[GR-40466] Add --enable-preview shortcut to Native Image.

docs/reference-manual/native-image/BuildOptions.md

@@ -26,6 +26,7 @@ The following options are supported across both GraalVM Community and Enterprise
 * `--enable-all-security-services`: add all security service classes to a native executable
 * `--enable-http`: enable HTTP support in a native executable
 * `--enable-https`: enable HTTPS support in a native executable
+* `--enable-preview`: allow classes to depend on preview features of this release
 * `--enable-url-protocols`: list comma-separated URL protocols to enable
 * `--features`: a comma-separated list of fully qualified [Feature implementation classes](https://www.graalvm.org/sdk/javadoc/index.html?org/graalvm/nativeimage/hosted/Feature.html)
 * `--force-fallback`: force building of a fallback native executable

substratevm/CHANGELOG.md

@@ -8,7 +8,7 @@ This changelog summarizes major changes to GraalVM Native Image.
 * (GR-39497) Add `-H:BuildOutputJSONFile=<file.json>` option for [JSON build output](https://github.com/oracle/graal/edit/master/docs/reference-manual/native-image/BuildOutput.md#machine-readable-build-output). Please feel free to provide feedback so that we can stabilize the schema/API.
 * (GR-40170) Add `--silent` option to silence the build output.
 * (GR-39475) Add initial support for jvmstat.
-* (GR-39563) Add support for JDK 19 and Project Loom Virtual Threads (JEP 425) for high-throughput lightweight concurrency. Enable on JDK 19 with `native-image -J--enable-preview`.
+* (GR-39563) Add support for JDK 19 and Project Loom Virtual Threads (JEP 425) for high-throughput lightweight concurrency. Enable on JDK 19 with `native-image --enable-preview`.
 
 ## Version 22.2.0
 * (GR-20653) Re-enable the usage of all CPU features for JIT compilation on AMD64.

substratevm/src/com.oracle.svm.core/src/com/oracle/svm/core/thread/ContinuationsFeature.java

@@ -61,7 +61,7 @@ public void afterRegistration(AfterRegistrationAccess access) {
              * field, and unparking a virtual thread in additionalMonitorsLock.unlock causes a
              * deadlock between carrier thread and virtual thread. 17 uses a ReentrantLock.
              */
-            throw UserError.abort("Continuations are currently supported only on JDK 17 with option %s, or on JDK 19 with preview features enabled (-J--enable-preview).",
+            throw UserError.abort("Continuations are currently supported only on JDK 17 with option %s, or on JDK 19 with preview features enabled (--enable-preview).",
                             SubstrateOptionsParser.commandArgument(SubstrateOptions.SupportContinuations, "+"));
         }
     }

substratevm/src/com.oracle.svm.driver/resources/Help.txt

@@ -31,6 +31,7 @@ where options include:
     -J<flag>              pass <flag> directly to the JVM running the image generator
     -O<level>             0 - no optimizations, 1 - basic optimizations (default).
     --diagnostics-mode    enable diagnostics output: class initialization, substitutions, etc.
+    --enable-preview      allow classes to depend on preview features of this release
     --verbose             enable verbose output
     --version             print product version and exit
     --help                print this help message

substratevm/src/com.oracle.svm.driver/src/com/oracle/svm/driver/DefaultOptionHandler.java

@@ -124,6 +124,10 @@ public boolean consume(ArgumentQueue args) {
                 args.poll();
                 NativeImage.showWarning("Ignoring server-mode native-image argument " + headArg + ".");
                 return true;
+            case "--enable-preview":
+                args.poll();
+                nativeImage.addCustomJavaArgs("--enable-preview");
+                return true;
         }
 
         String singleArgClasspathPrefix = newStyleClasspathOptionName + "=";