• using custom execution context for the language server and shell
• fix serialization issues in yaml and json
• no logger

API surface missing, notable details:

  /** Allows specifying one or more Writers to redirect incremental preview stdout
    */
  case class ProgressStreams(writers: os.ProcessOutput*) extends PreviewOption

  /** Allows specifying one or more Writers to redirect incremental preview stderr
    */
  case class ErrorProgressStreams(writers: os.ProcessOutput*) extends PreviewOption

  /** Allows specifying one or more channels to receive the Pulumi event stream
    */
  case class EventStreams(channels: EngineEvent*) extends PreviewOption