自定义Gradle Java插件在V5.2.1中崩溃，但在V4.7中工作？

Question

package com.zift.utilities;

import org.gradle.api.Plugin;
import org.gradle.api.Project;

public class ZiftVersionPlugin implements Plugin<Project> {
    public void apply(Project project) {
        project.getTasks().create("manageVersion", ZiftVersion.class, (task) -> {
            // Added breakpoint here, but it's never reached!
            task.setProject(project);
        });
    }
}

package com.zift.utilities;

import org.gradle.api.DefaultTask;
import org.gradle.api.tasks.Input;
import org.gradle.api.tasks.TaskAction;
import org.gradle.api.tasks.options.Option;
import org.gradle.api.Project;

public class ZiftVersion extends DefaultTask {
    @Input private Project project;
    private String projectDir=null;
    private String propFileFullPath=null;
    private String sourceBranch=null;
    private String destinationBranch="staging";

    String getPropFile() { return propFileFullPath; }
    void setPropFile(String fn) { this.propFileFullPath = fn; }

    public Project getProject() { return project; }
    public void setProject(Project project) {
        this.project = project;
        this.projectDir = this.project.getRootDir().toString();
    }

    // The void set*() functions have to immediately follow their corresponding
    // @Option() so they can take arguments in the command line, e.g.,
    // $ ./gradlew manageVersion \
    //             --srcBranch=bugfix/devops-507-semver --dstBranch=master
    @Option(option = "srcBranch", description = "Source branch of the pull request")
    public void setSrcBranch(String s) { this.sourceBranch = s; }
    public String getSrcBranch() { return sourceBranch; }

    @Option(option = "dstBranch", description = "Destination branch of the pull request")
    public void setDstBranch(String d) { this.destinationBranch = d; }
    public String getDstBranch() { return destinationBranch; }

    @TaskAction
    void manageProjectVersion() {
        System.out.println("Hello world!");
    }
}

plugins {
  id 'idea'
  id 'java'
  id 'maven'
  id 'maven-publish'
  id 'java-gradle-plugin'
}

group=project.groupId
version = '666.666.666'

dependencies {
  compile gradleApi()
}

jar {
  manifest {
    attributes 'artifactId': 'zift-version-plugin',
               'groupId': 'com.zift.utilities',
               'version': project.version
  }
  baseName artifactId
  doLast {
    println "artifactId: $project.artifactId\ngroupId: $project.groupId\nversion: $version"
  }
}

gradlePlugin {
    plugins {
        simplePlugin {
            id = 'com.zift.utilities.zift-version-plugin'
            implementationClass = 'com.zift.utilities.ZiftVersionPlugin'
        }
    }
}

$ ./gradlew manageVersion --srcBranch=feature/devops-507-semver-support --dstBranch=master
> Task :manageVersion
Hello world!

下面是异常，它看起来像是在create()函数调用期间发生的。

Caused by org.gradle.api.internal.tasks.DefaultTaskContainer$TaskCreationException: Could not create task ':manageVersion'
Caused by java.lang.NullPointerException:  (No message provided)
at org.gradle.api.internal.tasks.TaskPropertyUtils.visitProperties(TaskPropertyUtils.java:38)
at org.gradle.api.internal.project.taskfactory.PropertyAssociationTaskFactory.create(PropertyAssociationTaskFactory.java:49)
at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory.create(AnnotationProcessingTaskFactory.java:46)
...
at org.gradle.api.internal.tasks.DefaultTaskContainer.create(DefaultTaskContainer.java:359)
at com.zift.utilities.ZiftVersionPlugin.apply(ZiftVersionPlugin.java:8)

有线索吗？

Answer 1

白痴是原因，尤其是我的白痴。

我在V4.x中使用Gradle wrapper编译了我的插件，所以当一个用V5.x或更高版本构建的项目使用它时，插件就会崩溃。

解决方案是将我的插件包装器升级到Gradle V6.0，构建并发布一个新版本，并让项目使用新版本。别再撞车了。