Next Cron Job

This is a simple command line tool build in node that helps you find the next Cron Job. It parses the contents from a txt file and returns the job schedule.

Example case

Your scheduler config could looks like this:

30 1 /bin/run_me_daily
45 * /bin/run_me_hourly
  * * /bin/run_me_every_minute
* 19 /bin/run_me_sixty_times

• The first field is the minutes past the hour
• The second field is the hour of the day
• The third is the command to run.

For both cases * means that it should run for all values of that field.

For instance, in the above example run_me_daily has been set to run at 1:30am every day and run_me_hourly at 45 minutes past the hour every hour. The fields are whitespace separated and each entry is on a separate line.

Results

When fed this config to stdin and a simulated 'current time' in the format HH:MM, as a command line argument, it outputs the soonest time at which each of the commands will fire and whether it is today or tomorrow. For example, given the above examples as input and the simulated 'current time' command-line argument 16:10 the output will be:

1:30 tomorrow - /bin/run_me_daily
16:45 today - /bin/run_me_hourly
16:10 today - /bin/run_me_every_minute
19:00 today - /bin/run_me_sixty_times

Usage

Please, be sure you have NodeJs (above 16) installed on your machine. The command template looks like this:

node index.js <txt file> <time>

In other words, for a cron-jobs.txt file living in the same folder as this project, you have to run the following command:

node index.js cron-jobs.txt 16:10