Use gpg-agent for signing

Author: kl

plugin/build.gradle.kts

@@ -26,14 +26,28 @@ gradlePlugin {
     }
 }
 
-signing { setRequired { gradle.taskGraph.hasTask(":plugin:publishPlugins") } }
+signing { useGpgCmd() }
 
 ktfmt {
     kotlinLangStyle()
     maxWidth.set(100)
     removeUnusedImports.set(true)
 }
 
+val codeSigningEnabled =
+    providers
+        .gradleProperty("mullvad.rust-android-gradle.codeSigningEnabled")
+        .map { it.toBoolean() }
+        .orElse(false)
+
+tasks.withType<Sign>().configureEach {
+    val signingEnabledProvider = codeSigningEnabled
+
+    onlyIf("signing is enabled") {
+        signingEnabledProvider.get()
+    }
+}
+
 val versionProperties =
     Properties().apply { load(FileInputStream("${rootProject.projectDir}/version.properties")) }