Cameron Goodale created CLIMATE-441:
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             Summary: easy-ocw needs to check if a previous 'ocw' virtualenv 
exists
                 Key: CLIMATE-441
                 URL: https://issues.apache.org/jira/browse/CLIMATE-441
             Project: Apache Open Climate Workbench
          Issue Type: Improvement
          Components: build process
    Affects Versions: 0.3-incubating
         Environment: OSX
            Reporter: Cameron Goodale
            Assignee: Cameron Goodale
             Fix For: 0.4


I was testing out the easy-ocw code on my mac and I already had a virtualenv 
called 'ocw' from a previous test.  When i ran the ./install-osx.sh an OSError 
was thrown and the installer proceeded to install all of the dependencies into 
my system python.

In the future the code will check for an existing 'ocw' virtualenv and if 
found, it will ask the user if they want to replace that virtualenv with a new 
one.  If the user says 'Yes' then we will remove the existing ocw and make a 
new one.  If they say No then we need to exit gracefully without installing 
anything.



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