Eclipse Papercuts

Since beginning of last year I participate more or less actively in the Java User Group Mannheim. Unfortunately the former main contact of the Java User Group Mannheim Alex Hanschke has moved out of the area.

Benjamin Muskalla and myself volunteered to help organize the JUG Events. Therefore Benny and I will as of now try to find great new speakers and setup cool events. I think we are starting very well, as we are proud to have Matthias Sohn and Stefan Lay speak about Git and EGit on the 02.Sept. Git is one of the leading distributed version control systems and EGit a team provider for Eclipse.

Matthias and and Stefan are both committers in the EGit project. Details on Matthias and Stefan and the presentation can be found on the Majug Event Announcement. As usual we organize to have drinks after the event and hope Matthias and Stefan will be able to join so that you can bugger them with questions. The presentation will be in German.

Rumors are that we will see a real merge via EGit on this event… Hope to see you at their.

I learned from Steffen Pingel and Ekkehard Gentz that Mylyn has the ability to save local tasks outside the workspace. This is hidden under advanced in the Preferences.

This allows you to put your local tasks outside your workspace and versionize them with git. This way you can use git to move your local tasks between machines. I really like this as I frequently use different machines and now I can not only share source code betwee them but also my mylyn taslks.

As Steffen told me, simultanous access to the Mylyn tasks might cause task corruption but I don’t think that is an issue for me as Git takes care of conflicts and I do not have two machines writing to the same local file.

Fun times with Git and Mylyn!

Unfortunately the Eclipse team provider EGit does currently not support to use HTTPS for cloning and pushing.

Fortunately the Git command line supports this (under Linux without problems).

git clone https://vogella@github.com/vogella/de.vogella.rcp.example.git
// do some changes
git push https://vogella@github.com/vogella/de.vogella.rcp.example.git

If you are on Windows and if you are using msysGit then you may receive the following error:

error: error setting certificate verify locations:
CAfile: /bin/curl-ca-bundle.crt
CApath: none
while accessing your_repo

If you have this error you can disable ssl verification to solve it.

git config --global http.sslverify "false"

After this change cloning and pushing works via https on Windows.

Alternative the following should also make msysGit work, but I didn’t test these approaches.

copy C:\Program Files\Git\bin\curl-ca-bundle.crt to c:\bin\curl-ca-bundle.crt

or

 git config --system http.sslcainfo \bin/curl-ca-bundle.crt

The full discussion of the msysGit issue can be found here.

[Update:] If you are behind a http proxy you can set the proxy via the following command:

 git config --global http.proxy http://proxy:8080
// To check the proxy settings
git config --get http.proxy

After some time and effort mainly by Denis Roy and Bernhard Merkle the e4 git mirrors are working.

You find the e4 repos listed Eclipes Git overview.

EGit is also kind enough to be able to import all the projects from the different levels of the projects.

So give it a try via EGit and check out the e4 source code, e.g. the e4 UI projects via git://dev.eclipse.org/org.eclipse.e4/org.eclipse.e4.ui.git or if you want to use http via http://dev.eclipse.org/git/org.eclipse.e4/org.eclipse.e4.ui.git.

Git and EGit are getting popular. In case you want to start hacking on EGit this will give you some hints.

First install EGit following this guide EGit Tutorial.

First you need a few libraries from Orbit via cvs. The cvs location is “:pserver:anonymous@dev.eclipse.org/cvsroot/tools”. You need:

• org.eclipse.orbit/com.jcraft.jsch
• org.eclipse.orbit/org.kohsuke.args4j
• org.eclipse.orbit/javax.servlet

See Libraries from Orbit for getting these libraries.

Select File -> Import -> Git -> Git Repository and paste the URL “git://egit.eclipse.org/jgit.git” into the first line.

Do the same with “git://egit.eclipse.org/egit.git”.

Currently there is a little bug in EGit, please see Bug Report. If you facing the problem that the Team operations are not available on your new project my EGit Tutorial describes what to do to make the Team operations available. This should be fixed very soon, path is already commited to the master branch.

You have now the source code in your workspace and can start hacking.

For more info please see the excellent EGit Contributor Guide.

Eclipse recently started to provide Git mirrors of the cvs repositories.You find the location of the Git repository on the following website Eclipse Git repositories.

If you have the git commad line tools installed (Ubuntu: sudo apt-get git-core) you can use the following command to check these repositories out from the command line:

git clone url

for example to get the JFace snippets use the following command.

git clone git://dev.eclipse.org/org.eclipse.jface/org.eclipse.jface.snippets.git

After that checkout you can import the project into Eclipse via File -> Import -> General -> Existing Project into Workspace.

Of course you can use the EGit plugin to checkout Git repositories directly in Eclipse. Check the excellent EGit User Guide for this.

Via Git we have another nice option to get the Eclipse source code in additon to cvs and svn.

I believe Git does currently not support Project Set Files (.psf) similar to cvs to get a consistent set of plugins but at least individual plugins can be checked out.

Update I have created a small introduction to Git Git Tutorial and to EGit Git with Eclipse – EGit Tutorial. Hope this helps.