Add support for Bazel in Gerrit tree build

Change-Id: I859ef40aca193538d74cd83e7cc0d765f522314d
diff --git a/BUILD b/BUILD
new file mode 100644
index 0000000..d3014d0
--- /dev/null
+++ b/BUILD
@@ -0,0 +1,13 @@
+load("//tools/bzl:plugin.bzl", "gerrit_plugin")
+
+gerrit_plugin(
+    name = "menuextender",
+    srcs = glob(["src/main/java/**/*.java"]),
+    resources = glob(["src/main/**/*"]),
+    gwt_module = "com.googlesource.gerrit.plugins.menuextender.MenuExtenderPlugin",
+    manifest_entries = [
+        "Gerrit-PluginName: menuextender",
+        "Gerrit-Module: com.googlesource.gerrit.plugins.menuextender.Module",
+        "Gerrit-HttpModule: com.googlesource.gerrit.plugins.menuextender.HttpModule",
+    ],
+)
diff --git a/src/main/resources/Documentation/build.md b/src/main/resources/Documentation/build.md
index 76890aa..d98cc31 100644
--- a/src/main/resources/Documentation/build.md
+++ b/src/main/resources/Documentation/build.md
@@ -1,21 +1,23 @@
 Build
 =====
 
-This plugin is built with Buck.
+This plugin is built with Bazel.
 Clone or link this plugin to the plugins directory of Gerrit tree
 and issue the command:
 
 ```
-  buck build plugins/menuextender
+  bazel build plugins/@PLUGIN@
 ```
 
 The output is created in
 
 ```
-  buck-out/gen/plugins/menuextender/menuextender.jar
+  bazel-genfiles/plugins/@PLUGIN@/@PLUGIN@.jar
 ```
 
-This project can be imported into the Eclipse IDE:
+This project can be imported into the Eclipse IDE.
+Add the plugin name to the `CUSTOM_PLUGINS` set in
+Gerrit core in `tools/bzl/plugins.bzl`, and execute:
 
 ```
   ./tools/eclipse/project.py