Fix file system watching incompatibility with project cache dir

Explicitly disable org.gradle.vfs.watch in buildpack gradle.properties
to prevent build failures when users have org.gradle.vfs.watch=true
in their project gradle.properties, which is incompatible with
org.gradle.projectcachedir.

Author: Malax

bin/compile

@@ -69,6 +69,10 @@ cat <<-EOF >"${GRADLE_USER_HOME}/gradle.properties"
 	org.gradle.welcome=never
 	org.gradle.caching=true
 	org.gradle.projectcachedir=${CACHE_DIR}/.gradle-project
+	# Disable file system watching because org.gradle.vfs.watch is incompatible with
+	# org.gradle.projectcachedir. This prevents build failures when users have
+	# org.gradle.vfs.watch=true in their project gradle.properties.
+	org.gradle.vfs.watch=false
 EOF
 
 # We're adding custom tasks to support buildpack functionality via a Gradle init script.

test/spec/misc_spec.rb

@@ -179,7 +179,7 @@
     end
   end
 
-  it 'builds successfully with file system watching enabled via gradle.properties' do
+  it 'builds successfully when user enables file system watching via gradle.properties' do
     app = Hatchet::Runner.new('simple-http-service-gradle-8-groovy')
     app.before_deploy do
       File.write('gradle.properties', <<~PROPERTIES)
@@ -190,6 +190,7 @@
 
     app.deploy do
       expect(app).to be_deployed
+      expect(clean_output(app.output)).not_to include('Enabling file system watching via --watch-fs (or via the org.gradle.vfs.watch property) with --project-cache-dir also specified is not supported; remove either option to fix this problem')
     end
   end
 end