Implement Bazel build

To run the tests:

  bazel test //...

To build the Gerrit plugin API, run:

  bazel build gerrit-plugin-api:plugin-api_deploy.jar

To build the Gerrit extension API, run:

  bazel build gerrit-extension-api:extension-api_deploy.jar

TODOs:

Licenses
Reduce visibility (all public for now)
Generate HTML Documentation
Core plugins
gerrit_plugin() rule to build plugins in tree and standalone modes
GWT UI (only gwt_module() skylark rule is provided, no gwt_binary())
PolyGerrit UI
WAR
Publish artifacts to Maven Central
Ask Bazel team to add Gerrit to their CI on ci.bazel.io

Contributed-By: Han-Wen Nienhuys <hanwen@google.com>
Change-Id: I9a86e670882a44a5c966579cdeb8ed79b1590de3
diff --git a/gerrit-pgm/BUILD b/gerrit-pgm/BUILD
new file mode 100644
index 0000000..59b371a
--- /dev/null
+++ b/gerrit-pgm/BUILD
@@ -0,0 +1,161 @@
+load('//tools/bzl:java.bzl', 'java_library2')
+load('//tools/bzl:junit.bzl', 'junit_tests')
+
+SRCS = 'src/main/java/com/google/gerrit/pgm/'
+RSRCS = 'src/main/resources/com/google/gerrit/pgm/'
+
+INIT_API_SRCS = glob([SRCS + 'init/api/*.java'])
+
+BASE_JETTY_DEPS = [
+  '//gerrit-common:server',
+  '//gerrit-extension-api:api',
+  '//gerrit-gwtexpui:linker_server',
+  '//gerrit-gwtexpui:server',
+  '//gerrit-httpd:httpd',
+  '//gerrit-server:server',
+  '//gerrit-sshd:sshd',
+  '//lib:guava',
+  '//lib/guice:guice',
+  '//lib/guice:guice-assistedinject',
+  '//lib/guice:guice-servlet',
+  '//lib/jgit/org.eclipse.jgit:jgit',
+  '//lib/log:api',
+  '//lib/log:log4j',
+]
+
+DEPS = BASE_JETTY_DEPS + [
+  '//gerrit-reviewdb:server',
+  '//lib/log:jsonevent-layout',
+]
+
+java_library(
+  name = 'init-api',
+  srcs = INIT_API_SRCS,
+  deps = DEPS + ['//gerrit-common:annotations'],
+  visibility = ['//visibility:public'],
+)
+
+java_library(
+  name = 'init',
+  srcs = glob([SRCS + 'init/*.java']),
+  resources = glob([RSRCS + 'init/*']),
+  deps = DEPS + [
+    ':init-api',
+    ':util',
+    '//gerrit-common:annotations',
+    '//gerrit-launcher:launcher', # We want this dep to be provided_deps
+    '//gerrit-lucene:lucene',
+    '//lib:args4j',
+    '//lib:derby',
+    '//lib:gwtjsonrpc',
+    '//lib:gwtorm',
+    '//lib:h2',
+    '//lib/commons:validator',
+    '//lib/mina:sshd',
+  ],
+  visibility = ['//visibility:public'],
+)
+
+REST_UTIL_DEPS = [
+  '//gerrit-cache-h2:cache-h2',
+  '//gerrit-util-cli:cli',
+  '//lib:args4j',
+  '//lib:gwtorm',
+  '//lib/commons:dbcp',
+]
+
+java_library(
+  name = 'util',
+  exports = [':util-nodep'],
+  runtime_deps = DEPS + REST_UTIL_DEPS,
+  visibility = ['//visibility:public'],
+)
+
+java_library(
+  name = 'util-nodep',
+  srcs = glob([SRCS + 'util/*.java']),
+  deps = DEPS + REST_UTIL_DEPS, #  We want all these deps to be provided_deps
+  visibility = ['//visibility:public'],
+)
+
+JETTY_DEPS = [
+  '//lib/jetty:jmx',
+  '//lib/jetty:server',
+  '//lib/jetty:servlet',
+]
+
+java_library(
+  name = 'http',
+  runtime_deps = DEPS + JETTY_DEPS,
+  exports = [':http-jetty'],
+  visibility = ['//visibility:public'],
+)
+
+java_library(
+  name = 'http-jetty',
+  srcs = glob([SRCS + 'http/jetty/*.java']),
+  deps = JETTY_DEPS + BASE_JETTY_DEPS + [ # We want all these deps to be provided_deps
+    '//gerrit-launcher:launcher',
+    '//gerrit-reviewdb:client',
+    '//lib:servlet-api-3_1',
+  ],
+  visibility = ['//visibility:public'],
+)
+
+REST_PGM_DEPS = [
+  ':http',
+  ':init',
+  ':init-api',
+  ':util',
+  '//gerrit-cache-h2:cache-h2',
+  '//gerrit-gpg:gpg',
+  '//gerrit-lucene:lucene',
+  '//gerrit-oauth:oauth',
+  '//gerrit-openid:openid',
+  '//lib:args4j',
+  '//lib:gwtorm',
+  '//lib:protobuf',
+  '//lib:servlet-api-3_1-without-neverlink',
+  '//lib/auto:auto-value',
+  '//lib/prolog:cafeteria',
+  '//lib/prolog:compiler',
+  '//lib/prolog:runtime',
+]
+
+java_library(
+  name = 'pgm',
+  resources = glob([RSRCS + '*']),
+  runtime_deps = DEPS + REST_PGM_DEPS + [
+    ':daemon',
+  ],
+  visibility = ['//visibility:public'],
+)
+
+# no transitive deps, used for gerrit-acceptance-framework
+java_library(
+  name = 'daemon',
+  srcs = glob([SRCS + '*.java', SRCS + 'rules/*.java']),
+  resources = glob([RSRCS + '*']),
+  deps = DEPS + REST_PGM_DEPS + [ # We want all these deps to be provided_deps
+    '//gerrit-launcher:launcher',
+  ],
+  visibility = ['//visibility:public'],
+)
+
+junit_tests(
+  name = 'pgm_tests',
+  srcs = glob(['src/test/java/**/*.java']),
+  deps = [
+    ':init',
+    ':init-api',
+    ':pgm',
+    '//gerrit-common:server',
+    '//gerrit-server:server',
+    '//lib:guava',
+    '//lib:junit',
+    '//lib/easymock:easymock',
+    '//lib/guice:guice',
+    '//lib/jgit/org.eclipse.jgit:jgit',
+    '//lib/jgit/org.eclipse.jgit.junit:junit',
+  ],
+)