better handling of version/patch especiallly for snapshots, use updateWorkDir

cmd/utils.go

@@ -8,6 +8,7 @@ import (
 	"sort"
 	"bufio"
 	"errors"
+	"regexp"
 	"os/exec"
 	"reflect"
 	"strconv"
@@ -1110,13 +1111,10 @@ func getDevfsRuleset(ruleset int) []string {
 	if err != nil {
 		return []string{}
 	}
-	// Get rid of the last "\n"
-	return strings.Split(out, "\n")[:len(strings.Split(out, "\n"))-1]
+	return strings.Split(out, "\n")[:len(strings.Split(out, "\n"))]
 }
 
 func copyDevfsRuleset(ruleset int, srcrs int) error {
-	// Resulting ruleset as an array of line
-	//var result []string
 	out := getDevfsRuleset(srcrs)
 	for _, line := range out {
 		//fields := strings.Fields(line)
@@ -1287,6 +1285,36 @@ func setJailConfigUpdated(jail *Jail) error {
 	return nil
 }
 
+func freebsdVersionToStruct(rawVersion string) (FreeBSDVersion, error) {
+	var version FreeBSDVersion
+	var err error
+
+	regex := `([0-9]{1,2})(\.)?([0-9]{1,2})?\-([^\-]*)(\-)?(p[0-9]{1,2})?`
+
+	re := regexp.MustCompile(regex)
+
+	if re.MatchString(rawVersion) {
+		version.major, err = strconv.Atoi(re.FindStringSubmatch(rawVersion)[1])
+		if err != nil {
+			return version, err
+		}
+		version.minor, err = strconv.Atoi(re.FindStringSubmatch(rawVersion)[3])
+		if err != nil {
+			return version, err
+		}
+		version.flavor = strings.Trim(re.FindStringSubmatch(rawVersion)[4], "\n")
+
+		// Skip the 'p' starting patch level
+		if len(re.FindStringSubmatch(rawVersion)[6]) > 0 {
+			version.patchLevel, err = strconv.Atoi(re.FindStringSubmatch(rawVersion)[6][1:])
+			if err != nil {
+				return version, err
+			}
+		}
+	}
+	return version, nil
+}
+
 func getVersion(jail *Jail) (string, error) {
 	cvers, err := executeCommand(fmt.Sprintf("%s/bin/freebsd-version", jail.RootPath))
 	if err != nil {