417 lines
17 KiB
Python
417 lines
17 KiB
Python
"""distutils.command.build_py
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Implements the Distutils 'build_py' command."""
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import os
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import importlib.util
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import sys
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import glob
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from distutils.core import Command
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from distutils.errors import *
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from distutils.util import convert_path, Mixin2to3
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from distutils import log
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class build_py (Command):
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description = "\"build\" pure Python modules (copy to build directory)"
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user_options = [
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('build-lib=', 'd', "directory to \"build\" (copy) to"),
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('compile', 'c', "compile .py to .pyc"),
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('no-compile', None, "don't compile .py files [default]"),
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('optimize=', 'O',
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"also compile with optimization: -O1 for \"python -O\", "
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"-O2 for \"python -OO\", and -O0 to disable [default: -O0]"),
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('force', 'f', "forcibly build everything (ignore file timestamps)"),
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]
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boolean_options = ['compile', 'force']
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negative_opt = {'no-compile' : 'compile'}
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def initialize_options(self):
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self.build_lib = None
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self.py_modules = None
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self.package = None
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self.package_data = None
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self.package_dir = None
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self.compile = 0
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self.optimize = 0
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self.force = None
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def finalize_options(self):
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self.set_undefined_options('build',
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('build_lib', 'build_lib'),
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('force', 'force'))
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# Get the distribution options that are aliases for build_py
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# options -- list of packages and list of modules.
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self.packages = self.distribution.packages
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self.py_modules = self.distribution.py_modules
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self.package_data = self.distribution.package_data
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self.package_dir = {}
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if self.distribution.package_dir:
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for name, path in self.distribution.package_dir.items():
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self.package_dir[name] = convert_path(path)
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self.data_files = self.get_data_files()
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# Ick, copied straight from install_lib.py (fancy_getopt needs a
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# type system! Hell, *everything* needs a type system!!!)
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if not isinstance(self.optimize, int):
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try:
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self.optimize = int(self.optimize)
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assert 0 <= self.optimize <= 2
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except (ValueError, AssertionError):
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raise DistutilsOptionError("optimize must be 0, 1, or 2")
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def run(self):
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# XXX copy_file by default preserves atime and mtime. IMHO this is
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# the right thing to do, but perhaps it should be an option -- in
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# particular, a site administrator might want installed files to
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# reflect the time of installation rather than the last
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# modification time before the installed release.
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# XXX copy_file by default preserves mode, which appears to be the
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# wrong thing to do: if a file is read-only in the working
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# directory, we want it to be installed read/write so that the next
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# installation of the same module distribution can overwrite it
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# without problems. (This might be a Unix-specific issue.) Thus
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# we turn off 'preserve_mode' when copying to the build directory,
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# since the build directory is supposed to be exactly what the
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# installation will look like (ie. we preserve mode when
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# installing).
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# Two options control which modules will be installed: 'packages'
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# and 'py_modules'. The former lets us work with whole packages, not
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# specifying individual modules at all; the latter is for
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# specifying modules one-at-a-time.
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if self.py_modules:
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self.build_modules()
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if self.packages:
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self.build_packages()
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self.build_package_data()
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self.byte_compile(self.get_outputs(include_bytecode=0))
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def get_data_files(self):
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"""Generate list of '(package,src_dir,build_dir,filenames)' tuples"""
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data = []
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if not self.packages:
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return data
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for package in self.packages:
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# Locate package source directory
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src_dir = self.get_package_dir(package)
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# Compute package build directory
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build_dir = os.path.join(*([self.build_lib] + package.split('.')))
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# Length of path to strip from found files
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plen = 0
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if src_dir:
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plen = len(src_dir)+1
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# Strip directory from globbed filenames
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filenames = [
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file[plen:] for file in self.find_data_files(package, src_dir)
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]
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data.append((package, src_dir, build_dir, filenames))
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return data
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def find_data_files(self, package, src_dir):
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"""Return filenames for package's data files in 'src_dir'"""
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globs = (self.package_data.get('', [])
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+ self.package_data.get(package, []))
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files = []
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for pattern in globs:
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# Each pattern has to be converted to a platform-specific path
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filelist = glob.glob(os.path.join(glob.escape(src_dir), convert_path(pattern)))
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# Files that match more than one pattern are only added once
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files.extend([fn for fn in filelist if fn not in files
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and os.path.isfile(fn)])
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return files
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def build_package_data(self):
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"""Copy data files into build directory"""
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lastdir = None
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for package, src_dir, build_dir, filenames in self.data_files:
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for filename in filenames:
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target = os.path.join(build_dir, filename)
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self.mkpath(os.path.dirname(target))
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self.copy_file(os.path.join(src_dir, filename), target,
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preserve_mode=False)
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def get_package_dir(self, package):
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"""Return the directory, relative to the top of the source
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distribution, where package 'package' should be found
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(at least according to the 'package_dir' option, if any)."""
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path = package.split('.')
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if not self.package_dir:
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if path:
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return os.path.join(*path)
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else:
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return ''
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else:
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tail = []
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while path:
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try:
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pdir = self.package_dir['.'.join(path)]
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except KeyError:
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tail.insert(0, path[-1])
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del path[-1]
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else:
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tail.insert(0, pdir)
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return os.path.join(*tail)
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else:
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# Oops, got all the way through 'path' without finding a
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# match in package_dir. If package_dir defines a directory
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# for the root (nameless) package, then fallback on it;
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# otherwise, we might as well have not consulted
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# package_dir at all, as we just use the directory implied
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# by 'tail' (which should be the same as the original value
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# of 'path' at this point).
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pdir = self.package_dir.get('')
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if pdir is not None:
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tail.insert(0, pdir)
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if tail:
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return os.path.join(*tail)
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else:
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return ''
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def check_package(self, package, package_dir):
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# Empty dir name means current directory, which we can probably
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# assume exists. Also, os.path.exists and isdir don't know about
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# my "empty string means current dir" convention, so we have to
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# circumvent them.
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if package_dir != "":
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if not os.path.exists(package_dir):
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raise DistutilsFileError(
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"package directory '%s' does not exist" % package_dir)
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if not os.path.isdir(package_dir):
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raise DistutilsFileError(
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"supposed package directory '%s' exists, "
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"but is not a directory" % package_dir)
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# Require __init__.py for all but the "root package"
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if package:
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init_py = os.path.join(package_dir, "__init__.py")
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if os.path.isfile(init_py):
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return init_py
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else:
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log.warn(("package init file '%s' not found " +
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"(or not a regular file)"), init_py)
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# Either not in a package at all (__init__.py not expected), or
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# __init__.py doesn't exist -- so don't return the filename.
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return None
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def check_module(self, module, module_file):
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if not os.path.isfile(module_file):
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log.warn("file %s (for module %s) not found", module_file, module)
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return False
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else:
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return True
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def find_package_modules(self, package, package_dir):
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self.check_package(package, package_dir)
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module_files = glob.glob(os.path.join(glob.escape(package_dir), "*.py"))
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modules = []
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setup_script = os.path.abspath(self.distribution.script_name)
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for f in module_files:
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abs_f = os.path.abspath(f)
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if abs_f != setup_script:
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module = os.path.splitext(os.path.basename(f))[0]
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modules.append((package, module, f))
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else:
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self.debug_print("excluding %s" % setup_script)
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return modules
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def find_modules(self):
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"""Finds individually-specified Python modules, ie. those listed by
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module name in 'self.py_modules'. Returns a list of tuples (package,
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module_base, filename): 'package' is a tuple of the path through
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package-space to the module; 'module_base' is the bare (no
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packages, no dots) module name, and 'filename' is the path to the
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".py" file (relative to the distribution root) that implements the
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module.
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"""
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# Map package names to tuples of useful info about the package:
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# (package_dir, checked)
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# package_dir - the directory where we'll find source files for
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# this package
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# checked - true if we have checked that the package directory
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# is valid (exists, contains __init__.py, ... ?)
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packages = {}
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# List of (package, module, filename) tuples to return
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modules = []
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# We treat modules-in-packages almost the same as toplevel modules,
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# just the "package" for a toplevel is empty (either an empty
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# string or empty list, depending on context). Differences:
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# - don't check for __init__.py in directory for empty package
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for module in self.py_modules:
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path = module.split('.')
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package = '.'.join(path[0:-1])
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module_base = path[-1]
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try:
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(package_dir, checked) = packages[package]
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except KeyError:
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package_dir = self.get_package_dir(package)
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checked = 0
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if not checked:
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init_py = self.check_package(package, package_dir)
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packages[package] = (package_dir, 1)
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if init_py:
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modules.append((package, "__init__", init_py))
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# XXX perhaps we should also check for just .pyc files
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# (so greedy closed-source bastards can distribute Python
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# modules too)
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module_file = os.path.join(package_dir, module_base + ".py")
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if not self.check_module(module, module_file):
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continue
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modules.append((package, module_base, module_file))
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return modules
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def find_all_modules(self):
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"""Compute the list of all modules that will be built, whether
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they are specified one-module-at-a-time ('self.py_modules') or
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by whole packages ('self.packages'). Return a list of tuples
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(package, module, module_file), just like 'find_modules()' and
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'find_package_modules()' do."""
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modules = []
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if self.py_modules:
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modules.extend(self.find_modules())
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if self.packages:
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for package in self.packages:
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package_dir = self.get_package_dir(package)
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m = self.find_package_modules(package, package_dir)
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modules.extend(m)
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return modules
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def get_source_files(self):
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return [module[-1] for module in self.find_all_modules()]
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def get_module_outfile(self, build_dir, package, module):
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outfile_path = [build_dir] + list(package) + [module + ".py"]
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return os.path.join(*outfile_path)
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def get_outputs(self, include_bytecode=1):
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modules = self.find_all_modules()
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outputs = []
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for (package, module, module_file) in modules:
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package = package.split('.')
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filename = self.get_module_outfile(self.build_lib, package, module)
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outputs.append(filename)
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if include_bytecode:
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if self.compile:
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outputs.append(importlib.util.cache_from_source(
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filename, optimization=''))
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if self.optimize > 0:
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outputs.append(importlib.util.cache_from_source(
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filename, optimization=self.optimize))
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outputs += [
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os.path.join(build_dir, filename)
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for package, src_dir, build_dir, filenames in self.data_files
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for filename in filenames
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]
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return outputs
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def build_module(self, module, module_file, package):
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if isinstance(package, str):
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package = package.split('.')
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elif not isinstance(package, (list, tuple)):
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raise TypeError(
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"'package' must be a string (dot-separated), list, or tuple")
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# Now put the module source file into the "build" area -- this is
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# easy, we just copy it somewhere under self.build_lib (the build
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# directory for Python source).
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outfile = self.get_module_outfile(self.build_lib, package, module)
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dir = os.path.dirname(outfile)
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self.mkpath(dir)
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return self.copy_file(module_file, outfile, preserve_mode=0)
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def build_modules(self):
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modules = self.find_modules()
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for (package, module, module_file) in modules:
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# Now "build" the module -- ie. copy the source file to
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# self.build_lib (the build directory for Python source).
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# (Actually, it gets copied to the directory for this package
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# under self.build_lib.)
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self.build_module(module, module_file, package)
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def build_packages(self):
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for package in self.packages:
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# Get list of (package, module, module_file) tuples based on
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# scanning the package directory. 'package' is only included
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# in the tuple so that 'find_modules()' and
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# 'find_package_tuples()' have a consistent interface; it's
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# ignored here (apart from a sanity check). Also, 'module' is
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# the *unqualified* module name (ie. no dots, no package -- we
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# already know its package!), and 'module_file' is the path to
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# the .py file, relative to the current directory
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# (ie. including 'package_dir').
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package_dir = self.get_package_dir(package)
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modules = self.find_package_modules(package, package_dir)
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# Now loop over the modules we found, "building" each one (just
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# copy it to self.build_lib).
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for (package_, module, module_file) in modules:
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assert package == package_
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self.build_module(module, module_file, package)
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def byte_compile(self, files):
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if sys.dont_write_bytecode:
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self.warn('byte-compiling is disabled, skipping.')
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return
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from distutils.util import byte_compile
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prefix = self.build_lib
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if prefix[-1] != os.sep:
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prefix = prefix + os.sep
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# XXX this code is essentially the same as the 'byte_compile()
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# method of the "install_lib" command, except for the determination
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# of the 'prefix' string. Hmmm.
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if self.compile:
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byte_compile(files, optimize=0,
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force=self.force, prefix=prefix, dry_run=self.dry_run)
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if self.optimize > 0:
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byte_compile(files, optimize=self.optimize,
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force=self.force, prefix=prefix, dry_run=self.dry_run)
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class build_py_2to3(build_py, Mixin2to3):
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def run(self):
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self.updated_files = []
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# Base class code
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if self.py_modules:
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self.build_modules()
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if self.packages:
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self.build_packages()
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self.build_package_data()
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# 2to3
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self.run_2to3(self.updated_files)
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# Remaining base class code
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self.byte_compile(self.get_outputs(include_bytecode=0))
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def build_module(self, module, module_file, package):
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res = build_py.build_module(self, module, module_file, package)
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if res[1]:
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# file was copied
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self.updated_files.append(res[0])
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return res
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