[cdt-dev] EnvironmentVariable and null values

[Jan Baeyens <jan@xxxxxxxxxx>]

Hi

I was looking for a bug and found that I had a null value in an 
environment var and that caused the problem.
Because the environment variable (I'll call it MY_NULL=null) was 
referenced by another environment variable (I'll call it 
NULL_REF=${MY_NULL}) the following call failed

     envManager.getVariable("NULL_REF", configurationDescription, true);

but this was ok

     envManager.getVariable("NULL_REF", configurationDescription, false);

I can fix this but I don't know what the preferred solution would look like.

As the documentation is limited I wonder whether to fix it as 
"EnvironmentVariable does not support null values" or 
"EnvironmentVariable supports null values".

Please provide input on what the preferred solution would be

Best regards

Jantje

PS: Note that there is also a bug in case of removed variables (which 
probably never happens but still).

        private void loadValue(IEnvironmentVariable var){
            String delimiter = var.getDelimiter();
            String value = var.getOperation() != 
IEnvironmentVariable.ENVVAR_REMOVE ?
                    var.getValue() : null;

            if(isTextList(value,delimiter)){

this because isTextList will create a exception when value is null.