coffee-script-1.2.0.repl.js Maven / Gradle / Ivy

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A Maven 2.0 plugin for compiling coffeescript into javascript
There is a newer version: 1.4.18
(function() {
  var ACCESSOR, CoffeeScript, Module, REPL_PROMPT, REPL_PROMPT_CONTINUATION, SIMPLEVAR, Script, autocomplete, backlog, completeAttribute, completeVariable, enableColours, error, getCompletions, inspect, readline, repl, run, stdin, stdout;

  CoffeeScript = require('./coffee-script');

  readline = require('readline');

  inspect = require('util').inspect;

  Script = require('vm').Script;

  Module = require('module');

  REPL_PROMPT = 'coffee> ';

  REPL_PROMPT_CONTINUATION = '......> ';

  enableColours = false;

  if (process.platform !== 'win32') {
    enableColours = !process.env.NODE_DISABLE_COLORS;
  }

  stdin = process.openStdin();

  stdout = process.stdout;

  error = function(err) {
    return stdout.write((err.stack || err.toString()) + '\n');
  };

  backlog = '';

  run = function(buffer) {
    var code, returnValue, _;
    if (!buffer.toString().trim() && !backlog) {
      repl.prompt();
      return;
    }
    code = backlog += buffer;
    if (code[code.length - 1] === '\\') {
      backlog = "" + backlog.slice(0, -1) + "\n";
      repl.setPrompt(REPL_PROMPT_CONTINUATION);
      repl.prompt();
      return;
    }
    repl.setPrompt(REPL_PROMPT);
    backlog = '';
    try {
      _ = global._;
      returnValue = CoffeeScript.eval("_=(" + code + "\n)", {
        filename: 'repl',
        modulename: 'repl'
      });
      if (returnValue === void 0) global._ = _;
      process.stdout.write(inspect(returnValue, false, 2, enableColours) + '\n');
    } catch (err) {
      error(err);
    }
    return repl.prompt();
  };

  ACCESSOR = /\s*([\w\.]+)(?:\.(\w*))$/;

  SIMPLEVAR = /\s*(\w*)$/i;

  autocomplete = function(text) {
    return completeAttribute(text) || completeVariable(text) || [[], text];
  };

  completeAttribute = function(text) {
    var all, completions, match, obj, prefix, val;
    if (match = text.match(ACCESSOR)) {
      all = match[0], obj = match[1], prefix = match[2];
      try {
        val = Script.runInThisContext(obj);
      } catch (error) {
        return;
      }
      completions = getCompletions(prefix, Object.getOwnPropertyNames(val));
      return [completions, prefix];
    }
  };

  completeVariable = function(text) {
    var completions, free, keywords, possibilities, r, vars, _ref;
    free = (_ref = text.match(SIMPLEVAR)) != null ? _ref[1] : void 0;
    if (free != null) {
      vars = Script.runInThisContext('Object.getOwnPropertyNames(this)');
      keywords = (function() {
        var _i, _len, _ref2, _results;
        _ref2 = CoffeeScript.RESERVED;
        _results = [];
        for (_i = 0, _len = _ref2.length; _i < _len; _i++) {
          r = _ref2[_i];
          if (r.slice(0, 2) !== '__') _results.push(r);
        }
        return _results;
      })();
      possibilities = vars.concat(keywords);
      completions = getCompletions(free, possibilities);
      return [completions, free];
    }
  };

  getCompletions = function(prefix, candidates) {
    var el, _i, _len, _results;
    _results = [];
    for (_i = 0, _len = candidates.length; _i < _len; _i++) {
      el = candidates[_i];
      if (el.indexOf(prefix) === 0) _results.push(el);
    }
    return _results;
  };

  process.on('uncaughtException', error);

  if (readline.createInterface.length < 3) {
    repl = readline.createInterface(stdin, autocomplete);
    stdin.on('data', function(buffer) {
      return repl.write(buffer);
    });
  } else {
    repl = readline.createInterface(stdin, stdout, autocomplete);
  }

  repl.on('attemptClose', function() {
    if (backlog) {
      backlog = '';
      process.stdout.write('\n');
      repl.setPrompt(REPL_PROMPT);
      return repl.prompt();
    } else {
      return repl.close();
    }
  });

  repl.on('close', function() {
    process.stdout.write('\n');
    return stdin.destroy();
  });

  repl.on('line', run);

  repl.setPrompt(REPL_PROMPT);

  repl.prompt();

}).call(this);