java - 如何在某些情况下跳过 bmuschko/gradle-docker-plugin 引入的 gradle 任务？

Question

我使用gradle插件bmuschko/gradle-docker-plugin将 docker 与 gradle 集成。我在 build.gradle 文件中创建一些任务:

    task copyJar(type: Copy) {
    dependsOn build

    from project.file("$project.buildDir/libs/" << jarName)
    into project.file("$project.buildDir/docker")
}

task createDockerfile(type: Dockerfile) {
    dependsOn copyJar

    // Generate Dockerfile
}

task buildDockerImage(type: DockerBuildImage) {
    dependsOn createDockerfile

    inputDir = createDockerfile.destFile.parentFile
    tag = 'example.com/' << jar.baseName
    if (project.hasProperty('imageTag')) {
        tag += ':' << imageTag
    }
}
task pushDockerImage(type: DockerPushImage) {
    dependsOn buildDockerImage
    conventionMapping.imageName = { 'example.com/' + jar.baseName }
    if (project.hasProperty('imageTag')) {
        conventionMapping.tag = { imageTag }
    }
}

我想要的是当我运行gradle pushDockerImage时，如果源代码没有更改，则可以跳过此任务。但是，现在每次我运行 gradle pushDockerImage ，它会被执行并持续很长时间，将镜像推送到docker注册表。

我还运行gradle --info pushDockerImage两次，第二次gradle显示以下信息:

Skipping task ':core/sample:buildDockerImage' as task onlyIf is false.
:core/sample:buildDockerImage SKIPPED
:core/sample:buildDockerImage (Thread[main,5,main]) completed. Took     1.765 secs.
:core/sample:pushDockerImage (Thread[main,5,main]) started.
:core/sample:pushDockerImage
Executing task ':core/sample:pushDockerImage' (up-to-date check took 0.001 secs) due to:
    Task has not declared any outputs.

所以这里buildDockerImage被跳过，但是 pushDockerImage不是。我怎样才能跳过它？

Answer 1

我认为您需要在任务 copyJar 上声明创建的图像作为 pushDockerImage 任务的输入。像这样的东西:

task pushDockerImage(type: DockerPushImage) {
    dependsOn buildDockerImage
    inputs.file project.file("$project.buildDir/docker")
    ...

请参阅 gradle 用户指南第 17.9 段:https://docs.gradle.org/current/userguide/more_about_tasks.html了解详情