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author | Chris Larson <chris_larson@mentor.com> | 2010-04-09 16:51:09 -0700 |
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committer | Chris Larson <chris_larson@mentor.com> | 2010-04-09 19:38:55 -0700 |
commit | 78f56049ba863b2e585b89db12b32697eb879bbc (patch) | |
tree | 6506c47bb25885519e88b6f2d7f73382e19a7993 /lib/bb/__init__.py | |
parent | afe20ccdd25590a4cf56dd9f65aad91b9b61b801 (diff) | |
download | bitbake-78f56049ba863b2e585b89db12b32697eb879bbc.tar.gz |
Deprecate the usage of certain objects via certain modules
As an example, this displays a deprecation warning for the use of
"bb.encodeurl" when you should be using "bb.fetch.encodeurl". It includes a
convenience function for this purpose. It should be of use when moving
objects between modules permanently, changing the API the user sees.
Signed-off-by: Chris Larson <chris_larson@mentor.com>
Diffstat (limited to 'lib/bb/__init__.py')
-rw-r--r-- | lib/bb/__init__.py | 44 |
1 files changed, 41 insertions, 3 deletions
diff --git a/lib/bb/__init__.py b/lib/bb/__init__.py index 8bda65e19..7c88f650a 100644 --- a/lib/bb/__init__.py +++ b/lib/bb/__init__.py @@ -52,7 +52,45 @@ def fatal(*args): bb.msg.fatal(None, ''.join(args)) +def deprecated(func, name = None, advice = ""): + """This is a decorator which can be used to mark functions + as deprecated. It will result in a warning being emmitted + when the function is used.""" + import warnings + + if advice: + advice = ": %s" % advice + if name is None: + name = func.__name__ + + def newFunc(*args, **kwargs): + warnings.warn("Call to deprecated function %s%s." % (name, + advice), + category = DeprecationWarning, + stacklevel = 2) + return func(*args, **kwargs) + newFunc.__name__ = func.__name__ + newFunc.__doc__ = func.__doc__ + newFunc.__dict__.update(func.__dict__) + return newFunc + # For compatibility -from bb.fetch import MalformedUrl, encodeurl, decodeurl -from bb.utils import mkdirhier, movefile, copyfile, which -from bb.utils import vercmp_string as vercmp +def deprecate_import(current, modulename, fromlist, renames = None): + """Import objects from one module into another, wrapping them with a DeprecationWarning""" + import sys + + module = __import__(modulename, fromlist = fromlist) + for position, objname in enumerate(fromlist): + obj = getattr(module, objname) + newobj = deprecated(obj, "{0}.{1}".format(current, objname), + "Please use {0}.{1} instead".format(modulename, objname)) + if renames: + newname = renames[position] + else: + newname = objname + + setattr(sys.modules[current], newname, newobj) + +deprecate_import(__name__, "bb.fetch", ("MalformedUrl", "encodeurl", "decodeurl")) +deprecate_import(__name__, "bb.utils", ("mkdirhier", "movefile", "copyfile", "which")) +deprecate_import(__name__, "bb.utils", ["vercmp_string"], ["vercmp"]) |