Fix handling of paths containing spaces (#99)

Co-authored-by: Jendrik Johannes <jendrik@onepiece.software>

Author: koppor

src/main/java/org/gradlex/javamodule/packaging/tasks/Jpackage.java

@@ -276,7 +276,7 @@ private void configureJPackageArguments(ExecSpec e, Directory resourcesDir) {
     private String createArgsFile(String modulePathAsPath) {
         Path argsFile = getTemporaryDir().toPath().resolve("args.txt");
         List<String> lines = new ArrayList<>(1);
-        lines.add("--module-path " + modulePathAsPath);
+        lines.add("--module-path \"" + modulePathAsPath.replace('\\', '/') + "\"");
         try {
             Files.write(argsFile, lines);
         } catch (IOException e) {

src/test/java/org/gradlex/javamodule/packaging/test/JavaModulePackagingOptionsTest.java

@@ -189,4 +189,20 @@ void can_build_package_in_one_step() {
         assertThat(build.appImageFolder().getAsPath())
                 .isDirectoryNotContaining(f -> f.toFile().isDirectory());
     }
+
+    @Test
+    void works_if_module_path_contains_spaces() {
+        var lib2BuildFile = build.file("lib 2 with spaces/build.gradle.kts");
+        var lib2ModuleInfoFile = build.file("lib 2 with spaces/src/main/java/module-info.java");
+
+        build.settingsFile.appendText("""
+                include(":lib2")
+                project(":lib2").projectDir = file("lib 2 with spaces")
+                """);
+        build.appBuildFile.appendText("dependencies { implementation(project(\":lib2\")) }");
+        lib2BuildFile.writeText("plugins { id(\"java-library\") }");
+        lib2ModuleInfoFile.writeText("module org.example.libtwo { }");
+
+        build.build(":app:jpackage");
+    }
 }