fix: contain generated files and assets and harden SQL rendering

pkg/assetloader/executor.go

@@ -3,20 +3,12 @@ package assetloader
 import (
 	"context"
 	"fmt"
-	"os"
+	"git.warky.dev/wdevs/relspecgo/pkg/sqllex"
 	"path/filepath"
-	"regexp"
-	"strings"
 
 	"github.com/jackc/pgx/v5"
 )
 
-// namedPlaceholder matches :identifier patterns (but not ::cast syntax).
-var namedPlaceholder = regexp.MustCompile(`:([a-zA-Z_][a-zA-Z0-9_]*)`)
-
-// pgCastMarker temporarily replaces :: to protect PostgreSQL cast syntax.
-const pgCastMarker = "\x00PGCAST\x00"
-
 // BuildQuery converts a SQL call that uses :name named placeholders into a
 // pgx-compatible positional-parameter query ($1, $2, …) and returns the
 // corresponding argument slice.
@@ -30,13 +22,11 @@ const pgCastMarker = "\x00PGCAST\x00"
 // placeholder (not built-in and not in staticParams) returns an error.
 // PostgreSQL cast syntax (::type) is left untouched.
 func BuildQuery(call string, fileBytes []byte, filename string, staticParams map[string]string) (query string, args []any, err error) {
-	// Protect :: casts before running the placeholder regex.
-	protected := strings.ReplaceAll(call, "::", pgCastMarker)
 
 	paramIndex := map[string]int{} // name → 1-based position
 	var firstErr error
 
-	query = namedPlaceholder.ReplaceAllStringFunc(protected, func(match string) string {
+	query = sqllex.Walk(call, func(match string) string {
 		if firstErr != nil {
 			return match
 		}
@@ -70,15 +60,12 @@ func BuildQuery(call string, fileBytes []byte, filename string, staticParams map
 		paramIndex[name] = idx
 		args = append(args, val)
 		return fmt.Sprintf("$%d", idx)
-	})
+	}, nil)
 
 	if firstErr != nil {
 		return "", nil, firstErr
 	}
 
-	// Restore :: casts.
-	query = strings.ReplaceAll(query, pgCastMarker, "::")
-
 	return query, args, nil
 }
 
@@ -86,7 +73,7 @@ func BuildQuery(call string, fileBytes []byte, filename string, staticParams map
 // absolute path set by ScanDir) and executes the configured SQL call via conn.
 // The file's raw bytes are bound as a []byte parameter — no encoding or escaping.
 func ExecuteItem(ctx context.Context, conn *pgx.Conn, item Item) error {
-	data, err := os.ReadFile(item.Entry.File)
+	data, err := readItemAsset(item)
 	if err != nil {
 		return fmt.Errorf("reading asset file %s: %w", item.Entry.File, err)
 	}