Source code for spack.cmd.python

# Copyright 2013-2021 Lawrence Livermore National Security, LLC and other
# Spack Project Developers. See the top-level COPYRIGHT file for details.
# SPDX-License-Identifier: (Apache-2.0 OR MIT)

from __future__ import print_function

import argparse
import code
import os
import platform
import runpy
import sys

import llnl.util.tty as tty

import spack

description = "launch an interpreter as spack would launch a command"
section = "developer"
level = "long"

[docs]def setup_parser(subparser): subparser.add_argument( '-V', '--version', action='store_true', help='print the Python version number and exit') subparser.add_argument( '-c', dest='python_command', help='command to execute') subparser.add_argument( '-i', dest='python_interpreter', help='python interpreter', choices=['python', 'ipython'], default='python') subparser.add_argument( '-m', dest='module', action='store', help='run library module as a script') subparser.add_argument( '--path', action='store_true', dest='show_path', help='show path to python interpreter that spack uses') subparser.add_argument( 'python_args', nargs=argparse.REMAINDER, help="file to run plus arguments")
[docs]def python(parser, args, unknown_args): if args.version: print('Python', platform.python_version()) return if args.show_path: print(sys.executable) return if args.module: sys.argv = ['spack-python'] + unknown_args + args.python_args runpy.run_module(args.module, run_name="__main__", alter_sys=True) return if unknown_args: tty.die("Unknown arguments:", " ".join(unknown_args)) # Unexpected behavior from supplying both if args.python_command and args.python_args: tty.die("You can only specify a command OR script, but not both.") # Run user choice of interpreter if args.python_interpreter == "ipython": return spack.cmd.python.ipython_interpreter(args) return spack.cmd.python.python_interpreter(args)
[docs]def ipython_interpreter(args): """An ipython interpreter is intended to be interactive, so it doesn't support running a script or arguments """ try: import IPython except ImportError: tty.die("ipython is not installed, install and try again.") if "PYTHONSTARTUP" in os.environ: startup_file = os.environ["PYTHONSTARTUP"] if os.path.isfile(startup_file): with open(startup_file) as startup: exec( # IPython can also support running a script OR command, not both if args.python_args: IPython.start_ipython(argv=args.python_args) elif args.python_command: IPython.start_ipython(argv=['-c', args.python_command]) else: header = ("Spack version %s\nPython %s, %s %s" % (spack.spack_version, platform.python_version(), platform.system(), platform.machine())) __name__ = "__main__" # noqa IPython.embed(module="__main__", header=header)
[docs]def python_interpreter(args): """A python interpreter is the default interpreter """ # Fake a main python shell by setting __name__ to __main__. console = code.InteractiveConsole({'__name__': '__main__', 'spack': spack}) if "PYTHONSTARTUP" in os.environ: startup_file = os.environ["PYTHONSTARTUP"] if os.path.isfile(startup_file): with open(startup_file) as startup: console.runsource(, startup_file, 'exec') if args.python_command: console.runsource(args.python_command) elif args.python_args: sys.argv = args.python_args with open(args.python_args[0]) as file: console.runsource(, args.python_args[0], 'exec') else: # Provides readline support, allowing user to use arrow keys console.push('import readline') console.interact("Spack version %s\nPython %s, %s %s" % (spack.spack_version, platform.python_version(), platform.system(), platform.machine()))