mecano/lib/cron/add.js

Common functions for system deployment.

// Generated by CoffeeScript 1.11.1
var diff, regexp, string, util, wrap;

module.exports = function(options, callback) {
  var crontab, jobs;
  if (!options.when) {
    return callback(new Error('valid when is required'));
  }
  if (!options.cmd) {
    return callback(new Error('valid cmd is required'));
  }
  if (options.user != null) {
    options.log({
      message: "Using user " + options.user,
      level: 'DEBUG',
      module: 'mecano/cron/add'
    });
    crontab = "crontab -u " + options.user;
  } else {
    options.log({
      message: "Using default user",
      level: 'DEBUG',
      module: 'mecano/cron/add'
    });
    crontab = "crontab";
  }
  jobs = null;
  return this.execute({
    cmd: crontab + " -l",
    code: [0, 1]
  }, function(err, _, stdout, stderr) {
    var added, i, job, modified, new_job, regex;
    if (err && !/^no crontab for/.test(stderr)) {
      throw err;
    }
    new_job = options.when + " " + options.cmd;
    regex = (function() {
      if (!options.match) {
        return new RegExp(".* " + (regexp.escape(options.cmd)));
      } else if (typeof options.match === 'string') {
        return new RegExp(options.match);
      } else if (util.isRegExp(options.match)) {
        return options.match;
      } else {
        throw Error("Invalid option 'match'");
      }
    })();
    added = true;
    jobs = (function() {
      var j, len, ref, results;
      ref = string.lines(stdout.trim());
      results = [];
      for (i = j = 0, len = ref.length; j < len; i = ++j) {
        job = ref[i];
        if (regex.test(job)) {
          added = false;
          if (job === new_job) {
            break;
          }
          options.log({
            message: "Entry has changed",
            level: 'WARN',
            module: 'mecano/cron/add'
          });
          diff(job, new_job, options);
          job = new_job;
          modified = true;
        }
        results.push(job);
      }
      return results;
    })();
    if (added) {
      jobs.push(new_job);
      options.log({
        message: "Job not found in crontab, adding",
        level: 'WARN',
        module: 'mecano/cron/add'
      });
    }
    if (!(added || modified)) {
      return jobs = null;
    }
  }).then(function(err) {
    if (err) {
      return callback(err);
    }
    if (!jobs) {
      return callback();
    }
    this.execute({
      cmd: options.user != null ? "su -l " + options.user + " -c '" + options.cmd + "'" : options.cmd,
      "if": options.exec
    });
    return this.execute({
      cmd: crontab + " - <<EOF\n" + (jobs.join('\n')) + "\nEOF"
    }).then(callback);
  });
};

util = require('util');

regexp = require('../misc').regexp;

diff = require('../misc/diff');

string = require('../misc/string');

wrap = require('../misc/wrap');