Make getLocalIP public function so Podman can use it

[NO NEW TESTS NEEDED]

Signed-off-by: Daniel J Walsh <[email protected]>

pkg/util/util.go

@@ -2,6 +2,7 @@ package util
 
 import (
 	"io/ioutil"
+	"net"
 	"os"
 	"path/filepath"
 	"strings"
@@ -79,3 +80,20 @@ func DiscoverContainerfile(path string) (foundCtrFile string, err error) {
 
 	return foundCtrFile, nil
 }
+
+// LocalIP returns the non loopback local IP of the host
+func LocalIP() string {
+	addrs, err := net.InterfaceAddrs()
+	if err != nil {
+		return ""
+	}
+	for _, address := range addrs {
+		// check the address type and if it is not a loopback the display it
+		if ipnet, ok := address.(*net.IPNet); ok && !ipnet.IP.IsLoopback() {
+			if ipnet.IP.To4() != nil {
+				return ipnet.IP.String()
+			}
+		}
+	}
+	return ""
+}

run_linux.go

@@ -29,6 +29,7 @@ import (
 	"github.com/containers/buildah/pkg/overlay"
 	"github.com/containers/buildah/pkg/parse"
 	"github.com/containers/buildah/pkg/sshagent"
+	butil "github.com/containers/buildah/pkg/util"
 	"github.com/containers/buildah/util"
 	"github.com/containers/common/pkg/capabilities"
 	"github.com/containers/common/pkg/chown"
@@ -719,23 +720,7 @@ func (b *Builder) generateHosts(rdir, hostname string, addHosts []string, chownO
 	hosts.Write([]byte(fmt.Sprintf("127.0.0.1   %s %s\n", b.Container, hostname)))
 	hosts.Write([]byte(fmt.Sprintf("::1         %s %s\n", b.Container, hostname)))
 
-	// getLocalIP returns the non loopback local IP of the host
-	getLocalIP := func() string {
-		addrs, err := net.InterfaceAddrs()
-		if err != nil {
-			return ""
-		}
-		for _, address := range addrs {
-			// check the address type and if it is not a loopback the display it
-			if ipnet, ok := address.(*net.IPNet); ok && !ipnet.IP.IsLoopback() {
-				if ipnet.IP.To4() != nil {
-					return ipnet.IP.String()
-				}
-			}
-		}
-		return ""
-	}
-	if ip := getLocalIP(); ip != "" {
+	if ip := butil.LocalIP(); ip != "" {
 		hosts.Write([]byte(fmt.Sprintf("%s         %s\n", ip, "host.containers.internal")))
 	}