gleam publish: Get all .gleam files from src, do not using gitignore

[lpil]

Discussed in https://github.com/gleam-lang/gleam/discussions/3144

^{Originally posted by RudolfVonKrugstein May 16, 2024} Hi,

I have a problem with publishing and then using it on hex.

• I created this project: https://github.com/RudolfVonKrugstein/gleam_processgroups
• I tested to import the package using "path" form another package, it worked!
• I run gleam publish and successfully published it: https://hex.pm/packages/processgroups
• I added it to another project: gleam add processgroups
• I tried to use it: import processgroups as pg
• gleam does not accept it:

error: Unknown module
  ┌─ /home/nathan/projects/private/pubsub/src/pubsub.gleam:5:1
  │
5 │ import processgroups as pg
  │ ^^^^^^^^^^^^^^^^^^^^^^^^^^ Did you mean `process`?

No module has been found with the name `processgroups`.

I have no Idea why.

When I publish, I notice that it only publishes build files, not the source files:

Generated files:
  - include/processgroups_GroupMonitor.hrl
  - include/processgroups_ProcessJoined.hrl
  - include/processgroups_ProcessLeft.hrl
  - src/processgroups.app.src
  - src/processgroups.erl

Source files:
  - LICENSE
  - README.md
  - gleam.toml

That might be correct, but looking at other packages it seemed to me that hey also publish the .gleam files ...

Hi @RudolfVonKrugstein! Opening an issue for the bug you found.

Do you know how to reproduce this problem? What version of Gleam are you using?