fix: logging (#6)

README.md

@@ -8,6 +8,11 @@ current implimentations:
 
 ## Lastpass
 
+Prerequisites:
+
+- [lpass](https://github.com/lastpass/lastpass-cli/blob/master/README.md)
+- [aws-iam-authenticator](https://docs.aws.amazon.com/eks/latest/userguide/install-aws-iam-authenticator.html)
+
 Create an entry in lastpass with username the AWS_ACCESS_KEY_ID and password the AWS_SECRET_ACCESS_KEY
 
 Then configure your kubeconfig as normal but use `aws-iam-authenticator-lpass` as the command
@@ -33,6 +38,4 @@ users:
         - "REPLACE_ME_WITH_YOUR_ROLE_ARN"
 ```
 
-You must still have `aws-iam-authenticator` installed.
-
 See https://github.com/kubernetes-sigs/aws-iam-authenticator for more details

cmd/aws-iam-authenticator-lpass/main.go

@@ -17,10 +17,10 @@ type Entry struct {
 }
 
 func mergeEnv(original, extra []string) []string {
-	m := map[string]string{}
 	if len(extra) == 0 {
 		return original
 	}
+	m := map[string]string{}
 	for _, e := range append(original, extra...) {
 		p := strings.SplitN(e, "=", 2)
 		m[p[0]] = p[1]
@@ -54,8 +54,12 @@ func log(msg ...interface{}) {
 	fmt.Println(msg...)
 }
 
+func errr(msg ...interface{}) {
+	fmt.Fprintln(os.Stdout, msg...)
+}
+
 func fatal(msg ...interface{}) {
-	log(msg...)
+	errr(msg...)
 	os.Exit(1)
 }
 
@@ -72,7 +76,7 @@ func main() {
 	var entries []Entry
 	err = dec.Decode(&entries)
 	if err != nil {
-		log("Unexpected output from lpass, perhaps multiple entries with same name? Please be more specific")
+		errr("Unexpected output from lpass, perhaps multiple entries with same name? Please be more specific")
 		fatal(string(out))
 	}
 	accessKey := entries[0].Username