英文:
Vim replace content from file with output from external command
问题
我正在编写Go代码，我想用一个快捷键运行gofmt命令，并用gofmt的输出替换当前源文件的内容。
我在我的vimrc文件中定义了以下映射：
map <C-r> :r ! gofmt %<CR>，但这只是将输出追加到当前文件中。有没有办法覆盖它？
英文:
I am programming go and I want to run gofmt with a shortcut and replace the content of the current source file with the output of gofmt.
I have the following mapping defined in my vimrc:
map <C-r> :r ! gofmt %<CR> but this does simply append the output to the current file. Is there a way to override it?
答案1
得分: 6
你正在使用错误的命令：:read会将行追加到缓冲区中（使用! {cmd}可以从外部命令读取）。相反，你想要通过外部命令对当前缓冲区内容进行过滤。可以使用:help :range!来实现这一点。当没有传递文件时，gofmt命令会从标准输入读取（其他一些命令可以使用特殊的-参数）。因此，你可以这样做：
:nnoremap <C-r> :%! gofmt<CR>
注意事项
- 你应该使用
:noremap；它可以防止映射被重新映射和递归调用。 - 我将映射限制在了正常模式下；我认为直接从可视模式或操作等待模式启动这个命令是不必要的。
- 如评论中所提到的，可能已经有一个插件可以直接提供这个功能。
英文:
You're using the wrong command: :read appends lines to the buffer (with ! {cmd}: from an external command). Instead, you want to filter the current buffer contents through an external command. This is done via :help :range!. The gofmt command reads from stdin when no file is passed (some other commands take a special - argument for that. Ergo:
:nnoremap <C-r> :%! gofmt<CR>
Notes
- You should use
:noremap; it makes the mapping immune to remapping and recursion. - I've limited the mapping to normal mode; I don't think is necessary to directly launch this from visual mode or operator-pending mode.
- As mentioned in the comments, there's probably a plugin that already provides this out of the box.
答案2
得分: 5
gofmt标志-w将覆盖它正在修复的文件的内容。
英文:
The gofmt flag -w will overwrite the contents of the file it's fixing
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