为什么我不能在preReleaseBuild任务上设置任务依赖项，但是preBuild任务可以工作？

Question

如何设置这两个任务的依赖关系？preReleaseBuild和preDebugBuild

我想做以下几点：

preReleaseBuild.dependsOn switchToRelease
preDebugBuild.dependsOn switchToDebug

但我知道这个错误：

Error:(251, 0) Could not find property 'preReleaseBuild' on project ':app'.

这两个任务显然存在，因为我在运行gradle assembleRelease时会看到它们

Zaks-MBP:androidapp zak$ gradle assembleRelease
Parallel execution is an incubating feature.
:analytics:compileJava
:app:gce2retrofit-release
:feed:compileJava
:gcm:compileJava
:backend:processResources UP-TO-DATE
:app:gce2retrofit-release UP-TO-DATE
:app:preBuild UP-TO-DATE
:app:preReleaseBuild UP-TO-DATE
:app:checkReleaseManifest
:app:preDebugBuild UP-TO-DATE

Answer 1

需要使用afterEvaluate

afterEvaluate {
    preReleaseBuild.dependsOn switchToRelease
    preDebugBuild.dependsOn switchToDebug
}