allow system-wide paths for nbextensions

like kernel specs, default install is `/usr/local/share/jupyter/nbextensions`

add `--user` for .ipython/nbextensions path

IPython/html/nbextensions.py

@@ -8,6 +8,7 b' from __future__ import print_function'
 
 import os
 import shutil
+import sys
 import tarfile
 import zipfile
 from os.path import basename, join as pjoin
@@ -25,6 +26,34 b' from IPython.utils.py3compat import string_types, cast_unicode_py2'
 from IPython.utils.tempdir import TemporaryDirectory
 
 
+# Packagers: modify the next block if you store system-installed nbextensions elsewhere (unlikely)
+SYSTEM_NBEXTENSIONS_DIRS = []
+
+if os.name == 'nt':
+    programdata = os.environ.get('PROGRAMDATA', None)
+    if programdata: # PROGRAMDATA is not defined by default on XP.
+        SYSTEM_NBEXTENSIONS_DIRS = [pjoin(programdata, 'jupyter', 'nbextensions')]
+    prefixes = []
+else:
+    prefixes = ['/usr/local', '/usr']
+
+# add sys.prefix at the front
+if sys.prefix not in prefixes:
+    prefixes.insert(0, sys.prefix)
+
+for prefix in prefixes:
+    nbext = os.path.join(prefix, 'share', 'jupyter', 'nbextensions')
+    if nbext not in SYSTEM_NBEXTENSIONS_DIRS:
+        SYSTEM_NBEXTENSIONS_DIRS.append(nbext)
+
+if os.name == 'nt':
+    # PROGRAMDATA
+    SYSTEM_NBEXTENSIONS_INSTALL_DIR = SYSTEM_NBEXTENSIONS_DIRS[-1]
+else:
+    # /usr/local
+    SYSTEM_NBEXTENSIONS_INSTALL_DIR = SYSTEM_NBEXTENSIONS_DIRS[-2]
+
+
 def _should_copy(src, dest, verbose=1):
     """should a file be copied?"""
     if not os.path.exists(dest):
@@ -54,15 +83,17 b' def _safe_is_tarfile(path):'
         return False
 
 
-def check_nbextension(files, ipython_dir=None):
+def check_nbextension(files, nbextensions=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')
+    if nbextensions:
+        nbext = nbextensions
+    else:
+        nbext = pjoin(get_ipython_dir(), u'nbextensions')
     # make sure nbextensions dir exists
     if not os.path.exists(nbext):
         return False
@@ -74,7 +105,7 b' def check_nbextension(files, ipython_dir=None):'
     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):
+def install_nbextension(files, overwrite=False, symlink=False, user=False, prefix=None, nbextensions=None, verbose=1):
     """Install a Javascript extension for the notebook
     
     Stages files and/or directories into IPYTHONDIR/nbextensions.
@@ -96,16 +127,29 b' def install_nbextension(files, overwrite=False, symlink=False, ipython_dir=None,'
         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.
+    user : bool [default: False]
+        Whether to install to the user's .ipython/nbextensions directory.
+        Otherwise do a system-wide install (e.g. /usr/local/share/jupyter/nbextensions).
+    prefix : str [optional]
+        Specify install prefix, if it should differ from default (e.g. /usr/local).
+        Will install to prefix/share/jupyter/nbextensions
+    nbextensions : str [optional]
+        Specify absolute path of nbextensions directory explicitly.
     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')
+    if sum(map(bool, [user, prefix, nbextensions])) > 1:
+        raise ValueError("Cannot specify more than one of user, prefix, or nbextensions.")
+    if user:
+        nbext = pjoin(get_ipython_dir(), u'nbextensions')
+    else:
+        if prefix:
+            nbext = pjoin(prefix, 'share', 'jupyter', 'nbextensions')
+        elif nbextensions:
+            nbext = nbextensions
+        else:
+            nbext = SYSTEM_NBEXTENSIONS_INSTALL_DIR
     # make sure nbextensions dir exists
     ensure_dir_exists(nbext)
     
@@ -126,7 +170,7 b' def install_nbextension(files, overwrite=False, symlink=False, ipython_dir=None,'
                     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)
+                install_nbextension(local_path, overwrite=overwrite, symlink=symlink, nbextensions=nbext, verbose=verbose)
             continue
         
         # handle archives
@@ -183,7 +227,7 b' def install_nbextension(files, overwrite=False, symlink=False, ipython_dir=None,'
 # install nbextension app
 #----------------------------------------------------------------------
 
-from IPython.utils.traitlets import Bool, Enum
+from IPython.utils.traitlets import Bool, Enum, Unicode, TraitError
 from IPython.core.application import BaseIPythonApplication
 
 flags = {
@@ -207,11 +251,18 b' flags = {'
             "symlink" : True,
         }}, "Create symlinks instead of copying files"
     ),
+    "user" : ({
+        "NBExtensionApp" : {
+            "user" : True,
+        }}, "Install to the user's IPython directory"
+    ),
 }
 flags['s'] = flags['symlink']
 
 aliases = {
-    "ipython-dir" : "NBExtensionApp.ipython_dir"
+    "ipython-dir" : "NBExtensionApp.ipython_dir",
+    "prefix" : "NBExtensionApp.prefix",
+    "nbextensions" : "NBExtensionApp.nbextensions",
 }
 
 class NBExtensionApp(BaseIPythonApplication):
@@ -238,25 +289,36 b' class NBExtensionApp(BaseIPythonApplication):'
     
     overwrite = Bool(False, config=True, help="Force overwrite of existing files")
     symlink = Bool(False, config=True, help="Create symlinks instead of copying files")
+    user = Bool(False, config=True, help="Whether to do a user install")
+    prefix = Unicode('', config=True, help="Installation prefix")
+    nbextensions = Unicode('', config=True, help="Full path to nbextensions (probably use prefix or user)")
     verbose = Enum((0,1,2), default_value=1, config=True,
         help="Verbosity level"
     )
     
+    def check_install():
+        if sum(map(bool, [user, prefix, nbextensions])) > 1:
+            raise TraitError("Cannot specify more than one of user, prefix, or nbextensions.")
+    
     def install_extensions(self):
         install_nbextension(self.extra_args,
             overwrite=self.overwrite,
             symlink=self.symlink,
             verbose=self.verbose,
-            ipython_dir=self.ipython_dir,
+            user=self.user,
+            prefix=self.prefix,
+            nbextensions=self.nbextensions,
         )
     
     def start(self):
         if not self.extra_args:
-            nbext = pjoin(self.ipython_dir, u'nbextensions')
+            for nbext in [pjoin(self.ipython_dir, u'nbextensions')] + SYSTEM_NBEXTENSIONS_DIRS:
+                if os.path.exists(nbext):
             print("Notebook extensions in %s:" % nbext)
             for ext in os.listdir(nbext):
                 print(u"    %s" % ext)
         else:
+            self.check_install()
             self.install_extensions()
 
 

IPython/html/notebookapp.py

@@ -90,6 +90,7 b' from IPython.utils import py3compat'
 from IPython.utils.path import filefind, get_ipython_dir
 from IPython.utils.sysinfo import get_sys_info
 
+from .nbextensions import SYSTEM_NBEXTENSIONS_DIRS
 from .utils import url_path_join
 
 #-----------------------------------------------------------------------------
@@ -566,11 +567,14 b' class NotebookApp(BaseIPythonApplication):'
         """return extra paths + the default locations"""
         return self.extra_template_paths + DEFAULT_TEMPLATE_PATH_LIST
 
-    nbextensions_path = List(Unicode, config=True,
-        help="""paths for Javascript extensions. By default, this is just IPYTHONDIR/nbextensions"""
+    extra_nbextensions_path = List(Unicode, config=True,
+        help="""extra paths to look for Javascript notebook extensions"""
     )
-    def _nbextensions_path_default(self):
-        return [os.path.join(get_ipython_dir(), 'nbextensions')]
+    
+    @property
+    def nbextensions_path(self):
+        """The path to look for Javascript notebook extensions"""
+        return self.extra_nbextensions_path + [os.path.join(get_ipython_dir(), 'nbextensions')] + SYSTEM_NBEXTENSIONS_DIRS
 
     websocket_url = Unicode("", config=True,
         help="""The base URL for websockets,

IPython/html/tests/test_nbextensions.py

@@ -1,15 +1,8 b''
 # coding: utf-8
 """Test installation of notebook extensions"""
-#-----------------------------------------------------------------------------
-#  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.
-#-----------------------------------------------------------------------------
 
-#-----------------------------------------------------------------------------
-# Imports
-#-----------------------------------------------------------------------------
+# Copyright (c) IPython Development Team.
+# Distributed under the terms of the Modified BSD License.
 
 import glob
 import os
@@ -27,9 +20,6 b' from IPython.utils.tempdir import TemporaryDirectory'
 from IPython.html import nbextensions
 from IPython.html.nbextensions import install_nbextension, check_nbextension
 
-#-----------------------------------------------------------------------------
-# Test functions
-#-----------------------------------------------------------------------------
 
 def touch(file, mtime=None):
     """ensure a file exists, and set its modification time
@@ -43,7 +33,6 b' def touch(file, mtime=None):'
         os.utime(file, (atime, mtime))
     return os.stat(file).st_mtime
 
-
 class TestInstallNBExtension(TestCase):
     
     def tempdir(self):
@@ -69,11 +58,14 b' class TestInstallNBExtension(TestCase):'
         self.ipdir = self.tempdir()
         self.save_get_ipython_dir = nbextensions.get_ipython_dir
         nbextensions.get_ipython_dir = lambda : self.ipdir
+        self.save_system_dir = nbextensions.SYSTEM_NBEXTENSIONS_INSTALL_DIR
+        nbextensions.SYSTEM_NBEXTENSIONS_INSTALL_DIR = self.system_nbext = self.tempdir()
     
     def tearDown(self):
+        nbextensions.get_ipython_dir = self.save_get_ipython_dir
+        nbextensions.SYSTEM_NBEXTENSIONS_INSTALL_DIR = self.save_system_dir
         for td in self.tempdirs:
             td.cleanup()
-        nbextensions.get_ipython_dir = self.save_get_ipython_dir
     
     def assert_dir_exists(self, path):
         if not os.path.exists(path):
@@ -84,21 +76,29 b' class TestInstallNBExtension(TestCase):'
         if os.path.exists(path):
             self.fail(u"%s should not exist" % path)
     
-    def assert_installed(self, relative_path, ipdir=None):
+    def assert_installed(self, relative_path, user=False):
+        if user:
+            nbext = pjoin(self.ipdir, u'nbextensions')
+        else:
+            nbext = self.system_nbext
         self.assert_dir_exists(
-            pjoin(ipdir or self.ipdir, u'nbextensions', relative_path)
+            pjoin(nbext, relative_path)
         )
     
-    def assert_not_installed(self, relative_path, ipdir=None):
+    def assert_not_installed(self, relative_path, user=False):
+        if user:
+            nbext = pjoin(self.ipdir, u'nbextensions')
+        else:
+            nbext = self.system_nbext
         self.assert_not_dir_exists(
-            pjoin(ipdir or self.ipdir, u'nbextensions', relative_path)
+            pjoin(nbext, relative_path)
         )
     
     def test_create_ipython_dir(self):
         """install_nbextension when ipython_dir doesn't exist"""
         with TemporaryDirectory() as td:
-            ipdir = pjoin(td, u'ipython')
-            install_nbextension(self.src, ipython_dir=ipdir)
+            self.ipdir = ipdir = pjoin(td, u'ipython')
+            install_nbextension(self.src, user=True)
             self.assert_dir_exists(ipdir)
             for file in self.files:
                 self.assert_installed(
@@ -106,12 +106,22 b' class TestInstallNBExtension(TestCase):'
                     ipdir
                 )
     
-    def test_create_nbextensions(self):
-        with TemporaryDirectory() as ipdir:
-            install_nbextension(self.src, ipython_dir=ipdir)
+    def test_create_nbextensions_user(self):
+        with TemporaryDirectory() as td:
+            self.ipdir = ipdir = pjoin(td, u'ipython')
+            install_nbextension(self.src, user=True)
             self.assert_installed(
                 pjoin(basename(self.src), u'ƒile'),
-                ipdir
+                user=True
+            )
+    
+    def test_create_nbextensions_system(self):
+        with TemporaryDirectory() as td:
+            nbextensions.SYSTEM_NBEXTENSIONS_INSTALL_DIR = self.system_nbext = pjoin(td, u'nbextensions')
+            install_nbextension(self.src, user=False)
+            self.assert_installed(
+                pjoin(basename(self.src), u'ƒile'),
+                user=False
             )
     
     def test_single_file(self):
@@ -136,7 +146,7 b' class TestInstallNBExtension(TestCase):'
             with open(src, 'w') as f:
                 f.write('first')
             mtime = touch(src)
-            dest = pjoin(self.ipdir, u'nbextensions', fname)
+            dest = pjoin(self.system_nbext, fname)
             install_nbextension(src)
             with open(src, 'w') as f:
                 f.write('overwrite')
@@ -147,7 +157,6 b' class TestInstallNBExtension(TestCase):'
     
     def test_overwrite_dir(self):
         with TemporaryDirectory() as src:
-            # src = py3compat.cast_unicode_py2(src)
             base = basename(src)
             fname = u'ƒ.js'
             touch(pjoin(src, fname))
@@ -169,7 +178,7 b' class TestInstallNBExtension(TestCase):'
             mtime = touch(src)
             install_nbextension(src)
             self.assert_installed(fname)
-            dest = pjoin(self.ipdir, u'nbextensions', fname)
+            dest = pjoin(self.system_nbext, fname)
             old_mtime = os.stat(dest).st_mtime
             with open(src, 'w') as f:
                 f.write('overwrite')
@@ -185,7 +194,7 b' class TestInstallNBExtension(TestCase):'
             mtime = touch(src)
             install_nbextension(src)
             self.assert_installed(fname)
-            dest = pjoin(self.ipdir, u'nbextensions', fname)
+            dest = pjoin(self.system_nbext, fname)
             old_mtime = os.stat(dest).st_mtime
             
             mtime = touch(src, mtime - 100)
@@ -239,11 +248,12 b' class TestInstallNBExtension(TestCase):'
             f = u'ƒ.js'
             src = pjoin(d, f)
             touch(src)
-            install_nbextension(src)
+            install_nbextension(src, user=True)
         
-        assert check_nbextension(f, self.ipdir)
-        assert check_nbextension([f], self.ipdir)
-        assert not check_nbextension([f, pjoin('dne', f)], self.ipdir)
+        nbext = pjoin(self.ipdir, u'nbextensions')
+        assert check_nbextension(f, nbext)
+        assert check_nbextension([f], nbext)
+        assert not check_nbextension([f, pjoin('dne', f)], nbext)
     
     @dec.skip_win32
     def test_install_symlink(self):
@@ -252,7 +262,7 b' class TestInstallNBExtension(TestCase):'
             src = pjoin(d, f)
             touch(src)
             install_nbextension(src, symlink=True)
-        dest = pjoin(self.ipdir, u'nbextensions', f)
+        dest = pjoin(self.system_nbext, f)
         assert os.path.islink(dest)
         link = os.readlink(dest)
         self.assertEqual(link, src)