Support for Heroku-20 stack

[fvvliet]

I'm trying to update my Vapor API on Heroku from -16 to -20 but get errors as mentioned below. Heroku-support tells me it might be caused by this buildpack. Can this buildpack be updated to support Heroku-20 ?

Thanks in advance, Frank

remote: Building source: remote: remote: -----> Building on the Heroku-20 stack remote: -----> Swift app detected remote: -----> Using Swift 4.0 (from .swift-version file) remote: -----> Installing clang 7.0.1 remote: xz: (stdin): File format not recognized remote: ! Push rejected, failed to compile Swift app. remote: remote: ! Push failed remote: Verifying deploy... remote: remote: ! Push rejected to VaporAPI

[vzsg]

I'll look into whether there's anything blocking the buildpack from being used on heroku-20.

But your project is unlikely to work either way, as it is now. Swift 4.0, the version you have pinned in .swift-version, is very old. Not counting the tons of bugs that have been fixed since then, it also didn't support Ubuntu 20.04 – that support only appeared in Swift 5.2.4.

So please try pinning a newer version of Swift in the meantime. I think 5.3.1 will work immediately.
(As I also need to fix support for 5.3.2.)

[vzsg]

Update: the buildpack now supports the heroku-20 stack for all supported Swift versions, and will tell you if your project has an unsupported configuration.

I'm closing this issue as what I could do on the buildpack side is done, but let me know if you run into trouble with the upgrade.

[fvvliet]

Thanks fo your help. Indeed I can't get the old code (Vapor 2) to work anymore, have to upgrade...