Merge pull request #118 from mkurz/macos-latest_no-sbt

CI: Exclude `temurin@8`/`macos-latest` and manually install `sbt` on macOS

.github/workflows/ci.yml

@@ -25,6 +25,9 @@ jobs:
         os: [ubuntu-latest, macos-latest, windows-latest]
         scala: [2.12.19]
         java: [temurin@8, temurin@11, temurin@17, temurin@21]
+        exclude:
+          - java: temurin@8
+            os: macos-latest
     runs-on: ${{ matrix.os }}
     steps:
       - name: Ignore line ending differences in git
@@ -77,6 +80,11 @@ jobs:
           java-version: 21
           cache: sbt
 
+      - name: Install sbt
+        if: matrix.os == 'macos-latest'
+        shell: bash
+        run: brew install sbt
+
       - name: Check that workflows are up to date
         shell: bash
         run: sbt '++ ${{ matrix.scala }}' githubWorkflowCheck

.gitignore

@@ -18,3 +18,5 @@ project/plugins/project/
 
 # virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
 hs_err_pid*
+
+.bsp/

build.sbt

@@ -83,3 +83,16 @@ ThisBuild / githubWorkflowJavaVersions := Seq(
   JavaSpec.temurin("17"),
   JavaSpec.temurin("21")
 )
+
+ThisBuild / githubWorkflowBuildMatrixExclusions += MatrixExclude(Map("java" -> "temurin@8", "os" -> "macos-latest"))
+
+// GitHub Actions macOS 13+ runner images do not come with sbt preinstalled anymore
+ThisBuild / githubWorkflowBuildPreamble ++= Seq(
+  WorkflowStep.Run(
+    commands = List(
+      "brew install sbt"
+    ),
+    cond = Some("matrix.os == 'macos-latest'"),
+    name = Some("Install sbt")
+  )
+)