Kotlin/Bazel: port custom_plugin test to use bazel

java/ql/integration-tests/linux-only/kotlin/custom_plugin/test.py

@@ -1,6 +1,25 @@
 from create_database_utils import *
-import subprocess
 
-subprocess.call("./build_plugin", shell=True)
+import pathlib
+import shutil
+
+this_dir = pathlib.Path(__file__).resolve().parent
+cwd = pathlib.Path.cwd()
+builddir = cwd / 'build'
+
+builddir.mkdir(exist_ok=True)
+
+try:
+    runSuccessfully(['bazel', f'--output_user_root={builddir}', '--max_idle_secs=1', 'build',
+                    '//java/ql/integration-tests/linux-only/kotlin/custom_plugin/plugin', '--spawn_strategy=local',
+                     '--nouse_action_cache', '--noremote_accept_cached', '--noremote_upload_local_results',
+                     f'--symlink_prefix={cwd / "bazel-"}'], cwd=this_dir)
+finally:
+    # rules_python creates a read-only directory in bazel's output, this allows cleanup to succeed
+    runSuccessfully(['chmod', '-R', '+w', builddir])
+
+shutil.copy(
+    'bazel-bin/java/ql/integration-tests/linux-only/kotlin/custom_plugin/plugin/plugin.jar', 'plugin.jar')
+
 run_codeql_database_create(
     ["kotlinc -J-Xmx2G -Xplugin=plugin.jar a.kt b.kt c.kt d.kt e.kt"], lang="java")