如何解决外部包对composer包的循环依赖？

Question

参见Github问题，这个问题起源于何处。

我的包是phpdocumentor/reflection-docblock**，，它不是依赖项。**

我正在尝试将phpdocumentor/reflection-docblock更新为更新的phpunit/phpunit依赖项，即更新开始使用包。

有新的循环依赖关系：

• (this) phpdocumentor/reflection-docblock包需要phpunit/phpunit
• phpunit/phpunit需要phpspec/prophecy (因为phpunit/phpunit 4.5)
• phpspec/prophecy需要此phpdocumentor/reflection-docblock ( this )包

抽象的：

• A需要B
• B需要C(新的！)
• C需要A

工作前

{
    "require-dev": {
        "phpunit/phpunit": "4.4"
    }
}

断后

{
    "require-dev": {
        "phpunit/phpunit": "4.5"
    }
}

当我跑步时：

composer update

编写器冲突输出

Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - Installation request for phpdocumentor/reflection-docblock dev-phpunit -> satisfiable by phpdocumentor/reflection-docblock[dev-phpunit].
    - phpspec/prophecy v1.3.1 requires phpdocumentor/reflection-docblock ~2.0 -> satisfiable by phpdocumentor/reflection-docblock[2.0.0, 2.0.1, 2.0.2, 2.0.3, 2.0.4, 2.0.5].
    - phpunit/phpunit 4.5.0 requires phpspec/prophecy ~1.3.1 -> satisfiable by phpspec/prophecy[v1.3.1].
    - Can only install one of: phpdocumentor/reflection-docblock[2.0.0, dev-phpunit].
    - Can only install one of: phpdocumentor/reflection-docblock[2.0.1, dev-phpunit].
    - Can only install one of: phpdocumentor/reflection-docblock[2.0.2, dev-phpunit].
    - Can only install one of: phpdocumentor/reflection-docblock[2.0.3, dev-phpunit].
    - Can only install one of: phpdocumentor/reflection-docblock[2.0.4, dev-phpunit].
    - Can only install one of: phpdocumentor/reflection-docblock[2.0.5, dev-phpunit].
    - Installation request for phpunit/phpunit 4.5 -> satisfiable by phpunit/phpunit[4.5.0].

我试过：

• minimum-stability: dev
• 别名"phpunit/phpunit": "4.5 as 4.4"

有什么办法吗？

Answer 1

添加

"extra": {
    "branch-alias": {
        "dev-master": "4.x-dev"
    }
}

到composer.json of phpdocumentor/reflection-docblock。

这将允许您将当前的主版用作满足需求的4.x版本。

缺点是。在继续使用版本时，您必须更新本节。