在gradle中为任务添加类路径的最好方法

Question

我正在尝试使用使用antbuilder的自定义gradle任务预生成jpa 2元模型类。

到目前为止我的代码是这样的:

task generateJpaMetaModel {
    doFirst {
        sourceSets.generated.output.classesDir.mkdirs()
        ant.javac (
                srcDir: "$projectDir/src/main/java",
                destDir: sourceSets.generated.output.classesDir,
                failonerror: true,
                fork: true
        ) {
            classpath {
                pathElement(location: buildscript.configurations.classpath.asPath)
                pathElement(location: configurations.compile.asPath)
            }
            compilerarg (value: "-proc:only")
        }
    }
    inputs.files "$projectDir/src/main/java"
    outputs.files sourceSets.generated.output.classesDir
}
compileGeneratedJava.dependsOn generateJpaMetaModel

我有一个自定义的generated sourceSet添加到我的项目，应用Java插件。

在我的依赖，我有各种JPA库:

dependencies {
    ...
    provided "javax.servlet:javax.servlet-api:$libraryVersions.servlet_api"
    provided "org.hibernate.javax.persistence:hibernate-jpa-2.0-api:$libraryVersions.hibernate_jpa_2"
}

在我的构建脚本中，我有一个依赖于元模型生成jar:

buildscript {
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath "org.hibernate:hibernate-jpamodelgen:$libraryVersions.hibernate_jpamodelgen"
    }
}

运行generateJpaMetaModel任务给了我以下输出，即使我认为我正确添加了类路径:

[ant:javac] C:UsersmeIdeaProjectsmyprojectsubprojectscoresrcmainjavacomexamplemyprojectcoremodelUser.java:152: error: cannot find symbol
[ant:javac]     @Column(name = ONE_COLUMN)
[ant:javac]      ^
[ant:javac]   symbol:   class Column
[ant:javac]   location: class User
[ant:javac] C:UsersmeIdeaProjectsmyprojectsubprojectscoresrcmainjavacomexamplemyprojectcoremodelUser.java:155: error: cannot find symbol
[ant:javac]     @Column(name = TWO_COLUMN)
[ant:javac]      ^
[ant:javac]   symbol:   class Column
[ant:javac]   location: class User
[ant:javac] C:UsersmeIdeaProjectsmyprojectsubprojectscoresrcmainjavacomexamplemyprojectcoremodelUser.java:158: error: cannot find symbol
[ant:javac]     @Column(name = RED_COLUMN)
[ant:javac]      ^
[ant:javac]   symbol:   class Column
[ant:javac]   location: class User
[ant:javac] C:UsersmeIdeaProjectsmyprojectsubprojectscoresrcmainjavacomexamplemyprojectcoremodelUser.java:161: error: cannot find symbol
[ant:javac]     @Column(name = BLUE_COLUMN)
[ant:javac]      ^
[ant:javac]   symbol:
----- End of the daemon log -----

阅读一些论坛后，我决定尝试添加类路径与addToAntBuilder方法FileCollection类:

(configurations.compile +  buildscript.configurations.classpath)
    .addToAntBuilder(ant, 'fileset', FileCollection.AntType.FileSet)
ant.javac (
        srcDir: "$projectDir/src/main/java",
        destDir: sourceSets.generated.output.classesDir,
        failonerror: true,
        fork: true,
        classpath: 'fileset'
) {
    compilerarg (value: "-proc:only")
}

然而，它仍然给我相同的输出。

谁能指出给ant任务添加类路径的最好方法是什么?

更新:

这是我第三次尝试相同的输出:

sourceSets.generated.output.classesDir.mkdirs()
ant.javac (
        srcDir: "$projectDir/src/main/java",
        destDir: sourceSets.generated.output.classesDir,
        failonerror: true,
        includeantruntime: true
) {
    (configurations.compile +  buildscript.configurations.classpath)
        .addToAntBuilder(ant, 'classpath', FileCollection.AntType.ResourceCollection)
    compilerarg (value: "-proc:only")
}

更新2:

这是我使用peter的建议的第四次失败的尝试:

task generateJpaMetaModel(type: JavaCompile) {
    source = fileTree("$projectDir/src/main/java")
    destinationDir = sourceSets.generated.output.classesDir
    sourceCompatibility = "1.7"
    targetCompatibility = "1.7"
    classpath = configurations.compile + buildscript.configurations.classpath
    options.compilerArgs = ["-proc:only"]    
}

我仍然有相同的输出

Answer 1

结果显示compile配置不包含来自所提供配置的依赖项。当我想到它时，这是有意义的，因为我不希望提供的jar在我的子项目jar/war中结束，如果它们将在运行时由容器提供。

我providedConfiguration

。Gradle插件文件包含以下内容:

/**
 * Adds a configuration named 'provided'. 'Provided' dependencies
 * are incoming compile dependencies that aren't outgoing
 * dependencies. In other words, they have no effect on transitive
 * dependency management.
 */
configurations {
    provided.extendsFrom(compile)
    testCompile.extendsFrom(provided)
}
sourceSets.main {
    compileClasspath += configurations.provided
}
plugins.withType(IdeaPlugin) {
    idea.module.scopes.PROVIDED.plus += configurations.provided
}

因此，我应该添加提供的配置，而不是将编译配置添加到javaccompile任务的类路径中:

task generateJpaMetaModel(type: JavaCompile) {
    ...
    classpath = configurations.provided + buildscript.configurations.classpath
    ...    
}