Scan not performed on saved ClassGraph object

Hi. I don’t understand why the scanning is not performed if I store the ClassGraph instance in a variable before calling the scan() method.

For example:

class MyMavenRunner{
    companion object {
        @JvmStatic
        fun main(args: Array<String>) {
            val parsedArgs = parseCommandArgs(args)
            val classGraph =
                    ClassGraph()
                            .verbose()
                            .enableClassInfo()
                            .enableMethodInfo()
                            .disableJarScanning()
                            .disableNestedJarScanning()
                            .whitelistPackages(BASE_PACKAGE)
                            .overrideClasspath(parsedArgs.projectBuildPath.toString())

            val data= generateData(classGraph)
            print(data)
        }
    }
}

(where generateData(ClassGraph), declared in another class as static, calls inside classGraph.scan().use {...}) doesn’t work (I get 2020-02-04T11:35:35.667+0100 ClassGraph Only returning classpath elements (not performing a scan) from the verbose(), which causes then an NPE when I call getClassesImplementing(MyClass.class.canonicalName)), but if I do

ClassGraph()
                            .verbose()
                            .enableClassInfo()
                            .enableMethodInfo()
                            .disableJarScanning()
                            .disableNestedJarScanning()
                            .whitelistPackages(BASE_PACKAGE)
                            .overrideClasspath(parsedArgs.projectBuildPath.toString())
                            .scan()
                            .use { scanResult -> ... }

inside the generateData directly it works fine.

The main(args) is called from the Maven Exec Plugin.

[cdprete]

but please open a new bug for the other issue you alluded to, if it’s still present.

It’s this one: https://github.com/classgraph/classgraph/issues/399

[lukehutch]

Makes sense, I thought you were using it with it in use { ... }.

Please let me know if the fix worked for you (it should do).