test(search): add meilisearch live gate

cmd/reindex_search/main.go

@@ -37,6 +37,10 @@ func main() {
 		fmt.Fprintf(os.Stderr, "config load: %v\n", err)
 		os.Exit(1)
 	}
+	if err := validateSearchEngineForReindex(cfg.Search); err != nil {
+		fmt.Fprintf(os.Stderr, "search config: %v\n", err)
+		os.Exit(1)
+	}
 	_ = applogger.Init(applogger.Config{Level: cfg.Log.Level, Format: cfg.Log.Format, Output: "stdout", ErrorOutput: "stderr"})
 
 	db, err := app.NewDatabase(&cfg.Database, cfg.Log.Level)
@@ -95,6 +99,13 @@ func main() {
 	}
 }
 
+func validateSearchEngineForReindex(cfg config.SearchConfig) error {
+	if strings.ToLower(strings.TrimSpace(cfg.Engine)) != search.EngineMeilisearch {
+		return fmt.Errorf("reindex_search requires search.engine=meilisearch; db fallback does not index documents")
+	}
+	return nil
+}
+
 func parseTypes(raw string) map[search.SearchResultType]bool {
 	selected := map[search.SearchResultType]bool{}
 	for _, part := range strings.Split(raw, ",") {

cmd/reindex_search/main_test.go

@@ -0,0 +1,19 @@
+package main
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	"github.com/gochat/gochat/internal/config"
+	"github.com/gochat/gochat/internal/search"
+)
+
+func TestValidateSearchEngineForReindexRequiresMeilisearch(t *testing.T) {
+	require.NoError(t, validateSearchEngineForReindex(config.SearchConfig{Engine: search.EngineMeilisearch}))
+
+	err := validateSearchEngineForReindex(config.SearchConfig{Engine: search.EngineDB})
+	require.Error(t, err)
+	assert.Contains(t, err.Error(), "requires search.engine=meilisearch")
+}