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"""Module/script to byte-compile all .py files to .pyc (or .pyo) files.
When called as a script with arguments, this compiles the directories
given as arguments recursively; the -l option prevents it from
recursing into directories.
Without arguments, if compiles all modules on sys.path, without
recursing into subdirectories. (Even though it should do so for
packages -- for now, you'll have to deal with packages separately.)
See module py_compile for details of the actual byte-compilation.
"""
import os
import sys
import errno
import imp
import py_compile
import struct
__all__ = ["compile_dir","compile_file","compile_path"]
def compile_dir(dir, maxlevels=10, ddir=None,
force=False, rx=None, quiet=False, legacy=False):
"""Byte-compile all modules in the given directory tree.
Arguments (only dir is required):
dir: the directory to byte-compile
maxlevels: maximum recursion level (default 10)
ddir: if given, purported directory name (this is the
directory name that will show up in error messages)
force: if True, force compilation, even if timestamps are up-to-date
quiet: if True, be quiet during compilation
legacy: if True, produce legacy pyc paths instead of PEP 3147 paths
"""
if not quiet:
print('Listing', dir, '...')
try:
names = os.listdir(dir)
except os.error:
print("Can't list", dir)
names = []
names.sort()
success = 1
for name in names:
if name == '__pycache__':
continue
fullname = os.path.join(dir, name)
if ddir is not None:
dfile = os.path.join(ddir, name)
else:
dfile = None
if not os.path.isdir(fullname):
if not compile_file(fullname, ddir, force, rx, quiet, legacy):
success = 0
elif (maxlevels > 0 and name != os.curdir and name != os.pardir and
os.path.isdir(fullname) and not os.path.islink(fullname)):
if not compile_dir(fullname, maxlevels - 1, dfile, force, rx,
quiet, legacy):
success = 0
return success
def compile_file(fullname, ddir=None, force=0, rx=None, quiet=False,
legacy=False):
"""Byte-compile file.
fullname: the file to byte-compile
ddir: if given, purported directory name (this is the
directory name that will show up in error messages)
force: if True, force compilation, even if timestamps are up-to-date
quiet: if True, be quiet during compilation
legacy: if True, produce legacy pyc paths instead of PEP 3147 paths
"""
success = 1
name = os.path.basename(fullname)
if ddir is not None:
dfile = os.path.join(ddir, name)
else:
dfile = None
if rx is not None:
mo = rx.search(fullname)
if mo:
return success
if os.path.isfile(fullname):
if legacy:
cfile = fullname + ('c' if __debug__ else 'o')
else:
cfile = imp.cache_from_source(fullname)
cache_dir = os.path.dirname(cfile)
head, tail = name[:-3], name[-3:]
if tail == '.py':
if not force:
try:
mtime = int(os.stat(fullname).st_mtime)
expect = struct.pack('<4sl', imp.get_magic(), mtime)
with open(cfile, 'rb') as chandle:
actual = chandle.read(8)
if expect == actual:
return success
except IOError:
pass
if not quiet:
print('Compiling', fullname, '...')
try:
ok = py_compile.compile(fullname, cfile, dfile, True)
except py_compile.PyCompileError as err:
if quiet:
print('*** Error compiling', fullname, '...')
else:
print('*** ', end='')
# escape non-printable characters in msg
msg = err.msg.encode(sys.stdout.encoding,
errors='backslashreplace')
msg = msg.decode(sys.stdout.encoding)
print(msg)
success = 0
except (SyntaxError, UnicodeError, IOError) as e:
if quiet:
print('*** Error compiling', fullname, '...')
else:
print('*** ', end='')
print(e.__class__.__name__ + ':', e)
success = 0
else:
if ok == 0:
success = 0
return success
def compile_path(skip_curdir=1, maxlevels=0, force=False, quiet=False,
legacy=False):
"""Byte-compile all module on sys.path.
Arguments (all optional):
skip_curdir: if true, skip current directory (default true)
maxlevels: max recursion level (default 0)
force: as for compile_dir() (default False)
quiet: as for compile_dir() (default False)
legacy: as for compile_dir() (default False)
"""
success = 1
for dir in sys.path:
if (not dir or dir == os.curdir) and skip_curdir:
print('Skipping current directory')
else:
success = success and compile_dir(dir, maxlevels, None,
force, quiet=quiet,
legacy=legacy)
return success
def main():
"""Script main program."""
import argparse
parser = argparse.ArgumentParser(
description='Utilities to support installing Python libraries.')
parser.add_argument('-l', action='store_const', default=10, const=0,
dest='maxlevels', help="don't recurse down")
parser.add_argument('-f', action='store_true', dest='force',
help='force rebuild even if timestamps are up to date')
parser.add_argument('-q', action='store_true', dest='quiet',
help='reduce output')
parser.add_argument('-b', action='store_true', dest='legacy',
help='produce legacy byte-compiled file paths')
parser.add_argument('-d', metavar='DESTDIR', dest='ddir', default=None,
help=('purported directory name for error messages; '
'if no directory arguments, -l sys.path '
'is assumed.'))
parser.add_argument('-x', metavar='REGEXP', dest='rx', default=None,
help=('skip files matching the regular expression.\n\t'
'The regexp is searched for in the full path '
'of the file'))
parser.add_argument('-i', metavar='FILE', dest='flist',
help='expand the list with the content of FILE.')
parser.add_argument('compile_dest', metavar='FILE|DIR', nargs='?')
args = parser.parse_args()
if (args.ddir and args.compile_dest != 1 and
not os.path.isdir(args.compile_dest)):
raise argparse.ArgumentError(
"-d destdir requires exactly one directory argument")
if args.rx:
import re
args.rx = re.compile(args.rx)
# if flist is provided then load it
compile_dests = [args.compile_dest]
if args.flist:
with open(args.flist) as f:
files = f.read().split()
compile_dests.extend(files)
try:
if compile_dests:
for dest in compile_dests:
if os.path.isdir(dest):
if not compile_dir(dest, args.maxlevels, args.ddir,
args.force, args.rx, args.quiet,
args.legacy):
return 0
else:
if not compile_file(dest, args.ddir, args.force, args.rx,
args.quiet, args.legacy):
return 0
else:
return compile_path(legacy=args.legacy)
except KeyboardInterrupt:
print("\n[interrupted]")
return 0
return 1
if __name__ == '__main__':
exit_status = int(not main())
sys.exit(exit_status)
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