more generic backend selection, added borgbackup backend

1 files changed, 66 insertions, 0 deletions

diff --git a/backends/borg.sh b/backends/borg.sh
new file mode 100644
index 0000000..d3d9c63
--- /dev/null
+++ b/backends/borg.sh
@@ -0,0 +1,66 @@
+function borg_init() {
+    export BORG_PASSCOMMAND="$BACKUP_PASSCOMMAND"
+    for BACKUP_DIR in ${BACKUP_DIRS[*]}
+    do
+        # borg will check if repo exists
+        borg init --encryption=repokey-blake2 "$BACKUP_DIR"
+    done
+}
+
+function borg_create_backup() {
+    export BORG_PASSCOMMAND="$BACKUP_PASSCOMMAND"
+    RETCODE=255
+    for BACKUP_DIR in ${BACKUP_DIRS[*]}
+    do
+        export BORG_REPO="$BACKUP_DIR"
+
+        trap 'echo $( date ) Backup interrupted >&2; exit 2' INT TERM
+
+        echo "borg: starting backup to \"$BACKUP_DIR\""
+
+        borg create                         \
+            "${BACKUP_DIR}::${BACKUP_NAME}_{hostname}_{now}" \
+            "$WORLD_NAME"               \
+            --filter AME                    \
+            --compression lz4               \
+            --exclude-caches                \
+
+            backup_exit=$?
+
+        echo "borg: pruning repository at \"$BACKUP_DIR\""
+
+        borg prune                          \
+            --prefix '{hostname}-'          \
+            --keep-minutely 2               \
+            --keep-hourly   24              \
+            --keep-daily    7               \
+            --keep-weekly   4               \
+            --keep-monthly  6               \
+            "$BACKUP_DIR"
+
+        prune_exit=$?
+
+        # use highest exit code as global exit code
+        global_exit=$(( backup_exit > prune_exit ? backup_exit : prune_exit ))
+        RETCODE=$(( global_exit > RETCODE ? global_exit : RETCODE ))
+
+        if [ ${global_exit} -eq 0 ]; then
+            echo "borg: backup and prune finished successfully"
+        elif [ ${global_exit} -eq 1 ]; then
+            echo "borg: backup and/or prune finished with warnings"
+        else
+            echo "borg: backup and/or prune finished with errors"
+        fi
+        #exit ${global_exit}
+    done
+    return $RETCODE
+}
+
+function borg_ls() {
+    export BORG_PASSCOMMAND="$BACKUP_PASSCOMMAND"
+    for BACKUP_DIR in ${BACKUP_DIRS[*]}
+    do
+        echo "borg: backups in \"$BACKUP_DIR\":"
+        borg list "$BACKUP_DIR"
+    done
+}