diff options
Diffstat (limited to 'tvix/cli/src/tvix_io.rs')
-rw-r--r-- | tvix/cli/src/tvix_io.rs | 79 |
1 files changed, 0 insertions, 79 deletions
diff --git a/tvix/cli/src/tvix_io.rs b/tvix/cli/src/tvix_io.rs deleted file mode 100644 index 74f91138bff8..000000000000 --- a/tvix/cli/src/tvix_io.rs +++ /dev/null @@ -1,79 +0,0 @@ -//! This module implements a wrapper around tvix-eval's [EvalIO] type, -//! adding functionality which is required by tvix-cli: -//! -//! 1. Marking plain paths known to the reference scanner. -//! 2. Handling the C++ Nix `__corepkgs__`-hack for nixpkgs bootstrapping. -//! -//! All uses of [EvalIO] in tvix-cli must make use of this wrapper, -//! otherwise fundamental features like nixpkgs bootstrapping and hash -//! calculation will not work. - -use crate::KnownPaths; -use std::cell::RefCell; -use std::io; -use std::path::{Path, PathBuf}; -use std::rc::Rc; -use tvix_eval::{EvalIO, FileType}; - -// TODO: Merge this together with TvixStoreIO? -pub(crate) 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(crate) fn new(known_paths: Rc<RefCell<KnownPaths>>, actual: T) -> Self { - Self { - known_paths, - actual, - } - } -} - -impl<T: EvalIO> EvalIO for TvixIO<T> { - fn store_dir(&self) -> Option<String> { - self.actual.store_dir() - } - - fn import_path(&self, path: &Path) -> Result<PathBuf, io::Error> { - let imported_path = self.actual.import_path(path)?; - self.known_paths - .borrow_mut() - .plain(imported_path.to_string_lossy()); - - Ok(imported_path) - } - - fn path_exists(&self, path: &Path) -> Result<bool, io::Error> { - if path.starts_with("/__corepkgs__") { - return Ok(true); - } - - self.actual.path_exists(path) - } - - fn read_to_string(&self, path: &Path) -> Result<String, io::Error> { - // Bundled version of corepkgs/fetchurl.nix. The counterpart - // of this happens in `main`, where the `nix_path` of the - // evaluation has `nix=/__corepkgs__` added to it. - // - // This workaround is similar to what cppnix does for passing - // the path through. - // - // TODO: this comparison is bad and allocates, we should use - // the sane path library. - if path.starts_with("/__corepkgs__/fetchurl.nix") { - return Ok(include_str!("fetchurl.nix").to_string()); - } - - self.actual.read_to_string(path) - } - - fn read_dir(&self, path: &Path) -> Result<Vec<(bytes::Bytes, FileType)>, io::Error> { - self.actual.read_dir(path) - } -} |