build: simplify CI_SINGLE_BUILD by writing to file instead of conditional in gradle

Author: isXander

.github/workflows/build.yml

@@ -51,6 +51,8 @@ jobs:
         uses: gradle/actions/setup-gradle@v3
         with:
           cache-read-only: false
+      - name: Set active version
+        run: printf "${{ matrix.target }}" > ./versions/current
       - name: Build ${{ matrix.target }}
         run: ./gradlew "Refresh active project" buildAndCollectActive --stacktrace
         env:

stonecutter.gradle.kts

@@ -11,12 +11,7 @@ plugins {
     id("dev.isxander.modstitch.base") apply false
 }
 
-val ciSingleBuild: String? = System.getenv("CI_SINGLE_BUILD")
-if (ciSingleBuild != null) {
-    stonecutter active ciSingleBuild.split(":")[0]
-} else {
-    stonecutter active file("versions/current")
-}
+stonecutter active file("versions/current")
 
 stonecutter.tree.nodes.forEach { it.project.plugins.apply("dev.kikugie.stonecutter") }