514 lines
18 KiB
Python
514 lines
18 KiB
Python
"""distutils.util
|
|
|
|
Miscellaneous utility functions -- anything that doesn't fit into
|
|
one of the other *util.py modules.
|
|
"""
|
|
|
|
import importlib.util
|
|
import os
|
|
import re
|
|
import string
|
|
import subprocess
|
|
import sys
|
|
import sysconfig
|
|
import functools
|
|
|
|
from .errors import DistutilsPlatformError, DistutilsByteCompileError
|
|
from .dep_util import newer
|
|
from .spawn import spawn
|
|
from ._log import log
|
|
|
|
|
|
def get_host_platform():
|
|
"""
|
|
Return a string that identifies the current platform. Use this
|
|
function to distinguish platform-specific build directories and
|
|
platform-specific built distributions.
|
|
"""
|
|
|
|
# This function initially exposed platforms as defined in Python 3.9
|
|
# even with older Python versions when distutils was split out.
|
|
# Now it delegates to stdlib sysconfig, but maintains compatibility.
|
|
|
|
if sys.version_info < (3, 8):
|
|
if os.name == 'nt':
|
|
if '(arm)' in sys.version.lower():
|
|
return 'win-arm32'
|
|
if '(arm64)' in sys.version.lower():
|
|
return 'win-arm64'
|
|
|
|
if sys.version_info < (3, 9):
|
|
if os.name == "posix" and hasattr(os, 'uname'):
|
|
osname, host, release, version, machine = os.uname()
|
|
if osname[:3] == "aix":
|
|
from .py38compat import aix_platform
|
|
|
|
return aix_platform(osname, version, release)
|
|
|
|
return sysconfig.get_platform()
|
|
|
|
|
|
def get_platform():
|
|
if os.name == 'nt':
|
|
TARGET_TO_PLAT = {
|
|
'x86': 'win32',
|
|
'x64': 'win-amd64',
|
|
'arm': 'win-arm32',
|
|
'arm64': 'win-arm64',
|
|
}
|
|
target = os.environ.get('VSCMD_ARG_TGT_ARCH')
|
|
return TARGET_TO_PLAT.get(target) or get_host_platform()
|
|
return get_host_platform()
|
|
|
|
|
|
if sys.platform == 'darwin':
|
|
_syscfg_macosx_ver = None # cache the version pulled from sysconfig
|
|
MACOSX_VERSION_VAR = 'MACOSX_DEPLOYMENT_TARGET'
|
|
|
|
|
|
def _clear_cached_macosx_ver():
|
|
"""For testing only. Do not call."""
|
|
global _syscfg_macosx_ver
|
|
_syscfg_macosx_ver = None
|
|
|
|
|
|
def get_macosx_target_ver_from_syscfg():
|
|
"""Get the version of macOS latched in the Python interpreter configuration.
|
|
Returns the version as a string or None if can't obtain one. Cached."""
|
|
global _syscfg_macosx_ver
|
|
if _syscfg_macosx_ver is None:
|
|
from distutils import sysconfig
|
|
|
|
ver = sysconfig.get_config_var(MACOSX_VERSION_VAR) or ''
|
|
if ver:
|
|
_syscfg_macosx_ver = ver
|
|
return _syscfg_macosx_ver
|
|
|
|
|
|
def get_macosx_target_ver():
|
|
"""Return the version of macOS for which we are building.
|
|
|
|
The target version defaults to the version in sysconfig latched at time
|
|
the Python interpreter was built, unless overridden by an environment
|
|
variable. If neither source has a value, then None is returned"""
|
|
|
|
syscfg_ver = get_macosx_target_ver_from_syscfg()
|
|
env_ver = os.environ.get(MACOSX_VERSION_VAR)
|
|
|
|
if env_ver:
|
|
# Validate overridden version against sysconfig version, if have both.
|
|
# Ensure that the deployment target of the build process is not less
|
|
# than 10.3 if the interpreter was built for 10.3 or later. This
|
|
# ensures extension modules are built with correct compatibility
|
|
# values, specifically LDSHARED which can use
|
|
# '-undefined dynamic_lookup' which only works on >= 10.3.
|
|
if (
|
|
syscfg_ver
|
|
and split_version(syscfg_ver) >= [10, 3]
|
|
and split_version(env_ver) < [10, 3]
|
|
):
|
|
my_msg = (
|
|
'$' + MACOSX_VERSION_VAR + ' mismatch: '
|
|
'now "%s" but "%s" during configure; '
|
|
'must use 10.3 or later' % (env_ver, syscfg_ver)
|
|
)
|
|
raise DistutilsPlatformError(my_msg)
|
|
return env_ver
|
|
return syscfg_ver
|
|
|
|
|
|
def split_version(s):
|
|
"""Convert a dot-separated string into a list of numbers for comparisons"""
|
|
return [int(n) for n in s.split('.')]
|
|
|
|
|
|
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)
|
|
|
|
raise DistutilsPlatformError(f"nothing known about platform '{os.name}'")
|
|
|
|
|
|
@functools.lru_cache()
|
|
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()')
|
|
"""
|
|
if os.name == 'posix' and 'HOME' not in os.environ:
|
|
try:
|
|
import pwd
|
|
|
|
os.environ['HOME'] = pwd.getpwuid(os.getuid())[5]
|
|
except (ImportError, KeyError):
|
|
# bpo-10496: if the current user identifier doesn't exist in the
|
|
# password database, do nothing
|
|
pass
|
|
|
|
if 'PLAT' not in os.environ:
|
|
os.environ['PLAT'] = get_platform()
|
|
|
|
|
|
def subst_vars(s, local_vars):
|
|
"""
|
|
Perform variable substitution on 'string'.
|
|
Variables are indicated by format-style braces ("{var}").
|
|
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()
|
|
lookup = dict(os.environ)
|
|
lookup.update((name, str(value)) for name, value in local_vars.items())
|
|
try:
|
|
return _subst_compat(s).format_map(lookup)
|
|
except KeyError as var:
|
|
raise ValueError(f"invalid variable {var}")
|
|
|
|
|
|
def _subst_compat(s):
|
|
"""
|
|
Replace shell/Perl-style variable substitution with
|
|
format-style. For compatibility.
|
|
"""
|
|
|
|
def _subst(match):
|
|
return f'{{{match.group(1)}}}'
|
|
|
|
repl = re.sub(r'\$([a-zA-Z_][a-zA-Z_0-9]*)', _subst, s)
|
|
if repl != s:
|
|
import warnings
|
|
|
|
warnings.warn(
|
|
"shell/Perl-style substitions are deprecated",
|
|
DeprecationWarning,
|
|
)
|
|
return repl
|
|
|
|
|
|
def grok_environment_error(exc, prefix="error: "):
|
|
# Function kept for backward compatibility.
|
|
# Used to try clever things with EnvironmentErrors,
|
|
# but nowadays str(exception) produces good messages.
|
|
return prefix + str(exc)
|
|
|
|
|
|
# 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
|
|
# we definitely have a word delimiter
|
|
words.append(s[:end])
|
|
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 = "{}{!r}".format(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}".format(val))
|
|
|
|
|
|
def byte_compile( # noqa: C901
|
|
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 .pyc
|
|
files in a __pycache__ subdirectory. '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
|
|
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.
|
|
"""
|
|
|
|
# nothing is done if sys.dont_write_bytecode is True
|
|
if sys.dont_write_bytecode:
|
|
raise DistutilsByteCompileError('byte-compiling is disabled.')
|
|
|
|
# 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")
|
|
|
|
with script:
|
|
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.
|
|
|
|
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)
|
|
)
|
|
|
|
cmd = [sys.executable]
|
|
cmd.extend(subprocess._optim_args_from_interpreter_flags())
|
|
cmd.append(script_name)
|
|
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)
|
|
if optimize >= 0:
|
|
opt = '' if optimize == 0 else optimize
|
|
cfile = importlib.util.cache_from_source(file, optimization=opt)
|
|
else:
|
|
cfile = importlib.util.cache_from_source(file)
|
|
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 = header.split('\n')
|
|
sep = '\n' + 8 * ' '
|
|
return sep.join(lines)
|