Restic multi-arch wrapper

restic.sh

#!/usr/bin/env bash
# -*- sh -*-
#
# This script runs right restic executable for system where it is called.
# Download restic releases to ../libexec folder and update VERSION valriable.
# It will also set RESTIC_REPOSITORY, based on assumption that the script lies
# in bin folder in the repository.

VERSION="0.9.3"
SYS=$(uname -s | tr '[:upper:]' '[:lower:]')
ARCH=$(uname -m)
case "${ARCH}" in
  "x86_64")
    ARCH="amd64"
    ;;
  "armv7l")
    ARCH="arm"
    ;;
  "armv8")
    ARCH="arm64"
    ;;
  "i386")
    ARCH="386"
    ;;
  "386" | "amd64" | "arm" | "arm64")
    ;;
  *)
    echo "Unsupported architecture ${ARCH}" 1>&2
    exit -1
esac

BASEDIR="$(dirname ${0})/.."
CMD="${BASEDIR}/libexec/restic_${VERSION}_${SYS}_${ARCH}"
export "RESTIC_REPOSITORY=${BASEDIR}"
exec "${CMD}" "${@}"