languages/cpython
languages/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython synced 2024-09-05 16:38:56 +00:00
Code Issues Packages Projects Releases Wiki Activity

Issue #22826: The result of open() in Tools/freeze/bkfile.py is now better

Browse source 
compatible with regular files (in particular it now supports the context
management protocol).
This commit is contained in:
Serhiy Storchaka 2015-03-20 09:21:59 +02:00
parent 8490f5acfe
commit 53c3fb186a
4 changed files with 59 additions and 87 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
Misc/NEWS
View file

@ -89,6 +89,14 @@ Build
- Issue #23585: make patchcheck will ensure the interpreter is built.
Tools/Demos
-----------
- Issue #22826: The result of open() in Tools/freeze/bkfile.py is now better
compatible with regular files (in particular it now supports the context
management protocol).
What's New in Python 3.5 alpha 2?
=================================

67
Tools/freeze/bkfile.py
View file

@ -1,49 +1,26 @@
from builtins import open as _orig_open
class _BkFile:
def __init__(self, file, mode, bufsize):
import os
self.__filename = file
self.__backup = file + '~'
try:
os.unlink(self.__backup)
except OSError:
pass
try:
os.rename(file, self.__backup)
except OSError:
self.__backup = None
self.__file = _orig_open(file, mode, bufsize)
self.closed = self.__file.closed
self.fileno = self.__file.fileno
self.flush = self.__file.flush
self.isatty = self.__file.isatty
self.mode = self.__file.mode
self.name = self.__file.name
self.read = self.__file.read
try:
self.readinto = self.__file.readinto
except AttributeError:
pass
self.readline = self.__file.readline
self.readlines = self.__file.readlines
self.seek = self.__file.seek
self.tell = self.__file.tell
self.truncate = self.__file.truncate
self.write = self.__file.write
self.writelines = self.__file.writelines
def close(self):
self.__file.close()
if self.__backup is None:
return
import filecmp
if filecmp.cmp(self.__backup, self.__filename, shallow = 0):
import os
os.unlink(self.__filename)
os.rename(self.__backup, self.__filename)
def open(file, mode = 'r', bufsize = -1):
def open(file, mode='r', bufsize=-1):
if 'w' not in mode:
return _orig_open(file, mode, bufsize)
return _BkFile(file, mode, bufsize)
import os
backup = file + '~'
try:
os.unlink(backup)
except OSError:
pass
try:
os.rename(file, backup)
except OSError:
return _orig_open(file, mode, bufsize)
f = _orig_open(file, mode, bufsize)
_orig_close = f.close
def close():
_orig_close()
import filecmp
if filecmp.cmp(backup, file, shallow=False):
import os
os.unlink(file)
os.rename(backup, file)
f.close = close
return f

17
Tools/freeze/freeze.py
View file

@ -439,25 +439,17 @@ def main():
frozendllmain_c, os.path.basename(extensions_c)] + files
maindefn = checkextensions_win32.CExtension( '__main__', xtras )
frozen_extensions.append( maindefn )
outfp = open(makefile, 'w')
try:
with open(makefile, 'w') as outfp:
winmakemakefile.makemakefile(outfp,
locals(),
frozen_extensions,
os.path.basename(target))
finally:
outfp.close()
return
# generate config.c and Makefile
builtins.sort()
infp = open(config_c_in)
outfp = bkfile.open(config_c, 'w')
try:
with open(config_c_in) as infp, bkfile.open(config_c, 'w') as outfp:
makeconfig.makeconfig(infp, outfp, builtins)
finally:
outfp.close()
infp.close()
cflags = ['$(OPT)']
cppflags = defines + includes
@ -475,11 +467,8 @@ def main():
files + supp_sources + addfiles + libs + \
['$(MODLIBS)', '$(LIBS)', '$(SYSLIBS)']
outfp = bkfile.open(makefile, 'w')
try:
with bkfile.open(makefile, 'w') as outfp:
makemakefile.makemakefile(outfp, somevars, files, base_target)
finally:
outfp.close()
# Done!

54
Tools/freeze/makefreeze.py
View file

@ -39,36 +39,34 @@ def makefreeze(base, dict, debug=0, entry_point=None, fail_import=()):
mangled = "__".join(mod.split("."))
if m.__code__:
file = 'M_' + mangled + '.c'
outfp = bkfile.open(base + file, 'w')
files.append(file)
if debug:
print("freezing", mod, "...")
str = marshal.dumps(m.__code__)
size = len(str)
if m.__path__:
# Indicate package by negative size
size = -size
done.append((mod, mangled, size))
writecode(outfp, mangled, str)
outfp.close()
with bkfile.open(base + file, 'w') as outfp:
files.append(file)
if debug:
print("freezing", mod, "...")
str = marshal.dumps(m.__code__)
size = len(str)
if m.__path__:
# Indicate package by negative size
size = -size
done.append((mod, mangled, size))
writecode(outfp, mangled, str)
if debug:
print("generating table of frozen modules")
outfp = bkfile.open(base + 'frozen.c', 'w')
for mod, mangled, size in done:
outfp.write('extern unsigned char M_%s[];\n' % mangled)
outfp.write(header)
for mod, mangled, size in done:
outfp.write('\t{"%s", M_%s, %d},\n' % (mod, mangled, size))
outfp.write('\n')
# The following modules have a NULL code pointer, indicating
# that the frozen program should not search for them on the host
# system. Importing them will *always* raise an ImportError.
# The zero value size is never used.
for mod in fail_import:
outfp.write('\t{"%s", NULL, 0},\n' % (mod,))
outfp.write(trailer)
outfp.write(entry_point)
outfp.close()
with bkfile.open(base + 'frozen.c', 'w') as outfp:
for mod, mangled, size in done:
outfp.write('extern unsigned char M_%s[];\n' % mangled)
outfp.write(header)
for mod, mangled, size in done:
outfp.write('\t{"%s", M_%s, %d},\n' % (mod, mangled, size))
outfp.write('\n')
# The following modules have a NULL code pointer, indicating
# that the frozen program should not search for them on the host
# system. Importing them will *always* raise an ImportError.
# The zero value size is never used.
for mod in fail_import:
outfp.write('\t{"%s", NULL, 0},\n' % (mod,))
outfp.write(trailer)
outfp.write(entry_point)
return files