Error Encountered with vscode.workspace.workspaceFolders. Troubleshooting VS Code Extensions

While developing an extension for vscode, I encountered an error that I'm having trouble resolving. The goal is to create a script that generates a new file based on user inputs, but I'm running into an issue when trying to retrieve the path for the new file. Here's the relevant portion of the code:

let command3 = vscode.commands.registerCommand('command-bot.createFile', () => {
    var fileName = vscode.window.showInputBox({
        placeHolder: "Name your file"
    });
    var fileExt = vscode.window.showInputBox({
        placeHolder: "What is the extension? Example: .py or .html"
    });
    const folderPath = vscode.workspace.workspaceFolders[0].uri.toString().split(":")[1];
            //The code above caused the error! Error: Object is possibly 'undefined'
});

Answer №1

In the case where a user opens a workspace, the <code>workspaceFolders
feature is available, but not when the user simply opens a folder.

To handle this scenario, you can consider using a code snippet similar to the one below:

        let path: string;
        if (!workspace.workspaceFolders) {
            path = workspace.rootPath;
        } else {
            let root: WorkspaceFolder;
            if (workspace.workspaceFolders.length === 1) {
                root = workspace.workspaceFolders[0];
            } else {
                root = workspace.getWorkspaceFolder(resource);
            }

            path = root.uri.fsPath;
        }

https://github.com/vscode-restructuredtext/vscode-restructuredtext/blob/128.0.0/src/features/utils/configuration.ts#L154

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