parse []string from env

config.go

@@ -17,7 +17,7 @@ type Config struct {
 	Debug             bool
 	InitializeSlack   bool
 	SlackToken        string
-	SlackChannels     string
+	SlackChannels     []string
 	PostgresConn      string
 	BasicAuthUser     string
 	BasicAuthPassword string
@@ -73,6 +73,10 @@ func newConfigFromEnv(ctx context.Context, getEnv func(string) string) (Config,
 				return Config{}, err
 			}
 			m[k] = got
+		case nil, []interface{}:
+			m[k] = strings.Split(s, ",")
+		default:
+			return Config{}, fmt.Errorf("not impl: parse %s as %T", envK, v)
 		}
 	}
 

config_test.go

@@ -13,6 +13,8 @@ func TestNewConfig(t *testing.T) {
 			return "1"
 		case "INITIALIZE_SLACK":
 			return "true"
+		case "SLACK_CHANNELS":
+			return "x,y"
 		default:
 			return ""
 		}
@@ -22,5 +24,7 @@ func TestNewConfig(t *testing.T) {
 		t.Error(got)
 	} else if !got.InitializeSlack {
 		t.Error(got)
+	} else if len(got.SlackChannels) != 2 || got.SlackChannels[0] != "x" || got.SlackChannels[1] != "y" {
+		t.Error(got)
 	}
 }