use std::path::Path; use tracing::{debug, instrument}; use tvix_castore::{ blobservice::BlobService, directoryservice::DirectoryService, import::fs::ingest_path, proto::node::Node, B3Digest, }; use nix_compat::{ nixhash::{CAHash, NixHash}, store_path::{self, StorePath}, }; use crate::{ nar::NarCalculationService, pathinfoservice::PathInfoService, proto::{nar_info, NarInfo, PathInfo}, }; impl From for nar_info::Ca { fn from(value: CAHash) -> Self { let hash_type: nar_info::ca::Hash = (&value).into(); let digest: bytes::Bytes = value.hash().to_string().into(); nar_info::Ca { r#type: hash_type.into(), digest, } } } pub fn log_node(node: &Node, path: &Path) { match node { Node::Directory(directory_node) => { debug!( path = ?path, name = ?directory_node.name, digest = %B3Digest::try_from(directory_node.digest.clone()).unwrap(), "import successful", ) } Node::File(file_node) => { debug!( path = ?path, name = ?file_node.name, digest = %B3Digest::try_from(file_node.digest.clone()).unwrap(), "import successful" ) } Node::Symlink(symlink_node) => { debug!( path = ?path, name = ?symlink_node.name, target = ?symlink_node.target, "import successful" ) } } } /// Transform a path into its base name and returns an [`std::io::Error`] if it is `..` or if the /// basename is not valid unicode. #[inline] pub fn path_to_name(path: &Path) -> std::io::Result<&str> { path.file_name() .and_then(|file_name| file_name.to_str()) .ok_or_else(|| { std::io::Error::new( std::io::ErrorKind::InvalidInput, "path must not be .. and the basename valid unicode", ) }) } /// Takes the NAR size, SHA-256 of the NAR representation, the root node and optionally /// a CA hash information. /// /// Returns the path information object for a NAR-style object. /// /// This [`PathInfo`] can be further filled for signatures, deriver or verified for the expected /// hashes. #[inline] pub fn derive_nar_ca_path_info( nar_size: u64, nar_sha256: [u8; 32], ca: Option, root_node: Node, ) -> PathInfo { // assemble the [crate::proto::PathInfo] object. PathInfo { node: Some(tvix_castore::proto::Node { node: Some(root_node), }), // There's no reference scanning on path contents ingested like this. references: vec![], narinfo: Some(NarInfo { nar_size, nar_sha256: nar_sha256.to_vec().into(), signatures: vec![], reference_names: vec![], deriver: None, ca: ca.map(|ca_hash| ca_hash.into()), }), } } /// Ingest the given path `path` and register the resulting output path in the /// [`PathInfoService`] as a recursive fixed output NAR. #[instrument(skip_all, fields(store_name=name, path=?path), err)] pub async fn import_path_as_nar_ca( path: P, name: &str, blob_service: BS, directory_service: DS, path_info_service: PS, nar_calculation_service: NS, ) -> Result where P: AsRef + std::fmt::Debug, BS: BlobService + Clone, DS: DirectoryService, PS: AsRef, NS: NarCalculationService, { let root_node = ingest_path(blob_service, directory_service, path.as_ref()) .await .map_err(|e| std::io::Error::new(std::io::ErrorKind::Other, e))?; // Ask for the NAR size and sha256 let (nar_size, nar_sha256) = nar_calculation_service.calculate_nar(&root_node).await?; // Calculate the output path. This might still fail, as some names are illegal. // FUTUREWORK: express the `name` at the type level to be valid and move the conversion // at the caller level. let output_path = store_path::build_nar_based_store_path(&nar_sha256, name).map_err(|_| { std::io::Error::new( std::io::ErrorKind::InvalidData, format!("invalid name: {}", name), ) })?; // assemble a new root_node with a name that is derived from the nar hash. let root_node = root_node.rename(output_path.to_string().into_bytes().into()); log_node(&root_node, path.as_ref()); let path_info = derive_nar_ca_path_info( nar_size, nar_sha256, Some(CAHash::Nar(NixHash::Sha256(nar_sha256))), root_node, ); // This new [`PathInfo`] that we get back from there might contain additional signatures or // information set by the service itself. In this function, we silently swallow it because // callers doesn't really need it. let _path_info = path_info_service.as_ref().put(path_info).await?; Ok(output_path.to_owned()) } #[cfg(test)] mod tests { use std::{ffi::OsStr, path::PathBuf}; use crate::import::path_to_name; use rstest::rstest; #[rstest] #[case::simple_path("a/b/c", "c")] #[case::simple_path_containing_dotdot("a/b/../c", "c")] #[case::path_containing_multiple_dotdot("a/b/../c/d/../e", "e")] fn test_path_to_name(#[case] path: &str, #[case] expected_name: &str) { let path: PathBuf = path.into(); assert_eq!(path_to_name(&path).expect("must succeed"), expected_name); } #[rstest] #[case::path_ending_in_dotdot(b"a/b/..")] #[case::non_unicode_path(b"\xf8\xa1\xa1\xa1\xa1")] fn test_invalid_path_to_name(#[case] invalid_path: &[u8]) { let path: PathBuf = unsafe { OsStr::from_encoded_bytes_unchecked(invalid_path) }.into(); path_to_name(&path).expect_err("must fail"); } }