自动命令

Created: November-22, 2018

环绕 `autocmd` 命令

autocmd 是一个附加命令，默认情况下你可能不希望出现此行为。

例如，如果你在编辑时重新发送你的 .vimrc 几次，vim 可能会变慢。

这是证据：

:autocmd BufWritePost * if &diff | diffupdate | endif " update diff after save
:autocmd BufWritePost * if &diff | diffupdate | endif " update diff after save

如果你现在输入:autocmd BufWritePost *，你会看到输出中的两行，而不只是一行。两者都被执行了。

要避免此行为，请按如下方式环绕所有 autocmds：

if has ('autocmd')       " Remain compatible with vi which doesn't have autocmd
  augroup MyDiffUpdate   " A unique name for the group.  DO NOT use the same name twice!
      autocmd!           " Clears the old autocommands for this group name
      autocmd BufWritePost * if &diff | diffupdate | endif   " Update diff after save
      " ... etc ...
  augroup END
endif

环绕 autocmd 命令

环绕 `autocmd` 命令