239 lines
8.2 KiB
Python
239 lines
8.2 KiB
Python
"""distutils.command.install_lib
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Implements the Distutils 'install_lib' command
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(install all Python modules)."""
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import os
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import importlib.util
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import sys
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from distutils.core import Command
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from distutils.errors import DistutilsOptionError
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# Extension for Python source files.
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PYTHON_SOURCE_EXTENSION = ".py"
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class install_lib(Command):
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description = "install all Python modules (extensions and pure Python)"
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# The byte-compilation options are a tad confusing. Here are the
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# possible scenarios:
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# 1) no compilation at all (--no-compile --no-optimize)
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# 2) compile .pyc only (--compile --no-optimize; default)
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# 3) compile .pyc and "opt-1" .pyc (--compile --optimize)
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# 4) compile "opt-1" .pyc only (--no-compile --optimize)
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# 5) compile .pyc and "opt-2" .pyc (--compile --optimize-more)
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# 6) compile "opt-2" .pyc only (--no-compile --optimize-more)
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#
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# The UI for this is two options, 'compile' and 'optimize'.
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# 'compile' is strictly boolean, and only decides whether to
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# generate .pyc files. 'optimize' is three-way (0, 1, or 2), and
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# decides both whether to generate .pyc files and what level of
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# optimization to use.
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user_options = [
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('install-dir=', 'd', "directory to install to"),
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('build-dir=', 'b', "build directory (where to install from)"),
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('force', 'f', "force installation (overwrite existing files)"),
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('compile', 'c', "compile .py to .pyc [default]"),
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('no-compile', None, "don't compile .py files"),
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(
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'optimize=',
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'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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),
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('skip-build', None, "skip the build steps"),
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]
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boolean_options = ['force', 'compile', 'skip-build']
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negative_opt = {'no-compile': 'compile'}
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def initialize_options(self):
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# let the 'install' command dictate our installation directory
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self.install_dir = None
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self.build_dir = None
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self.force = 0
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self.compile = None
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self.optimize = None
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self.skip_build = None
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def finalize_options(self):
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# Get all the information we need to install pure Python modules
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# from the umbrella 'install' command -- build (source) directory,
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# install (target) directory, and whether to compile .py files.
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self.set_undefined_options(
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'install',
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('build_lib', 'build_dir'),
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('install_lib', 'install_dir'),
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('force', 'force'),
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('compile', 'compile'),
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('optimize', 'optimize'),
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('skip_build', 'skip_build'),
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)
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if self.compile is None:
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self.compile = True
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if self.optimize is None:
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self.optimize = False
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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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if self.optimize not in (0, 1, 2):
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raise AssertionError
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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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# Make sure we have built everything we need first
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self.build()
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# Install everything: simply dump the entire contents of the build
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# directory to the installation directory (that's the beauty of
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# having a build directory!)
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outfiles = self.install()
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# (Optionally) compile .py to .pyc
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if outfiles is not None and self.distribution.has_pure_modules():
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self.byte_compile(outfiles)
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# -- Top-level worker functions ------------------------------------
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# (called from 'run()')
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def build(self):
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if not self.skip_build:
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if self.distribution.has_pure_modules():
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self.run_command('build_py')
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if self.distribution.has_ext_modules():
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self.run_command('build_ext')
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def install(self):
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if os.path.isdir(self.build_dir):
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outfiles = self.copy_tree(self.build_dir, self.install_dir)
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else:
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self.warn(
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"'%s' does not exist -- no Python modules to install" % self.build_dir
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)
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return
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return outfiles
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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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# Get the "--root" directory supplied to the "install" command,
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# and use it as a prefix to strip off the purported filename
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# encoded in bytecode files. This is far from complete, but it
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# should at least generate usable bytecode in RPM distributions.
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install_root = self.get_finalized_command('install').root
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if self.compile:
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byte_compile(
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files,
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optimize=0,
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force=self.force,
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prefix=install_root,
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dry_run=self.dry_run,
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)
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if self.optimize > 0:
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byte_compile(
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files,
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optimize=self.optimize,
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force=self.force,
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prefix=install_root,
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verbose=self.verbose,
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dry_run=self.dry_run,
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)
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# -- Utility methods -----------------------------------------------
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def _mutate_outputs(self, has_any, build_cmd, cmd_option, output_dir):
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if not has_any:
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return []
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build_cmd = self.get_finalized_command(build_cmd)
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build_files = build_cmd.get_outputs()
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build_dir = getattr(build_cmd, cmd_option)
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prefix_len = len(build_dir) + len(os.sep)
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outputs = []
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for file in build_files:
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outputs.append(os.path.join(output_dir, file[prefix_len:]))
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return outputs
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def _bytecode_filenames(self, py_filenames):
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bytecode_files = []
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for py_file in py_filenames:
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# Since build_py handles package data installation, the
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# list of outputs can contain more than just .py files.
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# Make sure we only report bytecode for the .py files.
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ext = os.path.splitext(os.path.normcase(py_file))[1]
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if ext != PYTHON_SOURCE_EXTENSION:
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continue
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if self.compile:
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bytecode_files.append(
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importlib.util.cache_from_source(py_file, optimization='')
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)
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if self.optimize > 0:
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bytecode_files.append(
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importlib.util.cache_from_source(
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py_file, optimization=self.optimize
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)
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)
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return bytecode_files
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# -- External interface --------------------------------------------
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# (called by outsiders)
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def get_outputs(self):
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"""Return the list of files that would be installed if this command
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were actually run. Not affected by the "dry-run" flag or whether
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modules have actually been built yet.
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"""
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pure_outputs = self._mutate_outputs(
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self.distribution.has_pure_modules(),
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'build_py',
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'build_lib',
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self.install_dir,
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)
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if self.compile:
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bytecode_outputs = self._bytecode_filenames(pure_outputs)
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else:
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bytecode_outputs = []
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ext_outputs = self._mutate_outputs(
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self.distribution.has_ext_modules(),
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'build_ext',
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'build_lib',
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self.install_dir,
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)
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return pure_outputs + bytecode_outputs + ext_outputs
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def get_inputs(self):
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"""Get the list of files that are input to this command, ie. the
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files that get installed as they are named in the build tree.
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The files in this list correspond one-to-one to the output
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filenames returned by 'get_outputs()'.
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"""
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inputs = []
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if self.distribution.has_pure_modules():
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build_py = self.get_finalized_command('build_py')
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inputs.extend(build_py.get_outputs())
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if self.distribution.has_ext_modules():
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build_ext = self.get_finalized_command('build_ext')
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inputs.extend(build_ext.get_outputs())
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return inputs
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