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erlangrebar

How can I see all available reltool overlay template variables?

I have a fairly standard OTP setup with rebar and reltool. I've setup reltool to use a vars.config to swap in overlay template variables with {overlay_vars, "files/vars.config"}. I've noticed that variables other than what I have listed in vars.config also work as overlay template variables, the most obvious one of which is {{erts_vsn}}.

I assume there are other built-in variables; how do I find what they are? I've combed the reltool docs and come up with nothing.

Solution

  • I believe that your answer is in Rebar's rebar_reltool module. There, you find the definition for:

    • erts_vsn
    • rel_vsn
    • target_dir