403 lines
18 KiB
Python
403 lines
18 KiB
Python
"""distutils.cmd
|
|
|
|
Provides the Command class, the base class for the command classes
|
|
in the distutils.command package.
|
|
"""
|
|
|
|
import sys, os, re
|
|
from distutils.errors import DistutilsOptionError
|
|
from distutils import util, dir_util, file_util, archive_util, dep_util
|
|
from distutils import log
|
|
|
|
class Command:
|
|
"""Abstract base class for defining command classes, the "worker bees"
|
|
of the Distutils. A useful analogy for command classes is to think of
|
|
them as subroutines with local variables called "options". The options
|
|
are "declared" in 'initialize_options()' and "defined" (given their
|
|
final values, aka "finalized") in 'finalize_options()', both of which
|
|
must be defined by every command class. The distinction between the
|
|
two is necessary because option values might come from the outside
|
|
world (command line, config file, ...), and any options dependent on
|
|
other options must be computed *after* these outside influences have
|
|
been processed -- hence 'finalize_options()'. The "body" of the
|
|
subroutine, where it does all its work based on the values of its
|
|
options, is the 'run()' method, which must also be implemented by every
|
|
command class.
|
|
"""
|
|
|
|
# 'sub_commands' formalizes the notion of a "family" of commands,
|
|
# eg. "install" as the parent with sub-commands "install_lib",
|
|
# "install_headers", etc. The parent of a family of commands
|
|
# defines 'sub_commands' as a class attribute; it's a list of
|
|
# (command_name : string, predicate : unbound_method | string | None)
|
|
# tuples, where 'predicate' is a method of the parent command that
|
|
# determines whether the corresponding command is applicable in the
|
|
# current situation. (Eg. we "install_headers" is only applicable if
|
|
# we have any C header files to install.) If 'predicate' is None,
|
|
# that command is always applicable.
|
|
#
|
|
# 'sub_commands' is usually defined at the *end* of a class, because
|
|
# predicates can be unbound methods, so they must already have been
|
|
# defined. The canonical example is the "install" command.
|
|
sub_commands = []
|
|
|
|
|
|
# -- Creation/initialization methods -------------------------------
|
|
|
|
def __init__(self, dist):
|
|
"""Create and initialize a new Command object. Most importantly,
|
|
invokes the 'initialize_options()' method, which is the real
|
|
initializer and depends on the actual command being
|
|
instantiated.
|
|
"""
|
|
# late import because of mutual dependence between these classes
|
|
from distutils.dist import Distribution
|
|
|
|
if not isinstance(dist, Distribution):
|
|
raise TypeError("dist must be a Distribution instance")
|
|
if self.__class__ is Command:
|
|
raise RuntimeError("Command is an abstract class")
|
|
|
|
self.distribution = dist
|
|
self.initialize_options()
|
|
|
|
# Per-command versions of the global flags, so that the user can
|
|
# customize Distutils' behaviour command-by-command and let some
|
|
# commands fall back on the Distribution's behaviour. None means
|
|
# "not defined, check self.distribution's copy", while 0 or 1 mean
|
|
# false and true (duh). Note that this means figuring out the real
|
|
# value of each flag is a touch complicated -- hence "self._dry_run"
|
|
# will be handled by __getattr__, below.
|
|
# XXX This needs to be fixed.
|
|
self._dry_run = None
|
|
|
|
# verbose is largely ignored, but needs to be set for
|
|
# backwards compatibility (I think)?
|
|
self.verbose = dist.verbose
|
|
|
|
# Some commands define a 'self.force' option to ignore file
|
|
# timestamps, but methods defined *here* assume that
|
|
# 'self.force' exists for all commands. So define it here
|
|
# just to be safe.
|
|
self.force = None
|
|
|
|
# The 'help' flag is just used for command-line parsing, so
|
|
# none of that complicated bureaucracy is needed.
|
|
self.help = 0
|
|
|
|
# 'finalized' records whether or not 'finalize_options()' has been
|
|
# called. 'finalize_options()' itself should not pay attention to
|
|
# this flag: it is the business of 'ensure_finalized()', which
|
|
# always calls 'finalize_options()', to respect/update it.
|
|
self.finalized = 0
|
|
|
|
# XXX A more explicit way to customize dry_run would be better.
|
|
def __getattr__(self, attr):
|
|
if attr == 'dry_run':
|
|
myval = getattr(self, "_" + attr)
|
|
if myval is None:
|
|
return getattr(self.distribution, attr)
|
|
else:
|
|
return myval
|
|
else:
|
|
raise AttributeError(attr)
|
|
|
|
def ensure_finalized(self):
|
|
if not self.finalized:
|
|
self.finalize_options()
|
|
self.finalized = 1
|
|
|
|
# Subclasses must define:
|
|
# initialize_options()
|
|
# provide default values for all options; may be customized by
|
|
# setup script, by options from config file(s), or by command-line
|
|
# options
|
|
# finalize_options()
|
|
# decide on the final values for all options; this is called
|
|
# after all possible intervention from the outside world
|
|
# (command-line, option file, etc.) has been processed
|
|
# run()
|
|
# run the command: do whatever it is we're here to do,
|
|
# controlled by the command's various option values
|
|
|
|
def initialize_options(self):
|
|
"""Set default values for all the options that this command
|
|
supports. Note that these defaults may be overridden by other
|
|
commands, by the setup script, by config files, or by the
|
|
command-line. Thus, this is not the place to code dependencies
|
|
between options; generally, 'initialize_options()' implementations
|
|
are just a bunch of "self.foo = None" assignments.
|
|
|
|
This method must be implemented by all command classes.
|
|
"""
|
|
raise RuntimeError("abstract method -- subclass %s must override"
|
|
% self.__class__)
|
|
|
|
def finalize_options(self):
|
|
"""Set final values for all the options that this command supports.
|
|
This is always called as late as possible, ie. after any option
|
|
assignments from the command-line or from other commands have been
|
|
done. Thus, this is the place to code option dependencies: if
|
|
'foo' depends on 'bar', then it is safe to set 'foo' from 'bar' as
|
|
long as 'foo' still has the same value it was assigned in
|
|
'initialize_options()'.
|
|
|
|
This method must be implemented by all command classes.
|
|
"""
|
|
raise RuntimeError("abstract method -- subclass %s must override"
|
|
% self.__class__)
|
|
|
|
|
|
def dump_options(self, header=None, indent=""):
|
|
from distutils.fancy_getopt import longopt_xlate
|
|
if header is None:
|
|
header = "command options for '%s':" % self.get_command_name()
|
|
self.announce(indent + header, level=log.INFO)
|
|
indent = indent + " "
|
|
for (option, _, _) in self.user_options:
|
|
option = option.translate(longopt_xlate)
|
|
if option[-1] == "=":
|
|
option = option[:-1]
|
|
value = getattr(self, option)
|
|
self.announce(indent + "%s = %s" % (option, value),
|
|
level=log.INFO)
|
|
|
|
def run(self):
|
|
"""A command's raison d'etre: carry out the action it exists to
|
|
perform, controlled by the options initialized in
|
|
'initialize_options()', customized by other commands, the setup
|
|
script, the command-line, and config files, and finalized in
|
|
'finalize_options()'. All terminal output and filesystem
|
|
interaction should be done by 'run()'.
|
|
|
|
This method must be implemented by all command classes.
|
|
"""
|
|
raise RuntimeError("abstract method -- subclass %s must override"
|
|
% self.__class__)
|
|
|
|
def announce(self, msg, level=1):
|
|
"""If the current verbosity level is of greater than or equal to
|
|
'level' print 'msg' to stdout.
|
|
"""
|
|
log.log(level, msg)
|
|
|
|
def debug_print(self, msg):
|
|
"""Print 'msg' to stdout if the global DEBUG (taken from the
|
|
DISTUTILS_DEBUG environment variable) flag is true.
|
|
"""
|
|
from distutils.debug import DEBUG
|
|
if DEBUG:
|
|
print(msg)
|
|
sys.stdout.flush()
|
|
|
|
|
|
# -- Option validation methods -------------------------------------
|
|
# (these are very handy in writing the 'finalize_options()' method)
|
|
#
|
|
# NB. the general philosophy here is to ensure that a particular option
|
|
# value meets certain type and value constraints. If not, we try to
|
|
# force it into conformance (eg. if we expect a list but have a string,
|
|
# split the string on comma and/or whitespace). If we can't force the
|
|
# option into conformance, raise DistutilsOptionError. Thus, command
|
|
# classes need do nothing more than (eg.)
|
|
# self.ensure_string_list('foo')
|
|
# and they can be guaranteed that thereafter, self.foo will be
|
|
# a list of strings.
|
|
|
|
def _ensure_stringlike(self, option, what, default=None):
|
|
val = getattr(self, option)
|
|
if val is None:
|
|
setattr(self, option, default)
|
|
return default
|
|
elif not isinstance(val, str):
|
|
raise DistutilsOptionError("'%s' must be a %s (got `%s`)"
|
|
% (option, what, val))
|
|
return val
|
|
|
|
def ensure_string(self, option, default=None):
|
|
"""Ensure that 'option' is a string; if not defined, set it to
|
|
'default'.
|
|
"""
|
|
self._ensure_stringlike(option, "string", default)
|
|
|
|
def ensure_string_list(self, option):
|
|
r"""Ensure that 'option' is a list of strings. If 'option' is
|
|
currently a string, we split it either on /,\s*/ or /\s+/, so
|
|
"foo bar baz", "foo,bar,baz", and "foo, bar baz" all become
|
|
["foo", "bar", "baz"].
|
|
"""
|
|
val = getattr(self, option)
|
|
if val is None:
|
|
return
|
|
elif isinstance(val, str):
|
|
setattr(self, option, re.split(r',\s*|\s+', val))
|
|
else:
|
|
if isinstance(val, list):
|
|
ok = all(isinstance(v, str) for v in val)
|
|
else:
|
|
ok = False
|
|
if not ok:
|
|
raise DistutilsOptionError(
|
|
"'%s' must be a list of strings (got %r)"
|
|
% (option, val))
|
|
|
|
def _ensure_tested_string(self, option, tester, what, error_fmt,
|
|
default=None):
|
|
val = self._ensure_stringlike(option, what, default)
|
|
if val is not None and not tester(val):
|
|
raise DistutilsOptionError(("error in '%s' option: " + error_fmt)
|
|
% (option, val))
|
|
|
|
def ensure_filename(self, option):
|
|
"""Ensure that 'option' is the name of an existing file."""
|
|
self._ensure_tested_string(option, os.path.isfile,
|
|
"filename",
|
|
"'%s' does not exist or is not a file")
|
|
|
|
def ensure_dirname(self, option):
|
|
self._ensure_tested_string(option, os.path.isdir,
|
|
"directory name",
|
|
"'%s' does not exist or is not a directory")
|
|
|
|
|
|
# -- Convenience methods for commands ------------------------------
|
|
|
|
def get_command_name(self):
|
|
if hasattr(self, 'command_name'):
|
|
return self.command_name
|
|
else:
|
|
return self.__class__.__name__
|
|
|
|
def set_undefined_options(self, src_cmd, *option_pairs):
|
|
"""Set the values of any "undefined" options from corresponding
|
|
option values in some other command object. "Undefined" here means
|
|
"is None", which is the convention used to indicate that an option
|
|
has not been changed between 'initialize_options()' and
|
|
'finalize_options()'. Usually called from 'finalize_options()' for
|
|
options that depend on some other command rather than another
|
|
option of the same command. 'src_cmd' is the other command from
|
|
which option values will be taken (a command object will be created
|
|
for it if necessary); the remaining arguments are
|
|
'(src_option,dst_option)' tuples which mean "take the value of
|
|
'src_option' in the 'src_cmd' command object, and copy it to
|
|
'dst_option' in the current command object".
|
|
"""
|
|
# Option_pairs: list of (src_option, dst_option) tuples
|
|
src_cmd_obj = self.distribution.get_command_obj(src_cmd)
|
|
src_cmd_obj.ensure_finalized()
|
|
for (src_option, dst_option) in option_pairs:
|
|
if getattr(self, dst_option) is None:
|
|
setattr(self, dst_option, getattr(src_cmd_obj, src_option))
|
|
|
|
def get_finalized_command(self, command, create=1):
|
|
"""Wrapper around Distribution's 'get_command_obj()' method: find
|
|
(create if necessary and 'create' is true) the command object for
|
|
'command', call its 'ensure_finalized()' method, and return the
|
|
finalized command object.
|
|
"""
|
|
cmd_obj = self.distribution.get_command_obj(command, create)
|
|
cmd_obj.ensure_finalized()
|
|
return cmd_obj
|
|
|
|
# XXX rename to 'get_reinitialized_command()'? (should do the
|
|
# same in dist.py, if so)
|
|
def reinitialize_command(self, command, reinit_subcommands=0):
|
|
return self.distribution.reinitialize_command(command,
|
|
reinit_subcommands)
|
|
|
|
def run_command(self, command):
|
|
"""Run some other command: uses the 'run_command()' method of
|
|
Distribution, which creates and finalizes the command object if
|
|
necessary and then invokes its 'run()' method.
|
|
"""
|
|
self.distribution.run_command(command)
|
|
|
|
def get_sub_commands(self):
|
|
"""Determine the sub-commands that are relevant in the current
|
|
distribution (ie., that need to be run). This is based on the
|
|
'sub_commands' class attribute: each tuple in that list may include
|
|
a method that we call to determine if the subcommand needs to be
|
|
run for the current distribution. Return a list of command names.
|
|
"""
|
|
commands = []
|
|
for (cmd_name, method) in self.sub_commands:
|
|
if method is None or method(self):
|
|
commands.append(cmd_name)
|
|
return commands
|
|
|
|
|
|
# -- External world manipulation -----------------------------------
|
|
|
|
def warn(self, msg):
|
|
log.warn("warning: %s: %s\n", self.get_command_name(), msg)
|
|
|
|
def execute(self, func, args, msg=None, level=1):
|
|
util.execute(func, args, msg, dry_run=self.dry_run)
|
|
|
|
def mkpath(self, name, mode=0o777):
|
|
dir_util.mkpath(name, mode, dry_run=self.dry_run)
|
|
|
|
def copy_file(self, infile, outfile, preserve_mode=1, preserve_times=1,
|
|
link=None, level=1):
|
|
"""Copy a file respecting verbose, dry-run and force flags. (The
|
|
former two default to whatever is in the Distribution object, and
|
|
the latter defaults to false for commands that don't define it.)"""
|
|
return file_util.copy_file(infile, outfile, preserve_mode,
|
|
preserve_times, not self.force, link,
|
|
dry_run=self.dry_run)
|
|
|
|
def copy_tree(self, infile, outfile, preserve_mode=1, preserve_times=1,
|
|
preserve_symlinks=0, level=1):
|
|
"""Copy an entire directory tree respecting verbose, dry-run,
|
|
and force flags.
|
|
"""
|
|
return dir_util.copy_tree(infile, outfile, preserve_mode,
|
|
preserve_times, preserve_symlinks,
|
|
not self.force, dry_run=self.dry_run)
|
|
|
|
def move_file (self, src, dst, level=1):
|
|
"""Move a file respecting dry-run flag."""
|
|
return file_util.move_file(src, dst, dry_run=self.dry_run)
|
|
|
|
def spawn(self, cmd, search_path=1, level=1):
|
|
"""Spawn an external command respecting dry-run flag."""
|
|
from distutils.spawn import spawn
|
|
spawn(cmd, search_path, dry_run=self.dry_run)
|
|
|
|
def make_archive(self, base_name, format, root_dir=None, base_dir=None,
|
|
owner=None, group=None):
|
|
return archive_util.make_archive(base_name, format, root_dir, base_dir,
|
|
dry_run=self.dry_run,
|
|
owner=owner, group=group)
|
|
|
|
def make_file(self, infiles, outfile, func, args,
|
|
exec_msg=None, skip_msg=None, level=1):
|
|
"""Special case of 'execute()' for operations that process one or
|
|
more input files and generate one output file. Works just like
|
|
'execute()', except the operation is skipped and a different
|
|
message printed if 'outfile' already exists and is newer than all
|
|
files listed in 'infiles'. If the command defined 'self.force',
|
|
and it is true, then the command is unconditionally run -- does no
|
|
timestamp checks.
|
|
"""
|
|
if skip_msg is None:
|
|
skip_msg = "skipping %s (inputs unchanged)" % outfile
|
|
|
|
# Allow 'infiles' to be a single string
|
|
if isinstance(infiles, str):
|
|
infiles = (infiles,)
|
|
elif not isinstance(infiles, (list, tuple)):
|
|
raise TypeError(
|
|
"'infiles' must be a string, or a list or tuple of strings")
|
|
|
|
if exec_msg is None:
|
|
exec_msg = "generating %s from %s" % (outfile, ', '.join(infiles))
|
|
|
|
# If 'outfile' must be regenerated (either because it doesn't
|
|
# exist, is out-of-date, or the 'force' flag is true) then
|
|
# perform the action that presumably regenerates it
|
|
if self.force or dep_util.newer_group(infiles, outfile):
|
|
self.execute(func, args, exec_msg, level)
|
|
# Otherwise, print the "skip" message
|
|
else:
|
|
log.debug(skip_msg)
|