[erlang-questions] [ANN] power_shell 1.1.2 has been released

Richard O'Keefe raoknz@REDACTED
Thu Sep 19 06:06:33 CEST 2019

The example is power_shell:eval(dist_util, gen_challenge, []).
With the arguments being Module, Function, Arguments, why is
it not called power_shell:apply/3?

Since I'm currently trying to learn PowerShell, I was initially
confused by the module name.

On Thu, 19 Sep 2019 at 16:02, Maxim Fedorov <maximfca@REDACTED> wrote:

> power_shell is an application providing a convenient way to evaluate
> functions extracted from compiled *.beam file, or read from *.erl
> source.
> How do we use it at WhatsApp?
> Debugging on production machines: evaluating functions that are not
> exported. For example, dist_util.erl contains gen_challenge/0, but it
> is not accessible without making a change to OTP kernel application.
> Using power_shell:eval(dist_util, gen_challenge, []) yields the
> desired result.
> Common Tests: testing functions that are not exported. We want to test
> against production build, providing production API.
> Development: changing *.erl file and immediately evaluating functions
> directly from *.erl file (no need to c(mymodule) to compile and load
> updated code).
> Package is available on hex:
> https://hex.pm/packages/power_shell
> Source code is available on GitHub:
> https://github.com/WhatsApp/power_shell
> Enjoy!
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