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calibre/setup/extensions.py
Kovid Goyal e0e1dbc638 Fix building with Qt 5.3.x
2015-03-13 09:26:40 +05:30

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#!/usr/bin/env python2
# vim:fileencoding=UTF-8:ts=4:sw=4:sta:et:sts=4:ai
from __future__ import with_statement
__license__ = 'GPL v3'
__copyright__ = '2009, Kovid Goyal <kovid@kovidgoyal.net>'
__docformat__ = 'restructuredtext en'
import textwrap, os, shlex, subprocess, glob, shutil, re, sys
from distutils import sysconfig
from setup import Command, islinux, isbsd, isosx, SRC, iswindows, __version__
from setup.build_environment import (chmlib_inc_dirs,
podofo_inc, podofo_lib, podofo_error, pyqt, NMAKE, QMAKE,
msvc, win_inc, win_lib, magick_inc_dirs, magick_lib_dirs,
magick_libs, chmlib_lib_dirs, sqlite_inc_dirs, icu_inc_dirs,
icu_lib_dirs, ft_libs, ft_lib_dirs, ft_inc_dirs, cpu_count,
zlib_libs, zlib_lib_dirs, zlib_inc_dirs, is64bit, glib_flags, fontconfig_flags)
from setup.parallel_build import create_job, parallel_build
isunix = islinux or isosx or isbsd
make = 'make' if isunix else NMAKE
py_lib = os.path.join(sys.prefix, 'libs', 'python%d%d.lib' % sys.version_info[:2])
class Extension(object):
@classmethod
def absolutize(cls, paths):
return list(set([x if os.path.isabs(x) else os.path.join(SRC, x.replace('/',
os.sep)) for x in paths]))
def __init__(self, name, sources, **kwargs):
self.name = name
self.needs_cxx = bool([1 for x in sources if os.path.splitext(x)[1] in
('.cpp', '.c++', '.cxx')])
self.sources = self.absolutize(sources)
self.headers = self.absolutize(kwargs.get('headers', []))
self.sip_files = self.absolutize(kwargs.get('sip_files', []))
self.inc_dirs = self.absolutize(kwargs.get('inc_dirs', []))
self.lib_dirs = self.absolutize(kwargs.get('lib_dirs', []))
self.extra_objs = self.absolutize(kwargs.get('extra_objs', []))
self.error = kwargs.get('error', None)
self.libraries = kwargs.get('libraries', [])
self.cflags = kwargs.get('cflags', [])
self.ldflags = kwargs.get('ldflags', [])
self.optional = kwargs.get('optional', False)
of = kwargs.get('optimize_level', None)
if of is None:
of = '/Ox' if iswindows else '-O3'
else:
flag = '/O%d' if iswindows else '-O%d'
of = flag % of
self.cflags.insert(0, of)
self.qt_private_headers = kwargs.get('qt_private', [])
def preflight(self, obj_dir, compiler, linker, builder, cflags, ldflags):
pass
reflow_sources = glob.glob(os.path.join(SRC, 'calibre', 'ebooks', 'pdf', '*.cpp'))
reflow_headers = glob.glob(os.path.join(SRC, 'calibre', 'ebooks', 'pdf', '*.h'))
icu_libs = ['icudata', 'icui18n', 'icuuc', 'icuio']
icu_cflags = []
if iswindows:
icu_libs = ['icudt', 'icuin', 'icuuc', 'icuio']
extensions = [
Extension('hunspell',
['hunspell/'+x for x in
'affentry.cxx affixmgr.cxx csutil.cxx dictmgr.cxx filemgr.cxx hashmgr.cxx hunspell.cxx phonet.cxx replist.cxx suggestmgr.cxx'.split()
] + ['calibre/utils/spell/hunspell_wrapper.cpp',],
inc_dirs=['hunspell'],
cflags='/DHUNSPELL_STATIC /D_CRT_SECURE_NO_WARNINGS /DUNICODE /D_UNICODE'.split() if iswindows else ['-DHUNSPELL_STATIC'],
optimize_level=2,
),
Extension('_regex',
['regex/_regex.c', 'regex/_regex_unicode.c'],
headers=['regex/_regex.h'],
optimize_level=2,
),
Extension('speedup',
['calibre/utils/speedup.c'],
libraries=[] if iswindows else ['m']
),
Extension('html',
['calibre/gui2/tweak_book/editor/syntax/html.c'],
),
Extension('tokenizer',
['tinycss/tokenizer.c'],
),
Extension('_patiencediff_c',
['calibre/gui2/tweak_book/diff/_patiencediff_c.c'],
),
Extension('icu',
['calibre/utils/icu.c'],
headers=['calibre/utils/icu_calibre_utils.h'],
libraries=icu_libs,
lib_dirs=icu_lib_dirs,
inc_dirs=icu_inc_dirs,
cflags=icu_cflags
),
Extension('sqlite_custom',
['calibre/library/sqlite_custom.c'],
inc_dirs=sqlite_inc_dirs
),
Extension('chmlib',
['calibre/utils/chm/swig_chm.c'],
libraries=['ChmLib' if iswindows else 'chm'],
inc_dirs=chmlib_inc_dirs,
lib_dirs=chmlib_lib_dirs,
cflags=["-DSWIG_COBJECT_TYPES"]),
Extension('chm_extra',
['calibre/utils/chm/extra.c'],
libraries=['ChmLib' if iswindows else 'chm'],
inc_dirs=chmlib_inc_dirs,
lib_dirs=chmlib_lib_dirs,
cflags=["-D__PYTHON__"]),
Extension('magick',
['calibre/utils/magick/magick.c'],
headers=['calibre/utils/magick/magick_constants.h'],
libraries=magick_libs,
lib_dirs=magick_lib_dirs,
inc_dirs=magick_inc_dirs,
cflags=['-DMAGICKCORE_QUANTUM_DEPTH=16', '-DMAGICKCORE_HDRI_ENABLE=0']
),
Extension('lzx',
['calibre/utils/lzx/lzxmodule.c',
'calibre/utils/lzx/compressor.c',
'calibre/utils/lzx/lzxd.c',
'calibre/utils/lzx/lzc.c',
'calibre/utils/lzx/lzxc.c'],
headers=['calibre/utils/lzx/msstdint.h',
'calibre/utils/lzx/lzc.h',
'calibre/utils/lzx/lzxmodule.h',
'calibre/utils/lzx/system.h',
'calibre/utils/lzx/lzxc.h',
'calibre/utils/lzx/lzxd.h',
'calibre/utils/lzx/mspack.h'],
inc_dirs=['calibre/utils/lzx']),
Extension('freetype',
['calibre/utils/fonts/freetype.cpp'],
inc_dirs=ft_inc_dirs,
libraries=ft_libs,
lib_dirs=ft_lib_dirs),
Extension('woff',
['calibre/utils/fonts/woff/main.c',
'calibre/utils/fonts/woff/woff.c'],
headers=[
'calibre/utils/fonts/woff/woff.h',
'calibre/utils/fonts/woff/woff-private.h'],
libraries=zlib_libs,
lib_dirs=zlib_lib_dirs,
inc_dirs=zlib_inc_dirs,
),
Extension('msdes',
['calibre/utils/msdes/msdesmodule.c',
'calibre/utils/msdes/des.c'],
headers=['calibre/utils/msdes/spr.h',
'calibre/utils/msdes/d3des.h'],
inc_dirs=['calibre/utils/msdes']),
Extension('cPalmdoc',
['calibre/ebooks/compression/palmdoc.c']),
Extension('bzzdec',
['calibre/ebooks/djvu/bzzdecoder.c'],
inc_dirs=(['calibre/utils/chm'] if iswindows else []) # For stdint.h
),
Extension('matcher',
['calibre/utils/matcher.c'],
headers=['calibre/utils/icu_calibre_utils.h'],
libraries=icu_libs,
lib_dirs=icu_lib_dirs,
cflags=icu_cflags,
inc_dirs=icu_inc_dirs
),
Extension('podofo',
[
'calibre/utils/podofo/utils.cpp',
'calibre/utils/podofo/output.cpp',
'calibre/utils/podofo/doc.cpp',
'calibre/utils/podofo/outline.cpp',
'calibre/utils/podofo/podofo.cpp',
],
headers=[
'calibre/utils/podofo/global.h',
],
libraries=['podofo'],
lib_dirs=[podofo_lib],
inc_dirs=[podofo_inc, os.path.dirname(podofo_inc)],
error=podofo_error),
Extension('pictureflow',
['calibre/gui2/pictureflow/pictureflow.cpp'],
inc_dirs=['calibre/gui2/pictureflow'],
headers=['calibre/gui2/pictureflow/pictureflow.h'],
sip_files=['calibre/gui2/pictureflow/pictureflow.sip']
),
Extension('progress_indicator',
['calibre/gui2/progress_indicator/QProgressIndicator.cpp'],
inc_dirs=['calibre/gui2/progress_indicator'],
headers=['calibre/gui2/progress_indicator/QProgressIndicator.h'],
sip_files=['calibre/gui2/progress_indicator/QProgressIndicator.sip']
),
Extension('qt_hack',
['calibre/ebooks/pdf/render/qt_hack.cpp'],
inc_dirs=['calibre/ebooks/pdf/render'],
headers=['calibre/ebooks/pdf/render/qt_hack.h'],
qt_private=['core', 'gui'],
sip_files=['calibre/ebooks/pdf/render/qt_hack.sip']
),
Extension('unrar',
['unrar/%s.cpp'%(x.partition('.')[0]) for x in '''
rar.o strlist.o strfn.o pathfn.o savepos.o smallfn.o global.o file.o
filefn.o filcreat.o archive.o arcread.o unicode.o system.o
isnt.o crypt.o crc.o rawread.o encname.o resource.o match.o
timefn.o rdwrfn.o consio.o options.o ulinks.o errhnd.o rarvm.o
secpassword.o rijndael.o getbits.o sha1.o extinfo.o extract.o
volume.o list.o find.o unpack.o cmddata.o filestr.o scantree.o
'''.split()] + ['calibre/utils/unrar.cpp'],
inc_dirs=['unrar'],
cflags=[('/' if iswindows else '-') + x for x in (
'DSILENT', 'DRARDLL', 'DUNRAR')] + (
[] if iswindows else ['-D_FILE_OFFSET_BITS=64',
'-D_LARGEFILE_SOURCE']),
optimize_level=2,
libraries=['User32', 'Advapi32', 'kernel32', 'Shell32'] if iswindows else []
),
]
if iswindows:
extensions.extend([
Extension('winutil',
['calibre/utils/windows/winutil.c'],
libraries=['shell32', 'setupapi', 'wininet'],
cflags=['/X']
),
Extension('wpd',
[
'calibre/devices/mtp/windows/utils.cpp',
'calibre/devices/mtp/windows/device_enumeration.cpp',
'calibre/devices/mtp/windows/content_enumeration.cpp',
'calibre/devices/mtp/windows/device.cpp',
'calibre/devices/mtp/windows/wpd.cpp',
],
headers=[
'calibre/devices/mtp/windows/global.h',
],
libraries=['ole32', 'oleaut32', 'portabledeviceguids', 'user32'],
cflags=['/X']
),
Extension('winfonts',
['calibre/utils/fonts/winfonts.cpp'],
libraries=['Gdi32', 'User32'],
cflags=['/X']
),
])
if isosx:
extensions.append(Extension('usbobserver',
['calibre/devices/usbobserver/usbobserver.c'],
ldflags=['-framework', 'CoreServices', '-framework', 'IOKit'])
)
if islinux or isosx:
extensions.append(Extension('libusb',
['calibre/devices/libusb/libusb.c'],
libraries=['usb-1.0']
))
extensions.append(Extension('libmtp',
[
'calibre/devices/mtp/unix/devices.c',
'calibre/devices/mtp/unix/libmtp.c'
],
headers=[
'calibre/devices/mtp/unix/devices.h',
'calibre/devices/mtp/unix/upstream/music-players.h',
'calibre/devices/mtp/unix/upstream/device-flags.h',
],
libraries=['mtp']
))
if isunix:
cc = os.environ.get('CC', 'gcc')
cxx = os.environ.get('CXX', 'g++')
debug = ''
# debug = '-ggdb'
cflags = os.environ.get('OVERRIDE_CFLAGS',
'-Wall -DNDEBUG %s -fno-strict-aliasing -pipe' % debug)
cflags = shlex.split(cflags) + ['-fPIC']
ldflags = os.environ.get('OVERRIDE_LDFLAGS', '-Wall')
ldflags = shlex.split(ldflags)
cflags += shlex.split(os.environ.get('CFLAGS', ''))
ldflags += shlex.split(os.environ.get('LDFLAGS', ''))
if islinux:
cflags.append('-pthread')
ldflags.append('-shared')
cflags.append('-I'+sysconfig.get_python_inc())
ldflags.append('-lpython'+sysconfig.get_python_version())
if isbsd:
cflags.append('-pthread')
ldflags.append('-shared')
cflags.append('-I'+sysconfig.get_python_inc())
ldflags.append('-lpython'+sysconfig.get_python_version())
if isosx:
cflags.append('-D_OSX')
ldflags.extend('-bundle -undefined dynamic_lookup'.split())
cflags.extend(['-fno-common', '-dynamic'])
cflags.append('-I'+sysconfig.get_python_inc())
if iswindows:
cc = cxx = msvc.cc
cflags = '/c /nologo /MD /W3 /EHsc /DNDEBUG'.split()
ldflags = '/DLL /nologo /INCREMENTAL:NO /NODEFAULTLIB:libcmt.lib'.split()
# cflags = '/c /nologo /Ox /MD /W3 /EHsc /Zi'.split()
# ldflags = '/DLL /nologo /INCREMENTAL:NO /DEBUG'.split()
if is64bit:
cflags.append('/GS-')
for p in win_inc:
cflags.append('-I'+p)
for p in win_lib:
ldflags.append('/LIBPATH:'+p)
cflags.append('-I%s'%sysconfig.get_python_inc())
ldflags.append('/LIBPATH:'+os.path.join(sysconfig.PREFIX, 'libs'))
class Build(Command):
short_description = 'Build calibre C/C++ extension modules'
description = textwrap.dedent('''\
calibre depends on several python extensions written in C/C++.
This command will compile them. You can influence the compile
process by several environment variables, listed below:
CC - C Compiler defaults to gcc
CXX - C++ Compiler, defaults to g++
CFLAGS - Extra compiler flags
LDFLAGS - Extra linker flags
POPPLER_INC_DIR - poppler header files
POPPLER_LIB_DIR - poppler-qt4 library
PODOFO_INC_DIR - podofo header files
PODOFO_LIB_DIR - podofo library files
QMAKE - Path to qmake
SIP_BIN - Path to the sip binary
VS90COMNTOOLS - Location of Microsoft Visual Studio 9 Tools (windows only)
''')
def add_options(self, parser):
choices = [e.name for e in extensions]+['all', 'headless']
parser.add_option('-1', '--only', choices=choices, default='all',
help=('Build only the named extension. Available: '+
', '.join(choices)+'. Default:%default'))
parser.add_option('--no-compile', default=False, action='store_true',
help='Skip compiling all C/C++ extensions.')
def run(self, opts):
if opts.no_compile:
self.info('--no-compile specified, skipping compilation')
return
self.obj_dir = os.path.join(os.path.dirname(SRC), 'build', 'objects')
if not os.path.exists(self.obj_dir):
os.makedirs(self.obj_dir)
for ext in extensions:
if opts.only != 'all' and opts.only != ext.name:
continue
if ext.error is not None:
if ext.optional:
self.warn(ext.error)
continue
else:
raise Exception(ext.error)
dest = self.dest(ext)
if not os.path.exists(self.d(dest)):
os.makedirs(self.d(dest))
self.info('\n####### Building extension', ext.name, '#'*7)
self.build(ext, dest)
if opts.only in {'all', 'headless'}:
self.build_headless()
def dest(self, ext):
ex = '.pyd' if iswindows else '.so'
return os.path.join(SRC, 'calibre', 'plugins', getattr(ext, 'name', ext))+ex
def inc_dirs_to_cflags(self, dirs):
return ['-I'+x for x in dirs]
def lib_dirs_to_ldflags(self, dirs):
pref = '/LIBPATH:' if iswindows else '-L'
return [pref+x for x in dirs]
def libraries_to_ldflags(self, dirs):
pref = '' if iswindows else '-l'
suff = '.lib' if iswindows else ''
return [pref+x+suff for x in dirs]
def build(self, ext, dest):
if ext.sip_files:
return self.build_pyqt_extension(ext, dest)
compiler = cxx if ext.needs_cxx else cc
linker = msvc.linker if iswindows else compiler
objects = []
obj_dir = self.j(self.obj_dir, ext.name)
ext.preflight(obj_dir, compiler, linker, self, cflags, ldflags)
einc = self.inc_dirs_to_cflags(ext.inc_dirs)
if not os.path.exists(obj_dir):
os.makedirs(obj_dir)
jobs = []
for src in ext.sources:
obj = self.j(obj_dir, os.path.splitext(self.b(src))[0]+'.o')
objects.append(obj)
if self.newer(obj, [src]+ext.headers):
inf = '/Tp' if src.endswith('.cpp') or src.endswith('.cxx') else '/Tc'
sinc = [inf+src] if iswindows else ['-c', src]
oinc = ['/Fo'+obj] if iswindows else ['-o', obj]
cmd = [compiler] + cflags + ext.cflags + einc + sinc + oinc
jobs.append(create_job(cmd))
if jobs:
self.info('Compiling', ext.name)
if not parallel_build(jobs, self.info):
raise SystemExit(1)
dest = self.dest(ext)
elib = self.lib_dirs_to_ldflags(ext.lib_dirs)
xlib = self.libraries_to_ldflags(ext.libraries)
if self.newer(dest, objects+ext.extra_objs):
self.info('Linking', ext.name)
cmd = [linker]
if iswindows:
cmd += ldflags + ext.ldflags + elib + xlib + \
['/EXPORT:init'+ext.name] + objects + ext.extra_objs + ['/OUT:'+dest]
else:
cmd += objects + ext.extra_objs + ['-o', dest] + ldflags + ext.ldflags + elib + xlib
self.info('\n\n', ' '.join(cmd), '\n\n')
self.check_call(cmd)
if iswindows:
for x in ('.exp', '.lib'):
x = os.path.splitext(dest)[0]+x
if os.path.exists(x):
os.remove(x)
def check_call(self, *args, **kwargs):
"""print cmdline if an error occured
If something is missing (qmake e.g.) you get a non-informative error
self.check_call(qmc + [ext.name+'.pro'])
so you would have to look a the source to see the actual command.
"""
try:
subprocess.check_call(*args, **kwargs)
except:
cmdline = ' '.join(['"%s"' % (arg) if ' ' in arg else arg for arg in args[0]])
print "Error while executing: %s\n" % (cmdline)
raise
def build_headless(self):
if iswindows or isosx:
return # Dont have headless operation on these platforms
from PyQt5.QtCore import QT_VERSION
self.info('\n####### Building headless QPA plugin', '#'*7)
a = Extension.absolutize
headers = a([
'calibre/headless/headless_backingstore.h',
'calibre/headless/headless_integration.h',
])
sources = a([
'calibre/headless/main.cpp',
'calibre/headless/headless_backingstore.cpp',
'calibre/headless/headless_integration.cpp',
])
if QT_VERSION >= 0x50401:
headers.extend(a(['calibre/headless/fontconfig_database.h']))
sources.extend(a(['calibre/headless/fontconfig_database.cpp']))
others = a(['calibre/headless/headless.json'])
target = self.dest('headless')
if not self.newer(target, headers + sources + others):
return
# Arch and possibly other distros (fedora?) monkey patches qmake as a
# result of which it fails to add glib-2.0 and freetype2 to the list of
# library dependencies. Compiling QPA plugins uses the static
# libQt5PlatformSupport.a which needs glib to be specified after it for
# linking to succeed, so we add it to QMAKE_LIBS_PRIVATE (we cannot use
# LIBS as that would put -lglib-2.0 before libQt5PlatformSupport. See
# https://bugs.archlinux.org/task/38819
pro = textwrap.dedent(
'''\
TARGET = headless
PLUGIN_TYPE = platforms
PLUGIN_CLASS_NAME = HeadlessIntegrationPlugin
load(qt_plugin)
QT += core-private gui-private platformsupport-private
HEADERS = {headers}
SOURCES = {sources}
OTHER_FILES = {others}
INCLUDEPATH += {freetype}
DESTDIR = {destdir}
CONFIG -= create_cmake # Prevent qmake from generating a cmake build file which it puts in the calibre src directory
QMAKE_LIBS_PRIVATE += {glib} {fontconfig}
''').format(
headers=' '.join(headers), sources=' '.join(sources), others=' '.join(others), destdir=self.d(
target), glib=glib_flags, fontconfig=fontconfig_flags, freetype=' '.join(ft_inc_dirs))
bdir = self.j(self.d(self.SRC), 'build', 'headless')
if not os.path.exists(bdir):
os.makedirs(bdir)
pf = self.j(bdir, 'headless.pro')
open(self.j(bdir, '.qmake.conf'), 'wb').close()
with open(pf, 'wb') as f:
f.write(pro.encode('utf-8'))
cwd = os.getcwd()
os.chdir(bdir)
try:
self.check_call([QMAKE] + [self.b(pf)])
self.check_call([make] + ['-j%d'%(cpu_count or 1)])
finally:
os.chdir(cwd)
def build_sip_files(self, ext, src_dir):
sip_files = ext.sip_files
ext.sip_files = []
sipf = sip_files[0]
sbf = self.j(src_dir, self.b(sipf)+'.sbf')
if self.newer(sbf, [sipf]+ext.headers):
cmd = [pyqt['sip_bin'], '-w', '-c', src_dir, '-b', sbf, '-I'+
pyqt['pyqt_sip_dir']] + shlex.split(pyqt['sip_flags']) + [sipf]
self.info(' '.join(cmd))
self.check_call(cmd)
self.info('')
raw = open(sbf, 'rb').read().decode('utf-8')
def read(x):
ans = re.search('^%s\s*=\s*(.+)$' % x, raw, flags=re.M).group(1).strip()
if x != 'target':
ans = ans.split()
return ans
return {x:read(x) for x in ('target', 'sources', 'headers')}
def build_pyqt_extension(self, ext, dest):
pyqt_dir = self.j(self.d(self.SRC), 'build', 'pyqt')
src_dir = self.j(pyqt_dir, ext.name)
if not os.path.exists(src_dir):
os.makedirs(src_dir)
sip = self.build_sip_files(ext, src_dir)
pro = textwrap.dedent(
'''\
TEMPLATE = lib
CONFIG += release plugin
QT += widgets
TARGET = {target}
HEADERS = {headers}
SOURCES = {sources}
INCLUDEPATH += {sipinc} {pyinc}
VERSION = {ver}
win32 {{
LIBS += {py_lib}
TARGET_EXT = .dll
}}
macx {{
QMAKE_LFLAGS += "-undefined dynamic_lookup"
}}
''').format(
target=sip['target'], headers=' '.join(sip['headers'] + ext.headers), sources=' '.join(ext.sources + sip['sources']),
sipinc=pyqt['sip_inc_dir'], pyinc=sysconfig.get_python_inc(), py_lib=py_lib,
ver=__version__
)
for incdir in ext.inc_dirs:
pro += '\nINCLUDEPATH += ' + incdir
if not iswindows and not isosx:
# Ensure that only the init symbol is exported
pro += '\nQMAKE_LFLAGS += -Wl,--version-script=%s.exp' % sip['target']
with open(os.path.join(src_dir, sip['target'] + '.exp'), 'wb') as f:
f.write(('{ global: init%s; local: *; };' % sip['target']).encode('utf-8'))
if ext.qt_private_headers:
qph = ' '.join(x + '-private' for x in ext.qt_private_headers)
pro += '\nQT += ' + qph
proname = '%s.pro' % sip['target']
with open(os.path.join(src_dir, proname), 'wb') as f:
f.write(pro.encode('utf-8'))
cwd = os.getcwdu()
qmc = []
if iswindows:
qmc += ['-spec', 'win32-msvc2008']
fext = 'dll' if iswindows else 'dylib' if isosx else 'so'
name = '%s%s.%s' % ('release/' if iswindows else 'lib', sip['target'], fext)
try:
os.chdir(src_dir)
if self.newer(dest, sip['headers'] + sip['sources'] + ext.sources + ext.headers):
self.check_call([QMAKE] + qmc + [proname])
self.check_call([make]+([] if iswindows else ['-j%d'%(cpu_count or 1)]))
shutil.copy2(os.path.realpath(name), dest)
if iswindows:
shutil.copy2(name + '.manifest', dest + '.manifest')
finally:
os.chdir(cwd)
def clean(self):
for ext in extensions:
dest = self.dest(ext)
for x in (dest, dest+'.manifest'):
if os.path.exists(x):
os.remove(x)
build_dir = self.j(self.d(self.SRC), 'build')
if os.path.exists(build_dir):
shutil.rmtree(build_dir)
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