install.sh

#!/usr/bin/env bash
set -euo pipefail

REPO="${CONTD_REPO:-werifu/contd}"
VERSION="${CONTD_VERSION:-latest}"
INSTALL_DIR="${CONTD_INSTALL_DIR:-$HOME/.local/bin}"

os="$(uname -s | tr '[:upper:]' '[:lower:]')"
arch="$(uname -m)"

case "$os" in
  linux|darwin) ;;
  *)
    echo "contd installer supports Linux and macOS only (detected: $os)." >&2
    exit 1
    ;;
esac

case "$arch" in
  x86_64) arch="x86_64" ;;
  aarch64|arm64) arch="aarch64" ;;
  *)
    echo "unsupported architecture: $arch" >&2
    exit 1
    ;;
esac

asset="contd-${os}-${arch}.tar.gz"
checksums="SHA256SUMS"
base_url="https://github.com/${REPO}/releases"

if [[ "$VERSION" == "latest" ]]; then
  asset_url="${base_url}/latest/download/${asset}"
  checksum_url="${base_url}/latest/download/${checksums}"
else
  tag="$VERSION"
  if [[ "$tag" != v* ]]; then
    tag="v${tag}"
  fi
  asset_url="${base_url}/download/${tag}/${asset}"
  checksum_url="${base_url}/download/${tag}/${checksums}"
fi

tmpdir="$(mktemp -d)"
cleanup() {
  rm -rf "$tmpdir"
}
trap cleanup EXIT

echo "Downloading ${asset} from ${REPO}..."
curl -fL "$asset_url" -o "${tmpdir}/${asset}"
curl -fL "$checksum_url" -o "${tmpdir}/${checksums}"

if command -v sha256sum >/dev/null 2>&1; then
  (
    cd "$tmpdir"
    grep " ${asset}\$" "$checksums" | sha256sum -c -
  )
elif command -v shasum >/dev/null 2>&1; then
  expected="$(grep " ${asset}\$" "${tmpdir}/${checksums}" | awk '{print $1}')"
  actual="$(shasum -a 256 "${tmpdir}/${asset}" | awk '{print $1}')"
  if [[ "$expected" != "$actual" ]]; then
    echo "checksum mismatch for ${asset}" >&2
    exit 1
  fi
else
  echo "no sha256 tool found (need sha256sum or shasum)" >&2
  exit 1
fi

mkdir -p "$INSTALL_DIR"
tar -xzf "${tmpdir}/${asset}" -C "$tmpdir"
install -m 0755 "${tmpdir}/contd" "${INSTALL_DIR}/contd"

echo "Installed: ${INSTALL_DIR}/contd"
if ! command -v contd >/dev/null 2>&1; then
  echo "Note: add ${INSTALL_DIR} to PATH, then open a new shell."
fi