Loading the TypeScript compiler into ClearScript, “WScript is undefined”, impossible task?

Question

I tried using ClearScript to load the TypeScript compiler in order to compile some basic TypeScript code.

Unfortunately, when executing the TypeScript compiler source I

Answer 1

Here's a skeletal sample using the current version of typescript.js. Note that the TypeScript API is reverse-engineered; as far as I can tell the only official interface is at the tsc command line. Also keep in mind that this is a minimal sample that does no error handling or reporting:

using System;
using System.IO;
using Microsoft.ClearScript;
using Microsoft.ClearScript.V8;

namespace Test
{
    public class TypeScriptCompiler
    {
        private readonly dynamic _compiler;
        private readonly dynamic _snapshot;
        private readonly dynamic _ioHost;

        public TypeScriptCompiler(ScriptEngine engine)
        {
            engine.Evaluate(File.ReadAllText("typescript.js"));
            _compiler = engine.Evaluate("new TypeScript.TypeScriptCompiler");
            _snapshot = engine.Script.TypeScript.ScriptSnapshot;
            _ioHost = engine.Evaluate(@"({
                writeFile: function (path, contents) { this.output = contents; }
            })");
        }

        public string Compile(string code)
        {
            _compiler.addSourceUnit("foo.ts", _snapshot.fromString(code));
            _compiler.pullTypeCheck();
            _compiler.emitUnit("foo.ts", _ioHost);
            return _ioHost.output;
        }
    }

    public static class TestApplication
    {
        public static void Main()
        {
            using (var engine = new V8ScriptEngine())
            {
                var compiler = new TypeScriptCompiler(engine);
                Console.WriteLine(compiler.Compile("class Foo {}"));
            }
        }
    }
}