use crate::blobservice::BlobService; use crate::directoryservice::DirectoryService; use crate::{directoryservice::DirectoryPutter, proto}; use std::os::unix::ffi::OsStrExt; use std::sync::Arc; use std::{ collections::HashMap, fmt::Debug, fs, fs::File, io, os::unix::prelude::PermissionsExt, path::{Path, PathBuf}, }; use tracing::instrument; use walkdir::WalkDir; #[derive(Debug, thiserror::Error)] pub enum Error { #[error("failed to upload directory at {0}: {1}")] UploadDirectoryError(PathBuf, crate::Error), #[error("invalid encoding encountered for entry {0:?}")] InvalidEncoding(PathBuf), #[error("unable to stat {0}: {1}")] UnableToStat(PathBuf, std::io::Error), #[error("unable to open {0}: {1}")] UnableToOpen(PathBuf, std::io::Error), #[error("unable to read {0}: {1}")] UnableToRead(PathBuf, std::io::Error), } impl From for Error { fn from(value: super::Error) -> Self { match value { crate::Error::InvalidRequest(_) => panic!("tvix bug"), crate::Error::StorageError(_) => panic!("error"), } } } // This processes a given [walkdir::DirEntry] and returns a // proto::node::Node, depending on the type of the entry. // // If the entry is a file, its contents are uploaded. // If the entry is a directory, the Directory is uploaded as well. // For this to work, it relies on the caller to provide the directory object // with the previously returned (child) nodes. // // It assumes entries to be returned in "contents first" order, means this // will only be called with a directory if all children of it have been // visited. If the entry is indeed a directory, it'll also upload that // directory to the store. For this, the so-far-assembled Directory object for // this path needs to be passed in. // // It assumes the caller adds returned nodes to the directories it assembles. #[instrument(skip_all, fields(entry.file_type=?&entry.file_type(),entry.path=?entry.path()))] fn process_entry( blob_service: Arc, directory_putter: &mut Box, entry: &walkdir::DirEntry, maybe_directory: Option, ) -> Result { let file_type = entry.file_type(); if file_type.is_dir() { let directory = maybe_directory .expect("tvix bug: must be called with some directory in the case of directory"); let directory_digest = directory.digest(); let directory_size = directory.size(); // upload this directory directory_putter .put(directory) .map_err(|e| Error::UploadDirectoryError(entry.path().to_path_buf(), e))?; return Ok(proto::node::Node::Directory(proto::DirectoryNode { name: entry.file_name().as_bytes().to_owned().into(), digest: directory_digest.into(), size: directory_size, })); } if file_type.is_symlink() { let target: bytes::Bytes = std::fs::read_link(entry.path()) .map_err(|e| Error::UnableToStat(entry.path().to_path_buf(), e))? .as_os_str() .as_bytes() .to_owned() .into(); return Ok(proto::node::Node::Symlink(proto::SymlinkNode { name: entry.file_name().as_bytes().to_owned().into(), target, })); } if file_type.is_file() { let metadata = entry .metadata() .map_err(|e| Error::UnableToStat(entry.path().to_path_buf(), e.into()))?; let mut file = File::open(entry.path()) .map_err(|e| Error::UnableToOpen(entry.path().to_path_buf(), e))?; let mut writer = blob_service.open_write(); if let Err(e) = io::copy(&mut file, &mut writer) { return Err(Error::UnableToRead(entry.path().to_path_buf(), e)); }; let digest = writer.close()?; return Ok(proto::node::Node::File(proto::FileNode { name: entry.file_name().as_bytes().to_vec().into(), digest: digest.into(), size: metadata.len() as u32, // If it's executable by the user, it'll become executable. // This matches nix's dump() function behaviour. executable: metadata.permissions().mode() & 64 != 0, })); } todo!("handle other types") } /// Ingests the contents at the given path into the tvix store, /// interacting with a [BlobService] and [DirectoryService]. /// It returns the root node or an error. /// /// It's not interacting with a /// [PathInfoService](crate::pathinfoservice::PathInfoService), it's up to the /// caller to possibly register it somewhere (and potentially rename it based on /// some naming scheme. #[instrument(skip(blob_service, directory_service), fields(path=?p))] pub fn ingest_path + Debug>( blob_service: Arc, directory_service: Arc, p: P, ) -> Result { // Probe if the path points to a symlink. If it does, we process it manually, // due to https://github.com/BurntSushi/walkdir/issues/175. let symlink_metadata = fs::symlink_metadata(p.as_ref()) .map_err(|e| Error::UnableToStat(p.as_ref().to_path_buf(), e))?; if symlink_metadata.is_symlink() { let target = std::fs::read_link(p.as_ref()) .map_err(|e| Error::UnableToStat(p.as_ref().to_path_buf(), e))?; return Ok(proto::node::Node::Symlink(proto::SymlinkNode { name: p .as_ref() .file_name() .unwrap_or_default() .as_bytes() .to_owned() .into(), target: target.as_os_str().as_bytes().to_vec().into(), })); } let mut directories: HashMap = HashMap::default(); // TODO: pass this one instead? let mut directory_putter = directory_service.put_multiple_start(); for entry in WalkDir::new(p) .follow_links(false) .contents_first(true) .sort_by_file_name() { let entry = entry.unwrap(); // process_entry wants an Option in case the entry points to a directory. // make sure to provide it. let maybe_directory: Option = { if entry.file_type().is_dir() { Some( directories .entry(entry.path().to_path_buf()) .or_default() .clone(), ) } else { None } }; let node = process_entry( blob_service.clone(), &mut directory_putter, &entry, maybe_directory, )?; if entry.depth() == 0 { return Ok(node); } else { // calculate the parent path, and make sure we register the node there. // NOTE: entry.depth() > 0 let parent_path = entry.path().parent().unwrap().to_path_buf(); // record node in parent directory, creating a new [proto:Directory] if not there yet. let parent_directory = directories.entry(parent_path).or_default(); match node { proto::node::Node::Directory(e) => parent_directory.directories.push(e), proto::node::Node::File(e) => parent_directory.files.push(e), proto::node::Node::Symlink(e) => parent_directory.symlinks.push(e), } } } // unreachable, we already bailed out before if root doesn't exist. panic!("tvix bug") }