Use lua for some scriptlets to avoid missing /bin/sh

SPECS/sphere-release.spec

@@ -6,7 +6,7 @@
 
 Name:           sphere-release
 Version:        %{major}.%{minor}
-Release:        7%{?dist}.1
+Release:        8%{?dist}
 Summary:        %{distro} release files
 License:        GPLv2
 URL:            https://msvsphere-os.ru
@@ -113,7 +113,6 @@ RemovePathPostfixes: .Server
 Provides:       sphere-release-identity = %{version}-%{release}
 Conflicts:      sphere-release-identity
 Requires: sphere-release-server = %{version}-%{release}
-Requires(pre):  /usr/bin/ln
 
 
 %description identity-server
@@ -149,8 +148,6 @@ RemovePathPostfixes: .ARM
 Provides:       sphere-release-identity = %{version}-%{release}
 Conflicts:      sphere-release-identity
 Requires: sphere-release-arm = %{version}-%{release}
-Requires(pre):  /usr/bin/ln
-
 
 %description identity-arm
 Provides the necessary files for a MSVSphere installation that is identifying
@@ -349,13 +346,12 @@ install -p -m 0644 %{SOURCE509} %{buildroot}%{_sysconfdir}/yum.repos.d/
 install -d -m 0755 %{buildroot}%{_sysconfdir}/pki/rpm-gpg
 install -p -m 0644 %{SOURCE100} %{buildroot}%{_sysconfdir}/pki/rpm-gpg/
 
-%pre -n sphere-release-common
-# Workarround for redhat-server-eula problem
-if [ $1 = 1 ]; then
-    if [ -d /usr/share/redhat-release ]; then
-        rm -rf /usr/share/redhat-release
-    fi
-fi
+%pre -p <lua> -n sphere-release-common
+st = posix.stat("/usr/share/redhat-release")
+if st and st.type == "directory" then
+  os.remove("/usr/share/redhat-release")
+end
+return 0
 
 %post -n sphere-repos-flatpak
 /usr/bin/flatpak remote-add --system --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo ||:
@@ -365,18 +361,14 @@ fi
 /usr/bin/flatpak remote-delete --system flathub ||:
 /usr/bin/flatpak remote-delete --system fedora ||:
 
-%post identity-arm
-pushd /usr/share/sphere-release/ > /dev/null 2>&1
-ln -sf EULA-ARM EULA ||:
-popd > /dev/null 2>&1
+%post -p <lua> identity-arm
+posix.symlink("/usr/share/sphere-release/EULA-ARM", "/usr/share/sphere-release/EULA")
 
 %preun identity-arm
 /usr/bin/rm -f /usr/share/sphere-release/EULA
 
-%post identity-server
-pushd /usr/share/sphere-release/ > /dev/null 2>&1
-ln -sf EULA-SERVER EULA ||:
-popd > /dev/null 2>&1
+%post -p <lua> identity-server
+posix.symlink("/usr/share/sphere-release/EULA-SERVER", "/usr/share/sphere-release/EULA")
 
 %preun identity-server
 /usr/bin/rm -f /usr/share/sphere-release/EULA
@@ -446,8 +438,8 @@ popd > /dev/null 2>&1
 
 
 %changelog
-* Mon Mar 18 2024 Arkady L. Shane <tigro@msvsphere-os.ru> - 8.9-7.1
-- Return 0
+* Mon Mar 18 2024 Arkady L. Shane <tigro@msvsphere-os.ru> - 8.9-8
+- Use lua for some scriptlets to avoid missing /bin/sh
 
 * Mon Mar 18 2024 Arkady L. Shane <tigro@msvsphere-os.ru> - 8.9-7
 - Fix link creation (strange bug during installation)