fix: handle basic auth provided in nomad address

- allow to have a scheme in the address with basic auth
- fix nil point dereference error

internal/cli/helpers.go

@@ -417,14 +417,29 @@ func clientOptsFromCLI(c *baseCommand) *api.Config {
 // format and if it is, it returns user, password and address. It returns "", "",
 // address otherwise.
 func handleBasicAuth(s string) (string, string, string) {
-	before, after, found := strings.Cut(s, "@")
-	if found {
-		user, pass, found := strings.Cut(before, ":")
-		if found {
-			return user, pass, after
-		}
+	beforeAt, afterAt, found := strings.Cut(s, "@")
+	if !found {
+		return "", "", s
+	}
+
+	scheme, userpass, schemeFound := strings.Cut(beforeAt, "//")
+	if !schemeFound {
+		userpass = beforeAt
+	}
+
+	user, pass, found := strings.Cut(userpass, ":")
+	if !found {
+		return "", "", s
 	}
-	return "", "", before
+
+	var addr string
+	if schemeFound {
+		addr = fmt.Sprintf("%s//%s", scheme, afterAt)
+	} else {
+		addr = afterAt
+	}
+
+	return user, pass, addr
 }
 
 // clientOptsFromEnvironment populates api client conf with environment
@@ -434,9 +449,11 @@ func clientOptsFromEnvironment(conf *api.Config) {
 		// we support user:pass@addr here
 		user, pass, addr := handleBasicAuth(v)
 		conf.Address = addr
-		if user != "" && pass != "" {
-			conf.HttpAuth.Username = user
-			conf.HttpAuth.Password = pass
+		if user != "" || pass != "" {
+			conf.HttpAuth = &api.HttpBasicAuth{
+				Username: user,
+				Password: pass,
+			}
 		}
 	}
 	if v := os.Getenv("NOMAD_NAMESPACE"); v != "" {
@@ -471,9 +488,11 @@ func clientOptsFromFlags(c *baseCommand, conf *api.Config) {
 		// we support user:pass@addr here
 		user, pass, addr := handleBasicAuth(cfg.address)
 		conf.Address = addr
-		if user != "" && pass != "" {
-			conf.HttpAuth.Username = user
-			conf.HttpAuth.Password = pass
+		if user != "" || pass != "" {
+			conf.HttpAuth = &api.HttpBasicAuth{
+				Username: user,
+				Password: pass,
+			}
 		}
 	}
 	if cfg.namespace != "" {

internal/cli/helpers_test.go

@@ -0,0 +1,124 @@
+package cli
+
+import (
+	"testing"
+
+	"github.com/hashicorp/nomad/api"
+	"github.com/shoenig/test/must"
+)
+
+func TestHelpers_handleBasicAuth(t *testing.T) {
+	cases := []struct {
+		addr         string
+		expectedUser string
+		expectedPass string
+		expectedAddr string
+	}{
+		{"addr", "", "", "addr"},
+		{"addr:port", "", "", "addr:port"},
+		{"user:pass@addr", "user", "pass", "addr"},
+		{"user:pass@addr:port", "user", "pass", "addr:port"},
+		{"scheme://addr", "", "", "scheme://addr"},
+		{"scheme://user:pass@addr", "user", "pass", "scheme://addr"},
+		{"scheme://user:pass@addr:port", "user", "pass", "scheme://addr:port"},
+		{"scheme://user:@addr:port", "user", "", "scheme://addr:port"},
+		{"scheme://:pass@addr:port", "", "pass", "scheme://addr:port"},
+		{"//user:pass@addr:port", "user", "pass", "//addr:port"},
+		{"foo@bar", "", "", "foo@bar"},
+		{"", "", "", ""},
+	}
+
+	for _, c := range cases {
+		t.Run(c.addr, func(t *testing.T) {
+			user, pass, addr := handleBasicAuth(c.addr)
+
+			must.Eq(t, c.expectedUser, user)
+			must.Eq(t, c.expectedPass, pass)
+			must.Eq(t, c.expectedAddr, addr)
+		})
+	}
+}
+
+func TestHelpers_clientOptsFromEnvironment_Address(t *testing.T) {
+	cases := []struct {
+		name             string
+		addr             string
+		expectedAddress  string
+		expectedHttpAuth *api.HttpBasicAuth
+	}{
+		{
+			addr:             "addr",
+			expectedAddress:  "addr",
+			expectedHttpAuth: nil,
+		},
+		{
+			addr:             "scheme://user:pass@addr",
+			expectedAddress:  "scheme://addr",
+			expectedHttpAuth: &api.HttpBasicAuth{Username: "user", Password: "pass"},
+		},
+		{
+			addr:             "scheme://user:@addr",
+			expectedAddress:  "scheme://addr",
+			expectedHttpAuth: &api.HttpBasicAuth{Username: "user", Password: ""},
+		},
+		{
+			addr:             "scheme://:pass@addr",
+			expectedAddress:  "scheme://addr",
+			expectedHttpAuth: &api.HttpBasicAuth{Username: "", Password: "pass"},
+		},
+	}
+
+	for _, c := range cases {
+		t.Run(c.name, func(t *testing.T) {
+			t.Setenv("NOMAD_ADDR", c.addr)
+
+			conf := api.Config{HttpAuth: nil}
+			clientOptsFromEnvironment(&conf)
+
+			must.Eq(t, c.expectedAddress, conf.Address)
+			must.Eq(t, c.expectedHttpAuth, conf.HttpAuth)
+		})
+	}
+}
+
+func TestHelpers_clientOptsFromFlags_Address(t *testing.T) {
+	cases := []struct {
+		name             string
+		addr             string
+		expectedAddress  string
+		expectedHttpAuth *api.HttpBasicAuth
+	}{
+		{
+			addr:             "addr",
+			expectedAddress:  "addr",
+			expectedHttpAuth: nil,
+		},
+		{
+			addr:             "scheme://user:pass@addr",
+			expectedAddress:  "scheme://addr",
+			expectedHttpAuth: &api.HttpBasicAuth{Username: "user", Password: "pass"},
+		},
+		{
+			addr:             "scheme://user:@addr",
+			expectedAddress:  "scheme://addr",
+			expectedHttpAuth: &api.HttpBasicAuth{Username: "user", Password: ""},
+		},
+		{
+			addr:             "scheme://:pass@addr",
+			expectedAddress:  "scheme://addr",
+			expectedHttpAuth: &api.HttpBasicAuth{Username: "", Password: "pass"},
+		},
+	}
+
+	for _, c := range cases {
+		t.Run(c.name, func(t *testing.T) {
+			cmd := baseCommand{nomadConfig: nomadConfig{address: c.addr}}
+
+			conf := api.Config{HttpAuth: nil}
+			clientOptsFromFlags(&cmd, &conf)
+
+			must.Eq(t, c.expectedAddress, conf.Address)
+			must.Eq(t, c.expectedHttpAuth, conf.HttpAuth)
+		})
+	}
+}