Support different bash completion options

#1508

Based on the documentation found here
https://www.gnu.org/software/bash/manual/html_node/Commands-For-Completion.html
we do special handling for the cases:
- menu-complete/menu-complete-backward
- insert-completions

Signed-off-by: Marc Khouzam <marc.khouzam@montreal.ca>

bash_completionsV2.go

@@ -138,13 +138,55 @@ __%[1]s_process_completion_results() {
             _filedir -d
         fi
     else
-        __%[1]s_handle_standard_completion_case
+        __%[1]s_handle_completion_types
     fi
 
     __%[1]s_handle_special_char "$cur" :
     __%[1]s_handle_special_char "$cur" =
 }
 
+__%[1]s_handle_completion_types() {
+    __helm_debug "__%[1]s_handle_completion_types: COMP_TYPE is $COMP_TYPE"
+
+    local tab comp
+    tab=$(printf '\t')
+
+    case $COMP_TYPE in
+        37) # Type: menu-complete and menu-complete-backward
+            # If the user requested listing one completion at a time
+            # we must remove the descriptions.
+            # https://github.com/spf13/cobra/issues/1508
+            while IFS='' read -r comp; do
+                # Strip any description
+                comp=${comp%%%%$tab*}
+                # Only consider the completions that match
+                comp=$(compgen -W "$comp" -- "$cur")
+                COMPREPLY+=("$comp")
+            done < <(printf "%%s\n" "${out[@]}")
+            ;;
+
+        42) # Type: insert-completions
+            # If the user requested inserting all completions at once
+            # there is no point in returning more than a single one.
+            # We return the first one that matches
+            while IFS='' read -r comp; do
+                # Strip any description
+                comp=${comp%%%%$tab*}
+                # Only consider the completions that match
+                comp=$(compgen -W "$comp" -- "$cur")
+                if [ -n "$comp" ]; then
+                    COMPREPLY+=("$comp")
+                    break
+                fi
+            done < <(printf "%%s\n" "${out[@]}")
+            ;;
+
+        *) # Type: complete (normal completion)
+            __%[1]s_handle_standard_completion_case
+            ;;
+    esac
+}
+
 __%[1]s_handle_standard_completion_case() {
     local tab comp
     tab=$(printf '\t')