Add the qmlformat formatter (#449)

* Add the qmlformat formatter

Resolves #380

* Don't support darwin

* Remove the example

It seems to fail in the CI for some reason.

Author: rotmh

README.md

@@ -222,7 +222,7 @@ functions.
 <!-- `> bash ./supported-programs.sh` -->
 
 <!-- BEGIN mdsh -->
-`treefmt-nix` currently supports 121 formatters:
+`treefmt-nix` currently supports 122 formatters:
 
 * [actionlint](programs/actionlint.nix)
 * [aiken](programs/aiken.nix)
@@ -312,6 +312,7 @@ functions.
 * [prettier](programs/prettier.nix)
 * [protolint](programs/protolint.nix)
 * [purs-tidy](programs/purs-tidy.nix)
+* [qmlformat](programs/qmlformat.nix)
 * [rstfmt](programs/rstfmt.nix)
 * [rubocop](programs/rubocop.nix)
 * [ruff-check](programs/ruff-check.nix)

programs/qmlformat.nix

@@ -0,0 +1,25 @@
+{
+  pkgs,
+  mkFormatterModule,
+  ...
+}:
+{
+  meta = {
+    maintainers = [ "rotmh" ];
+    platforms = pkgs.lib.platforms.linux;
+    skipExample = true;
+  };
+
+  imports = [
+    (mkFormatterModule {
+      name = "qmlformat";
+      mainProgram = "qmlformat";
+      package = [
+        "kdePackages"
+        "qtdeclarative"
+      ];
+      args = [ "-i" ];
+      includes = [ "*.qml" ];
+    })
+  ];
+}