actually move files using git mv

main.go

@@ -1,9 +1,10 @@
 package main
 
 import (
-"fmt"
-	"path/filepath"
+	"fmt"
 	"io/fs"
+	"os/exec"
+	"path/filepath"
 	"regexp"
 )
 
@@ -13,12 +14,22 @@ func main() {
 	if err != nil {
 		panic(err)
 	}
-	filepath.Walk(dir, func(path string, info fs.FileInfo, err error) error{
+	filepath.Walk(dir, func(path string, info fs.FileInfo, err error) error {
 		path = path[len(dir):]
 		matches := journalRegex.FindStringSubmatch(path)
-		if len(matches) > 0 {
-			fmt.Println(path)
-			fmt.Println(matches[1]+"/"+matches[2]+" - "+ matches[3]+"/"+matches[1]+"-"+matches[2]+"-"+matches[4] + " - " + matches[5])
+		if len(matches) == 0 {
+			return nil
+		}
+
+		year, month := matches[1], matches[2]
+		monthName := matches[3]
+		day, title := matches[4], matches[5]
+		newPath := fmt.Sprintf("%s/%s - %s/%s-%s-%s - %s", year, month, monthName, year, month, day, title)
+		mvCommand := exec.Command("git", "mv", path, newPath)
+		mvCommand.Dir = dir
+		output, err := mvCommand.CombinedOutput()
+		if err != nil {
+			fmt.Printf("error moving '%s' to '%s':\n%s\n\n", path, newPath, output)
 		}
 		return nil
 	})