Detecting external versions for VisIt

[Olivier Cessenat]

Hello,

I would like to add the spack external find visit feature.

Typically I would set

    executables = ['^xml2cmake$']

    @classmethod

    def determine_version(cls, exe):

        output = Executable(exe)('--version', output=str, error=str)

        match = re.search(r'xml2cmake\s*([\d\.]+)', output)

        return match.group(1) if match else None

but this detects only the latest version per base of visit.

For instance, let visit be installed on /opt, with the following versions :

$ ls /opt/visit/

2.12.3 2.8.2  3.0.2  3.1.1  3.1.3  3.1.4  3.2.0  bin  current data

The last version is 3.2.0, but there are also 3.1.4, ..., 2.8.2

So, is there a way to return a list of versions per exe ?

Thanks,

Olivier Cessenat