Set vi as editor in GHCi

Question

How can I get vi editing mode to work in GHCi?

I'm using version 7.10.3.

I tried Prelude> :set editor vi, but to no effect.

I also have these lines in my ~/.inputrc.

set editing-mode vi
set keymap vi

.

Gyroscope

After you :set editor vi, what happens when you try to :edit a file? What do you mean "to no effect"? – Pancreatin

I do not mean to edit a file. "To no effect" means I can't get vi editing mode to work in GHCi, like it does not work when I press ESC to get into command mode to navigate/edit a text. In Bash shell i can do it. – Midpoint

Possible duplicate of How to customize the readline keybindings of ghci – Wineskin

there is some VI editing mode in GHCi? ... Or are you talking about setting up some GHCi REPL support for VI? – Analcite

@Carsten yes there is – Midpoint

Answer 1

GHCi now uses the Haskeline library for command line editing (which has been true for quite a while now), and it does indeed have a vi mode. The configuration file is ~/.haskeline and the line you want is:

editMode: Vi

Documented here: https://github.com/judah/haskeline/wiki/UserPreferences

Returnee

I've just started using it and I noticed that the ; and , commands to repeat f or F commands in one or the other direction do not work... – Spermiogenesis

Issue #60 on GitHub is just about this. – Spermiogenesis

Answer 2

This works without any issues on MacOS with The Glorious Glasgow Haskell Compilation System, version 9.4.3

ghci> :set editor vi
ghci> :edit <yourfilename>

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