Plato - node-cli/repl.js

"use strict";

var nodeREPL  = require("repl");
var sushiREPL = require("sushi-repl");
var vm = require("vm");
var SCScript = require("./scscript");

function isObject(obj) {
  return obj && obj.constructor === Object;
}

function isSCObject(obj) {
  return obj && typeof obj._ !== "undefined";
}

var replOptions = {
  prompt: "scsc> ",
  eval: function(input, context, filename, callback) {
    // Node's REPL sends the input ending with a newline and then wrapped in
    // parens. Unwrap all that.
    input = input.replace(/^$([\s\S]*)\n$$/m, "$1");

try {
      var js = SCScript.compile(input, { loc: true, range: true });
      var result;
      if (context === global) {
        result = vm.runInThisContext(js, filename);
      } else {
        result = vm.runInContext(js, context, filename);
      }
      callback(null, formatter.Value(result.valueOf()));
    } catch (err) {
      callback(err);
    }
  }
};

module.exports = {
  start: function(opts) {
    if (opts.sushi) {
      replOptions.writer = sushiREPL.writer;
    }
    var repl = nodeREPL.start(replOptions);
    repl.on("exit", function() {
      repl.outputStream.write("\n");
    });
  }
};

node-cli/repl.js

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