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authorRichard Purdie <richard.purdie@linuxfoundation.org>2011-05-07 08:49:28 +0100
committerRichard Purdie <richard.purdie@linuxfoundation.org>2011-05-07 08:49:28 +0100
commit506241c914383c20561144069ba0b0d3850ce8cc (patch)
treec9cdad2c80916378236fde989464558a2bd853b1 /bitbake
parent0788081ac7a04f94c349b2673ed6ae122aa7d1a8 (diff)
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bitbake: Add missing file
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Diffstat (limited to 'bitbake')
-rw-r--r--bitbake/lib/bb/compat.py28
1 files changed, 28 insertions, 0 deletions
diff --git a/bitbake/lib/bb/compat.py b/bitbake/lib/bb/compat.py
new file mode 100644
index 0000000000..c6978fccc5
--- /dev/null
+++ b/bitbake/lib/bb/compat.py
@@ -0,0 +1,28 @@
+"""Code pulled from future python versions, here for compatibility"""
+
+def total_ordering(cls):
+ """Class decorator that fills in missing ordering methods"""
+ convert = {
+ '__lt__': [('__gt__', lambda self, other: other < self),
+ ('__le__', lambda self, other: not other < self),
+ ('__ge__', lambda self, other: not self < other)],
+ '__le__': [('__ge__', lambda self, other: other <= self),
+ ('__lt__', lambda self, other: not other <= self),
+ ('__gt__', lambda self, other: not self <= other)],
+ '__gt__': [('__lt__', lambda self, other: other > self),
+ ('__ge__', lambda self, other: not other > self),
+ ('__le__', lambda self, other: not self > other)],
+ '__ge__': [('__le__', lambda self, other: other >= self),
+ ('__gt__', lambda self, other: not other >= self),
+ ('__lt__', lambda self, other: not self >= other)]
+ }
+ roots = set(dir(cls)) & set(convert)
+ if not roots:
+ raise ValueError('must define at least one ordering operation: < > <= >=')
+ root = max(roots) # prefer __lt__ to __le__ to __gt__ to __ge__
+ for opname, opfunc in convert[root]:
+ if opname not in roots:
+ opfunc.__name__ = opname
+ opfunc.__doc__ = getattr(int, opname).__doc__
+ setattr(cls, opname, opfunc)
+ return cls