重新显示brew安装后配置文本

Question

通常，当我使用brew package manager在我的Macintosh计算机上安装工具和编程环境时，在安装的末尾会有一些重要的文本，描述使用我刚刚安装的工具的一些细微差别。例如，在安装redis之后，您将看到类似以下内容

$ brew install redis
# ... lots of stuff ...
==> Caveats
To restart redis after an upgrade:
  brew services restart redis
Or, if you don't want/need a background service you can just run:
  redis-server /usr/local/etc/redis.conf

除了运行brew uninstall [thing];然后重新运行brew install [thing];之外，有没有办法让brew重新显示此文本？

如果不是--假设这个文本来自某个程序，有没有办法获取brew -- package？(不确定这是不是正确的术语) --并在某个结构良好的数据文件或程序中找到此文本？

Answer 1

这些被称为“警告”，并使用brew info打印。有关youtube-dl的示例，请参阅以下内容

$ brew install youtube-dl
...
==> Caveats
To use post-processing options, `brew install ffmpeg` or `brew install libav`.

Bash completion has been installed to:
  /home/baptiste/.linuxbrew/etc/bash_completion.d

zsh completion has been installed to:
  /home/baptiste/.linuxbrew/share/zsh/site-functions

fish completion has been installed to:
  /home/baptiste/.linuxbrew/share/fish/vendor_completions.d

==> Summary
?  /.../Cellar/youtube-dl/2017.03.10: 11 files, 1.8M

然后：

$ brew info youtube-dl
...
==> Caveats
To use post-processing options, `brew install ffmpeg` or `brew install libav`.

Bash completion has been installed to:
  /home/baptiste/.linuxbrew/etc/bash_completion.d

zsh completion has been installed to:
  /home/baptiste/.linuxbrew/share/zsh/site-functions

fish completion has been installed to:
  /home/baptiste/.linuxbrew/share/fish/vendor_completions.d

您还可以使用brew info --json=v1检索特定于公式的警告(而不是补全内容)，例如：

$ brew info --json=v1 youtube-dl | jq .
[
  {
    "name": "youtube-dl",
    "full_name": "youtube-dl",
    "desc": "Download YouTube videos from the command-line",
    "homepage": "https://rg3.github.io/youtube-dl/",
    ...
    "caveats": "To use post-processing options, `brew install ffmpeg` or `brew install libav`.",
    ...
  }
]

注意，我使用了jq来美化输出。