Allows to inherit that in packages containing Python extensions but still 
tightly
control packaging of those extensions. Mainly for the cases where you want
those python modules/extensions/parts to be packaged separately from the main
package in order not to introduce python dependency where you don't need it.
Technically, you can do it with distutils-common-base, but it might require
more FILES_* work than with python-dir.

Introduce PYTHON_SITEPACKAGES_DIR along the way, site-packages directory is
referenced frequently enough within class files, but some recipes also pack this
directory as

${libdir}/python2.5/site-packages
${libdir}/python2.6/site-packages
${libdir}/python*/site-packages
/usr/lib/python*/site-packages
${libdir}/*/site-packages

all of which are not perfect.

Signed-off-by: Roman I Khimov <khi...@altell.ru>
---
 classes/distutils-common-base.bbclass |   13 ++-----------
 classes/python-dir.bbclass            |   11 +++++++++++
 2 files changed, 13 insertions(+), 11 deletions(-)
 create mode 100644 classes/python-dir.bbclass

diff --git a/classes/distutils-common-base.bbclass 
b/classes/distutils-common-base.bbclass
index 87578b7..b6dce7e 100644
--- a/classes/distutils-common-base.bbclass
+++ b/classes/distutils-common-base.bbclass
@@ -1,19 +1,10 @@
+inherit python-dir
+
 EXTRA_OEMAKE = ""
 
 export STAGING_INCDIR
 export STAGING_LIBDIR
 
-def python_dir(d):
-       import os, bb
-       staging_incdir = bb.data.getVar( "STAGING_INCDIR", d, 1 )
-       for majmin in "2.6 2.5 2.4 2.3".split():
-               if os.path.exists( "%s/python%s" % ( staging_incdir, majmin ) 
): return "python%s" % majmin
-       if not "python-native" in bb.data.getVar( "DEPENDS", d, 1 ).split():
-               raise "No Python in STAGING_INCDIR. Forgot to build 
python-native ?"
-       return "INVALID"
-
-PYTHON_DIR = "$...@python_dir(d)}"
-
 PACKAGES = "${PN}-dev ${PN}-dbg ${PN}-doc ${PN}"
 
 FILES_${PN} = "${bindir}/* ${libdir}/* ${libdir}/${PYTHON_DIR}/*"
diff --git a/classes/python-dir.bbclass b/classes/python-dir.bbclass
new file mode 100644
index 0000000..d631a5c
--- /dev/null
+++ b/classes/python-dir.bbclass
@@ -0,0 +1,11 @@
+def python_dir(d):
+       import os, bb
+       staging_incdir = bb.data.getVar( "STAGING_INCDIR", d, 1 )
+       for majmin in "2.6 2.5 2.4 2.3".split():
+               if os.path.exists( "%s/python%s" % ( staging_incdir, majmin ) 
): return "python%s" % majmin
+       if not "python-native" in bb.data.getVar( "DEPENDS", d, 1 ).split():
+               raise "No Python in STAGING_INCDIR. Forgot to build 
python-native ?"
+       return "INVALID"
+
+PYTHON_DIR = "$...@python_dir(d)}"
+PYTHON_SITEPACKAGES_DIR = "${libdir}/${PYTHON_DIR}/site-packages"
-- 
1.5.6.5


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