neovim: switched to treefmt

default.nix

@@ -1,13 +1,16 @@
 { sources ? import ./nix/sources.nix, system ? builtins.currentSystem
 , crossSystem ? null, config ? { }
+, alejandraUnstable ? (import sources.nixpkgsUnstable { }).alejandra
 , cardanoNodeProject ? import sources.cardano-node { } }@args:
 with import ./nix args; {
   shell = mkShell {
     inherit (import sources.niv { }) niv;
     buildInputs = [
+      alejandraUnstable # The Uncompromising Nix Code Formatter
       cardanoNodeProject.cardano-cli # required for KES key rotation
       niv
       nixopsUnstable # work around for issue #127423
+      treefmt # one CLI to format the code tree
     ];
     NIX_PATH = "nixpkgs=${sources.nixpkgs}";
     NIXOPS_DEPLOYMENT = "${globals.deploymentName}";

profiles/neovim.nix

@@ -10,12 +10,12 @@
             start = [
               airline # Lean & mean status/tabline for vim that's light as air
               dracula-vim # Dracula theme for vim
+              formatter-nvim # A format runner for neovim
               fugitive # Vim Git wrapper
               fzf-vim # Full path fuzzy file, buffer, mru, tag, finder for Vim
               haskell-vim # Syntax Highlighting and Indentation for Haskell
               indentLine # Display thin vertical lines at each indentation level
               neocomplete-vim # Keyword completion system
-              neoformat # A (Neo)vim plugin for formatting code.
               nerdcommenter # Comment functions so powerful—no comment necessary
               nerdtree # File system explorer
               nerdtree-git-plugin # Plugin for nerdtree showing git status
@@ -23,7 +23,6 @@
               supertab # Allows you to use <Tab> for all your insert completion
               syntastic # Syntax checking hacks
               vim-addon-nix # Scripts assisting writing .nix files
-              vim-autoformat # Automatically format code
               vim-cue # Cue filetype plugin for Vim
               vim-lastplace
               vim-markdown-toc # Generate table of contents for Markdown files
@@ -88,7 +87,11 @@
             autocmd FileAppendPre   * :call TrimWhiteSpace()
             autocmd FilterWritePre  * :call TrimWhiteSpace()
             autocmd BufWritePre     * :call TrimWhiteSpace()
-            "autocmd BufWrite        * :Autoformat
+
+            augroup FormatAutogroup
+              autocmd!
+              autocmd BufWritePost * silent! FormatWrite
+            augroup END
 
             " FIXME: Currently always set to dark due to issues with Termonad Solarized theme
             " Light during the day, dark during the night
@@ -128,12 +131,6 @@
                 autocmd BufWritePost,FileWritePost    *.gpg   u
             augroup END
 
-            " Use Neoformat to automatically format files
-            augroup fmt
-              autocmd!
-              autocmd BufWritePre * undojoin | Neoformat
-            augroup END
-
             " Manage ISO files
             augroup iso
                 au!
@@ -301,6 +298,33 @@
                 set spell!
             endfunction
             autocmd BufNewFile,BufFilePre,BufRead *.sh :call BashSettings()
+
+            lua <<EOF
+              local treefmt = {
+                function()
+                  return {
+                    exe = "treefmt",
+                    args = {"--stdin", vim.fn.fnameescape(vim.api.nvim_buf_get_name(0))},
+                    stdin = true,
+                  }
+                end
+              }
+              require("formatter").setup({
+                filetype = {
+                  crystal = treefmt,
+                  cue = treefmt,
+                  go = treefmt,
+                  javascript = treefmt,
+                  lua = treefmt,
+                  mint = treefmt,
+                  nix = treefmt,
+                  rego = treefmt,
+                  ruby = treefmt,
+                  rust = treefmt,
+                  vim = treefmt,
+                }
+              })
+            EOF
           '';
         };
       })

treefmt.toml

@@ -0,0 +1,3 @@
+[formatter.nix]
+command = "alejandra"
+includes = ["*.nix"]