feat(tvix/eval): add file_type method r/8304

This allows peeking of the type at a given path.

It's necessary, as an open() might not fail until you try to read()
from it, and generally, stat'ing can be faster in some cases.

Change-Id: Ib002da3194a3546ca286de49aac8d1022ec5560f
Reviewed-on: https://cl.tvl.fyi/c/depot/+/11871
Tested-by: BuildkiteCI
Reviewed-by: Ilan Joselevich <personal@ilanjoselevich.com>
Reviewed-by: Connor Brewster <cbrewster@hey.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/tvix/glue/src/tvix_io.rs b/tvix/glue/src/tvix_io.rs
index 0e5f23b99093..db0c2cef77aa 100644
--- a/tvix/glue/src/tvix_io.rs
+++ b/tvix/glue/src/tvix_io.rs
@@ -60,6 +60,10 @@ where
         self.actual.as_ref().open(path)
     }
 
+    fn file_type(&self, path: &Path) -> io::Result<FileType> {
+        self.actual.as_ref().file_type(path)
+    }
+
     fn read_dir(&self, path: &Path) -> io::Result<Vec<(bytes::Bytes, FileType)>> {
         self.actual.as_ref().read_dir(path)
     }