common/hooks: add hook to check python dependencies

common/hooks/pre-pkg/07-python-requires.sh

@@ -0,0 +1,52 @@
+# This hook executes the following tasks:
+#	- checks if python requires are satisfied
+
+hook() {
+	local requires= pver= req= reqname= modules= module= cmp=;
+
+	if [ -e "$wrksrc/requirements.txt" ]; then
+		requires=$(grep -v "^#.*" "$wrksrc/requirements.txt")
+	elif [ -e "$wrksrc/setup.py" ]; then
+		pver=${python_versions%% *}
+	requires=$( ( cd "$wrksrc"; python$pver -c 'import setup; print("\n".join(setup.params["install_requires"]))') )
+	else
+		return 0
+	fi
+
+	# reads all dependencies and creates a list of modules
+	modules=$(for dep in $depends; do
+		(
+			local _name=
+
+			setup_pkg "$dep" "$XBPS_CROSS_BUILD" ignore-problems
+			if [ -h "$XBPS_SRCPKGDIR/${pkgname}" ]; then
+				"${pkgname}_package"
+			fi
+
+			printf "%s:%s:" ${pkgname}-${version}_${revision} "$pkgname"
+			for _name in ${pycompile_module}; do
+				_name="${_name//\//.}"
+				printf "%s:" "${_name%.py}"
+			done
+			echo
+		)
+	done)
+
+	# checks if all requires are satisfied by the depending modules
+	for i in $requires; do
+		req=${i/;*/}
+		if ! reqname="$($XBPS_UHELPER_CMD getpkgdepname "${req}")"; then
+			reqname=$_tmpreq
+		fi
+
+		if ! module=$(echo "$modules" | grep ":$reqname:"); then
+			msg_warn "Python Dependency $req not found\n"
+			msg_warn "  Full pattern: ${i}\n"
+			continue
+		fi
+		cmp=$(echo "$req" | sed "s/[^<>=]*/$($XBPS_UHELPER_CMD getpkgname "${module%%:*}")/")
+		if $XBPS_UHELPER_CMD pkgmatch "${module%%:*}" "$cmp"; then
+			msg_warn "Python Dependency version mismatch: $cmp => ${module%%:*}\n"
+		fi
+	done
+}