X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/b8fb328cc2f084d155add478264ffaf384eda190..b041a675c577e174680913e0da0bf69b1cca83b6:/sdk/go/arvados/fs_base.go

diff --git a/sdk/go/arvados/fs_base.go b/sdk/go/arvados/fs_base.go
index bebb74261e..2ad4d1f859 100644
--- a/sdk/go/arvados/fs_base.go
+++ b/sdk/go/arvados/fs_base.go
@@ -234,6 +234,14 @@ type fileinfo struct {
 	mode    os.FileMode
 	size    int64
 	modTime time.Time
+	// If not nil, sys() returns the source data structure, which
+	// can be a *Collection, *Group, or nil. Currently populated
+	// only for project dirs and top-level collection dirs. Does
+	// not stay up to date with upstream changes.
+	//
+	// Intended to support keep-web's properties-as-s3-metadata
+	// feature (https://dev.arvados.org/issues/19088).
+	sys func() interface{}
 }
 
 // Name implements os.FileInfo.
@@ -261,9 +269,12 @@ func (fi fileinfo) Size() int64 {
 	return fi.size
 }
 
-// Sys implements os.FileInfo.
+// Sys implements os.FileInfo. See comment in fileinfo struct.
 func (fi fileinfo) Sys() interface{} {
-	return nil
+	if fi.sys == nil {
+		return nil
+	}
+	return fi.sys()
 }
 
 type nullnode struct{}
@@ -415,7 +426,7 @@ func (n *treenode) MemorySize() (size int64) {
 	for _, inode := range n.inodes {
 		size += inode.MemorySize()
 	}
-	return
+	return 64 + size
 }
 
 type fileSystem struct {