extend examples with a feature-flag-selected variant

bazel/rules/rules_score/examples/some_other_library/BUILD

@@ -11,6 +11,7 @@
 # SPDX-License-Identifier: Apache-2.0
 # *******************************************************************************
 
+load("@bazel_skylib//rules:common_settings.bzl", "bool_flag")
 load(
     "@score_tooling//bazel/rules/rules_score:rules_score.bzl",
     "architectural_design",
@@ -67,14 +68,30 @@ dependability_analysis(
     safety_analysis = [":other_library_safety_analysis"],
 )
 
+# Selects the implementation variant; consumers pass --@some_other_library//:use_variant_2=true.
+bool_flag(
+    name = "use_variant_2",
+    build_setting_default = False,
+)
+
+config_setting(
+    name = "is_variant_2",
+    flag_values = {":use_variant_2": "True"},
+)
+
+_VARIANT = select({
+    ":is_variant_2": ["//variants/variant_2:variant"],
+    "//conditions:default": ["//variants/variant_1:variant"],
+})
+
 unit(
     name = "abc",
     scope = ["//:__pkg__"],
     tests = [],
     unit_design = [],
     implementation = [
         ":some_other_library",
-    ],
+    ] + _VARIANT,
 )
 
 component(
@@ -102,5 +119,5 @@ cc_library(
     name = "some_other_library",
     srcs = [],
     visibility = ["//visibility:public"],
-    deps = [],
+    deps = _VARIANT,
 )

bazel/rules/rules_score/examples/some_other_library/MODULE.bazel

@@ -34,4 +34,5 @@ llvm = use_extension(
 llvm.toolchain(llvm_version = "19.1.7")
 use_repo(llvm, "llvm_toolchain", "llvm_toolchain_llvm")
 
+bazel_dep(name = "bazel_skylib", version = "1.8.2")
 bazel_dep(name = "trlc", version = "3.1.1")

bazel/rules/rules_score/examples/some_other_library/variants/variant_1/BUILD

@@ -0,0 +1,19 @@
+# *******************************************************************************
+# Copyright (c) 2026 Contributors to the Eclipse Foundation
+#
+# See the NOTICE file(s) distributed with this work for additional
+# information regarding copyright ownership.
+#
+# This program and the accompanying materials are made available under the
+# terms of the Apache License Version 2.0 which is available at
+# https://www.apache.org/licenses/LICENSE-2.0
+#
+# SPDX-License-Identifier: Apache-2.0
+# *******************************************************************************
+
+# Default variant of other_seooc, selected when //:use_variant_2 is off.
+cc_library(
+    name = "variant",
+    srcs = [],
+    visibility = ["//visibility:public"],
+)

bazel/rules/rules_score/examples/some_other_library/variants/variant_2/BUILD

@@ -0,0 +1,19 @@
+# *******************************************************************************
+# Copyright (c) 2026 Contributors to the Eclipse Foundation
+#
+# See the NOTICE file(s) distributed with this work for additional
+# information regarding copyright ownership.
+#
+# This program and the accompanying materials are made available under the
+# terms of the Apache License Version 2.0 which is available at
+# https://www.apache.org/licenses/LICENSE-2.0
+#
+# SPDX-License-Identifier: Apache-2.0
+# *******************************************************************************
+
+# Alternative variant of other_seooc, selected when //:use_variant_2 is on.
+cc_library(
+    name = "variant",
+    srcs = [],
+    visibility = ["//visibility:public"],
+)