common.shrc

# Check passed environment variables names are set
function common.check.var() {
  local rc=0

  local env_var=''
  for env_var in "$@"; do
    local env_value="${!env_var}"
    if [[ ! -z "${env_value}" ]]; then
      echo "[INFO ] '${env_var}' = '${env_value}'"
    else
      echo "[ERROR] Missing environment variable '${env_var}'" >&2
      rc=1
    fi
  done

  return $rc
}

# Check passed command exists
function common.check.bin() {
  local rc=0

  local command=''
  for command in "$@"; do
    type -t "${command}" >/dev/null 2>&1 || {
      echo "[ERROR] Missing command '${command}'"
      rc=1
    } >&2
  done

  return $rc
}

# Check passed files exists and can be executed
function common.check.exe() {
  local rc=0

  local file=''
  for file in "$@"; do
    [[ -f "${file}" ]] || {
      echo "[ERROR] Missing file '${file}'"
      rc=1
      continue
    } >&2
    [[ -x "${file}" ]] || {
      echo "[ERROR] Missing execute permission on file '${file}'"
      rc=1
      continue
    } >&2
  done

  return $rc
}