[java] NullAway added for the entire project

Author: mk868

.github/workflows/ci-java.yml

@@ -71,3 +71,11 @@ jobs:
       java-version: 17
       run: |
         bazel test --flaky_test_attempts 3 //java/test/org/openqa/selenium/chrome:ChromeDriverFunctionalTest-remote
+
+  nullaway-checks:
+    name: NullAway Checks
+    uses: ./.github/workflows/bazel.yml
+    with:
+      name: NullAway Checks
+      java-version: 17
+      run: bazel build //java/... --//java:nullaway_level=ERROR

java/BUILD.bazel

@@ -1,5 +1,6 @@
 load("@contrib_rules_jvm//java:defs.bzl", "spotbugs_config")
 load(":defs.bzl", "artifact")
+load("@bazel_skylib//rules:common_settings.bzl", "string_flag")
 
 exports_files(
     srcs = [
@@ -53,3 +54,23 @@ spotbugs_config(
         "//visibility:public",
     ],
 )
+
+string_flag(
+    name = "nullaway_level",
+    values = ["NONE", "WARN", "ERROR"],
+    build_setting_default = "NONE",
+)
+
+config_setting(
+    name = "use_nullaway_level_warn",
+    flag_values = {
+        ":nullaway_level": "WARN",
+    },
+)
+
+config_setting(
+    name = "use_nullaway_level_error",
+    flag_values = {
+        ":nullaway_level": "ERROR",
+    },
+)

java/private/export.bzl

@@ -7,6 +7,7 @@ load("@rules_jvm_external//private/rules:maven_bom_fragment.bzl", "maven_bom_fra
 load("@rules_jvm_external//private/rules:maven_project_jar.bzl", "maven_project_jar")
 load("@rules_jvm_external//private/rules:maven_publish.bzl", "maven_publish")
 load("//java/private:module.bzl", "java_module")
+load(":java_library.bzl", "java_library")
 
 def java_export(
         name,
@@ -24,7 +25,7 @@ def java_export(
     lib_name = "%s-lib" % name
 
     # Construct the java_library we'll export from here.
-    native.java_library(
+    java_library(
         name = lib_name,
         tags = tags,
         exports = exports,

java/private/java_library.bzl

@@ -0,0 +1,52 @@
+load(
+    "@contrib_rules_jvm//java:defs.bzl",
+    _java_library = "java_library"
+)
+
+def java_library(
+        name,
+        deps = [],
+        srcs = [],
+        exports = [],
+        tags = [],
+        visibility = None,
+        javacopts = [],
+        plugins = [],
+        **kwargs):
+
+    # NullAway configuration
+    nullaway_plugins = select({
+        "//java:use_nullaway_level_warn": [
+            "//java:nullaway"
+        ],
+        "//java:use_nullaway_level_error": [
+            "//java:nullaway"
+        ],
+        "//conditions:default": [],
+    })
+    nullaway_javacopts = select({
+        "//java:use_nullaway_level_warn": [
+            '-Xep:NullAway:WARN',
+            '-XepOpt:NullAway:AnnotatedPackages=org.openqa.selenium',
+            '-XepOpt:NullAway:JSpecifyMode=true'
+        ],
+        "//java:use_nullaway_level_error": [
+            '-Xep:NullAway:ERROR',
+            '-XepOpt:NullAway:AnnotatedPackages=org.openqa.selenium',
+            '-XepOpt:NullAway:JSpecifyMode=true'
+        ],
+        "//conditions:default": [],
+    })
+
+    # global place for NullAway plugin use
+    _java_library(
+        name = name,
+        deps = deps,
+        srcs = srcs,
+        exports = exports,
+        tags = tags,
+        visibility = visibility,
+        plugins = plugins + nullaway_plugins,
+        javacopts = javacopts + nullaway_javacopts,
+        **kwargs
+    )

java/private/library.bzl

@@ -1,9 +1,9 @@
 load(
     "@contrib_rules_jvm//java:defs.bzl",
-    _java_library = "java_library",
     _java_test = "java_test",
 )
 load(":export.bzl", _java_export = "java_export")
+load(":java_library.bzl", _java_library = "java_library")
 
 java_export = _java_export
 java_library = _java_library

java/src/org/openqa/selenium/BUILD.bazel

@@ -38,14 +38,6 @@ java_export(
         ":manifest",
         artifact("org.jspecify:jspecify"),
     ],
-    plugins = [
-        "//java:nullaway"
-    ],
-    javacopts = [
-        '-Xep:NullAway:WARN',
-        '-XepOpt:NullAway:AnnotatedPackages=org.openqa.selenium',
-        '-XepOpt:NullAway:JSpecifyMode=true'
-    ],
 )
 
 java_export(

java/src/org/openqa/selenium/support/BUILD.bazel

@@ -36,14 +36,6 @@ java_export(
         "//java/src/org/openqa/selenium/support/ui:elements",
         "//java/src/org/openqa/selenium/support/ui:wait",
     ],
-    plugins = [
-        "//java:nullaway"
-    ],
-    javacopts = [
-        '-Xep:NullAway:WARN',
-        '-XepOpt:NullAway:AnnotatedPackages=org.openqa.selenium',
-        '-XepOpt:NullAway:JSpecifyMode=true'
-    ],
 )
 
 java_library(
@@ -66,12 +58,4 @@ java_library(
         "//java/src/org/openqa/selenium:core",
         "//java/src/org/openqa/selenium/support/ui:components",
     ],
-    plugins = [
-        "//java:nullaway"
-    ],
-    javacopts = [
-        '-Xep:NullAway:WARN',
-        '-XepOpt:NullAway:AnnotatedPackages=org.openqa.selenium',
-        '-XepOpt:NullAway:JSpecifyMode=true'
-    ],
 )