Function resolveSSHConfig

src/config/env.ts:506–649

()

 * Returns SSH config or null if no SSH options are provided
 */
export function resolveSSHConfig(): { config: SSHTunnelConfig; source: string } | null {
  // Get command line arguments
  const args = parseCommandLineArgs();

  // Check if any SSH options are provided
  const hasSSHArgs = args["ssh-host"] || process.env.SSH_HOST;
  if (!hasSSHArgs) {
    return null;
  }

  // Build SSH config from command line and environment variables
  let config: Partial<SSHTunnelConfig> = {};
  let sources: string[] = [];
  let sshConfigHost: string | undefined;

  // SSH Host (required)
  if (args["ssh-host"]) {
    sshConfigHost = args["ssh-host"];
    config.host = args["ssh-host"];
    sources.push("ssh-host from command line");
  } else if (process.env.SSH_HOST) {
    sshConfigHost = process.env.SSH_HOST;
    config.host = process.env.SSH_HOST;
    sources.push("SSH_HOST from environment");
  }

  // Check if the host looks like an SSH config alias
  if (sshConfigHost && looksLikeSSHAlias(sshConfigHost)) {
    // Try to parse SSH config for this host, default to ~/.ssh/config
    const sshConfigPath = getDefaultSSHConfigPath();
    console.error(`Attempting to parse SSH config for host '${sshConfigHost}' from: ${sshConfigPath}`);
    const sshConfigData = parseSSHConfig(sshConfigHost, sshConfigPath);
    if (sshConfigData) {
      // Use SSH config as base, but allow command line/env to override
      config = { ...sshConfigData };
      sources.push(`SSH config for host '${sshConfigHost}'`);
      
      // The host from SSH config has already been set, no need to override
    }
  }

  // SSH Port (optional, default: 22)
  if (args["ssh-port"]) {
    config.port = parseInt(args["ssh-port"], 10);
    sources.push("ssh-port from command line");
  } else if (process.env.SSH_PORT) {
    config.port = parseInt(process.env.SSH_PORT, 10);
    sources.push("SSH_PORT from environment");
  }

  // SSH User (required)
  if (args["ssh-user"]) {
    config.username = args["ssh-user"];
    sources.push("ssh-user from command line");
  } else if (process.env.SSH_USER) {
    config.username = process.env.SSH_USER;
    sources.push("SSH_USER from environment");
  }