SASSCompiler fails due to incomplete quotes in cwd

[SverkerSbrg]

Hello! I've been having some trouble with pipeline and after some debugging I found the cause in the SASSCompiler. See code below.

class SASSCompiler(SubProcessCompiler):
    output_extension = 'css'

    def match_file(self, filename):
        return filename.endswith(('.scss', '.sass'))

    def compile_file(self, infile, outfile, outdated=False, force=False):
        command = "%s %s %s %s" % (
            settings.PIPELINE_SASS_BINARY,
            settings.PIPELINE_SASS_ARGUMENTS,
            infile,
            outfile
        )
        print(infile)
        print(dirname(infile))
        return self.execute_command(command, cwd=dirname(infile))

#--------------output-------------------
'C:\...\staticfiles\angular\test.scss'
'C:\...\staticfiles\angular

My print statement revealse that the dirname function accidentally (?) leaves the first of the quotes in the string which causes the command to fail.

adding dirname(infiel).replace("'", "") solves the problem.

Any ideas what is happening and what the root cause is?

I'm developing on windows 8.1 using python 2.7.9

The following sample reproduces the bug on my system

from os.path import dirname

test = "'C:/Users/test.scss'"

print(test)
print(dirname(test))

#C:\Users\Sverker\Desktop>python bug.py
#    'C:/Users/test.scss'
#    'C:/Users    

This should effect all other compilers using the cwd command as well (sass, less & stylus)

[cyberdelia]

Fix should be fixed by #519