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
__rcsid__ = "$Id$"
import string, os
from types import *
from glob import glob
from distutils.core import Command
from distutils.errors import *
1999-10-03 18:07:21 -03:00
from distutils.util import mkpath, copy_file
class BuildPy (Command):
options = [('build-dir=', 'd', "directory for platform-shared files"),
]
def set_default_options (self):
self.build_dir = None
self.modules = None
self.package = None
self.package_dir = None
def set_final_options (self):
self.set_undefined_options ('build',
('build_lib', 'build_dir'))
# Get the distribution options that are aliases for build_py
# options -- list of packages and list of modules.
self.packages = self.distribution.packages
self.modules = self.distribution.py_modules
self.package_dir = self.distribution.package_dir
def run (self):
# XXX copy_file by default preserves all stat info -- mode, 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 does *not* preserve MacOS-specific file metadata.
# If this is a problem for building/installing Python modules, then
# we'll have to fix copy_file. (And what about installing scripts,
# when the time comes for that -- does MacOS use its special
# metadata to know that a file is meant to be interpreted by
# Python?)
infiles = []
outfiles = []
missing = []
# Two options control which modules will be installed: 'packages'
# and '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 'modules' options.
if not self.modules and not self.packages:
return
if self.modules and self.packages:
raise DistutilsOptionError, \
"build_py: supplying both 'packages' and 'modules' " + \
"options not allowed"
# Now we're down to two cases: 'modules' only and 'packages' only.
if self.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 (path)
else:
raise TypeError, "'package' must be a string, list, or tuple"
if not self.package_dir:
return apply (os.path.join, path)
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:
# arg! everything failed, we might as well have not even
# looked in package_dir -- oh well
return apply (os.path.join, tail)
# 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):
raise DistutilsFileErorr, \
("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 not os.path.isfile (init_py):
self.warn (("package init file '%s' not found " +
"(or not a regular file)") % init_py)
# 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):
module_files = glob (os.path.join (package_dir, "*.py"))
module_pairs = []
for f in module_files:
module = os.path.splitext (os.path.basename (f))[0]
module_pairs.append (module, f)
return module_pairs
def find_modules (self):
# 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 (module, package, 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.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:
self.check_package (package, package_dir)
packages[package] = (package_dir, 1)
# 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 ((module, package, module_file))
return modules
# find_modules ()
def get_source_files (self):
if self.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)
# Both find_modules() and find_package_modules() return a list of
# tuples where the last element of each tuple is the filename --
# what a happy coincidence!
filenames = []
for module in modules:
filenames.append (module[-1])
return filenames
def build_module (self, module, module_file, package):
if type (package) is StringType:
package = string.split (package, '.')
# Now put the module source file into the "build" area -- this is
# easy, we just copy it somewhere under self.build_dir (the build
# directory for Python source).
outfile_path = package
outfile_path.append (module + ".py")
outfile_path.insert (0, self.build_dir)
outfile = apply (os.path.join, outfile_path)
dir = os.path.dirname (outfile)
self.mkpath (dir)
self.copy_file (module_file, outfile)
def build_modules (self):
modules = self.find_modules()
for (module, package, module_file) in modules:
# Now "build" the module -- ie. copy the source file to
# self.build_dir (the build directory for Python source).
# (Actually, it gets copied to the directory for this package
# under self.build_dir.)
self.build_module (module, module_file, package)
# build_modules ()
def build_packages (self):
for package in self.packages:
package_dir = self.get_package_dir (package)
self.check_package (package, package_dir)
# Get list of (module, module_file) tuples based on scanning
# the package directory. Here, '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').
modules = self.find_package_modules (package, package_dir)
# Now loop over the modules we found, "building" each one (just
# copy it to self.build_dir).
for (module, module_file) in modules:
self.build_module (module, module_file, package)
# build_packages ()
# end class BuildPy