// If we get an exception at the top level, then something's

// gone very wrong. Don't try to be too fancy, but try to

// log a simple message.

val msg = "[ERROR] CodeQL Kotlin extractor: Top-level exception."

// First, if we can find our log directory, then let's try

// making a log file there:

val extractorLogDir = System.getenv("CODEQL_EXTRACTOR_JAVA_LOG_DIR")

if (extractorLogDir != null || extractorLogDir != "") {

// We use a slightly different filename pattern compared

// to normal logs. Just the existence of a `-top` log is

// a sign that something's gone very wrong.

val logFile = File.createTempFile("kotlin-extractor-top.", ".log", File(extractorLogDir))

logFile.writeText(msg)

// Now we've got that out, let's see if we can append a stack trace too

logFile.appendText(e.stackTraceToString())

} else {

// We don't have much choice here except to print to

// stderr and hope for the best.

System.err.println(msg)

e.printStackTrace(System.err)

}