TUN-3476: Fix conversion to string and int slice

cmd/cloudflared/config/configuration.go

@@ -263,8 +263,16 @@ func (c *configFileSettings) String(name string) (string, error) {
 
 func (c *configFileSettings) StringSlice(name string) ([]string, error) {
 	if raw, ok := c.Settings[name]; ok {
-		if v, ok := raw.([]string); ok {
-			return v, nil
+		if slice, ok := raw.([]interface{}); ok {
+			strSlice := make([]string, len(slice))
+			for i, v := range slice {
+				str, ok := v.(string)
+				if !ok {
+					return nil, fmt.Errorf("expected string, found %T for %v", i, v)
+				}
+				strSlice[i] = str
+			}
+			return strSlice, nil
 		}
 		return nil, fmt.Errorf("expected string slice found %T for %s", raw, name)
 	}
@@ -273,6 +281,17 @@ func (c *configFileSettings) StringSlice(name string) ([]string, error) {
 
 func (c *configFileSettings) IntSlice(name string) ([]int, error) {
 	if raw, ok := c.Settings[name]; ok {
+		if slice, ok := raw.([]interface{}); ok {
+			intSlice := make([]int, len(slice))
+			for i, v := range slice {
+				str, ok := v.(int)
+				if !ok {
+					return nil, fmt.Errorf("expected int, found %T for %v ", v, v)
+				}
+				intSlice[i] = str
+			}
+			return intSlice, nil
+		}
 		if v, ok := raw.([]int); ok {
 			return v, nil
 		}
@@ -322,7 +341,6 @@ func ReadConfigFile(c *cli.Context, log logger.Service) (*configFileSettings, er
 	if err := yaml.NewDecoder(file).Decode(&configuration); err != nil {
 		return nil, err
 	}
-
 	configuration.sourceFile = configFile
 	return &configuration, nil
 }

cmd/cloudflared/config/configuration_test.go

@@ -0,0 +1,76 @@
+package config
+
+import (
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+	"gopkg.in/yaml.v2"
+)
+
+func TestConfigFileSettings(t *testing.T) {
+	var (
+		firstIngress = UnvalidatedIngressRule{
+			Hostname: "tunnel1.example.com",
+			Path:     "/id",
+			Service:  "https://localhost:8000",
+		}
+		secondIngress = UnvalidatedIngressRule{
+			Hostname: "*",
+			Path:     "",
+			Service:  "https://localhost:8001",
+		}
+	)
+	rawYAML := `
+tunnel: config-file-test
+ingress:
+ - hostname: tunnel1.example.com
+   path: /id
+   service: https://localhost:8000
+ - hostname: "*"
+   service: https://localhost:8001
+retries: 5
+grace-period: 30s
+percentage: 3.14
+hostname: example.com
+tag:
+ - test
+ - central-1
+counters:
+ - 123
+ - 456
+`
+	var config configFileSettings
+	err := yaml.Unmarshal([]byte(rawYAML), &config)
+	assert.NoError(t, err)
+
+	assert.Equal(t, "config-file-test", config.TunnelID)
+	assert.Equal(t, firstIngress, config.Ingress[0])
+	assert.Equal(t, secondIngress, config.Ingress[1])
+
+	retries, err := config.Int("retries")
+	assert.NoError(t, err)
+	assert.Equal(t, 5, retries)
+
+	gracePeriod, err := config.Duration("grace-period")
+	assert.NoError(t, err)
+	assert.Equal(t, time.Second*30, gracePeriod)
+
+	percentage, err := config.Float64("percentage")
+	assert.NoError(t, err)
+	assert.Equal(t, 3.14, percentage)
+
+	hostname, err := config.String("hostname")
+	assert.NoError(t, err)
+	assert.Equal(t, "example.com", hostname)
+
+	tags, err := config.StringSlice("tag")
+	assert.NoError(t, err)
+	assert.Equal(t, "test", tags[0])
+	assert.Equal(t, "central-1", tags[1])
+
+	counters, err := config.IntSlice("counters")
+	assert.NoError(t, err)
+	assert.Equal(t, 123, counters[0])
+	assert.Equal(t, 456, counters[1])
+}

cmd/cloudflared/tunnel/cmd.go

@@ -537,25 +537,24 @@ func forceSetFlag(c *cli.Context, name, value string) {
 }
 
 func SetFlagsFromConfigFile(c *cli.Context) error {
+	const exitCode = 1
 	log, err := createLogger(c, false, false)
 	if err != nil {
 		return cliutil.PrintLoggerSetupError("error setting up logger", err)
 	}
-
 	inputSource, err := config.ReadConfigFile(c, log)
 	if err != nil {
 		if err == config.ErrNoConfigFile {
 			return nil
 		}
-		return err
+		return cli.Exit(err, exitCode)
 	}
 	targetFlags := c.Command.Flags
 	if c.Command.Name == "" {
 		targetFlags = c.App.Flags
 	}
 	if err := altsrc.ApplyInputSourceValues(c, inputSource, targetFlags); err != nil {
-		log.Errorf("Cannot load configuration from %s: %v", inputSource.Source(), err)
-		return err
+		return cli.Exit(err, exitCode)
 	}
 	return nil
 }