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

Checkout command should throw o.e.j.api.errors.CheckoutConflictException
which is a GitAPIException not o.e.j.errors.CheckoutConflictException.
PullCommand should rethrow the API exception as a JGitInternalException.

Bug: 356922
Change-Id: I865c4905997d9834c85a97fbe7287604daf99075
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

Most unexpected exceptions are completely useless yielding message
like "null" or "3" or in the best cases something reasonable, but
still out of context.

Just declare the test as throwing an exception. That will retain
the full stack trace leading to the point of failure without using
a debugger or changing the code.

Change-Id: Id2454d328d1aa665606ae002de2c3805fe7baa8e

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>

Checkout of remote tracking branch failed when no local branch
existed. Also enhance RepositoryTestCase to enable checking index
state of another test repository.

Bug: 337695
Change-Id: Idf4c05bdf23b5161688818342b2bf9a45b49f479
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

Eclipse has some problem re-running single JUnit tests if
the tests are in Junit 3 format, but the JUnit 4 launcher
is used. This was quite unnecessary and the move was not
completed. We still have no JUnit4 test.

This completes the extermination of JUnit3. Most of the
work was global searce/replace using regular expression,
followed by numerous invocarions of quick-fix and organize
imports and verification that we had the same number of
tests before and after.

- Annotations were introduced.
- All references to JUnit3 classes removed
- Half-good replacement for getting the test name. This was
  needed to make the TestRngs work. The initialization of
  TestRngs was also made lazily since we can not longer find
  out the test name in runtime in the @Before methods.
- Renamed test classes to end with Test, with the exception
  of TestTranslateBundle, which fails from Maven
- Moved JGitTestUtil to the junit support bundle

Change-Id: Iddcd3da6ca927a7be773a9c63ebf8bb2147e2d13
Signed-off-by: Robin Rosenberg <robin.rosenberg@dewire.com>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

As discussed in

http://egit.eclipse.org/r/#change,2127

we should use paths relative the working directory instead of Files to
notify the caller about conflicts and nondeleted files.

Change-Id: I034c7bd846f0df78d97bc246f38d411f29713dde
Signed-off-by: Mathias Kinzler <mathias.kinzler@sap.com>

Change-Id: Ieacae01de20d7729ef34e6e6a1523fbaf9db41a8
Signed-off-by: Mathias Kinzler <mathias.kinzler@sap.com>

The CheckoutCommand does not handle names other than local branch
names properly; it must detach HEAD if such a name is encountered (for
example a commit ID or a remote tracking branch).

Change-Id: I5d55177f4029bcc34fc2649fd564b125a2929cc4
Signed-off-by: Mathias Kinzler <mathias.kinzler@sap.com>
Signed-off-by: Chris Aniszczyk <caniszczyk@gmail.com>

This is needed by callers to determine checkout conflicts and
possible files that were not deleted during the checkout so that they
can present the end user with a better Exception description and retry
to delete the undeleted files later, respectively.

Change-Id: I037930da7b1a4dfb24cfa3205afb51dc29e4a5b8
Signed-off-by: Mathias Kinzler <mathias.kinzler@sap.com>

Add the ability to checkout a branch to the working tree.

Bug: 330860
Change-Id: Ie06b9e799a9e1be384da0b8996efa7209b32eac3
Signed-off-by: Chris Aniszczyk <caniszczyk@gmail.com>

Bug: 330827
Change-Id: I0b74bb92254d0ee988139d25022d06d16ed89d58
Signed-off-by: Chris Aniszczyk <caniszczyk@gmail.com>

This is a simple HTTP server that provides the minimum server side
support required for dumb (non-git aware) transport clients.

We produce the info/refs and objects/info/packs file on the fly
from the local repository state, but otherwise serve data as raw
files from the on-disk structure.

In the future we could better optimize the FileSender class and the
servlets that use it to take advantage of direct file to network
APIs in more advanced servlet containers like Jetty.

Our glue package borrows the idea of a micro embedded DSL from
Google Guice and uses it to configure a collection of Filters
and HttpServlets, all of which are matched against requests using
regular expressions.  If a subgroup exists in the pattern, it is
extracted and used for the path info component of the request.

Change-Id: Ia0f1a425d07d035e344ae54faf8aeb04763e7487
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

Per CQ 3448 this is the initial contribution of the JGit project
to eclipse.org.  It is derived from the historical JGit repository
at commit 3a2dd9921c.

Signed-off-by: Shawn O. Pearce <spearce@spearce.org>