Install Nix: add createStore()

rm old mkdir $dest/store

Author: Anton-Latukha

scripts/install-nix-from-closure.sh

@@ -630,15 +630,28 @@ installNix() {
             fi
         fi
     }
-}
-
-}
-echo "performing a single-user installation of Nix..." >&2
 
+    createStore() {
+        trap createStoreRevert 1
+        createStoreRevert() {
+            error "
 
+    Script tried to create '$dest/store', but it already exists.
+    We do checks '$dest/store' existence before installation.
+    Probaly something went wrong with the installation script.
 
-mkdir -p $dest/store
+    Please:
+      * gather information of your setup conditions
+      * search does BUG exists
+      * make further actions
+    "
+        }
+        mkdir -p "$dest"/store
+    }
+}
 
+}
+echo "performing a single-user installation of Nix..." >&2
 printf "copying Nix to %s..." "${dest}/store" >&2
 
 for i in $(cd "$self/store" >/dev/null && echo ./*); do