Schema update process only runs on Windows

[magnusbaeck]

Description

Running the schema update process with mvn clean install -P process-schemas on a Unix-like platform results in the following exception:

Caused by: java.lang.IllegalArgumentException: /home/magnusbk/src/eiffel-remrem-semantics/src\main\resources\schemas\input does not exist
    at org.apache.commons.io.FileUtils.verifiedListFiles (FileUtils.java:1741)
    at org.apache.commons.io.FileUtils.cleanDirectory (FileUtils.java:1716)
    at com.ericsson.eiffel.remrem.semantics.schemas.LocalRepo.readSchemas (LocalRepo.java:46)
    at com.ericsson.eiffel.remrem.semantics.clone.PrepareLocalEiffelSchemas.main (PrepareLocalEiffelSchemas.java:194)
    at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:498)
    at org.codehaus.mojo.exec.ExecJavaMojo$1.run (ExecJavaMojo.java:294)
    at java.lang.Thread.run (Thread.java:748)

This is unsurprising given the backslash-separated paths in EiffelConstants.

Motivation

The schema update process should obviously be possible to run on platforms other than Windows.

Exemplification

I'd like to be able to update the schemas from a Linux host.

Benefits

Obvious.

Possible Drawbacks

None.

[magnusbaeck]

I have a half-backed patch for this. Should be able to send a PR tomorrow.

[magnusbaeck]

Additionally, the code only works as expected when the schema files happen to be returned from File.listFiles() in version order, i.e. with the most recent schema file last.