java - 自定义gradle插件+访问方法的返回值？

Question

我创建了一个自定义插件来仅管理version.properties文件。一切正常，可以执行gradle任务，什么都不可以。我遇到的问题是如何在version中访问从任务返回的值(在运行时设置build.gradle变量)。

错误:

Build file '/Users/yomateod/workspace/work/spring.black/tags/build.gradle' line: 35

A problem occurred evaluating root project 'tags'.
> Could not find method getCurrentVersion() for arguments [] on root project 'tags' of type org.gradle.api.Project.

build.gradle中的第34和35行:

apply plugin: 'versionest'
version = getCurrentVersion()

任务类:

package matthewdavis.io.plugins.versionest.tasks;

import matthewdavis.io.plugins.versionest.Version;
import org.gradle.api.DefaultTask;
import org.gradle.api.tasks.TaskAction;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class GetVersion extends DefaultTask {

    public static Version getCurrentVersionFromFile() throws IOException {

        String file = Files.readString(Path.of("version.properties"));

        Pattern pattern = Pattern.compile("(\\d+)\\.(\\d+)\\.(\\d+)");
        Matcher matcher = pattern.matcher(file);

        matcher.find();

        Version version = new Version();

        if (matcher.groupCount() == 3) {

            version.setMajor(Integer.parseInt(matcher.group(1)));
            version.setMinor(Integer.parseInt(matcher.group(2)));
            version.setPatch(Integer.parseInt(matcher.group(3)));

        } else {

            System.out.println("ERROR: invalid format for version.properties");
        }

        return version;

    }

    @TaskAction
    public String getCurrentVersion() throws IOException {

        Version version = getCurrentVersionFromFile();

        System.out.println(version);

        return version.getMajor() + "." + version.getMinor() + "." + version.getPatch();

    }

}

如您在上面看到的，我有 getCurrentVersion()方法，并且可以通过gradle运行它，如预期的那样:

$ gradle getCurrentVersion

> Configure project :
unspecified
> Task :getCurrentVersion
Version(major=0, minor=1, patch=0)

完整的 build.gradle位于 https://github.com/spring-black/tags/blob/master/build.gradle#L35。

我在 https://github.com/mateothegreat/gradle-plugin-versionest/blob/master/src/main/java/matthewdavis/io/plugins/versionest/VersionestPlugin.java#L12声明我的任务
任务类位于 https://github.com/mateothegreat/gradle-plugin-versionest/blob/master/src/main/java/matthewdavis/io/plugins/versionest/tasks/GetVersion.java。

我怀疑我缺少从 build.gradle的全局范围调用任务的正确方法。任何帮助都会受到 的极大支持，表示赞赏。

谢谢你们!
-马修

Answer 1

想通了..我需要使用“扩展名”将我的值暴露给build.gradle:

project.getExtensions().create("versionest", VersionestExtension.class);

扩展类如下所示:

public class VersionestExtension {

    public Version getVersion() throws IOException {

        return GetVersion.getCurrentVersionFromFile();

    }

}

build.gradle:

apply plugin: 'versionest'
version = versionest.version.toString()

对 println version运行测试任务:

10:45:29 PM: Executing task 'compileJava'...

> Configure project :
0.1.0

对于遇到相同问题的用户，请查看 https://github.com/mateothegreat/gradle-plugin-versionest#setup