From e7b66e100f80474470f79a9b4670523c2d156a96 Mon Sep 17 00:00:00 2001
From: Dan Pasanen <dan.pasanen@gmail.com>
Date: Wed, 20 Dec 2017 20:32:25 -0600
Subject: install: ignore build dates for A/B installs

* Assume a user knows what they are flashing and skip the check
  of whether or not the build they are flashing is older than the
  TWRP image they are using (which really isn't at all relevant
  to the ROM's build date anyway).

Change-Id: I74ca5a6dc604268bf38f85ec1861f3eaafd9bf06
---
 install.cpp        | 22 ----------------------
 installcommand.cpp | 24 ------------------------
 2 files changed, 46 deletions(-)

diff --git a/install.cpp b/install.cpp
index 7fbf5c01f..4848755ab 100644
--- a/install.cpp
+++ b/install.cpp
@@ -178,28 +178,6 @@ static int check_newer_ab_build(ZipArchiveHandle zip) {
     return INSTALL_ERROR;
   }
 
-  // Check for downgrade version.
-  int64_t build_timestamp =
-      android::base::GetIntProperty("ro.build.date.utc", std::numeric_limits<int64_t>::max());
-  int64_t pkg_post_timestamp = 0;
-  // We allow to full update to the same version we are running, in case there
-  // is a problem with the current copy of that version.
-  if (metadata["post-timestamp"].empty() ||
-      !android::base::ParseInt(metadata["post-timestamp"].c_str(), &pkg_post_timestamp) ||
-      pkg_post_timestamp < build_timestamp) {
-    if (metadata["ota-downgrade"] != "yes") {
-      LOG(ERROR) << "Update package is older than the current build, expected a build "
-                    "newer than timestamp "
-                 << build_timestamp << " but package has timestamp " << pkg_post_timestamp
-                 << " and downgrade not allowed.";
-      return INSTALL_ERROR;
-    }
-    if (pkg_pre_build_fingerprint.empty()) {
-      LOG(ERROR) << "Downgrade package must have a pre-build version set, not allowed.";
-      return INSTALL_ERROR;
-    }
-  }
-
   return 0;
 }
 
diff --git a/installcommand.cpp b/installcommand.cpp
index f9978f27b..b306e872f 100644
--- a/installcommand.cpp
+++ b/installcommand.cpp
@@ -159,30 +159,6 @@ static int check_newer_ab_build(ZipWrap* zip)
         return INSTALL_ERROR;
     }
 
-    // Check for downgrade version.
-    int64_t build_timestampt = property_get_int64(
-            "ro.build.date.utc", std::numeric_limits<int64_t>::max());
-    int64_t pkg_post_timespampt = 0;
-    // We allow to full update to the same version we are running, in case there
-    // is a problem with the current copy of that version.
-    if (metadata["post-timestamp"].empty() ||
-        !android::base::ParseInt(metadata["post-timestamp"].c_str(),
-                                 &pkg_post_timespampt) ||
-        pkg_post_timespampt < build_timestampt) {
-        if (metadata["ota-downgrade"] != "yes") {
-            printf("Update package is older than the current build, expected a "
-                 "build newer than timestamp %" PRIu64 " but package has "
-                 "timestamp %" PRIu64 " and downgrade not allowed.\n",
-                 build_timestampt, pkg_post_timespampt);
-            return INSTALL_ERROR;
-        }
-        if (pkg_pre_build_fingerprint.empty()) {
-            printf("Downgrade package must have a pre-build version set, not "
-                 "allowed.\n");
-            return INSTALL_ERROR;
-        }
-    }
-
     return 0;
 }
 
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