Question

我已根据https://getcomposer.org/doc/00-intro.md#globally上的说明全局安装了Composer，然后尝试安装drush。不幸的是，drush无法安装，给出以下错误：

composer install
Loading composer repositories with package information
Installing dependencies (including require-dev) from lock file
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - Installation request for symfony/console v3.0.1 -> satisfiable by symfony/console[v3.0.1].
    - symfony/console v3.0.1 requires php >=5.5.9 -> your PHP version (5.4.16) or value of "config.platform.php" in composer.json does not satisfy that requirement.
  Problem 2
    - symfony/console v3.0.1 requires php >=5.5.9 -> your PHP version (5.4.16) or value of "config.platform.php" in composer.json does not satisfy that requirement.
    - psy/psysh v0.6.1 requires symfony/console ~2.3.10|^2.4.2|~3.0 -> satisfiable by symfony/console[v3.0.1].
    - Installation request for psy/psysh v0.6.1 -> satisfiable by psy/psysh[v0.6.1].

即使http://docs.drush.org/en/master/install列出：

Drush 8 master  PHP 5.4.5+

我的环境是：

CentOS Linux release 7.2.1511 (Core) 
php -v
PHP 5.4.16 (cli) (built: Jun 23 2015 21:17:27) 
Copyright (c) 1997-2013 The PHP Group
Zend Engine v2.4.0, Copyright (c) 1998-2013 Zend Technologies

并且很遗憾我无法升级PHP，因为我需要严格遵循RHEL / CentOS官方版本。

然后我决定尝试Drush 7.x分支，不幸的是它也给了：

composer install
Loading composer repositories with package information
Installing dependencies (including require-dev) from lock file
Your requirements could not be resolved to an installable set of packages.

Problem 1
- Installation request for symfony/console v3.0.1 -> satisfiable by symfony/console[v3.0.1].
- symfony/console v3.0.1 requires php >=5.5.9 -> your PHP version (5.4.16) or value of "config.platform.php" in composer.json does not satisfy that requirement.
Problem 2
- symfony/console v3.0.1 requires php >=5.5.9 -> your PHP version (5.4.16) or value of "config.platform.php" in composer.json does not satisfy that requirement.
- psy/psysh v0.6.1 requires symfony/console ~2.3.10|^2.4.2|~3.0 -> satisfiable by symfony/console[v3.0.1].
- Installation request for psy/psysh v0.6.1 -> satisfiable by psy/psysh[v0.6.1].

在这种情况下我该怎么做？

Answer 1

你试过这样的吗？为最新的HEAD版本执行此操作：

composer global require drush/drush:dev-master

如果您需要特定版本，请执行此操作，例如版本7的最新版本：

composer global require drush/drush:7.*

Drush无法安装：您的要求无法解析为可安装的软件包集

1 个答案: