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| 1 | +#!/usr/bin/env bash |
| 2 | +set -euo pipefail |
| 3 | + |
| 4 | +REPO="${ARBITER_INSTALL_REPO:-yajasmalhotra/arbiter}" |
| 5 | +VERSION_INPUT="${ARBITER_VERSION:-latest}" |
| 6 | +INSTALL_DIR="${ARBITER_INSTALL_DIR:-}" |
| 7 | + |
| 8 | +usage() { |
| 9 | + cat <<'EOF' |
| 10 | +Usage: install.sh [--version <semver>] [--install-dir <path>] |
| 11 | +
|
| 12 | +Environment variables: |
| 13 | + ARBITER_VERSION Version without leading v (default: latest release) |
| 14 | + ARBITER_INSTALL_DIR Install directory override |
| 15 | + ARBITER_INSTALL_REPO GitHub repo owner/name (default: yajasmalhotra/arbiter) |
| 16 | +EOF |
| 17 | +} |
| 18 | + |
| 19 | +while [[ $# -gt 0 ]]; do |
| 20 | + case "$1" in |
| 21 | + --version) |
| 22 | + VERSION_INPUT="${2:-}" |
| 23 | + shift 2 |
| 24 | + ;; |
| 25 | + --install-dir) |
| 26 | + INSTALL_DIR="${2:-}" |
| 27 | + shift 2 |
| 28 | + ;; |
| 29 | + -h|--help) |
| 30 | + usage |
| 31 | + exit 0 |
| 32 | + ;; |
| 33 | + *) |
| 34 | + echo "unknown argument: $1" >&2 |
| 35 | + usage |
| 36 | + exit 1 |
| 37 | + ;; |
| 38 | + esac |
| 39 | +done |
| 40 | + |
| 41 | +if ! command -v curl >/dev/null 2>&1; then |
| 42 | + echo "curl is required." >&2 |
| 43 | + exit 1 |
| 44 | +fi |
| 45 | + |
| 46 | +detect_os() { |
| 47 | + local os |
| 48 | + os="$(uname -s | tr '[:upper:]' '[:lower:]')" |
| 49 | + case "${os}" in |
| 50 | + darwin|linux) echo "${os}" ;; |
| 51 | + *) |
| 52 | + echo "unsupported OS: ${os}" >&2 |
| 53 | + exit 1 |
| 54 | + ;; |
| 55 | + esac |
| 56 | +} |
| 57 | + |
| 58 | +detect_arch() { |
| 59 | + local arch |
| 60 | + arch="$(uname -m)" |
| 61 | + case "${arch}" in |
| 62 | + x86_64|amd64) echo "amd64" ;; |
| 63 | + arm64|aarch64) echo "arm64" ;; |
| 64 | + *) |
| 65 | + echo "unsupported architecture: ${arch}" >&2 |
| 66 | + exit 1 |
| 67 | + ;; |
| 68 | + esac |
| 69 | +} |
| 70 | + |
| 71 | +latest_version() { |
| 72 | + local api_url tag |
| 73 | + api_url="https://api.github.com/repos/${REPO}/releases/latest" |
| 74 | + tag="$(curl -fsSL "${api_url}" | grep -m1 '"tag_name"' | sed -E 's/.*"([^"]+)".*/\1/' || true)" |
| 75 | + if [[ -z "${tag}" ]]; then |
| 76 | + echo "failed to resolve latest release from ${api_url}" >&2 |
| 77 | + echo "set ARBITER_VERSION or pass --version <semver>" >&2 |
| 78 | + exit 1 |
| 79 | + fi |
| 80 | + echo "${tag#arbiter-v}" |
| 81 | +} |
| 82 | + |
| 83 | +if [[ "${VERSION_INPUT}" == "latest" ]]; then |
| 84 | + VERSION="$(latest_version)" |
| 85 | +else |
| 86 | + VERSION="${VERSION_INPUT#v}" |
| 87 | +fi |
| 88 | + |
| 89 | +OS="$(detect_os)" |
| 90 | +ARCH="$(detect_arch)" |
| 91 | +ASSET="arbiter_${VERSION}_${OS}_${ARCH}.tar.gz" |
| 92 | +BASE_URL="https://github.com/${REPO}/releases/download/arbiter-v${VERSION}" |
| 93 | + |
| 94 | +tmpdir="$(mktemp -d)" |
| 95 | +cleanup() { |
| 96 | + rm -rf "${tmpdir}" |
| 97 | +} |
| 98 | +trap cleanup EXIT |
| 99 | + |
| 100 | +echo "Downloading ${ASSET}..." |
| 101 | +curl -fsSL "${BASE_URL}/${ASSET}" -o "${tmpdir}/${ASSET}" |
| 102 | +curl -fsSL "${BASE_URL}/checksums.txt" -o "${tmpdir}/checksums.txt" |
| 103 | + |
| 104 | +expected_sha="$(awk -v name="${ASSET}" '{ |
| 105 | + file=$2 |
| 106 | + sub(/^\.\//, "", file) |
| 107 | + if (file == name) print $1 |
| 108 | +}' "${tmpdir}/checksums.txt")" |
| 109 | + |
| 110 | +if [[ -z "${expected_sha}" ]]; then |
| 111 | + echo "missing checksum for ${ASSET}" >&2 |
| 112 | + exit 1 |
| 113 | +fi |
| 114 | + |
| 115 | +if command -v sha256sum >/dev/null 2>&1; then |
| 116 | + actual_sha="$(sha256sum "${tmpdir}/${ASSET}" | awk '{print $1}')" |
| 117 | +elif command -v shasum >/dev/null 2>&1; then |
| 118 | + actual_sha="$(shasum -a 256 "${tmpdir}/${ASSET}" | awk '{print $1}')" |
| 119 | +else |
| 120 | + echo "sha256sum or shasum is required for checksum verification." >&2 |
| 121 | + exit 1 |
| 122 | +fi |
| 123 | + |
| 124 | +if [[ "${expected_sha}" != "${actual_sha}" ]]; then |
| 125 | + echo "checksum mismatch for ${ASSET}" >&2 |
| 126 | + exit 1 |
| 127 | +fi |
| 128 | + |
| 129 | +tar -xzf "${tmpdir}/${ASSET}" -C "${tmpdir}" |
| 130 | +if [[ ! -f "${tmpdir}/arbiter" ]]; then |
| 131 | + echo "release archive missing arbiter binary" >&2 |
| 132 | + exit 1 |
| 133 | +fi |
| 134 | + |
| 135 | +if [[ -z "${INSTALL_DIR}" ]]; then |
| 136 | + if [[ -w "/usr/local/bin" ]]; then |
| 137 | + INSTALL_DIR="/usr/local/bin" |
| 138 | + else |
| 139 | + INSTALL_DIR="${HOME}/.local/bin" |
| 140 | + fi |
| 141 | +fi |
| 142 | + |
| 143 | +mkdir -p "${INSTALL_DIR}" |
| 144 | +target="${INSTALL_DIR}/arbiter" |
| 145 | + |
| 146 | +if [[ -w "${INSTALL_DIR}" ]]; then |
| 147 | + install -m 755 "${tmpdir}/arbiter" "${target}" |
| 148 | +else |
| 149 | + if command -v sudo >/dev/null 2>&1; then |
| 150 | + sudo install -m 755 "${tmpdir}/arbiter" "${target}" |
| 151 | + else |
| 152 | + echo "install directory is not writable and sudo is unavailable: ${INSTALL_DIR}" >&2 |
| 153 | + exit 1 |
| 154 | + fi |
| 155 | +fi |
| 156 | + |
| 157 | +echo "Installed arbiter ${VERSION} to ${target}" |
| 158 | +if [[ ":${PATH}:" != *":${INSTALL_DIR}:"* ]]; then |
| 159 | + echo "Add ${INSTALL_DIR} to PATH if needed." |
| 160 | +fi |
| 161 | +echo "Next:" |
| 162 | +echo " arbiter local init" |
| 163 | +echo " arbiter local start" |
| 164 | + |
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