add patdiff-bin

README.md

@@ -490,6 +490,10 @@ libsystemd implementation in native ocaml: <https://git.lain.faith/haskal/system
 
 the ocaml html docs package from opam
 
+### [`ocamlPackages.patdiff-bin`](./pkgs/ocaml/patdiff-bin)
+
+a repackaged version of `ocamlPackages.patdiff` with a reduced closure size
+
 ### [`python312Packages.feedvalidator` or `feedvalidator`](./pkgs/python/feedvalidator)
 
 the W3C atom/RSS feed validator library, <https://github.com/w3c/feedvalidator>

overlay.nix

@@ -24,6 +24,8 @@ final: prev: {
     systemd-ml = ofinal.callPackage ./pkgs/ocaml/systemd-ml {};
 
     ocaml-manual = ofinal.callPackage ./pkgs/ocaml/ocaml-manual {};
+
+    patdiff-bin = ofinal.callPackage ./pkgs/ocaml/patdiff-bin {};
   });
 
   python312Packages = prev.python312Packages.overrideScope (pfinal: pprev: {

pkgs/ocaml/patdiff-bin/default.nix

@@ -0,0 +1,12 @@
+{
+  runCommand,
+  patdiff,
+}: runCommand "patdiff-bin-${patdiff.version}" {
+  nativeBuildInputs = [];
+  strictDeps = true;
+  meta.mainProgram = "patdiff";
+} ''
+  mkdir -p $out
+  cp -r ${patdiff}/bin $out
+  cp -r ${patdiff}/share $out
+''