Scala.js support

Resolves #53

.travis.yml

@@ -1,10 +1,6 @@
-language: scala
-sudo: false
-jdk:
-- oraclejdk8
-
-before_install:
- - git fetch --tags
+# parts of this were adapted from https://github.com/higherkindness/droste/blob/bad7dae60a0c32e66918613068d6713d209cc6b4/.travis.yml
+language: nix
+sudo: required
 
 stages:
  - name: test
@@ -14,26 +10,44 @@ stages:
 jobs:
  include:
  - env: TEST="docs"
- script: sbt docs/mdoc
- - env: TEST="test"
- script: sbt +test
+ script: ./scripts/builds.sh docs
+ - env: TEST="test JVM"
+ script: ./scripts/builds.sh testJVM
+ - env: TEST="test JS"
+ script: ./scripts/builds.sh testJS
+ - env: TEST="lint"
+ script: ./scripts/builds.sh lint
  - env: TEST="coverage"
- script: sbt coverage test && sbt coverageReport && bash <(curl -s https://codecov.io/bash)
+ script: ./scripts/builds.sh coverage
  - stage: release
- script: sbt ci-release
+ script: ./scripts/builds.sh release
+
+before_install:
+ - git fetch --tags
+
+install: |
+ if [ "$(ls -A $HOME/nix-cache)" ]; then
+ sudo rm -rf /nix/*
+ cp -a $HOME/nix-cache/* /nix
+ fi
 
 # These directories are cached to S3 at the end of the build
 cache:
-directories:
- - $HOME/.sbt/1.0/dependency
- - $HOME/.sbt/boot/scala*
- - $HOME/.sbt/launchers
- - $HOME/.ivy2/cache
- - $HOME/.coursier
+ directories:
+ - $HOME/.sbt/1.0/dependency
+ - $HOME/.sbt/boot/scala*
+ - $HOME/.sbt/launchers
+ - $HOME/.ivy2/cache
+ - $HOME/.coursier
+ - $HOME/nix-cache
 
 before_cache:
  - du -h -d 1 $HOME/.ivy2/cache
  - du -h -d 2 $HOME/.sbt/
  - find $HOME/.sbt -name "*.lock" -type f -delete
  - find $HOME/.ivy2/cache -name "ivydata-*.properties" -type f -delete
  - rm -rf $HOME/.ivy2/local
+ - |
+ if [ ! "$(ls -A $HOME/nix-cache)" ]; then
+ cp -a /nix/* $HOME/nix-cache
+ fi

build.sbt

@@ -1,7 +1,22 @@
-import dependencies._
+// shadow sbt-scalajs' crossProject and CrossType from Scala.js 0.6.x
+import sbtcrossproject.CrossPlugin.autoImport.{crossProject, CrossType}
 
 val stableVersion = "0.2.1"
 
+val catsVersion = "1.4.0"
+val scalacheckVersion = "1.13.5"
+val drosteVersion = "0.6.0"
+val fastParseVersion = "2.1.0"
+
+val catsOrg = "org.typelevel"
+
+val scalacheckOrg = "org.scalacheck"
+
+val drosteOrg = "io.higherkindness"
+
+val isTravisBuild =
+ settingKey[Boolean]("Flag indicating whether the current build is running under Travis")
+
 inThisBuild(
  List(
  organization := "net.ceedubs",
@@ -14,46 +29,61 @@ inThisBuild(
  "[email protected]",
  url("https://github.com/ceedubs")
  )
- )
+ ),
+ isTravisBuild := sys.env.get("TRAVIS").isDefined
  ))
 
 coverageExcludedPackages in ThisBuild := "ceedubs.irrec.bench"
 
-lazy val kleene = (project in file("kleene"))
+lazy val kleene = crossProject(JSPlatform, JVMPlatform)
+ .crossType(CrossType.Pure)
+ .in(file("kleene"))
  .settings(
  moduleName := "irrec-kleene",
- libraryDependencies ++= Seq(cats.core, cats.testkit % Test))
+ libraryDependencies += catsOrg %%% "cats-core" % catsVersion)
  .settings(commonSettings)
 
-lazy val regex = (project in file("regex"))
- .settings(moduleName := "irrec-regex", libraryDependencies ++= Seq(droste, cats.testkit % Test))
+lazy val regex = crossProject(JSPlatform, JVMPlatform)
+ .crossType(CrossType.Pure)
+ .in(file("regex"))
+ .dependsOn(kleene)
+ .settings(
+ moduleName := "irrec-regex",
+ libraryDependencies += drosteOrg %%% "droste-core" % drosteVersion)
  .settings(commonSettings)
- // see https://github.com/sbt/sbt/issues/2698#issuecomment-311417188
+
+lazy val tests = crossProject(JSPlatform, JVMPlatform)
+ .crossType(CrossType.Pure)
+ .in(file("tests"))
+ .dependsOn(regexGen, parser)
  .settings(
- unmanagedClasspath in Test ++=
-  (fullClasspath in (regexGenRef, Compile)).value ++
-  (fullClasspath in (parserRef, Compile)).value)
- .dependsOn(kleene % "test->test;compile->compile")
+ moduleName := "irrec-tests",
+ libraryDependencies += catsOrg %%% "cats-testkit" % catsVersion % Test)
+ .settings(commonSettings)
+ .settings(noPublishSettings)
 
-lazy val regexGen = (project in file("regex-gen"))
+lazy val regexGen = crossProject(JSPlatform, JVMPlatform)
+ .crossType(CrossType.Pure)
+ .dependsOn(kleene, regex)
+ .in(file("regex-gen"))
  .settings(
  moduleName := "irrec-regex-gen",
- libraryDependencies ++= Seq(scalacheck, cats.testkit % Test))
+ libraryDependencies += scalacheckOrg %%% "scalacheck" % scalacheckVersion)
  .settings(commonSettings)
- .dependsOn(regex % "test->test;compile->compile")
 
-lazy val regexGenRef = LocalProject("regexGen")
-
-lazy val parser = (project in file("parser"))
- .settings(moduleName := "irrec-parser", libraryDependencies += fastparse)
+lazy val parser = crossProject(JSPlatform, JVMPlatform)
+ .crossType(CrossType.Pure)
+ .in(file("parser"))
+ .settings(
+ moduleName := "irrec-parser",
+ libraryDependencies += "com.lihaoyi" %%% "fastparse" % fastParseVersion)
  .settings(commonSettings)
- .dependsOn(regex % "test->test;compile->compile", regexGen % Test)
-
-lazy val parserRef = LocalProject("parser")
+ .dependsOn(kleene, regex)
 
-lazy val docs = (project in file("irrec-docs"))
+lazy val docs = project
+ .in(file("irrec-docs"))
  .enablePlugins(MdocPlugin)
- .dependsOn(regex, regexGen, parser)
+ .dependsOn(regex.jvm, regexGen.jvm, parser.jvm)
  .settings(
  mdocOut := (baseDirectory in LocalRootProject).value,
  mdocVariables := Map(
@@ -63,18 +93,35 @@ lazy val docs = (project in file("irrec-docs"))
  )
  .settings(noPublishSettings)
 
-lazy val benchmarks = (project in file("benchmarks"))
+lazy val benchmarks = project
+ .in(file("benchmarks"))
  .settings(moduleName := "irrec-benchmarks")
  .enablePlugins(JmhPlugin)
  .settings(commonSettings)
  .settings(noPublishSettings)
- .dependsOn(regex)
+ .dependsOn(regex.jvm)
+
+lazy val jvm = project
+ .settings(
+ moduleName := "irrec-root-jvm"
+ )
+ .aggregate(kleene.jvm, regex.jvm, regexGen.jvm, parser.jvm, tests.jvm, benchmarks)
+ .settings(commonSettings)
+ .settings(noPublishSettings)
+
+lazy val js = project
+ .settings(
+ moduleName := "irrec-root-js"
+ )
+ .aggregate(kleene.js, regex.js, regexGen.js, parser.js, tests.js)
+ .settings(commonSettings)
+ .settings(noPublishSettings)
 
 lazy val root = project
  .settings(
  moduleName := "irrec-root"
  )
- .aggregate(kleene, regex, regexGen, parser)
+ .aggregate(jvm, js)
  .settings(commonSettings)
  .settings(noPublishSettings)
 
@@ -160,6 +207,12 @@ val commonSettings: Seq[Setting[_]] = Seq(
  crossScalaVersions := List("2.11.12", "2.12.8")
 ) ++ scalacOptionSettings
 
+val commonJsSettings: Seq[Setting[_]] = Seq(
+ parallelExecution := false,
+ // batch mode decreases the amount of memory needed to compile Scala.js code
+ scalaJSOptimizerOptions := scalaJSOptimizerOptions.value.withBatchMode(isTravisBuild.value)
+)
+
 val noPublishSettings = Seq(
  publish := {},
  publishLocal := {},

project/plugins.sbt

@@ -4,3 +4,5 @@ addSbtPlugin("org.scoverage" % "sbt-scoverage" % "1.5.1")
 addSbtPlugin("pl.project13.scala" % "sbt-jmh" % "0.3.4")
 addSbtPlugin("com.geirsson" % "sbt-ci-release" % "1.2.6")
 addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.0.0")
+addSbtPlugin("org.portable-scala" % "sbt-scalajs-crossproject" % "0.6.0")
+addSbtPlugin("org.scala-js" % "sbt-scalajs" % "0.6.28")

scripts/builds.sh

@@ -0,0 +1,32 @@
+#! /usr/bin/env nix-shell
+#! nix-shell ../shell.nix -i bash
+
+# adapted from https://github.com/higherkindness/droste/blob/bad7dae60a0c32e66918613068d6713d209cc6b4/scripts/ci-jobs.sh
+
+set -euxo pipefail
+
+case "$1" in
+ "docs")
+ sbt 'docs/mdoc'
+ ;;
+ "lint")
+ sbt 'lint'
+ ;;
+ "testJVM")
+ sbt '+jvm/test'
+ ;;
+ "testJS")
+ sbt '+js/test'
+ ;;
+ "coverage")
+ sbt ';coverage;jvm/test;coverageReport'
+ bash <(curl -s https://codecov.io/bash)
+ ;;
+ "release")
+ sbt 'ci-release'
+ ;;
+ *)
+ echo "no command specified!"
+ exit 1
+ ;;
+esac

shell.nix

@@ -28,5 +28,6 @@ in
  sbt
  git # used by sbt-dynver
  graphviz # used for ScalaDoc diagrams
+ nodejs # used by scala.js
  ];
  }