tree 0184d8b1eb3828cf23abaf5fbb2fa25ea104d8cc
parent 6987932bb9222b19164ec873610ecc944f34a579
author Robert Findley <rfindley@google.com> 1637079107 -0500
committer Robert Findley <rfindley@google.com> 1637354165 +0000

examples: derive examples from the examples directory

With the gotip playground we may want to swap out examples with greater
frequency, to demonstrate new features at Go tip. Make this easier by
deriving examples directly from the examples directory via a new
examplesHandler type. This also enables having dynamic content for
hello.txt, which depends on the value of runtime.GoVersion().

This will impact the non-tip playground in a few ways:
- We will now pre-load examples at server start up.
- Examples will be sorted by their title (with the exception of Hello,
  playground, which is always first).
- We will set a CORS header for examples. This was added for consistency
  with other handlers, and seems harmless.

Generalize TestShare to TestServer, and use it to test the examples
handler.

Add a single gotip example demonstrating generics.

Updates golang/go#48517

Change-Id: I7ab58eb391829d581f7aeae95c291666be5718b9
Reviewed-on: https://go-review.googlesource.com/c/playground/+/364374
Trust: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Alexander Rakoczy <alex@golang.org>