# coding: utf-8 """Utilities for installing Javascript extensions for the notebook""" # Copyright (c) IPython Development Team. # Distributed under the terms of the Modified BSD License. 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, ensure_dir_exists 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= 2: print("%s is out of date" % dest) return True if verbose 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. Windows support for symlinks requires Vista or above, Python 3, and a permission bit which only admin users have by default, so don't rely on it. 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 ensure_dir_exists(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) and not os.path.islink(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()