commit 3a86868c0883d2a564db88bf9ae4a5fe235bb63f
author Sasa Zivkov <sasa.zivkov@sap.com> Fri Mar 25 14:28:56 2011 +0100
committer Sasa Zivkov <sasa.zivkov@sap.com> Fri Mar 25 15:02:49 2011 +0100
tree 85dc0137dc60870b86e90d2804b273b7c7307411
parent 55b7bd247ef86c6650c9acc364f426cec38723b5

Detaching HEAD when checking out the same commit.

Detaching HEAD didn't work in some corner checkout cases.  If, for example,
HEAD is symbolic ref to refs/heads/master, refs/heads/master is ref to commit
c0ffee... then:

    checkout c0ffee...

would leave the HEAD unchanged.

The same symptom occurs when checking out a remote tracking branch or a tag
that references the same commit as refs/heads/master.

In the above case, the RefUpdate class didn't have enough information to decide
if the update needed to detach symbolic ref because it dealt only with new/old
objectIDs. Therefore, this fix introduced the RefUpdate.detachingSymbolicRef
flag.

Bug: 315166
Change-Id: I085c98b77ea8f9104a213978ea0d4ac6fd58f49b
Signed-off-by: Sasa Zivkov <sasa.zivkov@sap.com>