X-Git-Url: https://ruderich.org/simon/gitweb/?a=blobdiff_plain;f=bin%2Fsrsync-incremental;h=0ae1e56c208e562b839628862e11ab32bb2fcc19;hb=f48bb5f7372a847a0cd1d5cb2ac3edbea74243f2;hp=a76bf728ec76992f06b2576500ae61494ccda9d3;hpb=94961a22c468a56a53158dea7b68ebdbe6b9ac06;p=config%2Fdotfiles.git

diff --git a/bin/srsync-incremental b/bin/srsync-incremental
index a76bf72..0ae1e56 100755
--- a/bin/srsync-incremental
+++ b/bin/srsync-incremental
@@ -5,7 +5,7 @@
 # Thanks to http://www.sanitarium.net/golug/rsync_backups_2010.html for the
 # idea.
 
-# Copyright (C) 2011-2012  Simon Ruderich
+# Copyright (C) 2011-2014  Simon Ruderich
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -21,32 +21,44 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 
-if [ $# -lt 2 ]; then
+set -eu
+
+if test "$#" -lt 2; then
     echo "Usage: $0 <backups-directory> <arguments to rsync>" >&2
     echo
     echo "Note: The target directory is the _first_ argument!" >&2
     exit 2
 fi
 
-cd "$1" || exit 1
+
+cd "$1"
 shift
 
-dest=`echo backup-*`
-if [ "x$dest" != 'xbackup-*' ]; then
-    dest="`pwd`/`ls -1d backup-* | tail -n1`"
-fi
+# Get absolute path to last backup directory.
+for x in backup-*; do
+    test -d "$x" || continue
+    dest="../$x" # relative to destination directory
+done
 
 target=backup-`date '+%Y-%m-%d-%H-%M-%S'`
 
-if [ -d current ]; then
+if test -d current; then
     echo "Target directory 'current' already exists, aborting." >&2
     exit 1
 fi
 
 mkdir current
 rsync \
-    --verbose --human-readable \
-    --archive --hard-links --numeric-ids --one-file-system \
+    --verbose --itemize-changes --human-readable \
+    --archive --hard-links --sparse --numeric-ids --one-file-system \
     --link-dest="$dest" \
     "$@" current \
-&& mv current "$target"
+|| {
+    # Try to remove "current" without changing the exit code. In case the
+    # connection failed without transferring any files, we want the next
+    # backup to be able to run.
+    code=$?
+    rmdir current 2>/dev/null || true
+    exit $code
+}
+mv current "$target"