From ad0dc41899cafb8ee8afc73856d3a86ec3fa0240 Mon Sep 17 00:00:00 2001
From: Alex Cruice <alex.cruice@gmail.com>
Date: Mon, 25 May 2015 14:49:44 +1000
Subject: [PATCH] Check shell profile is writeable before modifying

The `set -e` at the top of the script causes the installation to fail to
complete if the shell profile is not writeable. Checking file existence
only is not enough.
---
 scripts/install-nix-from-closure.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/install-nix-from-closure.sh b/scripts/install-nix-from-closure.sh
index 3efe7b384..465cc1013 100644
--- a/scripts/install-nix-from-closure.sh
+++ b/scripts/install-nix-from-closure.sh
@@ -92,7 +92,7 @@ p=$NIX_LINK/etc/profile.d/nix.sh
 added=
 for i in .bash_profile .bash_login .profile; do
     fn="$HOME/$i"
-    if [ -e "$fn" ]; then
+    if [ -w "$fn" ]; then
         if ! grep -q "$p" "$fn"; then
             echo "modifying $fn..." >&2
             echo "if [ -e $p ]; then . $p; fi # added by Nix installer" >> $fn