#!/usr/bin/env bash
set -eu

version=0.7.0

if ! out="$(shellcheck --version 2>/dev/null)" || [[ "$out" != *"
version: $version
"* ]]; then
    tmpdir="$(mktemp -d)"
    trap 'rm -r "$tmpdir"' EXIT
    cd "$tmpdir"
    wget -nv "https://storage.googleapis.com/shellcheck/shellcheck-v$version.linux.x86_64.tar.xz"
    tar -xJf "shellcheck-v$version.linux.x86_64.tar.xz" --no-same-owner --strip-components=1 -C /usr/local/bin "shellcheck-v$version/shellcheck"
fi