zulip/tools/setup/install-shellcheck

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#!/usr/bin/env bash
set -eu
version=0.7.1
tarball="shellcheck-v$version.linux.x86_64.tar.xz"
sha256=64f17152d96d7ec261ad3086ed42d18232fcb65148b44571b564d688269d36c8
check_version() {
out="$(shellcheck --version 2>/dev/null)" && [[ "$out" = *"
version: $version
"* ]]
}
if ! check_version; then
tmpdir="$(mktemp -d)"
trap 'rm -r "$tmpdir"' EXIT
cd "$tmpdir"
wget -nv "https://github.com/koalaman/shellcheck/releases/download/v$version/$tarball"
sha256sum -c <<<"$sha256 $tarball"
tar -xJf "$tarball" --no-same-owner --strip-components=1 -C /usr/local/bin "shellcheck-v$version/shellcheck"
check_version
fi