From 29bf6c5ca536288b5692157199f28ddab9f4a352 Mon Sep 17 00:00:00 2001
From: Evils <evils.devils@protonmail.com>
Date: Tue, 11 Jul 2023 10:01:16 +0200
Subject: [PATCH] kicad.libraries.packages3d: use stepreduce & stepZ

this makes it buildable by hydra

stepreduce brings down closure size from 5.4G to 3.3G
zip brings it down from 3.3G to 1.6G (or 5.4G to 1.9G without reduce)

xz compressed NAR sizes are:
plain: 373M
gzip: 712M
zip: 712M
stepreduce: 262M
stepreduce & gzip: 465M
stepreduce & zip: 468M
---
 .../science/electronics/kicad/libraries.nix     | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/pkgs/applications/science/electronics/kicad/libraries.nix b/pkgs/applications/science/electronics/kicad/libraries.nix
index 9591cbc31c39..327f77d1c42f 100644
--- a/pkgs/applications/science/electronics/kicad/libraries.nix
+++ b/pkgs/applications/science/electronics/kicad/libraries.nix
@@ -2,6 +2,9 @@
 , cmake
 , gettext
 , libSrc
+, stepreduce
+, parallel
+, zip
 }:
 let
   mkLib = name:
@@ -11,14 +14,20 @@ let
 
       src = libSrc name;
 
-      nativeBuildInputs = [ cmake ];
+      nativeBuildInputs = [ cmake ]
+        ++ lib.optionals (name == "packages3d") [
+          stepreduce
+          parallel
+          zip
+        ];
+
+      postInstall = lib.optional (name == "packages3d") ''
+        find $out -type f -name '*.step' | parallel 'stepreduce {} {} && zip -9 {.}.stpZ {} && rm {}'
+      '';
 
       meta = rec {
         license = lib.licenses.cc-by-sa-40;
         platforms = lib.platforms.all;
-        # the 3d models are a ~1 GiB download and occupy ~5 GiB in store.
-        # this would exceed the hydra output limit
-        hydraPlatforms = if (name == "packages3d") then [ ] else platforms;
       };
     };
 in