vendor: update buildkit to master@ae9d0f5

Signed-off-by: Justin Chadwell <me@jedevc.com>

vendor/github.com/moby/buildkit/session/filesync/filesync.go

@@ -27,27 +27,35 @@ const (
 )
 
 type fsSyncProvider struct {
-	dirs   map[string]SyncedDir
+	dirs   DirSource
 	p      progressCb
 	doneCh chan error
 }
 
 type SyncedDir struct {
-	Name     string
 	Dir      string
 	Excludes []string
 	Map      func(string, *fstypes.Stat) fsutil.MapResult
 }
 
+type DirSource interface {
+	LookupDir(string) (SyncedDir, bool)
+}
+
+type StaticDirSource map[string]SyncedDir
+
+var _ DirSource = StaticDirSource{}
+
+func (dirs StaticDirSource) LookupDir(name string) (SyncedDir, bool) {
+	dir, found := dirs[name]
+	return dir, found
+}
+
 // NewFSSyncProvider creates a new provider for sending files from client
-func NewFSSyncProvider(dirs []SyncedDir) session.Attachable {
-	p := &fsSyncProvider{
-		dirs: map[string]SyncedDir{},
+func NewFSSyncProvider(dirs DirSource) session.Attachable {
+	return &fsSyncProvider{
+		dirs: dirs,
 	}
-	for _, d := range dirs {
-		p.dirs[d.Name] = d
-	}
-	return p
 }
 
 func (sp *fsSyncProvider) Register(server *grpc.Server) {
@@ -81,7 +89,7 @@ func (sp *fsSyncProvider) handle(method string, stream grpc.ServerStream) (retEr
 		dirName = name[0]
 	}
 
-	dir, ok := sp.dirs[dirName]
+	dir, ok := sp.dirs.LookupDir(dirName)
 	if !ok {
 		return InvalidSessionError{status.Errorf(codes.NotFound, "no access allowed to dir %q", dirName)}
 	}