[OE-core] [meta-oe][PATCH] meson-with-tests: Allows for build time tests of meson

[Paulo Neves]

meson build system has the functionality of setting
an executable wrapper to run cross-compiled
binaries. The setting is called exe_wrapper and can
be defined in the meson.cross file. With a valid
exe_wrapper meson build system can test if the built
binary is sane.

Another advantage of setting exe_wrapper setting
is that we can run the tests defined in the meson
build system. This way if this class is inherited
not only are the default targets built, their tests
will also run and have an opportunity to fail the
the build at the recipe level if necessary.

The user of this class should not inherit meson
directly but leave it to this class. This class
may later be merged into meson.bbclass itself.

Signed-off-by: Paulo Neves <ptsneves at gmail.com>
---
 meta/classes/meson-with-tests.bbclass | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 meta/classes/meson-with-tests.bbclass

diff --git a/meta/classes/meson-with-tests.bbclass b/meta/classes/meson-with-tests.bbclass
new file mode 100644
index 0000000000..ddaeebc726
--- /dev/null
+++ b/meta/classes/meson-with-tests.bbclass
@@ -0,0 +1,26 @@
+inherit meson
+
+DEPENDS_append += "qemu-native"
+
+do_write_config_append() {
+  #You need to pass qemu with the sysroot path
+  #arguments, but internally meson uses Popen
+  #so we could try lists of arguments
+  #While passing a list directly in the exe_wrapper
+  #parameter passes the sanity test, it later on
+  #fails in the actual test run with:
+  #TypeError: expect bytes or str, not list
+  #So we create an in here wrapper.
+  cat > ${WORKDIR}/meson_exe_wrapper.sh << EOF
+#!/bin/sh
+qemu-${TARGET_ARCH} -L ${RECIPE_SYSROOT} \$@
+EOF
+
+  chmod u+x ${WORKDIR}/meson_exe_wrapper.sh
+
+  sed "/binaries/a\exe_wrapper = '${WORKDIR}/meson_exe_wrapper.sh'" -i ${WORKDIR}/meson.cross
+}
+
+do_compile_append() {
+  ninja test
+}
-- 
2.14.1