[MSHADE-420] fix time when read from extra field

Author: hboutemy

pom.xml

@@ -255,6 +255,11 @@
       <version>3.3.0</version>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.apache.commons</groupId>
+      <artifactId>commons-compress</artifactId>
+      <version>1.23.0</version>
+    </dependency>
   </dependencies>
 
   <build>

src/main/java/org/apache/maven/plugins/shade/DefaultShader.java

@@ -43,6 +43,7 @@
 import java.util.List;
 import java.util.Objects;
 import java.util.Set;
+import java.util.TimeZone;
 import java.util.concurrent.Callable;
 import java.util.jar.JarEntry;
 import java.util.jar.JarFile;
@@ -55,6 +56,9 @@
 
 import org.apache.commons.collections4.MultiValuedMap;
 import org.apache.commons.collections4.multimap.HashSetValuedHashMap;
+import org.apache.commons.compress.archivers.zip.ExtraFieldUtils;
+import org.apache.commons.compress.archivers.zip.X5455_ExtendedTimestamp;
+import org.apache.commons.compress.archivers.zip.ZipExtraField;
 import org.apache.maven.plugin.MojoExecutionException;
 import org.apache.maven.plugins.shade.filter.Filter;
 import org.apache.maven.plugins.shade.relocation.Relocator;
@@ -89,6 +93,25 @@ public DefaultShader(final Logger logger) {
         this.logger = Objects.requireNonNull(logger);
     }
 
+    // workaround for MSHADE-420
+    private long getTime(ZipEntry entry) {
+        if (entry.getExtra() != null) {
+            try {
+                ZipExtraField[] fields =
+                        ExtraFieldUtils.parse(entry.getExtra(), true, ExtraFieldUtils.UnparseableExtraField.SKIP);
+                for (ZipExtraField field : fields) {
+                    if (X5455_ExtendedTimestamp.HEADER_ID.equals(field.getHeaderId())) {
+                        // extended timestamp extra field: need to translate UTC to local time for Reproducible Builds
+                        return entry.getTime() - TimeZone.getDefault().getRawOffset();
+                    }
+                }
+            } catch (ZipException ze) {
+                // ignore
+            }
+        }
+        return entry.getTime();
+    }
+
     public void shade(ShadeRequest shadeRequest) throws IOException, MojoExecutionException {
         Set<String> resources = new HashSet<>();
 
@@ -332,7 +355,7 @@ public InputStream call() throws Exception {
                                 }
                             },
                             name,
-                            entry.getTime(),
+                            getTime(entry),
                             entry.getMethod());
                 } catch (Exception e) {
                     throw new IOException(String.format("Problem shading JAR %s entry %s: %s", jar, name, e), e);
@@ -423,7 +446,7 @@ private void goThroughAllJarEntriesForManifestTransformer(
                             resources.add(resource);
                             try (InputStream inputStream = jarFile.getInputStream(entry)) {
                                 manifestTransformer.processResource(
-                                        resource, inputStream, shadeRequest.getRelocators(), entry.getTime());
+                                        resource, inputStream, shadeRequest.getRelocators(), getTime(entry));
                             }
                             break;
                         }