Bug: 500059
Change-Id: I47f3f6749a67da52029f84e002d9b155ed56d2b7
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

Remove all proxy rules, that were introduced to allow to build Gerrit
with hijacked JGit cell. New approach suggested in: [1], that emulates
real JGit project structure in its own cell, makes them unnecessary.

Add :all rule, that build all artifacts and packages them in zip file.
Add shell binary :jgit_bin rule, that allows to execute JGit binary
from with buck run command, e.g.:

  $ buck run jgit_bin status
  $ buck run jgit_bin -- --version

* [1] https://gerrit-review.googlesource.com/74859

Change-Id: Idf9ecb783cbd2b9984d4118047968f1f5204d642
Signed-off-by: David Ostrovsky <david@ostrovsky.org>

Change-Id: I6aa2a8f094d36ef04dd12c81dfba8328e4a3bee9

Compile each test in its own java_test() target so they can run in
parallel, reducing total time spent testing on large machines.

$ buck test --all
[-] PROCESSING BUCK FILES...FINISHED 0.3s [100%]
[-] BUILDING...FINISHED 2.9s [100%] (351/383 JOBS, 351 UPDATED, 0.0% CACHE MISS)
[-] TESTING...FINISHED 98.1s (3360 PASS/15 SKIP/0 FAIL)

Change-Id: I8d6541268315089299f933ed23d785b1b3431133

Today there are plenty of modern build tool systems available in the
wild (in no particular order):

* http://bazel.io
* https://pantsbuild.github.io
* http://shakebuild.com
* https://ninja-build.org
* https://buckbuild.com

The attributes, that all these build tools have in common, are:

* reliable
* correct
* very fast
* reproducible

It must not always be the other build tool, this project is currently
using. Or, quoting Gerrit Code Review maintainer here:

  "Friends, don't let friends use <the other build tool system>!"

This change is non-complete implementation of JGit build in Buck,
needed by Gerrit Code Review to replace its dependency with standlone
JGit cell. This is very useful when a developer is working on both
projects and is trying to integrate changes made in JGit in Gerrit.

The supported workflow is:

  $ cd jgit
  $ emacs <hack>
  $ cd ../gerrit
  $ buck build --config repositories.jgit=../jgit gerrit

With --config repositories.jgit=../jgit jgit cell is routed through
JGit development tree.

To build jgit, issue:

  $ buck build //:jgit
  [-] PROCESSING BUCK FILES...FINISHED 0,0s

Yes, you can't measure no-op build time, given that Buck daemon is
used.

Change-Id: I301a71b19fba35a5093d8cc64d4ba970c2877a44
Signed-off-by: David Ostrovsky <david@ostrovsky.org>