Scala project stopped building due to aspectj.dtd error with aopMerge - scala

Question

My project stopped working from one day to another, without any changes in the project. I'm suspecting one of the dependencies updated, but it's unclear from the error message.
[warn] Merging 'META-INF/aop.xml' with strategy 'aopMerge'
[error] org.xml.sax.SAXParseExceptionpublicId: -//AspectJ//DTD//EN; systemId: http://www.eclipse.org/aspectj/dtd/aspectj.dtd; lineNumber: 1; columnNumber: 2; The markup declarations contained or pointed to by the document type declaration must be well-formed.
The aopMerge strategy in my build.sbt is
val aopMerge: MergeStrategy = new MergeStrategy {
val name = "aopMerge"
import scala.xml._
import scala.xml.dtd._
def apply(tempDir: File, path: String, files: Seq[File]): Either[String, Seq[(File, String)]] = {
val dt = DocType("aspectj", PublicID("-//AspectJ//DTD//EN", "https://www.eclipse.org/aspectj/dtd/aspectj.dtd"), Nil)
val file = MergeStrategy.createMergeTarget(tempDir, path)
val xmls: Seq[Elem] = files.map(XML.loadFile)
val aspectsChildren: Seq[Node] = xmls.flatMap(_ \\ "aspectj" \ "aspects" \ "_")
val weaverChildren: Seq[Node] = xmls.flatMap(_ \\ "aspectj" \ "weaver" \ "_")
val options: String = xmls.map(x => (x \\ "aspectj" \ "weaver" \ "#options").text).mkString(" ").trim
val weaverAttr = if (options.isEmpty) Null else new UnprefixedAttribute("options", options, Null)
val aspects = new Elem(null, "aspects", Null, TopScope, false, aspectsChildren: _*)
val weaver = new Elem(null, "weaver", weaverAttr, TopScope, false, weaverChildren: _*)
val aspectj = new Elem(null, "aspectj", Null, TopScope, false, aspects, weaver)
XML.save(file.toString, aspectj, "UTF-8", xmlDecl = false, dt)
IO.append(file, IO.Newline.getBytes(IO.defaultCharset))
Right(Seq(file -> path))
}
}
I tried changing http://www.eclipse.org/aspectj/dtd/aspectj.dtd into https://www.eclipse.org/aspectj/dtd/aspectj.dtd based on a similar question on StackOverflow. Unfortunately, I'm getting the same error, even with http:// instead of https://. Note that I did run sbt reload after the change.
How can I find out why this is happening? And what can I do to solve this?

Answer 1

The workaround I used was generating a new file with the HTTPS url based on the files passed in files: Seq[File]) parameter. Then changing val xmls: Seq[Elem] = files.map(XML.loadFile) to use this new files.
val xmls: Seq[Elem] = files.map(generateFileWithSecureDtdUrl).map(XML.loadFile)
with the following declared on build.sbt
def generateFileWithSecureDtdUrl(originalFile: File): File = {
val fixedFileName = originalFile.getPath + ".fixed"
val ps: PrintStream = new PrintStream(fixedFileName) {
val originalFileSource: BufferedSource = Source.fromFile(originalFile)
originalFileSource
.getLines()
.map { line =>
if (line.contains("DOCTYPE") && line.contains("http://www.eclipse.org/aspectj/dtd/aspectj.dtd"))
line.replace("http://www.eclipse.org/aspectj/dtd/aspectj.dtd", "https://www.eclipse.org/aspectj/dtd/aspectj.dtd")
else
line
}
.foreach(line => write(line.getBytes("UTF8")))
originalFileSource.close()
}
ps.close()
new File(fixedFileName) }