From f3d6b2ebef9041b89ce6a5ad929425bddb15c863 Mon Sep 17 00:00:00 2001
From: lucasew <lucas59356@gmail.com>
Date: Thu, 5 Sep 2024 17:16:58 -0300
Subject: [PATCH] emilua: add setup hook that populates EMILUA_PATH

Signed-off-by: lucasew <lucas59356@gmail.com>
---
 .../development/interpreters/emilua/default.nix |  7 +++++++
 .../interpreters/emilua/setup-hook.sh           | 17 +++++++++++++++++
 2 files changed, 24 insertions(+)
 create mode 100644 pkgs/development/interpreters/emilua/setup-hook.sh

diff --git a/pkgs/development/interpreters/emilua/default.nix b/pkgs/development/interpreters/emilua/default.nix
index bdacb3a5c087..bb8b22069f86 100644
--- a/pkgs/development/interpreters/emilua/default.nix
+++ b/pkgs/development/interpreters/emilua/default.nix
@@ -110,6 +110,13 @@ stdenv.mkDerivation (self: {
     "--no-suite" "libpsx"
   ];
 
+  postInstall = ''
+    mkdir -p $out/nix-support
+    cp ${./setup-hook.sh} $out/nix-support/setup-hook
+    substituteInPlace $out/nix-support/setup-hook \
+      --replace @sitePackages@ "${self.passthru.sitePackages}"
+  '';
+
   passthru = {
     updateScript = gitUpdater {rev-prefix = "v";};
     inherit boost;
diff --git a/pkgs/development/interpreters/emilua/setup-hook.sh b/pkgs/development/interpreters/emilua/setup-hook.sh
new file mode 100644
index 000000000000..034b52796468
--- /dev/null
+++ b/pkgs/development/interpreters/emilua/setup-hook.sh
@@ -0,0 +1,17 @@
+addEmiluaPath() {
+  addToSearchPathWithCustomDelimiter : EMILUA_PATH $1/@sitePackages@
+}
+
+toEmiluaPath() {
+    local paths="$1"
+    local result=
+    for i in $paths; do
+        p="$i/@sitePackages@"
+        result="${result}${result:+:}$p"
+    done
+    echo $result
+}
+
+if [ -z "${dontAddEmiluaPath:-}" ]; then
+    addEnvHooks "$hostOffset" addEmiluaPath
+fi