SysPaths.py (10759:37fd40f8300f) SysPaths.py (12233:53cf2e32cb59)
1# Copyright (c) 2006 The Regents of The University of Michigan
2# All rights reserved.
3#
4# Redistribution and use in source and binary forms, with or without
5# modification, are permitted provided that the following conditions are
6# met: redistributions of source code must retain the above copyright
7# notice, this list of conditions and the following disclaimer;
8# redistributions in binary form must reproduce the above copyright

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22# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26#
27# Authors: Ali Saidi
28
29import os, sys
1# Copyright (c) 2006 The Regents of The University of Michigan
2# All rights reserved.
3#
4# Redistribution and use in source and binary forms, with or without
5# modification, are permitted provided that the following conditions are
6# met: redistributions of source code must retain the above copyright
7# notice, this list of conditions and the following disclaimer;
8# redistributions in binary form must reproduce the above copyright

--- 13 unchanged lines hidden (view full) ---

22# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26#
27# Authors: Ali Saidi
28
29import os, sys
30from os.path import join as joinpath
31from os import environ as env
32
33config_path = os.path.dirname(os.path.abspath(__file__))
34config_root = os.path.dirname(config_path)
35
30
31config_path = os.path.dirname(os.path.abspath(__file__))
32config_root = os.path.dirname(config_path)
33
36def searchpath(path, filename):
37 for p in path:
38 f = joinpath(p, filename)
39 if os.path.exists(f):
40 return f
41 raise IOError, "Can't find file '%s' on path." % filename
34class PathSearchFunc(object):
35 _sys_paths = None
42
36
43def disk(filename):
44 system()
45 return searchpath(disk.path, filename)
37 def __init__(self, *subdirs):
38 self._subdir = os.path.join(*subdirs)
46
39
47def binary(filename):
48 system()
49 return searchpath(binary.path, filename)
40 def __call__(self, filename):
41 if self._sys_paths is None:
42 try:
43 paths = os.environ['M5_PATH'].split(':')
44 except KeyError:
45 paths = [ '/dist/m5/system', '/n/poolfs/z/dist/m5/system' ]
50
46
51def script(filename):
52 system()
53 return searchpath(script.path, filename)
47 # expand '~' and '~user' in paths
48 paths = map(os.path.expanduser, paths)
54
49
55def system():
56 if not system.path:
57 try:
58 path = env['M5_PATH'].split(':')
59 except KeyError:
60 path = [ '/dist/m5/system', '/n/poolfs/z/dist/m5/system' ]
50 # filter out non-existent directories
51 paths = filter(os.path.isdir, paths)
61
52
62 # expand '~' and '~user' in paths
63 path = map(os.path.expanduser, path)
53 if not paths:
54 raise IOError, "Can't find a path to system files."
64
55
65 # filter out non-existent directories
66 system.path = filter(os.path.isdir, path)
56 self._sys_paths = paths
67
57
68 if not system.path:
69 raise IOError, "Can't find a path to system files."
58 filepath = os.path.join(self._subdir, filename)
59 paths = (os.path.join(p, filepath) for p in self._sys_paths)
60 try:
61 return next(p for p in paths if os.path.exists(p))
62 except StopIteration:
63 raise IOError, "Can't find file '%s' on path." % filename
70
64
71 if not binary.path:
72 binary.path = [joinpath(p, 'binaries') for p in system.path]
73 if not disk.path:
74 disk.path = [joinpath(p, 'disks') for p in system.path]
75 if not script.path:
76 script.path = [joinpath(config_root, 'boot')]
77
78system.path = None
79binary.path = None
80disk.path = None
81script.path = None
65disk = PathSearchFunc('disks')
66binary = PathSearchFunc('binaries')
67script = PathSearchFunc('boot')