builder/vmware: force LANG=C for ifconfig [GH-592]

CHANGELOG.md

@@ -22,6 +22,7 @@ BUG FIXES:
   [GH-554]
 * builder/openstack: Properly scrub password from logs [GH-554]
 * builder/virtualbox: No panic if SSH host port min/max is the same. [GH-594]
+* builder/vmware: Host IP lookup works for non-C locales. [GH-592]
 * common/uuid: Use cryptographically secure PRNG when generating
   UUIDs. [GH-552]
 * communicator/ssh: File uploads that exceed the size of memory no longer

builder/vmware/host_ip_ifconfig.go

@@ -21,6 +21,12 @@ func (f *IfconfigIPFinder) HostIP() (string, error) {
 	stdout := new(bytes.Buffer)
 
 	cmd := exec.Command(ifconfigPath, f.Device)
+	cmd.Env = append(cmd.Env, os.Environ()...)
+
+	// Force LANG=C so that the output is what we expect it to be
+	// despite the locale.
+	cmd.Env = append(cmd.Env, "LANG=C")
+
 	cmd.Stdout = stdout
 	cmd.Stderr = new(bytes.Buffer)
 	if err := cmd.Run(); err != nil {