GhostDrive install bootstrap for curl | bash

ghost-drive-install-remote-gist.sh

#!/usr/bin/env bash

set -euo pipefail

GHOSTDRIVE_REPO="${GHOSTDRIVE_REPO:-shyamzzp/ghost-drive}"
GHOSTDRIVE_REF="${GHOSTDRIVE_REF:-main}"
GHOSTDRIVE_INSTALL_DIR="${GHOSTDRIVE_INSTALL_DIR:-$HOME/.local/bin}"
GHOSTDRIVE_SKIP_PROFILE_HINT="${GHOSTDRIVE_SKIP_PROFILE_HINT:-0}"
GHOSTDRIVE_WORKDIR=""
GHOSTDRIVE_GITHUB_TOKEN=""

cleanup() {
  if [[ -n "${GHOSTDRIVE_WORKDIR:-}" && -d "${GHOSTDRIVE_WORKDIR}" ]]; then
    rm -rf "$GHOSTDRIVE_WORKDIR"
  fi
}

usage() {
  cat <<'EOF'
Usage:
  curl -fsSL https://raw.githubusercontent.com/shyamzzp/ghost-drive/main/scripts/install-remote.sh | bash

Environment overrides:
  GHOSTDRIVE_REPO=owner/repo
  GHOSTDRIVE_REF=branch-or-tag
  GHOSTDRIVE_INSTALL_DIR=/custom/bin
  GITHUB_TOKEN=token-with-repo-access
  GH_TOKEN=token-with-repo-access

If neither token is set and GitHub CLI is installed, the installer will
try `gh auth token` automatically.
EOF
}

require_command() {
  local command_name="$1"

  if ! command -v "$command_name" >/dev/null 2>&1; then
    echo "Error: required command not found: $command_name" >&2
    exit 1
  fi
}

resolve_github_token() {
  if [[ -n "${GITHUB_TOKEN:-}" ]]; then
    GHOSTDRIVE_GITHUB_TOKEN="$GITHUB_TOKEN"
    return
  fi

  if [[ -n "${GH_TOKEN:-}" ]]; then
    GHOSTDRIVE_GITHUB_TOKEN="$GH_TOKEN"
    return
  fi

  if command -v gh >/dev/null 2>&1; then
    if GHOSTDRIVE_GITHUB_TOKEN="$(gh auth token 2>/dev/null)"; then
      GHOSTDRIVE_GITHUB_TOKEN="${GHOSTDRIVE_GITHUB_TOKEN//$'\r'/}"
      GHOSTDRIVE_GITHUB_TOKEN="${GHOSTDRIVE_GITHUB_TOKEN//$'\n'/}"
      if [[ -n "$GHOSTDRIVE_GITHUB_TOKEN" ]]; then
        echo "Using GitHub token from gh auth."
        return
      fi
    fi
  fi

  GHOSTDRIVE_GITHUB_TOKEN=""
}

download_archive() {
  local output_path="$1"
  local repo_visibility_url="https://api.github.com/repos/${GHOSTDRIVE_REPO}"
  local tarball_api_url="https://api.github.com/repos/${GHOSTDRIVE_REPO}/tarball/${GHOSTDRIVE_REF}"
  local public_url="https://codeload.github.com/${GHOSTDRIVE_REPO}/tar.gz/${GHOSTDRIVE_REF}"

  if [[ -n "$GHOSTDRIVE_GITHUB_TOKEN" ]]; then
    curl -fsSL \
      -H "Authorization: Bearer ${GHOSTDRIVE_GITHUB_TOKEN}" \
      -H "Accept: application/vnd.github+json" \
      "$tarball_api_url" \
      -o "$output_path"
    return
  fi

  if curl -fsSL "$repo_visibility_url" >/dev/null 2>&1; then
    curl -fsSL "$public_url" -o "$output_path"
    return
  fi

  echo "Error: ${GHOSTDRIVE_REPO} appears to be private. Set GITHUB_TOKEN with repo access and retry." >&2
  exit 1
}

main() {
  if [[ "${1:-}" == "-h" || "${1:-}" == "--help" ]]; then
    usage
    exit 0
  fi

  require_command bash
  require_command curl
  require_command tar
  require_command mktemp
  require_command go
  resolve_github_token

  local archive_path extracted_dir
  GHOSTDRIVE_WORKDIR="$(mktemp -d "${TMPDIR:-/tmp}/ghost-drive-install.XXXXXX")"
  trap cleanup EXIT
  archive_path="$GHOSTDRIVE_WORKDIR/ghost-drive.tar.gz"

  echo "Downloading ${GHOSTDRIVE_REPO}@${GHOSTDRIVE_REF}..."
  download_archive "$archive_path"
  tar -xzf "$archive_path" -C "$GHOSTDRIVE_WORKDIR"

  extracted_dir="$(find "$GHOSTDRIVE_WORKDIR" -mindepth 1 -maxdepth 1 -type d | head -n 1)"
  if [[ -z "$extracted_dir" ]]; then
    echo "Error: failed to unpack repository archive." >&2
    exit 1
  fi

  echo "Installing ghost-drive to $GHOSTDRIVE_INSTALL_DIR..."
  bash "$extracted_dir/scripts/install.sh" --global --install-dir "$GHOSTDRIVE_INSTALL_DIR"

  if [[ "$GHOSTDRIVE_SKIP_PROFILE_HINT" != "1" ]]; then
    echo
    echo "Quick start:"
    echo "  export PATH=\"$GHOSTDRIVE_INSTALL_DIR:\$PATH\""
    echo "  ghost-drive --help"
    echo "  ghost-drive upgrade"
  fi
}

main "$@"