Rails 部署失败，因为 SSHKit 命令失败答案

【问题标题】：Rails deploy fails, as SSHKit command failedRails 部署失败，因为 SSHKit 命令失败
【发布时间】：2023-01-30 04:11:41
【问题描述】：

编译 javascript 资产时最新的 rails 6 部署问题。错误指向

    1: from /Users/deploy/.rbenv/versions/2.6.1/lib/ruby/gems/2.6.0/gems/sshkit-1.21.2/lib/sshkit/runners/parallel.rb:11:in `block (2 levels) in execute'
/Users/deploy/.rbenv/versions/2.6.1/lib/ruby/gems/2.6.0/gems/sshkit-1.21.2/lib/sshkit/runners/parallel.rb:15:in 
'rescue in block (2 levels) in execute': Exception while executing as deploy@16.17.18.2: rake exit status: 1 
(SSHKit::Runner::ExecuteError)

[...]

Caused by:
SSHKit::Command::Failed: rake exit status: 1
rake stdout: yarn install v1.22.17
[1/4] Resolving packages...
[2/4] Fetching packages...
[3/4] Linking dependencies...
[4/4] Building fresh packages...
Done in 25.51s.
Compiling...
Compilation failed:
rake stderr: Nothing written

Tasks: TOP => deploy:assets:precompile
(See full trace by running task with --trace)
The deploy has failed with an error: Exception while executing as deploy@16.17.18.2: rake exit status: 1
rake stdout: yarn install v1.22.17
[1/4] Resolving packages...
[2/4] Fetching packages...
[3/4] Linking dependencies...
[4/4] Building fresh packages...
Done in 25.51s.
Compiling...
Compilation failed:
rake stderr: Nothing written

我不知道这里发生了什么。应该如何解决？

【问题讨论】：

看起来您的远程部署过程隐藏了错误。如果您自己通过 SSH 部署@... 并直接运行rake assets:precompile，会发生什么情况？
这个过程自然地在 yarn install v1.22.17 [1/4] 解决包...成功已经是最新的。编译...` 但实际上完成了。

标签： ruby-on-rails capistrano

【解决方案1】：

如果资产预编译直接在远程服务器上工作，那么是时候看看当 capistrano 连接到服务器时 SSHKit 设置了什么条件：

ssh 连接是否超时？
直接 SSH 与 SSHKit 会话相比设置了哪些环境变量？

有一个 Capistrano —-trace 选项可以帮助您揭示更多信息。

【讨论】：