Add the cts-platform-version check

Added the cts-platform-version check when the cts directory exists.

Bug: 194402596
Test: manually modified the ifeq condition to check error message
Test: TreeHugger
Change-Id: I613ac5b5014dbf4e6202e1dbd1b6a92359817cf2
Merged-In: I613ac5b5014dbf4e6202e1dbd1b6a92359817cf2
diff --git a/core/tasks/cts.mk b/core/tasks/cts.mk
index fdd9591..dccf14f 100644
--- a/core/tasks/cts.mk
+++ b/core/tasks/cts.mk
@@ -25,3 +25,35 @@
 
 .PHONY: cts_v2
 cts_v2: cts
+
+# platform version check (b/32056228)
+# ============================================================
+ifneq (,$(wildcard cts/))
+  cts_platform_version_path := cts/tests/tests/os/assets/platform_versions.txt
+  cts_platform_version_string := $(shell cat $(cts_platform_version_path))
+  cts_platform_release_path := cts/tests/tests/os/assets/platform_releases.txt
+  cts_platform_release_string := $(shell cat $(cts_platform_release_path))
+
+  ifeq (,$(findstring $(PLATFORM_VERSION),$(cts_platform_version_string)))
+    define error_msg
+      ============================================================
+      Could not find version "$(PLATFORM_VERSION)" in CTS platform version file:
+      $(cts_platform_version_path)
+      Most likely PLATFORM_VERSION in build/core/version_defaults.mk
+      has changed and a new version must be added to this CTS file.
+      ============================================================
+    endef
+    $(error $(error_msg))
+  endif
+  ifeq (,$(findstring $(PLATFORM_VERSION_LAST_STABLE),$(cts_platform_release_string)))
+    define error_msg
+      ============================================================
+      Could not find version "$(PLATFORM_VERSION_LAST_STABLE)" in CTS platform release file:
+      $(cts_platform_release_path)
+      Most likely PLATFORM_VERSION_LAST_STABLE in build/core/version_defaults.mk
+      has changed and a new version must be added to this CTS file.
+      ============================================================
+    endef
+    $(error $(error_msg))
+  endif
+endif