Working version 1

san.sh

@@ -0,0 +1,10 @@
+!/usr/bin/env bash
+
+for oname in "$@"; do
+	filen=$(echo "${oname%.*}")
+	exten=$(echo "${oname##*.}")
+	nfilen=$(sanitize "$filen")
+	nexten=$(sanitize "$exten")
+	nname="$nfilen.$nexten"
+	mv -nv "$oname" "$nname"
+done

sanitize.go

@@ -8,10 +8,10 @@ import (
 	"golang.org/x/text/runes"
 	"golang.org/x/text/transform"
 	"golang.org/x/text/unicode/norm"
+	"log"
+	"regexp"
 	"strings"
 	"unicode"
-	"regexp"
-	"log"
 	"os"
 	"fmt"
 )
@@ -20,14 +20,21 @@ func removeIllFormed(input string) (output string) {
 	output, _, _ = transform.String(runes.ReplaceIllFormed(), input)
 	return output
 }
-func replaceNonASCII(input string) (output string) {
-	replaceNonASCII := runes.Map(func(r rune) rune {
-		if !(r <= unicode.MaxASCII) {
+
+func toLower(input string) (output string) {
+
+	output = strings.ToLower(input)
+	return output
+}
+
+func replaceNonAlphaNum(input string) (output string) {
+	replaceNonAlphaNum := runes.Map(func(r rune) rune {
+		if !unicode.IsLetter(r) && !unicode.IsDigit(r) {
 			return '-'
 		}
 		return r
 	})
-	output, _, _ = transform.String(replaceNonASCII, input)
+	output, _, _ = transform.String(replaceNonAlphaNum, input)
 	return output
 }
 
@@ -39,7 +46,18 @@ func removeAccents(input string) (output string) {
 	return output
 }
 
-func replaceSpaces(input string) (output string) {
+/*func replaceNonASCII(input string) (output string) {
+	replaceNonASCII := runes.Map(func(r rune) rune {
+		if !(r <= unicode.MaxASCII) {
+			return '-'
+		}
+		return r
+	})
+	output, _, _ = transform.String(replaceNonASCII, input)
+	return output
+}
+*/
+/*func replaceSpaces(input string) (output string) {
 	replaceSpaces := runes.Map(func(r rune) rune {
 		if unicode.Is(unicode.Space, r) {
 			return '-'
@@ -48,9 +66,9 @@ func replaceSpaces(input string) (output string) {
 	})
 	output, _, _ = transform.String(replaceSpaces, input)
 	return output
-}
+}*/
 
-func replacePunct(input string) (output string) {
+/*func replacePunct(input string) (output string) {
 	replacePunct := runes.Map(func(r rune) rune {
 		if unicode.Is(unicode.Punct, r) {
 			return '-'
@@ -60,7 +78,7 @@ func replacePunct(input string) (output string) {
 	output, _, _ = transform.String(replacePunct, input)
 	return output
 }
-
+*/
 func dedupHyp(input string) (output string) {
 	reg, err := regexp.Compile("-{2,}")
 	if err != nil {
@@ -77,7 +95,18 @@ func trimEnds(input string) (output string) {
 	return output
 }
 
+func sanitize(input string) (output string){
+output = trimEnds(dedupHyp(replaceNonAlphaNum(removeAccents(toLower(removeIllFormed(input))))))
+return output
+}
+
 func main() {
-	input := strings.ToLower(strings.Join(os.Args[1:], " "))
-	fmt.Println(trimEnds(dedupHyp(replacePunct(replaceSpaces(removeAccents(strings.ToLower(replaceNonASCII(removeIllFormed(input)))))))))
+
+		input := strings.Join(os.Args[1:], "-")
+
+/*	const input string = "Golang basics - writing unit tests"*/
+	/*	fmt.Println(trimEnds(dedupHyp(replacePunct(replaceSpaces(removeAccents(strings.ToLower(replaceNonASCII(removeIllFormed(input)))))))))*/
+
+	fmt.Println(sanitize(input))
+
 }