From 46d56223ae575430e936e47150b280f8a7e81e40 Mon Sep 17 00:00:00 2001
From: redxef <federanko.manuel@gmail.com>
Date: Sun, 16 Aug 2020 16:29:59 +0200
Subject: [PATCH] Init commit.

---
 dvbackup.sh | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100755 dvbackup.sh

diff --git a/dvbackup.sh b/dvbackup.sh
new file mode 100755
index 0000000..58252a9
--- /dev/null
+++ b/dvbackup.sh
@@ -0,0 +1,50 @@
+#!/usr/bin/env bash
+
+backup() {
+    local volume
+    local target
+    local target_dir
+    local target_name
+    volume="$1"
+    target="$(realpath "$2")"
+    target_dir="$(dirname "$target")"
+    target_name="$(basename "$target")"
+
+    test -z "$(docker volume ls | grep "$volume")" && { echo "Error: No such volume, aborting" >&2; exit 1; }
+    test -z "$target_dir" && { echo "Error: No base folder found for target=$target" >&2; exit 2; }
+    test -z "$target_name" && { echo "Error: No target name found for target=$target" >&2; exit 3; }
+
+    set -x
+    docker run --rm --user="$(id -u):$(id -g)" --mount="type=volume,source=$volume,destination=/data,ro=true" --mount="type=bind,source=$target_dir,destination=/data2" busybox tar cvf "/data2/$target_name" "/data"
+    set +x
+}
+
+restore() {
+    local volume
+    local target
+    local target_dir
+    local target_name
+    target="$(realpath "$1")"
+    target_dir="$(dirname "$target")"
+    target_name="$(basename "$target")"
+    volume="$2"
+
+    test -z "$(docker volume ls | grep "$volume")" && { echo "Error: No such volume, aborting" >&2; exit 1; }
+    test -z "$target_dir" && { echo "Error: No base folder found for target=$target" >&2; exit 2; }
+    test -z "$target_name" && { echo "Error: No target name found for target=$target" >&2; exit 3; }
+
+    set -x
+    docker run --rm --user="$(id -u):$(id -g)" --mount="type=volume,source=$volume,destination=/data" --mount="type=bind,source=$target_dir,destination=/data2" busybox /bin/sh -c "rm -rf /data/* && cd / && tar xvf '/data2/$target_name'"
+    set +x
+}
+
+main() {
+    local volumes
+    volumes="$(docker volume ls | tail -n+2 | egrep -v '[a-z]+\s+[0-9a-f]+' | egrep -o '\s.+$' | sed 's/\s//g')"
+    while read -r line; do
+        echo "$line -> $line.tar"
+        backup "$line" "$line.tar"
+    done <<< "$volumes"
+}
+
+"$@"