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Composer

安装 Composer​

方式一​

sudo apt install composer
composer -V # 验证

方式二​

curl -sS https://getcomposer.org/installer | sudo php -- --install-dir=/usr/local/bin --filename=composer
composer -V # 验证

查看当前源​

composer config -gl |grep url
# [repositories.packagist.org.url] https://repo.packagist.org

全局更改源​

阿里云​

更改为阿里云提供的 Composer 镜像地址

composer config -g repo.packagist composer https://mirrors.aliyun.com/composer/
composer update nothing # 更改 json 文件的网址

packagist​

还原到默认的 packagist 地址

composer config -g --unset repos.packagist
# 或者
composer config -g repo.packagist composer https://packagist.org

Composer 本身，升/降级​

升级​

➜  ~ composer self-update
Upgrading to version 2.3.5 (stable channel).

Use composer self-update --rollback to return to version 2.2.7

降级​

composer self-update –1

更新软件包​

更新前执行下

composer outdated

其他​

composer diagnose