Remove use of deprecated 'set-output' command

- Use GITHUB_OUTPUT file in init script
- Write to a marker file in configuratiion-cache tests

Fixes #461

.github/workflow-samples/groovy-dsl/build.gradle

@@ -11,8 +11,8 @@ dependencies {
 }
 
 tasks.named("test").configure {
-    // Echo an output value so we can detect configuration-cache usage
-    println "::set-output name=task_configured::yes"
+    // Write marker file so we can detect if task was configured
+    file("task-configured.txt").text = "true"
 
     doLast {
         if (System.properties.verifyCachedBuild) {

.github/workflow-samples/kotlin-dsl/build.gradle.kts

@@ -18,8 +18,8 @@ tasks.test {
 }
 
 tasks.named("test").configure {
-    // Echo an output value so we can detect configuration-cache usage
-    println("::set-output name=task_configured::yes")
+    // Write marker file so we can detect if task was configured
+    file("task-configured.txt").writeText("true")
 
     doLast {
         if (System.getProperties().containsKey("verifyCachedBuild")) {

.github/workflows/integ-test-restore-configuration-cache.yml

@@ -60,11 +60,13 @@ jobs:
       working-directory: .github/workflow-samples/groovy-dsl
       run: ./gradlew test --configuration-cache
     - name: Check that configuration-cache was used
-      if: ${{ steps.execute.outputs.task_configured == 'yes' }}
       uses: actions/github-script@v6
       with:
         script: |
-          core.setFailed('Configuration cache was not used - task was configured unexpectedly')
+          const fs = require('fs')
+          if (fs.existsSync('.github/workflow-samples/groovy-dsl/task-configured.txt')) {
+            core.setFailed('Configuration cache was not used - task was configured unexpectedly')
+          }
 
   # Check that the build can run when no extracted cache entries are restored
   gradle-user-home-not-fully-restored:
@@ -154,9 +156,11 @@ jobs:
       working-directory: .github/workflow-samples/kotlin-dsl
       run: ./gradlew test --configuration-cache
     - name: Check that configuration-cache was used
-      if: ${{ steps.execute.outputs.task_configured == 'yes' }}
       uses: actions/github-script@v6
       with:
         script: |
-          core.setFailed('Configuration cache was not used - task was configured unexpectedly')
+          const fs = require('fs')
+          if (fs.existsSync('.github/workflow-samples/kotlin-dsl/task-configured.txt')) {
+            core.setFailed('Configuration cache was not used - task was configured unexpectedly')
+          }
 

src/resources/init-scripts/build-result-capture.init.gradle

@@ -51,7 +51,10 @@ def captureUsingBuildScanPublished(buildScanExtension, rootProject, invocationId
             buildResults.setBuildScanUri(buildScan.buildScanUri.toASCIIString())
             buildResults.writeToResultsFile(true)
 
-            println("::set-output name=build-scan-url::${buildScan.buildScanUri}")
+            def githubOutput = System.getenv("GITHUB_OUTPUT")
+            if (githubOutput) {
+                new File(githubOutput) << "build-scan-url=${buildScan.buildScanUri}\n"
+            }
         }
 
         onError { error ->