[treigerm]

I use an Atom extension called "gofmt" which automatically calls goimports[1] every time I save. So any unused imports will be removed and if I start to use new imports that are in my GOPATH or the standard library then it automatically adds them.

[1] https://godoc.org/golang.org/x/tools/cmd/goimports

[millstone]

How does that work with undo?

[anezvigin]

I can't speak for Atom, but here's what it's like in VIM: http://i.imgur.com/GkP4Yk9.gif

[joshka]

Works the same in Atom.

[buro9]

goimports guesses the one you want and adds it back.

[millstone]

My question was, since goimports modifies your document (and gofmt even more so), is your undo stack preserved across saves? If so, how?

[_asummers]

In Eclipse, this is true. The import was considered an "action" that got put into your undo stack. It was just triggered by the editor, not you.

[buro9]

That's a question for your text editor.

I use Sublime Text 3 with GoSublime and have noticed that the undo stack is just my changes (makes sense, the goimports is an external process), but that's cool because any CTRL+S is going to trigger goimports and so the correction of the imports is invisible and always there.

[Leon]

I believe it has worked well for me for undo. However some other Atom formatters have broken my undo in weird ways, namely the formatter for Node JS I had turned on to auto format on saves. I had to turn it off.