From 717d9d3ae2d2e8d000dad0eb0454658678b79f2f Mon Sep 17 00:00:00 2001
From: Tao Bao <tbao@google.com>
Date: Tue, 29 May 2018 11:18:02 -0700
Subject: [PATCH] Expose PLATFORM_SECURITY_PATCH_TIMESTAMP.

We have use case that uses the timestamp for PLATFORM_SECURITY_PATCH in
device specific Makefile, but need to handle the platform-dependent
`date` command. This CL computes and exposes
PLATFORM_SECURITY_PATCH_TIMESTAMP from the core build system.

Bug: 80311893
Test: Use PLATFORM_SECURITY_PATCH_TIMESTAMP in device-specific folder,
      on both of Linux and macOS. Check the value.
Change-Id: I27a88dcebde7a1c204491f5f5c45c5160398dbb6
---
 core/version_defaults.mk | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index 8c36359ae..ec0bfcd5a 100644
--- a/core/version_defaults.mk
+++ b/core/version_defaults.mk
@@ -258,6 +258,16 @@ ifndef PLATFORM_SECURITY_PATCH
 endif
 .KATI_READONLY := PLATFORM_SECURITY_PATCH
 
+ifndef PLATFORM_SECURITY_PATCH_TIMESTAMP
+  # Used to indicate the matching timestamp for the security patch string in PLATFORM_SECURITY_PATCH.
+  ifneq (,$(findstring Darwin,$(UNAME)))
+    PLATFORM_SECURITY_PATCH_TIMESTAMP := $(shell date -jf '%Y-%m-%d %T %Z' '$(PLATFORM_SECURITY_PATCH) 00:00:00 GMT' +%s)
+  else
+    PLATFORM_SECURITY_PATCH_TIMESTAMP := $(shell date -d 'TZ="GMT" $(PLATFORM_SECURITY_PATCH)' +%s)
+  endif
+endif
+.KATI_READONLY := PLATFORM_SECURITY_PATCH_TIMESTAMP
+
 ifndef PLATFORM_BASE_OS
   # Used to indicate the base os applied to the device.
   # Can be an arbitrary string, but must be a single word.