Write the old object id from the RefUpdate to the
ORIG_HEAD file after the update completes.

Add two new convenience methods to Repository to read
and write the ORIG_HEAD reference similar to the methods
for reading/writing CHERRY_PICK_HEAD and MERGE_HEAD.

Bug: 375525
Change-Id: I120b3b2cd3b1ddae88fce435285bae15cbf96f5e

All commands should throw a GitAPIException so new exceptions can be
added without breaking the builds of old code, i.e. anyone that calls
a Git API should catch GitAPIException and not just the currently known
exceptions.

Now the only checked exceptions on Git API calls are GitException and
subclasses of it. New checked exceptions that are subclasses of
GitException may be added without breaking the API.

Javadoc for GitAPIException is declared on GitCommand and
inherited to subclasses. JGitInternalException is not explicitly
documented anymore.

Unfortunately this change itself breaks the API. The intention is
that it shall be possible to add new checked subclasses of
GitAPIException without breaking the API.

Bug: 366914
EGit-Change-Id: I50380f13fc82c22d0036f47c7859cc3a77e767c5
Change-Id: I50380f13fc82c22d0036f47c7859cc3a77e767c5
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

Overload DirCache.lock to take a repository that is
used for updating smudged index entries with information
from the repository's working tree.

New unit tests are also added for updating smudged index
entries on reset, checkout, and commit.

Change-Id: I88689f26000e4e57e77931e5ace7c804d92af1b6

When reset command was called with tag name as parameter the resulting
HEAD was set to the tag's SHA-1 which is a bug. This patch ensures that
repository.resolve() call always returns commit id.

Change-Id: I219b898c620a75c497c8652dbf4735fd094c4d7c
Signed-off-by: Dariusz Luksza <dariusz@luksza.org>
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

If the ResetCommand should reset to a invalid ref (e.g. HEAD in a repo
whithout a single commit) it was throwing an NPE. This is fixed now by
throwing a JGitInternalExcpeption. It would be nicer if we could throw
a InvalidRefException, but this would modify our API.

Bug: 339610
Change-Id: Iffcb4f2cca9f702176471d93c3a71e5cb3e700b1
Signed-off-by: Christian Halstrick <christian.halstrick@sap.com>
Signed-off-by: Chris Aniszczyk <caniszczyk@gmail.com>

Reset command should works recursively and allows reset all changed
files in given directory.

Bug: 348524
Change-Id: I441db34f226be36548c61cef77958995971498de
Signed-off-by: Dariusz Luksza <dariusz@luksza.org>
Signed-off-by: Chris Aniszczyk <caniszczyk@gmail.com>

Bug: 338701
Change-Id: Id7cbce47131b459e632ddc2c9a94628c7d0b75cd
Signed-off-by: Chris Aniszczyk <caniszczyk@gmail.com>

The reflog message fix was done in
I4f1c3cd6b2cf543be213f061afb94223062dde51

Change-Id: I44817ccf4bf226ed3e4ce6fb2d923e88788221dd
Signed-off-by: Robin Rosenberg <robin.rosenberg@dewire.com>

Bug: 334764
Change-Id: Ice404629687d7f2a595d8d4eccf471b12f7e32ec
Signed-off-by: Chris Aniszczyk <caniszczyk@gmail.com>