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One-line Haskell Vim install
VimL Shell
Latest commit 1797ae0 May 20, 2016 @SimpleX91 SimpleX91 committed with Add HVN replacing user's configs warning to README (#177)
* Add HVN replacing user's configs warning to README

* Example of what would be removed

Signed-off-by: Anton Kondrachkov <>

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Haskell Vim IDE

In less than ten minutes your Vim will transform into a beautiful Haskell paradise. (Don't worry, it backs up your original configuration to ~/.config/haskell-vim-now/backup/.vimrc.yearmonthdate_time.) It also builds all necessary support binaries including codex, hscope, hdevtools, hasktags, hoogle and more.

No more wading through plugins trying to make them all work together. In ten minutes you will have a fully functional Vim that looks great and lets you

  • inspect types
  • evaluate Haskell
  • lint and check
  • manipulate tags
  • hoogle lookup
  • pointfree refactor
  • tab complete
  • unicode symbols
  • highlight DSLs
  • work with git


One command does it all:

bash <(curl -sL

WARNING: this command, once succeed, will make backups and remove your existing VIM configurations (.vim, plugins etc). You can later customize HVN configurations.

Keybindings and commands

The commands are organized into logical groups to help you remember them.

Types, autocomplete, refactoring, and linting

<Tab>Autocomplete with words in file
<C-space>Autocomplete with symbols in your Cabal sandbox
,htShow type of expression under cursor
,hTInsert type of expression into previous line
,hrApply one refactoring hint at cursor position
,hRApply all refactoring suggestions in the file
,hlRun Haskell linter on file
,hcRun Haskell compile check on file
,<cr>Clear type selection


,hhRun Hoogle on the word under the cursor
,hHRun Hoogle and prompt for input
,hiRun Hoogle for detailed information on word under cursor
,hIRun Hoogle for detailed information and prompt for input
,hzClose the Hoogle search window

GHCI repl

If you open a tmux terminal alongside MacVim then you can send Vim selections to it. This works well for evaluating things in GHCI.

,rsSend selected text to tmux
,rvChange tmux session, window, and pane attachment


,g?Last-committed files (Monday morning key)
,gsGit status (fugitive)
,ggGit grep
,glGit log (extradition)
,gdGit diff
,gbGit blame


gcComment / Uncomment selection


,a=Align on equal signs
,a,Align on commas
,a|Align on vertical bar
,apAlign on character of your choice

Splits and find file

,<space>Fuzzy file find (CtrlP)
,fToggle file browser, find file
,FToggle file browser
,sjOpen split below
,skOpen split above
,shOpen split leftward
,slOpen split rightward


,tgGenerate tags with codex
,ttOpen/close the tag bar
C-]Jump to definition of symbol (codex + hasktags)
C-\Show uses of symbol (hscope)


,h.Transform visual selection to pointfree style
,h>Transform visual selection to pointed style


,bpPrevious buffer
,bnNext buffer
,b<space>Buffer fuzzy finder
,bdDelete buffer, keep window open (bbye)
,boClose all buffers except the current one


,maEnable mouse mode (default)
,moDisable mouse mode
,igToggle indentation guides
,uInteractive undo tree
,ssEnable spell checking
,eOpen file prompt with current path
,<cr>Clear search highlights
,rRedraw screen
C-hMove cursor to leftward pane
C-kMove cursor to upward pane
C-jMove cursor to downward pane
C-lMove cursor to rightward pane (redraw is `,r` instead)
gqFormat selection using `stylish-haskell` for haskell buffers (`par` for others)
,yYank to OS clipboard
,dDelete to OS clipboard
,pPaste from OS clipboard

(If you prefer to restore the default screen redraw action of C-l then add unmap <c-l> to your vimrc.local)


After installing this configuration, your .vimrc and .vim will be under version control. Don't alter these files. Instead, add your own settings to ~/.config/haskell-vim-now/vimrc.local.pre, ~/.config/haskell-vim-now/vimrc.local and ~/.config/haskell-vim-now/plugins.vim.

Adding Custom Plugs

vim-plug requires all Plug statements to be given at once. To accommodate this restriction, .vimrc sources ~/.config/haskell-vim-now/plugins.vim immediately after its own Plug statements.

Plug statements made elsewhere are not recognized.

Neovim support

The .vimrc configuration is fully compatible with Neovim, and adds a few Neovim specific mappings for the terminal mode (terminal emulation is activated with :terminal). The mappings make Esc and c-[hjkl] function as one would expect them to from normal mode.

The Neovim configuration is found at .config/nvim, and is symlinked just like regular vim, which means you should only add your own settings to ~/.config/haskell-vim-now/vimrc.local.pre, ~/.config/haskell-vim-now/vimrc.local and ~/.config/haskell-vim-now/plugins.vim.

You can quickly backup and replace your Neovim setup by running the scripts/ script.

Docker image

If you are into developing with Docker, you can use the image.

docker pull haskell:7.8
docker build -t haskell-vim .
docker run --rm -i -t haskell-vim /bin/bash

If instead you want to extract the vim setup from the image that is easy enough

docker build -t haskell-vim .
mkdir ~/.haskell-vim-now
cd ~/.haskell-vim-now
docker run --rm haskell-vim tar -cz -C /root/.haskell-vim-now . > haskell-vim-now.tgz
tar -xzf haskell-vim-now.tgz

However, some things (for example the hoogle database) use absolute paths and don't work correctly.


See this wiki page for tips on fixing installation problems.

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