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#-------------------------------------------------------------------------
# CxxTest: A lightweight C++ unit testing library.
# Copyright (c) 2008 Sandia Corporation.
# This software is distributed under the LGPL License v3
# For more information, see the COPYING file in the top CxxTest directory.
# Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
# the U.S. Government retains certain rights in this software.
#-------------------------------------------------------------------------
import sys
import os
def abort( problem ):
'''Print error message and exit'''
sys.stderr.write( '\n' )
sys.stderr.write( problem )
sys.stderr.write( '\n\n' )
sys.exit(2)
if sys.version_info < (2,6): #pragma: no cover
def resolve_symlinks(orig_path):
drive,tmp = os.path.splitdrive(os.path.normpath(orig_path))
if not drive:
drive = os.path.sep
parts = tmp.split(os.path.sep)
actual_path = [drive]
while parts:
actual_path.append(parts.pop(0))
if not os.path.islink(os.path.join(*actual_path)):
continue
actual_path[-1] = os.readlink(os.path.join(*actual_path))
tmp_drive, tmp_path = os.path.splitdrive(
dereference_path(os.path.join(*actual_path)) )
if tmp_drive:
drive = tmp_drive
actual_path = [drive] + tmp_path.split(os.path.sep)
return os.path.join(*actual_path)
def relpath(path, start=None):
"""Return a relative version of a path.
(provides compatibility with Python < 2.6)"""
# Some notes on implementation:
# - We rely on resolve_symlinks to correctly resolve any symbolic
# links that may be present in the paths
# - The explicit handling od the drive name is critical for proper
# function on Windows (because os.path.join('c:','foo') yields
# "c:foo"!).
if not start:
start = os.getcwd()
ref_drive, ref_path = os.path.splitdrive(
resolve_symlinks(os.path.abspath(start)) )
if not ref_drive:
ref_drive = os.path.sep
start = [ref_drive] + ref_path.split(os.path.sep)
while '' in start:
start.remove('')
pth_drive, pth_path = os.path.splitdrive(
resolve_symlinks(os.path.abspath(path)) )
if not pth_drive:
pth_drive = os.path.sep
path = [pth_drive] + pth_path.split(os.path.sep)
while '' in path:
path.remove('')
i = 0
max = min(len(path), len(start))
while i < max and path[i] == start[i]:
i += 1
if i < 2:
return os.path.join(*path)
else:
rel = ['..']*(len(start)-i) + path[i:]
if rel:
return os.path.join(*rel)
else:
return '.'
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