SwiftLint script which requires a base version

SwiftLint.sh

#!/bin/sh

BASE_VERSION=0.26.0
SWIFT_LINT_CMD=`which swiftlint`

function version_gt() { test $(printf '%s\n' "$@" | sort --version-sort | head -n 1) != "${1}"; }

if [ ! -f "${SWIFT_LINT_CMD}" ]; then
  echo "warning: SwiftLint not installed. Please install using brew. See: https://github.com/realm/SwiftLint"
else
  SWIFT_LINT_VERSION=`"${SWIFT_LINT_CMD}" version`
  if version_gt ${SWIFT_LINT_VERSION} ${BASE_VERSION}; then
    "${SWIFT_LINT_CMD}" --quiet
  else
    echo "warning: SwiftLint requires a newer version. Please upgrade using brew. See: https://github.com/realm/SwiftLint"
  fi
fi