uback-tar-src

#!/bin/bash

set -e

read_json_array() {
	local input="$1"
	local -n result=$2
	result=()
	if [ "$input" != "" ] ; then
		while read item; do
			result+=("$item")
		done <<<"$(<<<"$input" jq -r '.[]')"
	fi
}

if [ "$1" != "source" ] ; then
  echo "Invalid kind" >&2
  exit 1
fi

case "$2" in
  type)
    echo "command:uback-tar-src"
    if [ "$UBACK_OPT_SNAPSHOTS_PATH" = "" ] ; then
      echo "Missing option: SnapshotsPath" >&2
      exit 1
    fi
    if [ "$UBACK_OPT_PATH" = "" ] ; then
      echo "Missing option: Path" >&2
      exit 1
    fi
    ;;
  list-snapshots)
    mkdir -p -- "$UBACK_OPT_SNAPSHOTS_PATH"
    ls -- "$UBACK_OPT_SNAPSHOTS_PATH"
    ;;
  remove-snapshot)
    mkdir -p -- "$UBACK_OPT_SNAPSHOTS_PATH"
    rm -f -- "$UBACK_OPT_SNAPSHOTS_PATH/$3"
    ;;
  create-backup)
    ns=$(date -u +%N)
    snapshot=$(date -u +%Y%m%dT%H%M%S.)${ns:0:3}
    mkdir -p -- "$UBACK_OPT_SNAPSHOTS_PATH"
    if [ "$3" != "" ] && [ -f "$UBACK_OPT_SNAPSHOTS_PATH/$3" ] ; then
      echo "${snapshot}-from-$3"
      cp -a -- "$UBACK_OPT_SNAPSHOTS_PATH/$3" "$UBACK_OPT_SNAPSHOTS_PATH/_tmp-${snapshot}"
    else
      echo "${snapshot}-full"
    fi
    read_json_array "$UBACK_SOPT_EXTRA_ARGS" extra_args
    tar --create -C "$UBACK_OPT_PATH" --listed-incremental="$UBACK_OPT_SNAPSHOTS_PATH/_tmp-${snapshot}" "${extra_args[@]}" .
    mv -- "$UBACK_OPT_SNAPSHOTS_PATH/_tmp-${snapshot}" "$UBACK_OPT_SNAPSHOTS_PATH/${snapshot}"
    ;;
  restore-backup)
    target="$3"
    snapshot="$4"
    base="$5"
    if [ "$base" != "" ] ; then
      mv -- "$target/$base" "$target/$snapshot"
    else
      mkdir -p -- "$target/$snapshot"
    fi
    tar -x -C "$target/$snapshot"
    ;;
  *)
    echo "Invalid operation: $2" >&2
    exit 1
esac

exit 0