flit_core: add variable to control where pyproject.toml is located

The PEP517[1] pyproject.toml doesn't have to be located at the top-level
of the source tree (for example, in recipes with multiple components), so
add a variable PEP517_SOURCE_PATH to set where the file is.

In the future there should be a pep517.bbclass to centralise the common
logic, but for now this can be defined in each of the relevant classes.

[1] https://www.python.org/dev/peps/pep-0517/

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

diff --git a/meta/classes/flit_core.bbclass b/meta/classes/flit_core.bbclass
index 3481bb50890c4f443ce74c569661f4e07761b238..7b578967a9704874ec8f62f9d265f9fffe44fcce 100644 (file)
--- a/meta/classes/flit_core.bbclass
+++ b/meta/classes/flit_core.bbclass
@@ -6,8 +6,12 @@ flit_core_do_configure () {
     :
 }
 
+# Where to execute the build process from
+PEP517_SOURCE_PATH ?= "${S}"
+
 # TODO: ideally this uses pypa/build
 flit_core_do_compile () {
+    cd ${PEP517_SOURCE_PATH}
     nativepython3 -mflit_core.wheel --outdir ${PIP_INSTALL_DIST_PATH}
 }
 do_compile[cleandirs] += "${PIP_INSTALL_DIST_PATH}"