1 files changed, 73 insertions, 0 deletions
diff --git a/users/Profpatsch/netencode/gen.nix b/users/Profpatsch/netencode/gen.nix
new file mode 100644
index 000000000000..efc9629ca0df
--- /dev/null
+++ b/users/Profpatsch/netencode/gen.nix
@@ -0,0 +1,73 @@
+{ lib }:
+let
+
+  netstring = tag: suffix: s:
+    "${tag}${toString (builtins.stringLength s)}:${s}${suffix}";
+
+  unit = "u,";
+
+  n1 = b: if b then "n1:1," else "n1:0,";
+
+  n = i: n: "n${toString i}:${toString n},";
+  i = i: n: "i${toString i}:${toString n},";
+
+  n3 = n 3;
+  n6 = n 6;
+  n7 = n 7;
+
+  i3 = i 3;
+  i6 = i 6;
+  i7 = i 7;
+
+  text = netstring "t" ",";
+  binary = netstring "b" ",";
+
+  tag = key: val: netstring "<" "|" key + val;
+
+  concatStrings = builtins.concatStringsSep "";
+
+  record = lokv: netstring "{" "}"
+    (concatStrings (map ({ key, val }: tag key val) lokv));
+
+  list = l: netstring "[" "]" (concatStrings l);
+
+  dwim = val:
+    let
+      match = {
+        "bool" = n1;
+        "int" = i6;
+        "string" = text;
+        "set" = attrs:
+          # it could be a derivation, then just return the path
+          if attrs.type or "" == "derivation" then text "${attrs}"
+          else
+            record (lib.mapAttrsToList
+              (k: v: {
+                key = k;
+                val = dwim v;
+              })
+              attrs);
+        "list" = l: list (map dwim l);
+      };
+    in
+    match.${builtins.typeOf val} val;
+
+in
+{
+  inherit
+    unit
+    n1
+    n3
+    n6
+    n7
+    i3
+    i6
+    i7
+    text
+    binary
+    tag
+    record
+    list
+    dwim
+    ;
+}