util: add normalize function

This function remove all non alpha numerical characters from a string
and substitute this characters with one -

So HELLO%%/$&/)%$%(&&HH becomes hello-hh

Signed-off-by: Jonatan Schlag <jonatan.schlag@ipfire.org>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

diff --git a/src/functions/functions.util b/src/functions/functions.util
index f096fbb79cac8e8e6ad99abfde7cf829b64ffce8..dff0b90789183a5242392456660708a9d4f01ab8 100644 (file)
--- a/src/functions/functions.util
+++ b/src/functions/functions.util
@@ -850,3 +850,9 @@ copy() {
                return ${EXIT_ERROR}
        fi
 }
+
+normalize() {
+       local string="$@"
+
+       tr -sc [:alnum:] "-" < <(printf "%s" "${string,,}")
+}