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utils.py: helper function for optional include files

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The main intention is to provide easy-to-use and read helper functions
for including files only when certain distro features are
set. Functionally they are the same as bb.utils.contains and
bb.utils.contains_any.

Distro features are part of the base configuration and thus safe to
use for conditional inclusion in recipes and bbappends, in contrast to
recipe variables which might still change during parsing. Therefore
the check is limited to DISTRO_FEATURES. This is the reason for having
this in OE-core instead of bitbake.

Default values are set so that no redundant parameters have to be
passed for conditional includes. As a secondary usage, the functions
can also be used in boolean checks.

(From OE-Core rev: 13024ce5aae453769b546d5fbe533443aec3d6fd)

Signed-off-by: Patrick Ohly <patrick.ohly@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Patrick Ohly 2017-06-09 15:04:04 +02:00 committed by Richard Purdie
parent 7b95d5d701
commit baeafe6dcc
1 changed files with 40 additions and 0 deletions
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40
meta/lib/oe/utils.py
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@ -126,6 +126,46 @@ def features_backfill(var,d):
if addfeatures:
d.appendVar(var, " " + " ".join(addfeatures))
def all_distro_features(d, features, truevalue="1", falsevalue=""):
"""
Returns truevalue if *all* given features are set in DISTRO_FEATURES,
else falsevalue. The features can be given as single string or anything
that can be turned into a set.
This is a shorter, more flexible version of
bb.utils.contains("DISTRO_FEATURES", features, truevalue, falsevalue, d).
Without explicit true/false values it can be used directly where
Python expects a boolean:
if oe.utils.all_distro_features(d, "foo bar"):
bb.fatal("foo and bar are mutually exclusive DISTRO_FEATURES")
With just a truevalue, it can be used to include files that are meant to be
used only when requested via DISTRO_FEATURES:
require ${@ oe.utils.all_distro_features(d, "foo bar", "foo-and-bar.inc")
"""
return bb.utils.contains("DISTRO_FEATURES", features, truevalue, falsevalue, d)
def any_distro_features(d, features, truevalue="1", falsevalue=""):
"""
Returns truevalue if at least *one* of the given features is set in DISTRO_FEATURES,
else falsevalue. The features can be given as single string or anything
that can be turned into a set.
This is a shorter, more flexible version of
bb.utils.contains_any("DISTRO_FEATURES", features, truevalue, falsevalue, d).
Without explicit true/false values it can be used directly where
Python expects a boolean:
if not oe.utils.any_distro_features(d, "foo bar"):
bb.fatal("foo, bar or both must be set in DISTRO_FEATURES")
With just a truevalue, it can be used to include files that are meant to be
used only when requested via DISTRO_FEATURES:
require ${@ oe.utils.any_distro_features(d, "foo bar", "foo-or-bar.inc")
"""
return bb.utils.contains_any("DISTRO_FEATURES", features, truevalue, falsevalue, d)
def packages_filter_out_system(d):
"""