Add file path of the missing dependency in exception (#148)

Signed-off-by: Olivier Lamy <[email protected]>

Author: olamy

src/main/java/org/eclipse/jetty/toolchain/modifysources/ModFilesFiltering.java

@@ -83,7 +83,7 @@ public void copyFile(File from, final File to, boolean filtering, List<FilterWra
                                 return dependencyToJarName(dependency.get());
                             }
                             dependency = findDependency(groupId, artifactId, mavenProject.getDependencyManagement().getDependencies());
-                            return dependencyToJarName(dependency.orElseThrow(() -> new NullPointerException("cannot find dependency " + groupId + ":" + artifactId)));
+                            return dependencyToJarName(dependency.orElseThrow(() -> new NullPointerException("cannot find dependency " + groupId + ":" + artifactId + " for file " + from)));
                         }
                         return mavenProject.getProperties().getProperty(s);
                     };