Switch to alejandra for nix formatting

I mostly wanted a formatter that would format `inherit` blocks
vertically, because otherwise they are super hard to read when diffing
or even just editing.  Both alejandra and the new nixos/nixfmt format
verically like this, but alejandra has slightly better format (I guess)
and for some reason nixfmt did not respect my `GLOBIGNORE` setting when
doing `nixfmt **/*.nix` so it was trying to format stuff in `_/nix`, and
failed. So anyway I went with alejandra.

- https://github.com/kamadorueda/alejandra
- https://discourse.nixos.org/t/enforcing-nix-formatting-in-nixpkgs/49506

1 files changed, 76 insertions, 33 deletions

diff --git a/Omni/Bild.nix b/Omni/Bild.nix
index fdfa3b8..f36f8f9 100644
--- a/Omni/Bild.nix
+++ b/Omni/Bild.nix
@@ -1,14 +1,24 @@
-{ nixpkgs ? import ./Bild/Nixpkgs.nix }:
-
-let
+{nixpkgs ? import ./Bild/Nixpkgs.nix}: let
   constants = import ./Bild/Constants.nix;
 
   # expose some attrs from stable, keep this minimal and simple
-  stable = let stable = nixpkgs.nixos-24_11;
+  stable = let
+    stable = nixpkgs.nixos-24_11;
   in {
-    inherit (stable)
-      sources lib makeWrapper ccacheStdenv haskell sbcl python312 nixos mkShell
-      dockerTools pkgs;
+    inherit
+      (stable)
+      sources
+      lib
+      makeWrapper
+      ccacheStdenv
+      haskell
+      sbcl
+      python312
+      nixos
+      mkShell
+      dockerTools
+      pkgs
+      ;
     stdenv = stable.ccacheStdenv;
   };
 
@@ -19,13 +29,16 @@ let
   # makeSourcesPath :: [pkgset] -> str
   makeSourcesPath = with stable;
     sources:
-    lib.trivial.pipe sources [
-      (builtins.map lib.attrsets.attrValues)
-      lib.lists.flatten
-      (builtins.filter (pkg: pkg != null))
-      (builtins.map (pkg: if pkg ? src then pkg.src else pkg))
-      (lib.strings.concatStringsSep ":")
-    ];
+      lib.trivial.pipe sources [
+        (builtins.map lib.attrsets.attrValues)
+        lib.lists.flatten
+        (builtins.filter (pkg: pkg != null))
+        (builtins.map (pkg:
+          if pkg ? src
+          then pkg.src
+          else pkg))
+        (lib.strings.concatStringsSep ":")
+      ];
 
   # this is the main library definitions, recursive references can be made with
   # `self.thing`, like in Python objects
@@ -42,7 +55,8 @@ let
 
       # all available packages
       deps = import ./Bild/Deps/Haskell.nix;
-      packages = self.lib.attrsets.getAttrs self.haskell.deps
+      packages =
+        self.lib.attrsets.getAttrs self.haskell.deps
         stable.haskell.packages."${constants.ghcCompiler}";
 
       # make a ghc with dependencies
@@ -78,10 +92,11 @@ let
         ]);
     };
 
-    lisp = { sbclWith = stable.sbcl.withPackages; };
+    lisp = {sbclWith = stable.sbcl.withPackages;};
 
     python = {
-      packages = self.lib.attrsets.getAttrs (import ./Bild/Deps/Python.nix)
+      packages =
+        self.lib.attrsets.getAttrs (import ./Bild/Deps/Python.nix)
         stable.python312.pkgs;
       pythonWith = stable.python312.withPackages;
       buildPythonApplication = stable.python312.pkgs.buildPythonApplication;
@@ -93,9 +108,34 @@ let
 
     # exposed packages for inclusion in builds
     pkgs = with stable.pkgs; {
-      inherit bat bc cmark universal-ctags datasette deadnix fd figlet fzf git
-        git-branchless gitlint groff guile hlint indent jq lolcat mypy nixfmt
-        ormolu pkg-config ripgrep rustc tree wemux;
+      inherit
+        alejandra
+        bat
+        bc
+        cmark
+        universal-ctags
+        datasette
+        deadnix
+        fd
+        figlet
+        fzf
+        git
+        git-branchless
+        gitlint
+        groff
+        guile
+        hlint
+        indent
+        jq
+        lolcat
+        mypy
+        ormolu
+        pkg-config
+        ripgrep
+        rustc
+        tree
+        wemux
+        ;
       llama-cpp = unstable.llama-cpp;
       # can't put this in the dev namespace because it pulls in openai with
       # python311, which conflicts with any other usage of openai with
@@ -124,18 +164,18 @@ let
           ../Omni/Test.hs
         ];
       };
-      nativeBuildInputs = [ self.haskell.ghcPackageSetBild ];
-      buildInputs = [ self.makeWrapper ];
+      nativeBuildInputs = [self.haskell.ghcPackageSetBild];
+      buildInputs = [self.makeWrapper];
       propagatedBuildInputs = with self.pkgs; [
         pkg-config
         git
         # this is just to get access to ghc-pkg in bild
-        (self.haskell.ghcWith (_: [ ]))
+        (self.haskell.ghcWith (_: []))
 
         # lisp deps, remove this when i implement nix builds for lisp
         guile
         (self.lisp.sbclWith
-          (p: with p; [ alexandria ])) # just enough to build Example.lisp
+          (p: with p; [alexandria])) # just enough to build Example.lisp
       ];
       strictDeps = true;
       ghcVersion = self.haskell.ghcVersion;
@@ -158,11 +198,11 @@ let
       installPhase = ''
         wrapProgram $out/bin/bild \
           --prefix PATH : ${
-            self.lib.makeBinPath [
-              self.haskell.ghcPackageSetBild
-              self.pkgs.git
-            ]
-          } \
+          self.lib.makeBinPath [
+            self.haskell.ghcPackageSetBild
+            self.pkgs.git
+          ]
+        } \
           --set GHC_PACKAGE_PATH \
           $out/lib/ghc-$ghcVersion/package.conf.d
       '';
@@ -177,7 +217,8 @@ let
         HOSTNAME = "nix-sandbox";
         # we need to remove the $src root because bild expects paths relative to the
         # working directory:
-        TARGET = "."
+        TARGET =
+          "."
           + self.lib.strings.removePrefix (toString src) (toString target);
         buildPhase = ''
           export CODEROOT=$(pwd)
@@ -242,14 +283,16 @@ let
 
     # build an os image for a digital ocean droplet
     droplet = cfg:
-      (stable.nixos ({ modulesPath, ... }: {
+      (stable.nixos ({modulesPath, ...}: {
         imports = [
           "${toString modulesPath}/virtualisation/digital-ocean-image.nix"
           (_args: cfg)
         ];
-      })).digitalOceanImage;
+      }))
+      .digitalOceanImage;
 
     # build a docker image
     image = stable.dockerTools.buildImage;
   };
-in self
+in
+  self