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| -rw-r--r-- | meta/classes/distrooverrides.bbclass | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/meta/classes/distrooverrides.bbclass b/meta/classes/distrooverrides.bbclass new file mode 100644 index 0000000000..9a42712f20 --- /dev/null +++ b/meta/classes/distrooverrides.bbclass @@ -0,0 +1,32 @@ +# Turns certain DISTRO_FEATURES into overrides with the same +# name plus a df- prefix. Ensures that these special +# distro features remain set also for native and nativesdk +# recipes, so that these overrides can also be used there. +# +# This makes it simpler to write .bbappends that only change the +# task signatures of the recipe if the change is really enabled, +# for example with: +# do_install_append_df-my-feature () { ... } +# where "my-feature" is a DISTRO_FEATURE. +# +# The class is meant to be used in a layer.conf or distro +# .inc file with: +# INHERIT += "distrooverrides" +# DISTRO_FEATURES_OVERRIDES += "my-feature" +# +# Beware that this part of OVERRIDES changes during parsing, so usage +# of these overrides should be limited to .bb and .bbappend files, +# because then DISTRO_FEATURES is final. + +DISTRO_FEATURE_OVERRIDES ?= "" +DISTRO_FEATURE_OVERRIDES[doc] = "A space-separated list of <feature> entries. \ +Each entry is added to OVERRIDES as df-<feature> if <feature> is in DISTRO_FEATURES." + +DISTRO_FEATURES_FILTER_NATIVE_append = " ${DISTRO_FEATURES_OVERRIDES}" +DISTRO_FEATURES_FILTER_NATIVESDK_append = " ${DISTRO_FEATURES_OVERRIDES}" + +# If DISTRO_FEATURES_OVERRIDES or DISTRO_FEATURES show up in a task +# signature because of this line, then the task dependency on +# OVERRIDES itself should be fixed. Excluding these two variables +# with DISTROOVERRIDES[vardepsexclude] would just work around the problem. +DISTROOVERRIDES .= "${@ ''.join([':df-' + x for x in sorted(set(d.getVar('DISTRO_FEATURES_OVERRIDES').split()) & set((d.getVar('DISTRO_FEATURES') or '').split()))]) }" |