|
|
"""Implementation of packaging-related magic functions.
|
|
|
"""
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Copyright (c) 2018 The IPython Development Team.
|
|
|
#
|
|
|
# Distributed under the terms of the Modified BSD License.
|
|
|
#
|
|
|
# The full license is in the file COPYING.txt, distributed with this software.
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
import os
|
|
|
import re
|
|
|
import shlex
|
|
|
import sys
|
|
|
|
|
|
from IPython.core.magic import Magics, magics_class, line_magic
|
|
|
|
|
|
|
|
|
def _is_conda_environment():
|
|
|
"""Return True if the current Python executable is in a conda env"""
|
|
|
# TODO: does this need to change on windows?
|
|
|
conda_history = os.path.join(sys.prefix, 'conda-meta', 'history')
|
|
|
return os.path.exists(conda_history)
|
|
|
|
|
|
|
|
|
def _get_conda_executable():
|
|
|
"""Find the path to the conda executable"""
|
|
|
# Check if there is a conda executable in the same directory as the Python executable.
|
|
|
# This is the case within conda's root environment.
|
|
|
conda = os.path.join(os.path.dirname(sys.executable), 'conda')
|
|
|
if os.path.isfile(conda):
|
|
|
return conda
|
|
|
|
|
|
# Otherwise, attempt to extract the executable from conda history.
|
|
|
# This applies in any conda environment.
|
|
|
R = re.compile(r"^#\s*cmd:\s*(?P<command>.*conda)\s[create|install]")
|
|
|
with open(os.path.join(sys.prefix, 'conda-meta', 'history')) as f:
|
|
|
for line in f:
|
|
|
match = R.match(line)
|
|
|
if match:
|
|
|
return match.groupdict()['command']
|
|
|
|
|
|
# Fallback: assume conda is available on the system path.
|
|
|
return "conda"
|
|
|
|
|
|
|
|
|
CONDA_COMMANDS_REQUIRING_PREFIX = {
|
|
|
'install', 'list', 'remove', 'uninstall', 'update', 'upgrade',
|
|
|
}
|
|
|
CONDA_COMMANDS_REQUIRING_YES = {
|
|
|
'install', 'remove', 'uninstall', 'update', 'upgrade',
|
|
|
}
|
|
|
CONDA_ENV_FLAGS = {'-p', '--prefix', '-n', '--name'}
|
|
|
CONDA_YES_FLAGS = {'-y', '--y'}
|
|
|
|
|
|
|
|
|
@magics_class
|
|
|
class PackagingMagics(Magics):
|
|
|
"""Magics related to packaging & installation"""
|
|
|
|
|
|
@line_magic
|
|
|
def pip(self, line):
|
|
|
"""Run the pip package manager within the current kernel.
|
|
|
|
|
|
Usage:
|
|
|
%pip install [pkgs]
|
|
|
"""
|
|
|
self.shell.system(' '.join([sys.executable, '-m', 'pip', line]))
|
|
|
print("Note: you may need to restart the kernel to use updated packages.")
|
|
|
|
|
|
@line_magic
|
|
|
def conda(self, line):
|
|
|
"""Run the conda package manager within the current kernel.
|
|
|
|
|
|
Usage:
|
|
|
%conda install [pkgs]
|
|
|
"""
|
|
|
if not _is_conda_environment():
|
|
|
raise ValueError("The python kernel does not appear to be a conda environment. "
|
|
|
"Please use ``%pip install`` instead.")
|
|
|
|
|
|
conda = _get_conda_executable()
|
|
|
args = shlex.split(line)
|
|
|
command = args[0]
|
|
|
args = args[1:]
|
|
|
extra_args = []
|
|
|
|
|
|
# When the subprocess does not allow us to respond "yes" during the installation,
|
|
|
# we need to insert --yes in the argument list for some commands
|
|
|
stdin_disabled = getattr(self.shell, 'kernel', None) is not None
|
|
|
needs_yes = command in CONDA_COMMANDS_REQUIRING_YES
|
|
|
has_yes = set(args).intersection(CONDA_YES_FLAGS)
|
|
|
if stdin_disabled and needs_yes and not has_yes:
|
|
|
extra_args.append("--yes")
|
|
|
|
|
|
# Add --prefix to point conda installation to the current environment
|
|
|
needs_prefix = command in CONDA_COMMANDS_REQUIRING_PREFIX
|
|
|
has_prefix = set(args).intersection(CONDA_ENV_FLAGS)
|
|
|
if needs_prefix and not has_prefix:
|
|
|
extra_args.extend(["--prefix", sys.prefix])
|
|
|
|
|
|
self.shell.system(' '.join([conda, command] + extra_args + args))
|
|
|
print("\nNote: you may need to restart the kernel to use updated packages.")
|
|
|
|
