Make CI commands adequately scoped on Scala version

.github/workflows/ci.yml

@@ -28,12 +28,12 @@ jobs:
           java-version: ${{ matrix.jdk }}
 
       - name: Check formatting
-        run: sbt ++${{ matrix.scala-version }} scalafmtCheckAll scalafmtSbtCheck
+        run: sbt "++${{ matrix.scala-version }} scalafmtCheckAll" scalafmtSbtCheck
 
         # Consider joining this action with the "Check formatting" one once Scalafix is supported for Scala 3.
       - name: Run linter
         if: startsWith(matrix.scala, '2')
-        run: sbt ++${{ matrix.scala-version }} "scalafixAll --check"
+        run: sbt "++${{ matrix.scala-version }} scalafixCheckAll"
 
       - name: Compile
         run: sbt "++${{ matrix.scala-version }} compile"
@@ -66,7 +66,7 @@ jobs:
       - name: Check mdoc output
         if: matrix.scala == '2.12'
         run: >
-          sbt ++${{ matrix.scala-version }} mdoc &&
+          sbt "++${{ matrix.scala-version }} mdoc" &&
           git diff --exit-code
 
   build_website:

build.sbt

@@ -66,6 +66,9 @@ lazy val sttp = module(project) in file("modules/sttp")
 lazy val yaml = module(project) in file("modules/yaml")
 lazy val `zio-config` = module(project) in file("modules/zio-config")
 
+// Workaround for https://github.com/scalacenter/scalafix/issues/1488
+val scalafixCheckAll = taskKey[Unit]("No-arg alias for 'scalafixAll --check'")
+
 lazy val commonSettings = Seq(
   // format: off
   homepage := Some(url("https://github.com/pureconfig/pureconfig")),
@@ -101,6 +104,7 @@ lazy val commonSettings = Seq(
     case _ => List.empty
   }.value,
   scalafixOnCompile := forScalaVersions { case (2, _) => true; case _ => false }.value,
+  scalafixCheckAll := scalafixAll.toTask(" --check").value,
 
   autoAPIMappings := true,