func CreateOrUpdateFile()

in pkg/github/repositories.go [229:335]
96 lines of code
15 McCabe index (conditional complexity)

func CreateOrUpdateFile(getClient GetClientFn, t translations.TranslationHelperFunc) (tool mcp.Tool, handler server.ToolHandlerFunc) {
	return mcp.NewTool("create_or_update_file",
			mcp.WithDescription(t("TOOL_CREATE_OR_UPDATE_FILE_DESCRIPTION", "Create or update a single file in a GitHub repository. If updating, you must provide the SHA of the file you want to update.")),
			mcp.WithToolAnnotation(mcp.ToolAnnotation{
				Title:        t("TOOL_CREATE_OR_UPDATE_FILE_USER_TITLE", "Create or update file"),
				ReadOnlyHint: false,
			}),
			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 where to create/update the file"),
			),
			mcp.WithString("content",
				mcp.Required(),
				mcp.Description("Content of the file"),
			),
			mcp.WithString("message",
				mcp.Required(),
				mcp.Description("Commit message"),
			),
			mcp.WithString("branch",
				mcp.Required(),
				mcp.Description("Branch to create/update the file in"),
			),
			mcp.WithString("sha",
				mcp.Description("SHA of file being replaced (for updates)"),
			),
		),
		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
			}
			content, err := requiredParam[string](request, "content")
			if err != nil {
				return mcp.NewToolResultError(err.Error()), nil
			}
			message, err := requiredParam[string](request, "message")
			if err != nil {
				return mcp.NewToolResultError(err.Error()), nil
			}
			branch, err := requiredParam[string](request, "branch")
			if err != nil {
				return mcp.NewToolResultError(err.Error()), nil
			}

			// Convert content to base64
			contentBytes := []byte(content)

			// Create the file options
			opts := &github.RepositoryContentFileOptions{
				Message: github.Ptr(message),
				Content: contentBytes,
				Branch:  github.Ptr(branch),
			}

			// If SHA is provided, set it (for updates)
			sha, err := OptionalParam[string](request, "sha")
			if err != nil {
				return mcp.NewToolResultError(err.Error()), nil
			}
			if sha != "" {
				opts.SHA = github.Ptr(sha)
			}

			// Create or update the file
			client, err := getClient(ctx)
			if err != nil {
				return nil, fmt.Errorf("failed to get GitHub client: %w", err)
			}
			fileContent, resp, err := client.Repositories.CreateFile(ctx, owner, repo, path, opts)
			if err != nil {
				return nil, fmt.Errorf("failed to create/update file: %w", err)
			}
			defer func() { _ = resp.Body.Close() }()

			if resp.StatusCode != 200 && resp.StatusCode != 201 {
				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 create/update file: %s", string(body))), nil
			}

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

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