crispinb
I want to use a recent fix in Mix (specifically Another attempt at fixing opening in browser on Windows · hexpm/hex@dd9c62b · GitHub) before the next elixir release arrives. I’ve looked through my installation directories (.asdf/installs/elixir/current/ on linux and ~\scoop\apps\elixir\current\ on windows) and have confused myself. I’ve browsed and ripgrepped and can’t find the relevant source. I realise I don’t have a good handle on how the default packages work so wouldn’t be sure what to do even if I do find it. So some questions from the general to the specific:
- is there a good general doc or description somewhere of how elixir packages relate to modules, and how module discovery and loading works? (in which case I might be able to answer the below questions myself).
- what are the source files (in
[installdir]/lib) used for? I’m guessing they’re not locally compiled, given the presence of the presumably preinstalled *.beam files in[installdir]/lib/**/ebin? - either way, can a preinstalled package be overriden locally? (eg. is there an equivalent of the order in a java classpath I can rely on, or can I edit and recompile one of the preinstalled modules in place?)
- how would I do this (whatever ‘this’ may turn out to be) for the Mix.Tasks.Hex.Docs in the quoted commit?
Answers to any or all alike much appreciated!
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eksperimental
Create a simbolic link in the install folder , that points to the git repo, I call mine “main” which is the name of the Elixir branch it is running on.
crispinb
After a bit of digging, the TLDR is just to delete my ~/.mix folder, and then reinstall the mix archive from HEAD with
mix install github hexpm/hex. I hadn’t entirely grokked that theMix.Tasks.Hex.Docspackage isn’t part of the Elixir installation, but comes with Hex.In case anyone else comes across this and wonders, here are my rube-ish answers to those of my own questions I’ve managed to answer myself (corrections/additions very welcome):
I haven’t found a single comprehensive source, but reading this Erlang doc (code — OTP 29.0.2 (kernel 11.0.2)), and playing around in
iexwith the:codefunctions was pretty enlightening.Perhaps but I haven’t tried it as it turned out not to be relevant to my situation after all. There is of course a code path from which BEAM files are loaded, and you can add to it
:code.add_paths/1or via an$ERL_LIBSenv var. In Erlang you can override anything other than the Kernel and StdLib modules, but I’m not sure about Elixir.Remove the hex-installed archives from
~/.mix, and reinstall from the hexpm/hex github repo HEAD withmix archive.install.crispinb
Thanks @eksperimental - it turns out I misdirected you, & the changes I wanted to bring in weren’t from the base Elixir installation.