File lucene-timestamps.patch of Package lucene

--- lucene-8.11.2/analysis/common/src/tools/java/org/apache/lucene/analysis/standard/GenerateJflexTLDMacros.java	2022-06-13 18:25:09.000000000 +0200
+++ lucene-8.11.2/analysis/common/src/tools/java/org/apache/lucene/analysis/standard/GenerateJflexTLDMacros.java	2023-09-18 13:40:32.178161872 +0200
@@ -207,7 +207,7 @@
         writer.write(NL);
       }
       writer.write("// generated on ");
-      writer.write(dateFormat.format(new Date()));
+      writer.write(dateFormat.format(System.getenv("SOURCE_DATE_EPOCH") != null ? new Date(1000 * Long.parseLong(System.getenv("SOURCE_DATE_EPOCH"))) : new Date()));
       writer.write(NL);
       writer.write("// by ");
       writer.write(this.getClass().getName());
--- lucene-8.11.2/benchmark/src/java/org/apache/lucene/benchmark/byTask/feeds/DocMaker.java	2022-06-13 18:25:10.000000000 +0200
+++ lucene-8.11.2/benchmark/src/java/org/apache/lucene/benchmark/byTask/feeds/DocMaker.java	2023-09-18 13:38:53.074193935 +0200
@@ -272,7 +272,7 @@
 
     if (date == null) {
       // just set to right now
-      date = new Date();
+      date = System.getenv("SOURCE_DATE_EPOCH") != null ? new Date(1000 * Long.parseLong(System.getenv("SOURCE_DATE_EPOCH"))) : new Date();
     }
 
     Field dateField = ds.getNumericField(DATE_MSEC_FIELD, Long.class);
--- lucene-8.11.2/benchmark/src/java/org/apache/lucene/benchmark/byTask/feeds/LongToEnglishContentSource.java	2022-06-13 18:25:10.000000000 +0200
+++ lucene-8.11.2/benchmark/src/java/org/apache/lucene/benchmark/byTask/feeds/LongToEnglishContentSource.java	2023-09-18 13:39:15.331003116 +0200
@@ -54,7 +54,7 @@
     docData.setBody(rnbf.format(curCounter));
     docData.setName("doc_" + String.valueOf(curCounter));
     docData.setTitle("title_" + String.valueOf(curCounter));
-    docData.setDate(new Date());
+    docData.setDate(System.getenv("SOURCE_DATE_EPOCH") != null ? new Date(1000 * Long.parseLong(System.getenv("SOURCE_DATE_EPOCH"))) : new Date());
     return docData;
   }
 
--- lucene-8.11.2/core/src/java/org/apache/lucene/index/IndexWriter.java	2022-06-13 18:25:10.000000000 +0200
+++ lucene-8.11.2/core/src/java/org/apache/lucene/index/IndexWriter.java	2023-09-18 13:41:45.318630172 +0200
@@ -4593,7 +4593,7 @@
     diagnostics.put("java.runtime.version", System.getProperty("java.runtime.version", "undefined"));
     // Hotspot version, e.g. 2.8 for J9:
     diagnostics.put("java.vm.version", System.getProperty("java.vm.version", "undefined"));
-    diagnostics.put("timestamp", Long.toString(new Date().getTime()));
+    diagnostics.put("timestamp", Long.toString((System.getenv("SOURCE_DATE_EPOCH") != null ? new Date(1000 * Long.parseLong(System.getenv("SOURCE_DATE_EPOCH"))) : new Date()).getTime()));
     if (details != null) {
       diagnostics.putAll(details);
     }
--- lucene-8.11.2/core/src/java/org/apache/lucene/util/StringHelper.java	2022-06-13 18:25:10.000000000 +0200
+++ lucene-8.11.2/core/src/java/org/apache/lucene/util/StringHelper.java	2023-09-18 17:34:58.751336732 +0200
@@ -214,6 +214,10 @@
     
     String prop = System.getProperty("tests.seed");
 
+    if (prop == null) {
+      prop = System.getenv("SOURCE_DATE_EPOCH");
+    }
+
     // State for xorshift128:
     long x0;
     long x1;