Plugins with extra libraries as dependencies causes build to fail

[talhabalaj]

Hello,
I'm a contributor of flutter_secure_storage, I added the Linux support to this plugin. I noted that the app build succeeds while using the manual installation of Flutter but fails with the Snap version of flutter, as the snap version of flutter can't access the locally-installed libraries (like libsecret-dev used in flutter_secure_storage) as snap is isolated.

What should be the approach for plugin developers to fix this?

[Saviq]

Hi @talhabalaj, just use build-packages:, as documented here:

https://snapcraft.io/docs/snapcraft-yaml-reference

At least if I understood you well?

The snapped flutter is "classic", so it works in the context of the host system.

[MarcusTomlinson]

@Saviq I don't think @talhabalaj is building a snap himself, I think he's just referring to building an app using the Flutter snap. If that is the case, something is indeed wrong.

[talhabalaj]

@MarcusTomlinson Yes, building an app using Flutter snap, not building Snap which works with the configuration I have, build-packages and stage-packages both needed to be set for that. I don't why.

[talhabalaj]

Problem started here: juliansteenbakker/flutter_secure_storage#213

[MarcusTomlinson]

Apologies for the delay on this, been catching up on the backlog. I'll try have some answers for you early next week.

[talhabalaj]

Apologies for the delay on this, been catching up on the backlog. I'll try have some answers for you early next week.

No worries.

[MarcusTomlinson]

This issue is super weird.

PkgConfig::LIBSECRET results in a -lpkgcfg_lib_LIBSECRET_secret-1-NOTFOUND linker flag, but use ${LIBSECRET_LIBRARIES} and all works perfectly with the snap.

I'm trying to wrap my head around why PkgConfig:: would do this when pkg_check_modules is seemingly happy.

[MarcusTomlinson]

Ok so it appears this is a bug in CMake 3.10 (installed from 18.04 into the snap). Updating the snap to a core20 base fixes the issue for me at least.

@talhabalaj could I please ask you to give the new candidate snap a try and let me know if it works for you?

snap install flutter --classic
snap refresh flutter --channel candidate/20.04

Thank you!

[talhabalaj]

Thank you so much for looking into this. I'll surely try this soon and will let you know.