converter.go

package main

import (
        "bufio"
        "fmt"
        "log"
        "os"
        "path/filepath"
        "strings"
)

func visit(path string, f os.FileInfo, err error) error {
        if strings.Contains(path, "dat") {
                fmt.Printf(path + "\n")
                getConvert(path, f)
        }
        //fmt.Printf("Visited: %s\n", path)
        return nil
}

func getConvert(path string, f os.FileInfo) {
        file, _ := os.Open(path)
        scanner := bufio.NewScanner(file)
        var firstLine bool = true
        var firstColumn bool = true
        var lineContext string = ""
        fileb, _ := os.Create(strings.Replace(f.Name(), ".dat", "", -1) + ".csv")
        writer := bufio.NewWriter(fileb)
        for scanner.Scan() {
                if firstLine == false {
                        lineContext = strings.Replace(strings.Replace(scanner.Text(), " ", "", -1), "2013", "2013 ", -1)
                        for _,i := range strings.Split(lineContext,";"){
                                if firstColumn {
                                        writer.WriteString(i)
                                        firstColumn = false
                                }else{
                                        writer.WriteString(";"+strings.Replace(i,".",",",-1))
                                }
                        }

                        writer.WriteString("\n")
                        firstColumn = true
                } else {
                        firstLine = false
                }
        }

        if err := scanner.Err(); err != nil {
                log.Fatal(err)
        }
        writer.Flush()
        file.Close()
}

func main() {
        err := filepath.Walk(".", visit)
        fmt.Printf("filepath.Walk() returned %v\n", err)

}