gpg release fix (#20)

Author: kperry-godaddy

.github/workflows/release.yml

@@ -55,4 +55,5 @@ jobs:
         env:
           MAVEN_CENTRAL_USERNAME: ${{ secrets.MAVEN_CENTRAL_USERNAME }}
           MAVEN_CENTRAL_PASSWORD: ${{ secrets.MAVEN_CENTRAL_PASSWORD }}
+          GPG_PRIVATE_KEY: ${{ secrets.GPG_PRIVATE_KEY }}
           GPG_PASSPHRASE: ${{ secrets.GPG_PASSPHRASE }}

build.gradle.kts

@@ -143,8 +143,9 @@ subprojects {
                 gradle.taskGraph.hasTask("publishAllPublicationsToMavenCentralRepository")
             })
 
-            // Use GPG command (key imported by actions/setup-java)
-            useGpgCmd()
+            val signingKey = System.getenv("GPG_PRIVATE_KEY")
+            val signingPassword = System.getenv("GPG_PASSPHRASE")
+            useInMemoryPgpKeys(signingKey, signingPassword)
 
             sign(the<PublishingExtension>().publications["mavenJava"])
         }