async function getChangedFiles()

in paths-filter/src/main.ts [61:94]

• 28 lines of code
• 9 McCabe index (conditional complexity)

async function getChangedFiles(token: string, base: string, ref: string, initialFetchDepth: number): Promise<File[]> {
  // if base is 'HEAD' only local uncommitted changes will be detected
  // This is the simplest case as we don't need to fetch more commits or evaluate current/before refs
  if (base === git.HEAD) {
    if (ref) {
      core.warning(`'ref' input parameter is ignored when 'base' is set to HEAD`)
    }
    return await git.getChangesOnHead()
  }

  const prEvents = ['pull_request', 'pull_request_review', 'pull_request_review_comment', 'pull_request_target']
  if (prEvents.includes(github.context.eventName)) {
    if (ref) {
      core.warning(`'ref' input parameter is ignored when 'base' is set to HEAD`)
    }
    if (base) {
      core.warning(`'base' input parameter is ignored when action is triggered by pull request event`)
    }
    const pr = github.context.payload.pull_request as Webhooks.WebhookPayloadPullRequestPullRequest
    if (token) {
      return await getChangedFilesFromApi(token, pr)
    }
    if (github.context.eventName === 'pull_request_target') {
      // pull_request_target is executed in context of base branch and GITHUB_SHA points to last commit in base branch
      // Therefor it's not possible to look at changes in last commit
      // At the same time we don't want to fetch any code from forked repository
      throw new Error(`'token' input parameter is required if action is triggered by 'pull_request_target' event`)
    }
    core.info('Github token is not available - changes will be detected from PRs merge commit')
    return await git.getChangesInLastCommit()
  } else {
    return getChangedFilesFromGit(base, ref, initialFetchDepth)
  }
}