我使用composer来制造斑点：
$ composer create-project flarum/flarum . --stability=beta
Installing flarum/flarum (v0.1.0-beta.7)
- Installing flarum/flarum (v0.1.0-beta.7): Downloading (100%)
Downloading (100%)
Downloading (100%) Failed to download flarum/flarum from dist: Could not delete ./:
Now trying to download from source
- Installing flarum/flarum (v0.1.0-beta.7): Cloning 6916205522 from cache
[RuntimeException]
Could not delete ./:
create-project [-s|--stability STABILITY] [--prefer-source] [--prefer-dist] [--repository REPOSITORY] [--repository-url REPOSITORY-URL] [--dev] [--no-dev] [--no-custom-installers] [--no-scripts] [--no-progress] [--no-secure-http] [--keep-vcs] [--remove-vcs] [--no-install] [--ignore-platform-reqs] [--] [<package>] [<directory>] [<version>]
install composer命令是：
curl -sS https://getcomposer.org/installer | php
mv composer.phar /usr/local/bin/composer