Function fetchDiff

pkg/cmd/pr/diff/diff.go:212–236

(httpClient *http.Client, baseRepo ghrepo.Interface, prNumber int, asPatch bool)

}

func fetchDiff(httpClient *http.Client, baseRepo ghrepo.Interface, prNumber int, asPatch bool) (io.ReadCloser, error) {
	path, err := safeurl.JoinPath("repos", baseRepo.RepoOwner(), baseRepo.RepoName(), "pulls", strconv.Itoa(prNumber))
	if err != nil {
		return nil, err
	}
	acceptType := "application/vnd.github.v3.diff"
	if asPatch {
		acceptType = "application/vnd.github.v3.patch"
	}

	// TODO(api-client-rollout)
	// This line of code is part of a mechanical roll out of the api client.
	// As a follow up, consider whether the api client can be injected to this call site, rather than constructed
	resp, err := api.NewClientFromHTTP(httpClient).Request(baseRepo.RepoHost(), http.MethodGet, path.String(), nil,
		api.WithHeader("Accept", acceptType))
	if err != nil {
		return nil, err
	}
	if resp.StatusCode != 200 {
		defer resp.Body.Close()
		return nil, api.UnexpectedStatusError(resp)
	}

	return resp.Body, nil
}

const lineBufferSize = 4096