From 6004b1fadb4b3cc0a1ddfd3860fdb0e181135c8a Mon Sep 17 00:00:00 2001
From: "Mateusz \"Serafin\" Gajewski" <mateusz.gajewski@gmail.com>
Date: Wed, 10 Apr 2024 13:29:45 +0200
Subject: [PATCH] Support reproducible builds

---
 .../maven/ServiceDescriptorGenerator.java     | 20 ++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/src/main/java/io/trino/maven/ServiceDescriptorGenerator.java b/src/main/java/io/trino/maven/ServiceDescriptorGenerator.java
index e4e8617..ba251f5 100644
--- a/src/main/java/io/trino/maven/ServiceDescriptorGenerator.java
+++ b/src/main/java/io/trino/maven/ServiceDescriptorGenerator.java
@@ -28,6 +28,9 @@
 import java.io.IOException;
 import java.net.URL;
 import java.net.URLClassLoader;
+import java.text.DateFormat;
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.jar.JarEntry;
@@ -46,6 +49,7 @@ public class ServiceDescriptorGenerator
         extends AbstractMojo
 {
     private static final String LS = System.lineSeparator();
+    private static final DateFormat OUTPUT_DATE_FORMAT = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssXXX");
 
     @Parameter(defaultValue = "io.trino.spi.Plugin")
     private String pluginClassName;
@@ -59,6 +63,9 @@ public class ServiceDescriptorGenerator
     @Parameter(defaultValue = "${project.build.outputDirectory}")
     private File classesDirectory;
 
+    @Parameter(defaultValue = "${project.build.outputTimestamp}")
+    private String outputTimestamp;
+
     @Parameter(defaultValue = "${project}")
     private MavenProject project;
 
@@ -96,7 +103,18 @@ public void execute()
 
         try (FileOutputStream out = new FileOutputStream(servicesJar);
                 JarOutputStream jar = new JarOutputStream(out)) {
-            jar.putNextEntry(new JarEntry("META-INF/services/" + pluginClassName));
+
+            JarEntry jarEntry = new JarEntry("META-INF/services/" + pluginClassName);
+            if (outputTimestamp != null && !outputTimestamp.isBlank()) {
+                try {
+                    jarEntry.setTime(OUTPUT_DATE_FORMAT.parse(outputTimestamp).getTime());
+                }
+                catch (ParseException e) {
+                    throw new RuntimeException("Could not parse outputTimestamp: " + outputTimestamp, e);
+                }
+            }
+
+            jar.putNextEntry(jarEntry);
             jar.write(servicesFileData);
             jar.closeEntry();
         }