diff options
Diffstat (limited to 'tvix/eval/src/lib.rs')
| -rw-r--r-- | tvix/eval/src/lib.rs | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/tvix/eval/src/lib.rs b/tvix/eval/src/lib.rs index c9a6ac103eba..8cf9fe6e1bba 100644 --- a/tvix/eval/src/lib.rs +++ b/tvix/eval/src/lib.rs @@ -45,6 +45,7 @@ use std::sync::Arc; pub use crate::builtins::global_builtins; pub use crate::compiler::{compile, prepare_globals}; pub use crate::errors::{Error, ErrorKind, EvalResult}; +pub use crate::io::{DummyIO, EvalIO, StdIO}; use crate::observer::{CompilerObserver, RuntimeObserver}; pub use crate::pretty_ast::pretty_print_expr; pub use crate::source::SourceCode; @@ -86,6 +87,12 @@ pub struct Evaluation<'code, 'co, 'ro> { /// Top-level file reference for this code inside the source map. file: Arc<codemap::File>, + /// Implementation of file-IO to use during evaluation, e.g. for + /// impure builtins. + /// + /// Defaults to [`DummyIO`] if not set explicitly. + pub io_handle: Box<dyn EvalIO>, + /// (optional) Nix search path, e.g. the value of `NIX_PATH` used /// for resolving items on the search path (such as `<nixpkgs>`). pub nix_path: Option<String>, @@ -137,6 +144,7 @@ impl<'code, 'co, 'ro> Evaluation<'code, 'co, 'ro> { location, source_map, file, + io_handle: Box::new(DummyIO {}), nix_path: None, compiler_observer: None, runtime_observer: None, @@ -216,7 +224,12 @@ impl<'code, 'co, 'ro> Evaluation<'code, 'co, 'ro> { .unwrap_or_else(|| Default::default()); let runtime_observer = self.runtime_observer.take().unwrap_or(&mut noop_observer); - let vm_result = run_lambda(nix_path, runtime_observer, compiler_result.lambda); + let vm_result = run_lambda( + nix_path, + self.io_handle, + runtime_observer, + compiler_result.lambda, + ); match vm_result { Ok(mut runtime_result) => { |