From db322f2d095e14d501b34e82c6acd3ab0ece03e0 Mon Sep 17 00:00:00 2001
From: nachoparker <nacho@ownyourbits.com>
Date: Wed, 10 Jan 2018 14:31:55 +0100
Subject: nc-swapfile: improved, and take BTRFS into account

---
 bin/ncp-diag                            |  1 +
 etc/nextcloudpi-config.d/nc-swapfile.sh | 25 +++++++++++++++++++------
 2 files changed, 20 insertions(+), 6 deletions(-)

diff --git a/bin/ncp-diag b/bin/ncp-diag
index 6289fb98..e58afe72 100755
--- a/bin/ncp-diag
+++ b/bin/ncp-diag
@@ -32,6 +32,7 @@ echo "datadir|$DATADIR$DIRINFO"
   echo "data disk usage|$( df -h "$DATADIR" | tail -1 | awk '{ print $3"/"$2 }')"
 }
 echo "rootfs usage|$( df -h / | tail -1 | awk '{ print $3"/"$2 }')"
+echo "swapfile|$( swapon | tail -1 | awk '{ print $1 }' )"
 
 # Nextcloud
 VERSION="$( sudo -u www-data php /var/www/nextcloud/occ status | grep "version:" | awk '{ print $3 }' )"
diff --git a/etc/nextcloudpi-config.d/nc-swapfile.sh b/etc/nextcloudpi-config.d/nc-swapfile.sh
index cd0a23fb..7587847b 100644
--- a/etc/nextcloudpi-config.d/nc-swapfile.sh
+++ b/etc/nextcloudpi-config.d/nc-swapfile.sh
@@ -26,21 +26,34 @@ is_active()
 
 configure()
 {
-  local ORIG=$( grep -oP "CONF_SWAPFILE=.*" /etc/dphys-swapfile | cut -f2 -d= )
-  [[ "$ORIG" == "$SWAPFILE_" ]] && return
-  test -d "$SWAPFILE_" && { echo "$SWAPFILE_ is a directory. Abort"; return 1; }
+  local ORIG="$( swapon | tail -1 | awk '{ print $1 }' )"
+  local DSTDIR="$( dirname "$SWAPFILE_" )"
+  [[ "$ORIG" == "$SWAPFILE_" ]] && { echo "nothing to do";                    return 0; }
+  [[ -d "$SWAPFILE_"         ]] && { echo "$SWAPFILE_ is a directory. Abort"; return 1; }
+  [[ -d "$DSTDIR"            ]] || { echo "$DSTDIR Doesn't exist. Abort";     return 1; }
 
-  [[ $( stat -fc%d / ) == $( stat -fc%d $( dirname "$SWAPFILE_" ) ) ]] && \
+  [[ "$( stat -fc%T "$DSTDIR" )" == "btrfs" ]] && {
+    echo "BTRFS doesn't support swapfiles"
+    return 1
+  }
+
+  [[ $( stat -fc%d / ) == $( stat -fc%d "$DSTDIR" ) ]] && \
     echo -e "INFO: moving swapfile to another place in the same SD card\nIf you want to use an external mount, make sure it is properly set up"
 
   sed -i "s|#\?CONF_SWAPFILE=.*|CONF_SWAPFILE=$SWAPFILE_|" /etc/dphys-swapfile
   sed -i "s|#\?CONF_SWAPSIZE=.*|CONF_SWAPSIZE=$SWAPSIZE_|" /etc/dphys-swapfile
-  grep -q vm.swappiness /etc/sysctl.conf || echo "vm.swappiness = 10" >> /etc/sysctl.conf && sysctl --load
+  grep -q vm.swappiness /etc/sysctl.conf || echo "vm.swappiness = 10" >> /etc/sysctl.conf && sysctl --load &>/dev/null
 
   # workaround for automount, systemd doesn't get the order right
   grep -q sleep /etc/init.d/dphys-swapfile || sed -i "/\<start)/asleep 15" /etc/init.d/dphys-swapfile
 
-  service dphys-swapfile restart && swapoff "$ORIG" && rm -f "$ORIG"
+  dphys-swapfile setup && dphys-swapfile swapon && {
+    [[ -f "$ORIG" ]] && swapoff "$ORIG" && rm -f "$ORIG"
+    echo "swapfile moved successfully"
+    return 0
+  }
+  echo "moving swapfile failed"
+  return 1
 }
 
 install() { :; }
-- 
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