Slides for talk held at EclipseCon 2015 Europe

1. News from Git in Eclipse
Matthias Sohn (SAP)
Max Hohenegger

2. JGit
new ignore implementation
improved submodule
support
aggressive gc
security fixes
3.6 Dec 2014
EGit
symlink support
improved submodule
support
checkout ours / theirs

3. much faster
support ** pattern
**/foo/bar matches foo/bar in any directory
abc/** matches everything (infinite depth) under abc
a/**/b matches "a/b", "a/x/b", "a/x/y/b“ and so on
support ! to negate rules defined previously
.a ignore .a files
! lib.a but do track lib.a
New ignore implementation

4. submodules nested
under .git
Improved submodule support
use staging view for submodules
(in separate projects)

5. available on files with conflicts
Checkout ours / theirs

6. Fix Git vulnerability
.GiT
case-insensitive FS
matches .git
GIT~1
Windows short-names
matches .git
.gu200cit
HFS+ (Mac)
matches .git since u200c
is ignored invisible
unicode characterprepare malicious commit
on case-sensitive FS
.GiT/config
GIT~1/refs/heads/master
.gu200cit/config
checkout on affected platform can
manipulate content of .git
➔ fixed in 3.4.2, 3.5.3, 3.6+

7. JGit
basics for gitattributes
basics for hook support
logging
3.7 Feb 2015
EGit
auto-configure Gerrit
performance improvements

8. Auto-configure review when cloning from Gerrit

9. JGit
hooks
move to Java 7
API cleanup
4.0 Jun 2015
EGit
basic git-flow support
e4 smart project import
API to prepare model
merge
allow to symlink .git

10. pre-commit
commit-msg
Hooks

11. e4 smart project import

12. JGit
basics for push certificates
improve ignore rules
pack expiration during gc
4.1 Sept 2015
EGit
merge strategy extension point
warn or block commit on errors
compare mode in staging view

13. plugin external
merge strategy
implementations
used by EMF to provide
model merge strategy
➔ "EMF Compare and EGit" session by Laurent Delaigue at 16:15 in Theater
Merge strategy extension point

14. Warn/block commit on errors

15. Compare Mode in Staging View

16. JGit
improved s3 support
.gitattributes
clean/smudge filters
basic LFS support
LFS server
cooking for 4.2 Dec 2015
EGit
configure date format
multi-push
external diff/merge tools
configure merge strategy

17. Custom diff/merge tools (e.g. p4merge)

18. Versioning large binaries in Git
large binary files can't be packed by Git efficiently
➔ slows down transport
➔ gc more expensive and less efficient
➔ Git repository quickly becomes bulky
➔ Git server load grows

19. .gitattributes
video.mp4
X.java
Large File Storage (LFS) extension
.git
-- objects
-- sha1
-- lfs
-- objects
-- sha256
git server
lfs server
git
lfs

20. .gitattributes
video.mp4
X.java
LFS configuration
.git
-- config
objects
-- sha1
-- lfs
-- objects
-- sha256
*.mp4 filter=lfs diff=lfs merge=lfs -text[filter "lfs"]
smudge = git-lfs smudge %f
clean = git-lfs clean %f
[lfs "http://lfs-server/]
access = basic
which files to be handled by LFS ?
lfs clean filter intercepts add
lfs smudge filter intercepts
checkout
pre-push hook
sends LFS objects to LFS server

21. .gitattributes
video.mp4
X.java
git add video.mp4
.git
-- objects
-- sha1
-- lfs
-- objects
-- sha256
version git-lfs/spec/v1
id sha256:5891b5b522...
size 6
store meta data in objects
store big file in lfs objects
lfs clean filter
video.mp4

22. .gitattributes
video.mp4
X.java
git push origin
.git
-- objects
-- sha1
-- lfs
-- objects
-- sha256
git server
lfs server
pre-push hook
version git-lfs/spec/v1
id sha256:5891b5b522...
size 6
push
video.mp4

23. .gitattributes
video.mp4
X.java
git fetch/clone, git checkout
.git
-- objects
-- sha1
-- lfs
-- objects
-- sha256
git server
lfs server
version git-lfs/spec/v1
id sha256:5891b5b522...
size 6
fetch all meta-data
checkout loads lazily
video.mp4

24. + .gitattributes
+ run clean filter on add
+ run smudge filter on checkout
+ run pre-push hook on push
- run filters during diff, merge, handle clone
➔ use external lfs in JGit/EGit with existing LFS server (e.g. GitHub)
- LFS extension implemented in JGit
- JGit LFS server
- LFS server Gerrit plugin
➔ builtin lfs in JGit/EGit with Gerrit / LFS server plugin
LFS support in JGit / Gerrit

25. Gitflow?
workflow & branching strategy
“It forms an elegant mental model
that is easy to comprehend and
allows team members to develop a
shared understanding of the
branching and releasing
processes.”
- Vincent Driessen
(creator of Gitflow)

26. Gitflow in a
Nutshell
Author: Vincent Driessen
Original blog post: http://nvie.com/posts/a-succesful-git-branching-model
License: Creative Commons BY-SA

27. Gitflow in
Eclipse
functional but not finished
+ feature start, finish, checkout, rebase
+ release start, start from commit, finish
+ hotfix start, finish
- several optional parameters
- support branches

28. Gitflow integration - Demo

29. Gitflow
What’s next?
it depends on you
- Gerrit integration
- Mylyn integration
- Maintaining features and releases
- ...

30. Questions & Answers