feat(tvix/glue): contextful derivation r/7338

We calculate the input context by performing the union of context
over all input of the derivation.

Then, we just pass the rest of it to the remaining machinery.

Finally, we re-emit an `outPath` and a `drvPath` containing the expected
contexts.

Change-Id: I74905fb258b5bee8b08d1208c9eb87f51b92a890
Reviewed-on: https://cl.tvl.fyi/c/depot/+/10436
Autosubmit: raitobezarius <tvl@lahfa.xyz>
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI

1 files changed, 2 insertions, 17 deletions

diff --git a/tvix/glue/src/tvix_io.rs b/tvix/glue/src/tvix_io.rs
index 52bbd7bc9c..77dcb92910 100644
--- a/tvix/glue/src/tvix_io.rs
+++ b/tvix/glue/src/tvix_io.rs
@@ -8,30 +8,19 @@
 //! otherwise fundamental features like nixpkgs bootstrapping and hash
 //! calculation will not work.
 
-use std::cell::RefCell;
 use std::io;
 use std::path::{Path, PathBuf};
-use std::rc::Rc;
 use tvix_eval::{EvalIO, FileType};
 
-use crate::known_paths::KnownPaths;
-
 // TODO: Merge this together with TvixStoreIO?
 pub struct TvixIO<T: EvalIO> {
-    /// Ingested paths must be reported to this known paths tracker
-    /// for accurate build reference scanning.
-    known_paths: Rc<RefCell<KnownPaths>>,
-
     // Actual underlying [EvalIO] implementation.
     actual: T,
 }
 
 impl<T: EvalIO> TvixIO<T> {
-    pub fn new(known_paths: Rc<RefCell<KnownPaths>>, actual: T) -> Self {
-        Self {
-            known_paths,
-            actual,
-        }
+    pub fn new(actual: T) -> Self {
+        Self { actual }
     }
 }
 
@@ -42,10 +31,6 @@ impl<T: EvalIO> EvalIO for TvixIO<T> {
 
     fn import_path(&self, path: &Path) -> io::Result<PathBuf> {
         let imported_path = self.actual.import_path(path)?;
-        self.known_paths
-            .borrow_mut()
-            .plain(imported_path.to_string_lossy());
-
         Ok(imported_path)
     }