style: bazel: put functions and lists in separate files.

This will allow us to auto-generate the lists (e.g. with cmake) at a
later date if needed to support cmake or the like.

Author: marete

BUILD.bazel

@@ -15,7 +15,8 @@
 load(":bigtable_emulator_common.bzl", "bigtable_emulator_common_hdrs", "bigtable_emulator_common_srcs")
 load(":bigtable_emulator_programs.bzl", "bigtable_emulator_programs")
 load(":bigtable_emulator_test_common.bzl", "bigtable_emulator_test_common_hdrs", "bigtable_emulator_test_common_srcs")
-load(":bigtable_emulator_unit_tests.bzl", "bigtable_emulator_unit_tests", "gen_cc_tests")
+load(":bigtable_emulator_unit_tests.bzl", "bigtable_emulator_unit_tests")
+load(":funcs.bzl", "gen_cc_tests")
 
 cc_library(
     name = "bigtable_emulator_common",

bigtable_emulator_unit_tests.bzl

@@ -23,13 +23,3 @@ bigtable_emulator_unit_tests = [
     "server_test.cc",
     "table_test.cc",
 ]
-
-def gen_cc_tests(srcs, deps = [], copts = []):
-    for src in srcs:
-        test_name = src.replace("/", "_").replace(".cc", "")
-        native.cc_test(
-            name = test_name,
-            srcs = [src],
-            deps = deps,
-            copts = copts,
-        )

funcs.bzl

@@ -0,0 +1,23 @@
+# Copyright 2024 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+def gen_cc_tests(srcs, deps = [], copts = []):
+    for src in srcs:
+        test_name = src.replace("/", "_").replace(".cc", "")
+        native.cc_test(
+            name = test_name,
+            srcs = [src],
+            deps = deps,
+            copts = copts,
+        )