Simplify build config

Author: armanbilge

.github/workflows/ci.yml

@@ -25,20 +25,12 @@ jobs:
     name: Build and Test
     strategy:
       matrix:
-        os: [ubuntu-latest, macos-latest]
+        os: [ubuntu-latest]
         scala: [2.11.12, 2.12.15, 2.13.7, 3.0.2]
         java: [temurin@11]
-        ci: [ciNode, ciFirefox, ciChrome, ciSafari, ciJSDOMNodeJS]
-        exclude:
+        ci: [ciNode, ciFirefox, ciChrome, ciJSDOMNodeJS]
+        include:
           - ci: ciSafari
-            os: ubuntu-latest
-          - ci: ciNode
-            os: macos-latest
-          - ci: ciFirefox
-            os: macos-latest
-          - ci: ciChrome
-            os: macos-latest
-          - ci: ciJSDOMNodeJS
             os: macos-latest
     runs-on: ${{ matrix.os }}
     steps:

build.sbt

@@ -50,7 +50,7 @@ ThisBuild / crossScalaVersions := Seq("2.11.12", "2.12.15", "2.13.7", "3.0.2")
 
 val PrimaryOS = "ubuntu-latest"
 val MacOS = "macos-latest"
-ThisBuild / githubWorkflowOSes := Seq(PrimaryOS, MacOS)
+ThisBuild / githubWorkflowOSes := Seq(PrimaryOS)
 
 ThisBuild / githubWorkflowBuildPreamble ++= Seq(
   WorkflowStep.Use(
@@ -63,11 +63,9 @@ ThisBuild / githubWorkflowBuildPreamble ++= Seq(
     name = Some("Install jsdom"),
     cond = Some("matrix.ci == 'ciJSDOMNodeJS'")))
 
-val ciVariants = List("ciNode", "ciFirefox", "ciChrome", "ciSafari", "ciJSDOMNodeJS")
+val ciVariants = List("ciNode", "ciFirefox", "ciChrome", "ciJSDOMNodeJS")
 
-ThisBuild / githubWorkflowBuildMatrixExclusions += MatrixExclude(Map("ci" -> "ciSafari", "os" -> PrimaryOS))
-ThisBuild / githubWorkflowBuildMatrixExclusions ++= ciVariants.filter(_ != "ciSafari")
-  .map(ci => MatrixExclude(Map("ci" -> ci, "os" -> MacOS)))
+ThisBuild / githubWorkflowBuildMatrixInclusions += MatrixInclude(Map.empty, Map("ci" -> "ciSafari", "os" -> MacOS))
 
 ThisBuild / githubWorkflowBuildMatrixAdditions += "ci" -> ciVariants