vala: enable the use of vapigen by packages with vala support

Now that gobject-introspection is supported, generation of .vapi
files for develeloping Vala code against gobject-based libraries
should be supported as well.

(From OE-Core rev: 1e2739169fe0db8c6727f3c17dc79e3846033d62)

Signed-off-by: Alexander Kanavin <alexander.kanavin@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 34 insertions, 0 deletions

diff --git a/meta/recipes-devtools/vala/vala.inc b/meta/recipes-devtools/vala/vala.inc
index 43f9bb3c3c..2a8875f011 100644
--- a/meta/recipes-devtools/vala/vala.inc
+++ b/meta/recipes-devtools/vala/vala.inc
@@ -3,6 +3,9 @@ DESCRIPTION = "Vala is a C#-like language dedicated to ease GObject programming.
 Vala compiles to plain C and has no runtime environment nor penalities whatsoever."
 SECTION = "devel"
 DEPENDS = "bison-native flex-native libxslt-native glib-2.0"
+
+# vala-native contains a native version of vapigen, which we use instead of the target one
+DEPENDS_append_class-target = " vala-native"
 BBCLASSEXTEND = "native"
 HOMEPAGE = "http://vala-project.org"
 LICENSE = "LGPLv2.1"
@@ -15,3 +18,34 @@ inherit autotools pkgconfig upstream-version-is-even
 
 FILES_${PN} += "${datadir}/${BPN}-${SHRT_VER}/vapi ${libdir}/${BPN}-${SHRT_VER}/"
 FILES_${PN}-doc += "${datadir}/devhelp"
+
+do_configure_prepend_class-target() {
+        # Write out a vapigen wrapper that will be provided by pkg-config file installed in target sysroot
+        # The wrapper will call a native vapigen
+        cat > ${B}/vapigen-wrapper << EOF
+#!/bin/sh
+vapigen-${SHRT_VER} "\$@"
+EOF
+        chmod +x ${B}/vapigen-wrapper
+}
+
+# Vapigen wrapper needs to be available system-wide, because it will be used
+# to build vapi files from all other packages with vala support
+do_install_append_class-target() {
+        install -d ${D}${bindir}/
+        install ${B}/vapigen-wrapper ${D}${bindir}/
+}
+
+
+SYSROOT_PREPROCESS_FUNCS_append_class-target += "vapigen_sysroot_preprocess"
+
+vapigen_sysroot_preprocess() {
+        # Put vapigen wrapper into target sysroot so that it can be used when building vapi files.
+        sysroot_stage_dir ${D}${bindir} ${SYSROOT_DESTDIR}${bindir}
+
+        # Also, tweak the vapigen name in vapigen pkgconfig file, so that it picks up our
+        # wrapper.
+        sed -i \
+           -e "s|vapigen=.*|vapigen=${bindir}/vapigen-wrapper|" \
+           ${SYSROOT_DESTDIR}${datadir}/pkgconfig/vapigen-${SHRT_VER}.pc
+}