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$

为了简洁起见，请参考 project itself，它实际上只包含构建文件和一个 kotlin 脚本。

Answer 1

你是说 fatjar 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 Main-class 到清单（下面是文件 Applicaion.kt 中的主要方法示例，包 test）：

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

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

下面我有一个简单的例子。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

然后尝试运行罐子：java -jar build/libs/shadow_test-all.jar

更新2018-02-17

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")
}

Answer 2

以上答案使用的是非常旧的版本，对于较新的版本：

添加插件：

id("com.github.johnrengelman.shadow") version "6.1.0"

指定主要class:

application {
    mainClassName = "com.pkg.MainClassKt"
}

最后，指定 shadowJar 任务：

tasks {
    named<ShadowJar>("shadowJar") {
        archiveBaseName.set("jarFileNmae")
    }
}

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

How to build a runnable ShadowJar with a gradle script Kotlin build file?

gradle

build

kotlin

build.gradle

gradle-kotlin-dsl