feat(tvix/eval): implement `builtins.filterSource` r/7578

We add a new set of builtins called `import_builtins`, which
will contain import-related builtins, such as `builtins.path` and
`builtins.filterSource`. Both can import paths into the store, with
various knobs to alter the result, e.g. filtering, renaming, expected
hashes.

We introduce `filtered_ingest` which will drive the filtered ingestion
via the Nix function via the generator machinery, and then we register
the root node to the path info service inside the store.

`builtins.filterSource` is very simple, `builtins.path` is a more
complicated model requiring the same logic albeit more sophisticated
with name customization, file ingestion method and expected SHA-256.

Change-Id: I1083f37808b35f7b37818c8ffb9543d9682b2de2
Reviewed-on: https://cl.tvl.fyi/c/depot/+/10654
Autosubmit: raitobezarius <tvl@lahfa.xyz>
Tested-by: BuildkiteCI
Reviewed-by: flokli <flokli@flokli.de>

1 files changed, 3 insertions, 2 deletions

diff --git a/tvix/glue/src/tests/mod.rs b/tvix/glue/src/tests/mod.rs
index ad6571e4d212..469ed17a5135 100644
--- a/tvix/glue/src/tests/mod.rs
+++ b/tvix/glue/src/tests/mod.rs
@@ -13,7 +13,7 @@ use tvix_store::pathinfoservice::{MemoryPathInfoService, PathInfoService};
 use rstest::rstest;
 
 use crate::{
-    builtins::{add_derivation_builtins, add_fetcher_builtins},
+    builtins::{add_derivation_builtins, add_fetcher_builtins, add_import_builtins},
     tvix_store_io::TvixStoreIO,
 };
 
@@ -54,7 +54,8 @@ fn eval_test(code_path: PathBuf, expect_success: bool) {
 
     eval.strict = true;
     add_derivation_builtins(&mut eval, tvix_store_io.clone());
-    add_fetcher_builtins(&mut eval, tvix_store_io);
+    add_fetcher_builtins(&mut eval, tvix_store_io.clone());
+    add_import_builtins(&mut eval, tvix_store_io.clone());
 
     let result = eval.evaluate(code, Some(code_path.clone()));
     let failed = match result.value {