You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
82 lines
2.9 KiB
82 lines
2.9 KiB
"""Routine to "compile" a .py file to a .pyc (or .pyo) file. |
|
|
|
This module has intimate knowledge of the format of .pyc files. |
|
""" |
|
|
|
import imp |
|
MAGIC = imp.get_magic() |
|
|
|
__all__ = ["compile"] |
|
|
|
def wr_long(f, x): |
|
"""Internal; write a 32-bit int to a file in little-endian order.""" |
|
f.write(chr( x & 0xff)) |
|
f.write(chr((x >> 8) & 0xff)) |
|
f.write(chr((x >> 16) & 0xff)) |
|
f.write(chr((x >> 24) & 0xff)) |
|
|
|
def compile(file, cfile=None, dfile=None): |
|
"""Byte-compile one Python source file to Python bytecode. |
|
|
|
Arguments: |
|
|
|
file: source filename |
|
cfile: target filename; defaults to source with 'c' or 'o' appended |
|
('c' normally, 'o' in optimizing mode, giving .pyc or .pyo) |
|
dfile: purported filename; defaults to source (this is the filename |
|
that will show up in error messages) |
|
|
|
Note that it isn't necessary to byte-compile Python modules for |
|
execution efficiency -- Python itself byte-compiles a module when |
|
it is loaded, and if it can, writes out the bytecode to the |
|
corresponding .pyc (or .pyo) file. |
|
|
|
However, if a Python installation is shared between users, it is a |
|
good idea to byte-compile all modules upon installation, since |
|
other users may not be able to write in the source directories, |
|
and thus they won't be able to write the .pyc/.pyo file, and then |
|
they would be byte-compiling every module each time it is loaded. |
|
This can slow down program start-up considerably. |
|
|
|
See compileall.py for a script/module that uses this module to |
|
byte-compile all installed files (or all files in selected |
|
directories). |
|
|
|
""" |
|
import os, marshal, __builtin__ |
|
f = open(file) |
|
try: |
|
timestamp = long(os.fstat(f.fileno())[8]) |
|
except AttributeError: |
|
timestamp = long(os.stat(file)[8]) |
|
codestring = f.read() |
|
# If parsing from a string, line breaks are \n (see parsetok.c:tok_nextc) |
|
# Replace will return original string if pattern is not found, so |
|
# we don't need to check whether it is found first. |
|
codestring = codestring.replace("\r\n","\n") |
|
codestring = codestring.replace("\r","\n") |
|
f.close() |
|
if codestring and codestring[-1] != '\n': |
|
codestring = codestring + '\n' |
|
try: |
|
codeobject = __builtin__.compile(codestring, dfile or file, 'exec') |
|
except SyntaxError, detail: |
|
import traceback, sys |
|
lines = traceback.format_exception_only(SyntaxError, detail) |
|
for line in lines: |
|
sys.stderr.write(line.replace('File "<string>"', |
|
'File "%s"' % (dfile or file))) |
|
return |
|
if not cfile: |
|
cfile = file + (__debug__ and 'c' or 'o') |
|
fc = open(cfile, 'wb') |
|
fc.write('\0\0\0\0') |
|
wr_long(fc, timestamp) |
|
marshal.dump(codeobject, fc) |
|
fc.flush() |
|
fc.seek(0, 0) |
|
fc.write(MAGIC) |
|
fc.close() |
|
if os.name == 'mac': |
|
import macfs |
|
macfs.FSSpec(cfile).SetCreatorType('Pyth', 'PYC ')
|
|
|