Make it possible to use a relative path to GWT installation

Currently it is only possible to create an absolute path to the GWT installation.
This is causing problems because some of our developers have macs, and others have windows pc's.

When selecting the GWT installation in the plugin, it will modify the .classpath files with absolute paths like c:\.... Offcourse the mac pc's don't have a clue what c:\ is.

Without the plugin we solved this by creating an Eclipse project structure as followed

Project
|-imp
--|-src
--|-war
|-vendorlibraries
--|-gwt-codeserver
--|-gwt-dev.jar
--|-gwt-user.jar
--|-validation-api-1.0.0.GA-sources.jar
--|-validation-api-1.0.0.GA

When you then add those gwt jars to your classpath, they are relative in your .classpath file.

I actuallly managed to fix this problem, by editing the .classpath file by hand.
I replaced the lines as followed created by the plugin (multiple lines exist, this is just 1 example) :

with :

Note the / before vendorlibraries. This is the way Eclipse needs this to be (all your relative jars start with a /)

Now all is working, but Eclipse now gives the following error message :
- The GWT SDK JAR gwt-servlet.jar is missing in the WEB-INF/lib directory

This is because the plugin can't find the gwt-servlet.jar. I think because it is looking in c::\vendorlibraries instead of in the relative vendorlibraries directory.

Actually, this is not a problem for us because we don't use gwt-servlet.jar because we are talking with a C#.NET backend and are not using any servlets.

Commencez par la sélection de l’installation de GWT dans le plugin Eclipse et examinez comment il écrit les entrées .classpath et localise gwt-servlet.jar. Reproduisez la configuration avec le chemin relatif /vendorlibraries/gwt-user.jar, puis vérifiez que les projets peuvent utiliser les chemins relatifs sous Windows et macOS sans avertissements incorrects concernant des JAR manquants.

Rédigé par le modèle d'indexation à partir du texte de l'issue.