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install.py
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"""distutils.command.install Implements the Distutils 'install' command.""" import sys import sysconfig import os import re from distutils import log from distutils.core import Command from distutils.debug import DEBUG from distutils.sysconfig import get_config_vars from distutils.errors import DistutilsPlatformError from distutils.file_util import write_file from distutils.util import convert_path, subst_vars, change_root from distutils.util import get_platform from distutils.errors import DistutilsOptionError from site import USER_BASE from site import USER_SITE HAS_USER_SITE = (USER_SITE is not None) # The keys to an installation scheme; if any new types of files are to be # installed, be sure to add an entry to every scheme in # sysconfig._INSTALL_SCHEMES, and to SCHEME_KEYS here. SCHEME_KEYS = ('purelib', 'platlib', 'headers', 'scripts', 'data') # The following code provides backward-compatible INSTALL_SCHEMES # while making the sysconfig module the single point of truth. # This makes it easier for OS distributions where they need to # alter locations for packages installations in a single place. # Note that this module is deprecated (PEP 632); all consumers # of this information should switch to using sysconfig directly. INSTALL_SCHEMES = {"unix_prefix": {}, "unix_home": {}, "nt": {}} # Copy from sysconfig._INSTALL_SCHEMES for key in SCHEME_KEYS: for distutils_scheme_name, sys_scheme_name in ( ("unix_prefix", "posix_prefix"), ("unix_home", "posix_home"), ("nt", "nt")): sys_key = key sys_scheme = sysconfig._INSTALL_SCHEMES[sys_scheme_name] if key == "headers" and key not in sys_scheme: # On POSIX-y platforms, Python will: # - Build from .h files in 'headers' (only there when # building CPython) # - Install .h files to 'include' # When 'headers' is missing, fall back to 'include' sys_key = 'include' INSTALL_SCHEMES[distutils_scheme_name][key] = sys_scheme[sys_key] # Transformation to different template format for main_key in INSTALL_SCHEMES: for key, value in INSTALL_SCHEMES[main_key].items(): # Change all ocurences of {variable} to $variable value = re.sub(r"\{(.+?)\}", r"$\g<1>", value) value = value.replace("$installed_base", "$base") value = value.replace("$py_version_nodot_plat", "$py_version_nodot") if key == "headers": value += "/$dist_name" if sys.version_info >= (3, 9) and key == "platlib": # platlibdir is available since 3.9: bpo-1294959 value = value.replace("/lib/", "/$platlibdir/") INSTALL_SCHEMES[main_key][key] = value # The following part of INSTALL_SCHEMES has a different definition # than the one in sysconfig, but because both depend on the site module, # the outcomes should be the same. if HAS_USER_SITE: INSTALL_SCHEMES['nt_user'] = { 'purelib': '$usersite', 'platlib': '$usersite', 'headers': '$userbase/Python$py_version_nodot/Include/$dist_name', 'scripts': '$userbase/Python$py_version_nodot/Scripts', 'data' : '$userbase', } INSTALL_SCHEMES['unix_user'] = { 'purelib': '$usersite', 'platlib': '$usersite', 'headers': '$userbase/include/python$py_version_short$abiflags/$dist_name', 'scripts': '$userbase/bin', 'data' : '$userbase', } class install(Command): description = "install everything from build directory" user_options = [ # Select installation scheme and set base director(y|ies) ('prefix=', None, "installation prefix"), ('exec-prefix=', None, "(Unix only) prefix for platform-specific files"), ('home=', None, "(Unix only) home directory to install under"), # Or, just set the base director(y|ies) ('install-base=', None, "base installation directory (instead of --prefix or --home)"), ('install-platbase=', None, "base installation directory for platform-specific files " + "(instead of --exec-prefix or --home)"), ('root=', None, "install everything relative to this alternate root directory"), # Or, explicitly set the installation scheme ('install-purelib=', None, "installation directory for pure Python module distributions"), ('install-platlib=', None, "installation directory for non-pure module distributions"), ('install-lib=', None, "installation directory for all module distributions " + "(overrides --install-purelib and --install-platlib)"), ('install-headers=', None, "installation directory for C/C++ headers"), ('install-scripts=', None, "installation directory for Python scripts"), ('install-data=', None, "installation directory for data files"), # Byte-compilation options -- see install_lib.py for details, as # these are duplicated from there (but only install_lib does # anything with them). ('compile', 'c', "compile .py to .pyc [default]"), ('no-compile', None, "don't compile .py files"), ('optimize=', 'O', "also compile with optimization: -O1 for \"python -O\", " "-O2 for \"python -OO\", and -O0 to disable [default: -O0]"), # Miscellaneous control options ('force', 'f', "force installation (overwrite any existing files)"), ('skip-build', None, "skip rebuilding everything (for testing/debugging)"), # Where to install documentation (eventually!) #('doc-format=', None, "format of documentation to generate"), #('install-man=', None, "directory for Unix man pages"), #('install-html=', None, "directory for HTML documentation"), #('install-info=', None, "directory for GNU info files"), ('record=', None, "filename in which to record list of installed files"), ] boolean_options = ['compile', 'force', 'skip-build'] if HAS_USER_SITE: user_options.append(('user', None, "install in user site-package '%s'" % USER_SITE)) boolean_options.append('user') negative_opt = {'no-compile' : 'compile'} def initialize_options(self): """Initializes options.""" # High-level options: these select both an installation base # and scheme. self.prefix = None self.exec_prefix = None self.home = None self.user = 0 # These select only the installation base; it's up to the user to # specify the installation scheme (currently, that means supplying # the --install-{platlib,purelib,scripts,data} options). self.install_base = None self.install_platbase = None self.root = None # These options are the actual installation directories; if not # supplied by the user, they are filled in using the installation # scheme implied by prefix/exec-prefix/home and the contents of # that installation scheme. self.install_purelib = None # for pure module distributions self.install_platlib = None # non-pure (dists w/ extensions) self.install_headers = None # for C/C++ headers self.install_lib = None # set to either purelib or platlib self.install_scripts = None self.install_data = None if HAS_USER_SITE: self.install_userbase = USER_BASE self.install_usersite = USER_SITE self.compile = None self.optimize = None # Deprecated # These two are for putting non-packagized distributions into their # own directory and creating a .pth file if it makes sense. # 'extra_path' comes from the setup file; 'install_path_file' can # be turned off if it makes no sense to install a .pth file. (But # better to install it uselessly than to guess wrong and not # install it when it's necessary and would be used!) Currently, # 'install_path_file' is always true unless some outsider meddles # with it. self.extra_path = None self.install_path_file = 1 # 'force' forces installation, even if target files are not # out-of-date. 'skip_build' skips running the "build" command, # handy if you know it's not necessary. 'warn_dir' (which is *not* # a user option, it's just there so the bdist_* commands can turn # it off) determines whether we warn about installing to a # directory not in sys.path. self.force = 0 self.skip_build = 0 self.warn_dir = 1 # These are only here as a conduit from the 'build' command to the # 'install_*' commands that do the real work. ('build_base' isn't # actually used anywhere, but it might be useful in future.) They # are not user options, because if the user told the install # command where the build directory is, that wouldn't affect the # build command. self.build_base = None self.build_lib = None # Not defined yet because we don't know anything about # documentation yet. #self.install_man = None #self.install_html = None #self.install_info = None self.record = None # -- Option finalizing methods ------------------------------------- # (This is rather more involved than for most commands, # because this is where the policy for installing third- # party Python modules on various platforms given a wide # array of user input is decided. Yes, it's quite complex!) def finalize_options(self): """Finalizes options.""" # This method (and its helpers, like 'finalize_unix()', # 'finalize_other()', and 'select_scheme()') is where the default # installation directories for modules, extension modules, and # anything else we care to install from a Python module # distribution. Thus, this code makes a pretty important policy # statement about how third-party stuff is added to a Python # installation! Note that the actual work of installation is done # by the relatively simple 'install_*' commands; they just take # their orders from the installation directory options determined # here. # Check for errors/inconsistencies in the options; first, stuff # that's wrong on any platform. if ((self.prefix or self.exec_prefix or self.home) and (self.install_base or self.install_platbase)): raise DistutilsOptionError( "must supply either prefix/exec-prefix/home or " + "install-base/install-platbase -- not both") if self.home and (self.prefix or self.exec_prefix): raise DistutilsOptionError( "must supply either home or prefix/exec-prefix -- not both") if self.user and (self.prefix or self.exec_prefix or self.home or self.install_base or self.install_platbase): raise DistutilsOptionError("can't combine user with prefix, " "exec_prefix/home, or install_(plat)base") # Next, stuff that's wrong (or dubious) only on certain platforms. if os.name != "posix": if self.exec_prefix: self.warn("exec-prefix option ignored on this platform") self.exec_prefix = None # Now the interesting logic -- so interesting that we farm it out # to other methods. The goal of these methods is to set the final # values for the install_{lib,scripts,data,...} options, using as # input a heady brew of prefix, exec_prefix, home, install_base, # install_platbase, user-supplied versions of # install_{purelib,platlib,lib,scripts,data,...}, and the # INSTALL_SCHEME dictionary above. Phew! self.dump_dirs("pre-finalize_{unix,other}") if os.name == 'posix': self.finalize_unix() else: self.finalize_other() self.dump_dirs("post-finalize_{unix,other}()") # Expand configuration variables, tilde, etc. in self.install_base # and self.install_platbase -- that way, we can use $base or # $platbase in the other installation directories and not worry # about needing recursive variable expansion (shudder). py_version = sys.version.split()[0] (prefix, exec_prefix) = get_config_vars('prefix', 'exec_prefix') try: abiflags = sys.abiflags except AttributeError: # sys.abiflags may not be defined on all platforms. abiflags = '' self.config_vars = {'dist_name': self.distribution.get_name(), 'dist_version': self.distribution.get_version(), 'dist_fullname': self.distribution.get_fullname(), 'py_version': py_version, 'py_version_short': '%d.%d' % sys.version_info[:2], 'py_version_nodot': '%d%d' % sys.version_info[:2], 'sys_prefix': prefix, 'prefix': prefix, 'sys_exec_prefix': exec_prefix, 'exec_prefix': exec_prefix, 'abiflags': abiflags, 'platlibdir': sys.platlibdir, } if HAS_USER_SITE: self.config_vars['userbase'] = self.install_userbase self.config_vars['usersite'] = self.install_usersite if sysconfig.is_python_build(True): self.config_vars['srcdir'] = sysconfig.get_config_var('srcdir') self.expand_basedirs() self.dump_dirs("post-expand_basedirs()") # Now define config vars for the base directories so we can expand # everything else. self.config_vars['base'] = self.install_base self.config_vars['platbase'] = self.install_platbase if DEBUG: from pprint import pprint print("config vars:") pprint(self.config_vars) # Expand "~" and configuration variables in the installation # directories. self.expand_dirs() self.dump_dirs("post-expand_dirs()") # Create directories in the home dir: if self.user: self.create_home_path() # Pick the actual directory to install all modules to: either # install_purelib or install_platlib, depending on whether this # module distribution is pure or not. Of course, if the user # already specified install_lib, use their selection. if self.install_lib is None: if self.distribution.ext_modules: # has extensions: non-pure self.install_lib = self.install_platlib else: self.install_lib = self.install_purelib # Convert directories from Unix /-separated syntax to the local # convention. self.convert_paths('lib', 'purelib', 'platlib', 'scripts', 'data', 'headers') if HAS_USER_SITE: self.convert_paths('userbase', 'usersite') # Deprecated # Well, we're not actually fully completely finalized yet: we still # have to deal with 'extra_path', which is the hack for allowing # non-packagized module distributions (hello, Numerical Python!) to # get their own directories. self.handle_extra_path() self.install_libbase = self.install_lib # needed for .pth file self.install_lib = os.path.join(self.install_lib, self.extra_dirs) # If a new root directory was supplied, make all the installation # dirs relative to it. if self.root is not None: self.change_roots('libbase', 'lib', 'purelib', 'platlib', 'scripts', 'data', 'headers') self.dump_dirs("after prepending root") # Find out the build directories, ie. where to install from. self.set_undefined_options('build', ('build_base', 'build_base'), ('build_lib', 'build_lib')) # Punt on doc directories for now -- after all, we're punting on # documentation completely! def dump_dirs(self, msg): """Dumps the list of user options.""" if not DEBUG: return from distutils.fancy_getopt import longopt_xlate log.debug(msg + ":") for opt in self.user_options: opt_name = opt[0] if opt_name[-1] == "=": opt_name = opt_name[0:-1] if opt_name in self.negative_opt: opt_name = self.negative_opt[opt_name] opt_name = opt_name.translate(longopt_xlate) val = not getattr(self, opt_name) else: opt_name = opt_name.translate(longopt_xlate) val = getattr(self, opt_name) log.debug(" %s: %s", opt_name, val) def finalize_unix(self): """Finalizes options for posix platforms.""" if self.install_base is not None or self.install_platbase is not None: if ((self.install_lib is None and self.install_purelib is None and self.install_platlib is None) or self.install_headers is None or self.install_scripts is None or self.install_data is None): raise DistutilsOptionError( "install-base or install-platbase supplied, but " "installation scheme is incomplete") return if self.user: if self.install_userbase is None: raise DistutilsPlatformError( "User base directory is not specified") self.install_base = self.install_platbase = self.install_userbase self.select_scheme("unix_user") elif self.home is not None: self.install_base = self.install_platbase = self.home self.select_scheme("unix_home") else: if self.prefix is None: if self.exec_prefix is not None: raise DistutilsOptionError( "must not supply exec-prefix without prefix") self.prefix = os.path.normpath(sys.prefix) self.exec_prefix = os.path.normpath(sys.exec_prefix) else: if self.exec_prefix is None: self.exec_prefix = self.prefix self.install_base = self.prefix self.install_platbase = self.exec_prefix self.select_scheme("unix_prefix") def finalize_other(self): """Finalizes options for non-posix platforms""" if self.user: if self.install_userbase is None: raise DistutilsPlatformError( "User base directory is not specified") self.install_base = self.install_platbase = self.install_userbase self.select_scheme(os.name + "_user") elif self.home is not None: self.install_base = self.install_platbase = self.home self.select_scheme("unix_home") else: if self.prefix is None: self.prefix = os.path.normpath(sys.prefix) self.install_base = self.install_platbase = self.prefix try: self.select_scheme(os.name) except KeyError: raise DistutilsPlatformError( "I don't know how to install stuff on '%s'" % os.name) def select_scheme(self, name): """Sets the install directories by applying the install schemes.""" # it's the caller's problem if they supply a bad name! scheme = INSTALL_SCHEMES[name] for key in SCHEME_KEYS: attrname = 'install_' + key if getattr(self, attrname) is None: setattr(self, attrname, scheme[key]) def _expand_attrs(self, attrs): for attr in attrs: val = getattr(self, attr) if val is not None: if os.name == 'posix' or os.name == 'nt': val = os.path.expanduser(val) val = subst_vars(val, self.config_vars) setattr(self, attr, val) def expand_basedirs(self): """Calls `os.path.expanduser` on install_base, install_platbase and root.""" self._expand_attrs(['install_base', 'install_platbase', 'root']) def expand_dirs(self): """Calls `os.path.expanduser` on install dirs.""" self._expand_attrs(['install_purelib', 'install_platlib', 'install_lib', 'install_headers', 'install_scripts', 'install_data',]) def convert_paths(self, *names): """Call `convert_path` over `names`.""" for name in names: attr = "install_" + name setattr(self, attr, convert_path(getattr(self, attr))) def handle_extra_path(self): """Set `path_file` and `extra_dirs` using `extra_path`.""" if self.extra_path is None: self.extra_path = self.distribution.extra_path if self.extra_path is not None: log.warn( "Distribution option extra_path is deprecated. " "See issue27919 for details." ) if isinstance(self.extra_path, str): self.extra_path = self.extra_path.split(',') if len(self.extra_path) == 1: path_file = extra_dirs = self.extra_path[0] elif len(self.extra_path) == 2: path_file, extra_dirs = self.extra_path else: raise DistutilsOptionError( "'extra_path' option must be a list, tuple, or " "comma-separated string with 1 or 2 elements") # convert to local form in case Unix notation used (as it # should be in setup scripts) extra_dirs = convert_path(extra_dirs) else: path_file = None extra_dirs = '' # XXX should we warn if path_file and not extra_dirs? (in which # case the path file would be harmless but pointless) self.path_file = path_file self.extra_dirs = extra_dirs def change_roots(self, *names): """Change the install directories pointed by name using root.""" for name in names: attr = "install_" + name setattr(self, attr, change_root(self.root, getattr(self, attr))) def create_home_path(self): """Create directories under ~.""" if not self.user: return home = convert_path(os.path.expanduser("~")) for name, path in self.config_vars.items(): if path.startswith(home) and not os.path.isdir(path): self.debug_print("os.makedirs('%s', 0o700)" % path) os.makedirs(path, 0o700) # -- Command execution methods ------------------------------------- def run(self): """Runs the command.""" # Obviously have to build before we can install if not self.skip_build: self.run_command('build') # If we built for any other platform, we can't install. build_plat = self.distribution.get_command_obj('build').plat_name # check warn_dir - it is a clue that the 'install' is happening # internally, and not to sys.path, so we don't check the platform # matches what we are running. if self.warn_dir and build_plat != get_platform(): raise DistutilsPlatformError("Can't install when " "cross-compiling") # Run all sub-commands (at least those that need to be run) for cmd_name in self.get_sub_commands(): self.run_command(cmd_name) if self.path_file: self.create_path_file() # write list of installed files, if requested. if self.record: outputs = self.get_outputs() if self.root: # strip any package prefix root_len = len(self.root) for counter in range(len(outputs)): outputs[counter] = outputs[counter][root_len:] self.execute(write_file, (self.record, outputs), "writing list of installed files to '%s'" % self.record) sys_path = map(os.path.normpath, sys.path) sys_path = map(os.path.normcase, sys_path) install_lib = os.path.normcase(os.path.normpath(self.install_lib)) if (self.warn_dir and not (self.path_file and self.install_path_file) and install_lib not in sys_path): log.debug(("modules installed to '%s', which is not in " "Python's module search path (sys.path) -- " "you'll have to change the search path yourself"), self.install_lib) def create_path_file(self): """Creates the .pth file""" filename = os.path.join(self.install_libbase, self.path_file + ".pth") if self.install_path_file: self.execute(write_file, (filename, [self.extra_dirs]), "creating %s" % filename) else: self.warn("path file '%s' not created" % filename) # -- Reporting methods --------------------------------------------- def get_outputs(self): """Assembles the outputs of all the sub-commands.""" outputs = [] for cmd_name in self.get_sub_commands(): cmd = self.get_finalized_command(cmd_name) # Add the contents of cmd.get_outputs(), ensuring # that outputs doesn't contain duplicate entries for filename in cmd.get_outputs(): if filename not in outputs: outputs.append(filename) if self.path_file and self.install_path_file: outputs.append(os.path.join(self.install_libbase, self.path_file + ".pth")) return outputs def get_inputs(self): """Returns the inputs of all the sub-commands""" # XXX gee, this looks familiar ;-( inputs = [] for cmd_name in self.get_sub_commands(): cmd = self.get_finalized_command(cmd_name) inputs.extend(cmd.get_inputs()) return inputs # -- Predicates for sub-command list ------------------------------- def has_lib(self): """Returns true if the current distribution has any Python modules to install.""" return (self.distribution.has_pure_modules() or self.distribution.has_ext_modules()) def has_headers(self): """Returns true if the current distribution has any headers to install.""" return self.distribution.has_headers() def has_scripts(self): """Returns true if the current distribution has any scripts to. install.""" return self.distribution.has_scripts() def has_data(self): """Returns true if the current distribution has any data to. install.""" return self.distribution.has_data_files() # 'sub_commands': a list of commands this command might have to run to # get its work done. See cmd.py for more info. sub_commands = [('install_lib', has_lib), ('install_headers', has_headers), ('install_scripts', has_scripts), ('install_data', has_data), ('install_egg_info', lambda self:True), ]