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import os, sys
from os.path import isdir, join as joinpath
from os import environ as env
systemdir = None
bindir = None
diskdir = None
scriptdir = None
def load_defaults():
global systemdir, bindir, diskdir, scriptdir
if not systemdir:
try:
path = env['M5_PATH'].split(':')
except KeyError:
path = [ '/dist/m5/system' ]
for systemdir in path:
if os.path.isdir(systemdir):
break
else:
raise ImportError, "Can't find a path to system files."
if not bindir:
bindir = joinpath(systemdir, 'binaries')
if not diskdir:
diskdir = joinpath(systemdir, 'disks')
if not scriptdir:
scriptdir = joinpath(systemdir, 'boot')
def disk(file):
load_defaults()
return joinpath(diskdir, file)
def binary(file):
load_defaults()
return joinpath(bindir, file)
def script(file):
load_defaults()
return joinpath(scriptdir, file)
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