Spring Boot 使用 1.5.6 发布重新打包的子模块 jar

Question

我们已将 maven 多模块项目转换为 gradle，但在发布 spring boot jar 时遇到了问题。

设置是这样的

root
|- module1
|- common
|- common-test
|- module2-common
|- module2-write
|- module3-common
|- module3-write
|- module4
|- module5
|- deploy

deploy 包含重新打包的 jar。

发布（使用 maven-publish）时，工件只有几千字节大。显然它实际上并没有发布deploy jar。

部署build.gradle.kts

import org.flywaydb.gradle.task.FlywayMigrateTask
import org.springframework.boot.gradle.repackage.RepackageTask
import org.springframework.boot.gradle.run.BootRunTask

plugins {
    kotlin("jvm")
    id("org.springframework.boot") version ("1.5.6.RELEASE")
    id("io.spring.dependency-management") version("1.0.6.RELEASE")
    id("org.flywaydb.flyway")
    java
}

tasks {
    withType<Jar> {
        baseName = project.name
        version = project.version as String
    }

    val implementation = configurations.getByName("implementation")
    configurations.create("includeAllJars") {
        this.extendsFrom(implementation)
    }
    withType<RepackageTask> {
        this.setCustomConfiguration("includeAllJars")
//        this.classifier = "exec"
    }
}

根build.gradle.kts

plugins {
    base
    java
    idea
    kotlin("jvm") version "1.2.51"
    kotlin("plugin.jpa") version ("1.2.51")
    kotlin("plugin.spring") version ("1.2.51")
    id("nebula.maven-publish") version "8.1.0"
    ...
}

allprojects {
    group = "com.company.group"

    ext {
        set("springBootVersion", "1.5.6.RELEASE")
    }
    apply {
        plugin("org.jetbrains.kotlin.jvm")
        plugin("org.jetbrains.kotlin.plugin.jpa")
        plugin("org.jetbrains.kotlin.plugin.spring")
    }
    dependencies {
        implementation(kotlin("stdlib-jdk8"))
        implementation(kotlin("reflect"))
        implementation(platform("org.springframework.boot:spring-boot-dependencies:${extra["springBootVersion"]}"))
        ...
    }
}

val sourcesJar by tasks.registering(Jar::class) {
    classifier = "sources"
    from(sourceSets["main"].allSource)
}

publishing {
    publications {
        register("maven", MavenPublication::class) {
//            from(project(":server-deploy").components["java"])
//            artifact(sourcesJar.get())
//            artifact(file("deploy/build/docker/runnable.jar"))
        }
    }
    repositories {
        ...
    }
}

对于出版物部分，我尝试指定 from(components["java"])、artifact(file("deploy/build/libs/deploy-${project.version}.jar")) 和以上选项。所有结果都导致发布的 jar 文件只有 1-3KB 大。

我已尝试将发布块移动到部署 build.gradle.kts，但这会导致此错误

* What went wrong:
Execution failed for task ':deploy:publishMavenPublicationToMavenLocal'.
> Failed to publish publication 'maven' to repository 'mavenLocal'
   > Invalid publication 'maven': POM file is invalid. Check any modifications you have made to the POM file.

The Spring Boot docs for the gradle plugin 似乎没有列出任何关于此的内容。

Answer 1

关于 Wilkinson 先生的评论，他认为 Spring Boot 似乎不支持 Gradle 5 是完全正确的。解决方案是在包含 spring boot 插件的一个模块中不使用platform()，而是使用platform()其他地方。这不是一个长期的解决方案！这在我们的例子中是完美的，因为我们直接从 Maven 过渡到 Gradle，然后立即从 Spring Boot 1 过渡到 Spring Boot 2。

deploy/build.gradle.kts

plugins {
    id("org.springframework.boot") version ("1.5.6.RELEASE")
    id("io.spring.dependency-management") version("1.0.6.RELEASE")
    id("nebula.maven-publish")
    java
    …
}
dependencyManagement {
    imports { mavenBom("org.springframework.boot:spring-boot-dependencies:${extra["springBootVersion"]}") }
}

除deploy 和root 之外的所有其他build.gradle.kts

dependencies {
    implementation(platform("org.springframework.boot:spring-boot-dependencies:${extra["springBootVersion"]}"))
    …
}