root: setup nix

monorepo-revid: f83eede55beb9a636ce34eead83d4d5fce288b51

4 files changed, 57 insertions, 0 deletions

diff --git a/root/nix/_treefmt-base.nix b/root/nix/_treefmt-base.nix
new file mode 100644
index 0000000..d613092
--- /dev/null
+++ b/root/nix/_treefmt-base.nix
@@ -0,0 +1,17 @@
+/**
+  The base treefmt configuration that all projects should import
+  from. This will include a consistent configuration for most, if not all,
+  formatters/linters. This will NOT enable the formatters/linters except
+  for a few that are used across all projects (nixfmt, typos etc.).
+*/
+{
+  projectRootFile = "README.md";
+
+  programs = {
+    # keep-sorted start block=yes
+    keep-sorted.enable = true;
+    nixfmt.enable = true;
+    typos.enable = true;
+    # keep-sorted end
+  };
+}
diff --git a/root/nix/_treefmt.nix b/root/nix/_treefmt.nix
new file mode 100644
index 0000000..8cd6d6d
--- /dev/null
+++ b/root/nix/_treefmt.nix
@@ -0,0 +1,7 @@
+{ treefmt-nix, pkgs, ... }:
+let
+  conf = {
+    imports = [ ./_treefmt-base.nix ];
+  };
+in
+treefmt-nix.lib.mkWrapper pkgs conf
diff --git a/root/nix/devshell.nix b/root/nix/devshell.nix
new file mode 100644
index 0000000..6c1dc29
--- /dev/null
+++ b/root/nix/devshell.nix
@@ -0,0 +1,30 @@
+{ inputs, self, ... }:
+{
+  perSystem =
+    { pkgs, system, ... }:
+    {
+      devShells.common = pkgs.mkShellNoCC {
+        name = "common";
+
+        packages = [
+          pkgs.nixd
+        ];
+      };
+
+      devShells.root =
+        let
+          treefmt = pkgs.callPackage ./_treefmt.nix { treefmt-nix = inputs.treefmt-nix; };
+        in
+        pkgs.mkShellNoCC {
+          name = "root";
+
+          inputsFrom = [ self.devShells."${system}".common ];
+          packages = [
+            treefmt
+          ];
+          shellHook = ''
+            export TREEFMT_WORKING_DIR="$("${pkgs.git}/bin/git" rev-parse --show-toplevel)"
+          '';
+        };
+    };
+}
diff --git a/root/nix/systems.nix b/root/nix/systems.nix
new file mode 100644
index 0000000..ce708c6
--- /dev/null
+++ b/root/nix/systems.nix
@@ -0,0 +1,3 @@
+{
+  systems = [ "x86_64-linux" ];
+}