cli-patch: generalize to-git functionality with PUSH_TO_GITHUB and PUSH_TO_REPO & enable for u-boot as well as kernel

[rpardini]

cli-patch: generalize to-git functionality with PUSH_TO_GITHUB and PUSH_TO_REPO & enable for u-boot as well as kernel

• cli-patch: generalize to-git functionality with PUSH_TO_GITHUB and PUSH_TO_REPO & enable for u-boot as well as kernel
  • PUSH_TO_REPO=<url>: set the full git URL to push to
  • PUSH_TO_GITHUB=<org>/<repo>: shorthand for pushing to GitHub; sets PUSH_TO_REPO
  • note: be kind to GitHub, and use forks of torvalds/linux and u-boot/u-boot so GH has a decent base tree
    • still, kernel pushes are huge, mostly due to the all-wifi-drivers commit that's always first and always slightly different
  • note: when pushing to GitHub, keep in mind the pushed branch contains a GHA workflow, which will only run if you have GHA enabled on the repo
  • examples (adapt to your username/forks):
    • ./compile.sh BOARD=nanopct6 BRANCH=edge rewrite-kernel-patches PUSH_TO_GITHUB=rpardini/linux
    • ./compile.sh BOARD=rock-5b BRANCH=legacy rewrite-uboot-patches PUSH_TO_GITHUB=rpardini/armbian-patched-u-boot

[igorpecovnik]

From my perspective, few bits to documentation and its ready to merge.

[igorpecovnik]

Completed? Docs bits needed.

[rpardini]

Docs could borrow from this PR description. In general, this functionality is not for end-user consumption, but could be very useful for developers, and the original idea was to get the CI jobs that build kernel and u-boot to publish the git tree to repos like armbian/linux and armbian/u-boot (one branch per kernel/board).