vcsh: list_untracked(): Avoid `cut`; speed up `-r`

Avoid spawning `cut` and speed recursive mode up from "takes several seconds on a
current machine" to "instant".

Thanks to Thorsten Glaser.

diff --git a/vcsh b/vcsh
index a374f05b4c74d710116f50eb3b6a11575f236299..1d947d1ae920db1a81e76be3a86bf5a700ff4e25 100755 (executable)
--- a/vcsh
+++ b/vcsh
@@ -306,7 +306,7 @@ list_untracked() {
                git ls-files --others "$directory_opt" | (
                        while read line; do
                                echo "$line"
-                               directory_component="$(echo "$line" | cut -d'/' -f1)"
+                               directory_component=${line%%/*}
                                [ -d "$directory_component" ] && printf '%s/\n' "$directory_component"
                        done
                        ) | sort -u > $temp_file_others