/usr/lib/python2.7/dist-packages/IPython/html/nbextensions.py is in ipython-notebook 2.3.0-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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"""Utilities for installing Javascript extensions for the notebook"""
#-----------------------------------------------------------------------------
# Copyright (C) 2014 The IPython Development Team
#
# Distributed under the terms of the BSD License. The full license is in
# the file COPYING, distributed as part of this software.
#-----------------------------------------------------------------------------
from __future__ import print_function
import os
import shutil
import tarfile
import zipfile
from os.path import basename, join as pjoin
# Deferred imports
try:
from urllib.parse import urlparse # Py3
from urllib.request import urlretrieve
except ImportError:
from urlparse import urlparse
from urllib import urlretrieve
from IPython.utils.path import get_ipython_dir
from IPython.utils.py3compat import string_types, cast_unicode_py2
from IPython.utils.tempdir import TemporaryDirectory
def _should_copy(src, dest, verbose=1):
"""should a file be copied?"""
if not os.path.exists(dest):
return True
if os.stat(dest).st_mtime < os.stat(src).st_mtime:
if verbose >= 2:
print("%s is out of date" % dest)
return True
if verbose >= 2:
print("%s is up to date" % dest)
return False
def _maybe_copy(src, dest, verbose=1):
"""copy a file if it needs updating"""
if _should_copy(src, dest, verbose):
if verbose >= 1:
print("copying %s -> %s" % (src, dest))
shutil.copy2(src, dest)
def _safe_is_tarfile(path):
"""safe version of is_tarfile, return False on IOError"""
try:
return tarfile.is_tarfile(path)
except IOError:
return False
def check_nbextension(files, ipython_dir=None):
"""Check whether nbextension files have been installed
files should be a list of relative paths within nbextensions.
Returns True if all files are found, False if any are missing.
"""
ipython_dir = ipython_dir or get_ipython_dir()
nbext = pjoin(ipython_dir, u'nbextensions')
# make sure nbextensions dir exists
if not os.path.exists(nbext):
return False
if isinstance(files, string_types):
# one file given, turn it into a list
files = [files]
return all(os.path.exists(pjoin(nbext, f)) for f in files)
def install_nbextension(files, overwrite=False, symlink=False, ipython_dir=None, verbose=1):
"""Install a Javascript extension for the notebook
Stages files and/or directories into IPYTHONDIR/nbextensions.
By default, this compares modification time, and only stages files that need updating.
If `overwrite` is specified, matching files are purged before proceeding.
Parameters
----------
files : list(paths or URLs)
One or more paths or URLs to existing files directories to install.
These will be installed with their base name, so '/path/to/foo'
will install to 'nbextensions/foo'.
Archives (zip or tarballs) will be extracted into the nbextensions directory.
overwrite : bool [default: False]
If True, always install the files, regardless of what may already be installed.
symlink : bool [default: False]
If True, create a symlink in nbextensions, rather than copying files.
Not allowed with URLs or archives.
ipython_dir : str [optional]
The path to an IPython directory, if the default value is not desired.
get_ipython_dir() is used by default.
verbose : int [default: 1]
Set verbosity level. The default is 1, where file actions are printed.
set verbose=2 for more output, or verbose=0 for silence.
"""
ipython_dir = ipython_dir or get_ipython_dir()
nbext = pjoin(ipython_dir, u'nbextensions')
# make sure nbextensions dir exists
if not os.path.exists(nbext):
os.makedirs(nbext)
if isinstance(files, string_types):
# one file given, turn it into a list
files = [files]
for path in map(cast_unicode_py2, files):
if path.startswith(('https://', 'http://')):
if symlink:
raise ValueError("Cannot symlink from URLs")
# Given a URL, download it
with TemporaryDirectory() as td:
filename = urlparse(path).path.split('/')[-1]
local_path = os.path.join(td, filename)
if verbose >= 1:
print("downloading %s to %s" % (path, local_path))
urlretrieve(path, local_path)
# now install from the local copy
install_nbextension(local_path, overwrite, symlink, ipython_dir, verbose)
continue
# handle archives
archive = None
if path.endswith('.zip'):
archive = zipfile.ZipFile(path)
elif _safe_is_tarfile(path):
archive = tarfile.open(path)
if archive:
if symlink:
raise ValueError("Cannot symlink from archives")
if verbose >= 1:
print("extracting %s to %s" % (path, nbext))
archive.extractall(nbext)
archive.close()
continue
dest = pjoin(nbext, basename(path))
if overwrite and os.path.exists(dest):
if verbose >= 1:
print("removing %s" % dest)
if os.path.isdir(dest):
shutil.rmtree(dest)
else:
os.remove(dest)
if symlink:
path = os.path.abspath(path)
if not os.path.exists(dest):
if verbose >= 1:
print("symlink %s -> %s" % (dest, path))
os.symlink(path, dest)
continue
if os.path.isdir(path):
strip_prefix_len = len(path) - len(basename(path))
for parent, dirs, files in os.walk(path):
dest_dir = pjoin(nbext, parent[strip_prefix_len:])
if not os.path.exists(dest_dir):
if verbose >= 2:
print("making directory %s" % dest_dir)
os.makedirs(dest_dir)
for file in files:
src = pjoin(parent, file)
# print("%r, %r" % (dest_dir, file))
dest = pjoin(dest_dir, file)
_maybe_copy(src, dest, verbose)
else:
src = path
_maybe_copy(src, dest, verbose)
#----------------------------------------------------------------------
# install nbextension app
#----------------------------------------------------------------------
from IPython.utils.traitlets import Bool, Enum
from IPython.core.application import BaseIPythonApplication
flags = {
"overwrite" : ({
"NBExtensionApp" : {
"overwrite" : True,
}}, "Force overwrite of existing files"
),
"debug" : ({
"NBExtensionApp" : {
"verbose" : 2,
}}, "Extra output"
),
"quiet" : ({
"NBExtensionApp" : {
"verbose" : 0,
}}, "Minimal output"
),
"symlink" : ({
"NBExtensionApp" : {
"symlink" : True,
}}, "Create symlinks instead of copying files"
),
}
flags['s'] = flags['symlink']
aliases = {
"ipython-dir" : "NBExtensionApp.ipython_dir"
}
class NBExtensionApp(BaseIPythonApplication):
"""Entry point for installing notebook extensions"""
description = """Install IPython notebook extensions
Usage
ipython install-nbextension file [more files, folders, archives or urls]
This copies files and/or folders into the IPython nbextensions directory.
If a URL is given, it will be downloaded.
If an archive is given, it will be extracted into nbextensions.
If the requested files are already up to date, no action is taken
unless --overwrite is specified.
"""
examples = """
ipython install-nbextension /path/to/d3.js /path/to/myextension
"""
aliases = aliases
flags = flags
overwrite = Bool(False, config=True, help="Force overwrite of existing files")
symlink = Bool(False, config=True, help="Create symlinks instead of copying files")
verbose = Enum((0,1,2), default_value=1, config=True,
help="Verbosity level"
)
def install_extensions(self):
install_nbextension(self.extra_args,
overwrite=self.overwrite,
symlink=self.symlink,
verbose=self.verbose,
ipython_dir=self.ipython_dir,
)
def start(self):
if not self.extra_args:
nbext = pjoin(self.ipython_dir, u'nbextensions')
print("Notebook extensions in %s:" % nbext)
for ext in os.listdir(nbext):
print(u" %s" % ext)
else:
self.install_extensions()
if __name__ == '__main__':
NBExtensionApp.launch_instance()
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