Read blob sizes only for selected validation inputs

internal/validation/file_size.go

@@ -1,21 +1,31 @@
 package validation
 
 import (
+	"context"
+	"fmt"
 	"path"
 	"strings"
+
+	"gitea.maximumdirect.net/eric/ReleaseKit/internal/git"
 )
 
 const defaultFileSizeLimit int64 = 1_000_000
 
-func checkFileSize(tree *CandidateTree, settings *FileSizeSettings) error {
+func checkFileSize(ctx context.Context, tree *CandidateTree, settings *FileSizeSettings) error {
+	entries := make([]git.TreeEntry, 0, len(tree.inputEntries))
+	for _, entry := range tree.inputEntries {
+		if entry.Type == "blob" && !excludedByPath(entry.Path, settings.Exclusions) {
+			entries = append(entries, entry)
+		}
+	}
+	if err := git.PopulateBlobSizes(ctx, tree.repositoryDir, entries); err != nil {
+		return &Failure{Check: FileSize, Cause: fmt.Errorf("inspect selected committed file sizes: %w", err)}
+	}
 	limit := defaultFileSizeLimit
 	if settings.LimitBytes != nil {
 		limit = *settings.LimitBytes
 	}
-	for _, entry := range tree.inputEntries {
-		if entry.Type != "blob" || !entry.HasSize || excludedByPath(entry.Path, settings.Exclusions) {
-			continue
-		}
+	for _, entry := range entries {
 		if entry.Size > limit {
 			return &Failure{
 				Check: FileSize,