How to use 'exec node' in JavaScript

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async execNode(executable: string, args: any) {
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  // TODO: better
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  const loaderPrefix = this.componentName ? `isolating ${this.componentName}` : '';
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  const log = message => (this.componentName ? loader.setText(`${loaderPrefix}: ${message}`) : {});
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  const { patchFileSystem } = librarian.api();
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  const onScriptRun = () =>
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    this.componentName ? loader.setText(`running build for ${this.componentName} in an isolated environment`) : {}; // TODO: do this from the compiler/tester so we can customize the message
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  await patchFileSystem(executable, { args, cwd: this.container.path, log, onScriptRun });
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}

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function nodeExec(cmdLine, cwd, name, toShowOutput, toShowStdErr, fileParams) {
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    var root;
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    var replList = [];
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    function addRepl(list, prefix, filename, root_) {
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        var parts = filename.match(/^(.*)\/([^\/]*)$/);
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        var relFile = filename.indexOf(root_) === 0 ? filename.substr(root_.length) : filename;
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        list.push([prefix, filename]);
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        list.push([prefix + 'file', parts ? parts[2] : '']);
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        list.push([prefix + 'path', parts ? parts[1] : '']);
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        list.push([prefix + 'relfile', relFile]);
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    }
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    if (fileParams) {
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        root = getProjectRoot();
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        Object.keys(fileParams).forEach(function (key) {
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            addRepl(replList, key, fileParams[key], root);
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        });
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        replList.forEach(function (macro) {
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            cmdLine = cmdLine.replace('{{' + macro[0] + '}}', macro[1]);
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        });
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    }
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    ixDomains.exec('exec', cmdLine, cwd).fail(function (out) {
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        if (toShowStdErr) {
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            displayNodeResult(false, out, name);
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        }
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    }).done(function (out) {
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        if (toShowOutput) {
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            displayNodeResult(true, out, name);
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        }
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    });
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}