{undef,[{docgen_otp_specs,module,[...]}]} in OTP 18.2

[NobbZ]

I don't know if this also happens with other 18.x, but with the latest OTP from erlang-solutions for ubuntu and debian it does happen.

I compiled erldocs from master (f042748) using the aforementioned erlang version. When I want to use it like ./erldocs . I do get the trace in this gist for every single file in the project. This example is the last block of output when trying to run erldocs in its own sourcedirectory.

[fenollp]

I am not sure how ESL distributes erlang on Debian. I compile from source using kerl or use Homebrew.

First make sure you have the erl_docgen app (which should be shipped with OTP). Your trace says docgen_otp_spes:module/2 is not found, which I can't replicate:

0 erldocs master λ find /usr/local -name docgen_otp_specs.erl
/usr/local/Cellar/erlang/18.2.1/lib/erlang/lib/erl_docgen-0.4.1/src/docgen_otp_specs.erl

Then cd into erldocs and run make test

[NobbZ]

As you can see, it is inplace:

% find /usr/lib/erlang -name '*docgen*'
/usr/lib/erlang/lib/erl_docgen-0.4.1
/usr/lib/erlang/lib/erl_docgen-0.4.1/src/docgen_otp_specs.erl
/usr/lib/erlang/lib/erl_docgen-0.4.1/src/docgen_edoc_xml_cb.erl
/usr/lib/erlang/lib/erl_docgen-0.4.1/src/docgen_xmerl_xml_cb.erl

Also this is in the code-path as far as I can see:

1> io:format("~p~n", [code:get_path()]).
[..., "/usr/lib/erlang/lib/erl_docgen-0.4.1", ...] % stripped

edit: Just tried make test, after a clean. As expected, erldocs is compiled first, then I do get output similar to the one above and make complains about errors.

[NobbZ]

I just left my laptop alone for a while and used evm to install 18.2. compiling and running tests using that do work.

Further testing shows that the version used to compile seems irrelevant. Regardless of which one I use for compiling, when I am running systems erlang, then I get the error described above, when I switch to evm's 18.2 everything works fine.

So it seems as if the escript isn't as self-contained as it should be. Or am I missing something on self-contained?

[fenollp]

Escripts are not supposed to contain OTP releases. You have an issue with ESL-packaged Erlang on your laptop, unrelated to erldocs.