archive

#!/usr/bin/env bash
#*******************************************************************************
# Copyright (c) 2020 Eclipse Foundation and others.
# This program and the accompanying materials are made available
# under the terms of the Eclipse Public License 2.0
# which is available at http://www.eclipse.org/legal/epl-v20.html,
# or the MIT License which is available at https://opensource.org/licenses/MIT.
# SPDX-License-Identifier: EPL-2.0 OR MIT
#*******************************************************************************

BTWD="$(dirname "$(readlink -f "${BASH_SOURCE[0]}")")"
# shellcheck disable=SC1090
. "${BTWD}/_bootstrap.shsource"

expand() {
  local file="${1}"
  local target="${2:-.}"
  local strip="${3:-}"
  mkdir -p "${target}"
  if [[ $(file --mime-type -b "${file}") = "application/x-gzip" ]] || [[ $(file --mime-type -b "${file}") = "application/gzip" ]]; then
    tar zxf "${file}" ${strip:+"--strip-components=1"} -C "${target}" 
  elif [[ $(file --mime-type -b "${file}") = "application/zip" ]]; then
    if [[ -z "${strip:-}" ]]; then
      unzip -q -d "${target}" "${file}"
    else
      _unzip_strip "${file}" "${target}"
    fi
  else
    ERROR "unknown archive type %s" "$(realpath --relative-to="$(pwd)" "$(file --mime-type "${file}")")"
    return 1
  fi
}

_unzip_strip() {
  local zip="${1}"
  local dest="${2:-.}"
  local temp
  temp=$(mktemp -d) 
  unzip -q -d "${temp}" "${zip}" 
  mkdir -p "${dest}"
  shopt -s dotglob
  local f=("${temp}"/*)
  if [[ ${#f[@]} -eq 1 ]] && [[ -d "${f[0]}" ]] ; then
    mv "${temp}"/*/* "${dest}"
  else
    mv "${temp}"/* "${dest}"
  fi 
  rmdir "${temp}"/* "${temp}"
}