Dependencies using rebar causes gleam build to exit with error

[emilpersson]

Dependencies using rebar causes gleam build to exit with the following message:

error: Unsupported build tool

The package base64url cannot be built as it does not use a build tool
supported by Gleam. It uses ["rebar"].

Steps to reproduce:

gleam new jwt_rebar_package
cd jwt_rebar_package
gleam add jwt
gleam build

manifest.toml:

# This file was generated by Gleam
# You typically do not need to edit this file

packages = [
  { name = "base64url", version = "0.0.1", build_tools = ["rebar"], requirements = [], otp_app = "base64url", source = "hex", outer_checksum = "FAB09B20E3F5DB886725544CBCF875B8E73EC93363954EB8A1A9ED834AA8C1F9" },
  { name = "gleam_stdlib", version = "0.30.0", build_tools = ["gleam"], requirements = [], otp_app = "gleam_stdlib", source = "hex", outer_checksum = "03710B3DA047A3683117591707FCA19D32B980229DD8CE8B0603EB5B5144F6C3" },
  { name = "gleeunit", version = "0.10.1", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleeunit", source = "hex", outer_checksum = "ECEA2DE4BE6528D36AFE74F42A21CDF99966EC36D7F25DEB34D47DD0F7977BAF" },
  { name = "jsx", version = "2.8.3", build_tools = ["mix", "rebar3"], requirements = [], otp_app = "jsx", source = "hex", outer_checksum = "FC3499FED7A726995AA659143A248534ADC754EBD16CCD437CD93B649A95091F" },
  { name = "jwt", version = "0.1.11", build_tools = ["rebar3"], requirements = ["base64url", "jsx"], otp_app = "jwt", source = "hex", outer_checksum = "B483FBB786D1BD050B3C551D323112D604E5B0F9CF9DC5671ADEEC462C2E36BB" },
]

[requirements]
gleam_stdlib = { version = "~> 0.30" }
gleeunit = { version = "~> 0.10" }
jwt = { version = "~> 0.1" }

[lpil]

Thank you! Let's get this fixed 💜

I think we may be able to use the existing rebar3 compiler to compile rebar projects, but I have not verified this.

[isaacharrisholt]

Hey, it looks like just changing rebar to rebar3 in the manifest.toml works, so it should be all good to just use rebar3 instead? Could be totally wrong here, and more testing is probably needed, but, since it's already broken, there's potential to implement the naive fix for now nad deal with edge cases as they crop up

[lpil]

I'm not sure what the support is for these projects, let's try ask our local Erlang wizard. :)

@tsloughter is rebar3 expected to be able to compile rebar projects?

[tsloughter]

Basic ones will compile. Like no plugins or hooks.

[lpil]

What do you think of Gleam using rebar3 to compile rebar deps?

[tsloughter]

Worth a shot. In this case it looks like the app should compile fine.

[lpil]

Fab, thank you!