Trying to install JGit to install EGit and getting error requires package org.kohsuke.args4 - egit

Question

Trying to install JGit to install EGit and getting error:
Cannot complete the install because one or more required items could not be found.
Software being installed: Eclipse JGit Command Line Interface 2.1.0.201209190230-r (org.eclipse.jgit.pgm.feature.group 2.1.0.201209190230-r)
Missing requirement: JGit Command Line Interface 2.1.0.201209190230-r (org.eclipse.jgit.pgm 2.1.0.201209190230-r) requires 'package org.kohsuke.args4j [2.0.12,2.1.0)' but it could not be found
Cannot satisfy dependency:
From: Eclipse JGit Command Line Interface 2.1.0.201209190230-r (org.eclipse.jgit.pgm.feature.group 2.1.0.201209190230-r)
To: org.eclipse.jgit.pgm [2.1.0.201209190230-r]
~~~~ Update ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
I gave it the new update site and it said EGit was already installed
So then I went to uninstall it and only one of ~6 Egit entries had the Uninstall button enabled when selected. (Why won't it let me uninstall them? - ed) I uninstalled that one hoping maybe it would manage uninstalling all of the entries. (Why isn't the Uninstall Software option next to the Install new Software option? -ed)
I then tried to install EGit again and said some plugs were not necessary to be installed because they were already installed (Why won't it let me over write it? -ed). So it let me continue based on the other plugins already being installed.
I restarted as recommended.
I now get this alert and can't open up Flash Builder (Eclipse).
Cannot complete the request. See the error log for details.
"Eclipse EGit" will be ignored because it is already installed.
The log contains this information:
!SESSION 2012-10-17 16:38:16.346 -----------------------------------------------
eclipse.buildId=I20100608-0911
java.version=1.6.0_35
java.vendor=Apple Inc.
BootLoader constants: OS=macosx, ARCH=x86, WS=cocoa, NL=en_US
Framework arguments: -keyring /Users/me/.eclipse_keyring -showlocation
Command-line arguments: -os macosx -ws cocoa -arch x86 -keyring /Users/me/.eclipse_keyring -consoleLog -showlocation
!ENTRY org.eclipse.osgi 4 0 2012-10-17 16:38:16.892
!MESSAGE Application error
!STACK 1
java.lang.IllegalStateException: Unable to acquire application service. Ensure that the org.eclipse.core.runtime bundle is resolved and started (see config.ini).
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:74)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:344)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:622)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577)
at org.eclipse.equinox.launcher.Main.run(Main.java:1410)
*Another developer I know said he tried for a few days to get EGit installed and couldn't. Is this normal? *
Any suggestions?

Answer 1

Did you use the h t t p://download.eclipse.org/egit/updates repository? This seems to be incomplete, see this bug report: https://bugs.eclipse.org/bugs/show_bug.cgi?id=392087.
If you want to install EGit, just use this repository: http://download.eclipse.org/releases/juno/
It contains the latest version of EGit (2.1) plus all necessary dependencies (including JGit).