From 29616b1cf715915ba45abb895935d868788b6056 Mon Sep 17 00:00:00 2001
From: MohitMaliFtechiz <futuretechnoworld.mohit@gmail.com>
Date: Thu, 2 Jan 2025 11:46:41 +0530
Subject: [PATCH] Fixed: Reproducible Builds.

* To generate the APK for a specific date, set the "RELEASE_DATE" environment variable in the format `YYYY-MM-DD`. The APK will be generated for the specified date. If the variable is not set, the APK will be generated for the current date.
---
 buildSrc/src/main/kotlin/VersionCodeGenerator.kt | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/buildSrc/src/main/kotlin/VersionCodeGenerator.kt b/buildSrc/src/main/kotlin/VersionCodeGenerator.kt
index 269b31198..aa5355415 100644
--- a/buildSrc/src/main/kotlin/VersionCodeGenerator.kt
+++ b/buildSrc/src/main/kotlin/VersionCodeGenerator.kt
@@ -23,9 +23,18 @@ fun String.getVersionCode(): Int {
   // the date when the automatic version code generation started
   val lastDate = LocalDate.of(2024, 7, 17)
 
+  // Get the current date. If the "RELEASE_DATE" environment variable is set(in YYYY-MM-DD format).
+  // it uses the specified date to generate the APK version code.
+  // Otherwise, it generates the version code based on the current date.
+  // See https://github.com/kiwix/kiwix-android/issues/4120 for more details.
+  val currentDate = if (!System.getenv("RELEASE_DATE").isNullOrEmpty()) {
+    LocalDate.parse(System.getenv("RELEASE_DATE"))
+  } else {
+    LocalDate.now()
+  }
   // Calculate the number of days between the lastDate and today's date.
   // This gives us the total number of days since the last version code was set.
-  val daysDifference = ChronoUnit.DAYS.between(lastDate, LocalDate.now()).toInt()
+  val daysDifference = ChronoUnit.DAYS.between(lastDate, currentDate).toInt()
 
   // Base version code. This is the version code of the last release uploaded to the Play Store.
   // We use this as the starting point for generating new version codes automatically.