func ListBranches()

in pkg/github/repositories.go [162:226]
59 lines of code
9 McCabe index (conditional complexity)

func ListBranches(getClient GetClientFn, t translations.TranslationHelperFunc) (tool mcp.Tool, handler server.ToolHandlerFunc) {
	return mcp.NewTool("list_branches",
			mcp.WithDescription(t("TOOL_LIST_BRANCHES_DESCRIPTION", "List branches in a GitHub repository")),
			mcp.WithToolAnnotation(mcp.ToolAnnotation{
				Title:        t("TOOL_LIST_BRANCHES_USER_TITLE", "List branches"),
				ReadOnlyHint: true,
			}),
			mcp.WithString("owner",
				mcp.Required(),
				mcp.Description("Repository owner"),
			),
			mcp.WithString("repo",
				mcp.Required(),
				mcp.Description("Repository name"),
			),
			WithPagination(),
		),
		func(ctx context.Context, request mcp.CallToolRequest) (*mcp.CallToolResult, error) {
			owner, err := requiredParam[string](request, "owner")
			if err != nil {
				return mcp.NewToolResultError(err.Error()), nil
			}
			repo, err := requiredParam[string](request, "repo")
			if err != nil {
				return mcp.NewToolResultError(err.Error()), nil
			}
			pagination, err := OptionalPaginationParams(request)
			if err != nil {
				return mcp.NewToolResultError(err.Error()), nil
			}

			opts := &github.BranchListOptions{
				ListOptions: github.ListOptions{
					Page:    pagination.page,
					PerPage: pagination.perPage,
				},
			}

			client, err := getClient(ctx)
			if err != nil {
				return nil, fmt.Errorf("failed to get GitHub client: %w", err)
			}

			branches, resp, err := client.Repositories.ListBranches(ctx, owner, repo, opts)
			if err != nil {
				return nil, fmt.Errorf("failed to list branches: %w", err)
			}
			defer func() { _ = resp.Body.Close() }()

			if resp.StatusCode != http.StatusOK {
				body, err := io.ReadAll(resp.Body)
				if err != nil {
					return nil, fmt.Errorf("failed to read response body: %w", err)
				}
				return mcp.NewToolResultError(fmt.Sprintf("failed to list branches: %s", string(body))), nil
			}

			r, err := json.Marshal(branches)
			if err != nil {
				return nil, fmt.Errorf("failed to marshal response: %w", err)
			}

			return mcp.NewToolResultText(string(r)), nil
		}
}