lud
On Elixir 1.15, calling Mix.Task.run("app.config") prevents calling other modules from my tool.
The tool is installed globally with mix archive.install --force.
In my task run/1 callback, if I call some other module before app.config is called, then the module is loaded in memory and stays available. But if the app.config call happens before, then the module cannot be found.
It looks like app.config erases the load path or something like that.
It worked correctly on Elixir 1.14.
(On a side note I realized that I do not need that code anymore, since the config for the tool is defined in mix.exs ^^’ )
Where Next?
Trending in Questions
Other Trending Topics
Latest on Elixir Forum
Sponsor Spotlight
Build Elixir applications with speed and confidence.
Categories:
Sub Categories:
Forums
Popular Tags
- #ecto
- #liveview
- #troubleshooting
- #learning-elixir
- #library
- #deployment
- #erlang
- #testing
- #genserver
- #mix
- #absinthe
- #remote-other
- #otp
- #plug
- #how-to-question
- #macros
- #postgres
- #elixirconf
- #channels
- #exunit
- #discussion
- #code-sync
- #podcasts
- #javascript
- #onsite
- #dialyzer
- #docker
- #authentication
- #umbrella
- #full-time-contract
- #ai
- #podcasts-by-brainlid
- #ecto-query
- #blog-post
- #elixirconf-us
- #elixir-ls
- #phoenix_html
- #iex
- #graphql
- #genstage
- #websockets
- #supervisor
- #advent-of-code
- #distillery
- #processes
- #elixirconf-eu
- #api
- #forms
- #security
- #metaprogramming
Our Sponsors
Supporting innovation across the BEAM ecosystem.
We build reliable cloud platforms for business-critical systems.
Catch errors, track performance, monitor hosts and more.
Error tracking, logs, uptime, and Just Enough APM. Built for developers.
Elixir, Erlang & BEAM conferences from Code Sync - join us in 2026!
Master modern tools, write cleaner code, and tackle real-world challenges.
Bringing learning, work and compliance together since 1987.
The deployment platform built for Elixir: PaaS ease, VPS control.
The team behind Membrane, Popcorn, LiveDebugger. Available for hire.
Courses that'll move you from confusion to "Aha, now I get it!"
Showing Posts 1 to 2- Show Best Posts
- Show All (oldest first)
- Show All (newest first)
lud
Trying back on Elixir 1.14 and the task does not work without running app.config (could not load modules from :my_app, Are you in a mix project?).
Is there some change in this behaviour for Elixir 1.15? I am not sure when reading the changelog.
Edit: hmmm it seems that app.config is always required even in Elixir 1.15, I don’t know what happened before. But I still have that bug where the code of the globally installed task is not available anymore after app.config.
lud
I have this workaround for now: