mirror of https://github.com/python/cpython.git
104 lines
3.5 KiB
Python
104 lines
3.5 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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# created 1999/03/08, Greg Ward
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__revision__ = "$Id$"
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import sys, os, string, re, shutil
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from distutils.errors import *
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from distutils.spawn import spawn
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# for backwards compatibility:
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from distutils.file_util import *
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from distutils.dir_util import *
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from distutils.dep_util import *
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from distutils.archive_util import *
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def get_platform ():
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"""Return a string (suitable for tacking onto directory names) that
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identifies the current platform. Under Unix, identifies both the OS
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and hardware architecture, e.g. "linux-i586", "solaris-sparc",
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"irix-mips". For Windows and Mac OS, just returns 'sys.platform' --
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i.e. "???" or "???"."""
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if os.name == 'posix':
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(OS, _, rel, _, arch) = os.uname()
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return "%s%c-%s" % (string.lower (OS), rel[0], string.lower (arch))
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else:
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return sys.platform
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# get_platform()
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def native_path (pathname):
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"""Return 'pathname' as a name that will work on the native
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filesystem, i.e. split it on '/' and put it back together again
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using the current directory separator. Needed because filenames in
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the setup script are always supplied in Unix style, and have to be
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converted to the local convention before we can actually use them in
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the filesystem. Raises ValueError if 'pathname' is
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absolute (starts with '/') or contains local directory separators
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(unless the local separator is '/', of course)."""
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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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if os.sep != '/' and os.sep in pathname:
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raise ValueError, \
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"path '%s' cannot contain '%c' character" % \
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(pathname, os.sep)
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paths = string.split (pathname, '/')
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return apply (os.path.join, paths)
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else:
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return pathname
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# native_path ()
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def _check_environ ():
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"""Ensure that 'os.environ' has all the environment variables we
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guarantee that users can use in config files, command-line
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options, etc. Currently this includes:
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HOME - user's home directory (Unix only)
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PLAT - desription of the current platform, including hardware
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and OS (see 'get_platform()')
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"""
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if os.name == 'posix' and not os.environ.has_key('HOME'):
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import pwd
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os.environ['HOME'] = pwd.getpwuid (os.getuid())[5]
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if not os.environ.has_key('PLAT'):
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os.environ['PLAT'] = get_platform ()
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def subst_vars (str, local_vars):
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"""Perform shell/Perl-style variable substitution on 'string'.
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Every occurence of '$' followed by a name, or a name enclosed in
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braces, is considered a variable. Every variable is substituted by
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the value found in the 'local_vars' dictionary, or in 'os.environ'
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if it's not in 'local_vars'. 'os.environ' is first checked/
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augmented to guarantee that it contains certain values: see
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'_check_environ()'. Raise ValueError for any variables not found in
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either 'local_vars' or 'os.environ'."""
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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 local_vars.has_key (var_name):
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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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return re.sub (r'\$([a-zA-Z_][a-zA-Z_0-9]*)', _subst, str)
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# subst_vars ()
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