main/devicepkg-dev: add kernel scripts and config fragments

It simplifies kernel packaging and reduces some steps in the maintaining process. Kernel fork owners don't have to maintain kernel config in pmaports anymore as long as they have a defconfig in the fork

Using linux-postmarketos-grate as a test subject

Important note

This MR is to a kconfig-fragments and not to master, @craftyguy thinks this can be merged with just 1 approval instead of the usual 2. The 1 approval should probably come from either @jenneron or @craftyguy, ask us if you have questions.

added 2 commits

• bbbd6244 - main/devicepkg-dev: add kernel scripts and config fragments
• ea40e8c0 - linux-postmarketos-grate: use devicepkg-dev

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By jenneron on 2023-12-24T10:42:26

added 2 commits

• 7a032749 - main/devicepkg-dev: add kernel scripts and config fragments
• 3024f3b0 - linux-postmarketos-grate: use devicepkg-dev

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By jenneron on 2023-12-24T11:09:02

resolved all threads

By jenneron on 2023-12-24T11:09:08

added 2 commits

• 892718a1 - main/devicepkg-dev: add kernel scripts and config fragments
• cae6dac5 - linux-postmarketos-grate: use devicepkg-dev

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By jenneron on 2023-12-24T11:17:06

some TODOs:

• add verify function to prepare
• add versioned configs
• use it in other kernels

not necessary for this MR, can be done in follow-ups

By jenneron on 2023-12-24T18:13:54

added 1 commit

• 2f532673 - linux-postmarketos-grate: use devicepkg-dev

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By jenneron on 2023-12-25T08:08:12

The idea of doing config fragments has been discussed a lot in the past and we could never come up with a good way to do it, although perfect may be the enemy of good in this case.

The biggest issue is that handling multiple kernel versions is hard, CONFIG options aren't stable and have been arbitrarily added/removed/modified. Limiting them to only maintained/mainline devices simplifies this but also limits the utility of having fragments in the first place - what do they solve that pmbootstrap kconfig check doesn't?

The other big issue is that it means a kernel that might be working fine breaks due to a change in the config fragments, this could be pretty infuriating to track down.

Overall I'd say I'm not against this approach - if it helps with your workflow and doesn't impede others then I certainly wouldn't NAK it - but I don't think I'd use it for the SDM845 kernel.

By Caleb Connolly on 2024-01-01T23:45:51

Please could you take the time to write an MR description to explain the what and the why behind these changes?

By Caleb Connolly on 2024-01-01T23:45:43

added 2 commits

• 6add86b4 - main/devicepkg-dev: add kernel scripts and config fragments
• 4d74821a - linux-postmarketos-grate: use devicepkg-dev

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By jenneron on 2023-12-26T18:59:18

changed the description

By jenneron on 2023-12-26T19:00:09

added 2 commits

• 7ef706cf - main/devicepkg-dev: add kernel scripts and config fragments
• 7963b193 - linux-postmarketos-grate: use devicepkg-dev

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By jenneron on 2023-12-28T19:47:01

mentioned in epic &2

By clayton craft on 2023-12-29T20:20:15

mentioned in issue #2492

By jenneron on 2023-12-30T10:45:32

mentioned in issue pmbootstrap#2286

By jenneron on 2023-12-30T10:51:15

mentioned in issue pmbootstrap#2285 (closed)

By jenneron on 2023-12-30T10:51:34

mentioned in issue #2490 (closed)

By jenneron on 2023-12-30T10:54:58