1 files changed, 27 insertions, 0 deletions

diff --git a/backup-dataset.sh b/backup-dataset.sh
new file mode 100755
index 0000000..e4303c5
--- /dev/null
+++ b/backup-dataset.sh
@@ -0,0 +1,27 @@
+#!/bin/sh -euf
+
+SNAPSHOT_DIRECTORY="/var/backups/dataset-snapshots"
+
+usage() (
+        echo "backup-dataset.sh <dataset> <duplicity destination> [duplicity options]"
+        echo
+        echo "Performs a duplicity incremental backup of the specified dataset."
+        echo "An atomic snapshot of the dataset is taken prior to backing up."
+        echo
+)
+
+backup_dataset() (
+        DATASET="$1"
+        DESTINATION="$2"
+        DUPLICITY_OPTIONS="$3"
+
+        sudo snap.sh snap "$DATASET"
+        PASSPHRASE="null" duplicity $DUPLICITY_OPTIONS "$SNAPSHOT_DIRECTORY/$DATASET" "$DESTINATION"
+        sudo snap.sh free "$DATASET"
+)
+
+case "${1:-help}" in
+        "help") usage;;
+        *)      backup_dataset "$1" "$2" "${3:-}";;
+esac
+