From 0d1a37eef3e3954cc698b577edbc37eaa736b859 Mon Sep 17 00:00:00 2001
From: Reed Krantz <programming@krantz.one>
Date: Sun, 7 Jun 2026 21:58:16 -0500
Subject: [PATCH] feat: add treefmt to flake root

---
 .rumdl.toml                        |  8 ++++++++
 README.md                          |  2 +-
 flake.nix                          | 10 +++++++++-
 rust-esp32-c6/template/.rumdl.toml |  4 ++--
 rust/default.nix                   | 17 +++++++++++------
 rust/template/.rumdl.toml          |  4 ++--
 6 files changed, 33 insertions(+), 12 deletions(-)
 create mode 100644 .rumdl.toml

diff --git a/.rumdl.toml b/.rumdl.toml
new file mode 100644
index 0000000..606a151
--- /dev/null
+++ b/.rumdl.toml
@@ -0,0 +1,8 @@
+[global]
+disable = [
+  # line length limits
+  "MD013",
+]
+
+[MD057]
+absolute-links = "relative_to_roots"
diff --git a/README.md b/README.md
index f212a74..92ef307 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,3 @@
 # project-templates
 
-Nix flake templates for initializing new projects.
\ No newline at end of file
+Nix flake templates for initializing new projects.
diff --git a/flake.nix b/flake.nix
index f196736..4927704 100644
--- a/flake.nix
+++ b/flake.nix
@@ -36,6 +36,7 @@
         ./rust
         ./rust-esp32-c6
 
+        inputs.treefmt-nix.flakeModule
         flake-parts.flakeModules.flakeModules
         # define the flake.templates option
         ({lib, ...}: {
@@ -57,6 +58,13 @@
 
       systems = ["aarch64-linux" "x86_64-linux" "aarch64-darwin"];
 
-      perSystem = {pkgs, ...}: {formatter = pkgs.alejandra;};
+      perSystem = {pkgs, ...}: {
+        treefmt.programs = {
+          alejandra.enable = true; # nix
+          taplo.enable = true; # toml
+          rumdl-check.enable = true; # markdown
+          rumdl-format.enable = true; # markdown
+        };
+      };
     };
 }
diff --git a/rust-esp32-c6/template/.rumdl.toml b/rust-esp32-c6/template/.rumdl.toml
index caf5b29..606a151 100644
--- a/rust-esp32-c6/template/.rumdl.toml
+++ b/rust-esp32-c6/template/.rumdl.toml
@@ -1,7 +1,7 @@
 [global]
 disable = [
-    # line length limits
-    "MD013",
+  # line length limits
+  "MD013",
 ]
 
 [MD057]
diff --git a/rust/default.nix b/rust/default.nix
index 7388ed9..84b0731 100644
--- a/rust/default.nix
+++ b/rust/default.nix
@@ -44,8 +44,9 @@
         # Build *just* the cargo dependencies, so we can reuse
         # all of that work (e.g. via cachix) when running in CI
         cargoArtifacts = craneLib.buildDepsOnly ({
-          inherit src buildInputs nativeBuildInputs;
-        } // cfg.cargoArtifacts.extraAttrs);
+            inherit src buildInputs nativeBuildInputs;
+          }
+          // cfg.cargoArtifacts.extraAttrs);
       in {
         options.krantz.rust = {
           enable = lib.mkEnableOption "building a cargo project with crane";
@@ -66,7 +67,11 @@
           srcToolchain = lib.mkOption {
             description = "A path to the rust-toolchain(.toml) file for the repo. Will use the toolchain from nixpkgs if the file does not exist.";
             type = lib.types.path;
-            default = "${if cfg.src != null then cfg.src else "/dev/null"}/rust-toolchain.toml";
+            default = "${
+              if cfg.src != null
+              then cfg.src
+              else "/dev/null"
+            }/rust-toolchain.toml";
             defaultText = lib.literalExpression "cfg.src + \"/rust-toolchain.toml\"";
             example = lib.literalExpression "./rust-toolchain";
           };
@@ -192,10 +197,10 @@
           # Your custom packages
           # Accessible through 'nix build', 'nix shell', 'nix run', etc
           packages = lib.mkIf cfg.package.enable {
-            ${cfg.package.name} =
-              craneLib.buildPackage ({
+            ${cfg.package.name} = craneLib.buildPackage ({
                 inherit src buildInputs nativeBuildInputs cargoArtifacts;
-              } // cfg.package.extraAttrs);
+              }
+              // cfg.package.extraAttrs);
           };
 
           # Formatter for nix files, available through 'nix fmt'
diff --git a/rust/template/.rumdl.toml b/rust/template/.rumdl.toml
index caf5b29..606a151 100644
--- a/rust/template/.rumdl.toml
+++ b/rust/template/.rumdl.toml
@@ -1,7 +1,7 @@
 [global]
 disable = [
-    # line length limits
-    "MD013",
+  # line length limits
+  "MD013",
 ]
 
 [MD057]