vim-go写入磁盘时删除未使用的代码

Question

I have imported several packages into a file in a Go package (package commands) I am writing (following along with a golang tutorial) using Vim with the Vim-Go plugin. Several of these packages are not yet used in the package. When I save the file :w, Vim seems to be deleting the unused packages, which is really annoying because those unused packages are going to be used. I just haven't added the necessary code for them. Is there a way to turn off this functionality in Vim-Go or do I have to delete the whole plugin to get rid of this annoying behavior?

Before Write

package commands
import (
    "fmt"
    "os"
    "time"

    rss "github.com/jteeuwen/go-pkg-rss"
    "github.com/spf13/cobra"
    "github.com/spf13/viper"
)

After Save

import (
    "github.com/spf13/cobra"
    "github.com/spf13/viper"
)

Answer 1

This is because you're using goimports as the tool to use when formatting your go code (I think vim-go does this by default - and it formats code on save by default). goimports removes unused imports for you .. thats why its so great. You will learn to love it at some point :)

For now, what you want to use is gofmt to format your code, which doesn't touch imports - it only formats the code. You can put this in your .vimrc:

let g:go_fmt_command = "gofmt"

If you decide you want to manually run goimports on your file after you've done the above .. you can run :GoImports.

You can also choose another option if you prefer: you can turn off formatting on save by putting this into your .vimrc:

let g:go_fmt_autosave = 0

Then, you can still use goimports when formatting your code .. but it won't do it automatically on save.