From 9e45c4ce64ab09f7b3f2e468e65666dda3334b88 Mon Sep 17 00:00:00 2001
From: Pol Dellaiera <pol.dellaiera@protonmail.com>
Date: Wed, 18 Dec 2024 18:02:37 +0100
Subject: [PATCH] build-support: add `writableTmpDirAsHomeHook` hook

---
 .../setup-hooks/writable-tmpdir-as-home.sh         | 14 ++++++++++++++
 pkgs/top-level/all-packages.nix                    |  7 +++++++
 2 files changed, 21 insertions(+)
 create mode 100644 pkgs/build-support/setup-hooks/writable-tmpdir-as-home.sh

diff --git a/pkgs/build-support/setup-hooks/writable-tmpdir-as-home.sh b/pkgs/build-support/setup-hooks/writable-tmpdir-as-home.sh
new file mode 100644
index 00000000000000..4fcd874b241687
--- /dev/null
+++ b/pkgs/build-support/setup-hooks/writable-tmpdir-as-home.sh
@@ -0,0 +1,14 @@
+# shellcheck shell=bash
+# This setup hook set the HOME environment variable to a temporary directory.
+
+export HOME
+
+writableTmpDirAsHome () {
+    if [[ ! -w "$HOME" ]]; then
+        HOME=$(mktemp -d)
+        export HOME
+    fi
+}
+
+# shellcheck disable=SC2154
+addEnvHooks "$targetOffset" writableTmpDirAsHome
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index f1f651ce65d14c..3afcb3abecea46 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -866,6 +866,13 @@ with pkgs;
     name = "setup-debug-info-dirs-hook";
   } ../build-support/setup-hooks/setup-debug-info-dirs.sh;
 
+  writableTmpDirAsHomeHook = callPackage (
+    { makeSetupHook }:
+    makeSetupHook {
+      name = "writable-tmpdir-as-home-hook";
+    } ../build-support/setup-hooks/writable-tmpdir-as-home.sh
+  ) { };
+
   useOldCXXAbi = makeSetupHook {
     name = "use-old-cxx-abi-hook";
   } ../build-support/setup-hooks/use-old-cxx-abi.sh;