我有一些用groovy编写的Git助手:
git.gradle:
def gitHash() {
def res = 'git rev-parse --short HEAD'.execute([], project.rootDir).text.trim()
def diff = 'git diff'.execute([], project.rootDir).text.trim()
if (diff != null && diff.length() > 0) {
res += "-dirty"
}
return res
}
// method needs to be converted to closure, in order to be visible outside of script
ext.gitHash = { return gitHash();}
现在我将整个东西转换成Kotlin,现在看起来像这样:
git.gradle.kts:
import java.io.IOException
import java.util.concurrent.TimeUnit
fun gitHash() : String {
var res = "git rev-parse --short HEAD".runCommand(project.rootDir)?.trim()
val diff = "git diff".runCommand(project.rootDir)?.trim()
if (diff != null && diff.isNotEmpty()) {
res += "-dirty"
}
return res!!
}
fun String.runCommand(workingDir: File): String? {
...
}
// method needs to be converted to closure, in order to be visible outside of script
//ext.gitHash = { return gitHash();} // <-- HERE'S THE PROBLEM
task("gitTask") { // <-- calling ./gradlew gitTask works
println(gitHash())
}
主脚本包括以下内容:
//apply from: 'git.gradle'
apply from: 'git.gradle.kts'
println gitHash() // works with Groovy, doesn't with Kotlin
现在,问题是,主脚本无法识别gitHash()方法,很可能是因为我无法通过ext闭包暴露它 . 与Groovy脚本相同,此方法似乎是该文件中的私有(或本地) .
据我所知,ext closure是我试图整合的'project.extra'的简写 . 而且,似乎典型的Groovy闭包在Kotlin中没有等价物 . 我卡在这里,不知道我还能尝试什么 . 任何想法欢迎 .
UPDATE
附:
var gitHash: Closure<Any?> by extra
gitHash = closureOf<String> { }
gitHash.delegate = { gitHash() }
我可以在Groovy中使用它,如:
println gitHash.invoke()
但它不适用于Kotlin脚本...因为invoke()指向call()(此处为https://github.com/gradle/gradle-script-kotlin/blob/master/src/main/kotlin/org/gradle/script/lang/kotlin/GroovyInteroperability.kt扩展方法) . 虽然我试图将它用作闭包 gitHash()
但它会导致这样的错误:
Parameter specified as non-null is null: method org.gradle.script.lang.kotlin.KotlinClosure.doCall, parameter it
看起来我错过了一些东西......
1 回答
如果你还在寻找解决方案,我建议这就是:
我用Gradle 4.6+测试了它
..或者更可能是惯用语: