Bazel: Provide toolchain with activated error prone warnings

On recent bazel versions it's trivial to apply package specific checks.
Provide custom java toolchain with all error prone warnings activated.

The list of all error prone warnings was borrowed from here: [1].

Test Plan:

  $ bazel build --java_toolchain //tools:error_prone_warnings_toolchain \
    //...

[1] https://github.com/bazelbuild/BUILD_file_generator/blob/master/tools/bazel_defs/java.bzl

Change-Id: I207a368555bfb7ddab8d782d46d563ce779a6211
Signed-off-by: David Ostrovsky <david@ostrovsky.org>
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>

1 files changed, 107 insertions, 0 deletions

diff --git a/tools/BUILD b/tools/BUILD
index e69de29bb2..84da3a8df8 100644
--- a/tools/BUILD
+++ b/tools/BUILD
@@ -0,0 +1,107 @@
+load(
+    "@bazel_tools//tools/jdk:default_java_toolchain.bzl",
+    "JDK9_JVM_OPTS",
+    "default_java_toolchain",
+)
+
+default_java_toolchain(
+    name = "error_prone_warnings_toolchain",
+    bootclasspath = ["@bazel_tools//tools/jdk:platformclasspath9.jar"],
+    jvm_opts = JDK9_JVM_OPTS,
+    package_configuration = [
+        ":error_prone",
+    ],
+    visibility = ["//visibility:public"],
+)
+
+# This EP warnings list borrowed from here:
+# https://github.com/bazelbuild/BUILD_file_generator/blob/master/tools/bazel_defs/java.bzl
+java_package_configuration(
+    name = "error_prone",
+    javacopts = [
+        "-XepDisableWarningsInGeneratedCode",
+        "-Xep:MissingCasesInEnumSwitch:ERROR",
+        "-Xep:ReferenceEquality:WARN",
+        "-Xep:StringEquality:WARN",
+        "-Xep:WildcardImport:WARN",
+        "-Xep:AmbiguousMethodReference:WARN",
+        "-Xep:BadAnnotationImplementation:WARN",
+        "-Xep:BadComparable:WARN",
+        "-Xep:BoxedPrimitiveConstructor:ERROR",
+        "-Xep:CannotMockFinalClass:WARN",
+        "-Xep:ClassCanBeStatic:WARN",
+        "-Xep:ClassNewInstance:WARN",
+        "-Xep:DefaultCharset:WARN",
+        "-Xep:DoubleCheckedLocking:WARN",
+        "-Xep:ElementsCountedInLoop:WARN",
+        "-Xep:EqualsHashCode:WARN",
+        "-Xep:EqualsIncompatibleType:WARN",
+        "-Xep:ExpectedExceptionChecker:WARN",
+        "-Xep:Finally:WARN",
+        "-Xep:FloatingPointLiteralPrecision:WARN",
+        "-Xep:FragmentInjection:WARN",
+        "-Xep:FragmentNotInstantiable:WARN",
+        "-Xep:FunctionalInterfaceClash:WARN",
+        "-Xep:FutureReturnValueIgnored:WARN",
+        "-Xep:GetClassOnEnum:WARN",
+        "-Xep:ImmutableAnnotationChecker:WARN",
+        "-Xep:ImmutableEnumChecker:WARN",
+        "-Xep:IncompatibleModifiers:WARN",
+        "-Xep:InjectOnConstructorOfAbstractClass:WARN",
+        "-Xep:InputStreamSlowMultibyteRead:WARN",
+        "-Xep:IterableAndIterator:WARN",
+        "-Xep:JUnit3FloatingPointComparisonWithoutDelta:WARN",
+        "-Xep:JUnitAmbiguousTestClass:WARN",
+        "-Xep:LiteralClassName:WARN",
+        "-Xep:MissingFail:WARN",
+        "-Xep:MissingOverride:WARN",
+        "-Xep:MutableConstantField:WARN",
+        "-Xep:NarrowingCompoundAssignment:WARN",
+        "-Xep:NonAtomicVolatileUpdate:WARN",
+        "-Xep:NonOverridingEquals:WARN",
+        "-Xep:NullableConstructor:WARN",
+        "-Xep:NullablePrimitive:WARN",
+        "-Xep:NullableVoid:WARN",
+        "-Xep:OperatorPrecedence:WARN",
+        "-Xep:OverridesGuiceInjectableMethod:WARN",
+        "-Xep:PreconditionsInvalidPlaceholder:WARN",
+        "-Xep:ProtoFieldPreconditionsCheckNotNull:WARN",
+        "-Xep:ProtocolBufferOrdinal:WARN",
+        "-Xep:RequiredModifiers:WARN",
+        "-Xep:ShortCircuitBoolean:WARN",
+        "-Xep:SimpleDateFormatConstant:WARN",
+        "-Xep:StaticGuardedByInstance:WARN",
+        "-Xep:SynchronizeOnNonFinalField:WARN",
+        "-Xep:TruthConstantAsserts:WARN",
+        "-Xep:TypeParameterShadowing:WARN",
+        "-Xep:TypeParameterUnusedInFormals:WARN",
+        "-Xep:URLEqualsHashCode:WARN",
+        "-Xep:UnsynchronizedOverridesSynchronized:WARN",
+        "-Xep:WaitNotInLoop:WARN",
+    ],
+    packages = ["error_prone_packages"],
+)
+
+package_group(
+    name = "error_prone_packages",
+    packages = [
+        "//org.eclipse.jgit/...",
+        "//org.eclipse.jgit.ant/...",
+        "//org.eclipse.jgit.ant.test/...",
+        "//org.eclipse.jgit.archive/...",
+        "//org.eclipse.jgit.http.apache/...",
+        "//org.eclipse.jgit.http.server/...",
+        "//org.eclipse.jgit.http.test/...",
+        "//org.eclipse.jgit.junit/...",
+        "//org.eclipse.jgit.junit.http/...",
+        "//org.eclipse.jgit.lfs/...",
+        "//org.eclipse.jgit.lfs.server/...",
+        "//org.eclipse.jgit.lfs.server.test/...",
+        "//org.eclipse.jgit.lfs.test/...",
+        "//org.eclipse.jgit.packaging/...",
+        "//org.eclipse.jgit.pgm/...",
+        "//org.eclipse.jgit.pgm.test/...",
+        "//org.eclipse.jgit.test/...",
+        "//org.eclipse.jgit.ui/...",
+    ],
+)