2 files changed, 27 insertions, 22 deletions
diff --git a/pkgs/btclone/btclone.nix b/pkgs/btclone/btclone.nix
index 6b8e809..68673a7 100755
--- a/pkgs/btclone/btclone.nix
+++ b/pkgs/btclone/btclone.nix
@@ -1,13 +1,13 @@
 ''
   usage() { echo "Usage: $0 <subvolume> <target> [<up-to>]" >&2; exit 1; }
-  
+
   [[ $# -ge 2 && $# -le 3 && ( $# -ne 3 || $(("$3" + 0)) = "$3" ) ]] || usage
   [[ $UID -eq 0 ]] || { echo "$0: requires root privileges" >&2; exit 1; }
-  
+
   SOURCE="$1"
   TARGET="$2"
   [ $# -ge 3 ] && UP_TO="$3" || UP_TO=
-  
+
   get_snapshots() {
       FILTER="\$1 > 0"
       [[ -n "$UP_TO" ]] && FILTER="\$1 > 0 && \$1 <= $UP_TO"
@@ -15,7 +15,7 @@
       find "$1" -follow -maxdepth 1 -printf '%f\n' \
           | sed 's@/$@@g' | awk "$FILTER { print }" | sort -n
   }
-  
+
   clone() {
       if [[ -n "$2" ]]; then
           echo "Cloning $1 (incremental from $2)..." >&2
@@ -24,44 +24,44 @@
           echo "Cloning $1 (non-incremental)..." >&2
           PARENT_ARG="--"
       fi
-  
+
       FROM="$SOURCE/$1"
       INTO="$TARGET/$1"
-  
+
       [[ -d "$INTO" ]] || mkdir "$INTO"
       btrfs send "$PARENT_ARG" "$FROM/snapshot" | pv | btrfs receive "$INTO"
       cp -a "$FROM/info.xml" "$INTO/"
   }
-  
+
   cleanup() {
       echo "Removing $1..." >&2
-  
+
       AT="$TARGET/$1"
       [[ -d "$AT/snapshot" ]] && btrfs subvolume delete "$AT/snapshot"
       rm -f "$AT/info.xml"
       rmdir "$AT"
   }
-  
+
   while true; do
       ls -- "$SOURCE/" "$TARGET/" >/dev/null
       mapfile -t SNAPSHOTS < <(get_snapshots "$SOURCE")
       [[ ''${#SNAPSHOTS} -eq 0 ]] && { echo "$0: nothing to do" >&2; exit; }
       mapfile -t EXISTENT < <(get_snapshots "$TARGET")
-  
+
       RESET=0
       PARENT=
       ALL_ARE_BAD=0
       for SNAPSHOT in "''${SNAPSHOTS[@]}"; do
           if [[ ! -e "$SOURCE/$SNAPSHOT" ]]; then
               echo "Notice: resetting listings due to time lapse" >&2
-  
+
               RESET=1
               break
           elif [[ ! -s "$SOURCE/$SNAPSHOT/info.xml" ]]; then
               echo "Warning: skipping source $SNAPSHOT due to invalid info.xml" >&2
               continue
           fi
-  
+
           CLONE=0
           if [[ ! -e "$TARGET/$SNAPSHOT" ]]; then
               CLONE=1
@@ -69,25 +69,25 @@
               echo -n "Warning: bad copy $SNAPSHOT (" >&2
               [[ $ALL_ARE_BAD -eq 1 ]] && echo -n "bad chain" >&2 || echo -n "incomplete" >&2
               echo "), recreating..." >&2
-  
+
               cleanup "$SNAPSHOT"
-  
+
               CLONE=1
               ALL_ARE_BAD=1
           fi
-  
+
           if [[ $CLONE -eq 1 ]]; then
               clone "$SNAPSHOT" "$PARENT"
           elif [[ -z "$PARENT" ]]; then
               echo "Initial snapshot present, all copies will be incremental" >&2
           fi
-  
+
           chmod 750 "$TARGET/$SNAPSHOT"
           PARENT="$SNAPSHOT"
       done
-  
+
       [[ $RESET -eq 1 ]] && continue
-  
+
       echo "Copies updated, cleaning up..." >&2
       for SNAPSHOT in "''${EXISTENT[@]}"; do
           FOUND=""
@@ -100,9 +100,9 @@
 
           [ -n "$FOUND" ] || cleanup "$SNAPSHOT"
       done
-  
+
       break
   done
-  
+
   echo "Done" >&2
 ''
diff --git a/pkgs/btclone/default.nix b/pkgs/btclone/default.nix
index bb207ef..2484f33 100644
--- a/pkgs/btclone/default.nix
+++ b/pkgs/btclone/default.nix
@@ -1,6 +1,11 @@
-{ btrfs-progs, pv, writeShellApplication, ... }:
+{
+  btrfs-progs,
+  pv,
+  writeShellApplication,
+  ...
+}:
 writeShellApplication {
   name = "btclone";
-  runtimeInputs = [ btrfs-progs pv ];
+  runtimeInputs = [btrfs-progs pv];
   text = import ./btclone.nix;
 }