[WIP] Support React Refresh

bin/ci

@@ -13,10 +13,10 @@ fi
 
 case "${1:-}" in
   "")
-    "$0" 2
+    ../bin/"$0" 2
     echo
     echo
-    "$0" 3
+    ../bin/"$0" 3
     exit 0
     ;;
   2|3)
@@ -40,6 +40,7 @@ echo
 rm -rf */target/scala-*/{,test-}classes
 cmd=(
   sbt
+    -DCI=1
     -J-Xmx3G
     -J-XX:+UseG1GC
     ++$SCALA_VER

bin/mima

@@ -0,0 +1,39 @@
+#!/bin/bash
+set -euo pipefail
+cd "$(dirname "$0")/../library"
+
+if [ $# -gt 1 ]; then
+  echo "Usage: $0 [<scala ver>]"
+  echo ""
+  echo "Where"
+  echo "  <scala ver> = 2 or 3"
+  echo
+  exit 1
+fi
+
+case "${1:-}" in
+  "")
+    ../bin/"$0" 2
+    echo
+    echo
+    ../bin/"$0" 3
+    exit 0
+    ;;
+  2|3)
+    SCALA_VER="$(../bin/get_scala_version $1)"
+    echo "Scala version: $SCALA_VER"
+    ;;
+  *)
+    echo "Unrecognised version: $1" >&2
+    exit 2
+    ;;
+esac
+
+# Test upstream
+# rm -rf */target/scala-*/{,test-}classes
+sbt ++$SCALA_VER publishLocal
+
+# Test downstream
+SCALA_MAJOR_VER="${SCALA_VER:0:1}"
+cd ../downstream-tests
+sbt ++$SCALA_VER mima200/clean mima200/fastOptJS

downstream-tests/build.sbt

@@ -14,11 +14,12 @@ def scalacCommonFlags: Seq[String] = Seq(
   "-language:higherKinds",
   "-language:existentials",
   "-unchecked",
+  "-Wconf:msg=may.not.be.exhaustive:e",            // Make non-exhaustive matches errors instead of warnings
+  "-Wconf:msg=Reference.to.uninitialized.value:e", // Make uninitialised value calls errors instead of warnings
+  "-Wconf:msg=macrotask:s",                        // stfu about macrotasks
 )
 
 def scalac2Flags = Seq(
-  "-Wconf:msg=may.not.be.exhaustive:e",            // Make non-exhaustive matches errors instead of warnings
-  "-Wconf:msg=Reference.to.uninitialized.value:e", // Make uninitialised value calls errors instead of warnings
   "-Wunused:explicits",                            // Warn if an explicit parameter is unused.
   "-Wunused:implicits",                            // Warn if an implicit parameter is unused.
   "-Wunused:imports",                              // Warn if an import selector is not referenced.

downstream-tests/mima-2.0.0/src/main/scala/downstream/mima200/HookUseReducer.scala

@@ -0,0 +1,29 @@
+package downstream.mima200
+
+import japgolly.scalajs.react._
+import japgolly.scalajs.react.vdom.html_<^._
+
+// Because in `object Hooks.UseReducer`, I changed `private def _unsafeCreate` to `def fromJs`
+object HookUseReducer {
+
+  final case class PI(pi: Int) {
+    def unary_- : PI = PI(-pi)
+    def *(n: Int): PI = PI(pi * n)
+    def +(n: Int): PI = PI(pi + n)
+    def +(n: PI): PI = PI(pi + n.pi)
+  }
+
+  private def add(n: Int): (Int, Int) => Int = _ + _ + n
+
+  val comp = ScalaFnComponent.withHooks[PI]
+    .useReducer(add(0), 100)
+    .useReducerBy((_, s1) => add(s1.value), (p, s1) => p.pi + s1.value)
+    .useReducerBy($ => add($.hook1.value), $ => $.props.pi + $.hook1.value + $.hook2.value)
+    .render((p, s1, s2, s3) =>
+      <.div(
+        <.div(s"P=$p, s1=${s1.value}, s2=${s2.value}, s3=${s3.value}"),
+        <.button(^.onClick --> s1.dispatch(1)),
+        <.button(^.onClick --> s2.dispatch(10)),
+        <.button(^.onClick --> s3.dispatch(100)),
+    ))
+}

downstream-tests/mima-2.0.0/src/main/scala/downstream/mima200/HookUseRefToJsComponent.scala

@@ -0,0 +1,16 @@
+package downstream.mima200
+
+import japgolly.scalajs.react._
+import japgolly.scalajs.react.vdom.html_<^._
+
+// Because `useRefToJsComponent` didn't need the `CT0` arg so I removed it.
+object HookUseRefToJsComponent {
+
+  val jsComp = JsComponent.force[Null, Children.None, Null](null)
+
+  val comp = ScalaFnComponent.withHooks[Unit]
+    .useRefToJsComponent(jsComp)
+    .render { (_, ref) =>
+      jsComp.withRef(ref)()
+    }
+}

downstream-tests/version.sbt

@@ -0,0 +1 @@
+../library/version.sbt

library/aliases.sbt

@@ -1,11 +1,20 @@
-addCommandAlias("CB", "project coreBundleCallback")
-addCommandAlias("CE", "project coreBundleCatsEffect")
-addCommandAlias("CG", "project coreGeneric")
-addCommandAlias("E",  "project extra")
-addCommandAlias("FM", "project facadeMain")
-addCommandAlias("FT", "project facadeTest")
-addCommandAlias("GH", "project ghpages")
-addCommandAlias("M2", "project extraExtMonocle2")
-addCommandAlias("M3", "project extraExtMonocle3")
-addCommandAlias("TS", "project tests")
-addCommandAlias("TU", "project testUtil")
+addCommandAlias("CB",  "project coreBundleCallback")
+addCommandAlias("CE",  "project coreBundleCatsEffect")
+addCommandAlias("CG",  "project coreGeneric")
+addCommandAlias("E",   "project extra")
+addCommandAlias("FM",  "project facadeMain")
+addCommandAlias("FT",  "project facadeTest")
+addCommandAlias("GH",  "project ghpages")
+addCommandAlias("M2",  "project extraExtMonocle2")
+addCommandAlias("M3",  "project extraExtMonocle3")
+addCommandAlias("TE",  "project testEmissions")
+addCommandAlias("TEJ", "project testEmissionsJS")
+addCommandAlias("TT",  "project tests")
+addCommandAlias("TU",  "project testUtil")
+
+addCommandAlias("tcc", "compile; Test/clean; Test/compile")
+addCommandAlias("tt",  "tests/test")
+addCommandAlias("th",  "coreGeneric/compile; tests/testOnly *Hook*")
+addCommandAlias("thc", "coreGeneric/compile; tests/Test/clean; tests/testOnly *Hook*")
+addCommandAlias("te",  "testEmissions/test")
+addCommandAlias("tec", "testEmissionsJS/clean;testEmissions/test")

library/bin/remove_test_emissions

@@ -0,0 +1,8 @@
+#!/bin/bash
+
+cd "$(dirname "$0")/.." || exit 1
+[ $# -ne 1 ] && echo "Usage: $0 <scala major-version>" && exit 1
+
+set -euo pipefail
+
+rm -fv ./testEmissions/jvm/src/test/resources/rr-sjr/*-out"$1".js

library/build.sbt

@@ -23,9 +23,11 @@ val ghpages               = ScalaJsReact.ghpages
 val ghpagesMacros         = ScalaJsReact.ghpagesMacros
 val root                  = ScalaJsReact.root
 val scalafixRules         = ScalaJsReact.scalafixRules
+val testEmissions         = ScalaJsReact.testEmissions
+val testEmissionsJS       = ScalaJsReact.testEmissionsJS
 val tests                 = ScalaJsReact.tests
-val testUtilMacros        = ScalaJsReact.testUtilMacros
 val testUtil              = ScalaJsReact.testUtil
+val testUtilMacros        = ScalaJsReact.testUtilMacros
 val util                  = ScalaJsReact.util
 val utilCatsEffect        = ScalaJsReact.utilCatsEffect
 val utilDummyDefaults     = ScalaJsReact.utilDummyDefaults