vscode-code-runner去除末尾自动添加的文件名

起因

对于一个go项目，如果main package包含多个文件，则需要运行go run .这样的命令。在vscode中，code-runner默认的go文件运行命令在defaultSettings.json中如下：

"code-runner.executorMap": {
  "go": "go run",
}

实际运行时，会变成`go run "$fullFileName"，此时main package无法识别多个.go文件的内容。

操作

好，那就在settings.json里，把他改成："go": "go run ."，运行！

确实可以正常运行了，但是末尾怎么会自动带上$fullFileName呢，太丑了，而且还会影响到程序的argv。
对比其他的命令，发现如果command中不自己写上$fileName，$dir之类的变量，code-runner就会自动给末尾加上$fullFileName。再看了一遍defaultSettings，似乎没有什么配置可以指定不加上这段文件名。
那就看插件源码。
发现在src\codeManager.ts::getFinalCommandToRunCodeFile中，确实有这种逻辑。如果没有变量需要替换，就自动加上文件名了。

// code from https://github.com/formulahendry/vscode-code-runner
private async getFinalCommandToRunCodeFile(executor: string, appendFile: boolean = true): Promise<string> {
    let cmd = executor;

    if (this._codeFile) {
        const codeFileDir = this.getCodeFileDir();
        const pythonPath = cmd.includes("$pythonPath") ? await Utility.getPythonPath(this._document) : Constants.python;
        const placeholders: Array<{ regex: RegExp, replaceValue: string }> = [
            // A placeholder that has to be replaced by the path of the folder opened in VS Code
            // If no folder is opened, replace with the directory of the code file
            { regex: /\$workspaceRoot/g, replaceValue: this.getWorkspaceRoot(codeFileDir) },
            // A placeholder that has to be replaced by the code file name without its extension
            { regex: /\$fileNameWithoutExt/g, replaceValue: this.getCodeFileWithoutDirAndExt() },
            // A placeholder that has to be replaced by the full code file name
            { regex: /\$fullFileName/g, replaceValue: this.quoteFileName(this._codeFile) },
            // A placeholder that has to be replaced by the code file name without the directory
            { regex: /\$fileName/g, replaceValue: this.getCodeBaseFile() },
            // A placeholder that has to be replaced by the drive letter of the code file (Windows only)
            { regex: /\$driveLetter/g, replaceValue: this.getDriveLetter() },
            // A placeholder that has to be replaced by the directory of the code file without a trailing slash
            { regex: /\$dirWithoutTrailingSlash/g, replaceValue: this.quoteFileName(this.getCodeFileDirWithoutTrailingSlash()) },
            // A placeholder that has to be replaced by the directory of the code file
            { regex: /\$dir/g, replaceValue: this.quoteFileName(codeFileDir) },
            // A placeholder that has to be replaced by the path of Python interpreter
            { regex: /\$pythonPath/g, replaceValue: pythonPath },
        ];

        placeholders.forEach((placeholder) => {
            cmd = cmd.replace(placeholder.regex, placeholder.replaceValue);
        });
    }

    return (cmd !== executor ? cmd : executor + (appendFile ? " " + this.quoteFileName(this._codeFile) : ""));
}

对于go项目，运行go run .需要在根目录运行，有时候编辑完其他go文件，需要先切换回根目录的文件再用code-runner，不太方便。所以把executorMap修改为："go": "cd $workspaceRoot && go run ."即可。