Throw error when provisioning.file is provided but not found (#1340)

* Throw error when provisioning.file is provided but not found.

Author: tresf

ant/project.properties

@@ -52,7 +52,7 @@ javafx.version=19_monocle
 javafx.mirror=https://download2.gluonhq.com/openjfx
 
 # Provisioning
-provision.file=${basedir}/provision.json
+# provision.file=${basedir}/provision.json
 provision.dir=${dist.dir}/provision
 
 # Mask tray toggle (Apple only)

build.xml

@@ -281,13 +281,11 @@
         <echo level="warn">The "include-assets" task is deprecated, please use "build-demo" instead.</echo>
     </target>
 
-    <target name="check-provision">
+    <target name="check-provision" if="provision.file">
+        <property description="suppress property warning" name="provision.file" value=""/>
         <available file="${provision.file}" property="provision.file.exists"/>
-        <condition property="provision.message" value="Found provision file '${provision.file}' calling 'provision --json [...]'">
-            <isset property="provision.file.exists"/>
-        </condition>
-        <property description="Fallback value" name="provision.message" value="Skipping provisioning, '${provision.file}' does not exist."/>
-        <echo level="info">${provision.message}</echo>
+        <fail message="Provision file was provided but not found: '${provision.file}'" unless="provision.file.exists"/>
+        <echo level="info">Found provision file '${provision.file}' calling 'provision --json [...]'</echo>
     </target>
 
     <target name="clean-provision" depends="check-provision" unless="skip.clean.provision">