Function fetchCommitSHA

pkg/cmd/extension/http.go:188–216

fetchCommitSHA finds full commit SHA from a target ref in a repo

(httpClient *http.Client, baseRepo ghrepo.Interface, targetRef string)

// fetchCommitSHA finds full commit SHA from a target ref in a repo
func fetchCommitSHA(httpClient *http.Client, baseRepo ghrepo.Interface, targetRef string) (string, error) {
	path := fmt.Sprintf("repos/%s/%s/commits/%s", baseRepo.RepoOwner(), baseRepo.RepoName(), targetRef)
	url := ghinstance.RESTPrefix(baseRepo.RepoHost()) + path
	req, err := http.NewRequest("GET", url, nil)
	if err != nil {
		return "", err
	}

	req.Header.Set("Accept", "application/vnd.github.v3.sha")
	resp, err := httpClient.Do(req)
	if err != nil {
		return "", err
	}

	defer resp.Body.Close()
	if resp.StatusCode == 422 {
		return "", commitNotFoundErr
	}
	if resp.StatusCode > 299 {
		return "", api.HandleHTTPError(resp)
	}

	body, err := io.ReadAll(resp.Body)
	if err != nil {
		return "", err
	}

	return string(body), nil
}