Use new GitHub Actions API for setting output

gradle/publishing.gradle

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019-2022 VMware Inc. or its affiliates, All Rights Reserved.
+ * Copyright (c) 2019-2023 VMware Inc. or its affiliates, All Rights Reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -29,6 +29,24 @@ static def qualifyVersion(String v) {
 	return "BAD"
 }
 
+static def outputToGha(String versionType, String fullVersion) {
+	def ghaFilename = System.getenv("GITHUB_OUTPUT")
+	if (ghaFilename == null) {
+		println "::set-output name=versionType::$versionType"
+		println "::set-output name=fullVersion::$fullVersion"
+	}
+	else {
+		println "using GITHUB_OUTPUT file"
+		def ghaFile = new File(ghaFilename)
+		ghaFile.withWriterAppend {
+			it.newLine()
+			it.append("versionType=$versionType")
+			it.newLine()
+			it.append("fullVersion=$fullVersion")
+		}
+	}
+}
+
 configure(rootProject) { subproject ->
 
 	apply plugin: 'maven-publish'
@@ -59,13 +77,18 @@ configure(rootProject) { subproject ->
 	task qualifyVersionGha() {
 		doLast {
 			def versionType = qualifyVersion("$version")
-
-			println "::set-output name=versionType::$versionType"
-			println "::set-output name=fullVersion::$version"
+			//we ensure that if at least _one_ submodule version is BAD, we only output versionType=BAD + job fails
 			if (versionType == "BAD") {
+				outputToGha(versionType, version)
 				println "::error ::Unable to parse $version to a VersionNumber with recognizable qualifier"
 				throw new TaskExecutionException(tasks.getByName("qualifyVersionGha"), new IllegalArgumentException("Unable to parse $version to a VersionNumber with recognizable qualifier"))
 			}
+			println "Recognized $version as $versionType"
+
+			//only output the versionType and fullVersion for the main artifact
+			if (project.name == 'reactor-kotlin-extensions') {
+				outputToGha(versionType, version)
+			}
 		}
 	}