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#
# Various functions
#
# Copyright (c) 2015 Red Hat, Inc.
# Author: Nikolai Kondrashov <Nikolai.Kondrashov@redhat.com>
#
# This 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 only
#
# 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 GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
import re
import os
import subprocess
UNINDENT_RE = re.compile("^ +", re.MULTILINE)
def unindent(text):
"""
Unindent text by removing at most the number of spaces present in
the first non-empty line from the beginning of every line.
"""
indent_ref = [0]
def replace(match):
if indent_ref[0] == 0:
indent_ref[0] = len(match.group())
return match.group()[indent_ref[0]:]
return UNINDENT_RE.sub(replace, text)
def run_shell():
"""
Execute an interactive shell under "screen", preserving environment.
For use as a breakpoint for debugging.
"""
subprocess.call([
"screen", "-D", "-m", "bash", "-c",
"PATH='" + os.getenv("PATH", "") + "' " +
"LD_LIBRARY_PATH='" + os.getenv("LD_LIBRARY_PATH", "") + "' " +
"LD_PRELOAD='" + os.getenv("LD_PRELOAD", "") + "' " +
"bash -i"
])
def first_dir(*args):
"""Return first argument that points to an existing directory."""
for arg in args:
if os.path.isdir(arg):
return arg
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