From 6d280e9543e506018018f76850a2b64afbde8381 Mon Sep 17 00:00:00 2001
From: Robert Helgesson <robert@rycee.net>
Date: Wed, 4 Oct 2023 00:07:05 +0200
Subject: [PATCH] home-manager: fix assignment to read-only variable

Fixes #4519

(cherry picked from commit e63c30fe9792b57dea1eab98be6871a0e42a33c9)
---
 home-manager/home-manager | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/home-manager/home-manager b/home-manager/home-manager
index e41e4b4b..4f3380ac 100644
--- a/home-manager/home-manager
+++ b/home-manager/home-manager
@@ -127,6 +127,11 @@ function setHomeManagerNixPath() {
 
 # Sets some useful Home Manager related paths as global read-only variables.
 function setHomeManagerPathVariables() {
+    # If called twice then just exit early.
+    if [[ -v HM_DATA_HOME ]]; then
+        return
+    fi
+
     declare -r globalNixStateDir="${NIX_STATE_DIR:-/nix/var/nix}"
     declare -r globalProfilesDir="$globalNixStateDir/profiles/per-user/$USER"
     declare -r globalGcrootsDir="$globalNixStateDir/gcroots/per-user/$USER"