File 0002-Make-metadata-UUIDs-reproducible-if-SOURCE_DATE_EPOC.patch of Package xmvn

From 2419d17ea3290e4d25f5629dbeac4df460ec8376 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fridrich=20=C5=A0trba?= <fridrich.strba@bluewin.ch>
Date: Wed, 20 Sep 2023 18:46:28 +0200
Subject: [PATCH 2/3] Make metadata UUIDs reproducible if SOURCE_DATE_EPOCH is
 set

---
 .../xmvn/tools/install/JavaPackage.java            | 14 ++++++++++++--
 .../install/impl/DefaultArtifactInstaller.java     |  7 ++++++-
 2 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/xmvn-tools/xmvn-install/src/main/java/org/fedoraproject/xmvn/tools/install/JavaPackage.java b/xmvn-tools/xmvn-install/src/main/java/org/fedoraproject/xmvn/tools/install/JavaPackage.java
index 9835c5b8..0542c838 100644
--- a/xmvn-tools/xmvn-install/src/main/java/org/fedoraproject/xmvn/tools/install/JavaPackage.java
+++ b/xmvn-tools/xmvn-install/src/main/java/org/fedoraproject/xmvn/tools/install/JavaPackage.java
@@ -58,7 +58,12 @@ public class JavaPackage
         super( id );
         this.basePackageName = basePackageName;
         this.metadataDir = metadataDir;
-        metadata.setUuid( UUID.randomUUID().toString() );
+        UUID guid = UUID.randomUUID();
+        if ( System.getenv( "SOURCE_DATE_EPOCH" ) != null )
+        {
+            guid = UUID.nameUUIDFromBytes( ( System.getenv( "SOURCE_DATE_EPOCH" ) + id + basePackageName + metadataDir.toString() ).getBytes() );
+        }
+        metadata.setUuid( guid.toString() );
     }
 
     /**
@@ -71,11 +76,16 @@ public class JavaPackage
     private PackageMetadata getSplitMetadata( String namespace )
     {
         PackageMetadata splitMetadata = new PackageMetadata();
-        splitMetadata.setUuid( UUID.randomUUID().toString() );
         splitMetadata.setProperties( metadata.getProperties() );
         List<ArtifactMetadata> allArtifacts = metadata.getArtifacts();
         List<ArtifactMetadata> splitArtifacts =
             allArtifacts.stream().filter( a -> namespace.equals( a.getNamespace() ) ).collect( Collectors.toList() );
+        UUID guid = UUID.randomUUID();
+        if ( System.getenv( "SOURCE_DATE_EPOCH" ) != null )
+        {
+            guid = UUID.nameUUIDFromBytes( ( System.getenv( "SOURCE_DATE_EPOCH" ) + splitArtifacts.toString() ).getBytes() );
+        }
+        splitMetadata.setUuid( guid.toString() );
         splitMetadata.setArtifacts( splitArtifacts );
         splitMetadata.setSkippedArtifacts( metadata.getSkippedArtifacts() );
         return splitMetadata;
diff --git a/xmvn-tools/xmvn-install/src/main/java/org/fedoraproject/xmvn/tools/install/impl/DefaultArtifactInstaller.java b/xmvn-tools/xmvn-install/src/main/java/org/fedoraproject/xmvn/tools/install/impl/DefaultArtifactInstaller.java
index 0c83e664..c3fa1bdf 100644
--- a/xmvn-tools/xmvn-install/src/main/java/org/fedoraproject/xmvn/tools/install/impl/DefaultArtifactInstaller.java
+++ b/xmvn-tools/xmvn-install/src/main/java/org/fedoraproject/xmvn/tools/install/impl/DefaultArtifactInstaller.java
@@ -185,7 +185,12 @@ class DefaultArtifactInstaller
         am.setNamespace( repo.getNamespace() );
 
         // UUID
-        am.setUuid( UUID.randomUUID().toString() );
+        UUID guid = UUID.randomUUID();
+        if ( System.getenv( "SOURCE_DATE_EPOCH" ) != null )
+        {
+            guid = UUID.nameUUIDFromBytes( ( System.getenv( "SOURCE_DATE_EPOCH" ) + repo.getNamespace() + artifact.toString() ).getBytes() );
+        }
+        am.setUuid( guid.toString() );
 
         // Compat version
         for ( String version : rule.getVersions() )
-- 
2.45.2