当我运行bundle exec cap production deploy:check:linked_files时，我获得了成功，但如果我添加--dry-run进行测试，那就会失败。
参见输出：
bundle exec cap production deploy:check:linked_files
DEBUG [c593caa5] Running /usr/bin/env [ -f /home/app/www/shared/config/database.yml ] as app@xxx.xxx.xxx.xxx
DEBUG [c593caa5] Command: [ -f /home/app/www/shared/config/database.yml ]
DEBUG [c593caa5] Finished in 3.206 seconds with exit status 0 (successful).
DEBUG [9619277e] Running /usr/bin/env [ -f /home/app/www/shared/config/mongoid.yml ] as app@xxx.xxx.xxx.xxx
DEBUG [9619277e] Command: [ -f /home/app/www/shared/config/mongoid.yml ]
DEBUG [9619277e] Finished in 0.304 seconds with exit status 0 (successful).
用--dry-run：
bundle exec cap production deploy:check:linked_files --dry-run
DEBUG [26483ac3] Running /usr/bin/env [ -f /home/app/www/shared/config/database.yml ] as app@xxx.xxx.xxx.xxx
DEBUG [26483ac3] Command: [ -f /home/app/www/shared/config/database.yml ]
ERROR linked file /home/app/www/shared/config/database.yml does not exist on xxx.xxx.xxx.xxx
这是预料还是某种错误？
答案 0 :(得分：2)
由于--dry-run在Capistrano中的运作方式，这是一个错误。在空运行期间，所有test命令都返回false。所以Capistrano认为链接文件不存在，它放弃了。