Added by Denis 'GNUtoo' Carikli almost 5 years ago. Updated almost 5 years ago.
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| git-snapshot (2.19 KB) git-snapshot | Script to keep Git mirrors up-to-date incl. snapshots of references | doak complex, 06/26/2020 06:16 PM | |
| git-snapshot (2.36 KB) git-snapshot | doak complex, 06/26/2020 06:45 PM |
We use mirrors for various projects (LineageOS, AOSP, etc) which are tagged at each release. So corruption aside, we know we have the right history because it's behind a tag, regardless of what upstream does and on if we fetch new upstream revisions or not.
However this is not the case for branches like replicant-6.0.
Here's the advise I got on IRC:
< doak[m]> You could for example do something like this during the regular update:
< doak[m]> `git fetch "refs/heads/*:refs/snapshot/<date>/heads/*"`
And:
DATE="$(date -Imin)" git fetch "refs/heads/*:refs/snapshots/$DATE/heads/*" git fetch "refs/tags/*:refs/snapshots/$DATE/tags/*"
With the assumed used refspec +refs/*:refs/* to fetch everything from the remote into own mirror, every remote reference, which had been rewritten, will also be rewritten in the mirror. This includes remote branches and tags.
Though this is usually intended, creating snapshots of them just in case something will be changed maliciously, seems to be a good idea.
I made an conceptional mistake: `git fetch <remote> --prune "+refs/*:refs/*"` would also prune any snapshots below `refs/snapshots` :/
I played around with different approaches, but all the simple ones had some flaw.refs/snapshots/<date>.git fetch --prune by accident. This also reminds the user that she should use this script to update the mirror.Did not fetch like expected. Here is the fixed version.