multiline shebang is wrong sometimes

[certik]

Sometimes I get this:

ondrej@kittiwake:/tmp$ ipython
launcher:Unable to launch '/nh/nest/u/ondrej/ext/py27/bin/../../../../../../../auto/netscratch/ondrej/opt/python/nkcg/bin/python2.7' (No such file or directory)
ondrej@kittiwake:/tmp$ 

and I think this is caused by the following fact:

$ ls /nh/nest/u/ondrej/ext/py27/bin/../../../../../../../auto/netscratch/ondrej/opt/python/nkcg/bin/python2.7
ls: cannot access /nh/nest/u/ondrej/ext/py27/bin/../../../../../../../auto/netscratch/ondrej/opt/python/nkcg/bin/python2.7: No such file or directory
$ ls /nh/nest/u/ondrej/ext/py27/bin/../../../../../../../../auto/netscratch/ondrej/opt/python/nkcg/bin/python2.7
/nh/nest/u/ondrej/ext/py27/bin/../../../../../../../../auto/netscratch/ondrej/opt/python/nkcg/bin/python2.7

it's missing one ../ in the path.

[certik]

Even other links are wrong, like this one is dead:

$ ll /nh/nest/u/ondrej/ext/py27/bin/ipython 
lrwxrwxrwx 1 ondrej cnls 72 Jun 14 12:45 /nh/nest/u/ondrej/ext/py27/bin/ipython -> ../../../../../../../auto/netscratch/ondrej/opt/ipython/hpv7/bin/ipython

So some relative path calculation gets it wrong when installing the profile.

[certik]

@dagss -- any ideas where exactly this is set? It must be some setup of symbolic links on my system, that hashdist gets surprised by, but I am not quite sure where this relative thing is calculated.

[dagss]

hashdist.core.fileutils.silent_relative_symlink calling os.path.relpath, called from hashdist.core.links.