gradle - 如何使用 gradle 脚本 Kotlin 构建文件构建可运行的 ShadowJar？

Question

最简单的 Kotlin hello world for gradle script Kotlin：

thufir@dur:~/github/gradleScriptKotlin$ 
thufir@dur:~/github/gradleScriptKotlin$ gradle clean shadowJar;java -jar build/libs/gradleScriptKotlin.jar 

> Task :compileKotlin 
Using Kotlin incremental compilation

> Task :shadowJar 
A problem was found with the configuration of task ':shadowJar'. Registering invalid inputs and outputs via TaskInputs and TaskOutputs methods has been deprecated and is scheduled to be removed in Gradle 5.0.
 - No value has been specified for property 'mainClassName'.
The SimpleWorkResult type has been deprecated and is scheduled to be removed in Gradle 5.0. Please use WorkResults.didWork() instead.


BUILD SUCCESSFUL in 1s
4 actionable tasks: 4 executed
Hello gradle script Kotlin world!
thufir@dur:~/github/gradleScriptKotlin$ 

为简洁起见，请参阅项目本身，它实际上仅由构建文件和 kotlin 脚本组成。

如何使用 gradle 脚本 Kotlin 构建文件构建可运行的 ShadowJar？

Answer 1

你是说胖子吗？如果是这样，您可以使用 shadow gradle 插件：

id 'com.github.johnrengelman.shadow' version '2.0.2'

如果你想让 jar 可执行，你还需要添加到清单中（下面的例子是带有 packageMain-class的文件中的 main 方法）：Applicaion.kttest

jar {
    manifest {
        attributes 'Main-Class': 'test.ApplicationKt'
    }
}

有了这个，你可以jar使用命令运行：java -jar <your jar>

下面我包含了简单的例子。文件build.gradle：

plugins {
    id 'com.github.johnrengelman.shadow' version '2.0.2'
    id "org.jetbrains.kotlin.jvm" version "1.2.21"
}

repositories {
    jcenter()
}

jar {
    manifest {
        attributes 'Main-Class': 'test.ApplicationKt'
    }
}

dependencies {
    compile("org.jetbrains.kotlin:kotlin-stdlib-jdk8")
    compile("org.simpleframework:simple-xml:2.5")
}

文件test.Application.kt：

package test

import org.simpleframework.xml.Element
import org.simpleframework.xml.ElementList
import org.simpleframework.xml.Root
import org.simpleframework.xml.core.Persister

private val testXml = """
<feed>
   <entry>
        <id> someid </id>
        <published> somedate </published>
   </entry>

   <entry>
        <id> someid2 </id>
        <published> somedate2 </published>
   </entry>
</feed>
""".trimIndent()

@Root(name = "feed", strict = false)
data class Feed(
        @field:ElementList(name = "entry", inline = true)
        var entriesList: List<Entry>? = null
)

@Root(name = "entry", strict = true)
data class Entry(
        @field:Element(name = "id")
        var id: String? = null,

        @field:Element(name = "published")
        var published: String? = null
)

fun main(args: Array<String>) {
    println(testXml)

    val serializer = Persister()

    val example = serializer.read(Feed::class.java, testXml)

    println(example)
}

运行命令：gradle shadowJar

在尝试运行 jar 之后：java -jar build/libs/shadow_test-all.jar

2018-02-17 更新

build.gradle.kts文件版本：

import org.jetbrains.kotlin.gradle.dsl.Coroutines
import org.jetbrains.kotlin.gradle.tasks.KotlinCompile

plugins {
    id("org.jetbrains.kotlin.jvm") version "1.2.21"
    id("com.github.johnrengelman.shadow") version "2.0.2"
}

repositories {
    jcenter()
}

tasks.withType<Jar> {
    manifest {
        attributes(mapOf(
                "Main-Class" to "test.ApplicationKt"
        ))
    }
}

dependencies {
    compile("org.jetbrains.kotlin:kotlin-stdlib-jdk8")
    compile("org.simpleframework:simple-xml:2.5")
}