JXAのコードをnode.jsへ移譲する例

使用OS: macOS 10.12

function nodejs(fn,lp='/usr/local/bin/node') {
	let code = `console.log(JSON.stringify((${fn.toString()}).apply(null,JSON.parse(process.env.NODE_ARGS))))`
	let data = $(code).dataUsingEncoding($.NSUTF8StringEncoding)
	return function(...args) {
		return new Promise((res,rej) => {
			let i = $.NSPipe.new
			i.fileHandleForWriting.writeData(data)
			i.fileHandleForWriting.closeFile
			let o = $.NSPipe.new
			let e = $.NSPipe.new
			let t = $.NSTask.new
			t.standardInput = i
			t.standardOutput = o
			t.standardError = e
			t.launchPath = lp
			t.environment = $({'NODE_ARGS':JSON.stringify(args)})
			t.launch
			t.waitUntilExit
			let out = o.fileHandleForReading.readDataToEndOfFile
			if (out.length>0) {
				try {
					res(JSON.parse($.NSString.alloc.initWithDataEncoding(out,$.NSUTF8StringEncoding).js))
				} catch(e) {
					rej(e)
				}
			}
			let err = e.fileHandleForReading.readDataToEndOfFile
			if (err.length>0) {
				rej({
					message: $.NSString.alloc.initWithDataEncoding(err,$.NSUTF8StringEncoding).js,
					status: t.terminationStatus,
				})
			}
		})
	}
}

foo=(x,y)=>x+y

nodejs(foo)(1,1)
.then (console.log)
.catch(r=>console.log('failure',r.message))