From 9cbcfa9c1fb89efd0b4cdafdc4246ce027f74ebb Mon Sep 17 00:00:00 2001
From: Gregor Uhlenheuer <kongo2002@googlemail.com>
Date: Sat, 15 Dec 2018 01:14:31 +0100
Subject: Discover - break overridesRoutes into fixed size chunks (#509)

* Discover - break overridesRoutes into fixed size chunks

* Discover - simplify lambda creation

* add LargeProjectTests

* LargeProjectTests: remove Ydelambdafy
---
 main/core/src/define/Discover.scala | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

(limited to 'main/core')

diff --git a/main/core/src/define/Discover.scala b/main/core/src/define/Discover.scala
index f0c668e6..c7dab54c 100644
--- a/main/core/src/define/Discover.scala
+++ b/main/core/src/define/Discover.scala
@@ -79,9 +79,12 @@ object Discover {
       }
       if overridesRoutes.nonEmpty
     } yield {
+      // by wrapping the `overridesRoutes` in a lambda function we kind of work around
+      // the problem of generating a *huge* macro method body that finally exceeds the
+      // JVM's maximum allowed method size
+      val overridesLambda = q"(() => $overridesRoutes)()"
       val lhs =  q"classOf[${discoveredModuleType.typeSymbol.asClass}]"
-      val rhs = q"scala.Seq[(Int, mill.util.Router.EntryPoint[_])](..$overridesRoutes)"
-      q"$lhs -> $rhs"
+      q"$lhs -> $overridesLambda"
     }
 
     c.Expr[Discover[T]](q"mill.define.Discover(scala.collection.immutable.Map(..$mapping))")
-- 
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