在doFirst中commandLine之后跳过了Gradle任务执行

Question

这是Windows上的构建过程。我有一个gradle任务（类型:Exec)，它使用它的doFirst闭包从外部目录临时复制文件，这是它的构建过程所必需的：

task(myTask, type: Exec) {
    [...]
    < do own stuff >
    [...]

    doFirst {
        println "Copy file"
        if (System.properties['os.name'].toLowerCase().contains('windows')) {
            commandLine 'cmd', '/c', "copy .\\<myFile> .\\..\\.."
        }
    }
}

出于某种原因，使用doFirst中的commandLine来执行复制命令会使整个任务终止，并阻止执行任务的主要目的。

[DEBUG] [org.gradle.process.internal.DefaultExecHandle] Changing state to: STARTING
[DEBUG] [org.gradle.process.internal.DefaultExecHandle] Waiting until process started: command 'cmd'.
[DEBUG] [org.gradle.process.internal.DefaultExecHandle] Changing state to: STARTED
[DEBUG] [org.gradle.process.internal.ExecHandleRunner] waiting until streams are handled...
[INFO] [org.gradle.process.internal.DefaultExecHandle] Successfully started process 'command 'cmd''
[QUIET] [system.out]         1 file(s) copied.
[DEBUG] [org.gradle.process.internal.DefaultExecHandle] Changing state to: SUCCEEDED
[DEBUG] [org.gradle.process.internal.DefaultExecHandle] Process 'command 'cmd'' finished with exit value 0 (state: SUCCEEDED)
[DEBUG] [org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter] Finished executing task 'myTask'

Answer 1

不要使用doFirst闭包中的commandline，而是使用简单的旧copy块：

task(myTask, type: Exec) {
    [...]
    < do own stuff >
    [...]

    doFirst {
        println "Copy file"
        copy {
           from "some file"
           into "some path"
        }
    }
}