Function fetchDraftRelease

pkg/cmd/release/shared/fetch.go:234–264

fetchDraftRelease returns the first draft release that has tagName as its pending tag.

(ctx context.Context, httpClient *http.Client, repo ghrepo.Interface, tagName string)

// fetchDraftRelease returns the first draft release that has tagName as its pending tag.
func fetchDraftRelease(ctx context.Context, httpClient *http.Client, repo ghrepo.Interface, tagName string) (*Release, error) {
	// First use GraphQL to find a draft release by pending tag name, since REST doesn't have this ability.
	var query struct {
		Repository struct {
			Release *struct {
				DatabaseID int64
				IsDraft    bool
			} `graphql:"release(tagName: $tagName)"`
		} `graphql:"repository(owner: $owner, name: $name)"`
	}

	variables := map[string]interface{}{
		"owner":   githubv4.String(repo.RepoOwner()),
		"name":    githubv4.String(repo.RepoName()),
		"tagName": githubv4.String(tagName),
	}

	gql := api.NewClientFromHTTP(httpClient)
	if err := gql.QueryWithContext(ctx, repo.RepoHost(), "RepositoryReleaseByTag", &query, variables); err != nil {
		return nil, err
	}

	if query.Repository.Release == nil || !query.Repository.Release.IsDraft {
		return nil, ErrReleaseNotFound
	}

	// Then, use REST to get information about the draft release. In theory, we could have fetched
	// all the necessary information via GraphQL, but REST is safer for backwards compatibility.
	path := fmt.Sprintf("repos/%s/%s/releases/%d", repo.RepoOwner(), repo.RepoName(), query.Repository.Release.DatabaseID)
	return fetchReleasePath(ctx, httpClient, repo.RepoHost(), path)
}

func fetchReleasePath(ctx context.Context, httpClient *http.Client, host string, p string) (*Release, error) {
	req, err := http.NewRequestWithContext(ctx, "GET", ghinstance.RESTPrefix(host)+p, nil)