fix: only require the parameter when building a package

Author: kkostov

.github/workflows/build.yml

@@ -30,4 +30,4 @@ jobs:
 
       - name: Gradle build
         working-directory: ./pretixscan
-        run: ./gradlew :composeApp:build -PappPackageName="pretixSCAN"
+        run: ./gradlew :composeApp:build

pretixscan/composeApp/build.gradle.kts

@@ -155,11 +155,10 @@ compose.desktop {
         nativeDistributions {
             // On Windows, we need the packageName to be set as 'pretixSCAN Desktop' in order to avoid a conflict with v1
 
-            val requiredPackageName = findProperty("appPackageName")?.toString()
-                ?: throw GradleException("Package name must be provided via -PappPackageName=<name>")
+            val packageNameValue = findProperty("appPackageName")?.toString() ?: "pretixSCAN-default"
 
             targetFormats(TargetFormat.Dmg, TargetFormat.Msi, TargetFormat.Deb)
-            packageName = requiredPackageName
+            packageName = packageNameValue
             packageVersion = version
             vendor = "pretix GmbH"
             copyright = "pretix.eu, Raphael Michel"
@@ -193,4 +192,13 @@ compose.desktop {
             }
         }
     }
+}
+
+// Validate packageName is provided for packaging tasks
+tasks.matching { it.name.contains("package", ignoreCase = true) }.configureEach {
+    doFirst {
+        if (findProperty("appPackageName") == null) {
+            throw GradleException("Package name must be provided via -PappPackageName=<name> for packaging tasks")
+        }
+    }
 }