--- /dev/null	2019-11-18 20:58:50.000000000 -0500
+++ new/src/jdk.incubator.jpackage/share/classes/jdk/incubator/jpackage/internal/ScriptRunner.java	2019-11-18 20:58:46.794775400 -0500
@@ -0,0 +1,119 @@
+/*
+ * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.incubator.jpackage.internal;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Optional;
+import static jdk.incubator.jpackage.internal.OverridableResource.createResource;
+import static jdk.incubator.jpackage.internal.StandardBundlerParam.APP_NAME;
+import static jdk.incubator.jpackage.internal.StandardBundlerParam.CONFIG_ROOT;
+
+/**
+ * Runs custom script from resource directory.
+ */
+class ScriptRunner {
+    ScriptRunner() {
+        environment = new ProcessBuilder().environment();
+    }
+
+    ScriptRunner setResourceCategoryId(String v) {
+        resourceCategoryId = v;
+        return this;
+    }
+
+    ScriptRunner setDirectory(Path v) {
+        directory = v;
+        return this;
+    }
+
+    ScriptRunner setScriptNameSuffix(String v) {
+        scriptNameSuffix = v;
+        return this;
+    }
+
+    ScriptRunner addEnvironment(Map<String, String> v) {
+        environment.putAll(v);
+        return this;
+    }
+
+    ScriptRunner setEnvironmentVariable(String envVarName, String envVarValue) {
+        Objects.requireNonNull(envVarName);
+        if (envVarValue == null) {
+            environment.remove(envVarName);
+        } else {
+            environment.put(envVarName, envVarValue);
+        }
+        return this;
+    }
+
+    public void run(Map<String, ? super Object> params) throws IOException {
+        String scriptName = String.format("%s-%s%s", APP_NAME.fetchFrom(params),
+                scriptNameSuffix, scriptSuffix());
+        Path scriptPath = CONFIG_ROOT.fetchFrom(params).toPath().resolve(
+                scriptName);
+        createResource(null, params)
+                .setCategory(I18N.getString(resourceCategoryId))
+                .saveToFile(scriptPath);
+        if (!Files.exists(scriptPath)) {
+            return;
+        }
+
+        ProcessBuilder pb = new ProcessBuilder(shell(),
+                scriptPath.toAbsolutePath().toString());
+        Map<String, String> workEnvironment = pb.environment();
+        workEnvironment.clear();
+        workEnvironment.putAll(environment);
+
+        if (directory != null) {
+            pb.directory(directory.toFile());
+        }
+
+        Executor.of(pb).executeExpectSuccess();
+    }
+
+    private static String shell() {
+        if (Platform.isWindows()) {
+            return "cscript";
+        }
+        return Optional.ofNullable(System.getenv("SHELL")).orElseGet(() -> "sh");
+    }
+
+    private static String scriptSuffix() {
+        if (Platform.isWindows()) {
+            return ".wsf";
+        }
+        return ".sh";
+    }
+
+    private String scriptNameSuffix;
+    private String resourceCategoryId;
+    private Path directory;
+    private Map<String, String> environment;
+}