From 582e2059d8887af985c7236f18eda892d0e302f4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Kuba=20Szczodrzy=C5=84ski?= <kuba@szczodrzynski.pl>
Date: Mon, 5 Apr 2021 20:00:38 +0200
Subject: [PATCH] [App] Move buildTimestamp to manifest to improve build
 performance.

---
 app/build.gradle                                         | 4 +++-
 app/src/main/AndroidManifest.xml                         | 2 ++
 .../edziennik/utils/managers/BuildManager.kt             | 9 ++++++++-
 3 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/app/build.gradle b/app/build.gradle
index f49a6dad..72c03e94 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -18,8 +18,10 @@ android {
         versionName release.versionName
 
         buildConfigField "java.util.Map<String, String>", "GIT_INFO", gitInfoMap
-        buildConfigField "long", "BUILD_TIMESTAMP", String.valueOf(System.currentTimeMillis())
         buildConfigField "String", "VERSION_BASE", "\"${release.versionName}\""
+        manifestPlaceholders = [
+                buildTimestamp: String.valueOf(System.currentTimeMillis())
+        ]
 
         multiDexEnabled = true
 
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 5f295533..af4b653a 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -29,6 +29,8 @@
         android:usesCleartextTraffic="true"
         tools:ignore="UnusedAttribute">
 
+        <meta-data android:name="buildTimestamp" android:value="${buildTimestamp}" />
+
         <!--  __  __       _                      _   _       _ _
              |  \/  |     (_)           /\       | | (_)     (_) |
              | \  / | __ _ _ _ __      /  \   ___| |_ ___   ___| |_ _   _
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/utils/managers/BuildManager.kt b/app/src/main/java/pl/szczodrzynski/edziennik/utils/managers/BuildManager.kt
index 8d50a948..ab126826 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/utils/managers/BuildManager.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/utils/managers/BuildManager.kt
@@ -4,6 +4,7 @@
 
 package pl.szczodrzynski.edziennik.utils.managers
 
+import android.content.pm.PackageManager
 import android.text.TextUtils
 import androidx.appcompat.app.AlertDialog
 import androidx.appcompat.app.AppCompatActivity
@@ -26,12 +27,18 @@ class BuildManager(val app: App) : CoroutineScope {
 
     val buildFlavor = BuildConfig.FLAVOR
     val buildType = BuildConfig.BUILD_TYPE
-    val buildTimestamp = BuildConfig.BUILD_TIMESTAMP
     val isRelease = !BuildConfig.DEBUG
     val isDebug = BuildConfig.DEBUG
     val isNightly = BuildConfig.VERSION_NAME.contains("nightly")
     val isDaily = BuildConfig.VERSION_NAME.contains("daily")
 
+    val buildTimestamp: Long
+        get() {
+            val info = app.packageManager.getApplicationInfo(app.packageName, PackageManager.GET_META_DATA)
+            val metadata = info.metaData
+            return metadata?.getFloat("buildTimestamp")?.toLong() ?: 0
+        }
+
     val gitHash = BuildConfig.GIT_INFO["hash"]
     val gitVersion = BuildConfig.GIT_INFO["version"]
     val gitBranch = BuildConfig.GIT_INFO["branch"]