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| 1 | +#!/usr/bin/env bash |
| 2 | +set -euo pipefail |
| 3 | + |
| 4 | +VERSION=${VERSION:-"v0.11.0"} |
| 5 | +# Expected SHA256 checksums taken from https://github.com/koalaman/shellcheck/releases/tag/v0.11.0 |
| 6 | +# When we change shellcheck versions, these must be changed |
| 7 | +sha256sum_expected_arm="sha256:68a8133197a50beb8803f8d42f9908d1af1c5540d4bb05fdfca8c1fa47decefc" |
| 8 | +sha256sum_expected_amd64="sha256:b7af85e41cc99489dcc21d66c6d5f3685138f06d34651e6d34b42ec6d54fe6f6" |
| 9 | + |
| 10 | +if [ "$(id -u)" -ne 0 ]; then |
| 11 | + echo -e 'Script must be run as root. Use sudo, su, or add "USER root" to your Dockerfile before running this script.' |
| 12 | + exit 1 |
| 13 | +fi |
| 14 | + |
| 15 | +# Checks if packages are installed and installs them if not |
| 16 | +check_packages() { |
| 17 | + if ! dpkg -s "$@" > /dev/null 2>&1; then |
| 18 | + sudo apt-get -y install --no-install-recommends "$@" |
| 19 | + fi |
| 20 | +} |
| 21 | + |
| 22 | +check_packages curl ca-certificates tar |
| 23 | + |
| 24 | +install() { |
| 25 | + tmp_dir="$(mktemp -d)" |
| 26 | + trap 'rm -rf "${tmp_dir}"' EXIT |
| 27 | + |
| 28 | + download_file="${tmp_dir}/shellcheck.tar.gz" |
| 29 | + |
| 30 | + if [ "$TARGETARCH" = "arm64" ] || [ "$TARGETARCH" == "aarch64" ]; then |
| 31 | + download_url="https://github.com/koalaman/shellcheck/releases/download/${VERSION}/shellcheck-${VERSION}.linux.aarch64.tar.xz" |
| 32 | + sha256sum_expected="${sha256sum_expected_arm}" |
| 33 | + else |
| 34 | + download_url="https://github.com/koalaman/shellcheck/releases/download/${VERSION}/shellcheck-${VERSION}.linux.x86_64.tar.gz" |
| 35 | + sha256sum_expected="${sha256sum_expected_amd64}" |
| 36 | + fi |
| 37 | + echo "Downloading shellcheck from ${download_url}..." |
| 38 | + curl -fsSL "${download_url}" -o "${download_file}" |
| 39 | + |
| 40 | + download_file_sha256sum=$(sha256sum "${download_file}" | awk '{print $1}') |
| 41 | + if [ "${download_file_sha256sum}" != "${sha256sum_expected#sha256:}" ]; then |
| 42 | + echo "SHA256 checksum mismatch for downloaded shellcheck archive" |
| 43 | + echo "Expected: ${sha256sum_expected}" |
| 44 | + echo "Actual: sha256:${download_file_sha256sum}" |
| 45 | + exit 1 |
| 46 | + fi |
| 47 | + |
| 48 | + tar -xzf "${download_file}" -C "${tmp_dir}" |
| 49 | + mkdir -p /usr/bin |
| 50 | + mv "${tmp_dir}/shellcheck-${VERSION}/shellcheck" /usr/bin/shellcheck |
| 51 | + chmod +x /usr/bin/shellcheck |
| 52 | +} |
| 53 | +echo "(*) Installing shellcheck..." |
| 54 | + |
| 55 | +install |
| 56 | + |
| 57 | +echo "Done!" |
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