move CI to macos-latest (#212)

Author: SethTisue

.github/workflows/ci.yml

@@ -22,10 +22,10 @@ jobs:
     name: Build and Test
     strategy:
       matrix:
-        os: [ubuntu-latest, macos-12]
+        os: [ubuntu-latest, macos-latest]
         scala: [2.13.15]
         java:
-          - temurin@8
+          - zulu@8
           - temurin@11
           - temurin@17
           - temurin@21
@@ -37,11 +37,11 @@ jobs:
         with:
           fetch-depth: 0
 
-      - name: Setup Java (temurin@8)
-        if: matrix.java == 'temurin@8'
+      - name: Setup Java (zulu@8)
+        if: matrix.java == 'zulu@8'
         uses: actions/setup-java@v4
         with:
-          distribution: temurin
+          distribution: zulu
           java-version: 8
           cache: sbt
 
@@ -103,19 +103,19 @@ jobs:
       matrix:
         os: [ubuntu-latest]
         scala: [2.13.15]
-        java: [temurin@8]
+        java: [zulu@8]
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout current branch (full)
         uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
-      - name: Setup Java (temurin@8)
-        if: matrix.java == 'temurin@8'
+      - name: Setup Java (zulu@8)
+        if: matrix.java == 'zulu@8'
         uses: actions/setup-java@v4
         with:
-          distribution: temurin
+          distribution: zulu
           java-version: 8
           cache: sbt
 

build.sbt

@@ -15,18 +15,9 @@ inThisBuild(Seq[Setting[_]](
     Developer("retronym", "Jason Zaugg", "@retronym", url("https://github.com/retronym")),
   ),
   scalacOptions := Seq("-feature", "-deprecation", "-Xlint", "-Werror"),
-  // since April 2024 or so, macos-latest gives us a machine that doesn't
-  // have sbt installed (actions/setup-java#627). if we weren't using
-  // sbt-github-actions it would be easy to just edit the workflow directly to
-  // use `brew install sbt`, but it's easier to just stay on macos-12 for as
-  // long as it remains available. I've reported the issue upstream at
-  // sbt/sbt-github-actions#185 . if we do move
-  // to macos-latest, note that it doesn't have temurin@8 anymore (as per
-  // actions/setup-java#625), so we'd also need to change that entry (a few
-  // lines below) from "temurin" to "zulu"
-  githubWorkflowOSes := Seq("ubuntu-latest", "macos-12"),
+  githubWorkflowOSes := Seq("ubuntu-latest", "macos-latest"),
   githubWorkflowJavaVersions := Seq(
-    JavaSpec.temurin("8"),
+    JavaSpec.zulu("8"),  // macos-latest lacks Temurin 8
     JavaSpec.temurin("11"),
     JavaSpec.temurin("17"),
     JavaSpec.temurin("21"),