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# coding: utf-8
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"""Utilities for installing Javascript extensions for the notebook"""
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# Copyright (c) IPython Development Team.
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# Distributed under the terms of the Modified BSD License.
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from __future__ import print_function
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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 zipfile
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import uuid
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from os.path import basename, join as pjoin
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# Deferred imports
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try:
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from urllib.parse import urlparse # Py3
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from urllib.request import urlretrieve
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except ImportError:
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from urlparse import urlparse
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from urllib import urlretrieve
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from IPython.utils.path import get_ipython_dir, ensure_dir_exists
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from IPython.utils.py3compat import string_types, cast_unicode_py2
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from IPython.utils.tempdir import TemporaryDirectory
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class ArgumentConflict(ValueError):
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pass
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# Packagers: modify the next block if you store system-installed nbextensions elsewhere (unlikely)
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SYSTEM_NBEXTENSIONS_DIRS = []
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if os.name == 'nt':
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programdata = os.environ.get('PROGRAMDATA', None)
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if programdata: # PROGRAMDATA is not defined by default on XP.
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SYSTEM_NBEXTENSIONS_DIRS = [pjoin(programdata, 'jupyter', 'nbextensions')]
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prefixes = []
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else:
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prefixes = [os.path.sep + pjoin('usr', 'local'), os.path.sep + 'usr']
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# add sys.prefix at the front
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if sys.prefix not in prefixes:
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prefixes.insert(0, sys.prefix)
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for prefix in prefixes:
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nbext = pjoin(prefix, 'share', 'jupyter', 'nbextensions')
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if nbext not in SYSTEM_NBEXTENSIONS_DIRS:
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SYSTEM_NBEXTENSIONS_DIRS.append(nbext)
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if os.name == 'nt':
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# PROGRAMDATA
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SYSTEM_NBEXTENSIONS_INSTALL_DIR = SYSTEM_NBEXTENSIONS_DIRS[-1]
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else:
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# /usr/local
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SYSTEM_NBEXTENSIONS_INSTALL_DIR = SYSTEM_NBEXTENSIONS_DIRS[-2]
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def _should_copy(src, dest, verbose=1):
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"""should a file be copied?"""
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if not os.path.exists(dest):
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return True
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if os.stat(src).st_mtime - os.stat(dest).st_mtime > 1e-6:
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# we add a fudge factor to work around a bug in python 2.x
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# that was fixed in python 3.x: http://bugs.python.org/issue12904
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if verbose >= 2:
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print("%s is out of date" % dest)
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return True
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if verbose >= 2:
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print("%s is up to date" % dest)
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return False
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def _maybe_copy(src, dest, verbose=1):
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"""copy a file if it needs updating"""
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if _should_copy(src, dest, verbose):
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if verbose >= 1:
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print("copying %s -> %s" % (src, dest))
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shutil.copy2(src, dest)
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def _safe_is_tarfile(path):
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"""safe version of is_tarfile, return False on IOError"""
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try:
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return tarfile.is_tarfile(path)
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except IOError:
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return False
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def _get_nbext_dir(nbextensions_dir=None, user=False, prefix=None):
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"""Return the nbextension directory specified"""
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if sum(map(bool, [user, prefix, nbextensions_dir])) > 1:
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raise ArgumentConflict("Cannot specify more than one of user, prefix, or nbextensions_dir.")
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if user:
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nbext = pjoin(get_ipython_dir(), u'nbextensions')
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else:
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if prefix:
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nbext = pjoin(prefix, 'share', 'jupyter', 'nbextensions')
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elif nbextensions_dir:
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nbext = nbextensions_dir
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else:
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nbext = SYSTEM_NBEXTENSIONS_INSTALL_DIR
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return nbext
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def check_nbextension(files, user=False, prefix=None, nbextensions_dir=None):
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"""Check whether nbextension files have been installed
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Returns True if all files are found, False if any are missing.
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Parameters
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----------
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files : list(paths)
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a list of relative paths within nbextensions.
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user : bool [default: False]
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Whether to check the user's .ipython/nbextensions directory.
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Otherwise check a system-wide install (e.g. /usr/local/share/jupyter/nbextensions).
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prefix : str [optional]
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Specify install prefix, if it should differ from default (e.g. /usr/local).
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Will check prefix/share/jupyter/nbextensions
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nbextensions_dir : str [optional]
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Specify absolute path of nbextensions directory explicitly.
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"""
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nbext = _get_nbext_dir(nbextensions_dir, user, prefix)
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# make sure nbextensions dir exists
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if not os.path.exists(nbext):
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return False
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if isinstance(files, string_types):
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# one file given, turn it into a list
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files = [files]
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return all(os.path.exists(pjoin(nbext, f)) for f in files)
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def install_nbextension(path, overwrite=False, symlink=False, user=False, prefix=None, nbextensions_dir=None, destination=None, verbose=1):
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"""Install a Javascript extension for the notebook
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Stages files and/or directories into the nbextensions directory.
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By default, this compares modification time, and only stages files that need updating.
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If `overwrite` is specified, matching files are purged before proceeding.
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Parameters
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----------
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path : path to file, directory, zip or tarball archive, or URL to install
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By default, the file will be installed with its base name, so '/path/to/foo'
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will install to 'nbextensions/foo'. See the destination argument below to change this.
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Archives (zip or tarballs) will be extracted into the nbextensions directory.
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overwrite : bool [default: False]
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If True, always install the files, regardless of what may already be installed.
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symlink : bool [default: False]
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If True, create a symlink in nbextensions, rather than copying files.
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Not allowed with URLs or archives. Windows support for symlinks requires
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Vista or above, Python 3, and a permission bit which only admin users
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have by default, so don't rely on it.
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user : bool [default: False]
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Whether to install to the user's .ipython/nbextensions directory.
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Otherwise do a system-wide install (e.g. /usr/local/share/jupyter/nbextensions).
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prefix : str [optional]
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Specify install prefix, if it should differ from default (e.g. /usr/local).
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Will install to prefix/share/jupyter/nbextensions
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nbextensions_dir : str [optional]
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Specify absolute path of nbextensions directory explicitly.
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destination : str [optional]
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name the nbextension is installed to. For example, if destination is 'foo', then
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the source file will be installed to 'nbextensions/foo', regardless of the source name.
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This cannot be specified if an archive is given as the source.
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verbose : int [default: 1]
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Set verbosity level. The default is 1, where file actions are printed.
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set verbose=2 for more output, or verbose=0 for silence.
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"""
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nbext = _get_nbext_dir(nbextensions_dir, user, prefix)
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# make sure nbextensions dir exists
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ensure_dir_exists(nbext)
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if isinstance(path, (list, tuple)):
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raise TypeError("path must be a string pointing to a single extension to install; call this function multiple times to install multiple extensions")
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path = cast_unicode_py2(path)
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if path.startswith(('https://', 'http://')):
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if symlink:
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raise ValueError("Cannot symlink from URLs")
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# Given a URL, download it
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with TemporaryDirectory() as td:
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filename = urlparse(path).path.split('/')[-1]
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local_path = os.path.join(td, filename)
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if verbose >= 1:
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print("downloading %s to %s" % (path, local_path))
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urlretrieve(path, local_path)
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# now install from the local copy
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install_nbextension(local_path, overwrite=overwrite, symlink=symlink, nbextensions_dir=nbext, destination=destination, verbose=verbose)
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elif path.endswith('.zip') or _safe_is_tarfile(path):
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if symlink:
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raise ValueError("Cannot symlink from archives")
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if destination:
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raise ValueError("Cannot give destination for archives")
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if verbose >= 1:
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print("extracting %s to %s" % (path, nbext))
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if path.endswith('.zip'):
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archive = zipfile.ZipFile(path)
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elif _safe_is_tarfile(path):
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archive = tarfile.open(path)
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archive.extractall(nbext)
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archive.close()
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else:
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if not destination:
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destination = basename(path)
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destination = cast_unicode_py2(destination)
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full_dest = pjoin(nbext, destination)
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if overwrite and os.path.lexists(full_dest):
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if verbose >= 1:
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print("removing %s" % full_dest)
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if os.path.isdir(full_dest) and not os.path.islink(full_dest):
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shutil.rmtree(full_dest)
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else:
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os.remove(full_dest)
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if symlink:
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path = os.path.abspath(path)
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if not os.path.exists(full_dest):
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if verbose >= 1:
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print("symlink %s -> %s" % (full_dest, path))
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os.symlink(path, full_dest)
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elif os.path.isdir(path):
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path = pjoin(os.path.abspath(path), '') # end in path separator
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for parent, dirs, files in os.walk(path):
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dest_dir = pjoin(full_dest, parent[len(path):])
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if not os.path.exists(dest_dir):
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if verbose >= 2:
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print("making directory %s" % dest_dir)
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os.makedirs(dest_dir)
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for file in files:
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src = pjoin(parent, file)
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# print("%r, %r" % (dest_dir, file))
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dest_file = pjoin(dest_dir, file)
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_maybe_copy(src, dest_file, verbose)
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else:
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src = path
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_maybe_copy(src, full_dest, verbose)
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#----------------------------------------------------------------------
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# install nbextension app
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#----------------------------------------------------------------------
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from IPython.utils.traitlets import Bool, Enum, Unicode, TraitError
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from IPython.core.application import BaseIPythonApplication
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flags = {
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"overwrite" : ({
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"NBExtensionApp" : {
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"overwrite" : True,
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}}, "Force overwrite of existing files"
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),
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"debug" : ({
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"NBExtensionApp" : {
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"verbose" : 2,
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}}, "Extra output"
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),
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"quiet" : ({
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"NBExtensionApp" : {
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"verbose" : 0,
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}}, "Minimal output"
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),
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"symlink" : ({
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"NBExtensionApp" : {
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"symlink" : True,
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}}, "Create symlink instead of copying files"
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),
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"user" : ({
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"NBExtensionApp" : {
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"user" : True,
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}}, "Install to the user's IPython directory"
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),
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}
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flags['s'] = flags['symlink']
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aliases = {
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"ipython-dir" : "NBExtensionApp.ipython_dir",
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"prefix" : "NBExtensionApp.prefix",
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"nbextensions" : "NBExtensionApp.nbextensions_dir",
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"destination" : "NBExtensionApp.destination",
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}
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class NBExtensionApp(BaseIPythonApplication):
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"""Entry point for installing notebook extensions"""
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description = """Install IPython notebook extensions
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Usage
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ipython install-nbextension path/url
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This copies a file or a folder into the IPython nbextensions directory.
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If a URL is given, it will be downloaded.
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If an archive is given, it will be extracted into nbextensions.
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If the requested files are already up to date, no action is taken
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unless --overwrite is specified.
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"""
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examples = """
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ipython install-nbextension /path/to/myextension
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"""
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aliases = aliases
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flags = flags
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overwrite = Bool(False, config=True, help="Force overwrite of existing files")
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symlink = Bool(False, config=True, help="Create symlinks instead of copying files")
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user = Bool(False, config=True, help="Whether to do a user install")
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prefix = Unicode('', config=True, help="Installation prefix")
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nbextensions_dir = Unicode('', config=True, help="Full path to nbextensions dir (probably use prefix or user)")
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destination = Unicode('', config=True, help="Destination for the copy or symlink")
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verbose = Enum((0,1,2), default_value=1, config=True,
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help="Verbosity level"
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)
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def install_extensions(self):
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if len(self.extra_args)>1:
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raise ValueError("only one nbextension allowed at a time. Call multiple times to install multiple extensions.")
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install_nbextension(self.extra_args[0],
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overwrite=self.overwrite,
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symlink=self.symlink,
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verbose=self.verbose,
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user=self.user,
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prefix=self.prefix,
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destination=self.destination,
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nbextensions_dir=self.nbextensions_dir,
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)
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def start(self):
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if not self.extra_args:
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for nbext in [pjoin(self.ipython_dir, u'nbextensions')] + SYSTEM_NBEXTENSIONS_DIRS:
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if os.path.exists(nbext):
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print("Notebook extensions in %s:" % nbext)
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for ext in os.listdir(nbext):
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print(u" %s" % ext)
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else:
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try:
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self.install_extensions()
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except ArgumentConflict as e:
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print(str(e), file=sys.stderr)
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self.exit(1)
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if __name__ == '__main__':
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NBExtensionApp.launch_instance()
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