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Introduce --enable-x and fail if it is given and x is not available.

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This commit is contained in:
Michał Górny 2013-05-31 00:08:04 +02:00
parent 570c2adeaf
commit e09580e12c
1 changed files with 19 additions and 0 deletions
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19
setup.py
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@ -96,7 +96,10 @@ class pil_build_ext(build_ext):
class feature:
zlib = jpeg = tiff = freetype = tcl = tk = lcms = webp = None
required = []
def require(self, feat):
return feat in self.required
def want(self, feat):
return getattr(self, feat) is None
@ -110,18 +113,28 @@ class pil_build_ext(build_ext):
user_options = build_ext.user_options + [
('disable-%s' % x, None, 'Disable support for %s' % x)
for x in feature
] + [
('enable-%s' % x, None, 'Enable support for %s' % x)
for x in feature
]
def initialize_options(self):
build_ext.initialize_options(self)
for x in self.feature:
setattr(self, 'disable_%s' % x, None)
setattr(self, 'enable_%s' % x, None)
def finalize_options(self):
build_ext.finalize_options(self)
for x in self.feature:
if getattr(self, 'disable_%s' % x):
setattr(self.feature, x, False)
if getattr(self, 'enable_%s' % x):
raise ValueError(
'Conflicting options: --enable-%s and --disable-%s'
% (x, x))
if getattr(self, 'enable_%s' % x):
self.feature.required.append(x)
def build_extensions(self):
@ -325,6 +338,12 @@ class pil_build_ext(build_ext):
if _find_library_file(self, "webp"): # in googles precompiled zip it is call "libwebp"
feature.webp = "webp"
for f in feature:
if not getattr(feature, f) and feature.require(f):
raise ValueError(
'--enable-%s requested but %s not found, aborting.'
% (f, f))
#
# core library