function buildUserDataScript()

in src/aws.js [15:78]
55 lines of code
7 McCabe index (conditional complexity)

function buildUserDataScript(githubRegistrationToken, label) {
  let scriptContent;
  const cmd = `./config.sh --url https://github.com/${config.githubContext.owner}/${config.githubContext.repo} --token ${githubRegistrationToken} --labels ${label} --unattended ${config.input.disableEphemeralRunner ? '' : '--ephemeral'}`;

  if (config.input.runnerHomeDir) {
    // If runner home directory is specified, we expect the actions-runner software (and dependencies)
    // to be pre-installed in the AMI, so we simply cd into that directory and then start the runner
    scriptContent = [
      '#!/bin/bash',
      'exec > >(tee /var/log/user-data.log|logger -t user-data -s 2>/dev/console) 2>&1',
      `cd "${config.input.runnerHomeDir}"`,
      `echo "${config.input.preRunnerScript}" > pre-runner-script.sh`,
      'source pre-runner-script.sh',
      'export RUNNER_ALLOW_RUNASROOT=1',
      cmd
    ];
  } else {
    scriptContent = [
      '#!/bin/bash',
      'exec > >(tee /var/log/user-data.log|logger -t user-data -s 2>/dev/console) 2>&1',
      'mkdir actions-runner && cd actions-runner',
      `echo "${config.input.preRunnerScript}" > pre-runner-script.sh`,
      'source pre-runner-script.sh',
      'case $(uname -m) in aarch64) ARCH="arm64" ;; amd64|x86_64) ARCH="x64" ;; esac && export RUNNER_ARCH=${ARCH}',
      `RUNNER_VERSION=$(curl -s "https://api.github.com/repos/actions/runner/releases/latest" | grep -o '"tag_name"[[:space:]]*:[[:space:]]*"[^"]*"' | sed 's/.*"tag_name"[[:space:]]*:[[:space:]]*"\\([^"]*\\)".*/\\1/' | tr -d "v")`,
      'curl -O -L https://github.com/actions/runner/releases/download/v${RUNNER_VERSION}/actions-runner-linux-${RUNNER_ARCH}-${RUNNER_VERSION}.tar.gz',
      'tar xzf ./actions-runner-linux-${RUNNER_ARCH}-${RUNNER_VERSION}.tar.gz',
      'export RUNNER_ALLOW_RUNASROOT=1',
      cmd
    ];
  }

  if (config.input.runAsUser) {
    scriptContent.push(`chown -R ${config.input.runAsUser} .`);
  }

  if (config.input.runAsService) {
    scriptContent.push(`./svc.sh install ${config.input.runAsUser || ''}`);
    scriptContent.push('./svc.sh start');
  } else {
    scriptContent.push(`${config.input.runAsUser ? `su ${config.input.runAsUser} -c` : ''} ./run.sh`);
  }

  // Create MIME multipart format
  const boundary = '//';

  const mimeData = [
    'Content-Type: multipart/mixed; boundary="' + boundary + '"',
    'MIME-Version: 1.0',
    '',
    '--' + boundary,
    'Content-Type: text/x-shellscript; charset="us-ascii"',
    'MIME-Version: 1.0',
    'Content-Transfer-Encoding: 7bit',
    'Content-Disposition: attachment; filename="userdata.txt"',
    '',
    scriptContent.join('\n'),
    '',
    '--' + boundary + '--',
    ''
  ];

  return mimeData.join('\n');
}