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##############################################################################
# Copyright (c) 2013, Lawrence Livermore National Security, LLC.
# Produced at the Lawrence Livermore National Laboratory.
#
# This file is part of Spack.
# Written by Todd Gamblin, tgamblin@llnl.gov, All rights reserved.
# LLNL-CODE-647188
#
# For details, see https://scalability-llnl.github.io/spack
# Please also see the LICENSE file for our notice and the LGPL.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License (as published by
# the Free Software Foundation) version 2.1 dated February 1999.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the terms and
# conditions of the GNU General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
##############################################################################
__all__ = ['Executable', 'when']
import os
import sys
import re
import subprocess
import llnl.util.tty as tty
from spack.error import SpackError
class Executable(object):
"""Class representing a program that can be run on the command line."""
def __init__(self, name):
self.exe = name.split(' ')
self.returncode = None
def add_default_arg(self, arg):
self.exe.append(arg)
@property
def command(self):
return ' '.join(self.exe)
def __call__(self, *args, **kwargs):
"""Run the executable with subprocess.check_output, return output."""
return_output = kwargs.get("return_output", False)
fail_on_error = kwargs.get("fail_on_error", True)
quoted_args = [arg for arg in args if re.search(r'^"|^\'|"$|\'$', arg)]
if quoted_args:
tty.warn("Quotes in command arguments can confuse scripts like configure.",
"The following arguments may cause problems when executed:",
str("\n".join([" "+arg for arg in quoted_args])),
"Quotes aren't needed because spack doesn't use a shell.",
"Consider removing them")
cmd = self.exe + list(args)
tty.verbose(" ".join(cmd))
try:
proc = subprocess.Popen(
cmd,
stderr=sys.stderr,
stdout=subprocess.PIPE if return_output else sys.stdout)
out, err = proc.communicate()
self.returncode = proc.returncode
if fail_on_error and proc.returncode != 0:
raise SpackError("command '%s' returned error code %d"
% (" ".join(cmd), proc.returncode))
if return_output:
return out
except subprocess.CalledProcessError, e:
if fail_on_error: raise
def __repr__(self):
return "<exe: %s>" % self.exe
def which(name, **kwargs):
"""Finds an executable in the path like command-line which."""
path = kwargs.get('path', os.environ.get('PATH', '').split(os.pathsep))
required = kwargs.get('required', False)
if not path:
path = []
for dir in path:
exe = os.path.join(dir, name)
if os.access(exe, os.X_OK):
return Executable(exe)
if required:
tty.die("spack requires %s. Make sure it is in your path." % name)
return None
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