Added GraalVM configuration to create a native binary (#452)

* Initial GraalVM configuration

* graalvm reflection changes for v0.7.4

* graalvm removed unneeded options for native-image

* updated gradle plugin org.mikeneck.graalvm-native-image to 1.1.0

* moved from gradle graalvm-native-image plugin to native-build.sh

* added missing graalvm reflection config for receive

* refactored native-build.sh to a gradle task buildNativeBinary

README.md

@@ -83,6 +83,20 @@ dependencies. If you have a recent gradle version installed, you can replace `./
 
         ./gradlew distTar
 
+### Building a native binary with GraalVM
+
+It is possible to build a native binary with [GraalVM](https://www.graalvm.org).
+
+1. [Install GraalVM and setup the enviroment](https://www.graalvm.org/docs/getting-started/#install-graalvm)
+2. [Install prerequisites](https://www.graalvm.org/reference-manual/native-image/#prerequisites)
+2. Execute Gradle:
+
+        ./gradle nativeImage
+  
+   The binary is available at
+
+        build/native-image/signal-cli
+
 ## Troubleshooting
 If you use a version of the Oracle JRE and get an InvalidKeyException you need to enable unlimited strength crypto. See https://stackoverflow.com/questions/6481627/java-security-illegal-key-size-or-default-parameters for instructions.
 

build.gradle

@@ -74,3 +74,39 @@ task checkLibVersions {
         }
     }
 }
+
+task buildNativeBinary {
+    dependsOn("build")
+    doLast {
+        def graalVMHome = System.getenv("GRAALVM_HOME")
+        if (!graalVMHome) {
+            throw new GradleException('Required GRAALVM_HOME environment variable not set.')
+        }
+        def nativeBinaryOutputPath = "$buildDir/native-image"
+        def nativeBinaryName = "signal-cli"
+
+        mkdir nativeBinaryOutputPath
+
+        exec {
+            workingDir "."
+            commandLine "$graalVMHome/bin/native-image",
+                        "-H:Path=$nativeBinaryOutputPath",
+                        "-H:Name=$nativeBinaryName",
+                        "-H:JNIConfigurationFiles=",
+                        "-H:DynamicProxyConfigurationFiles=",
+                        "-H:ReflectionConfigurationFiles=",
+                        "-H:ResourceConfigurationFiles=",
+                        "--no-fallback",
+                        "--allow-incomplete-classpath",
+                        "--report-unsupported-elements-at-runtime",
+                        "--enable-url-protocols=http,https",
+                        "--enable-https",
+                        "--enable-all-security-services",
+                        "-H:ResourceConfigurationFiles=graalvm-config-dir/resource-config.json",
+                        "-H:ReflectionConfigurationFiles=graalvm-config-dir/reflect-config.json",
+                        "-cp",
+                        sourceSets.main.runtimeClasspath.asPath,
+                        project.mainClassName
+        }
+    }
+}

graalvm-config-dir/resource-config.json

@@ -0,0 +1,11 @@
+{
+  "resources":{
+  "includes":[
+    {"pattern":"com/google/i18n/phonenumbers/data/.*"}, 
+    {"pattern":"libzkgroup.so"},
+    {"pattern":"org/asamk/signal/manager/ias.store"}, 
+    {"pattern":"org/asamk/signal/manager/whisper.store"}, 
+    {"pattern":"org/slf4j/impl/StaticLoggerBinder.class"}
+  ]},
+  "bundles":[{"name":"net.sourceforge.argparse4j.internal.ArgumentParserImpl"}]
+}