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Semelhante a Cool new stuff in JGit and EGit - Eclipse Democamp Munich 2013-06-12
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Cool new stuff in JGit and EGit - Eclipse Democamp Munich 2013-06-12
- 1. Cool new stuff in JGit and EGit Eclipse Democamp Munich, Jun 12 2013 Matthias Sohn (SAP) matthias.sohnn@sap.com, @masohn
- 2. Agenda Serving Git Repositories with JGit JGit daemon GitBlit Gerrit The race - how to serve faster ? Other new stuff
- 3. Serving Git Repositories with JGit
- 4. Serving Git Repositories with JGit JGit daemon $ jgit daemon . --export-all --port 19418 Exporting /home/user/git/. Listening on 0.0.0.0/0.0.0.0:19418 $ git clone git://localhost:19418/test.git
- 5. Serving Git Repositories with JGit JGit daemon GitBlit Download and configure GitBlit GO Initialize certs $ java -jar authority.jar --baseFolder data Start server $ java -jar gitblit.jar --baseFolder data
- 6. GitBlit - Git server GitBlit is a Git server based on JGit http://gitblit.com/ • http daemon using JGit’s GitServlet • nice UI • user management • simple access control • Lucene based search Next GitBlit version 1.3 will use JGit 3.0 Demo
- 7. Serving Git Repositories with JGit JGit daemon GitBlit Gerrit Initialize and configure $ java –jar gerrit.war init -d gerrit_site Start server $ ./gerrit_site/bin/gerrit.sh start
- 8. Code Review with Git and Gerrit Gerrit is a Code Review system based on JGit http://code.google.com/p/gerrit/ Serves as a Git server • http and ssh daemon • access control • customizable code review workflow • plugins (also GitBlit) Gerrit 2.6 uses JGit 3.0 Demo
- 9. Code Review with Git and Gerrit
- 10. Serving faster Clone and Fetch Performance Typically dominated by "Counting: ..." phase Cost is linear with complexity and age of repository Linux kernel: 2.9M objects, 100% server CPU 60s counting time JGit Bitmap Indexes Pre-computed reachability data for commits in a pack file Linux kernel bitmap data: 2.9 MiB (for 559 MiB pack, 78 MiB idx) <80ms counting time ignored by native git ships in JGit 3.0 and Gerrit Code Review 2.6
- 11. Bitmap structure - Assign bits by order of objects in pack file - Objects to send = want AND_NOT have - Bitmaps are compressible - EWAH bitmap, variant of RLE Daniel Lemire, Owen Kaser, Kamel Aouiche, Sorting improves word-aligned bitmap indexes, Data & Knowledge Engineering, Volume 69, Issue 1, 2010
- 12. The Race - serving faster Run JGit’s GC to create bitmap index $ jgit --git-dir . debug-gc using JGit CLI $ ssh -p 29418 localhost gerrit gc linux using Gerrit CLI Race against native git daemon which does not (yet) understand bitmap index Demo
- 13. Recursive Merge - Can merge more complex version graphs - e.g. criss-cross merges - is now the default like in native git master fix1 2 common base versions How to merge branch fix1 ?
- 14. Other new EGit stuff Rename detection in history view and commit editor
- 15. Other new EGit stuff Reset to expression e.g. commit-id, HEAD^ ...
- 16. Other new EGit stuff Clean untracked resources
- 17. Other new EGit stuff 1-click Commit & Push in Commit Dialog and Staging View
- 18. Other new EGit stuff 3 way merge in merge tool
- 19. Questions ?
Notas do Editor
- Show the gitblit UIRepositoriesUsers/TeamsPermissionsSearch
- Show the UI- Do a comment
- Show the UI- Do a comment
- Maybe
- Maybe
- DemoExplain daemonsStart themStart cgit cloneStart jgit cloneExplain that „receiving objects“ and „resolving deltas“ is bound by network and client side processing