From 7cd7ea8d6dbf6ad98b9b1fa201116840c791c630 Mon Sep 17 00:00:00 2001
From: Daniel Wegener <daniel@wegener.me>
Date: Fri, 1 Jul 2016 13:57:09 +0200
Subject: [PATCH] Add fixedEntryModificationTime attribute to
 AbstractZipArchiver to override zipEntry times globally. closes #48

---
 .../archiver/zip/AbstractZipArchiver.java     | 26 ++++++++++++++++++-
 .../plexus/archiver/zip/ZipArchiverTest.java  | 18 +++++++++++++
 2 files changed, 43 insertions(+), 1 deletion(-)

diff --git a/src/main/java/org/codehaus/plexus/archiver/zip/AbstractZipArchiver.java b/src/main/java/org/codehaus/plexus/archiver/zip/AbstractZipArchiver.java
index c69f69c2c..16cdbf43d 100755
--- a/src/main/java/org/codehaus/plexus/archiver/zip/AbstractZipArchiver.java
+++ b/src/main/java/org/codehaus/plexus/archiver/zip/AbstractZipArchiver.java
@@ -56,6 +56,11 @@ public abstract class AbstractZipArchiver
     extends AbstractArchiver
 {
 
+    /**
+     * The minimum value for MS-DOS time format: 01 Jan 1980 00:00:00 UTC
+     **/
+    private static final Long MIN_MS_DOS_TIME = 315532800000L;
+
     private String comment;
 
     /**
@@ -132,6 +137,12 @@ public abstract class AbstractZipArchiver
 
     protected ZipArchiveOutputStream zipArchiveOutputStream;
 
+    /**
+     * Will always use the given modification time for zipEntries if set.
+     * The given modification time will be rounded up to {@link AbstractZipArchiver#MIN_MS_DOS_TIME}.
+     */
+    private Long fixedEntryModificationTime;
+
     private static int getJavaVersion()
     {
         String javaSpecVersion = System.getProperty( "java.specification.version" );
@@ -212,6 +223,14 @@ public boolean isFilesonly()
         return doFilesonly;
     }
 
+    public Long getFixedEntryModificationTime() {
+        return fixedEntryModificationTime;
+    }
+
+    public void setFixedEntryModificationTime(Long fixedEntryModificationTime) {
+        this.fixedEntryModificationTime = fixedEntryModificationTime;
+    }
+
     @Override
     protected void execute()
         throws ArchiverException, IOException
@@ -578,7 +597,12 @@ public InputStream get()
 
     private void setTime( java.util.zip.ZipEntry zipEntry, long lastModified )
     {
-        zipEntry.setTime( lastModified + ( isJava7OrLower ? 1999 : 0 ) );
+
+        if (fixedEntryModificationTime != null) {
+            zipEntry.setTime(Math.max(MIN_MS_DOS_TIME, fixedEntryModificationTime));
+        } else {
+            zipEntry.setTime( lastModified + ( isJava7OrLower ? 1999 : 0 ) );
+        }
 
         /*   Consider adding extended file stamp support.....
 
diff --git a/src/test/java/org/codehaus/plexus/archiver/zip/ZipArchiverTest.java b/src/test/java/org/codehaus/plexus/archiver/zip/ZipArchiverTest.java
index 615e59226..64fbc2046 100644
--- a/src/test/java/org/codehaus/plexus/archiver/zip/ZipArchiverTest.java
+++ b/src/test/java/org/codehaus/plexus/archiver/zip/ZipArchiverTest.java
@@ -797,4 +797,22 @@ public void testForcedFileModes()
         }
     }
 
+    public void testFixedEntryModificationTime()
+            throws IOException
+    {
+        final long almostMinDosTime = 315532802000L;
+        final File zipFile = getTestFile( "target/output/zip-with-fixed-entry-modification-times.zip" );
+        final ZipArchiver archiver = getZipArchiver( zipFile );
+        archiver.setFixedEntryModificationTime(almostMinDosTime);
+        archiver.addDirectory(new File( "src/test/resources/zip-timestamp"));
+        archiver.createArchive();
+
+        assertTrue( zipFile.exists() );
+        final ZipFile zf = new ZipFile( zipFile );
+        assertEquals(new Date(almostMinDosTime), zf.getEntry( "file-with-even-time.txt" ).getLastModifiedDate());
+        assertEquals(new Date(almostMinDosTime), zf.getEntry( "file-with-odd-time.txt" ).getLastModifiedDate());
+        assertEquals(new Date(almostMinDosTime), zf.getEntry( "foo/" ).getLastModifiedDate());
+    }
+
 }
+