Fix NPE when reading posixfileattributes on windows (#419)

This only appeared in 17.0.2 (or lower 17er) on windows, so run ci against this version.

Author: Postremus

.github/workflows/maven.yml

@@ -23,6 +23,14 @@ jobs:
   build:
     name: Build it
     uses: codehaus-plexus/.github/.github/workflows/maven.yml@master
+    with:
+      # Execute on a jdk between 17 and 17.0.2 to explicitly test workaround for jar tool --date support not present in that version
+      # See org.codehaus.plexus.archiver.jar.JarToolModularJarArchiver.isJarDateOptionSupported
+      # https://github.com/codehaus-plexus/plexus-archiver/issues/164
+      matrix-include: >
+        [ 
+          {"jdk": "17.0.2", "os": "windows-latest", distribution: "zulu" }
+        ]
 
 #   deploy:
 #     name: Deploy

src/main/java/org/codehaus/plexus/archiver/jar/JarToolModularJarArchiver.java

@@ -153,9 +153,14 @@ protected void postCreateArchive() throws ArchiverException {
     private void fixLastModifiedTimeZipEntries() throws IOException {
         long timeMillis = getLastModifiedTime().toMillis();
         Path destFile = getDestFile().toPath();
-        PosixFileAttributes posixFileAttributes = Files.getFileAttributeView(
-                        destFile, PosixFileAttributeView.class, LinkOption.NOFOLLOW_LINKS)
-                .readAttributes();
+        PosixFileAttributeView view =
+                Files.getFileAttributeView(destFile, PosixFileAttributeView.class, LinkOption.NOFOLLOW_LINKS);
+
+        PosixFileAttributes posixFileAttributes = null;
+        if (view != null) {
+            posixFileAttributes = view.readAttributes();
+        }
+
         FileAttribute<?>[] attributes;
         if (posixFileAttributes != null) {
             attributes = new FileAttribute<?>[1];
@@ -272,7 +277,7 @@ private static FileTime revertToLocalTime(FileTime time) {
     }
 
     /**
-     * Check support for {@code --date} option introduced since Java 17.0.3 (JDK-8279925).
+     * Check support for {@code --date} option introduced since Java 17.0.3 with <a href="https://bugs.openjdk.org/browse/JDK-8277755">JDK-8277755</a>.
      *
      * @return true if the JAR tool supports the {@code --date} option
      */