This addresses https://github.com/go-gitea/gitea/issues/18352
It aims to improve performance (and resource use) of the `SyncReleasesWithTags` operation for pull-mirrors.
For large repositories with many tags, `SyncReleasesWithTags` can be a costly operation (taking several minutes to complete). The reason is two-fold:
1. on sync, every upstream repo tag is compared (for changes) against existing local entries in the release table to ensure that they are up-to-date.
2. the procedure for getting _each tag_ involves a series of git operations
```bash
git show-ref --tags -- v8.2.4477
git cat-file -t 29ab6ce9f36660cffaad3c8789e71162e5db5d2f
git cat-file -p 29ab6ce9f36660cffaad3c8789e71162e5db5d2f
git rev-list --count 29ab6ce9f36660cffaad3c8789e71162e5db5d2f
```
of which the `git rev-list --count` can be particularly heavy.
This PR optimizes performance for pull-mirrors. We utilize the fact that a pull-mirror is always identical to its upstream and rebuild the entire release table on every sync and use a batch `git for-each-ref .. refs/tags` call to retrieve all tags in one go.
For large mirror repos, with hundreds of annotated tags, this brings down the duration of the sync operation from several minutes to a few seconds. A few unscientific examples run on my local machine:
- https://github.com/spring-projects/spring-boot (223 tags)
- before: `0m28,673s`
- after: `0m2,244s`
- https://github.com/kubernetes/kubernetes (890 tags)
- before: `8m00s`
- after: `0m8,520s`
- https://github.com/vim/vim (13954 tags)
- before: `14m20,383s`
- after: `0m35,467s`
I added a `foreachref` package which contains a flexible way of specifying which reference fields are of interest (`git-for-each-ref(1)`) and to produce a parser for the expected output. These could be reused in other places where `for-each-ref` is used. I'll add unit tests for those if the overall PR looks promising.
Strangely #19038 appears to relate to an issue whereby a tag appears to
be listed in `git show-ref --tags` but then does not appear when `git
show-ref --tags -- short_name` is called.
As a solution though I propose to stop the second call as it is
unnecessary and only likely to cause problems.
I've also noticed that the tags calls are wildly inefficient and aren't using the common cat-files - so these have been added.
I've also noticed that the git commit-graph is not being written on mirroring - so I've also added writing this to the migration which should improve mirror rendering somewhat.
Fix #19038
Signed-off-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: 6543 <6543@obermui.de>
This PR registers requests with the process manager and manages hierarchy within the processes.
Git repos are then associated with a context, (usually the request's context) - with sub commands using this context as their base context.
Signed-off-by: Andrew Thornton <art27@cantab.net>
* Add info about list endpoints to CONTRIBUTING.md
* Let all list endpoints return X-Total-Count header
* Add TODOs for GetCombinedCommitStatusByRef
* Fix models/issue_stopwatch.go
* Rrefactor models.ListDeployKeys
* Introduce helper func and use them for SetLinkHeader related func
remove log() func from gogs times and switch to proper logging
Signed-off-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: Andrew Thornton <art27@cantab.net>
* Move last commit cache back into modules/git
Signed-off-by: Andrew Thornton <art27@cantab.net>
* Remove go-git from the interface for last commit cache
Signed-off-by: Andrew Thornton <art27@cantab.net>
* move cacheref to last_commit_cache
Signed-off-by: Andrew Thornton <art27@cantab.net>
* Remove go-git from routers/private/hook
Signed-off-by: Andrew Thornton <art27@cantab.net>
* Move FindLFSFiles to pipeline
Signed-off-by: Andrew Thornton <art27@cantab.net>
* Make no-go-git variants
Signed-off-by: Andrew Thornton <art27@cantab.net>
* Submodule RefID
Signed-off-by: Andrew Thornton <art27@cantab.net>
* fix issue with GetCommitsInfo
Signed-off-by: Andrew Thornton <art27@cantab.net>
* fix GetLastCommitForPaths
Signed-off-by: Andrew Thornton <art27@cantab.net>
* Improve efficiency
Signed-off-by: Andrew Thornton <art27@cantab.net>
* More efficiency
Signed-off-by: Andrew Thornton <art27@cantab.net>
* even faster
Signed-off-by: Andrew Thornton <art27@cantab.net>
* Reduce duplication
* As per @lunny
Signed-off-by: Andrew Thornton <art27@cantab.net>
* attempt to fix drone
Signed-off-by: Andrew Thornton <art27@cantab.net>
* fix test-tags
Signed-off-by: Andrew Thornton <art27@cantab.net>
* default to use no-go-git variants and add gogit build tag
Signed-off-by: Andrew Thornton <art27@cantab.net>
* placate lint
Signed-off-by: Andrew Thornton <art27@cantab.net>
* as per @6543
Signed-off-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>
* Fixes #2738 - /git/tags API
* proper URLs
* Adds function comments
* Updates swagger
* Removes newline from tag message
* Removes trailing newline from commit message
* Adds integration test
* Removed debugging
* Adds tests
* Fixes bug where multiple tags of same commit show wrong tag name
* Fix formatting
* Removes unused varaible
* Fix to annotated tag function names and response
* Update modules/git/repo_tag.go
Co-Authored-By: Lauris BH <lauris@nix.lv>
* Uses TagPrefix
* Changes per review, better error handling for getting tag and commit IDs
* Fix to getting commit ID
* Fix to getting commit ID
* Fix to getting commit ID
* Fix to getting commit ID
* Use go-git for tree reading and commit info lookup.
Signed-off-by: Filip Navara <navara@emclient.com>
* Use TreeEntry.IsRegular() instead of ObjectType that was removed.
Signed-off-by: Filip Navara <navara@emclient.com>
* Use the treePath to optimize commit info search.
Signed-off-by: Filip Navara <navara@emclient.com>
* Extract the latest commit at treePath along with the other commits.
Signed-off-by: Filip Navara <navara@emclient.com>
* Fix listing commit info for a directory that was created in one commit and never modified after.
Signed-off-by: Filip Navara <navara@emclient.com>
* Avoid nearly all external 'git' invocations when doing directory listing (.editorconfig code path is still hit).
Signed-off-by: Filip Navara <navara@emclient.com>
* Use go-git for reading blobs.
Signed-off-by: Filip Navara <navara@emclient.com>
* Make SHA1 type alias for plumbing.Hash in go-git.
Signed-off-by: Filip Navara <navara@emclient.com>
* Make Signature type alias for object.Signature in go-git.
Signed-off-by: Filip Navara <navara@emclient.com>
* Fix GetCommitsInfo for repository with only one commit.
Signed-off-by: Filip Navara <navara@emclient.com>
* Fix PGP signature verification.
Signed-off-by: Filip Navara <navara@emclient.com>
* Fix issues with walking commit graph across merges.
Signed-off-by: Filip Navara <navara@emclient.com>
* Fix typo in condition.
Signed-off-by: Filip Navara <navara@emclient.com>
* Speed up loading branch list by keeping the repository reference (and thus all the loaded packfile indexes).
Signed-off-by: Filip Navara <navara@emclient.com>
* Fix lising submodules.
Signed-off-by: Filip Navara <navara@emclient.com>
* Fix build
Signed-off-by: Filip Navara <navara@emclient.com>
* Add back commit cache because of name-rev
Signed-off-by: Filip Navara <navara@emclient.com>
* Fix tests
Signed-off-by: Filip Navara <navara@emclient.com>
* Fix code style
* Fix spelling
* Address PR feedback
Signed-off-by: Filip Navara <navara@emclient.com>
* Update vendor module list
Signed-off-by: Filip Navara <navara@emclient.com>
* Fix getting trees by commit id
Signed-off-by: Filip Navara <navara@emclient.com>
* Fix remaining unit test failures
* Fix GetTreeBySHA
* Avoid running `git name-rev` if not necessary
Signed-off-by: Filip Navara <navara@emclient.com>
* Move Branch code to git module
* Clean up GPG signature verification and fix it for tagged commits
* Address PR feedback (import formatting, copyright headers)
* Make blob lookup by SHA working
* Update tests to use public API
* Allow getting content from any type of object through the blob interface
* Change test to actually expect the object content that is in the GIT repository
* Change one more test to actually expect the object content that is in the GIT repository
* Add comments