From 8f60607a0bbd7b6985e626fe65504fdffb13a6c6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jakub=20K=C4=85dzio=C5=82ka?= <kuba@kadziolka.net>
Date: Wed, 16 Sep 2020 22:41:47 +0200
Subject: [PATCH] chez: add env hook

As a follow-up to #97927, chez can now find its libraries in a
nix-shell, and derivations for such libraries don't need to handle the
search path themselves.
---
 pkgs/development/chez-modules/chez-mit/default.nix      | 1 -
 pkgs/development/chez-modules/chez-scmutils/default.nix | 1 -
 pkgs/development/compilers/chez/default.nix             | 2 ++
 pkgs/development/compilers/chez/setup-hook.sh           | 5 +++++
 4 files changed, 7 insertions(+), 2 deletions(-)
 create mode 100644 pkgs/development/compilers/chez/setup-hook.sh

diff --git a/pkgs/development/chez-modules/chez-mit/default.nix b/pkgs/development/chez-modules/chez-mit/default.nix
index 3942195aaa7..63d6ef2c676 100644
--- a/pkgs/development/chez-modules/chez-mit/default.nix
+++ b/pkgs/development/chez-modules/chez-mit/default.nix
@@ -13,7 +13,6 @@ stdenv.mkDerivation {
   buildInputs = [ chez chez-srfi ];
 
   buildPhase = ''
-    export CHEZSCHEMELIBDIRS=${chez-srfi}/lib/csv-site
     make PREFIX=$out CHEZ=${chez}/bin/scheme
   '';
 
diff --git a/pkgs/development/chez-modules/chez-scmutils/default.nix b/pkgs/development/chez-modules/chez-scmutils/default.nix
index cda24f0959a..19fe43da49e 100644
--- a/pkgs/development/chez-modules/chez-scmutils/default.nix
+++ b/pkgs/development/chez-modules/chez-scmutils/default.nix
@@ -13,7 +13,6 @@ stdenv.mkDerivation {
   buildInputs = [ chez chez-srfi chez-mit ];
 
   buildPhase = ''
-    export CHEZSCHEMELIBDIRS=${chez-srfi}/lib/csv-site:${chez-mit}/lib/csv-site
     make PREFIX=$out CHEZ=${chez}/bin/scheme
   '';
 
diff --git a/pkgs/development/compilers/chez/default.nix b/pkgs/development/compilers/chez/default.nix
index 2d2e0df1ec9..864ccc5a743 100644
--- a/pkgs/development/compilers/chez/default.nix
+++ b/pkgs/development/compilers/chez/default.nix
@@ -65,6 +65,8 @@ stdenv.mkDerivation rec {
     rm -rf $out/lib/csv${version}/examples
   '';
 
+  setupHook = ./setup-hook.sh;
+
   meta = {
     description  = "A powerful and incredibly fast R6RS Scheme compiler";
     homepage     = "https://cisco.github.io/ChezScheme/";
diff --git a/pkgs/development/compilers/chez/setup-hook.sh b/pkgs/development/compilers/chez/setup-hook.sh
new file mode 100644
index 00000000000..1d81489bd4e
--- /dev/null
+++ b/pkgs/development/compilers/chez/setup-hook.sh
@@ -0,0 +1,5 @@
+addChezLibraryPath() {
+  addToSearchPath CHEZSCHEMELIBDIRS "$1/lib/csv-site"
+}
+
+addEnvHooks "$targetOffset" addChezLibraryPath