Merge branch '19088-s3-properties-tags'

[arvados.git] / sdk / go / arvados / fs_base.go

diff --git a/sdk/go/arvados/fs_base.go b/sdk/go/arvados/fs_base.go
index ce9253ab3d4f5d5447273cfe02edca716afc52fd..2ad4d1f859f1141035c04cb4180c5ef623d1fa04 100644 (file)
--- 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{}