Travis.ci：“composer requirements could not be resolved”但本地一切正常（Yii2）

Question

我正在为Yii2框架构建一个软件包。

在本地一切都运行得很好：测试结果正确，composer安装/更新依赖项没有问题（我已经在几台不同的开发环境机器上尝试过，完全没有问题）。

但是当travis-ci尝试构建我的项目时，相同的composer命令返回一个错误：“无法将您的要求解析为可安装的软件包集”。

Problem 1
    - yiisoft/yii2 2.0.4 requires bower-asset/jquery 2.1.*@stable | 1.11.*@stable -> no matching package found.
    - yiisoft/yii2 2.0.3 requires bower-asset/jquery 2.1.*@stable | 1.11.*@stable -> no matching package found.
    - yiisoft/yii2 2.0.2 requires bower-asset/jquery 2.1.*@stable | 1.11.*@stable -> no matching package found.
    - yiisoft/yii2 2.0.1 requires bower-asset/jquery 2.1.*@stable | 1.11.*@stable -> no matching package found.
    - yiisoft/yii2 2.0.0 requires bower-asset/jquery 2.1.*@stable | 1.11.*@stable -> no matching package found.
    - Installation request for yiisoft/yii2 2.0.* -> satisfiable by yiisoft/yii2[2.0.0, 2.0.1, 2.0.2, 2.0.3, 2.0.4].
Potential causes:
 - A typo in the package name
 - The package is not available in a stable-enough version according to your minimum-stability setting
   see <https://groups.google.com/d/topic/composer-dev/_g3ASeIFlrc/discussion> for more details.

这是我的composer.json要求：

"require": {
    "php": ">=5.4.0",
    "mobileka/scope-applicator": "1.0.*",
    "yiisoft/yii2": "2.0.*"
},
"require-dev": {
    "phpunit/phpunit": "4.1.*",
    "mockery/mockery": "0.9.3",
    "satooshi/php-coveralls": "0.6.1"
},

让我再说一遍：这在本地可以工作，其他人也尝试克隆我的存储库，一切都很顺利。你可以自己尝试：https://github.com/mobileka/scope-applicator-yii2。使用以下命令：git clone [e-mail]:mobileka/scope-applicator-yii2.git && cd scope-applicator-yii2 && composer install。是否还有其他人面临这个问题，并且有解决方案吗？谢谢。

- Armen Markossyan

Answer 1

问题通过修改.travis.yml文件得以解决：

before_script:
  - composer self-update
  - composer global require "fxp/composer-asset-plugin:~1.0.0"
  - composer install --prefer-source --no-interaction

它缺乏一个全局要求 "fxp/composer-asset-plugin:~1.0.0"。

- Armen Markossyan