Bazel: Add support for toolchain_java11

This change also removes the support for building with Java 9
and 10.

Test Plan:

* Run the tests with Java 8 toolchain (the same as before this change):

  $ bazel test //...

* Run the tests with remote Java 11 toolchain (new feature added here):

  $ bazel test --host_javabase=@bazel_tools//tools/jdk:remote_jdk11 \
    --javabase=@bazel_tools//tools/jdk:remote_jdk11 \
    --host_java_toolchain=@bazel_tools//tools/jdk:toolchain_java11 \
    --java_toolchain=@bazel_tools//tools/jdk:toolchain_java11 \
    //...

Change-Id: Ib67dcc50a43f998bc8f5a363a8f681e3693d1f26

BUILD

@@ -4,9 +4,9 @@ load("//tools/bzl:pkg_war.bzl", "pkg_war")
 package(default_visibility = ["//visibility:public"])
 
 config_setting(
-    name = "java9",
+    name = "java11",
     values = {
-        "java_toolchain": "@bazel_tools//tools/jdk:toolchain_java9",
+        "java_toolchain": "@bazel_tools//tools/jdk:toolchain_java11",
     },
 )
 

Documentation/dev-bazel.txt

@@ -31,17 +31,17 @@ To check the installed version of Java, open a terminal window and run:
 
 `java -version`
 
-[[java-10]]
+[[java-12]]
-==== Java 10 support
+==== Java 12 support
 
-Java 10 (and newer) is supported through vanilla java toolchain
+Java 12 (and newer) is supported through vanilla java toolchain
 link:https://docs.bazel.build/versions/master/toolchains.html[Bazel option].
-To build Gerrit with Java 10 and newer, specify vanilla java toolchain and
+To build Gerrit with Java 12 and newer, specify vanilla java toolchain and
 provide the path to JDK home:
 
 ```
   $ bazel build \
-    --define=ABSOLUTE_JAVABASE=<path-to-java-10> \
+    --define=ABSOLUTE_JAVABASE=<path-to-java-12> \
     --host_javabase=@bazel_tools//tools/jdk:absolute_javabase \
     --host_java_toolchain=@bazel_tools//tools/jdk:toolchain_vanilla \
     --java_toolchain=@bazel_tools//tools/jdk:toolchain_vanilla \
@@ -53,7 +53,7 @@ bazel test runs the test using the target javabase:
 
 ```
   $ bazel test \
-    --define=ABSOLUTE_JAVABASE=<path-to-java-10> \
+    --define=ABSOLUTE_JAVABASE=<path-to-java-12> \
     --javabase=@bazel_tools//tools/jdk:absolute_javabase \
     --host_javabase=@bazel_tools//tools/jdk:absolute_javabase \
     --host_java_toolchain=@bazel_tools//tools/jdk:toolchain_vanilla \
@@ -66,7 +66,7 @@ they could be added to ~/.bazelrc resource file:
 
 ```
 $ cat << EOF > ~/.bazelrc
-> build --define=ABSOLUTE_JAVABASE=<path-to-java-10>
+> build --define=ABSOLUTE_JAVABASE=<path-to-java-12>
 > build --javabase=@bazel_tools//tools/jdk:absolute_javabase
 > build --host_javabase=@bazel_tools//tools/jdk:absolute_javabase
 > build --host_java_toolchain=@bazel_tools//tools/jdk:toolchain_vanilla
@@ -78,30 +78,31 @@ Now, invoking Bazel with just `bazel build :release` would include
 all those options.
 
 Note that the follow option must be added to `container.javaOptions`
-in `$gerrit_site/etc/gerrit.config` to run Gerrit with Java 10|11|...:
+in `$gerrit_site/etc/gerrit.config` to run Gerrit with Java 12:
 
 ```
 [container]
   javaOptions = --add-opens=jdk.management/com.sun.management.internal=ALL-UNNAMED
 ```
 
-[[java-9]]
+[[java-11]]
-==== Java 9 support
+==== Java 11 support
 
-Java 9 is supported through alternative java toolchain
+Java 11 is supported through alternative java toolchain
 link:https://docs.bazel.build/versions/master/toolchains.html[Bazel option].
-The Java 9 support is backwards compatible. Java 8 is still the default.
+To build Gerrit with Java 11, specify JDK 11 java toolchain:
-To build Gerrit with Java 9, specify JDK 9 java toolchain:
 
 ```
   $ bazel build \
-      --host_java_toolchain=@bazel_tools//tools/jdk:toolchain_java9 \
+      --host_javabase=@bazel_tools//tools/jdk:remote_jdk11 \
-      --java_toolchain=@bazel_tools//tools/jdk:toolchain_java9 \
+      --javabase=@bazel_tools//tools/jdk:remote_jdk11 \
+      --host_java_toolchain=@bazel_tools//tools/jdk:toolchain_java11 \
+      --java_toolchain=@bazel_tools//tools/jdk:toolchain_java11 \
       :release
 ```
 
 Note that the follow option must be added to `container.javaOptions`
-in `$gerrit_site/etc/gerrit.config` to run Gerrit with Java 9:
+in `$gerrit_site/etc/gerrit.config` to run Gerrit with Java 11:
 
 ```
 [container]

lib/greenmail/BUILD

@@ -17,7 +17,7 @@ java_library(
     data = ["//lib:LICENSE-Apache2.0"],
     exports = ["@greenmail//jar"],
     runtime_deps = select({
-        "//:java9": POST_JDK8_DEPS,
+        "//:java11": POST_JDK8_DEPS,
         "//:java_next": POST_JDK8_DEPS,
         "//conditions:default": [],
     }),

prologtests/examples/BUILD

@@ -7,7 +7,7 @@ DUMMY = ["dummy.sh"]
 sh_test(
     name = "test_examples",
     srcs = select({
-        "//:java9": DUMMY,
+        "//:java11": DUMMY,
         "//:java_next": DUMMY,
         "//conditions:default": ["run.sh"],
     }),

tools/bzl/javadoc.bzl

@@ -80,7 +80,7 @@ _java_doc = rule(
 def java_doc(**kwargs):
     libs = kwargs.get("libs", [])
     libs = libs + select({
-        "//:java9": [],
+        "//:java11": [],
         "//:java_next": [],
         # TODO(davido): Remove this dependency, when Java 8 support is removed.
         # auto-value generates @javax.annotation.Generated annotation on generated

tools/bzl/junit.bzl

@@ -82,7 +82,7 @@ def junit_tests(name, srcs, **kwargs):
     )
     jvm_flags = kwargs.get("jvm_flags", [])
     jvm_flags = jvm_flags + select({
-        "//:java9": POST_JDK8_OPTS,
+        "//:java11": POST_JDK8_OPTS,
         "//:java_next": POST_JDK8_OPTS,
         "//conditions:default": [],
     })