From 107a37f52740bfa6ae8378efae4391fdbc7039cf Mon Sep 17 00:00:00 2001
From: lassulus <lassulus@lassul.us>
Date: Tue, 31 Jul 2018 22:17:39 +0200
Subject: lib.mount.filesystem: don't mount if already mounted

---
 lib/default.nix | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/lib/default.nix b/lib/default.nix
index c6234e0..54bcf24 100644
--- a/lib/default.nix
+++ b/lib/default.nix
@@ -82,8 +82,10 @@ let {
 
   mount.filesystem = q: x: {
       fs.${x.mountpoint} = ''
-        mkdir -p ${x.mountpoint}
-        mount ${q.device} ${x.mountpoint}
+        if ! [ "$(mount | sed -n 's:\([^ ]\+\) on ${x.mountpoint} .*:\1:p')" = ${q.device} ]; then
+          mkdir -p ${x.mountpoint}
+          mount ${q.device} ${x.mountpoint}
+        fi
       '';
     };
 
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