Package Exports

crontab

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (crontab) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

node-crontab

Allows reading, creating, deleting, manipulating, and saving system cronjobs with node.js.

Installation

$ npm install crontab

Examples

Kitchen sink

require('crontab').load(function(err, crontab) {
  // create with string expression
  var job = crontab.create('ls -la', '0 7 * * 1,2,3,4,5');

  // create with Date
  var job = crontab.create('ls -lh', new Date(1400373907766));

  // create with comment
  var job = crontab.create('ls -lt', null, 'comment 2');

  // create special: @reboot, @hourly, @daily, @weekly, @monthly, @yearly, @annually, @midnight
  var job = crontab.create('ls -la', '@reboot');

  // remove object
  var job = crontab.create('ls -lr', '0 7 * * 1,2,3,4,5', 'comment 3');
  crontab.remove(job);

  // remove conditions
  crontab.remove({command:'ls -lh', comment:/comment 2/});

  // manipulate: every business hour
  var job = crontab.create('ls -l');
  job.minute().at(0);
  job.hour().between(8, 17);
  job.dow().between('mon', 'fri');

  // manipulate: every other hour on weekday nights
  var job = crontab.create('ls -l');
  job.hour().between(19, 0).every(2);
  job.hour().between(0, 6).every(2);
  job.dow().between('mon', 'fri');
  
  // manipulate: summer
  var job = crontab.create('ls -l');
  job.month().between('jun', 'sep');
  
  // manipulate: Christmas
  var job = crontab.create('ls -l');
  job.minute().at(30);
  job.hour().at(9);
  job.dom().on(24);
  job.month().in('dec');

  // show all jobs
  var jobs = crontab.jobs();

  // show jobs with conditions
  var jobs = crontab.jobs({command:'ls -l', comment:/comment 1/});

  // reset jobs to their original state
  crontab.reset();

  // save
  crontab.save(function(err, crontab) {
  
  });

  console.log(crontab);
});

Naive reboot

require('crontab').load(function(err, crontab) {
  if (err) {
    return console.error(err);
  }

  var command = 'ls -l';

  crontab.remove({command:command});
  crontab.create(command, '@reboot');

  crontab.save(function(err, crontab) {

  });
});

More robust reboot and forever

require('crontab').load(function(err, crontab) {
  if (err) {
    return console.error(err);
  }

  var uuid           = '64d967a0-120b-11e0-ac64-0800200c9a66';
  var nodePath       = process.execPath.split('/').slice(0, -1).join('/');
  var exportCommand  = 'export PATH=' + nodePath + ':$PATH';
  var foreverCommand = require('path').join(__dirname, 'node_modules', 'forever', 'bin', 'forever');
  var sysCommand     = exportCommand + ' && ' + foreverCommand + ' start ' + __filename;

  crontab.remove({comment:uuid});
  crontab.create(sysCommand, '@reboot', uuid);

  crontab.save(function(err, crontab) {
    console.log(err)
  });
});

JSPM

crontab