我正在尝试将代码从用“ apply from：”附带的Gradle脚本编写的几个插件集中移动到“ apply plugin：”附带的一罐Groovy脚本中。我大部分时候都取得了成功，但是在为具有扩展插件的插件创建“扩展对象”时遇到了麻烦。我似乎无法在插件的apply函数中引用扩展类名称。我缺少基本的东西-这是什么？
我将问题简化为一个简单的示例，希望它将作为有用的模板。这是一个名为“ sample”的插件：
插件：plugin \ src \ main \ groovy \ com \ company \ gradle \ sample.groovy：
package com.company.gradle
import org.gradle.api.GradleException
import org.gradle.api.Project
import org.gradle.api.Plugin
import org.gradle.api.Task
// Configuration object (project may override these values)
class sampleExtension {
String product // product code - 3 alphanumeric characters
String customer // customer id - integer 0-999999
sampleExtension() {
this.product = 'ABC'
this.customer = '123'
}
}
class sample implements Plugin<Project> {
void apply(Project target) {
println "SAMPLE: A"
// create the configuration objects for this plugin
target.extensions.create('sample', sampleExtension)
println "SAMPLE: B"
// This task generates the license.
Task sampleTask = target.task('printProperties') {
doFirst {
println("target.sample.product = '$target.sample.product'")
println("target.sample.customer = '$target.sample.customer'")
}
}
println "SAMPLE: C"
}
}
printlns很有帮助，因为在使用示例的项目中，插件错误被报告为在项目脚本而不是插件脚本中的某些行发生。我不确定构造函数是否必要；我也尝试过将扩展类嵌套在类'sample'中
插件\ src \ main \ resources \ META-INF \ gradle-plugins \ sample.properties：
implementation-class=com.company.gradle.sample
plugin \ build.gradle
apply plugin: 'groovy'
apply plugin: 'maven'
dependencies {
compile gradleApi()
compile localGroovy()
}
group = 'com.company.gradle'
version = '1.0'
uploadArchives {
repositories { mavenDeployer { repository(url: uri('../repo')) }}
}
那是插件。这是项目脚本，对于此示例而言，该脚本没有代码-只需执行示例插件提供的任务即可：
project \ build.gradle：
buildscript {
repositories{ maven{url uri('../repo')} }
dependencies { classpath 'com.company.gradle:plugin:1.0' }
}
apply plugin: 'sample'
该插件使用“ gradle build uploadArchives”构建，并且编译干净。该项目使用“ gradle printProperties”构建。它显示“ A”消息，并抱怨它未能应用示例插件，因为类'com.company.gradle.sample'的'无此类属性：sampleExtension'。
c:\jdev\project>gradle printProperties
SAMPLE: A
FAILURE: Build failed with an exception.
* Where:
Build file 'C:\jdev\project\build.gradle' line: 9
* What went wrong:
A problem occurred evaluating root project 'project'.
> Failed to apply plugin [id 'sample']
> No such property: sampleExtension for class: com.company.gradle.sample
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug
option to get more log output.
BUILD FAILED
Total time: 2.13 secs
当插件被编写为包含在project \ build.gradle中的'sample.groovy'脚本，并带有'apply from：sample.groovy'时，插件代码起作用。
嵌套我的扩展类时，失败有所不同：“无法创建com.company.gradle.sample $ sampleExtension_Decorated类型的实例。”
当您有扩展对象并且插件以.groovy编写以用于插件jar而不是.gradle进行直接包含时，该模式是什么？
感谢您抽出宝贵的时间来解决所有这些问题...
使用经过稍微修改的代码版本，我可以获取模型的值。
build.gradle：
group 'com.jbirdvegas.so'
version '1.0-SNAPSHOT'
apply plugin: 'groovy'
// apply our plugin... calls SamplePlugin#apply(Project)
apply plugin: 'sample'
repositories {
mavenCentral()
}
dependencies {
compile localGroovy()
}
// caller populates the extension model applied above
sample {
product = 'abc'
customer = 'zyx'
}
// dummy task to limit console output for example
task doNothing <<{}
buildSrc / src / main / groovy / com / jbirdvegas / so / a3850424 / SamplePlugin.groovy：
package com.jbirdvegas.so.a38504024
import org.gradle.api.Plugin
import org.gradle.api.Project
class SamplePlugin implements Plugin<Project> {
@Override
void apply(Project target) {
// create our extension on the project for our model
target.extensions.create('sample', SampleModel)
// once the script has been evaluated the values are available
target.afterEvaluate {
// here we can do whatever we need to with our values
println "populated model: $target.extensions.sample"
}
}
}
buildSrc / src / main / groovy / com / jbirdvegas / so / a38504024 / SampleModel.groovy：
package com.jbirdvegas.so.a38504024
// define our DSL model
class SampleModel {
public String product;
public String customer;
@Override
public String toString() {
final StringBuilder sb = new StringBuilder("SampleModel{");
sb.append("product='").append(product).append('\'');
sb.append(", customer='").append(customer).append('\'');
sb.append('}');
return sb.toString();
}
}
buildSrc / src / main / resources / META-INF / gradle-plugins / sample.properties
implementation-class=com.jbirdvegas.so.a38504024.SamplePlugin
使用此设置，我们可以在DSL块中看到呼叫者提供的值
$ ./gradlew -q doNothing
SampleModel{product='abc', customer='zyx'}
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