| 1 | """distutils.util
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| 2 |
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| 3 | Miscellaneous utility functions -- anything that doesn't fit into
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| 4 | one of the other *util.py modules.
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| 5 | """
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| 6 |
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| 7 | __revision__ = "$Id: util.py 46157 2006-05-23 21:54:23Z tim.peters $"
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| 8 |
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| 9 | import sys, os, string, re
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| 10 | from distutils.errors import DistutilsPlatformError
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| 11 | from distutils.dep_util import newer
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| 12 | from distutils.spawn import spawn
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| 13 | from distutils import log
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| 14 |
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| 15 | def get_platform ():
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| 16 | """Return a string that identifies the current platform. This is used
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| 17 | mainly to distinguish platform-specific build directories and
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| 18 | platform-specific built distributions. Typically includes the OS name
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| 19 | and version and the architecture (as supplied by 'os.uname()'),
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| 20 | although the exact information included depends on the OS; eg. for IRIX
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| 21 | the architecture isn't particularly important (IRIX only runs on SGI
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| 22 | hardware), but for Linux the kernel version isn't particularly
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| 23 | important.
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| 24 |
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| 25 | Examples of returned values:
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| 26 | linux-i586
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| 27 | linux-alpha (?)
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| 28 | solaris-2.6-sun4u
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| 29 | irix-5.3
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| 30 | irix64-6.2
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| 31 |
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| 32 | For non-POSIX platforms, currently just returns 'sys.platform'.
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| 33 | """
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| 34 | if os.name != "posix" or not hasattr(os, 'uname'):
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| 35 | # XXX what about the architecture? NT is Intel or Alpha,
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| 36 | # Mac OS is M68k or PPC, etc.
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| 37 | return sys.platform
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| 38 |
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| 39 | # Try to distinguish various flavours of Unix
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| 40 |
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| 41 | (osname, host, release, version, machine) = os.uname()
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| 42 |
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| 43 | # Convert the OS name to lowercase, remove '/' characters
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| 44 | # (to accommodate BSD/OS), and translate spaces (for "Power Macintosh")
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| 45 | osname = string.lower(osname)
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| 46 | osname = string.replace(osname, '/', '')
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| 47 | machine = string.replace(machine, ' ', '_')
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| 48 | machine = string.replace(machine, '/', '-')
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| 49 |
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| 50 | if osname[:5] == "linux":
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| 51 | # At least on Linux/Intel, 'machine' is the processor --
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| 52 | # i386, etc.
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| 53 | # XXX what about Alpha, SPARC, etc?
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| 54 | return "%s-%s" % (osname, machine)
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| 55 | elif osname[:5] == "sunos":
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| 56 | if release[0] >= "5": # SunOS 5 == Solaris 2
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| 57 | osname = "solaris"
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| 58 | release = "%d.%s" % (int(release[0]) - 3, release[2:])
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| 59 | # fall through to standard osname-release-machine representation
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| 60 | elif osname[:4] == "irix": # could be "irix64"!
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| 61 | return "%s-%s" % (osname, release)
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| 62 | elif osname[:3] == "aix":
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| 63 | return "%s-%s.%s" % (osname, version, release)
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| 64 | elif osname[:6] == "cygwin":
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| 65 | osname = "cygwin"
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| 66 | rel_re = re.compile (r'[\d.]+')
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| 67 | m = rel_re.match(release)
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| 68 | if m:
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| 69 | release = m.group()
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| 70 | elif osname[:6] == "darwin":
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| 71 | #
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| 72 | # For our purposes, we'll assume that the system version from
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| 73 | # distutils' perspective is what MACOSX_DEPLOYMENT_TARGET is set
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| 74 | # to. This makes the compatibility story a bit more sane because the
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| 75 | # machine is going to compile and link as if it were
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| 76 | # MACOSX_DEPLOYMENT_TARGET.
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| 77 | from distutils.sysconfig import get_config_vars
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| 78 | cfgvars = get_config_vars()
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| 79 |
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| 80 | macver = os.environ.get('MACOSX_DEPLOYMENT_TARGET')
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| 81 | if not macver:
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| 82 | macver = cfgvars.get('MACOSX_DEPLOYMENT_TARGET')
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| 83 |
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| 84 | if not macver:
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| 85 | # Get the system version. Reading this plist is a documented
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| 86 | # way to get the system version (see the documentation for
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| 87 | # the Gestalt Manager)
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| 88 | try:
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| 89 | f = open('/System/Library/CoreServices/SystemVersion.plist')
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| 90 | except IOError:
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| 91 | # We're on a plain darwin box, fall back to the default
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| 92 | # behaviour.
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| 93 | pass
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| 94 | else:
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| 95 | m = re.search(
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| 96 | r'<key>ProductUserVisibleVersion</key>\s*' +
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| 97 | r'<string>(.*?)</string>', f.read())
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| 98 | f.close()
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| 99 | if m is not None:
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| 100 | macver = '.'.join(m.group(1).split('.')[:2])
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| 101 | # else: fall back to the default behaviour
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| 102 |
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| 103 | if macver:
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| 104 | from distutils.sysconfig import get_config_vars
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| 105 | release = macver
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| 106 | osname = "macosx"
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| 107 |
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| 108 |
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| 109 | if (release + '.') < '10.4.' and \
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| 110 | get_config_vars().get('UNIVERSALSDK', '').strip():
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| 111 | # The universal build will build fat binaries, but not on
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| 112 | # systems before 10.4
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| 113 | machine = 'fat'
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| 114 |
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| 115 | elif machine in ('PowerPC', 'Power_Macintosh'):
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| 116 | # Pick a sane name for the PPC architecture.
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| 117 | machine = 'ppc'
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| 118 |
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| 119 | return "%s-%s-%s" % (osname, release, machine)
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| 120 |
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| 121 | # get_platform ()
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| 122 |
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| 123 |
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| 124 | def convert_path (pathname):
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| 125 | """Return 'pathname' as a name that will work on the native filesystem,
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| 126 | i.e. split it on '/' and put it back together again using the current
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| 127 | directory separator. Needed because filenames in the setup script are
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| 128 | always supplied in Unix style, and have to be converted to the local
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| 129 | convention before we can actually use them in the filesystem. Raises
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| 130 | ValueError on non-Unix-ish systems if 'pathname' either starts or
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| 131 | ends with a slash.
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| 132 | """
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| 133 | if os.sep == '/':
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| 134 | return pathname
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| 135 | if not pathname:
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| 136 | return pathname
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| 137 | if pathname[0] == '/':
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| 138 | raise ValueError, "path '%s' cannot be absolute" % pathname
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| 139 | if pathname[-1] == '/':
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| 140 | raise ValueError, "path '%s' cannot end with '/'" % pathname
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| 141 |
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| 142 | paths = string.split(pathname, '/')
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| 143 | while '.' in paths:
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| 144 | paths.remove('.')
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| 145 | if not paths:
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| 146 | return os.curdir
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| 147 | return apply(os.path.join, paths)
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| 148 |
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| 149 | # convert_path ()
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| 150 |
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| 151 |
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| 152 | def change_root (new_root, pathname):
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| 153 | """Return 'pathname' with 'new_root' prepended. If 'pathname' is
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| 154 | relative, this is equivalent to "os.path.join(new_root,pathname)".
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| 155 | Otherwise, it requires making 'pathname' relative and then joining the
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| 156 | two, which is tricky on DOS/Windows and Mac OS.
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| 157 | """
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| 158 | if os.name == 'posix':
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| 159 | if not os.path.isabs(pathname):
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| 160 | return os.path.join(new_root, pathname)
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| 161 | else:
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| 162 | return os.path.join(new_root, pathname[1:])
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| 163 |
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| 164 | elif os.name == 'nt':
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| 165 | (drive, path) = os.path.splitdrive(pathname)
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| 166 | if path[0] == '\\':
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| 167 | path = path[1:]
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| 168 | return os.path.join(new_root, path)
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| 169 |
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| 170 | elif os.name == 'os2':
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| 171 | (drive, path) = os.path.splitdrive(pathname)
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| 172 | if path[0] == os.sep:
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| 173 | path = path[1:]
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| 174 | return os.path.join(new_root, path)
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| 175 |
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| 176 | elif os.name == 'mac':
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| 177 | if not os.path.isabs(pathname):
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| 178 | return os.path.join(new_root, pathname)
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| 179 | else:
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| 180 | # Chop off volume name from start of path
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| 181 | elements = string.split(pathname, ":", 1)
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| 182 | pathname = ":" + elements[1]
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| 183 | return os.path.join(new_root, pathname)
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| 184 |
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| 185 | else:
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| 186 | raise DistutilsPlatformError, \
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| 187 | "nothing known about platform '%s'" % os.name
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| 188 |
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| 189 |
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| 190 | _environ_checked = 0
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| 191 | def check_environ ():
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| 192 | """Ensure that 'os.environ' has all the environment variables we
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| 193 | guarantee that users can use in config files, command-line options,
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| 194 | etc. Currently this includes:
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| 195 | HOME - user's home directory (Unix only)
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| 196 | PLAT - description of the current platform, including hardware
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| 197 | and OS (see 'get_platform()')
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| 198 | """
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| 199 | global _environ_checked
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| 200 | if _environ_checked:
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| 201 | return
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| 202 |
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| 203 | if os.name == 'posix' and not os.environ.has_key('HOME'):
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| 204 | import pwd
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| 205 | os.environ['HOME'] = pwd.getpwuid(os.getuid())[5]
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| 206 |
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| 207 | if not os.environ.has_key('PLAT'):
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| 208 | os.environ['PLAT'] = get_platform()
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| 209 |
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| 210 | _environ_checked = 1
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| 211 |
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| 212 |
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| 213 | def subst_vars (s, local_vars):
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| 214 | """Perform shell/Perl-style variable substitution on 'string'. Every
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| 215 | occurrence of '$' followed by a name is considered a variable, and
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| 216 | variable is substituted by the value found in the 'local_vars'
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| 217 | dictionary, or in 'os.environ' if it's not in 'local_vars'.
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| 218 | 'os.environ' is first checked/augmented to guarantee that it contains
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| 219 | certain values: see 'check_environ()'. Raise ValueError for any
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| 220 | variables not found in either 'local_vars' or 'os.environ'.
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| 221 | """
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| 222 | check_environ()
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| 223 | def _subst (match, local_vars=local_vars):
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| 224 | var_name = match.group(1)
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| 225 | if local_vars.has_key(var_name):
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| 226 | return str(local_vars[var_name])
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| 227 | else:
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| 228 | return os.environ[var_name]
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| 229 |
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| 230 | try:
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| 231 | return re.sub(r'\$([a-zA-Z_][a-zA-Z_0-9]*)', _subst, s)
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| 232 | except KeyError, var:
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| 233 | raise ValueError, "invalid variable '$%s'" % var
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| 234 |
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| 235 | # subst_vars ()
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| 236 |
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| 237 |
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| 238 | def grok_environment_error (exc, prefix="error: "):
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| 239 | """Generate a useful error message from an EnvironmentError (IOError or
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| 240 | OSError) exception object. Handles Python 1.5.1 and 1.5.2 styles, and
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| 241 | does what it can to deal with exception objects that don't have a
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| 242 | filename (which happens when the error is due to a two-file operation,
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| 243 | such as 'rename()' or 'link()'. Returns the error message as a string
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| 244 | prefixed with 'prefix'.
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| 245 | """
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| 246 | # check for Python 1.5.2-style {IO,OS}Error exception objects
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| 247 | if hasattr(exc, 'filename') and hasattr(exc, 'strerror'):
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| 248 | if exc.filename:
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| 249 | error = prefix + "%s: %s" % (exc.filename, exc.strerror)
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| 250 | else:
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| 251 | # two-argument functions in posix module don't
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| 252 | # include the filename in the exception object!
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| 253 | error = prefix + "%s" % exc.strerror
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| 254 | else:
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| 255 | error = prefix + str(exc[-1])
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| 256 |
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| 257 | return error
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| 258 |
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| 259 |
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| 260 | # Needed by 'split_quoted()'
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| 261 | _wordchars_re = _squote_re = _dquote_re = None
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| 262 | def _init_regex():
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| 263 | global _wordchars_re, _squote_re, _dquote_re
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| 264 | _wordchars_re = re.compile(r'[^\\\'\"%s ]*' % string.whitespace)
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| 265 | _squote_re = re.compile(r"'(?:[^'\\]|\\.)*'")
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| 266 | _dquote_re = re.compile(r'"(?:[^"\\]|\\.)*"')
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| 267 |
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| 268 | def split_quoted (s):
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| 269 | """Split a string up according to Unix shell-like rules for quotes and
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| 270 | backslashes. In short: words are delimited by spaces, as long as those
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| 271 | spaces are not escaped by a backslash, or inside a quoted string.
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| 272 | Single and double quotes are equivalent, and the quote characters can
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| 273 | be backslash-escaped. The backslash is stripped from any two-character
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| 274 | escape sequence, leaving only the escaped character. The quote
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| 275 | characters are stripped from any quoted string. Returns a list of
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| 276 | words.
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| 277 | """
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| 278 |
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| 279 | # This is a nice algorithm for splitting up a single string, since it
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| 280 | # doesn't require character-by-character examination. It was a little
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| 281 | # bit of a brain-bender to get it working right, though...
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| 282 | if _wordchars_re is None: _init_regex()
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| 283 |
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| 284 | s = string.strip(s)
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| 285 | words = []
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| 286 | pos = 0
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| 287 |
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| 288 | while s:
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| 289 | m = _wordchars_re.match(s, pos)
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| 290 | end = m.end()
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| 291 | if end == len(s):
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| 292 | words.append(s[:end])
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| 293 | break
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| 294 |
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| 295 | if s[end] in string.whitespace: # unescaped, unquoted whitespace: now
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| 296 | words.append(s[:end]) # we definitely have a word delimiter
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| 297 | s = string.lstrip(s[end:])
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| 298 | pos = 0
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| 299 |
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| 300 | elif s[end] == '\\': # preserve whatever is being escaped;
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| 301 | # will become part of the current word
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| 302 | s = s[:end] + s[end+1:]
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| 303 | pos = end+1
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| 304 |
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| 305 | else:
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| 306 | if s[end] == "'": # slurp singly-quoted string
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| 307 | m = _squote_re.match(s, end)
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| 308 | elif s[end] == '"': # slurp doubly-quoted string
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| 309 | m = _dquote_re.match(s, end)
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| 310 | else:
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| 311 | raise RuntimeError, \
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| 312 | "this can't happen (bad char '%c')" % s[end]
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| 313 |
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| 314 | if m is None:
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| 315 | raise ValueError, \
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| 316 | "bad string (mismatched %s quotes?)" % s[end]
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| 317 |
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| 318 | (beg, end) = m.span()
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| 319 | s = s[:beg] + s[beg+1:end-1] + s[end:]
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| 320 | pos = m.end() - 2
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| 321 |
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| 322 | if pos >= len(s):
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| 323 | words.append(s)
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| 324 | break
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| 325 |
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| 326 | return words
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| 327 |
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| 328 | # split_quoted ()
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| 329 |
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| 330 |
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| 331 | def execute (func, args, msg=None, verbose=0, dry_run=0):
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| 332 | """Perform some action that affects the outside world (eg. by
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| 333 | writing to the filesystem). Such actions are special because they
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| 334 | are disabled by the 'dry_run' flag. This method takes care of all
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| 335 | that bureaucracy for you; all you have to do is supply the
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| 336 | function to call and an argument tuple for it (to embody the
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| 337 | "external action" being performed), and an optional message to
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| 338 | print.
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| 339 | """
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| 340 | if msg is None:
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| 341 | msg = "%s%r" % (func.__name__, args)
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| 342 | if msg[-2:] == ',)': # correct for singleton tuple
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| 343 | msg = msg[0:-2] + ')'
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| 344 |
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| 345 | log.info(msg)
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| 346 | if not dry_run:
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| 347 | apply(func, args)
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| 348 |
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| 349 |
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| 350 | def strtobool (val):
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| 351 | """Convert a string representation of truth to true (1) or false (0).
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| 352 |
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| 353 | True values are 'y', 'yes', 't', 'true', 'on', and '1'; false values
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| 354 | are 'n', 'no', 'f', 'false', 'off', and '0'. Raises ValueError if
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| 355 | 'val' is anything else.
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| 356 | """
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| 357 | val = string.lower(val)
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| 358 | if val in ('y', 'yes', 't', 'true', 'on', '1'):
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| 359 | return 1
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| 360 | elif val in ('n', 'no', 'f', 'false', 'off', '0'):
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| 361 | return 0
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| 362 | else:
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| 363 | raise ValueError, "invalid truth value %r" % (val,)
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| 364 |
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| 365 |
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| 366 | def byte_compile (py_files,
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| 367 | optimize=0, force=0,
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| 368 | prefix=None, base_dir=None,
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| 369 | verbose=1, dry_run=0,
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| 370 | direct=None):
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| 371 | """Byte-compile a collection of Python source files to either .pyc
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| 372 | or .pyo files in the same directory. 'py_files' is a list of files
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| 373 | to compile; any files that don't end in ".py" are silently skipped.
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| 374 | 'optimize' must be one of the following:
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| 375 | 0 - don't optimize (generate .pyc)
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| 376 | 1 - normal optimization (like "python -O")
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| 377 | 2 - extra optimization (like "python -OO")
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| 378 | If 'force' is true, all files are recompiled regardless of
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| 379 | timestamps.
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| 380 |
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| 381 | The source filename encoded in each bytecode file defaults to the
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| 382 | filenames listed in 'py_files'; you can modify these with 'prefix' and
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| 383 | 'basedir'. 'prefix' is a string that will be stripped off of each
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| 384 | source filename, and 'base_dir' is a directory name that will be
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| 385 | prepended (after 'prefix' is stripped). You can supply either or both
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| 386 | (or neither) of 'prefix' and 'base_dir', as you wish.
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| 387 |
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| 388 | If 'dry_run' is true, doesn't actually do anything that would
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| 389 | affect the filesystem.
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| 390 |
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| 391 | Byte-compilation is either done directly in this interpreter process
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| 392 | with the standard py_compile module, or indirectly by writing a
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| 393 | temporary script and executing it. Normally, you should let
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| 394 | 'byte_compile()' figure out to use direct compilation or not (see
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| 395 | the source for details). The 'direct' flag is used by the script
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| 396 | generated in indirect mode; unless you know what you're doing, leave
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| 397 | it set to None.
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| 398 | """
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| 399 |
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| 400 | # First, if the caller didn't force us into direct or indirect mode,
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| 401 | # figure out which mode we should be in. We take a conservative
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| 402 | # approach: choose direct mode *only* if the current interpreter is
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| 403 | # in debug mode and optimize is 0. If we're not in debug mode (-O
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| 404 | # or -OO), we don't know which level of optimization this
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| 405 | # interpreter is running with, so we can't do direct
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| 406 | # byte-compilation and be certain that it's the right thing. Thus,
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| 407 | # always compile indirectly if the current interpreter is in either
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| 408 | # optimize mode, or if either optimization level was requested by
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| 409 | # the caller.
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| 410 | if direct is None:
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| 411 | direct = (__debug__ and optimize == 0)
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| 412 |
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| 413 | # "Indirect" byte-compilation: write a temporary script and then
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| 414 | # run it with the appropriate flags.
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| 415 | if not direct:
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| 416 | try:
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| 417 | from tempfile import mkstemp
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| 418 | (script_fd, script_name) = mkstemp(".py")
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| 419 | except ImportError:
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| 420 | from tempfile import mktemp
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| 421 | (script_fd, script_name) = None, mktemp(".py")
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| 422 | log.info("writing byte-compilation script '%s'", script_name)
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| 423 | if not dry_run:
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| 424 | if script_fd is not None:
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| 425 | script = os.fdopen(script_fd, "w")
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| 426 | else:
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| 427 | script = open(script_name, "w")
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| 428 |
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| 429 | script.write("""\
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| 430 | from distutils.util import byte_compile
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| 431 | files = [
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| 432 | """)
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| 433 |
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| 434 | # XXX would be nice to write absolute filenames, just for
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| 435 | # safety's sake (script should be more robust in the face of
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| 436 | # chdir'ing before running it). But this requires abspath'ing
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| 437 | # 'prefix' as well, and that breaks the hack in build_lib's
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| 438 | # 'byte_compile()' method that carefully tacks on a trailing
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| 439 | # slash (os.sep really) to make sure the prefix here is "just
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| 440 | # right". This whole prefix business is rather delicate -- the
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| 441 | # problem is that it's really a directory, but I'm treating it
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| 442 | # as a dumb string, so trailing slashes and so forth matter.
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| 443 |
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| 444 | #py_files = map(os.path.abspath, py_files)
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| 445 | #if prefix:
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| 446 | # prefix = os.path.abspath(prefix)
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| 447 |
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| 448 | script.write(string.join(map(repr, py_files), ",\n") + "]\n")
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| 449 | script.write("""
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| 450 | byte_compile(files, optimize=%r, force=%r,
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| 451 | prefix=%r, base_dir=%r,
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| 452 | verbose=%r, dry_run=0,
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| 453 | direct=1)
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| 454 | """ % (optimize, force, prefix, base_dir, verbose))
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| 455 |
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| 456 | script.close()
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| 457 |
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| 458 | cmd = [sys.executable, script_name]
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| 459 | if optimize == 1:
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| 460 | cmd.insert(1, "-O")
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| 461 | elif optimize == 2:
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| 462 | cmd.insert(1, "-OO")
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| 463 | spawn(cmd, dry_run=dry_run)
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| 464 | execute(os.remove, (script_name,), "removing %s" % script_name,
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| 465 | dry_run=dry_run)
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| 466 |
|
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| 467 | # "Direct" byte-compilation: use the py_compile module to compile
|
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| 468 | # right here, right now. Note that the script generated in indirect
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| 469 | # mode simply calls 'byte_compile()' in direct mode, a weird sort of
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| 470 | # cross-process recursion. Hey, it works!
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| 471 | else:
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| 472 | from py_compile import compile
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| 473 |
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| 474 | for file in py_files:
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| 475 | if file[-3:] != ".py":
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| 476 | # This lets us be lazy and not filter filenames in
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| 477 | # the "install_lib" command.
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|---|
| 478 | continue
|
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| 479 |
|
|---|
| 480 | # Terminology from the py_compile module:
|
|---|
| 481 | # cfile - byte-compiled file
|
|---|
| 482 | # dfile - purported source filename (same as 'file' by default)
|
|---|
| 483 | cfile = file + (__debug__ and "c" or "o")
|
|---|
| 484 | dfile = file
|
|---|
| 485 | if prefix:
|
|---|
| 486 | if file[:len(prefix)] != prefix:
|
|---|
| 487 | raise ValueError, \
|
|---|
| 488 | ("invalid prefix: filename %r doesn't start with %r"
|
|---|
| 489 | % (file, prefix))
|
|---|
| 490 | dfile = dfile[len(prefix):]
|
|---|
| 491 | if base_dir:
|
|---|
| 492 | dfile = os.path.join(base_dir, dfile)
|
|---|
| 493 |
|
|---|
| 494 | cfile_base = os.path.basename(cfile)
|
|---|
| 495 | if direct:
|
|---|
| 496 | if force or newer(file, cfile):
|
|---|
| 497 | log.info("byte-compiling %s to %s", file, cfile_base)
|
|---|
| 498 | if not dry_run:
|
|---|
| 499 | compile(file, cfile, dfile)
|
|---|
| 500 | else:
|
|---|
| 501 | log.debug("skipping byte-compilation of %s to %s",
|
|---|
| 502 | file, cfile_base)
|
|---|
| 503 |
|
|---|
| 504 | # byte_compile ()
|
|---|
| 505 |
|
|---|
| 506 | def rfc822_escape (header):
|
|---|
| 507 | """Return a version of the string escaped for inclusion in an
|
|---|
| 508 | RFC-822 header, by ensuring there are 8 spaces space after each newline.
|
|---|
| 509 | """
|
|---|
| 510 | lines = string.split(header, '\n')
|
|---|
| 511 | lines = map(string.strip, lines)
|
|---|
| 512 | header = string.join(lines, '\n' + 8*' ')
|
|---|
| 513 | return header
|
|---|
