tasker

An LFE application for running recurring tasks

Table of Contents

• About
• Build
• Start the Project REPL
• Tests
• Usage
• License

About ↟

The tasker tool simply takes configuration that describes one or more OS CLI calls and executes them reguarly at the configured interval. Task metadata takes the following form:

[{name, String},
 {cmd, String},
 {args, [term] | []},
 {interval, Integer}
]

And a complete configiration takes the form:

[{tasker,
  [{tasks, [metadata, ...]}]
}].

See ./priv/examples for working configs.

Build ↟

Note that, due to the use of the safer timer:apply_repeatedly, this project requires Erlang 26 or later.

$ rebar3 lfe compile

Start the Project REPL ↟

$ rebar3 lfe repl

Tests ↟

$ rebar3 as test lfe test

Usage ↟

Run the date example, calling out to the system shell every 5 seconds to get the system date:

erl -noshell -pa $(rebar3 path) \
  -config priv/examples/shell-date.config \
  -run tasker start

Run the example that configures multiple recurring tasks:

erl -noshell -pa $(rebar3 path) \
  -config priv/examples/multiple.config \
  -run tasker start

For convenience, a shell script has been added that allows one to run a config like so:

./bin/tasker priv/examples/multiple.config

An alternative that executes the call as a background OS process:

./bin/taskerd priv/examples/multiple.config

License ↟

Apache License, Version 2.0

Copyright © 2023, Duncan McGreggor [email protected].