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#!/usr/bin/python
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"""Utility function for installing MathJax javascript library into
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the notebook's 'static' directory, for offline use.
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Authors:
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* Min RK
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* Mark Sienkiewicz
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* Matthias Bussonnier
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To download and install MathJax:
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From Python:
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>>> from IPython.external.mathjax import install_mathjax
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>>> install_mathjax()
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From the command line:
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$ python -m IPython.external.mathjax
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To install MathJax from a file you have already downloaded:
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$ python -m IPython.external.mathjax mathjax-xxx.tar.gz
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$ python -m IPython.external.mathjax mathjax-xxx.zip
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It will not install MathJax if it is already there. Use -r to
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replace the existing copy of MathJax.
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To find the directory where IPython would like MathJax installed:
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$ python -m IPython.external.mathjax -d
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"""
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#-----------------------------------------------------------------------------
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# Copyright (C) 2008-2011 The IPython Development Team
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#
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# Distributed under the terms of the BSD License. The full license is in
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# the file COPYING, distributed as part of this software.
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#-----------------------------------------------------------------------------
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#-----------------------------------------------------------------------------
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# Imports
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#-----------------------------------------------------------------------------
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import os
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import shutil
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import sys
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import tarfile
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import urllib2
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import zipfile
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from IPython.utils.path import locate_profile
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from IPython.external import argparse
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#-----------------------------------------------------------------------------
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#
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#-----------------------------------------------------------------------------
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# Where mathjax will be installed.
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static = os.path.join(locate_profile('default'), 'static')
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default_dest = os.path.join(static, 'mathjax')
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##
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# Test for access to install mathjax.
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def check_perms(dest, replace=False):
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parent = os.path.abspath(os.path.join(dest, os.path.pardir))
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components = dest.split(os.path.sep)
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subpaths = [ os.path.sep+os.path.sep.join(components[1:i]) for i in range(1,len(components))]
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existing_path = filter(os.path.exists, subpaths)
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last_writable = existing_path[-1]
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if not os.access(last_writable, os.W_OK):
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raise IOError("Need have write access to %s" % parent)
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not_existing = [ path for path in subpaths if path not in existing_path]
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# subfolder we will create, will obviously be writable
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# should we still considere checking separately that
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# ipython profiles have been created ?
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for folder in not_existing:
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os.mkdir(folder)
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if os.path.exists(dest):
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if replace:
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if not os.access(dest, os.W_OK):
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raise IOError("Need have write access to %s" % dest)
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print "removing previous MathJax install"
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shutil.rmtree(dest)
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return True
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else:
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print "offline MathJax apparently already installed"
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return False
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else :
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return True
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##
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def extract_tar( fd, dest ) :
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# use 'r|gz' stream mode, because socket file-like objects can't seek:
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tar = tarfile.open(fileobj=fd, mode='r|gz')
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# we just happen to know that the first entry in the mathjax
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# archive is the directory that the remaining members are in.
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topdir = tar.firstmember.path
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# extract the archive (contains a single directory) to the static/ directory
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parent = os.path.abspath(os.path.join(dest, os.path.pardir))
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tar.extractall(parent)
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# it will be mathjax-MathJax-<sha>, rename to just mathjax
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os.rename(os.path.join(parent, topdir), dest)
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##
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def extract_zip( fd, dest ) :
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z = zipfile.ZipFile( fd, 'r' )
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# we just happen to know that the first entry in the mathjax
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# archive is the directory that the remaining members are in.
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topdir = z.namelist()[0]
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# extract the archive (contains a single directory) to the static/ directory
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parent = os.path.abspath(os.path.join(dest, os.path.pardir))
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z.extractall( parent )
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# it will be mathjax-MathJax-<sha>, rename to just mathjax
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d = os.path.join(parent, topdir)
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print d
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os.rename(os.path.join(parent, topdir), dest)
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##
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def install_mathjax(tag='v2.0', dest=default_dest, replace=False, file=None, extractor=extract_tar ):
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"""Download and/or install MathJax for offline use.
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This will install mathjax to the 'static' dir in the IPython notebook
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package, so it will fail if the caller does not have write access
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to that location.
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MathJax is a ~15MB download, and ~150MB installed.
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Parameters
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----------
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replace : bool [False]
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Whether to remove and replace an existing install.
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dest : str [path to default profile]
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Where to locally install mathjax
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tag : str ['v2.0']
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Which tag to download. Default is 'v2.0', the current stable release,
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but alternatives include 'v1.1a' and 'master'.
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file : file like object [ defualt to content of https://github.com/mathjax/MathJax/tarball/#{tag}]
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File handle from which to untar/unzip/... mathjax
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extractor : function
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Method tu use to untar/unzip/... `file`
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"""
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if not check_perms(dest, replace) :
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return
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if file is None :
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# download mathjax
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mathjax_url = "https://github.com/mathjax/MathJax/tarball/%s" % tag
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print "Downloading mathjax source from %s" % mathjax_url
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response = urllib2.urlopen(mathjax_url)
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file = response.fp
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print "Extracting to %s" % dest
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extractor( file, dest )
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##
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def test_func( remove, dest) :
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"""See if mathjax appears to be installed correctly"""
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status = 0
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if not os.path.isdir( dest ) :
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print "%s directory not found" % dest
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status = 1
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if not os.path.exists( dest + "/MathJax.js" ) :
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print "MathJax.js not present in %s" % dest
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status = 1
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print "ok"
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if remove and os.path.exists(dest):
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shutil.rmtree( dest )
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return status
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##
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def main() :
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# This main is just simple enough that it is not worth the
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# complexity of argparse
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# What directory is mathjax in?
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parser = argparse.ArgumentParser(
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description="""Install mathjax from internet or local archive""",
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)
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parser.add_argument(
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'-i',
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'--install-dir',
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default=default_dest,
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help='installation directory (by default : %s)' % (default_dest))
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parser.add_argument(
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'-d',
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'--dest',
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action='store_true',
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help='print where is current mathjax would be installed and exit')
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parser.add_argument(
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'-r',
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'--replace',
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action='store_true',
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help='Wether to replace current mathjax if already exist')
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parser.add_argument(
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'-t',
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'--test',
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action='store_true')
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parser.add_argument('tarball',
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help="the local tar/zip-ball containing mathjax",
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nargs='?',
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metavar='tarball')
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pargs = parser.parse_args()
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dest = pargs.install_dir
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if pargs.dest :
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print dest
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return
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# remove/replace existing mathjax?
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if pargs.replace :
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replace = True
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else :
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replace = False
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# undocumented test interface
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if pargs.test :
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return test_func( replace, dest)
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# do it
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if pargs.tarball :
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fname = pargs.tarball
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# automatically detect zip/tar - could do something based
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# on file content, but really not cost-effective here.
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if fname.endswith('.zip') :
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extractor = extract_zip
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else :
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extractor = extract_tar
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# do it
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install_mathjax(file=open(fname, "r"), replace=replace, extractor=extractor, dest=dest )
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else:
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install_mathjax(replace=replace, dest=dest)
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if __name__ == '__main__' :
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sys.exit(main())
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__all__ = ['install_mathjax', 'main', 'dest']
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"""
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Test notes:
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IPython uses IPython.testing.iptest as a custom test controller
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(though it is based on nose). It might be possible to fit automatic
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tests of installation into that framework, but it looks awkward to me.
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So, here is a manual procedure for testing this automatic installer.
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Mark Sienkiewicz, 2012-08-06
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first 8 letters of my last name @ stsci.edu
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# remove mathjax from the installed ipython instance
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# IOError ok if mathjax was never installed yet.
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python -m IPython.external.mathjax --test -r
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# download and install mathjax from command line:
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python -m IPython.external.mathjax
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python -m IPython.external.mathjax --test -r
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# download and install from within python
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python -c "from IPython.external.mathjax import install_mathjax; install_mathjax()"
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python -m IPython.external.mathjax --test -r
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# view http://www.mathjax.org/download/ in your browser
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# save-as the link for MathJax-2.0 near the bottom of the page.
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# The file it offers is mathjax-MathJax-v2.0-20-g07669ac.zip
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python -m IPython.external.mathjax mathjax-MathJax-v2.0-20-g07669ac.zip
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python -m IPython.external.mathjax --test -r
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# download https://github.com/mathjax/MathJax/tarball/v2.0 in your browser
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# (this is the url used internally by install_mathjax)
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# The file it offers is mathjax-MathJax-v2.0-20-g07669ac.tar.gz
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python -m IPython.external.mathjax mathjax-MathJax-v2.0-20-g07669ac.tar.gz
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python -m IPython.external.mathjax --test
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# note no -r
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# install it again while it is already there
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python -m IPython.external.mathjax mathjax-MathJax-v2.0-20-g07669ac.tar.gz
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# says "offline MathJax apparently already installed"
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python -m IPython.external.mathjax ~/mathjax-MathJax-v2.0-20-g07669ac.tar.gz
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python -m IPython.external.mathjax --test
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"""
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