Raise error if download directory does not exist
Raise error if download directory does not exist

ChristopherHogan/pip,ncoghlan/pip,erikrose/pip,erikrose/pip,atdaemon/pip,qbdsoft/pip,Gabriel439/pip,benesch/pip,mindw/pip,graingert/pip,alex/pip,sbidoul/pip,Ivoz/pip,habnabit/pip,nthall/pip,yati-sagade/pip,mindw/pip,fiber-space/pip,techtonik/pip,zvezdan/pip,supriyantomaftuh/pip,rbtcollins/pip,prasaianooz/pip,squidsoup/pip,h4ck3rm1k3/pip,zorosteven/pip,zenlambda/pip,natefoo/pip,jythontools/pip,nthall/pip,rouge8/pip,ncoghlan/pip,squidsoup/pip,zorosteven/pip,rouge8/pip,luzfcb/pip,harrisonfeng/pip,domenkozar/pip,pypa/pip,natefoo/pip,James-Firth/pip,yati-sagade/pip,pjdelport/pip,rbtcollins/pip,esc/pip,pfmoore/pip,jmagnusson/pip,prasaianooz/pip,pjdelport/pip,qwcode/pip,Carreau/pip,jasonkying/pip,minrk/pip,blarghmatey/pip,atdaemon/pip,jamezpolley/pip,sigmavirus24/pip,pradyunsg/pip,ChristopherHogan/pip,pjdelport/pip,supriyantomaftuh/pip,tdsmith/pip,jasonkying/pip,KarelJakubec/pip,KarelJakubec/pip,James-Firth/pip,pfmoore/pip,natefoo/pip,esc/pip,jasonkying/pip,qbdsoft/pip,wkeyword/pip,mujiansu/pip,caosmo/pip,h4ck3rm1k3/pip,msabramo/pip,zenlambda/pip,alquerci/pip,mujiansu/pip,caosmo/pip,harrisonfeng/pip,nthall/pip,radiosilence/pip,jythontools/pip,alex/pip,mattrobenolt/pip,zvezdan/pip,erikrose/pip,ncoghlan/pip,davidovich/pip,chaoallsome/pip,chaoallsome/pip,haridsv/pip,benesch/pip,fiber-space/pip,fiber-space/pip,caosmo/pip,pypa/pip,sbidoul/pip,rbtcollins/pip,graingert/pip,alquerci/pip,techtonik/pip,yati-sagade/pip,habnabit/pip,ianw/pip,dstufft/pip,pradyunsg/pip,mindw/pip,squidsoup/pip,xavfernandez/pip,wkeyword/pip,willingc/pip,jamezpolley/pip,luzfcb/pip,alex/pip,graingert/pip,atdaemon/pip,prasaianooz/pip,Ivoz/pip,blarghmatey/pip,patricklaw/pip,Carreau/pip,zenlambda/pip,davidovich/pip,harrisonfeng/pip,James-Firth/pip,willingc/pip,ianw/pip,qbdsoft/pip,davidovich/pip,msabramo/pip,chaoallsome/pip,sigmavirus24/pip,minrk/pip,blarghmatey/pip,dstufft/pip,haridsv/pip,cjerdonek/pip,supriyantomaftuh/pip,haridsv/pip,Gabriel439/pip,tdsmith/pip,jamezpolley/pip,benesch/pip,patricklaw/pip,h4ck3rm1k3/pip,KarelJakubec/pip,RonnyPfannschmidt/pip,xavfernandez/pip,wkeyword/pip,rouge8/pip,tdsmith/pip,RonnyPfannschmidt/pip,zvezdan/pip,jmagnusson/pip,RonnyPfannschmidt/pip,ChristopherHogan/pip,mujiansu/pip,jmagnusson/pip,mattrobenolt/pip,dstufft/pip,xavfernandez/pip,cjerdonek/pip,jythontools/pip,Gabriel439/pip,habnabit/pip,sigmavirus24/pip,techtonik/pip,willingc/pip,zorosteven/pip,esc/pip,qwcode/pip,luzfcb/pip