1 """distutils.command.build_py
3 Implements the Distutils 'build_py' command."""
10 from ..core import Command
11 from ..errors import DistutilsOptionError, DistutilsFileError
12 from ..util import convert_path
13 from distutils._log import log
16 class build_py(Command):
18 description = "\"build\" pure Python modules (copy to build directory)"
21 ('build-lib=', 'd', "directory to \"build\" (copy) to"),
22 ('compile', 'c', "compile .py to .pyc"),
23 ('no-compile', None, "don't compile .py files [default]"),
27 "also compile with optimization: -O1 for \"python -O\", "
28 "-O2 for \"python -OO\", and -O0 to disable [default: -O0]",
30 ('force', 'f', "forcibly build everything (ignore file timestamps)"),
33 boolean_options = ['compile', 'force']
34 negative_opt = {'no-compile': 'compile'}
36 def initialize_options(self):
38 self.py_modules = None
40 self.package_data = None
41 self.package_dir = None
46 def finalize_options(self):
47 self.set_undefined_options(
48 'build', ('build_lib', 'build_lib'), ('force', 'force')
51 # Get the distribution options that are aliases for build_py
52 # options -- list of packages and list of modules.
53 self.packages = self.distribution.packages
54 self.py_modules = self.distribution.py_modules
55 self.package_data = self.distribution.package_data
57 if self.distribution.package_dir:
58 for name, path in self.distribution.package_dir.items():
59 self.package_dir[name] = convert_path(path)
60 self.data_files = self.get_data_files()
62 # Ick, copied straight from install_lib.py (fancy_getopt needs a
63 # type system! Hell, *everything* needs a type system!!!)
64 if not isinstance(self.optimize, int):
66 self.optimize = int(self.optimize)
67 assert 0 <= self.optimize <= 2
68 except (ValueError, AssertionError):
69 raise DistutilsOptionError("optimize must be 0, 1, or 2")
72 # XXX copy_file by default preserves atime and mtime. IMHO this is
73 # the right thing to do, but perhaps it should be an option -- in
74 # particular, a site administrator might want installed files to
75 # reflect the time of installation rather than the last
76 # modification time before the installed release.
78 # XXX copy_file by default preserves mode, which appears to be the
79 # wrong thing to do: if a file is read-only in the working
80 # directory, we want it to be installed read/write so that the next
81 # installation of the same module distribution can overwrite it
82 # without problems. (This might be a Unix-specific issue.) Thus
83 # we turn off 'preserve_mode' when copying to the build directory,
84 # since the build directory is supposed to be exactly what the
85 # installation will look like (ie. we preserve mode when
88 # Two options control which modules will be installed: 'packages'
89 # and 'py_modules'. The former lets us work with whole packages, not
90 # specifying individual modules at all; the latter is for
91 # specifying modules one-at-a-time.
97 self.build_package_data()
99 self.byte_compile(self.get_outputs(include_bytecode=0))
101 def get_data_files(self):
102 """Generate list of '(package,src_dir,build_dir,filenames)' tuples"""
104 if not self.packages:
106 for package in self.packages:
107 # Locate package source directory
108 src_dir = self.get_package_dir(package)
110 # Compute package build directory
111 build_dir = os.path.join(*([self.build_lib] + package.split('.')))
113 # Length of path to strip from found files
116 plen = len(src_dir) + 1
118 # Strip directory from globbed filenames
119 filenames = [file[plen:] for file in self.find_data_files(package, src_dir)]
120 data.append((package, src_dir, build_dir, filenames))
123 def find_data_files(self, package, src_dir):
124 """Return filenames for package's data files in 'src_dir'"""
125 globs = self.package_data.get('', []) + self.package_data.get(package, [])
127 for pattern in globs:
128 # Each pattern has to be converted to a platform-specific path
129 filelist = glob.glob(
130 os.path.join(glob.escape(src_dir), convert_path(pattern))
132 # Files that match more than one pattern are only added once
134 [fn for fn in filelist if fn not in files and os.path.isfile(fn)]
138 def build_package_data(self):
139 """Copy data files into build directory"""
140 for package, src_dir, build_dir, filenames in self.data_files:
141 for filename in filenames:
142 target = os.path.join(build_dir, filename)
143 self.mkpath(os.path.dirname(target))
145 os.path.join(src_dir, filename), target, preserve_mode=False
148 def get_package_dir(self, package):
149 """Return the directory, relative to the top of the source
150 distribution, where package 'package' should be found
151 (at least according to the 'package_dir' option, if any)."""
152 path = package.split('.')
154 if not self.package_dir:
156 return os.path.join(*path)
163 pdir = self.package_dir['.'.join(path)]
165 tail.insert(0, path[-1])
169 return os.path.join(*tail)
171 # Oops, got all the way through 'path' without finding a
172 # match in package_dir. If package_dir defines a directory
173 # for the root (nameless) package, then fallback on it;
174 # otherwise, we might as well have not consulted
175 # package_dir at all, as we just use the directory implied
176 # by 'tail' (which should be the same as the original value
177 # of 'path' at this point).
178 pdir = self.package_dir.get('')
183 return os.path.join(*tail)
187 def check_package(self, package, package_dir):
188 # Empty dir name means current directory, which we can probably
189 # assume exists. Also, os.path.exists and isdir don't know about
190 # my "empty string means current dir" convention, so we have to
192 if package_dir != "":
193 if not os.path.exists(package_dir):
194 raise DistutilsFileError(
195 "package directory '%s' does not exist" % package_dir
197 if not os.path.isdir(package_dir):
198 raise DistutilsFileError(
199 "supposed package directory '%s' exists, "
200 "but is not a directory" % package_dir
203 # Directories without __init__.py are namespace packages (PEP 420).
205 init_py = os.path.join(package_dir, "__init__.py")
206 if os.path.isfile(init_py):
209 # Either not in a package at all (__init__.py not expected), or
210 # __init__.py doesn't exist -- so don't return the filename.
213 def check_module(self, module, module_file):
214 if not os.path.isfile(module_file):
215 log.warning("file %s (for module %s) not found", module_file, module)
220 def find_package_modules(self, package, package_dir):
221 self.check_package(package, package_dir)
222 module_files = glob.glob(os.path.join(glob.escape(package_dir), "*.py"))
224 setup_script = os.path.abspath(self.distribution.script_name)
226 for f in module_files:
227 abs_f = os.path.abspath(f)
228 if abs_f != setup_script:
229 module = os.path.splitext(os.path.basename(f))[0]
230 modules.append((package, module, f))
232 self.debug_print("excluding %s" % setup_script)
235 def find_modules(self):
236 """Finds individually-specified Python modules, ie. those listed by
237 module name in 'self.py_modules'. Returns a list of tuples (package,
238 module_base, filename): 'package' is a tuple of the path through
239 package-space to the module; 'module_base' is the bare (no
240 packages, no dots) module name, and 'filename' is the path to the
241 ".py" file (relative to the distribution root) that implements the
244 # Map package names to tuples of useful info about the package:
245 # (package_dir, checked)
246 # package_dir - the directory where we'll find source files for
248 # checked - true if we have checked that the package directory
249 # is valid (exists, contains __init__.py, ... ?)
252 # List of (package, module, filename) tuples to return
255 # We treat modules-in-packages almost the same as toplevel modules,
256 # just the "package" for a toplevel is empty (either an empty
257 # string or empty list, depending on context). Differences:
258 # - don't check for __init__.py in directory for empty package
259 for module in self.py_modules:
260 path = module.split('.')
261 package = '.'.join(path[0:-1])
262 module_base = path[-1]
265 (package_dir, checked) = packages[package]
267 package_dir = self.get_package_dir(package)
271 init_py = self.check_package(package, package_dir)
272 packages[package] = (package_dir, 1)
274 modules.append((package, "__init__", init_py))
276 # XXX perhaps we should also check for just .pyc files
277 # (so greedy closed-source bastards can distribute Python
279 module_file = os.path.join(package_dir, module_base + ".py")
280 if not self.check_module(module, module_file):
283 modules.append((package, module_base, module_file))
287 def find_all_modules(self):
288 """Compute the list of all modules that will be built, whether
289 they are specified one-module-at-a-time ('self.py_modules') or
290 by whole packages ('self.packages'). Return a list of tuples
291 (package, module, module_file), just like 'find_modules()' and
292 'find_package_modules()' do."""
295 modules.extend(self.find_modules())
297 for package in self.packages:
298 package_dir = self.get_package_dir(package)
299 m = self.find_package_modules(package, package_dir)
303 def get_source_files(self):
304 return [module[-1] for module in self.find_all_modules()]
306 def get_module_outfile(self, build_dir, package, module):
307 outfile_path = [build_dir] + list(package) + [module + ".py"]
308 return os.path.join(*outfile_path)
310 def get_outputs(self, include_bytecode=1):
311 modules = self.find_all_modules()
313 for (package, module, module_file) in modules:
314 package = package.split('.')
315 filename = self.get_module_outfile(self.build_lib, package, module)
316 outputs.append(filename)
320 importlib.util.cache_from_source(filename, optimization='')
322 if self.optimize > 0:
324 importlib.util.cache_from_source(
325 filename, optimization=self.optimize
330 os.path.join(build_dir, filename)
331 for package, src_dir, build_dir, filenames in self.data_files
332 for filename in filenames
337 def build_module(self, module, module_file, package):
338 if isinstance(package, str):
339 package = package.split('.')
340 elif not isinstance(package, (list, tuple)):
342 "'package' must be a string (dot-separated), list, or tuple"
345 # Now put the module source file into the "build" area -- this is
346 # easy, we just copy it somewhere under self.build_lib (the build
347 # directory for Python source).
348 outfile = self.get_module_outfile(self.build_lib, package, module)
349 dir = os.path.dirname(outfile)
351 return self.copy_file(module_file, outfile, preserve_mode=0)
353 def build_modules(self):
354 modules = self.find_modules()
355 for (package, module, module_file) in modules:
356 # Now "build" the module -- ie. copy the source file to
357 # self.build_lib (the build directory for Python source).
358 # (Actually, it gets copied to the directory for this package
359 # under self.build_lib.)
360 self.build_module(module, module_file, package)
362 def build_packages(self):
363 for package in self.packages:
364 # Get list of (package, module, module_file) tuples based on
365 # scanning the package directory. 'package' is only included
366 # in the tuple so that 'find_modules()' and
367 # 'find_package_tuples()' have a consistent interface; it's
368 # ignored here (apart from a sanity check). Also, 'module' is
369 # the *unqualified* module name (ie. no dots, no package -- we
370 # already know its package!), and 'module_file' is the path to
371 # the .py file, relative to the current directory
372 # (ie. including 'package_dir').
373 package_dir = self.get_package_dir(package)
374 modules = self.find_package_modules(package, package_dir)
376 # Now loop over the modules we found, "building" each one (just
377 # copy it to self.build_lib).
378 for (package_, module, module_file) in modules:
379 assert package == package_
380 self.build_module(module, module_file, package)
382 def byte_compile(self, files):
383 if sys.dont_write_bytecode:
384 self.warn('byte-compiling is disabled, skipping.')
387 from ..util import byte_compile
389 prefix = self.build_lib
390 if prefix[-1] != os.sep:
391 prefix = prefix + os.sep
393 # XXX this code is essentially the same as the 'byte_compile()
394 # method of the "install_lib" command, except for the determination
395 # of the 'prefix' string. Hmmm.
398 files, optimize=0, force=self.force, prefix=prefix, dry_run=self.dry_run
400 if self.optimize > 0:
403 optimize=self.optimize,
406 dry_run=self.dry_run,