Signed-off-by: Michał Górny <mgo...@gentoo.org>
---
eclass/distutils-r1.eclass | 100 +++++++++++++++++++------------------
1 file changed, 51 insertions(+), 49 deletions(-)
diff --git a/eclass/distutils-r1.eclass b/eclass/distutils-r1.eclass
index 02245424bff6..2eb6e3208082 100644
--- a/eclass/distutils-r1.eclass
+++ b/eclass/distutils-r1.eclass
@@ -1128,65 +1128,67 @@ _distutils-r1_backend_to_key() {
_distutils-r1_get_backend() {
debug-print-function ${FUNCNAME} "$@"
- local build_backend legacy_fallback
+ local build_backend
if [[ -f pyproject.toml ]]; then
# if pyproject.toml exists, try getting the backend from it
# NB: this could fail if pyproject.toml doesn't list one
build_backend=$("${EPYTHON}" -m gpep517 get-backend)
fi
- if [[ -z ${build_backend} && ${DISTUTILS_USE_PEP517} == setuptools &&
- -f setup.py ]]
- then
- # use the legacy setuptools backend as a fallback
- build_backend=setuptools.build_meta:__legacy__
- legacy_fallback=1
- fi
if [[ -z ${build_backend} ]]; then
- die "Unable to obtain build-backend from pyproject.toml"
- fi
-
- if [[ ${DISTUTILS_USE_PEP517} != standalone ]]; then
- # verify whether DISTUTILS_USE_PEP517 was set correctly
- local expected_value=$(_distutils-r1_backend_to_key
"${build_backend}")
- if [[ ${DISTUTILS_USE_PEP517} != ${expected_value} ]]; then
- eerror "DISTUTILS_USE_PEP517 does not match
pyproject.toml!"
- eerror " have:
DISTUTILS_USE_PEP517=${DISTUTILS_USE_PEP517}"
- eerror "expected:
DISTUTILS_USE_PEP517=${expected_value}"
- eerror "(backend: ${build_backend})"
- die "DISTUTILS_USE_PEP517 value incorrect"
+ if [[ ${DISTUTILS_USE_PEP517} == setuptools && -f setup.py ]]
+ then
+ # use the legacy setuptools backend as a fallback
+ echo setuptools.build_meta:__legacy__
+ return
+ else
+ die "Unable to obtain build-backend from pyproject.toml"
fi
+ fi
- # fix deprecated backends up
- local new_backend=
- case ${build_backend} in
- flit.buildapi)
- new_backend=flit_core.buildapi
- ;;
- pdm.pep517.api)
- new_backend=pdm.backend
- ;;
- poetry.masonry.api)
- new_backend=poetry.core.masonry.api
- ;;
- setuptools.build_meta:__legacy__)
- # this backend should only be used as implicit
fallback
- [[ ! ${legacy_fallback} ]] &&
- new_backend=setuptools.build_meta
- ;;
- uv)
- new_backend=uv_build
- ;;
- esac
+ if [[ ${DISTUTILS_USE_PEP517} == standalone ]]; then
+ echo "${build_backend}"
+ return
+ fi
- if [[ -n ${new_backend} ]]; then
- if [[ ! -f ${T}/.distutils_deprecated_backend_warned
]]; then
- eqawarn "${build_backend} backend is
deprecated. Please see:"
- eqawarn
"https://projects.gentoo.org/python/guide/qawarn.html#deprecated-pep-517-backends";
- eqawarn "The eclass will be using
${new_backend} instead."
- > "${T}"/.distutils_deprecated_backend_warned
|| die
- fi
- build_backend=${new_backend}
+ # verify whether DISTUTILS_USE_PEP517 was set correctly
+ local expected_value=$(_distutils-r1_backend_to_key "${build_backend}")
+ if [[ ${DISTUTILS_USE_PEP517} != ${expected_value} ]]; then
+ eerror "DISTUTILS_USE_PEP517 does not match pyproject.toml!"
+ eerror " have: DISTUTILS_USE_PEP517=${DISTUTILS_USE_PEP517}"
+ eerror "expected: DISTUTILS_USE_PEP517=${expected_value}"
+ eerror "(backend: ${build_backend})"
+ die "DISTUTILS_USE_PEP517 value incorrect"
+ fi
+
+ # fix deprecated backends up
+ local new_backend=
+ case ${build_backend} in
+ flit.buildapi)
+ new_backend=flit_core.buildapi
+ ;;
+ pdm.pep517.api)
+ new_backend=pdm.backend
+ ;;
+ poetry.masonry.api)
+ new_backend=poetry.core.masonry.api
+ ;;
+ setuptools.build_meta:__legacy__)
+ # this backend should only be used as implicit fallback
+ new_backend=setuptools.build_meta
+ ;;
+ uv)
+ new_backend=uv_build
+ ;;
+ esac
+
+ if [[ -n ${new_backend} ]]; then
+ if [[ ! -f ${T}/.distutils_deprecated_backend_warned ]]; then
+ eqawarn "${build_backend} backend is deprecated.
Please see:"
+ eqawarn
"https://projects.gentoo.org/python/guide/qawarn.html#deprecated-pep-517-backends";
+ eqawarn "The eclass will be using ${new_backend}
instead."
+ > "${T}"/.distutils_deprecated_backend_warned || die
fi
+ build_backend=${new_backend}
fi
echo "${build_backend}"
