tree 85dc0137dc60870b86e90d2804b273b7c7307411
parent 55b7bd247ef86c6650c9acc364f426cec38723b5
author Sasa Zivkov <sasa.zivkov@sap.com> 1301059736 +0100
committer Sasa Zivkov <sasa.zivkov@sap.com> 1301061769 +0100

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>