This is a comprehensive solution to the "flaky PackageServer tests"
problem. It rules out port conflicts and imposes no limits on test
parallelism. The same solution can be used for other test servers
in the future.
Major changes:
- Turn `PackageServer` from a singleton into a class that is
instantiated per test class or test method.
- Start the server the first time its `port` property is read.
Bind the server to an ephemeral port instead of port 12110.
- For every test that uses `PackageServer`, pass the server port to
`--test-port`, `HttpClient.Builder.setTestPort`, the `CliBaseOptions`
or `ExecutorOptions` constructor, or the Gradle plugin's `testPort` property.
Wire all of these to `RequestRewritingClient`'s `testPort` constructor parameter.
- Enhance `RequestRewritingClient` to replace port 12110 with `testPort`
in request URIs unless `testPort` is -1 (its default).
- Introduce `ExecutorOptions.Builder`.
This makes executor options more comfortable to create
and allows to hide options such as `testPort`.
- Deprecate the `ExecutorOptions` constructor to steer users towards the builder.
- Get rid of `ExecutorOptions2`, which is no longer needed.
- Clean up `EmbeddedExecutorTest` with the help of the builder.
This reverts commit 7f404fff49.
The package is derived from the module name.
Having `module com.example.Foo` in Pkl
will create Kotlin `package com.example`.
Eventually, we may want to introduce a way to map
Pkl names to package names that provides finer
controls to the code generator.
