fix: allow setting the issuer from environment variables

polyculeconnect/config/config.go

@@ -22,6 +22,8 @@ const (
 	varServerPort   envVar = "SERVER_PORT"
 	varServerSocket envVar = "SERVER_SOCK_PATH"
 
+	varIssuer envVar = "ISSUER"
+
 	varStorageType      envVar = "STORAGE_TYPE"
 	varStorageFile      envVar = "STORAGE_FILEPATH"
 	varStorageHost      envVar = "STORAGE_HOST"
@@ -55,6 +57,8 @@ const (
 	defaultServerPort   = 5000
 	defaultServerSocket = ""
 
+	defaultIssuer = "locahost"
+
 	defaultStorageType      = Memory
 	defaultStorageFile      = "./polyculeconnect.db"
 	defaultStorageHost      = "127.0.0.1"
@@ -125,6 +129,9 @@ func (ac *AppConfig) UnmarshalJSON(data []byte) error {
 		return fmt.Errorf("failed to read JSON: %w", err)
 	}
 	ac.OpenConnectConfig = jsonConf.OpenConnectConfig
+	if ac.OpenConnectConfig == nil {
+		ac.OpenConnectConfig = &OpenConnectConfig{}
+	}
 	return nil
 }
 
@@ -145,6 +152,8 @@ func (ac *AppConfig) getConfFromEnv() {
 	ac.StorageConfig.Password = getStringFromEnv(varStoragePassword, defaultStoragePassword)
 	ac.StorageConfig.Ssl.CaFile = getStringFromEnv(varStorageSSLCaFile, defaultStorageSSLCaFile)
 	ac.StorageConfig.Ssl.Mode = getStringFromEnv(varStorageSSLMode, defaultStorageSSLMode)
+
+	ac.OpenConnectConfig.Issuer = getStringFromEnv(varIssuer, defaultIssuer)
 }
 
 func (ac *AppConfig) RedirectURI() string {
@@ -154,6 +163,7 @@ func (ac *AppConfig) RedirectURI() string {
 func New(filepath string) (*AppConfig, error) {
 	var conf AppConfig
 	conf.StorageConfig = &StorageConfig{}
+	conf.OpenConnectConfig = &OpenConnectConfig{}
 	content, err := os.ReadFile(filepath)
 	if err != nil {
 		if !errors.Is(err, fs.ErrNotExist) {

polyculeconnect/config/config_test.go

@@ -29,6 +29,9 @@ var defaultConfig = AppConfig{
 			CaFile string
 		}{Mode: defaultStorageSSLMode, CaFile: defaultStorageSSLCaFile},
 	},
+	OpenConnectConfig: &OpenConnectConfig{
+		Issuer: defaultIssuer,
+	},
 }
 
 func initJson(t *testing.T, content string) string {