feat: html lib

lib/default.nix

@@ -1,4 +1,5 @@
 { lib }:
 lib.makeExtensible (self: {
   pkgBinNoDep = pkgs: name: "${pkgs.${name}}/bin/${name}";
+  html = import ./html.nix { format = true; };
 })

lib/html.nix

@@ -0,0 +1,22 @@
+{ format ? false }:
+let
+  inherit (builtins) isAttrs isList map;
+
+  fmt = if format then "\n  " else "";
+  mapAttrsToList = f: attrs: map (name: f name attrs.${name}) (builtins.attrNames attrs);
+  concatStrings = builtins.concatStringsSep "";
+  genAttrs = f: names: builtins.listToAttrs (map (n: { name = n; value = (f n); }) names);
+
+  evalAttrs = attrs: concatStrings (mapAttrsToList (name: value: " ${name}=\"${value}\"") attrs);
+  evalChildren = children: if isList children then concatStrings children else children;
+  tag = name: maybeAttrs:
+    if isAttrs maybeAttrs
+    then (children: "<${name}${evalAttrs maybeAttrs}>${fmt}${evalChildren children}${fmt}</${name}>")
+    else tag name { } maybeAttrs;
+
+  tags = (genAttrs tag [ "html" "head" "body" "div" "p" "a" ]);
+in
+tags // {
+  inherit tag;
+  link = url: tags.a { href = url; };
+}