imp: work around the possibility of different pre-commit versions

Author: David Arnold

modules/pre-commit.nix

@@ -331,12 +331,20 @@ in
                 ln -s ${configFile} .pre-commit-config.yaml
                 # Remove any previously installed hooks (since pre-commit itself has no convergent design)
                 hooks="pre-commit pre-merge-commit pre-push prepare-commit-msg commit-msg post-checkout post-commit"
+                uninstall_help=$(pre-commit uninstall --help)
+                install_help=$(pre-commit install --help)
                 for hook in $hooks; do
-                  pre-commit uninstall -t $hook
+               	  # different version of pre-commit support different hooks
+               	  [[ "$uninstall_help" =~ "$hook" ]] && pre-commit uninstall -t $hook
                 done
                 # Add hooks for configured stages (only) ...
                 if [ ! -z "${concatStringsSep " " cfg.default_stages}" ]; then
                   for stage in ${concatStringsSep " " cfg.default_stages}; do
+               	    [[ "$stage" == "manual" ]] && continue
+               	    # different version of pre-commit support different hooks
+               	    if [[ ! "$install_help" =~ "$stage" ]];then
+                        echo 1>&2 "WARNING: nix-pre-commit-hooks: '$stage' is not supported by this pre-commit version."
+                        continue
                     case $stage in
                       commit | merge-commit | push)
                         stage="pre-"$stage