安装格式化插件：shell-format
用VSCode打开shell脚本之后，按格式化快捷键Ctrl+Alt+F，会提示没有格式化shell的工具，然后安装插件，我装的是这个插件：shell-format。
介绍：https://marketplace.visualstudio.com/items?itemName=foxundermoon.shell-format
GitHub：https://github.com/mvdan/sh
用法
Ctrl+Alt+F- 右键 --> 格式化文档
插件不生效问题排查及处理
安装成功后，尝试格式化好几次，都没有生效，然后发现控制台有报错：
shfmt hasn't downloaded yet!Error: ENOENT: no such file or directory, stat 'c:\Users\Administrator\.vscode\extensions\foxundermoon.shell-format-7.2.5\bin\shfmt_v3.6.0_windows_amd64.exe'
Shfmt will be downloaded automatically!
download url: https://github.com/mvdan/sh/releases/download/v3.6.0/shfmt_v3.6.0_windows_amd64.exe
download to: c:\Users\Administrator\.vscode\extensions\foxundermoon.shell-format-7.2.5\bin\shfmt_v3.6.0_windows_amd64.exe
If the download fails, you can manually download it to the dest directory.
Or download to another directory, and then set the "shellformat.path" as the path
download shfmt page: https://github.com/mvdan/sh/releases
You can't use this plugin until the download is successful.
Effective shfmt flags: -i=4
Effective shfmt flags: -i=4
Effective shfmt flags: -i=4
Effective shfmt flags: -i=4
Effective shfmt flags: -i=4
Effective shfmt flags: -i=4
原来又是偶尔连不上GitHub导致不能下载这个文件：https://github.com/mvdan/sh/releases/download/v3.6.0/shfmt_v3.6.0_windows_amd64.exe，尝试重连，不行再用加速网站尝试：https://ghproxy.com/，下载成功后，放到报错提示的路径下，然后就可以正常格式化了。
