[Tutor] Configuaration files and paths?

[Allen Fowler]

> > 
> > FWIW:
> > 
> > When using relative paths I got extra ../../ terms, so I changed  
> join_relative() to:
> > 
> > def join_relative(base, path):
> >     return os.path.normpath(os.path.join(script_dir(base), path))
> > 
> > 
> > Seems to work...
> 
> 
> Yeah, good catch ... looks great, and thanks for sharing your mod.
> 


Glad I could return the favor.  :)

Since then, I took it a bit further for use in my code...  I am not finished with it yet, but am curios what you think.  (I am not sure named things right or structured it logically....)


###################

import os
class HomePath(object):
        """For finding paths based on a home/install directory.
        
        """
         
        def __init__(self, home_dir = None, home_file = None):
            """Must be called with either a path to a directory or, as a shortcut, a file in that directory.
            
            """
            
            if home_file != None:
                # Set home based on a path to a file in its directory
                self.home = os.path.normpath(self.fix_path(home_file))
            
            elif home_dir != None:
                # Set home based on its path
                self.home = os.path.normpath(self.get_dir(home_dir))
                
            else:
                raise Exception("Must call with either a path to a directory or, as a shortcut, a file in that directory.")
                
        def abs(self, rel_from_home):
            """Return an absolute path when passed a path relative to home.
            
            """
            
            return self.join_relative(self.home, rel_from_home)
            
        def fix_path(self, base):
            return os.path.realpath(os.path.abspath(base))

        def get_dir(self, base):
            return os.path.dirname(self.fix_path(base))

        def join_relative(self, base, path):
            return os.path.normpath(self.fix_path(os.path.join(self.home, path)))
#############################