Function getGitHubContext

code-scan-action/src/github.ts:28–73

(token: string)

 * @returns GitHub PR context
 */
export async function getGitHubContext(token: string): Promise<PullRequestContext> {
  const context = github.context;

  // For workflow_dispatch, read pr_number from event inputs
  if (context.eventName === 'workflow_dispatch') {
    const prNumberInput = (context.payload.inputs as Record<string, string> | undefined)?.pr_number;
    if (!prNumberInput) {
      throw new Error(
        'workflow_dispatch requires a pr_number input. Add inputs: { pr_number: { required: true } } to your workflow.',
      );
    }

    const prNumber = parseInt(prNumberInput, 10);
    if (isNaN(prNumber)) {
      throw new Error(`Invalid pr_number input: "${prNumberInput}"`);
    }

    const octokit = new Octokit({ auth: token });
    const { data: pr } = await octokit.pulls.get({
      owner: context.repo.owner,
      repo: context.repo.repo,
      pull_number: prNumber,
    });

    return {
      owner: context.repo.owner,
      repo: context.repo.repo,
      number: pr.number,
      sha: pr.head.sha,
    };
  }

  // Otherwise, get context from pull_request event
  if (!context.payload.pull_request) {
    throw new Error(
      'This action requires a pull_request event or workflow_dispatch with pr_number input',
    );
  }

  return {
    owner: context.repo.owner,
    repo: context.repo.repo,
    number: context.payload.pull_request.number,
    sha: context.payload.pull_request.head.sha,
  };
}

/**
 * Get list of files changed in the PR