epm-epm_install: do nothing on stable ALT branches (ALT bug 44314)

bin/epm-epm_install

@@ -98,6 +98,15 @@ EOF
 
 epm_epm_install() {
 
+    if [ "$BASEDISTRNAME" = "alt" ] && [ "$DISTRVERSION" != "Sisyphus" ] && [ "$EPMMODE" = "package" ] ; then
+        if __epm_check_if_package_from_repo eepm ; then
+            warning "Using external (Korinf) repo is forbidden for stable ALT branch $DISTRVERSION."
+            info "Check https://bugzilla.altlinux.org/44314 for reasons."
+            info "You can install eepm package from Korinf manually, check instruction at https://eepm.ru"
+            fatal "Do nothing."
+        fi
+    fi
+
     if is_url "$1" ; then
         EPM_KORINF_REPO_URL="$1"
         info "Using $EPM_KORINF_REPO_URL repo ..."