xfce4-vala: auto-detect vala api version

Get rid of tedious maintenance burden

Signed-off-by: Andreas Müller <schnitzeltony@gmail.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-xfce/recipes-bindings/vala/xfce4-vala/0001-configure.ac-Detect-vapidir-if-not-set-explicitly.patch

@@ -0,0 +1,31 @@
+From 35267d995a81263b98f0ad56399ac3e30f9cf152 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Andreas=20M=C3=BCller?= <schnitzeltony@gmail.com>
+Date: Tue, 30 Apr 2019 09:48:08 +0200
+Subject: [PATCH] configure.ac: Detect vala-api version if not set explicitly
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Upstream-Status: Pending
+
+Signed-off-by: Andreas Müller <schnitzeltony@gmail.com>
+---
+ configure.ac | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/configure.ac b/configure.ac
+index 9bf4230..c489385 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -38,7 +38,7 @@ AC_ARG_WITH([vala-api],
+ 		AC_HELP_STRING([--with-vala-api=VERSION],
+ 				[Use Vala API version VERSION]),
+ 		[vala_api=$withval],
+-		[vala_api='0.16'])
++		[vala_api=`$PKG_CONFIG --variable=vapidir_versioned vapigen | sed -e 's:.*vala-::' -e s:/vapi::`])
+ M8T_CHECK_VALA([$vala_api])
+ AC_ARG_WITH([default-vapidir],
+ 		AC_HELP_STRING([--with-default-vapidir],
+-- 
+2.20.1
+

meta-xfce/recipes-bindings/vala/xfce4-vala_4.10.3.bb

@@ -7,12 +7,13 @@ inherit xfce pkgconfig distro_features_check
 
 REQUIRED_DISTRO_FEATURES = "x11"
 
-SRC_URI = "http://archive.xfce.org/src/bindings/${BPN}/${@xfce_verdir("${PV}")}/${BPN}-${PV}.tar.bz2"
+SRC_URI = " \
+    http://archive.xfce.org/src/bindings/${BPN}/${@xfce_verdir("${PV}")}/${BPN}-${PV}.tar.bz2 \
+    file://0001-configure.ac-Detect-vapidir-if-not-set-explicitly.patch \
+"
 SRC_URI[md5sum] = "0bbb1d6e473e0fe9b335b7b1b49d8a71"
 SRC_URI[sha256sum] = "07a8f2b7c09fcdd3d86e0c52adea3c58ca011d0142a93997a01b4af77260ae7b"
 
-EXTRA_OECONF = "-with-vala-api=0.42"
-
 FILES_${PN} += "${datadir}/vala-*/vapi"
 
 RDEPENDS_${PN} = "vala"