Revert "GoogleContainerTools#3158 - [Jib core] Tar archives with same contents are not reproducible"

This reverts commit 562e2b8

Author: davidtron

jib-core/src/main/java/com/google/cloud/tools/jib/tar/TarStreamBuilder.java

@@ -21,15 +21,13 @@
 import java.io.IOException;
 import java.io.OutputStream;
 import java.nio.charset.StandardCharsets;
-import java.time.Instant;
 import java.util.LinkedHashMap;
 import java.util.Map;
 import org.apache.commons.compress.archivers.tar.TarArchiveEntry;
 import org.apache.commons.compress.archivers.tar.TarArchiveOutputStream;
 
 /** Builds a tarball archive. */
 public class TarStreamBuilder {
-  public static final Instant DEFAULT_MODIFICATION_TIME = Instant.ofEpochSecond(1);
 
   /**
    * Maps from {@link TarArchiveEntry} to a {@link Blob}. The order of the entries is the order they
@@ -91,7 +89,6 @@ public void addByteEntry(byte[] contents, String name) {
   public void addBlobEntry(Blob blob, long size, String name) {
     TarArchiveEntry entry = new TarArchiveEntry(name);
     entry.setSize(size);
-    entry.setModTime(DEFAULT_MODIFICATION_TIME.getEpochSecond());
     archiveMap.put(entry, blob);
   }
 }

jib-core/src/test/java/com/google/cloud/tools/jib/tar/TarStreamBuilderTest.java

@@ -29,7 +29,6 @@
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
-import java.util.Arrays;
 import java.util.zip.GZIPInputStream;
 import java.util.zip.GZIPOutputStream;
 import org.apache.commons.compress.archivers.tar.TarArchiveEntry;
@@ -132,26 +131,6 @@ public void testToBlob_multiByte() throws IOException {
     Assert.assertNull(tarArchiveInputStream.getNextTarEntry());
   }
 
-  @Test
-  public void testTarStreamAreReproducible() throws IOException, InterruptedException {
-    testTarStreamBuilder.addBlobEntry(
-        Blobs.from("jib"), "jib".getBytes(StandardCharsets.UTF_8).length, "jib");
-    ByteArrayOutputStream firstTarByteOutputStream = new ByteArrayOutputStream();
-    testTarStreamBuilder.writeAsTarArchiveTo(firstTarByteOutputStream);
-
-    Thread.sleep(2000);
-
-    TarStreamBuilder anotherTestTarStreamBuilder = new TarStreamBuilder();
-    anotherTestTarStreamBuilder.addBlobEntry(
-        Blobs.from("jib"), "jib".getBytes(StandardCharsets.UTF_8).length, "jib");
-    ByteArrayOutputStream secondTarByteOutputStream = new ByteArrayOutputStream();
-    anotherTestTarStreamBuilder.writeAsTarArchiveTo(secondTarByteOutputStream);
-
-    Assert.assertTrue(
-        Arrays.equals(
-            firstTarByteOutputStream.toByteArray(), secondTarByteOutputStream.toByteArray()));
-  }
-
   /** Creates a TarStreamBuilder using TarArchiveEntries. */
   private void setUpWithTarEntries() {
     // Prepares a test TarStreamBuilder.