package main import ( "fmt" "os" "bufio" "regexp" "strings" "log" ) type Config struct { host string port string paste_dir string templ_dir string log_fname string logger *log.Logger } func (c Config) String() string { var s string s+= "Host: " + c.host + "\n" s+= "Port: " + c.port + "\n" s+= "paste_dir: " + c.paste_dir + "\n" s+= "templ_dir: " + c.templ_dir + "\n" return s } func parse_config (fname string, c *Config) error { f, err := os.Open(fname); if err != nil { return err } r := bufio.NewScanner(f) line := 0 for r.Scan (){ s := r.Text() line += 1 if matched, _ := regexp.MatchString("^([ \t]*)$", s); matched != true { // it's not a blank line if matched, _ := regexp.MatchString("^#", s); matched != true { // This is not a comment... if matched, _ := regexp.MatchString("^([a-z_]+)=.*", s); matched == true { // and contains an assignment fields := strings.Split(s, "=") switch fields[0]{ case "host": c.host = fields[1] case "port": c.port = fields[1] case "paste_dir": c.paste_dir = fields[1] case "templ_dir": c.templ_dir = fields[1] case "log_fname": c.log_fname = fields[1] default: fmt.Fprintf(os.Stderr, "Error reading config file %s at line %d: unknown variable '%s'\n", fname, line, fields[0]) } } else { fmt.Fprintf(os.Stderr, "Error reading config file %s at line %d: unknown statement '%s'\n", fname, line, s) } } } } return nil }