migrate examples/models/llama/config (fbcode-only python_unittest)

Differential Revision: D109082042

Pull Request resolved: pytorch#21428

Author: bigfootjon

examples/models/llama/config/BUCK

@@ -0,0 +1,9 @@
+# Any targets that should be shared between fbcode and xplat must be defined in
+# targets.bzl.
+
+load("@fbsource//tools/build_defs:fbsource_utils.bzl", "is_fbcode")
+load(":targets.bzl", "define_common_targets")
+
+oncall("executorch")
+
+define_common_targets(is_fbcode = is_fbcode())

examples/models/llama/config/TARGETS

@@ -1,7 +1,15 @@
 load("@fbsource//xplat/executorch/build:runtime_wrapper.bzl", "runtime")
 load("@fbcode_macros//build_defs:python_unittest.bzl", "python_unittest")
 
-def define_common_targets():
+def define_common_targets(is_fbcode = False):
+    """Defines targets that should be shared between fbcode and xplat.
+
+    Uses fbcode-only python_unittest macro; gate on is_fbcode to preserve
+    pre-migration behavior (this dir was originally TARGETS-only).
+    """
+    if not is_fbcode:
+        return
+
     python_unittest(
         name = "test_llm_config",
         srcs = [