gradle: Set lastModified time of jars files to now

When the Bnd gradle plugin writes a jar file, we need to set the time
of the file to the time it is written instead of the default which is
the time of the most recent resource in the jar file.

Fixes #3118

Signed-off-by: BJ Hargrave <bj@bjhargrave.com>

biz.aQute.bnd.gradle/src/aQute/bnd/gradle/BndPlugin.groovy

@@ -284,6 +284,10 @@ public class BndPlugin implements Plugin<Project> {
           File[] built
           try {
             built = bndProject.build()
+            long now = System.currentTimeMillis()
+            built?.each {
+              it.setLastModified(now)
+            }
           } catch (Exception e) {
             throw new GradleException("Project ${bndProject.getName()} failed to build", e)
           }

biz.aQute.bnd.gradle/src/aQute/bnd/gradle/BundleTaskConvention.groovy

@@ -295,6 +295,8 @@ class BundleTaskConvention {
 
         // Write out the bundle
         builtJar.write(archivePath)
+        long now = System.currentTimeMillis()
+        archivePath.setLastModified(now)
 
         logReport(builder, logger)
         if (!builder.isOk()) {

biz.aQute.bndlib/src/aQute/bnd/build/Project.java

@@ -1891,8 +1891,8 @@ public File[] buildLocal(boolean underTest) throws Exception {
 					return null;
 				}
 				builtFiles.add(file);
-				if (lastModified < file.lastModified()) {
-					lastModified = file.lastModified();
+				if (lastModified < jar.lastModified()) {
+					lastModified = jar.lastModified();
 				}
 			}