I have spent all day trying to install the Sage Cell package and have been quite frustrated. I have been following the instructions at:https://github.com/sagemath/sagecell
Seems pretty reasonable, huh?
First problem occurred at step 4, in the "UPDATE:" that requires a git pull. After attempting the git-pull many times, and googling the error I was getting, which was: fatal: https://github.com/ipython/ipython/pull/4195/info/refs?service=git-upload-pack not found: did you run git update-server-info on the server?
It seemed to be that either the pull had been deleted or I somehow didn't have permissions to get it. However, the instructions on the site: http://sage.math.washington.edu/home/jason/sagecell/README.html don't have the UPDATE so I figured I'd go ahead and attempt the install anyways. I ran ./sage -i http://sage.math.washington.edu/home/jason/sagecell-spkg/sagecell-2014-03-01.spkg and got a long, winded error which looks something like this:
Note: Bypassing https://pypi.python.org/simple/backports.ssl_match_hostname/ (disallowed host; see http://bit.ly/1dg9ijs for details).
Note: Bypassing https://pypi.python.org/simple/backports.ssl-match-hostname/ (disallowed host; see http://bit.ly/1dg9ijs for details).
Couldn't find index page for 'backports.ssl_match_hostname' (maybe misspelled?)
Scanning index of all packages (this may take a while)
Note: Bypassing https://pypi.python.org/simple/ (disallowed host; see http://bit.ly/1dg9ijs for details).
No local packages or download links found for backports.ssl-match-hostname
error: Could not find suitable distribution for Requirement.parse('backports.ssl-match-hostname')
Error installing tornado-3.2.tar.gz.
real 0m8.891s
user 0m2.315s
sys 0m0.933s
************************************************************************
Error installing package sagecell-2014-03-01
Followed by contact info for sage, who I have also emailed but am hoping for a response here as well.
I can't answer all this, but I am pretty sure that Sage currently has Ipython 1.2 or so, and Sage 6.3 will have Ipython 2.1 or so. My suspicion is hence that those steps are more than unnecessary.
Edit: However, this doesn't seem to be the cause of the backport error message... See this sage-devel thread:
I had to do
./sage -sh -c "easy_install backports.ssl-match-hostname"
before installing the package - this way this thing is downloaded and installed, while during installation of the package extra downloads are prohibited.