Using `dart run` conflicts with `flutter pub get`

[ziqq]

Every time after running dart run build_runner build --delete-conflicting-outputs command you have to run flutter pub get to remove the error below.

[jakemac53]

Can you provide a small repro example, ideally as a git repo?

[natebosch]

I think this is because dart run build_runner runs a dart pub get.

dart pub get conflicts with flutter pub get because the latter creates a synthetic package:flutter_gen into the solve.

cc @mit-mit

[jakemac53]

I didn't think you could do a dart pub get inside of a flutter package?

[ziqq]

I think this is because dart run build_runner runs a dart pub get.

dart pub get conflicts with flutter pub get because the latter creates a synthetic package:flutter_gen into the solve.

cc @mit-mit

Yep flutter run build_runner working fine, but build_runner requires dart run build_runner

[mit-mit]

cc @jonasfj @sigurdm

[sigurdm]

Yeah - this is a real problem.

A workaround is to run flutter pub get first to create the flutter_gen package.

But we should really find a solution for the flutter_gen package (either avoid it, or create proper support for it in pub) it keeps on creating problems in different places.

@christopherfujino I recently mentioned that we should look into this soon.

[lucavenir]

As mentioned in here the conflicts stands because flutter has its own generator (l10n wise).

Personally I stumbled on this because I've generated files in a custom folder with the following l10n configuration:

arb-dir: lib/l10n/arb
template-arb-file: app_en.arb
output-localization-file: app_localizations.dart
output-dir: lib/l10n/gen
synthetic-package: false
nullable-getter: false

If it can help, there are two workarounds:

1. Run packages get instead of just get, aka:

flutter clean && flutter packages get && dart run build_runner build -d

2. Just add flutter_gen as a dev dependency - idk why, but it works (probably this package is used somewhere in between the chain, or maybe one of its inner dependencies, idk)

[bwilkerson]

@jacob314 FYI