distutils-r1.eclass: Add pyproject.toml support

Signed-off-by: Michał Górny <mgorny@gentoo.org>

diff --git a/eclass/distutils-r1.eclass b/eclass/distutils-r1.eclass
index e546aadfa4a7028d4d38400bc65090ca78394e9d..27ca236ccf5f302411ebf4e6ca3d9571d6528a95 100644 (file)
--- a/eclass/distutils-r1.eclass
+++ b/eclass/distutils-r1.eclass
@@ -86,6 +86,8 @@ esac
 # - no -- do not add the dependency (pure distutils package)
 # - bdepend -- add it to BDEPEND (the default)
 # - rdepend -- add it to BDEPEND+RDEPEND (when using entry_points)
+# - pyproject.toml -- use pyproject2setuptools to install a project
+#                     using pyproject.toml (flit, poetry...)
 # - manual -- do not add the depedency and suppress the checks
 #             (assumes you will take care of doing it correctly)
 #
@@ -135,6 +137,9 @@ _distutils_set_globals() {
                        bdep+=" ${sdep}"
                        rdep+=" ${sdep}"
                        ;;
+               pyproject.toml)
+                       bdep+=" dev-python/pyproject2setuppy[${PYTHON_USEDEP}]"
+                       ;;
                *)
                        die "Invalid DISTUTILS_USE_SETUPTOOLS=${DISTUTILS_USE_SETUPTOOLS}"
                        ;;
@@ -457,6 +462,7 @@ distutils_enable_tests() {
 _distutils_verify_use_setuptools() {
        [[ ${DISTUTILS_OPTIONAL} ]] && return
        [[ ${DISTUTILS_USE_SETUPTOOLS} == manual ]] && return
+       [[ ${DISTUTILS_USE_SETUPTOOLS} == pyproject.toml ]] && return
 
        # ok, those are cheap greps.  we can try toimprove them if we hit
        # false positives.
@@ -580,6 +586,28 @@ _distutils-r1_disable_ez_setup() {
        fi
 }
 
+# @FUNCTION: _distutils-r1_handle_pyproject_toml
+# @INTERNAL
+# @DESCRIPTION:
+# Generate setup.py for pyproject.toml if requested.
+_distutils-r1_handle_pyproject_toml() {
+       if [[ ! -f setup.py && -f pyproject.toml ]]; then
+               if [[ ${DISTUTILS_USE_SETUPTOOLS} == pyproject.toml ]]; then
+                       cat > setup.py <<-EOF || die
+                               #!/usr/bin/env python
+                               from pyproject2setuppy.main import main
+                               main()
+                       EOF
+                       chmod +x setup.py || die
+               else
+                       eerror "No setup.py found but pyproject.toml is present.  In order to enable"
+                       eerror "pyproject.toml support in distutils-r1, set:"
+                       eerror "  DISTUTILS_USE_SETUPTOOLS=pyproject.toml"
+                       die "No setup.py found and DISTUTILS_USE_SETUPTOOLS!=pyproject.toml"
+               fi
+       fi
+}
+
 # @FUNCTION: distutils-r1_python_prepare_all
 # @DESCRIPTION:
 # The default python_prepare_all(). It applies the patches from PATCHES
@@ -608,6 +636,7 @@ distutils-r1_python_prepare_all() {
        fi
 
        _distutils-r1_disable_ez_setup
+       _distutils-r1_handle_pyproject_toml
 
        if [[ ${DISTUTILS_IN_SOURCE_BUILD} && ! ${DISTUTILS_SINGLE_IMPL} ]]
        then