在 Gradle 中,如何以编程方式排除然后强制依赖?

In Gradle, how programmatically to exclude then force a dependency?

最终目标是用不同的版本替换传递依赖的版本。需要注意的是,替换应该由那些依赖于正在构建的库的人来选择(我不知道它是标准 Gradle 还是插件,但如果我们 exclude 是传递依赖,则生成ivy.xml 文件将包含该信息)。

实现最终目标的一种可能方法是 exclude 有问题的依赖性,然后在以后强制该依赖性。

exclude依赖的方法是:

dependencies {
    compile 'org:name:version' {
        exclude(group: 'group', module: 'module')
    }
}

force 依赖的方法是这样的:

configurations.all {
    resolutionStrategy {
        eachDependency { DependencyResolveDetails dependencyResolveDetails ->
            final requestedDependency = dependencyResolveDetails.requested
            if (requestedDependency.group == 'org' && requestedDependency.name == 'name') {
                force 'group:module:good_version'
            }
        }
    }
}

为了将两者联系在一起,resolutionStrategy 必须知道哪些依赖实际上 excluded 是稍后将成为 forced 的传递依赖。如何以通用方式完成此操作(假设有一种通用方式来执行 exclude)?如果没有办法将两者联系在一起,是否有不同的方法来实现最终目标?

首先,抽象依赖关系,使它们看起来像:

dependencies {
    compile dep('org:name')
}

dep 函数可以定义为自动排除的方式:

final rev = [
    'group:module': 'good_version'
    'org:name': 'version']

ext.rev = { m ->
    rev[m]
}

final dep = { m ->
    "${m}:${ext.rev(m)}"
}

final forcedTransitiveDeps = [
        'org:name': [
            dep('group:module')]].withDefault({[]})

ext.forcedTransitiveDeps = { m ->
    forcedTransitiveDeps[m]
}

ext.dep = { m ->
    if (!forcedTransitiveDeps.containsKey(m)) {
        project.dependencies.create(dep(m))
    } else {
        project.configure(
                project.dependencies.create(dep(m)),
                {
                    forcedTransitiveDeps[m].each { dependency ->
                        final dependencyParts = dependency.split(':')
                        exclude(group: dependencyParts[0], module: dependencyParts[1])
                    }
                })
    }
}

最后,重新引入并强制依赖:

subprojects { subproject ->
    subproject.afterEvaluate {
        subproject.configurations.all { Configuration configuration ->
            final dependencies = configuration.getDependencies()
            final forcedDependencies = (dependencies.collect { dependency ->
                forcedTransitiveDeps("${dependency.group}:${dependency.name}")
            }).flatten()
            if (!forcedDependencies.isEmpty()) {
                logger.info("Forcing ${subproject} dependencies on ${forcedDependencies} as per `ext.forcedTransitiveDeps`.")
                dependencies.addAll(forcedDependencies.collect { forcedDependency ->
                    subproject.dependencies.create(forcedDependency)
                })
            }
        }
    }
}