Implement Bazel build for gerrit-war project

Change-Id: I962fccfea823f42be186d518591145c6278021ba

BUILD

@@ -0,0 +1,9 @@
+load('//tools/bzl:genrule2.bzl', 'genrule2')
+
+genrule2(
+  name = 'version',
+  srcs = ['VERSION'],
+  cmd = "grep GERRIT_VERSION $< | cut -d \"'\" -f 2 >$@",
+  out = 'version.txt',
+  visibility = ['//visibility:public'],
+)

gerrit-war/BUILD

@@ -0,0 +1,70 @@
+load('//tools/bzl:genrule2.bzl', 'genrule2')
+
+java_library(
+  name = 'init',
+  srcs = glob(['src/main/java/**/*.java']),
+  deps = [
+    '//gerrit-cache-h2:cache-h2',
+    '//gerrit-extension-api:api',
+    '//gerrit-gpg:gpg',
+    '//gerrit-httpd:httpd',
+    '//gerrit-lucene:lucene',
+    '//gerrit-oauth:oauth',
+    '//gerrit-openid:openid',
+    '//gerrit-pgm:http',
+    '//gerrit-pgm:init',
+    '//gerrit-pgm:init-api',
+    '//gerrit-pgm:util',
+    '//gerrit-reviewdb:server',
+    '//gerrit-server:server',
+    '//gerrit-server/src/main/prolog:common',
+    '//gerrit-sshd:sshd',
+    '//lib:guava',
+    '//lib:gwtorm',
+    '//lib:servlet-api-3_1',
+    '//lib/guice:guice',
+    '//lib/guice:guice-servlet',
+    '//lib/jgit/org.eclipse.jgit:jgit',
+    '//lib/log:api',
+  ],
+  visibility = ['//visibility:public'],
+)
+
+genrule2(
+  name = 'webapp_assets',
+  cmd = 'cd gerrit-war/src/main/webapp; zip -qr $$ROOT/$@ .',
+  srcs = glob(['src/main/webapp/**/*']),
+  out = 'webapp_assets.zip',
+  visibility = ['//visibility:public'],
+)
+
+java_import(
+  name = 'log4j-config',
+  jars = [':log4j-config__jar'],
+  visibility = ['//visibility:public'],
+)
+
+genrule2(
+  name = 'log4j-config__jar',
+  cmd = 'cd gerrit-war/src/main/resources && zip -9Dqr $$ROOT/$@ .',
+  srcs = ['src/main/resources/log4j.properties'],
+  out = 'log4j-config.jar',
+)
+
+java_import(
+  name = 'version',
+  jars = [':gen_version'],
+  visibility = ['//visibility:public'],
+)
+
+genrule2(
+  name = 'gen_version',
+  cmd = ' && '.join([
+    'cd $$TMP',
+    'mkdir -p com/google/gerrit/common',
+    'cat $$ROOT/$(location //:version) >com/google/gerrit/common/Version',
+    'zip -9Dqr $$ROOT/$@ .',
+  ]),
+  tools = ['//:version'],
+  out = 'gen_version.jar',
+)