bwrap: Can't mkdir parents for /app/usr/lib/sdk/llvm12: Read-only file system about org.freedesktop.sdk.extension.llvm12

[Erick555]

This part of kdevelop manifest is suspicious to me. Please try removing it and test app again.

llvm12 is runtime extension but above line may trick flatpak it's app extension therefore bwrap try to mount it under /app.

[Erick555]

I confirmed this fixes it locally:

1. If extension is in manifest and is installed then running kdevlop fails
2. If extension is in manifest and isn't installed then running kdevlop succeeds
3. If extension is not in manifest and is installed then running kdevlop succeeds and extension is still mounted under /usr/lib/sdk/llvm12

So considering above the problem was hidden until you install extension and try running kdevelop. Removing mentioned part of manifest should fix the problem and all functionality will still be there.

[Erick555]

BTW: if the goal is to autodownload llvm12 extension during app install in order to ensure users will have it installed you may change above manifest part like this instead of removing it:

    "add-extensions": {
        "org.freedesktop.Sdk.Extension.llvm12": {
            "no-autodownload": "false",
            "version": "21.08"
        }
    },

Users would still need an extra step to activate it though unless you set --env=PATH=/app/bin:/usr/bin:/usr/lib/sdk/llvm12/bin permission in manifest.

[travier]

Thanks, I'll give it a try.

[travier]

Great! Thanks a lot for the help!

[travier]

Closing this one as I'll track progress on this in the KDevelop tracker. Thanks!