Switch to alejandra for formatting

Use treefmt

For context, see upstream PR: https://github.com/divnix/digga/pull/491

modules/core/packages.nix

@@ -1,13 +1,16 @@
-{ config, pkgs, lib, ... }:
-
-with lib;
-let
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}:
+with lib; let
   psCfg = config.pub-solar;
   cfg = config.pub-solar.core;
-in
-{
+in {
   environment = {
-    systemPackages = with pkgs; [
+    systemPackages = with pkgs;
+      [
         # Core unix utility packages
         coreutils-full
         dnsutils
@@ -34,7 +37,6 @@ in
         croc
         jq
       ]
-
       ++ lib.optionals (!cfg.lite) [
         mtr
 
@@ -58,6 +60,7 @@ in
         exfat
 
         # Nix specific utilities
+        alejandra
         niv
         manix
         nix-index

overlays/overrides.nix

@@ -1,25 +1,23 @@
 channels: final: prev: {
-
   __dontExport = true; # overrides clutter up actual creations
 
-  inherit (channels.latest)
+  inherit
+    (channels.latest)
     cachix
     dhall
     discord
     element-desktop
     rage
     nix-index
-    nixpkgs-fmt
     qutebrowser
+    alejandra
     signal-desktop
     starship
     deploy-rs
     nix
-
     tdesktop
     arduino
     arduino-cli
-
     gurk-rs
     thunderbird
     swaynotificationcenter
@@ -32,15 +30,17 @@ channels: final: prev: {
   #inherit (channels.fork)
   #  ;
 
-  haskellPackages = prev.haskellPackages.override
+  haskellPackages =
+    prev.haskellPackages.override
     (old: {
-      overrides = prev.lib.composeExtensions (old.overrides or (_: _: { })) (hfinal: hprev:
-        let version = prev.lib.replaceChars [ "." ] [ "" ] prev.ghc.version;
-        in
-        {
+      overrides = prev.lib.composeExtensions (old.overrides or (_: _: {})) (hfinal: hprev: let
+        version = prev.lib.replaceChars ["."] [""] prev.ghc.version;
+      in {
         # same for haskell packages, matching ghc versions
-          inherit (channels.latest.haskell.packages."ghc${version}")
-            haskell-language-server;
+        inherit
+          (channels.latest.haskell.packages."ghc${version}")
+          haskell-language-server
+          ;
       });
     });
 

shell/devos.nix

@@ -1,14 +1,27 @@
-{ pkgs, extraModulesPath, inputs, lib, ... }:
-let
-
-  inherit (pkgs)
+{
+  pkgs,
+  extraModulesPath,
+  inputs,
+  lib,
+  ...
+}: let
+  inherit
+    (pkgs)
     agenix
     cachix
     editorconfig-checker
     mdbook
     nix
-    nixpkgs-fmt
+    alejandra
     nvfetcher
+    shellcheck
+    shfmt
+    treefmt
+    ;
+
+  inherit
+    (pkgs.nodePackages)
+    prettier
     ;
 
   hooks = import ./hooks;
@@ -17,9 +30,7 @@ let
   devos = pkgWithCategory "devos";
   linter = pkgWithCategory "linter";
   docs = pkgWithCategory "docs";
-
-in
-{
+in {
   _file = toString ./.;
 
   imports = ["${extraModulesPath}/git/hooks.nix"];
@@ -43,7 +54,8 @@ in
     unset _PATH
   '');
 
-  commands = with pkgs; [
+  commands = with pkgs;
+    [
       (devos nix)
       (devos agenix)
       {
@@ -52,8 +64,12 @@ in
         help = pkgs.nvfetcher.meta.description;
         command = "cd $PRJ_ROOT/pkgs; ${pkgs.nvfetcher}/bin/nvfetcher -c ./sources.toml $@";
       }
-    (linter nixpkgs-fmt)
+      (linter alejandra)
       (linter editorconfig-checker)
+      (linter nodePackages.prettier)
+      (linter shfmt)
+      (linter shellcheck)
+      (linter treefmt)
 
       (docs mdbook)
     ]
@@ -63,6 +79,5 @@ in
     ++ lib.optionals (pkgs.stdenv.hostPlatform.isLinux && !pkgs.stdenv.buildPlatform.isDarwin) [
       (devos inputs.nixos-generators.defaultPackage.${pkgs.system})
       (devos deploy-rs)
-  ]
-  ;
+    ];
 }

shell/hooks/pre-commit.sh

@@ -1,43 +1,28 @@
 #!/usr/bin/env bash
 
-if git rev-parse --verify HEAD >/dev/null 2>&1
-then
+if git rev-parse --verify HEAD >/dev/null 2>&1; then
   against=HEAD
 else
   # Initial commit: diff against an empty tree object
-  against=$(git hash-object -t tree /dev/null)
+  against=$(${git}/bin/git hash-object -t tree /dev/null)
 fi
 
 diff="git diff-index --name-only --cached $against --diff-filter d"
 
-mapfile -t nix_files < <($diff -- '*.nix')
-mapfile -t all_files < <($diff)
+all_files=($($diff))
 
-# Format staged nix files
-if (( ${#nix_files[@]} != 0 )); then
-  # Stash only unstaged changes, keeping staged changes
-  old_stash=$(git rev-parse --quiet --verify refs/stash)
-  git stash push --quiet --keep-index -m 'Unstaged changes before pre-commit hook'
-  new_stash=$(git rev-parse --quiet --verify refs/stash)
-
-  # Format staged changes
-  nixpkgs-fmt "${nix_files[@]}" \
-  && git add "${nix_files[@]}"
-
-  # If unstaged changes were stashed re-apply to working tree
-  if [ "$old_stash" != "$new_stash" ]; then
-      git stash pop --quiet
-  fi
-fi
-
-# Check editorconfig
+# Format staged files.
 if ((${#all_files[@]} != 0)); then
-  editorconfig-checker -- "${all_files[@]}"
+  treefmt "${all_files[@]}" &&
+    git add "${all_files[@]}"
 fi
 
-if [[ $? != '0' ]]; then
+# check editorconfig
+if ((${#all_files[@]} != 0)); then
+  if ! editorconfig-checker -- "${all_files[@]}"; then
     printf "%b\n" \
       "\nCode is not aligned with .editorconfig" \
       "Review the output and commit your fixes" >&2
     exit 1
   fi
+fi

treefmt.toml

@@ -0,0 +1,22 @@
+[formatter.nix]
+command = "alejandra"
+includes = ["*.nix"]
+
+[formatter.prettier]
+command = "prettier"
+options = ["--write"]
+includes = [
+  "*.json",
+  "*.yaml",
+  "*.md",
+]
+
+[formatter.shell]
+command = "shfmt"
+options = [
+  "-s",
+  "-w",
+  "-i",
+  "2",
+]
+includes = ["*.sh"]