temp-taiko/lib/repl/replHistory.js

An easy to use wrapper over Chrome Remote Interface.

var fs = require('fs');
module.exports = function(repl, file) {
  try {
    fs.statSync(file);
    repl.history = fs
      .readFileSync(file, 'utf-8')
      .split('\n')
      .reverse();
    repl.history.shift();
    repl.historyIndex = -1; // will be incremented before pop
  } catch (e) {}

  var fd = fs.openSync(file, 'a');
  var wstream = fs.createWriteStream(file, {
    fd: fd,
  });
  wstream.on('error', function(err) {
    throw err;
  });

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

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

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