func GetFileContents()

in pkg/github/repositories.go [412:486]
70 lines of code
11 McCabe index (conditional complexity)

func GetFileContents(getClient GetClientFn, t translations.TranslationHelperFunc) (tool mcp.Tool, handler server.ToolHandlerFunc) {
	return mcp.NewTool("get_file_contents",
			mcp.WithDescription(t("TOOL_GET_FILE_CONTENTS_DESCRIPTION", "Get the contents of a file or directory from a GitHub repository")),
			mcp.WithToolAnnotation(mcp.ToolAnnotation{
				Title:        t("TOOL_GET_FILE_CONTENTS_USER_TITLE", "Get file or directory contents"),
				ReadOnlyHint: true,
			}),
			mcp.WithString("owner",
				mcp.Required(),
				mcp.Description("Repository owner (username or organization)"),
			),
			mcp.WithString("repo",
				mcp.Required(),
				mcp.Description("Repository name"),
			),
			mcp.WithString("path",
				mcp.Required(),
				mcp.Description("Path to file/directory"),
			),
			mcp.WithString("branch",
				mcp.Description("Branch to get contents from"),
			),
		),
		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
			}
			path, err := requiredParam[string](request, "path")
			if err != nil {
				return mcp.NewToolResultError(err.Error()), nil
			}
			branch, err := OptionalParam[string](request, "branch")
			if err != nil {
				return mcp.NewToolResultError(err.Error()), nil
			}

			client, err := getClient(ctx)
			if err != nil {
				return nil, fmt.Errorf("failed to get GitHub client: %w", err)
			}
			opts := &github.RepositoryContentGetOptions{Ref: branch}
			fileContent, dirContent, resp, err := client.Repositories.GetContents(ctx, owner, repo, path, opts)
			if err != nil {
				return nil, fmt.Errorf("failed to get file contents: %w", err)
			}
			defer func() { _ = resp.Body.Close() }()

			if resp.StatusCode != 200 {
				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 get file contents: %s", string(body))), nil
			}

			var result interface{}
			if fileContent != nil {
				result = fileContent
			} else {
				result = dirContent
			}

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

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