cpython/Lib/distutils/command/build_py.py

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"""distutils.command.build_py
Implements the Distutils 'build_py' command."""
# created 1999/03/08, Greg Ward
2000-03-01 21:49:45 -04:00
__revision__ = "$Id$"
import sys, string, os
from types import *
from glob import glob
from distutils.core import Command
from distutils.errors import *
class build_py (Command):
description = "\"build\" pure Python modules (copy to build directory)"
user_options = [
('build-lib=', 'd', "directory to \"build\" (copy) to"),
('force', 'f', "forcibly build everything (ignore file timestamps"),
]
def initialize_options (self):
self.build_lib = None
self.py_modules = None
self.package = None
self.package_dir = None
self.force = None
def finalize_options (self):
self.set_undefined_options ('build',
('build_lib', 'build_lib'),
('force', 'force'))
# Get the distribution options that are aliases for build_py
# options -- list of packages and list of modules.
self.packages = self.distribution.packages
self.py_modules = self.distribution.py_modules
self.package_dir = self.distribution.package_dir
def run (self):
# XXX copy_file by default preserves atime and mtime. IMHO this is
# the right thing to do, but perhaps it should be an option -- in
# particular, a site administrator might want installed files to
# reflect the time of installation rather than the last
# modification time before the installed release.
# XXX copy_file by default preserves mode, which appears to be the
# wrong thing to do: if a file is read-only in the working
# directory, we want it to be installed read/write so that the next
# installation of the same module distribution can overwrite it
# without problems. (This might be a Unix-specific issue.) Thus
# we turn off 'preserve_mode' when copying to the build directory,
# since the build directory is supposed to be exactly what the
# installation will look like (ie. we preserve mode when
# installing).
# Two options control which modules will be installed: 'packages'
# and 'py_modules'. The former lets us work with whole packages, not
# specifying individual modules at all; the latter is for
# specifying modules one-at-a-time. Currently they are mutually
# exclusive: you can define one or the other (or neither), but not
# both. It remains to be seen how limiting this is.
# Dispose of the two "unusual" cases first: no pure Python modules
# at all (no problem, just return silently), and over-specified
# 'packages' and 'py_modules' options.
if not self.py_modules and not self.packages:
return
if self.py_modules and self.packages:
raise DistutilsOptionError, \
"build_py: supplying both 'packages' and 'py_modules' " + \
"options is not allowed"
# Now we're down to two cases: 'py_modules' only and 'packages' only.
if self.py_modules:
self.build_modules ()
else:
self.build_packages ()
# run ()
def get_package_dir (self, package):
"""Return the directory, relative to the top of the source
distribution, where package 'package' should be found
(at least according to the 'package_dir' option, if any)."""
if type (package) is StringType:
path = string.split (package, '.')
elif type (package) in (TupleType, ListType):
path = list (package)
else:
raise TypeError, "'package' must be a string, list, or tuple"
if not self.package_dir:
if path:
return apply (os.path.join, path)
else:
return ''
else:
tail = []
while path:
try:
pdir = self.package_dir[string.join (path, '.')]
except KeyError:
tail.insert (0, path[-1])
del path[-1]
else:
tail.insert (0, pdir)
return apply (os.path.join, tail)
else:
# Oops, got all the way through 'path' without finding a
# match in package_dir. If package_dir defines a directory
# for the root (nameless) package, then fallback on it;
# otherwise, we might as well have not consulted
# package_dir at all, as we just use the directory implied
# by 'tail' (which should be the same as the original value
# of 'path' at this point).
pdir = self.package_dir.get('')
if pdir is not None:
tail.insert(0, pdir)
if tail:
return apply (os.path.join, tail)
else:
return ''
# get_package_dir ()
def check_package (self, package, package_dir):
# Empty dir name means current directory, which we can probably
# assume exists. Also, os.path.exists and isdir don't know about
# my "empty string means current dir" convention, so we have to
# circumvent them.
if package_dir != "":
if not os.path.exists (package_dir):
raise DistutilsFileError, \
"package directory '%s' does not exist" % package_dir
if not os.path.isdir (package_dir):
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raise DistutilsFileError, \
("supposed package directory '%s' exists, " +
"but is not a directory") % package_dir
# Require __init__.py for all but the "root package"
if package:
init_py = os.path.join (package_dir, "__init__.py")
if os.path.isfile (init_py):
return init_py
else:
self.warn (("package init file '%s' not found " +
"(or not a regular file)") % init_py)
# Either not in a package at all (__init__.py not expected), or
# __init__.py doesn't exist -- so don't return the filename.
return
# check_package ()
def check_module (self, module, module_file):
if not os.path.isfile (module_file):
self.warn ("file %s (for module %s) not found" %
(module_file, module))
return 0
else:
return 1
# check_module ()
def find_package_modules (self, package, package_dir):
self.check_package (package, package_dir)
module_files = glob (os.path.join (package_dir, "*.py"))
modules = []
setup_script = os.path.abspath (sys.argv[0])
for f in module_files:
abs_f = os.path.abspath (f)
if abs_f != setup_script:
module = os.path.splitext (os.path.basename (f))[0]
modules.append ((package, module, f))
return modules
def find_modules (self):
"""Finds individually-specified Python modules, ie. those listed by
module name in 'self.py_modules'. Returns a list of tuples (package,
module_base, filename): 'package' is a tuple of the path through
package-space to the module; 'module_base' is the bare (no
packages, no dots) module name, and 'filename' is the path to the
".py" file (relative to the distribution root) that implements the
module.
"""
# Map package names to tuples of useful info about the package:
# (package_dir, checked)
# package_dir - the directory where we'll find source files for
# this package
# checked - true if we have checked that the package directory
# is valid (exists, contains __init__.py, ... ?)
packages = {}
# List of (package, module, filename) tuples to return
modules = []
# We treat modules-in-packages almost the same as toplevel modules,
# just the "package" for a toplevel is empty (either an empty
# string or empty list, depending on context). Differences:
# - don't check for __init__.py in directory for empty package
for module in self.py_modules:
path = string.split (module, '.')
package = tuple (path[0:-1])
module_base = path[-1]
try:
(package_dir, checked) = packages[package]
except KeyError:
package_dir = self.get_package_dir (package)
checked = 0
if not checked:
init_py = self.check_package (package, package_dir)
packages[package] = (package_dir, 1)
if init_py:
modules.append((package, "__init__", init_py))
# XXX perhaps we should also check for just .pyc files
# (so greedy closed-source bastards can distribute Python
# modules too)
module_file = os.path.join (package_dir, module_base + ".py")
if not self.check_module (module, module_file):
continue
modules.append ((package, module_base, module_file))
return modules
# find_modules ()
def find_all_modules (self):
"""Compute the list of all modules that will be built, whether
they are specified one-module-at-a-time ('self.py_modules') or
by whole packages ('self.packages'). Return a list of tuples
(package, module, module_file), just like 'find_modules()' and
'find_package_modules()' do."""
if self.py_modules:
modules = self.find_modules ()
else:
modules = []
for package in self.packages:
package_dir = self.get_package_dir (package)
m = self.find_package_modules (package, package_dir)
modules.extend (m)
return modules
# find_all_modules ()
def get_source_files (self):
modules = self.find_all_modules ()
filenames = []
for module in modules:
filenames.append (module[-1])
return filenames
def get_module_outfile (self, build_dir, package, module):
outfile_path = [build_dir] + list(package) + [module + ".py"]
return apply (os.path.join, outfile_path)
def get_outputs (self):
modules = self.find_all_modules ()
outputs = []
for (package, module, module_file) in modules:
package = string.split (package, '.')
outputs.append (self.get_module_outfile (self.build_lib,
package, module))
return outputs
def build_module (self, module, module_file, package):
if type (package) is StringType:
package = string.split (package, '.')
elif type (package) not in (ListType, TupleType):
raise TypeError, \
"'package' must be a string (dot-separated), list, or tuple"
# Now put the module source file into the "build" area -- this is
# easy, we just copy it somewhere under self.build_lib (the build
# directory for Python source).
outfile = self.get_module_outfile (self.build_lib, package, module)
dir = os.path.dirname (outfile)
self.mkpath (dir)
self.copy_file (module_file, outfile, preserve_mode=0)
def build_modules (self):
modules = self.find_modules()
for (package, module, module_file) in modules:
# Now "build" the module -- ie. copy the source file to
# self.build_lib (the build directory for Python source).
# (Actually, it gets copied to the directory for this package
# under self.build_lib.)
self.build_module (module, module_file, package)
# build_modules ()
def build_packages (self):
for package in self.packages:
# Get list of (package, module, module_file) tuples based on
# scanning the package directory. 'package' is only included
# in the tuple so that 'find_modules()' and
# 'find_package_tuples()' have a consistent interface; it's
# ignored here (apart from a sanity check). Also, 'module' is
# the *unqualified* module name (ie. no dots, no package -- we
# already know its package!), and 'module_file' is the path to
# the .py file, relative to the current directory
# (ie. including 'package_dir').
package_dir = self.get_package_dir (package)
modules = self.find_package_modules (package, package_dir)
# Now loop over the modules we found, "building" each one (just
# copy it to self.build_lib).
for (package_, module, module_file) in modules:
assert package == package_
self.build_module (module, module_file, package)
# build_packages ()
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# class build_py