feat: load backend config from yaml

backend/internal/config/config_test.go

@@ -0,0 +1,57 @@
+package config
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestLoadFromDirDefaultsToDevYAML(t *testing.T) {
+	configDir := t.TempDir()
+	writeConfig(t, configDir, "agent.dev.yaml", "development", "18080", "postgres://dev", "./dev-files", "dev-auth", "dev-system", "dev-ai")
+	t.Setenv("SENLIN_APP_MODE", "")
+	t.Setenv("PORT", "9999")
+
+	cfg, err := LoadFromDir(configDir)
+
+	require.NoError(t, err)
+	require.Equal(t, "development", cfg.Env)
+	require.Equal(t, "18080", cfg.Port)
+	require.Equal(t, "postgres://dev", cfg.DatabaseURL)
+	require.Equal(t, "./dev-files", cfg.StorageDir)
+	require.Equal(t, "dev-auth", cfg.AuthSecret)
+	require.Equal(t, "dev-system", cfg.SystemAIKey)
+	require.Equal(t, "dev-ai", cfg.AIKeyEncryptionSecret)
+}
+
+func TestLoadFromDirUsesSENLINAppMode(t *testing.T) {
+	configDir := t.TempDir()
+	writeConfig(t, configDir, "agent.dev.yaml", "development", "18080", "postgres://dev", "./dev-files", "dev-auth", "", "dev-ai")
+	writeConfig(t, configDir, "agent.prod.yaml", "production", "80", "postgres://prod", "/data/files", "prod-auth", "prod-system", "prod-ai")
+	t.Setenv("SENLIN_APP_MODE", "prod")
+
+	cfg, err := LoadFromDir(configDir)
+
+	require.NoError(t, err)
+	require.Equal(t, "production", cfg.Env)
+	require.Equal(t, "80", cfg.Port)
+	require.Equal(t, "postgres://prod", cfg.DatabaseURL)
+	require.Equal(t, "/data/files", cfg.StorageDir)
+	require.Equal(t, "prod-auth", cfg.AuthSecret)
+	require.Equal(t, "prod-system", cfg.SystemAIKey)
+	require.Equal(t, "prod-ai", cfg.AIKeyEncryptionSecret)
+}
+
+func writeConfig(t *testing.T, dir string, name string, env string, port string, databaseURL string, storageDir string, authSecret string, systemAIKey string, aiKeySecret string) {
+	t.Helper()
+	content := []byte("env: " + env + "\n" +
+		"port: \"" + port + "\"\n" +
+		"database_url: \"" + databaseURL + "\"\n" +
+		"storage_dir: \"" + storageDir + "\"\n" +
+		"auth_secret: \"" + authSecret + "\"\n" +
+		"system_ai_key: \"" + systemAIKey + "\"\n" +
+		"ai_key_encryption_secret: \"" + aiKeySecret + "\"\n")
+	require.NoError(t, os.WriteFile(filepath.Join(dir, name), content, 0o600))
+}