nixpkgs/upstart-jobs/filesystems.nix

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{utillinux, fileSystems}:
let
# !!! use XML
mountPoints = map (fs: fs.mountPoint) fileSystems;
devices = map (fs: fs.device) fileSystems;
fsTypes = map (fs: if fs ? fsType then fs.fsType else "auto") fileSystems;
optionss = map (fs: if fs ? options then fs.options else "defaults") fileSystems;
in
{
name = "filesystems";
job = "
start on startup
start on new-devices
script
mountPoints=(${toString mountPoints})
devices=(${toString devices})
fsTypes=(${toString fsTypes})
optionss=(${toString optionss})
for ((n = 0; n < \${#mountPoints[*]}; n++)); do
mountPoint=\${mountPoints[$n]}
device=\${devices[$n]}
fsType=\${fsTypes[$n]}
options=\${optionss[$n]}
# If $device is already mounted somewhere else, unmount it first.
prevMountPoint=$(cat /proc/mounts | grep \"^$device \" | sed 's|^[^ ]\\+ \\+\\([^ ]\\+\\).*|\\1|')
if test \"$prevMountPoint\" = \"$mountPoint\"; then
echo \"remounting $device on $mountPoint\"
${utillinux}/bin/mount -t \"$fsType\" -o remount,\"$options\" \"$device\" \"$mountPoint\" || true
continue
fi
if test -n \"$prevMountPoint\"; then
echo \"unmount $device from $prevMountPoint\"
${utillinux}/bin/umount \"$prevMountPoint\" || true
fi
echo \"mounting $device on $mountPoint\"
mkdir -p \"$mountPoint\" || true
${utillinux}/bin/mount -t \"$fsType\" -o \"$options\" \"$device\" \"$mountPoint\" || true
done
end script
";
}