From e90053626483ce635f6fcc9f621443174d7aa49d Mon Sep 17 00:00:00 2001
From: Sergey Ponomarev <stokito@gmail.com>
Date: Sun, 13 Oct 2024 14:29:24 +0200
Subject: [PATCH] [MNG-8258] Change the fixed reproducible build
 outputTimestamp to 1 Feb 1980

The Maven used the year 2001 (beginning of 21st century).
But the Gradle already use the 1 Feb 1980 for preserveFileTimestamps.

The 1 Jan 1980 is a minimal date in Zip archive but the 1 Jan has some special treatment by Java that's why the Gradle team used the 1 Feb.

See more detailed description in CONSTANT_TIME_FOR_ZIP_ENTRIES
https://github.com/gradle/gradle/blob/master/platforms/core-runtime/files/src/main/java/org/gradle/api/internal/file/archive/ZipEntryConstants.java#L39

Signed-off-by: Sergey Ponomarev <stokito@gmail.com>
---
 .../src/main/resources/org/apache/maven/model/pom-4.0.0.xml    | 3 ++-
 .../src/main/resources/org/apache/maven/model/pom-4.1.0.xml    | 3 ++-
 .../java/org/apache/maven/project/PomConstructionTest.java     | 2 +-
 .../src/main/resources/org/apache/maven/model/pom-4.0.0.xml    | 3 ++-
 .../src/main/resources/org/apache/maven/model/pom-4.1.0.xml    | 3 ++-
 5 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/maven-api-impl/src/main/resources/org/apache/maven/model/pom-4.0.0.xml b/maven-api-impl/src/main/resources/org/apache/maven/model/pom-4.0.0.xml
index f971118ce42b..ff7738614f9e 100644
--- a/maven-api-impl/src/main/resources/org/apache/maven/model/pom-4.0.0.xml
+++ b/maven-api-impl/src/main/resources/org/apache/maven/model/pom-4.0.0.xml
@@ -26,7 +26,8 @@ under the License.
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-    <project.build.outputTimestamp>2001-01-01T00:00:00Z</project.build.outputTimestamp>
+    <!-- Fixed date for reproducible build -->
+    <project.build.outputTimestamp>1980-02-01T00:00:00Z</project.build.outputTimestamp>
   </properties>
 
   <build>
diff --git a/maven-api-impl/src/main/resources/org/apache/maven/model/pom-4.1.0.xml b/maven-api-impl/src/main/resources/org/apache/maven/model/pom-4.1.0.xml
index f971118ce42b..ff7738614f9e 100644
--- a/maven-api-impl/src/main/resources/org/apache/maven/model/pom-4.1.0.xml
+++ b/maven-api-impl/src/main/resources/org/apache/maven/model/pom-4.1.0.xml
@@ -26,7 +26,8 @@ under the License.
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-    <project.build.outputTimestamp>2001-01-01T00:00:00Z</project.build.outputTimestamp>
+    <!-- Fixed date for reproducible build -->
+    <project.build.outputTimestamp>1980-02-01T00:00:00Z</project.build.outputTimestamp>
   </properties>
 
   <build>
diff --git a/maven-core/src/test/java/org/apache/maven/project/PomConstructionTest.java b/maven-core/src/test/java/org/apache/maven/project/PomConstructionTest.java
index a72825788114..5cc27d231346 100644
--- a/maven-core/src/test/java/org/apache/maven/project/PomConstructionTest.java
+++ b/maven-core/src/test/java/org/apache/maven/project/PomConstructionTest.java
@@ -1355,7 +1355,7 @@ private void testCompleteModel(PomTestWrapper pom) throws Exception {
         assertEquals("project-property", pom.getValue("properties[1]/itProperty"));
         assertEquals("UTF-8", pom.getValue("properties[1]/project.build.sourceEncoding"));
         assertEquals("UTF-8", pom.getValue("properties[1]/project.reporting.outputEncoding"));
-        assertEquals("2001-01-01T00:00:00Z", pom.getValue("properties[1]/project.build.outputTimestamp"));
+        assertEquals("1980-02-01T00:00:00Z", pom.getValue("properties[1]/project.build.outputTimestamp"));
 
         assertEquals(1, ((List<?>) pom.getValue("dependencyManagement/dependencies")).size());
         assertEquals("org.apache.maven.its", pom.getValue("dependencyManagement/dependencies[1]/groupId"));
diff --git a/maven-model-builder/src/main/resources/org/apache/maven/model/pom-4.0.0.xml b/maven-model-builder/src/main/resources/org/apache/maven/model/pom-4.0.0.xml
index f971118ce42b..ff7738614f9e 100644
--- a/maven-model-builder/src/main/resources/org/apache/maven/model/pom-4.0.0.xml
+++ b/maven-model-builder/src/main/resources/org/apache/maven/model/pom-4.0.0.xml
@@ -26,7 +26,8 @@ under the License.
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-    <project.build.outputTimestamp>2001-01-01T00:00:00Z</project.build.outputTimestamp>
+    <!-- Fixed date for reproducible build -->
+    <project.build.outputTimestamp>1980-02-01T00:00:00Z</project.build.outputTimestamp>
   </properties>
 
   <build>
diff --git a/maven-model-builder/src/main/resources/org/apache/maven/model/pom-4.1.0.xml b/maven-model-builder/src/main/resources/org/apache/maven/model/pom-4.1.0.xml
index f971118ce42b..ff7738614f9e 100644
--- a/maven-model-builder/src/main/resources/org/apache/maven/model/pom-4.1.0.xml
+++ b/maven-model-builder/src/main/resources/org/apache/maven/model/pom-4.1.0.xml
@@ -26,7 +26,8 @@ under the License.
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-    <project.build.outputTimestamp>2001-01-01T00:00:00Z</project.build.outputTimestamp>
+    <!-- Fixed date for reproducible build -->
+    <project.build.outputTimestamp>1980-02-01T00:00:00Z</project.build.outputTimestamp>
   </properties>
 
   <build>