skypager-repl/dist/extensions/history.js

an awesome repl

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _fs = require('fs');

exports.default = function (repl, file) {

  console.log('Setting up history', file);

  try {
    var stat = (0, _fs.statSync)(file); // eslint-disable-line
    repl.rli.history = (0, _fs.readFileSync)(file, 'utf-8').split('\n').reverse();
    repl.rli.history.shift();
    repl.rli.historyIndex = 0;
  } catch (e) {}

  var fd = (0, _fs.openSync)(file, 'a');

  repl.rli.addListener('line', function (code) {
    if (code && code !== '.history') {
      (0, _fs.write)(fd, code + '\n', function () {});
    } else {
      repl.rli.historyIndex++;
      repl.rli.history.pop();
    }
  });

  process.on('exit', function () {
    (0, _fs.closeSync)(fd);
  });

  repl.commands['.history'] = {
    help: 'Show the history',
    action: function action() {
      var out = [];
      repl.rli.history.forEach(function (v) {
        out.push(v);
      });
      repl.outputStream.write(out.reverse().join('\n') + '\n', function (err) {});
      repl.displayPrompt();
    }
  };

  return repl;
};
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