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Relx is a library that assembles Erlang/OTP releases. Given a releasespecification and a list of directories in which to search for OTPapplications it will generate a release output.

It is generally used through the Erlang/OTP build toolrebar3 which provides a cli interface.

relx is a library used byrebar3. Documentation onusingrebar3 for building releases withrelx can be found onrebar3.org.

Also seeAdopting Erlang's Releaseschapter.

Common Test suites can be run withrebar3:

$ rebar3 compile$ rebar3 ct

Tests for the start scripts that are generated byrelx are tested withshelltestrunner.

The scriptshelltests/run_tests.sh will clonerebar3 main and build itwith the currentrelx as a checkout dependency and then run the tests usingthatrebar3 escript:

$ shelltests/run_tests.sh