Gradle plugin for GraalVM Native Image building

graalvmNative {
    binaries {
        main {
            javaLauncher = javaToolchains.launcherFor {
                languageVersion = JavaLanguageVersion.of(8)
                vendor = JvmVendorSpec.matching("GraalVM Community")
            }
        }
    }
}

graalvmNative {
    binaries {
        named("main") {
            javaLauncher.set(javaToolchains.launcherFor {
                languageVersion.set(JavaLanguageVersion.of(8))
                vendor.set(JvmVendorSpec.matching("GraalVM Community"))
            })
        }
    }
}

graalvmNative {
    agent {
        defaultMode = "standard" // Default agent mode if one isn't specified using `-Pagent=mode_name`
        enabled = true // Enables the agent

        modes {
            // The standard agent mode generates metadata without conditions.
            standard {
            }
            // The conditional agent mode generates metadata with conditions.
            conditional {
                userCodeFilterPath = "path-to-filter.json" // Path to a filter file that determines classes which will be used in the metadata conditions.
                extraFilterPath = "path-to-another-filter.json" // Optional, extra filter used to further filter the collected metadata.
            }
            // The direct agent mode allows users to directly pass options to the agent.
            direct {
                // {output_dir} is a special string expanded by the plugin to where the agent files would usually be output.
                options.add("config-output-dir={output_dir}")
                options.add("experimental-configuration-with-origins")
            }
        }

        callerFilterFiles.from("filter.json")
        accessFilterFiles.from("filter.json")
        builtinCallerFilter = true
        builtinHeuristicFilter = true
        enableExperimentalPredefinedClasses = false
        enableExperimentalUnsafeAllocationTracing = false
        trackReflectionMetadata = true

        // Copies metadata collected from tasks into the specified directories.
        metadataCopy {
            inputTaskNames.add("test") // Tasks previously executed with the agent attached.
            outputDirectories.add("src/main/resources/META-INF/native-image")
            mergeWithExisting = true // Instead of copying, merge with existing metadata in the output directories.
        }

        /*
        By default, if `-Pagent` is specified, all tasks that extend JavaForkOptions are instrumented.
        This can be limited to only specific tasks that match this predicate.
         */
        tasksToInstrumentPredicate = t -> true
    }

    binaries {
        main {
            // Main options
            imageName = 'application' // The name of the native image, defaults to the project name
            mainClass = 'org.test.Main' // The main class to use, defaults to the application.mainClass
            debug = true // Determines if debug info should be generated, defaults to false
            verbose = true // Add verbose output, defaults to false
            fallback = true // Sets the fallback mode of native-image, defaults to false
            sharedLibrary = false // Determines if image is a shared library, defaults to false if `java-library` plugin isn't included
            quickBuild = false // Determines if image is being built in quick build mode (alternatively use GRAALVM_QUICK_BUILD environment variable)
            richOutput = false // Determines if native-image building should be done with rich output

            systemProperties = [name1: 'value1', name2: 'value2'] // Sets the system properties to use for the native image builder
            configurationFileDirectories.from(file('src/my-config')) // Adds a native image configuration file directory, containing files like reflection configuration
            excludeConfig.put("org.example.test", ["META-INF/native-image/*", "config/*"]) // Excludes configuration that matches one of given regexes from JAR of dependency with said coordinates.
            excludeConfig.put(file("path/to/artifact.jar"), listOf("META-INF/native-image/*", "config/*"))

            // Advanced options
            buildArgs.add('-H:Extra') // Passes '-H:Extra' to the native image builder options. This can be used to pass parameters which are not directly supported by this extension
            jvmArgs.add('flag') // Passes 'flag' directly to the JVM running the native image builder

            // Runtime options
            runtimeArgs.add('--help') // Passes '--help' to built image, during "nativeRun" task

            useFatJar = true // Instead of passing each jar individually, builds a fat jar
        }
    }
}

graalvmNative {
    agent {
        defaultMode.set("standard") // Default agent mode if one isn't specified using `-Pagent=mode_name`
        enabled.set(true) // Enables the agent

        modes {
            // The standard agent mode generates metadata without conditions.
            standard {
            }
            // The conditional agent mode generates metadata with conditions.
            conditional {
                userCodeFilterPath.set("path-to-filter.json") // Path to a filter file that determines classes which will be used in the metadata conditions.
                extraFilterPath.set("path-to-another-filter.json") // Optional, extra filter used to further filter the collected metadata.
            }
            // The direct agent mode allows users to directly pass options to the agent.
            direct {
                // {output_dir} is a special string expanded by the plugin to where the agent files would usually be output.
                options.add("config-output-dir={output_dir}")
                options.add("experimental-configuration-with-origins")
            }
        }

        callerFilterFiles.from("filter.json")
        accessFilterFiles.from("filter.json")
        builtinCallerFilter.set(true)
        builtinHeuristicFilter.set(true)
        enableExperimentalPredefinedClasses.set(false)
        enableExperimentalUnsafeAllocationTracing.set(false)
        trackReflectionMetadata.set(true)

        // Copies metadata collected from tasks into the specified directories.
        metadataCopy {
            inputTaskNames.add("test") // Tasks previously executed with the agent attached.
            outputDirectories.add("src/main/resources/META-INF/native-image")
            mergeWithExisting.set(true) // Instead of copying, merge with existing metadata in the output directories.
        }

        /*
        By default, if `-Pagent` is specified, all tasks that extend JavaForkOptions are instrumented.
        This can be limited to only specific tasks that match this predicate.
         */
        tasksToInstrumentPredicate.set(t -> true)
    }

    binaries {
        named("main") {
            // Main options
            imageName.set("application") // The name of the native image, defaults to the project name
            mainClass.set("org.test.Main") // The main class to use, defaults to the application.mainClass
            debug.set(true) // Determines if debug info should be generated, defaults to false
            verbose.set(true) // Add verbose output, defaults to false
            fallback.set(true) // Sets the fallback mode of native-image, defaults to false
            sharedLibrary.set(false) // Determines if image is a shared library, defaults to false if `java-library` plugin isn't included
            quickBuild.set(false) // Determines if image is being built in quick build mode (alternatively use GRAALVM_QUICK_BUILD environment variable)
            richOutput.set(false) // Determines if native-image building should be done with rich output

            systemProperties.putAll(mapOf("name1" to "value1", "name2" to "value2")) // Sets the system properties to use for the native image builder
            configurationFileDirectories.from(file("src/my-config")) // Adds a native image configuration file directory, containing files like reflection configuration
            excludeConfig.put("org.example.test", listOf("META-INF/native-image/*", "config/*")) // Excludes configuration that matches one of given regexes from JAR of dependency with said coordinates.
            excludeConfig.put(file("path/to/artifact.jar"), listOf("META-INF/native-image/*", "config/*"))

            // Advanced options
            buildArgs.add("-H:Extra") // Passes '-H:Extra' to the native image builder options. This can be used to pass parameters which are not directly supported by this extension
            jvmArgs.add("flag") // Passes 'flag' directly to the JVM running the native image builder

            // Runtime options
            runtimeArgs.add("--help") // Passes '--help' to built image, during "nativeRun" task

            useFatJar.set(true) // Instead of passing each jar individually, builds a fat jar
        }
    }
}

graalvmNative {
    useArgFile = false // required for older GraalVM releases
    binaries {
        main {
            useFatJar = true
        }
    }
}

graalvmNative {
    useFatJar.set(false) // required for older GraalVM releases
    binaries {
        named("main") {
            useFatJar.set(true)
        }
    }
}

tasks.named("nativeCompile") {
    classpathJar = myFatJar
}

tasks.named<BuildNativeImageTask>("nativeCompile") {
    classpathJar.set(myFatJar.flatMap { it.archiveFile })
}