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Add push SSH LFS protocol support #31448

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wants to merge 6 commits into from
Closed

Add push SSH LFS protocol support #31448

wants to merge 6 commits into from

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ConcurrentCrab
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@ConcurrentCrab ConcurrentCrab commented Jun 21, 2024 •
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Fixes #17554

/claim #17554

DONTMERGE, this is very much a minimum-changes-required commit, probably needs cleanup and documentation changes.

@GiteaBot GiteaBot added the lgtm/need 2 This PR needs two approvals by maintainers to be considered for merging. label Jun 21, 2024
@pull-request-size pull-request-size bot added the size/XS Denotes a PR that changes 0-9 lines, ignoring generated files. label Jun 21, 2024
@github-actions github-actions bot added modifies/go Pull requests that update Go code modifies/cli PR changes something on the CLI, i.e. gitea doctor or gitea admin labels Jun 21, 2024
@ConcurrentCrab ConcurrentCrab mentioned this pull request Jun 21, 2024
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@delvh delvh marked this pull request as draft June 21, 2024 21:55
@pull-request-size pull-request-size bot added size/XXL Denotes a PR that changes 1000+ lines, ignoring generated files. and removed size/XS Denotes a PR that changes 0-9 lines, ignoring generated files. labels Jun 27, 2024
@github-actions github-actions bot removed modifies/translation modifies/api This PR adds API routes or modifies them modifies/templates This PR modifies the template files modifies/migrations modifies/internal modifies/js labels Jun 27, 2024
@ConcurrentCrab ConcurrentCrab changed the title [WIP] Add push SSH LFS protocol support Add push SSH LFS protocol support Jun 28, 2024
@ConcurrentCrab ConcurrentCrab marked this pull request as ready for review June 28, 2024 03:57
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Pushing and cloning work well now. Removing draft label.

To test, run pushes like: GIT_TRACE=1 git push. The trace output should mention "pure SSH connection".

@ConcurrentCrab
routers/private: fix push-on-create being incorrectly triggered
5c4268c 
The code here checks if the repo being requested doesn't exist.
If it doesn't, then a write operation might create it. But a read
operation doesn't make any sense, and should error out. So simply
check the access mode.

I assume this was the intent here, but only checked for one "verb"
instead, while there exist other read-only verbs as well. And ofc
more can be introduced in the future ;)

Possibly some write verbs don't make sense as well (presumably
those that only add stuff incrementally to existing repos)?
@ConcurrentCrab
cmd: refactor runServ()
a177bb0 
Coalesce access mode detection into one place.
Yes, "upload" really has opposite semantics for
git commands vs. git-lfs commands. Wow.

This commit makes no functional changes.
@ConcurrentCrab
modules/lfs: add GetMeta method to ContentStore
abc01ea 
A download command in the SSH protocol doesn't specify size, so
this was necessary.
@ConcurrentCrab
modules/lfstransfer/transfer: vendor from charmbracelet
5b3f2a3 
Big changes are inevitable due to the difference in Gitea's approach
to storing LFS files. And upstream hasn't tagged for a while anyway.
@ConcurrentCrab
modules/lfstransfer: modify transfer.Backend interface
8492908 
Make a few changes to make the transfer backend suit Gitea better.

Merge Upload into one method:
  Makes things simpler since out content store verifies size & hashes
  itself

Change Download return into io.ReadCloser:
  Removes dependency on filesystem

Add size: int64 arguments wherever appropriate
  In arguments for Upload and Verify, and in return for Download
@ConcurrentCrab
modules/lfstransfer: add a backend and runner
81e8e90 
Also add handler in runServ()

The protocol lib supports locking but the backend does not,
as neither does Gitea. Support can be added later and the
capability advertised.
@ConcurrentCrab
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Changed package from lfs_ssh to lfstransfer to satisfy lint ¯\(ツ)/¯

@ConcurrentCrab
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Continued in #31516

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Support LFS purely over SSH protocol
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