Change-Id: Ief195fb5c55f75172f0428fdac8c8874292ae566

Change-Id: Ie22ac47e315bff76f224214bc042fc483eb01550
Signed-off-by: Robin Rosenberg <robin.rosenberg@dewire.com>

All Git URLs operate off a suffix approach, for example the default
binding is for paths such as:

  */info/refs
  */git-upload-pack
  */git-receive-pack

These names are not common on project hosting servers, especially
one like Gerrit Code Review.

In addition to offering Git-over-HTTP as a servlet, offer it as a
filter that triggers when a matching suffix appears, but otherwise
delegates the request through the chain.  This filter would permit
Gerrit Code Review to place projects at the root of the server,
rather than within the "/p/" subdirectory, making the HTTP and SSH
URL structure exactly match each other.

To prevent breakage with existing users, the MetaServlet and
GitServlet are kept as wrappers delegating to their filters,
returning 404 Not Found when the filter has no match.

Change-Id: I2465c15c086497e0faaae5941159d80c028fa8b1

Permit applications embedding GitServlet to wrap the
info/refs?service=$name and /$name operations with a
servlet Filter.

To help applications inspect state of the operation,
expose the UploadPack or ReceivePack object into a
request attribute.  This can be useful for logging,
or to implement throttling of requests like Gerrit
Code Review uses to prevent server overload.

Change-Id: Ib8773c14e2b7a650769bd578aad745e6651210cb
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

Using a resolver and factory pattern for the anonymous git:// Daemon
class makes transport.Daemon more useful on non-file storage systems,
or in embedded applications where the caller wants more precise
control over the work tasks constructed within the daemon.

Rather than defining new interfaces, move the existing HTTP ones
into transport.resolver and make them generic on the connection
handle type.  For HTTP, continue to use HttpServletRequest, and
for transport.Daemon use DaemonClient.

To remain compatible with transport.Daemon, FileResolver needs to
learn how to use multiple base directories, and how to export any
Repository instance at a fixed name.

Change-Id: I1efa6b2bd7c6567e983fbbf346947238ea2e847e
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

Change-Id: I53f71dc0e3c68839da5ff5a2e0f3eeb8340e4793
Signed-off-by: Robin Rosenberg <robin.rosenberg@dewire.com>

The strings are externalized into the root resource bundles.
The resource bundles are stored under the new "resources" source
folder to get proper maven build.

Strings from tests are, in general, not externalized. Only in
cases where it was necessary to make the test pass the strings
were externalized. This was typically necessary in cases where
e.getMessage() was used in assert and the exception message was
slightly changed due to reuse of the externalized strings.

Change-Id: Ic0f29c80b9a54fcec8320d8539a3e112852a1f7b
Signed-off-by: Sasa Zivkov <sasa.zivkov@sap.com>

Clients can request smart fetch support by examining the info/refs URL
with the service parameter set to the magic git-upload-pack string:

  GET /$GIT_DIR/info/refs?service=git-upload-pack HTTP/1.1

The response is formatted with the upload pack capabilities, using
the standard packet line formatter.  A special header line is put
in front of the standard upload-pack advertisement to let clients
know the service was recognized and is supported.

If the requested service is disabled an authorization status code is
returned, allowing the user agent to retry once they have obtained
credentials from a human, in case authentication is required by
the configured UploadPackFactory implementation.

Change-Id: Ib0f1a458c88b4b5509b0f882f55f83f5752bc57a
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

Clients can request smart push support by examining the info/refs URL
with the service parameter set to the magic git-receive-pack string:

  GET /$GIT_DIR/info/refs?service=git-receive-pack HTTP/1.1

The response is formatted with the receive pack capabilities, using
the standard packet line formatter.  A special header block is put
in front of the standard receive-pack advertisement to let clients
know the service was recognized and is supported.

If the requested service is disabled an authorization status code is
returned, allowing the user agent to retry once they have obtained
credentials from a human, in case authentication is required by
the configured ReceivePackFactory implementation.

Change-Id: Ie4f6e0c7b68a68ec4b7cdd5072f91dd406210d4f
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

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>