Adds jsonFilename config and its warning and error.

Signed-off-by: JU4N98 <[email protected]>

pkg/sidecar/config.go

@@ -32,8 +32,9 @@ type Config struct {
 	RenewSignalDeprecated              string `hcl:"renewSignal"`
 
 	// JWT configuration
-	JwtAudience  string `hcl:"audience"`
-	JSONFilename string `hcl:"json_filename"`
+	JwtAudience            string `hcl:"audience"`
+	JSONFilename           string `hcl:"json_filename"`
+	JSONFilenameDeprecated string `hcl:"jsonFilename"`
 
 	// TODO: is there a reason for this to be exposed? and inside of config?
 	ReloadExternalProcess func() error
@@ -119,6 +120,14 @@ func ValidateConfig(c *Config) error {
 		c.RenewSignal = c.RenewSignalDeprecated
 	}
 
+	if c.JSONFilenameDeprecated != "" {
+		if c.JSONFilename != "" {
+			return errors.New("use of json_filename and jsonFilename found, use only json_filename")
+		}
+		c.Log.Warn(getWarning("jsonFilename", "json_filename"))
+		c.JSONFilename = c.JSONFilenameDeprecated
+	}
+
 	switch {
 	case c.SvidFileName == "":
 		return errors.New("svid_file_name is required")

pkg/sidecar/config_test.go

@@ -159,7 +159,19 @@ func TestValidateConfig(t *testing.T) {
 			},
 			expectError: "use of renew_signal and renewSignal found, use only renew_signal",
 		},
-
+		{
+			name: "Using JSONFilenameDeprecated",
+			config: &Config{
+				AgentAddress:           "path",
+				SvidFileName:           "cert.pem",
+				SvidKeyFileName:        "key.pem",
+				SvidBundleFileName:     "bundle.pem",
+				RenewSignal:            "SIGHUP",
+				JSONFilename:           "cert.json",
+				JSONFilenameDeprecated: "cert.json",
+			},
+			expectError: "use of jsonFilename and json_filename found, use only json_filename",
+		},
 		// Deprecated field warning:
 		{
 			name: "Using AgentAddressDeprecated",
@@ -267,6 +279,21 @@ func TestValidateConfig(t *testing.T) {
 				Message: "renewSignal will be deprecated, should be used as renew_signal",
 			}},
 		},
+		{
+			name: "Using JSONFilenameDeprecated",
+			config: &Config{
+				AgentAddress:           "path",
+				SvidFileName:           "cert.pem",
+				SvidKeyFileName:        "key.pem",
+				SvidBundleFileName:     "bundle.pem",
+				RenewSignal:            "SIGHUP",
+				JSONFilenameDeprecated: "cert.json",
+			},
+			expectLogs: []shortEntry{{
+				Level:   logrus.WarnLevel,
+				Message: "jsonFilename will be deprecated, should be used as json_filename",
+			}},
+		},
 	} {
 		t.Run(tt.name, func(t *testing.T) {
 			log, hook := test.NewNullLogger()