How can I configure debug-level logging in my unit tests?

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1

I’ve got some ?LOG_DEBUG statements in my code. I’d like to see it while running rebar3 eunit. How can I configure debug-level logging in my unit tests?

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2

Found it: Base Config | Rebar3; use the --sys_config option.

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Sample sys.config for others treading this path:

[
    {kernel, [
        {logger_level, debug}
    ]}
].

Or, for a more concise output:

[
    {kernel, [
        {logger_level, debug},
        {logger, [
            {handler, default, logger_std_h, #{
                formatter => {logger_formatter, #{
                    template => [level,": ",msg,"\n"]
                }}
            }}
        ]}
    ]}
].

See Erlang – logger_formatter for more details.

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