From dcc292fa677e692983d330dc2aca0f710cc9217c Mon Sep 17 00:00:00 2001
From: Binh Nguyen <ngbinh@gmail.com>
Date: Mon, 28 Mar 2016 00:33:07 +0700
Subject: [PATCH 1/2] Switch to use nodeJsEnv as default jsEnv to build
 scala.js

By default, scala.js compiler uses `Rhino` as the js environment. But it
usually requires a lot of memory and often lead to OOM. This PR replace
the default to a node.js one that should be much faster and slimer.
---
 .travis.yml | 7 +++++++
 build.sbt   | 6 +++++-
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/.travis.yml b/.travis.yml
index 30e14c9509..dd2a74d4c0 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,6 +10,10 @@ scala:
 script:
   - scripts/travis-publish.sh
 
+# http://austinpray.com/ops/2015/09/20/change-travis-node-version.html
+install:
+  - rm -rf ~/.nvm && git clone https://github.com/creationix/nvm.git ~/.nvm && (cd ~/.nvm && git checkout `git describe --abbrev=0 --tags`) && source ~/.nvm/nvm.sh && nvm install $TRAVIS_NODE_VERSION
+
 notifications:
   webhooks:
     urls:
@@ -21,12 +25,15 @@ env:
   global:
   - secure: Kf44XQFpq2QGe3rn98Dsf5Uz3WXzPDralS54co7sqT5oQGs1mYLYZRYz+I75ZSo5ffZ86H7M+AI9YFofqGwAjBixBbqf1tGkUh3oZp2fN3QfqzazGV3HzC+o41zALG5FL+UBaURev9ChQ5fYeTtFB7YAzejHz4y5E97awk934Rg=
   - secure: QbNAu0jCaKrwjJi7KZtYEBA/pYbTJ91Y1x/eLAJpsamswVOvwnThA/TLYuux+oiZQCiDUpBzP3oxksIrEEUAhl0lMtqRFY3MrcUr+si9NIjX8hmoFwkvZ5o1b7pmLF6Vz3rQeP/EWMLcljLzEwsrRXeK0Ei2E4vFpsg8yz1YXJg=
+  - TRAVIS_NODE_VERSION="4"
 cache:
   directories:
   - $HOME/.sbt/0.13/dependency
   - $HOME/.sbt/boot/scala*
   - $HOME/.sbt/launchers
   - $HOME/.ivy2/cache
+  - $HOME/.nvm
+
 before_cache:
   - du -h -d 1 $HOME/.ivy2/cache
   - du -h -d 2 $HOME/.sbt/
diff --git a/build.sbt b/build.sbt
index 51e15edba7..7ca986daf7 100644
--- a/build.sbt
+++ b/build.sbt
@@ -55,7 +55,11 @@ lazy val commonJsSettings = Seq(
     s"-P:scalajs:mapSourceURI:$a->$g/"
   },
   scalaJSStage in Global := FastOptStage,
-  parallelExecution := false
+  parallelExecution := false,
+  // Using Rhino as jsEnv to build scala.js code can lead to OOM, switch to PhantomJS by default
+  scalaJSUseRhino := false,
+  requiresDOM := false,
+  jsEnv := NodeJSEnv().value
 )
 
 lazy val commonJvmSettings = Seq(

From ed5e72274bab184845a7b0e0196be92edd2cbdc6 Mon Sep 17 00:00:00 2001
From: Binh Nguyen <ngbinh@gmail.com>
Date: Mon, 28 Mar 2016 07:24:20 +0700
Subject: [PATCH 2/2] Enable `batchMode` on scala.js Optimizer

The batchMode should help reduce the memory requirement to compile
scala.js code as per
https://github.com/scala-js/scala-js/issues/1788#issuecomment-178346142

Implementation details: botBuild is a sbt setting that will be turned
on on travisCi so that it will not interfere with local dev experience.
---
 .travis.yml | 1 +
 build.sbt   | 8 +++++++-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/.travis.yml b/.travis.yml
index dd2a74d4c0..b56b245cde 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -26,6 +26,7 @@ env:
   - secure: Kf44XQFpq2QGe3rn98Dsf5Uz3WXzPDralS54co7sqT5oQGs1mYLYZRYz+I75ZSo5ffZ86H7M+AI9YFofqGwAjBixBbqf1tGkUh3oZp2fN3QfqzazGV3HzC+o41zALG5FL+UBaURev9ChQ5fYeTtFB7YAzejHz4y5E97awk934Rg=
   - secure: QbNAu0jCaKrwjJi7KZtYEBA/pYbTJ91Y1x/eLAJpsamswVOvwnThA/TLYuux+oiZQCiDUpBzP3oxksIrEEUAhl0lMtqRFY3MrcUr+si9NIjX8hmoFwkvZ5o1b7pmLF6Vz3rQeP/EWMLcljLzEwsrRXeK0Ei2E4vFpsg8yz1YXJg=
   - TRAVIS_NODE_VERSION="4"
+  - CATS_BOT_BUILD=true
 cache:
   directories:
   - $HOME/.sbt/0.13/dependency
diff --git a/build.sbt b/build.sbt
index 7ca986daf7..1b1196f096 100644
--- a/build.sbt
+++ b/build.sbt
@@ -5,6 +5,8 @@ import sbtunidoc.Plugin.UnidocKeys._
 import ReleaseTransformations._
 import ScoverageSbtPlugin._
 
+lazy val botBuild = settingKey[Boolean]("Build by TravisCI instead of local dev environment")
+
 lazy val scoverageSettings = Seq(
   ScoverageKeys.coverageMinimum := 60,
   ScoverageKeys.coverageFailOnMinimum := false,
@@ -59,7 +61,11 @@ lazy val commonJsSettings = Seq(
   // Using Rhino as jsEnv to build scala.js code can lead to OOM, switch to PhantomJS by default
   scalaJSUseRhino := false,
   requiresDOM := false,
-  jsEnv := NodeJSEnv().value
+  jsEnv := NodeJSEnv().value,
+  // Only used for scala.js for now
+  botBuild := sys.props.getOrElse("CATS_BOT_BUILD", default="false") == "true",
+  // batch mode decreases the amount of memory needed to compile scala.js code
+  scalaJSOptimizerOptions := scalaJSOptimizerOptions.value.withBatchMode(botBuild.value)
 )
 
 lazy val commonJvmSettings = Seq(