cpython/Lib/distutils/util.py
Guido van Rossum 04110fb859 Merged revisions 57221-57391 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

........
  r57227 | facundo.batista | 2007-08-20 17:16:21 -0700 (Mon, 20 Aug 2007) | 5 lines


  Catch ProtocolError exceptions and include the header information in
  test output (to make it easier to debug test failures caused by
  problems in the server). [GSoC - Alan McIntyre]
........
  r57229 | mark.hammond | 2007-08-20 18:04:47 -0700 (Mon, 20 Aug 2007) | 5 lines

  [ 1761786 ] distutils.util.get_platform() return value on 64bit Windows
  As discussed on distutils-sig: Allows the generated installer name on
  64bit Windows platforms to be different than the name generated for
  32bit Windows platforms.
........
  r57230 | mark.hammond | 2007-08-20 18:05:16 -0700 (Mon, 20 Aug 2007) | 5 lines

  [ 1761786 ] distutils.util.get_platform() return value on 64bit Windows
  As discussed on distutils-sig: Allows the generated installer name on
  64bit Windows platforms to be different than the name generated for
  32bit Windows platforms.
........
  r57253 | georg.brandl | 2007-08-20 23:01:18 -0700 (Mon, 20 Aug 2007) | 2 lines

  Demand version 2.5.1 since 2.5 has a bug with codecs.open context managers.
........
  r57254 | georg.brandl | 2007-08-20 23:03:43 -0700 (Mon, 20 Aug 2007) | 2 lines

  Revert accidental checkins from last commit.
........
  r57255 | georg.brandl | 2007-08-20 23:07:08 -0700 (Mon, 20 Aug 2007) | 2 lines

  Bug #1777160: mention explicitly that e.g. -1**2 is -1.
........
  r57256 | georg.brandl | 2007-08-20 23:12:19 -0700 (Mon, 20 Aug 2007) | 3 lines

  Bug #1777168: replace operator names "opa"... with "op1"... and mark everything up as literal,
  to enhance readability.
........
  r57259 | facundo.batista | 2007-08-21 09:57:18 -0700 (Tue, 21 Aug 2007) | 8 lines


  Added test for behavior of operations on an unconnected SMTP object,
  and tests for NOOP, RSET, and VRFY. Corrected typo in a comment for
  testNonnumericPort. Added a check for constructing SMTP objects when
  non-numeric ports are included in the host name. Derived a server from
  SMTPServer to test various ESMTP/SMTP capabilities. Check that a
  second HELO to DebuggingServer returns an error. [GSoC - Alan McIntyre]
........
  r57279 | skip.montanaro | 2007-08-22 12:02:16 -0700 (Wed, 22 Aug 2007) | 2 lines

  Note that BeOS is unsupported as of Python 2.6.
........
  r57280 | skip.montanaro | 2007-08-22 12:05:21 -0700 (Wed, 22 Aug 2007) | 1 line

  whoops - need to check in configure as well
........
  r57284 | alex.martelli | 2007-08-22 14:14:17 -0700 (Wed, 22 Aug 2007) | 5 lines

  Fix compile.c so that it records 0.0 and -0.0 as separate constants in a code
  object's co_consts tuple; add a test to show that the previous behavior (where
  these two constants were "collapsed" into one) causes serious malfunctioning.
........
  r57286 | gregory.p.smith | 2007-08-22 14:32:34 -0700 (Wed, 22 Aug 2007) | 3 lines

  stop leaving log.0000001 __db.00* and xxx.db turds in developer
  sandboxes when bsddb3 tests are run.
........
  r57301 | jeffrey.yasskin | 2007-08-22 16:14:27 -0700 (Wed, 22 Aug 2007) | 3 lines

  When setup.py fails to find the necessary bits to build some modules, have it
  print a slightly more informative message.
........
  r57320 | brett.cannon | 2007-08-23 07:53:17 -0700 (Thu, 23 Aug 2007) | 2 lines

  Make test_runpy re-entrant.
........
  r57324 | georg.brandl | 2007-08-23 10:54:11 -0700 (Thu, 23 Aug 2007) | 2 lines

  Bug #1768121: fix wrong/missing opcode docs.
........
  r57326 | georg.brandl | 2007-08-23 10:57:05 -0700 (Thu, 23 Aug 2007) | 2 lines

  Bug #1766421: "return code" vs. "status code".
........
  r57328 | georg.brandl | 2007-08-23 11:08:06 -0700 (Thu, 23 Aug 2007) | 2 lines

  Second half of #1752175: #ifdef out references to PyImport_DynLoadFiletab if HAVE_DYNAMIC_LOADING is not defined.
........
  r57331 | georg.brandl | 2007-08-23 11:11:33 -0700 (Thu, 23 Aug 2007) | 2 lines

  Use try-except-finally in contextlib.
........
  r57343 | georg.brandl | 2007-08-23 13:35:00 -0700 (Thu, 23 Aug 2007) | 2 lines

  Bug #1697820: document that the old slice protocol is still used by builtin types.
........
  r57345 | georg.brandl | 2007-08-23 13:40:01 -0700 (Thu, 23 Aug 2007) | 2 lines

  Bug #1573854: fix docs for sqlite3 cursor rowcount attr.
........
  r57347 | georg.brandl | 2007-08-23 13:50:23 -0700 (Thu, 23 Aug 2007) | 2 lines

  Bug #1694833: fix imp.find_module() docs wrt. packages.
........
  r57348 | georg.brandl | 2007-08-23 13:53:28 -0700 (Thu, 23 Aug 2007) | 2 lines

  Bug #1594966: fix misleading usage example
........
  r57349 | georg.brandl | 2007-08-23 13:55:44 -0700 (Thu, 23 Aug 2007) | 2 lines

  Clarify wording a bit.
........
  r57351 | georg.brandl | 2007-08-23 14:18:44 -0700 (Thu, 23 Aug 2007) | 2 lines

  Bug #1752332: httplib no longer uses socket.getaddrinfo().
........
  r57352 | georg.brandl | 2007-08-23 14:21:36 -0700 (Thu, 23 Aug 2007) | 2 lines

  Bug #1734111: document struct.Struct.size.
........
  r57353 | georg.brandl | 2007-08-23 14:27:57 -0700 (Thu, 23 Aug 2007) | 2 lines

  Bug #1688564: document os.path.join's absolute path behavior in the docstring.
........
  r57354 | georg.brandl | 2007-08-23 14:36:05 -0700 (Thu, 23 Aug 2007) | 2 lines

  Bug #1625381: clarify match vs search introduction.
........
  r57355 | georg.brandl | 2007-08-23 14:42:54 -0700 (Thu, 23 Aug 2007) | 2 lines

  Bug #1758696: more info about descriptors.
........
  r57357 | georg.brandl | 2007-08-23 14:55:57 -0700 (Thu, 23 Aug 2007) | 2 lines

  Patch #1779550: remove redundant code in logging.
........
  r57378 | gregory.p.smith | 2007-08-23 22:11:38 -0700 (Thu, 23 Aug 2007) | 2 lines

  Fix bug 1725856.
........
  r57382 | georg.brandl | 2007-08-23 23:10:01 -0700 (Thu, 23 Aug 2007) | 2 lines

  uuid creation is now threadsafe, backport from py3k rev. 57375.
........
  r57389 | georg.brandl | 2007-08-24 04:47:37 -0700 (Fri, 24 Aug 2007) | 2 lines

  Bug #1765375: fix stripping of unwanted LDFLAGS.
........
  r57391 | guido.van.rossum | 2007-08-24 07:53:14 -0700 (Fri, 24 Aug 2007) | 2 lines

  Fix silly typo in test name.
........
2007-08-24 16:32:05 +00:00

530 lines
20 KiB
Python

"""distutils.util
Miscellaneous utility functions -- anything that doesn't fit into
one of the other *util.py modules.
"""
__revision__ = "$Id$"
import sys, os, string, re
from distutils.errors import DistutilsPlatformError
from distutils.dep_util import newer
from distutils.spawn import spawn
from distutils import log
def get_platform ():
"""Return a string that identifies the current platform. This is used
mainly to distinguish platform-specific build directories and
platform-specific built distributions. Typically includes the OS name
and version and the architecture (as supplied by 'os.uname()'),
although the exact information included depends on the OS; eg. for IRIX
the architecture isn't particularly important (IRIX only runs on SGI
hardware), but for Linux the kernel version isn't particularly
important.
Examples of returned values:
linux-i586
linux-alpha (?)
solaris-2.6-sun4u
irix-5.3
irix64-6.2
Windows will return one of:
win-x86_64 (64bit Windows on x86_64 (AMD64))
win-ia64 (64bit Windows on Itanium)
win32 (all others - specifically, sys.platform is returned)
For other non-POSIX platforms, currently just returns 'sys.platform'.
"""
if os.name == 'nt':
# sniff sys.version for architecture.
prefix = " bit ("
i = string.find(sys.version, prefix)
if i == -1:
return sys.platform
j = string.find(sys.version, ")", i)
look = sys.version[i+len(prefix):j].lower()
if look=='amd64':
return 'win-x86_64'
if look=='itanium':
return 'win-ia64'
return sys.platform
if os.name != "posix" or not hasattr(os, 'uname'):
# XXX what about the architecture? NT is Intel or Alpha,
# Mac OS is M68k or PPC, etc.
return sys.platform
# Try to distinguish various flavours of Unix
(osname, host, release, version, machine) = os.uname()
# Convert the OS name to lowercase, remove '/' characters
# (to accommodate BSD/OS), and translate spaces (for "Power Macintosh")
osname = osname.lower().replace('/', '')
machine = machine.replace(' ', '_')
machine = machine.replace('/', '-')
if osname[:5] == "linux":
# At least on Linux/Intel, 'machine' is the processor --
# i386, etc.
# XXX what about Alpha, SPARC, etc?
return "%s-%s" % (osname, machine)
elif osname[:5] == "sunos":
if release[0] >= "5": # SunOS 5 == Solaris 2
osname = "solaris"
release = "%d.%s" % (int(release[0]) - 3, release[2:])
# fall through to standard osname-release-machine representation
elif osname[:4] == "irix": # could be "irix64"!
return "%s-%s" % (osname, release)
elif osname[:3] == "aix":
return "%s-%s.%s" % (osname, version, release)
elif osname[:6] == "cygwin":
osname = "cygwin"
rel_re = re.compile (r'[\d.]+')
m = rel_re.match(release)
if m:
release = m.group()
elif osname[:6] == "darwin":
#
# For our purposes, we'll assume that the system version from
# distutils' perspective is what MACOSX_DEPLOYMENT_TARGET is set
# to. This makes the compatibility story a bit more sane because the
# machine is going to compile and link as if it were
# MACOSX_DEPLOYMENT_TARGET.
from distutils.sysconfig import get_config_vars
cfgvars = get_config_vars()
macver = os.environ.get('MACOSX_DEPLOYMENT_TARGET')
if not macver:
macver = cfgvars.get('MACOSX_DEPLOYMENT_TARGET')
if not macver:
# Get the system version. Reading this plist is a documented
# way to get the system version (see the documentation for
# the Gestalt Manager)
try:
f = open('/System/Library/CoreServices/SystemVersion.plist')
except IOError:
# We're on a plain darwin box, fall back to the default
# behaviour.
pass
else:
m = re.search(
r'<key>ProductUserVisibleVersion</key>\s*' +
r'<string>(.*?)</string>', f.read())
f.close()
if m is not None:
macver = '.'.join(m.group(1).split('.')[:2])
# else: fall back to the default behaviour
if macver:
from distutils.sysconfig import get_config_vars
release = macver
osname = "macosx"
if (release + '.') < '10.4.' and \
get_config_vars().get('UNIVERSALSDK', '').strip():
# The universal build will build fat binaries, but not on
# systems before 10.4
machine = 'fat'
elif machine in ('PowerPC', 'Power_Macintosh'):
# Pick a sane name for the PPC architecture.
machine = 'ppc'
return "%s-%s-%s" % (osname, release, machine)
# get_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 on non-Unix-ish systems if 'pathname' either starts or
ends with a slash.
"""
if os.sep == '/':
return pathname
if not pathname:
return pathname
if pathname[0] == '/':
raise ValueError, "path '%s' cannot be absolute" % pathname
if pathname[-1] == '/':
raise ValueError, "path '%s' cannot end with '/'" % pathname
paths = pathname.split('/')
while '.' in paths:
paths.remove('.')
if not paths:
return os.curdir
return os.path.join(*paths)
# 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 == 'os2':
(drive, path) = os.path.splitdrive(pathname)
if path[0] == os.sep:
path = path[1:]
return os.path.join(new_root, path)
elif os.name == 'mac':
if not os.path.isabs(pathname):
return os.path.join(new_root, pathname)
else:
# Chop off volume name from start of path
elements = pathname.split(":", 1)
pathname = ":" + elements[1]
return os.path.join(new_root, pathname)
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 - description of the current platform, including hardware
and OS (see 'get_platform()')
"""
global _environ_checked
if _environ_checked:
return
if os.name == 'posix' and 'HOME' not in os.environ:
import pwd
os.environ['HOME'] = pwd.getpwuid(os.getuid())[5]
if 'PLAT' not in os.environ:
os.environ['PLAT'] = get_platform()
_environ_checked = 1
def subst_vars (s, local_vars):
"""Perform shell/Perl-style variable substitution on 'string'. Every
occurrence of '$' followed by a name is considered a variable, and
variable is substituted by the value found in the 'local_vars'
dictionary, or in 'os.environ' if it's not in 'local_vars'.
'os.environ' is first checked/augmented to guarantee that it contains
certain values: see 'check_environ()'. Raise ValueError for any
variables not found in either 'local_vars' or 'os.environ'.
"""
check_environ()
def _subst (match, local_vars=local_vars):
var_name = match.group(1)
if var_name in local_vars:
return str(local_vars[var_name])
else:
return os.environ[var_name]
try:
return re.sub(r'\$([a-zA-Z_][a-zA-Z_0-9]*)', _subst, s)
except KeyError as var:
raise ValueError, "invalid variable '$%s'" % var
# 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 = _squote_re = _dquote_re = None
def _init_regex():
global _wordchars_re, _squote_re, _dquote_re
_wordchars_re = re.compile(r'[^\\\'\"%s ]*' % string.whitespace)
_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...
if _wordchars_re is None: _init_regex()
s = s.strip()
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] in string.whitespace: # unescaped, unquoted whitespace: now
words.append(s[:end]) # we definitely have a word delimiter
s = s[end:].lstrip()
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 ()
def execute (func, args, msg=None, verbose=0, dry_run=0):
"""Perform some action that affects the outside world (eg. by
writing to the filesystem). Such actions are special because they
are disabled by the 'dry_run' flag. This method takes care of all
that bureaucracy for you; all you have to do is supply the
function to call and an argument tuple for it (to embody the
"external action" being performed), and an optional message to
print.
"""
if msg is None:
msg = "%s%r" % (func.__name__, args)
if msg[-2:] == ',)': # correct for singleton tuple
msg = msg[0:-2] + ')'
log.info(msg)
if not dry_run:
func(*args)
def strtobool (val):
"""Convert a string representation of truth to true (1) or false (0).
True values are 'y', 'yes', 't', 'true', 'on', and '1'; false values
are 'n', 'no', 'f', 'false', 'off', and '0'. Raises ValueError if
'val' is anything else.
"""
val = val.lower()
if val in ('y', 'yes', 't', 'true', 'on', '1'):
return 1
elif val in ('n', 'no', 'f', 'false', 'off', '0'):
return 0
else:
raise ValueError, "invalid truth value %r" % (val,)
def byte_compile (py_files,
optimize=0, force=0,
prefix=None, base_dir=None,
verbose=1, dry_run=0,
direct=None):
"""Byte-compile a collection of Python source files to either .pyc
or .pyo files in the same directory. 'py_files' is a list of files
to compile; any files that don't end in ".py" are silently skipped.
'optimize' must be one of the following:
0 - don't optimize (generate .pyc)
1 - normal optimization (like "python -O")
2 - extra optimization (like "python -OO")
If 'force' is true, all files are recompiled regardless of
timestamps.
The source filename encoded in each bytecode file defaults to the
filenames listed in 'py_files'; you can modify these with 'prefix' and
'basedir'. 'prefix' is a string that will be stripped off of each
source filename, and 'base_dir' is a directory name that will be
prepended (after 'prefix' is stripped). You can supply either or both
(or neither) of 'prefix' and 'base_dir', as you wish.
If 'dry_run' is true, doesn't actually do anything that would
affect the filesystem.
Byte-compilation is either done directly in this interpreter process
with the standard py_compile module, or indirectly by writing a
temporary script and executing it. Normally, you should let
'byte_compile()' figure out to use direct compilation or not (see
the source for details). The 'direct' flag is used by the script
generated in indirect mode; unless you know what you're doing, leave
it set to None.
"""
# First, if the caller didn't force us into direct or indirect mode,
# figure out which mode we should be in. We take a conservative
# approach: choose direct mode *only* if the current interpreter is
# in debug mode and optimize is 0. If we're not in debug mode (-O
# or -OO), we don't know which level of optimization this
# interpreter is running with, so we can't do direct
# byte-compilation and be certain that it's the right thing. Thus,
# always compile indirectly if the current interpreter is in either
# optimize mode, or if either optimization level was requested by
# the caller.
if direct is None:
direct = (__debug__ and optimize == 0)
# "Indirect" byte-compilation: write a temporary script and then
# run it with the appropriate flags.
if not direct:
try:
from tempfile import mkstemp
(script_fd, script_name) = mkstemp(".py")
except ImportError:
from tempfile import mktemp
(script_fd, script_name) = None, mktemp(".py")
log.info("writing byte-compilation script '%s'", script_name)
if not dry_run:
if script_fd is not None:
script = os.fdopen(script_fd, "w")
else:
script = open(script_name, "w")
script.write("""\
from distutils.util import byte_compile
files = [
""")
# XXX would be nice to write absolute filenames, just for
# safety's sake (script should be more robust in the face of
# chdir'ing before running it). But this requires abspath'ing
# 'prefix' as well, and that breaks the hack in build_lib's
# 'byte_compile()' method that carefully tacks on a trailing
# slash (os.sep really) to make sure the prefix here is "just
# right". This whole prefix business is rather delicate -- the
# problem is that it's really a directory, but I'm treating it
# 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)
# byte_compile ()
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)