Add Hujsonfmt formatter (#367)

* Add hujsonfmt formatter

* Update options -> args

* Update hujsonfmt examples, README, maintainer

---------

Co-authored-by: Jonas Chevalier <[email protected]>

Author: fjij

README.md

@@ -221,7 +221,7 @@ functions.
 <!-- `> bash ./supported-programs.sh` -->
 
 <!-- BEGIN mdsh -->
-`treefmt-nix` currently supports 110 formatters:
+`treefmt-nix` currently supports 111 formatters:
 
 * [actionlint](programs/actionlint.nix)
 * [alejandra](programs/alejandra.nix)
@@ -267,6 +267,7 @@ functions.
 * [google-java-format](programs/google-java-format.nix)
 * [hclfmt](programs/hclfmt.nix)
 * [hlint](programs/hlint.nix)
+* [hujsonfmt](programs/hujsonfmt.nix)
 * [isort](programs/isort.nix)
 * [jsonfmt](programs/jsonfmt.nix)
 * [jsonnet-lint](programs/jsonnet-lint.nix)

examples/formatter-hujsonfmt.toml

@@ -0,0 +1,6 @@
+# Example generated by ../examples.sh
+[formatter.hujsonfmt]
+command = "hujsonfmt"
+excludes = []
+includes = ["*.hujson"]
+options = ["-w"]

programs/hujsonfmt.nix

@@ -0,0 +1,12 @@
+{ mkFormatterModule, ... }:
+{
+  meta.maintainers = [ "fjij" ];
+
+  imports = [
+    (mkFormatterModule {
+      name = "hujsonfmt";
+      args = [ "-w" ];
+      includes = [ "*.hujson" ];
+    })
+  ];
+}