[gentoo-dev] [PATCH 3/7] python-utils-r1.eclass: Obtain include directory from the interpreter

["Michał Górny" <mgorny@gentoo.org>]

Obtain the Python include directory using the distutils.sysconfig module
of the Python interpreter rather than hardcoding values for it. This
makes the code more maintainable, and clears the way for re-enabling
ABIFLAGS on new Python versions.
---
 eclass/python-utils-r1.eclass   | 21 +++++++--------------
 eclass/tests/python-utils-r1.sh | 17 +++++++++++++----
 2 files changed, 20 insertions(+), 18 deletions(-)

diff --git a/eclass/python-utils-r1.eclass b/eclass/python-utils-r1.eclass
index 69166cf..a0274f6 100644
--- a/eclass/python-utils-r1.eclass
+++ b/eclass/python-utils-r1.eclass
@@ -138,6 +138,7 @@ _python_impl_supported() {
 # The path to Python include directory.
 #
 # Set and exported on request using python_export().
+# Requires a proper build-time dependency on the Python implementation.
 #
 # Example value:
 # @CODE
@@ -279,21 +280,13 @@ python_export() {
 				debug-print "${FUNCNAME}: PYTHON_SITEDIR = ${PYTHON_SITEDIR}"
 				;;
 			PYTHON_INCLUDEDIR)
-				local dir
-				case "${impl}" in
-					python*)
-						dir=/usr/include/${impl}
-						;;
-					pypy|pypy3)
-						dir=/usr/$(get_libdir)/${impl}/include
-						;;
-					*)
-						die "${impl} lacks header files"
-						;;
-				esac
-
-				export PYTHON_INCLUDEDIR=${EPREFIX}${dir}
+				export PYTHON_INCLUDEDIR=$("${PYTHON}" -c 'import distutils.sysconfig; print(distutils.sysconfig.get_python_inc())')
 				debug-print "${FUNCNAME}: PYTHON_INCLUDEDIR = ${PYTHON_INCLUDEDIR}"
+
+				# Jython gives a non-existing directory
+				if [[ ! -d ${PYTHON_INCLUDEDIR} ]]; then
+					die "${impl} does not install any header files!"
+				fi
 				;;
 			PYTHON_LIBPATH)
 				local libname
diff --git a/eclass/tests/python-utils-r1.sh b/eclass/tests/python-utils-r1.sh
index bd05e9e..dc6676b 100755
--- a/eclass/tests/python-utils-r1.sh
+++ b/eclass/tests/python-utils-r1.sh
@@ -64,7 +64,9 @@ inherit python-utils-r1
 test_var EPYTHON python2_7 python2.7
 test_var PYTHON python2_7 /usr/bin/python2.7
 test_var PYTHON_SITEDIR python2_7 /usr/lib/python2.7/site-packages
-test_var PYTHON_INCLUDEDIR python2_7 /usr/include/python2.7
+if [[ -x /usr/bin/python2.7 ]]; then
+	test_var PYTHON_INCLUDEDIR python2_7 /usr/include/python2.7
+fi
 test_var PYTHON_LIBPATH python2_7 /usr/lib/libpython2.7$(get_libname)
 test_var PYTHON_PKG_DEP python2_7 '*dev-lang/python*:2.7'
 test_var PYTHON_SCRIPTDIR python2_7 /usr/lib/python-exec/python2.7
@@ -72,7 +74,10 @@ test_var PYTHON_SCRIPTDIR python2_7 /usr/lib/python-exec/python2.7
 test_var EPYTHON python3_4 python3.4
 test_var PYTHON python3_4 /usr/bin/python3.4
 test_var PYTHON_SITEDIR python3_4 /usr/lib/python3.4/site-packages
-test_var PYTHON_INCLUDEDIR python3_4 /usr/include/python3.4
+if [[ -x /usr/bin/python3.4 ]]; then
+	abiflags=$(/usr/bin/python3.4 -c 'import sysconfig; print(sysconfig.get_config_var("ABIFLAGS"))')
+	test_var PYTHON_INCLUDEDIR python3_4 "/usr/include/python3.4${abiflags}"
+fi
 test_var PYTHON_LIBPATH python3_4 /usr/lib/libpython3.4$(get_libname)
 test_var PYTHON_PKG_DEP python3_4 '*dev-lang/python*:3.4'
 test_var PYTHON_SCRIPTDIR python3_4 /usr/lib/python-exec/python3.4
@@ -86,14 +91,18 @@ test_var PYTHON_SCRIPTDIR jython2_7 /usr/lib/python-exec/jython2.7
 test_var EPYTHON pypy pypy
 test_var PYTHON pypy /usr/bin/pypy
 test_var PYTHON_SITEDIR pypy /usr/lib/pypy/site-packages
-test_var PYTHON_INCLUDEDIR pypy /usr/lib/pypy/include
+if [[ -x /usr/bin/pypy ]]; then
+	test_var PYTHON_INCLUDEDIR pypy "/usr/lib*/pypy/include"
+fi
 test_var PYTHON_PKG_DEP pypy '*virtual/pypy*:0='
 test_var PYTHON_SCRIPTDIR pypy /usr/lib/python-exec/pypy
 
 test_var EPYTHON pypy3 pypy3
 test_var PYTHON pypy3 /usr/bin/pypy3
 test_var PYTHON_SITEDIR pypy3 /usr/lib/pypy3/site-packages
-test_var PYTHON_INCLUDEDIR pypy3 /usr/lib/pypy3/include
+if [[ -x /usr/bin/pypy3 ]]; then
+	test_var PYTHON_INCLUDEDIR pypy3 /usr/lib/pypy3/include
+fi
 test_var PYTHON_PKG_DEP pypy3 '*virtual/pypy3*:0='
 test_var PYTHON_SCRIPTDIR pypy3 /usr/lib/python-exec/pypy3
 
-- 
2.6.3