609 lines
22 KiB
Python
609 lines
22 KiB
Python
"""distutils.util
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Miscellaneous utility functions -- anything that doesn't fit into
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one of the other *util.py modules.
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"""
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__revision__ = "$Id$"
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import sys, os, string, re
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from distutils.errors import DistutilsPlatformError
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from distutils.dep_util import newer
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from distutils.spawn import spawn, find_executable
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from distutils import log
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from distutils.version import LooseVersion
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def get_platform():
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"""Return a string that identifies the current platform.
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This is used mainly to distinguish platform-specific build directories and
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platform-specific built distributions. Typically includes the OS name
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and version and the architecture (as supplied by 'os.uname()'),
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although the exact information included depends on the OS; eg. for IRIX
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the architecture isn't particularly important (IRIX only runs on SGI
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hardware), but for Linux the kernel version isn't particularly
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important.
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Examples of returned values:
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linux-i586
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linux-alpha (?)
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solaris-2.6-sun4u
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irix-5.3
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irix64-6.2
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Windows will return one of:
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win-amd64 (64bit Windows on AMD64 (aka x86_64, Intel64, EM64T, etc)
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win-ia64 (64bit Windows on Itanium)
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win32 (all others - specifically, sys.platform is returned)
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For other non-POSIX platforms, currently just returns 'sys.platform'.
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"""
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if os.name == 'nt':
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# sniff sys.version for architecture.
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prefix = " bit ("
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i = sys.version.find(prefix)
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if i == -1:
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return sys.platform
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j = sys.version.find(")", i)
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look = sys.version[i+len(prefix):j].lower()
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if look == 'amd64':
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return 'win-amd64'
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if look == 'itanium':
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return 'win-ia64'
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return sys.platform
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if os.name != "posix" or not hasattr(os, 'uname'):
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# XXX what about the architecture? NT is Intel or Alpha,
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# Mac OS is M68k or PPC, etc.
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return sys.platform
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# Try to distinguish various flavours of Unix
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(osname, host, release, version, machine) = os.uname()
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# Convert the OS name to lowercase, remove '/' characters
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# (to accommodate BSD/OS), and translate spaces (for "Power Macintosh")
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osname = osname.lower().replace('/', '')
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machine = machine.replace(' ', '_')
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machine = machine.replace('/', '-')
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if osname[:5] == "linux":
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# At least on Linux/Intel, 'machine' is the processor --
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# i386, etc.
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# XXX what about Alpha, SPARC, etc?
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return "%s-%s" % (osname, machine)
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elif osname[:5] == "sunos":
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if release[0] >= "5": # SunOS 5 == Solaris 2
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osname = "solaris"
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release = "%d.%s" % (int(release[0]) - 3, release[2:])
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# fall through to standard osname-release-machine representation
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elif osname[:4] == "irix": # could be "irix64"!
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return "%s-%s" % (osname, release)
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elif osname[:3] == "aix":
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return "%s-%s.%s" % (osname, version, release)
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elif osname[:6] == "cygwin":
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osname = "cygwin"
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rel_re = re.compile (r'[\d.]+')
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m = rel_re.match(release)
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if m:
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release = m.group()
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elif osname[:6] == "darwin":
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#
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# For our purposes, we'll assume that the system version from
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# distutils' perspective is what MACOSX_DEPLOYMENT_TARGET is set
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# to. This makes the compatibility story a bit more sane because the
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# machine is going to compile and link as if it were
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# MACOSX_DEPLOYMENT_TARGET.
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from distutils.sysconfig import get_config_vars
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cfgvars = get_config_vars()
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macver = os.environ.get('MACOSX_DEPLOYMENT_TARGET')
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if not macver:
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macver = cfgvars.get('MACOSX_DEPLOYMENT_TARGET')
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if 1:
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# Always calculate the release of the running machine,
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# needed to determine if we can build fat binaries or not.
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macrelease = macver
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# Get the system version. Reading this plist is a documented
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# way to get the system version (see the documentation for
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# the Gestalt Manager)
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try:
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f = open('/System/Library/CoreServices/SystemVersion.plist')
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except IOError:
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# We're on a plain darwin box, fall back to the default
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# behaviour.
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pass
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else:
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m = re.search(
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r'<key>ProductUserVisibleVersion</key>\s*' +
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r'<string>(.*?)</string>', f.read())
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f.close()
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if m is not None:
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macrelease = '.'.join(m.group(1).split('.')[:2])
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# else: fall back to the default behaviour
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if not macver:
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macver = macrelease
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if macver:
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from distutils.sysconfig import get_config_vars
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release = macver
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osname = "macosx"
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if (macrelease + '.') >= '10.4.' and \
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'-arch' in get_config_vars().get('CFLAGS', '').strip():
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# The universal build will build fat binaries, but not on
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# systems before 10.4
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#
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# Try to detect 4-way universal builds, those have machine-type
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# 'universal' instead of 'fat'.
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machine = 'fat'
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cflags = get_config_vars().get('CFLAGS')
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archs = re.findall('-arch\s+(\S+)', cflags)
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archs.sort()
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archs = tuple(archs)
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if len(archs) == 1:
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machine = archs[0]
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elif archs == ('i386', 'ppc'):
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machine = 'fat'
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elif archs == ('i386', 'x86_64'):
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machine = 'intel'
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elif archs == ('i386', 'ppc', 'x86_64'):
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machine = 'fat3'
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elif archs == ('ppc64', 'x86_64'):
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machine = 'fat64'
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elif archs == ('i386', 'ppc', 'ppc64', 'x86_64'):
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machine = 'universal'
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else:
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raise ValueError(
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"Don't know machine value for archs=%r"%(archs,))
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elif machine in ('PowerPC', 'Power_Macintosh'):
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# Pick a sane name for the PPC architecture.
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machine = 'ppc'
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return "%s-%s-%s" % (osname, release, machine)
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def convert_path(pathname):
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"""Return 'pathname' as a name that will work on the native filesystem.
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i.e. split it on '/' and put it back together again using the current
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directory separator. Needed because filenames in the setup script are
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always supplied in Unix style, and have to be converted to the local
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convention before we can actually use them in the filesystem. Raises
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ValueError on non-Unix-ish systems if 'pathname' either starts or
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ends with a slash.
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"""
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if os.sep == '/':
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return pathname
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if not pathname:
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return pathname
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if pathname[0] == '/':
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raise ValueError("path '%s' cannot be absolute" % pathname)
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if pathname[-1] == '/':
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raise ValueError("path '%s' cannot end with '/'" % pathname)
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paths = pathname.split('/')
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while '.' in paths:
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paths.remove('.')
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if not paths:
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return os.curdir
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return os.path.join(*paths)
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def change_root(new_root, pathname):
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"""Return 'pathname' with 'new_root' prepended.
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If 'pathname' is relative, this is equivalent to
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"os.path.join(new_root,pathname)".
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Otherwise, it requires making 'pathname' relative and then joining the
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two, which is tricky on DOS/Windows and Mac OS.
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"""
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if os.name == 'posix':
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if not os.path.isabs(pathname):
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return os.path.join(new_root, pathname)
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else:
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return os.path.join(new_root, pathname[1:])
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elif os.name == 'nt':
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(drive, path) = os.path.splitdrive(pathname)
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if path[0] == '\\':
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path = path[1:]
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return os.path.join(new_root, path)
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elif os.name == 'os2':
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(drive, path) = os.path.splitdrive(pathname)
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if path[0] == os.sep:
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path = path[1:]
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return os.path.join(new_root, path)
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elif os.name == 'mac':
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if not os.path.isabs(pathname):
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return os.path.join(new_root, pathname)
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else:
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# Chop off volume name from start of path
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elements = pathname.split(":", 1)
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pathname = ":" + elements[1]
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return os.path.join(new_root, pathname)
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else:
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raise DistutilsPlatformError("nothing known about "
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"platform '%s'" % os.name)
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_environ_checked = 0
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def check_environ():
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"""Ensure that 'os.environ' has all the environment variables needed.
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We guarantee that users can use in config files, command-line options,
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etc. Currently this includes:
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HOME - user's home directory (Unix only)
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PLAT - description of the current platform, including hardware
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and OS (see 'get_platform()')
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"""
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global _environ_checked
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if _environ_checked:
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return
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if os.name == 'posix' and 'HOME' not in os.environ:
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import pwd
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os.environ['HOME'] = pwd.getpwuid(os.getuid())[5]
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if 'PLAT' not in os.environ:
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os.environ['PLAT'] = get_platform()
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_environ_checked = 1
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def subst_vars(s, local_vars):
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"""Perform shell/Perl-style variable substitution on 'string'.
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Every occurrence of '$' followed by a name is considered a variable, and
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variable is substituted by the value found in the 'local_vars'
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dictionary, or in 'os.environ' if it's not in 'local_vars'.
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'os.environ' is first checked/augmented to guarantee that it contains
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certain values: see 'check_environ()'. Raise ValueError for any
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variables not found in either 'local_vars' or 'os.environ'.
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"""
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check_environ()
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def _subst (match, local_vars=local_vars):
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var_name = match.group(1)
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if var_name in local_vars:
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return str(local_vars[var_name])
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else:
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return os.environ[var_name]
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try:
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return re.sub(r'\$([a-zA-Z_][a-zA-Z_0-9]*)', _subst, s)
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except KeyError, var:
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raise ValueError("invalid variable '$%s'" % var)
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def grok_environment_error(exc, prefix="error: "):
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"""Generate a useful error message from an EnvironmentError.
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This will generate an IOError or an OSError exception object.
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Handles Python 1.5.1 and 1.5.2 styles, and
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does what it can to deal with exception objects that don't have a
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filename (which happens when the error is due to a two-file operation,
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such as 'rename()' or 'link()'. Returns the error message as a string
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prefixed with 'prefix'.
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"""
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# check for Python 1.5.2-style {IO,OS}Error exception objects
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if hasattr(exc, 'filename') and hasattr(exc, 'strerror'):
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if exc.filename:
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error = prefix + "%s: %s" % (exc.filename, exc.strerror)
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else:
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# two-argument functions in posix module don't
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# include the filename in the exception object!
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error = prefix + "%s" % exc.strerror
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else:
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error = prefix + str(exc[-1])
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return error
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# Needed by 'split_quoted()'
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_wordchars_re = _squote_re = _dquote_re = None
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def _init_regex():
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global _wordchars_re, _squote_re, _dquote_re
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_wordchars_re = re.compile(r'[^\\\'\"%s ]*' % string.whitespace)
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_squote_re = re.compile(r"'(?:[^'\\]|\\.)*'")
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_dquote_re = re.compile(r'"(?:[^"\\]|\\.)*"')
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def split_quoted(s):
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"""Split a string up according to Unix shell-like rules for quotes and
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backslashes.
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In short: words are delimited by spaces, as long as those
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spaces are not escaped by a backslash, or inside a quoted string.
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Single and double quotes are equivalent, and the quote characters can
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be backslash-escaped. The backslash is stripped from any two-character
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escape sequence, leaving only the escaped character. The quote
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characters are stripped from any quoted string. Returns a list of
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words.
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"""
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# This is a nice algorithm for splitting up a single string, since it
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# doesn't require character-by-character examination. It was a little
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# bit of a brain-bender to get it working right, though...
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if _wordchars_re is None: _init_regex()
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s = s.strip()
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words = []
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pos = 0
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while s:
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m = _wordchars_re.match(s, pos)
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end = m.end()
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if end == len(s):
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words.append(s[:end])
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break
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if s[end] in string.whitespace: # unescaped, unquoted whitespace: now
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words.append(s[:end]) # we definitely have a word delimiter
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s = s[end:].lstrip()
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pos = 0
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elif s[end] == '\\': # preserve whatever is being escaped;
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# will become part of the current word
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s = s[:end] + s[end+1:]
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pos = end+1
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else:
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if s[end] == "'": # slurp singly-quoted string
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m = _squote_re.match(s, end)
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elif s[end] == '"': # slurp doubly-quoted string
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m = _dquote_re.match(s, end)
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else:
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raise RuntimeError("this can't happen "
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"(bad char '%c')" % s[end])
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if m is None:
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raise ValueError("bad string (mismatched %s quotes?)" % s[end])
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(beg, end) = m.span()
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s = s[:beg] + s[beg+1:end-1] + s[end:]
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pos = m.end() - 2
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if pos >= len(s):
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words.append(s)
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break
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return words
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def execute(func, args, msg=None, verbose=0, dry_run=0):
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"""Perform some action that affects the outside world.
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eg. by writing to the filesystem). Such actions are special because
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they are disabled by the 'dry_run' flag. This method takes care of all
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that bureaucracy for you; all you have to do is supply the
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function to call and an argument tuple for it (to embody the
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"external action" being performed), and an optional message to
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print.
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"""
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if msg is None:
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msg = "%s%r" % (func.__name__, args)
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if msg[-2:] == ',)': # correct for singleton tuple
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msg = msg[0:-2] + ')'
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log.info(msg)
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if not dry_run:
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func(*args)
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def strtobool(val):
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"""Convert a string representation of truth to true (1) or false (0).
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True values are 'y', 'yes', 't', 'true', 'on', and '1'; false values
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are 'n', 'no', 'f', 'false', 'off', and '0'. Raises ValueError if
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'val' is anything else.
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"""
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val = val.lower()
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if val in ('y', 'yes', 't', 'true', 'on', '1'):
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return 1
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elif val in ('n', 'no', 'f', 'false', 'off', '0'):
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return 0
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else:
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raise ValueError, "invalid truth value %r" % (val,)
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def byte_compile(py_files, optimize=0, force=0, prefix=None, base_dir=None,
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verbose=1, dry_run=0, direct=None):
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"""Byte-compile a collection of Python source files to either .pyc
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or .pyo files in the same directory.
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'py_files' is a list of files to compile; any files that don't end in
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".py" are silently skipped. 'optimize' must be one of the following:
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0 - don't optimize (generate .pyc)
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1 - normal optimization (like "python -O")
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2 - extra optimization (like "python -OO")
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If 'force' is true, all files are recompiled regardless of
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timestamps.
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The source filename encoded in each bytecode file defaults to the
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filenames listed in 'py_files'; you can modify these with 'prefix' and
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'basedir'. 'prefix' is a string that will be stripped off of each
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source filename, and 'base_dir' is a directory name that will be
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prepended (after 'prefix' is stripped). You can supply either or both
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(or neither) of 'prefix' and 'base_dir', as you wish.
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If 'dry_run' is true, doesn't actually do anything that would
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affect the filesystem.
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Byte-compilation is either done directly in this interpreter process
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with the standard py_compile module, or indirectly by writing a
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temporary script and executing it. Normally, you should let
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'byte_compile()' figure out to use direct compilation or not (see
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the source for details). The 'direct' flag is used by the script
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generated in indirect mode; unless you know what you're doing, leave
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it set to None.
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"""
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# First, if the caller didn't force us into direct or indirect mode,
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# figure out which mode we should be in. We take a conservative
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# approach: choose direct mode *only* if the current interpreter is
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# in debug mode and optimize is 0. If we're not in debug mode (-O
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# or -OO), we don't know which level of optimization this
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# interpreter is running with, so we can't do direct
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# byte-compilation and be certain that it's the right thing. Thus,
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# always compile indirectly if the current interpreter is in either
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# optimize mode, or if either optimization level was requested by
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# the caller.
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if direct is None:
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direct = (__debug__ and optimize == 0)
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# "Indirect" byte-compilation: write a temporary script and then
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# run it with the appropriate flags.
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if not direct:
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try:
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from tempfile import mkstemp
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(script_fd, script_name) = mkstemp(".py")
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except ImportError:
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from tempfile import mktemp
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(script_fd, script_name) = None, mktemp(".py")
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log.info("writing byte-compilation script '%s'", script_name)
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if not dry_run:
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if script_fd is not None:
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script = os.fdopen(script_fd, "w")
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else:
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script = open(script_name, "w")
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script.write("""\
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from distutils.util import byte_compile
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files = [
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""")
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# XXX would be nice to write absolute filenames, just for
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# safety's sake (script should be more robust in the face of
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# chdir'ing before running it). But this requires abspath'ing
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# 'prefix' as well, and that breaks the hack in build_lib's
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# 'byte_compile()' method that carefully tacks on a trailing
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# slash (os.sep really) to make sure the prefix here is "just
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# right". This whole prefix business is rather delicate -- the
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# problem is that it's really a directory, but I'm treating it
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|
# as a dumb string, so trailing slashes and so forth matter.
|
|
|
|
#py_files = map(os.path.abspath, py_files)
|
|
#if prefix:
|
|
# prefix = os.path.abspath(prefix)
|
|
|
|
script.write(",\n".join(map(repr, py_files)) + "]\n")
|
|
script.write("""
|
|
byte_compile(files, optimize=%r, force=%r,
|
|
prefix=%r, base_dir=%r,
|
|
verbose=%r, dry_run=0,
|
|
direct=1)
|
|
""" % (optimize, force, prefix, base_dir, verbose))
|
|
|
|
script.close()
|
|
|
|
cmd = [sys.executable, script_name]
|
|
if optimize == 1:
|
|
cmd.insert(1, "-O")
|
|
elif optimize == 2:
|
|
cmd.insert(1, "-OO")
|
|
spawn(cmd, dry_run=dry_run)
|
|
execute(os.remove, (script_name,), "removing %s" % script_name,
|
|
dry_run=dry_run)
|
|
|
|
# "Direct" byte-compilation: use the py_compile module to compile
|
|
# right here, right now. Note that the script generated in indirect
|
|
# mode simply calls 'byte_compile()' in direct mode, a weird sort of
|
|
# cross-process recursion. Hey, it works!
|
|
else:
|
|
from py_compile import compile
|
|
|
|
for file in py_files:
|
|
if file[-3:] != ".py":
|
|
# This lets us be lazy and not filter filenames in
|
|
# the "install_lib" command.
|
|
continue
|
|
|
|
# Terminology from the py_compile module:
|
|
# cfile - byte-compiled file
|
|
# dfile - purported source filename (same as 'file' by default)
|
|
cfile = file + (__debug__ and "c" or "o")
|
|
dfile = file
|
|
if prefix:
|
|
if file[:len(prefix)] != prefix:
|
|
raise ValueError("invalid prefix: filename %r doesn't "
|
|
"start with %r" % (file, prefix))
|
|
dfile = dfile[len(prefix):]
|
|
if base_dir:
|
|
dfile = os.path.join(base_dir, dfile)
|
|
|
|
cfile_base = os.path.basename(cfile)
|
|
if direct:
|
|
if force or newer(file, cfile):
|
|
log.info("byte-compiling %s to %s", file, cfile_base)
|
|
if not dry_run:
|
|
compile(file, cfile, dfile)
|
|
else:
|
|
log.debug("skipping byte-compilation of %s to %s",
|
|
file, cfile_base)
|
|
|
|
|
|
def rfc822_escape(header):
|
|
"""Return a version of the string escaped for inclusion in an
|
|
RFC-822 header, by ensuring there are 8 spaces space after each newline.
|
|
"""
|
|
lines = [x.strip() for x in header.split('\n')]
|
|
sep = '\n' + 8*' '
|
|
return sep.join(lines)
|
|
|
|
_RE_VERSION = re.compile('(\d+\.\d+(\.\d+)*)')
|
|
_MAC_OS_X_LD_VERSION = re.compile('^@\(#\)PROGRAM:ld PROJECT:ld64-((\d+)(\.\d+)*)')
|
|
|
|
def _find_ld_version():
|
|
"""Finds the ld version. The version scheme differs under Mac OSX."""
|
|
if sys.platform == 'darwin':
|
|
return _find_exe_version('ld -v', _MAC_OS_X_LD_VERSION)
|
|
else:
|
|
return _find_exe_version('ld -v')
|
|
|
|
def _find_exe_version(cmd, pattern=_RE_VERSION):
|
|
"""Find the version of an executable by running `cmd` in the shell.
|
|
|
|
`pattern` is a compiled regular expression. If not provided, default
|
|
to _RE_VERSION. If the command is not found, or the output does not
|
|
match the mattern, returns None.
|
|
"""
|
|
from subprocess import Popen, PIPE
|
|
executable = cmd.split()[0]
|
|
if find_executable(executable) is None:
|
|
return None
|
|
pipe = Popen(cmd, shell=True, stdout=PIPE, stderr=PIPE)
|
|
try:
|
|
stdout, stderr = pipe.stdout.read(), pipe.stderr.read()
|
|
finally:
|
|
pipe.stdout.close()
|
|
pipe.stderr.close()
|
|
# some commands like ld under MacOS X, will give the
|
|
# output in the stderr, rather than stdout.
|
|
if stdout != '':
|
|
out_string = stdout
|
|
else:
|
|
out_string = stderr
|
|
|
|
result = pattern.search(out_string)
|
|
if result is None:
|
|
return None
|
|
return LooseVersion(result.group(1))
|
|
|
|
def get_compiler_versions():
|
|
"""Returns a tuple providing the versions of gcc, ld and dllwrap
|
|
|
|
For each command, if a command is not found, None is returned.
|
|
Otherwise a LooseVersion instance is returned.
|
|
"""
|
|
gcc = _find_exe_version('gcc -dumpversion')
|
|
ld = _find_ld_version()
|
|
dllwrap = _find_exe_version('dllwrap --version')
|
|
return gcc, ld, dllwrap
|