mirror of https://github.com/python/cpython
236 lines
7.8 KiB
Python
236 lines
7.8 KiB
Python
"""distutils.util
|
|
|
|
Miscellaneous utility functions -- anything that doesn't fit into
|
|
one of the other *util.py modules."""
|
|
|
|
# created 1999/03/08, Greg Ward
|
|
|
|
__revision__ = "$Id$"
|
|
|
|
import sys, os, string, re, shutil
|
|
from distutils.errors import *
|
|
from distutils.spawn import spawn
|
|
|
|
# for backwards compatibility:
|
|
from distutils.file_util import *
|
|
from distutils.dir_util import *
|
|
from distutils.dep_util import *
|
|
from distutils.archive_util import *
|
|
|
|
|
|
# Need to define 'abspath()', because it was new with Python 1.5.2
|
|
if hasattr (os.path, 'abspath'):
|
|
abspath = os.path.abspath
|
|
else:
|
|
def abspath(path):
|
|
if not os.path.isabs(path):
|
|
path = os.path.join(os.getcwd(), path)
|
|
return os.path.normpath(path)
|
|
|
|
|
|
# More backwards compatability hacks
|
|
def extend (list, new_list):
|
|
"""Appends the list 'new_list' to 'list', just like the 'extend()'
|
|
list method does in Python 1.5.2 -- but this works on earlier
|
|
versions of Python too."""
|
|
|
|
if hasattr (list, 'extend'):
|
|
list.extend (new_list)
|
|
else:
|
|
list[len(list):] = new_list
|
|
|
|
# extend ()
|
|
|
|
|
|
def get_platform ():
|
|
"""Return a string (suitable for tacking onto directory names) that
|
|
identifies the current platform. Currently, this is just
|
|
'sys.platform'.
|
|
"""
|
|
return sys.platform
|
|
|
|
|
|
def convert_path (pathname):
|
|
"""Return 'pathname' as a name that will work on the native
|
|
filesystem, i.e. split it on '/' and put it back together again
|
|
using the current directory separator. Needed because filenames in
|
|
the setup script are always supplied in Unix style, and have to be
|
|
converted to the local convention before we can actually use them in
|
|
the filesystem. Raises ValueError if 'pathname' is
|
|
absolute (starts with '/') or contains local directory separators
|
|
(unless the local separator is '/', of course)."""
|
|
|
|
if pathname[0] == '/':
|
|
raise ValueError, "path '%s' cannot be absolute" % pathname
|
|
if pathname[-1] == '/':
|
|
raise ValueError, "path '%s' cannot end with '/'" % pathname
|
|
if os.sep != '/':
|
|
paths = string.split (pathname, '/')
|
|
return apply (os.path.join, paths)
|
|
else:
|
|
return pathname
|
|
|
|
# convert_path ()
|
|
|
|
|
|
def change_root (new_root, pathname):
|
|
"""Return 'pathname' with 'new_root' prepended. If 'pathname' is
|
|
relative, this is equivalent to "os.path.join(new_root,pathname)".
|
|
Otherwise, it requires making 'pathname' relative and then joining the
|
|
two, which is tricky on DOS/Windows and Mac OS.
|
|
"""
|
|
if os.name == 'posix':
|
|
if not os.path.isabs (pathname):
|
|
return os.path.join (new_root, pathname)
|
|
else:
|
|
return os.path.join (new_root, pathname[1:])
|
|
|
|
elif os.name == 'nt':
|
|
(drive, path) = os.path.splitdrive (pathname)
|
|
if path[0] == '\\':
|
|
path = path[1:]
|
|
return os.path.join (new_root, path)
|
|
|
|
elif os.name == 'mac':
|
|
raise RuntimeError, "no clue how to do this on Mac OS"
|
|
|
|
else:
|
|
raise DistutilsPlatformError, \
|
|
"nothing known about platform '%s'" % os.name
|
|
|
|
|
|
_environ_checked = 0
|
|
def check_environ ():
|
|
"""Ensure that 'os.environ' has all the environment variables we
|
|
guarantee that users can use in config files, command-line
|
|
options, etc. Currently this includes:
|
|
HOME - user's home directory (Unix only)
|
|
PLAT - desription of the current platform, including hardware
|
|
and OS (see 'get_platform()')
|
|
"""
|
|
|
|
global _environ_checked
|
|
if _environ_checked:
|
|
return
|
|
|
|
if os.name == 'posix' and not os.environ.has_key('HOME'):
|
|
import pwd
|
|
os.environ['HOME'] = pwd.getpwuid (os.getuid())[5]
|
|
|
|
if not os.environ.has_key('PLAT'):
|
|
os.environ['PLAT'] = get_platform ()
|
|
|
|
_environ_checked = 1
|
|
|
|
|
|
def subst_vars (str, local_vars):
|
|
"""Perform shell/Perl-style variable substitution on 'string'.
|
|
Every occurence of '$' followed by a name, or a name enclosed in
|
|
braces, is considered a variable. Every variable is substituted by
|
|
the value found in the 'local_vars' dictionary, or in 'os.environ'
|
|
if it's not in 'local_vars'. 'os.environ' is first checked/
|
|
augmented to guarantee that it contains certain values: see
|
|
'_check_environ()'. Raise ValueError for any variables not found in
|
|
either 'local_vars' or 'os.environ'."""
|
|
|
|
check_environ ()
|
|
def _subst (match, local_vars=local_vars):
|
|
var_name = match.group(1)
|
|
if local_vars.has_key (var_name):
|
|
return str (local_vars[var_name])
|
|
else:
|
|
return os.environ[var_name]
|
|
|
|
return re.sub (r'\$([a-zA-Z_][a-zA-Z_0-9]*)', _subst, str)
|
|
|
|
# subst_vars ()
|
|
|
|
|
|
def grok_environment_error (exc, prefix="error: "):
|
|
"""Generate a useful error message from an EnvironmentError (IOError or
|
|
OSError) exception object. Handles Python 1.5.1 and 1.5.2 styles, and
|
|
does what it can to deal with exception objects that don't have a
|
|
filename (which happens when the error is due to a two-file operation,
|
|
such as 'rename()' or 'link()'. Returns the error message as a string
|
|
prefixed with 'prefix'.
|
|
"""
|
|
# check for Python 1.5.2-style {IO,OS}Error exception objects
|
|
if hasattr (exc, 'filename') and hasattr (exc, 'strerror'):
|
|
if exc.filename:
|
|
error = prefix + "%s: %s" % (exc.filename, exc.strerror)
|
|
else:
|
|
# two-argument functions in posix module don't
|
|
# include the filename in the exception object!
|
|
error = prefix + "%s" % exc.strerror
|
|
else:
|
|
error = prefix + str(exc[-1])
|
|
|
|
return error
|
|
|
|
|
|
# Needed by 'split_quoted()'
|
|
_wordchars_re = re.compile(r'[^\\\'\"\ ]*')
|
|
_squote_re = re.compile(r"'(?:[^'\\]|\\.)*'")
|
|
_dquote_re = re.compile(r'"(?:[^"\\]|\\.)*"')
|
|
|
|
def split_quoted (s):
|
|
"""Split a string up according to Unix shell-like rules for quotes and
|
|
backslashes. In short: words are delimited by spaces, as long as those
|
|
spaces are not escaped by a backslash, or inside a quoted string.
|
|
Single and double quotes are equivalent, and the quote characters can
|
|
be backslash-escaped. The backslash is stripped from any two-character
|
|
escape sequence, leaving only the escaped character. The quote
|
|
characters are stripped from any quoted string. Returns a list of
|
|
words.
|
|
"""
|
|
|
|
# This is a nice algorithm for splitting up a single string, since it
|
|
# doesn't require character-by-character examination. It was a little
|
|
# bit of a brain-bender to get it working right, though...
|
|
|
|
s = string.strip(s)
|
|
words = []
|
|
pos = 0
|
|
|
|
while s:
|
|
m = _wordchars_re.match(s, pos)
|
|
end = m.end()
|
|
if end == len(s):
|
|
words.append(s[:end])
|
|
break
|
|
|
|
if s[end] == ' ': # unescaped, unquoted space: now
|
|
words.append(s[:end]) # we definitely have a word delimiter
|
|
s = string.lstrip(s[end:])
|
|
pos = 0
|
|
|
|
elif s[end] == '\\': # preserve whatever is being escaped;
|
|
# will become part of the current word
|
|
s = s[:end] + s[end+1:]
|
|
pos = end+1
|
|
|
|
else:
|
|
if s[end] == "'": # slurp singly-quoted string
|
|
m = _squote_re.match(s, end)
|
|
elif s[end] == '"': # slurp doubly-quoted string
|
|
m = _dquote_re.match(s, end)
|
|
else:
|
|
raise RuntimeError, \
|
|
"this can't happen (bad char '%c')" % s[end]
|
|
|
|
if m is None:
|
|
raise ValueError, \
|
|
"bad string (mismatched %s quotes?)" % s[end]
|
|
|
|
(beg, end) = m.span()
|
|
s = s[:beg] + s[beg+1:end-1] + s[end:]
|
|
pos = m.end() - 2
|
|
|
|
if pos >= len(s):
|
|
words.append(s)
|
|
break
|
|
|
|
return words
|
|
|
|
# split_quoted ()
|