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))