Add support for union types that indicate a default type for targets
that do not support unions, or do not support unions in certain
positions (e.g. output properties). The NodeJS backend makes use of this
in combination with a new flag, `disableUnionOutputTypes`, to avoid
generating unions in output types.
These changes also refactor the various module ->
package/module/namespace mapping methods so that these entities can be
fetched by their language name rather than their token.
These changes are necessary in order to move tfgen over to the schema
code generator.
The schema generator for tfgen has an annoying behavior for nested types
in which it does not separate input and output types. Worse, the shape
of the type that results from a collision of input and output types is
order-dependent: whichever of the two was observed last wins (note that
the shape is still determenistic, as the order in which types are
recorded is always the same). As a result, the NodeJS code generator
needs to know the set of required properties for the other aspect of the
type in order to generate proper code.
Contributes to
https://github.com/pulumi/pulumi-terraform-bridge/issues/179.
- Add support for constant values in unions (e.g. `"foo" | "bar"`)
- Generate `Input<T | U>` instead of `Input<T> | Input<U>`
- Emit deprecation messages for resources
- Handle nil state inputs
- Allow packages to provide a README
- Remove sync invoke support
These changes are part of
https://github.com/pulumi/pulumi-terraform-bridge/issues/179, and
restore functional parity with the current `tfgen` generator.
