在C#中以编程方式编译打字稿? [英] Programmatically compile typescript in C#?
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问题描述
我试图用C#编写一个函数,该函数接受包含打字稿代码的字符串,并返回包含JavaScript代码的字符串。
I'm trying to write a function in C# that takes in a string containing typescript code and returns a string containing JavaScript code. Is there a library function for this?
推荐答案
您可以使用 Process
要调用编译器,请在临时文件夹中指定-out file.js
并读取已编译文件的内容。
You can use Process
to invoke the compiler, specify --out file.js
to a temporary folder and read the contents of the compiled file.
我做了一个小应用程序来做到这一点:
I made a little app to do that:
用法
TypeScriptCompiler.Compile(@"C:\tmp\test.ts");
获取 JS字符串
string javascriptSource = File.ReadAllText(@"C:\tmp\test.js");
带有示例和注释的完整源代码:
Full source with example and comments:
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
try
{
// compiles a TS file
TypeScriptCompiler.Compile(@"C:\tmp\test.ts");
// if no errors were found, read the contents of the compile file
string javascriptSource = File.ReadAllText(@"C:\tmp\test.js");
}
catch (InvalidTypeScriptFileException ex)
{
// there was a compiler error, show the compiler output
Console.WriteLine(ex.Message);
}
Console.ReadKey();
}
}
public static class TypeScriptCompiler
{
// helper class to add parameters to the compiler
public class Options
{
private static Options @default;
public static Options Default
{
get
{
if (@default == null)
@default = new Options();
return @default;
}
}
public enum Version
{
ES5,
ES3,
}
public bool EmitComments { get; set; }
public bool GenerateDeclaration { get; set; }
public bool GenerateSourceMaps { get; set; }
public string OutPath { get; set; }
public Version TargetVersion { get; set; }
public Options() { }
public Options(bool emitComments = false
, bool generateDeclaration = false
, bool generateSourceMaps = false
, string outPath = null
, Version targetVersion = Version.ES5)
{
EmitComments = emitComments;
GenerateDeclaration = generateDeclaration;
GenerateSourceMaps = generateSourceMaps;
OutPath = outPath;
TargetVersion = targetVersion;
}
}
public static void Compile(string tsPath, Options options = null)
{
if (options == null)
options = Options.Default;
var d = new Dictionary<string,string>();
if (options.EmitComments)
d.Add("-c", null);
if (options.GenerateDeclaration)
d.Add("-d", null);
if (options.GenerateSourceMaps)
d.Add("--sourcemap", null);
if (!String.IsNullOrEmpty(options.OutPath))
d.Add("--out", options.OutPath);
d.Add("--target", options.TargetVersion.ToString());
// this will invoke `tsc` passing the TS path and other
// parameters defined in Options parameter
Process p = new Process();
ProcessStartInfo psi = new ProcessStartInfo("tsc", tsPath + " " + String.Join(" ", d.Select(o => o.Key + " " + o.Value)));
// run without showing console windows
psi.CreateNoWindow = true;
psi.UseShellExecute = false;
// redirects the compiler error output, so we can read
// and display errors if any
psi.RedirectStandardError = true;
p.StartInfo = psi;
p.Start();
// reads the error output
var msg = p.StandardError.ReadToEnd();
// make sure it finished executing before proceeding
p.WaitForExit();
// if there were errors, throw an exception
if (!String.IsNullOrEmpty(msg))
throw new InvalidTypeScriptFileException(msg);
}
}
public class InvalidTypeScriptFileException : Exception
{
public InvalidTypeScriptFileException() : base()
{
}
public InvalidTypeScriptFileException(string message) : base(message)
{
}
}
}
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