The tortoiseplink command does not understand -batch, even though
it smells like the putty plink command that does use it.  Don't add
-batch if GIT_SSH is tortoiseplink.

Change-Id: I638532a02faa2caf8c39d482094e7ff4f4ec7e78
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

When GIT_SSH is set to use plink, the correct option name is "-batch"
and not "--batch".  This was a typo introduced when we added support
for plink via GIT_SSH.

Change-Id: I391660e38f5d208bba11e3f2a8f25922de2af878
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

If the environment variable GIT_SSH is set, use GIT_SSH for any remote
protocol connections, instead of the local JSch library.

Bug: 321062
Change-Id: Ia18ea49d58f3ed657430067f1f72ef788a2dae4c
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

In order to honor GIT_SSH the TransportGitSsh class needs to run the
process named by the GIT_SSH environment variable and use that as the
pipes for connectivity to the remote peer.  Refactor the current
transport code to support a different type of pipe connectivity, so we
can later add GIT_SSH.

Bug: 321062
Change-Id: I9d8ee1a95f1bac5013b33a4a42dcf1f98f92172f
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

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>

In close() method of SshFetchConnection and SshPushConnection
errorThread.join() can wait forever if JSch will not close the
channel's error stream.  Join with a timeout, and interrupt the
copy thread if its blocked on data that will never arrive.

Bug: 312863
Change-Id: I763081267653153eed9cd7763a015059338c2df8
Reported-by: Dmitry Neverov <dmitry.neverov@gmail.com>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

JSch may hang or abort with the timeout if JGit connects before
its obtained the streams.  Instead defer the connect() call until
after the streams have been configured.

Bug: 312383
Change-Id: I7c3a687ba4cb69a41a85e2b60d381d42b9090e3f
Reported-by: Dmitry Neverov <dmitry.neverov@gmail.com>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

When listing branches, EGit only reads the advertisement and
then disconnects.  When it closes down the pack channel the remote
side is waiting for the client to send our list of commands, or a
flush-pkt to let it know there is nothing to do.

However if an error thread is open watching the SSH stderr stream,
we ask for it to finish before we send the flush-pkt.  Unfortunately
the thread won't terminate until the main output stream closes,
which is waiting for the flush-pkt.  A classic network deadlock.

If the output stream needs a flush-pkt we send it before we wait
for the error stream to close.  If the flush-pkt is rejected, we
close down the output stream early, assuming that the remote side
is broken and we will get error information soon.

Change-Id: I8d078a339077756220c113f49d206b1bf295d434
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

JSch will allow us to close the connection and then just drop
any late messages coming over the stderr stream for the command.
This makes it easy to lose final output on a command, like from
Gerrit Code Review's post receive hook.

Instead spawn a background thread to copy data from JSch's pipe
into our own buffer, and wait for that thread to receive EOF on the
pipe before we declare the connection closed. This way we don't
have a race condition between the stderr data arriving and JSch
just tearing down the channel.

Change-Id: Ica1ba40ed2b4b6efb7d5e4ea240efc0a56fb71f6
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

Any messages received on side band #2 that aren't scraped as a
progress message into our ProgressMonitor are now forwarded to a
buffer which is later included into the OperationResult object.
Application callers can use this buffer to present the additional
messages from the remote peer after the push or fetch operation
has concluded.

The smart push connections using the native send-pack/receive-pack
protocol now request side-band-64k capability if it is available
and forward any messages received through that channel onto this
message buffer.  This makes hook messages available over smart HTTP,
or even over SSH.

The SSH transport was modified to redirect the remote command's
stderr stream into the message buffer, interleaved with any data
received over side band #2.  Due to buffering between these two
different channels in the SSH channel mux itself the order of any
writes between the two cannot be ensured, but it tries to stay close.

The local fork transport was also modified to redirect the local
receive-pack's stderr into the message buffer, rather than going to
the invoking JVM's System.err.  This gives applications a chance
to log the local error messages, rather than needing to redirect
their JVM's stderr before startup.

To keep things simple, the application has to wait for the entire
operation to complete before it can see the messages.  This may
be a downside if the user is trying to debug a remote hook that is
blocking indefinitely, the user would need to abort the connection
before they can inspect the message buffer in any sort of UI built
on top of JGit.

Change-Id: Ibc215f4569e63071da5b7e5c6674ce924ae39e11
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

If remote.name.uploadpack or .receivepack is misconfigured and points
to a non-existent command on the remote system, we should receive back
exit status 127.  Report this case specially with the command we used
so the user knows what is going.

Bug: 293703
Change-Id: I7504e7b6238d5d8e698d37db7411c4817a039d08
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>