Question

我有简单的build.gradle（或任何build.gradle，其任务包含println）

println GradleVersion.current().prettyPrint()

task task1{
    println 'task1 starting'
}

现在，当我运行$ gradle build时，我总是看到正在执行的任务或打印输出

task1 starting
:compileJava UP-TO-DATE
:processResources UP-TO-DATE
:classes UP-TO-DATE
:jar
:assemble
:compileTestJava UP-TO-DATE
:processTestResources UP-TO-DATE
:testClasses UP-TO-DATE
:test UP-TO-DATE
:check UP-TO-DATE
:build

BUILD SUCCESSFUL

Total time: 1.291 secs

为什么println内部的任务总是有输出？

Answer 1

如果您有以下代码：

task task1 {
    println 'task1 starting'
}

您处于任务的配置阶段。此阶段在脚本评估期间运行。如果您想在执行任务时打印某些内容您需要为任务添加操作。

看起来像：

task task1 << {
   println 'task1 action'
}

在运行任务时将评估此段代码。 <<与在Task对象上调用doLast方法完全相同。您可以添加许多操作。

Answer 2

第55章

。构建生命周期http://www.gradle.org/docs/current/userguide/build_lifecycle.html

// in `settings.gradle`
// println 'This is executed during the initialization phase.'

println 'This is executed during the configuration phase.'

task configure {
    println 'This is also executed during the configuration phase.'
}

task execute << {
    println 'This is executed during the execution phase.'
}

使用gradle help

运行

输出：

This is executed during the initialization phase.
This is executed during the configuration phase.
This is also executed during the configuration phase.
:help

Welcome to Gradle 1.10.

To run a build, run gradle <task> ...

To see a list of available tasks, run gradle tasks

To see a list of command-line options, run gradle --help

BUILD SUCCESSFUL

Total time: 1.882 secs

Gradle总是从任何任务中打印出来

2 个答案: