Confusion over comparing tags across forks

[graysky2]

I’d like to compare tags across forks in via the URL method but am unable to see diffs (clealy doing this incorrectly).  My goal is to see how archlinux/linux tag=v4.17.13-arch1 differs from linux/torvalds  tag=v4.17.13 (ie to see what the Arch devs are patching their version of the kernel with relative to the vanilla release).

I thought the following would do this but it does not give any diffs: https://github.com/archlinux/linux/compare/v4.17.13-arch1…torvalds:v4.17.13

I’m not sure how to fold in the stable tags to Linus’ tree in the url… on the shell the following works:

git clone https://github.com/archlinux/linux.git
cd linux
git remote add stable https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
git fetch --tags stable
git log v4.17.13..v4.17.13-arch1

[nadiajoyce]

Hi @graysky2,

Thanks so much for being part of the GitHub Community Forum. I’ll do all I can to help.

First, it looks like you are trying to compare using a tag that doesn’t actually exist. torvalds actually doesn’t appear to have a v4.17.13 tag, but only a v4.17 tag. Fixing that reference should help.

Additionally, you’ll want to switch the order of the URL for better results. Instead of setting up the URL so that you’re querying archlinux:v4.17.13-arch1 --> torvalds:v4.17, you’ll want to do this:

https://github.com/torvalds/linux/compare/v4.17…archlinux:v4.17.13-arch1

That should yield better results for you.

I hope this helps! Let me know if you have further questions.

[graysky2]

@nadiajoyce - Thank you for the thoughtful reply.  I acutally parallel posted here and on the Arch linux forums.  A user there (progandy) suggested the following which seems to work very well.

tag=v4.17.13
archtag=v4.17.13-arch1
tagged="$(curl "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tag/?h=$tag" | sed -n 's#.*/linux.git.commit.*id=\(\w*\).*#\1#p')"
xdg-open "https://github.com/archlinux/linux/compare/$tagged...$archtag"