I've started on a new project, basically sort of a side project; It is about trying to replace the typical one time task/job scheduling engines/systems, used in GNU/Linux, namely at, atrm, atq, batch and other similar ones.

I'm calling it hat (hyper-at). The idea is to replace all of the mentioned ones with a single engine, with more option and flexibility.

Here's the README:

HAT (Hyper-AT) is an one time run job scheduler for GNU/Linux, with an emphasis on usability. It is designed to be a direct replacement of at (atq, atrm), batch, and other such one time run task scheduling engines/toolsets.

Benefits of hat:

• Seconds resolution i.e. you can run job at the mentioned second
• Use your shell of choice; you're not bound to /bin/sh
• Flexible datetime specifications, see https://github.com/heemayl/humantime-epoch-converter
• Will run a scheduled job later when the computer was off at that time, so no job will be missed
• User specific jobs, secured approach
• User based logging, all logs from jobs of a user go in ~/.hatd/logs/
• All-in-one i.e. no separate tool based on job or pattern
• Easy to use

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Here is the project on GitHub and GitLab:

GitHub: https://github.com/heemayl/hat

GitLab: https://gitlab.com/heemayl/hat

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Update (2018-02-07):

The project is deployment ready.

The installation is pretty simple, one just need to run the install.sh script. Please see https://github.com/heemayl/hat

After installation, the command to use from shell is hatc -- only this command should be used for everything involved e.g. schedule jobs, remove scheduled jobs, listing jobs and so on.

Here is a simple example workflow:

% hatc -l
[]

% hatc -c
0

% hatc --add free 'tomorrow 15:47:57'

% hatc -l
[
    [
        "1",
    {
        "command": "free",
        "job_run_at": 1518040077,
        "use_shell": false
    }
    ]
]

% hatc -c
1

% hatc -a 'echo $PATH' 'now + 3 mins' bash
{'msg': 'Done'}

% hatc -l
[
    [
        "1",
    {
        "command": "whoami",
        "job_run_at": 1518040077,
        "use_shell": false
    }
    ],
    [
        "2",
    {
        "command": "bash -c \"echo $PATH\"",
        "job_run_at": 1517999620,
        "use_shell": "bash"
    }
    ]
]

% hatc -c
2

% hatc --remove 1
{'msg': 'Queued'}

% hatc -l
[
    [
        "2",
        {
            "command": "bash -c \"echo $PATH\"",
        "job_run_at": 1517999620,
        "use_shell": "bash"
    }
    ]
]

% hatc -c
1

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