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|
//! Implements builtins used to import paths in the store.
use futures::pin_mut;
use std::path::Path;
use tvix_eval::{
builtin_macros::builtins,
generators::{self, GenCo},
ErrorKind, Value,
};
use std::rc::Rc;
async fn filtered_ingest(
state: Rc<TvixStoreIO>,
co: GenCo,
path: &Path,
filter: Option<&Value>,
) -> Result<tvix_castore::proto::node::Node, ErrorKind> {
let mut entries_per_depths: Vec<Vec<walkdir::DirEntry>> = vec![Vec::new()];
let mut it = walkdir::WalkDir::new(path)
.follow_links(false)
.follow_root_links(false)
.contents_first(false)
.sort_by_file_name()
.into_iter();
// Skip root node.
entries_per_depths[0].push(
it.next()
.ok_or_else(|| ErrorKind::IO {
path: Some(path.to_path_buf()),
error: std::io::Error::new(std::io::ErrorKind::NotFound, "No root node emitted")
.into(),
})?
.map_err(|err| ErrorKind::IO {
path: Some(path.to_path_buf()),
error: std::io::Error::from(err).into(),
})?,
);
while let Some(entry) = it.next() {
// Entry could be a NotFound, if the root path specified does not exist.
let entry = entry.map_err(|err| ErrorKind::IO {
path: err.path().map(|p| p.to_path_buf()),
error: std::io::Error::from(err).into(),
})?;
// As per Nix documentation `:doc builtins.filterSource`.
let file_type = if entry.file_type().is_dir() {
"directory"
} else if entry.file_type().is_file() {
"regular"
} else if entry.file_type().is_symlink() {
"symlink"
} else {
"unknown"
};
let should_keep: bool = if let Some(filter) = filter {
generators::request_force(
&co,
generators::request_call_with(
&co,
filter.clone(),
[
Value::String(entry.path().as_os_str().as_encoded_bytes().into()),
Value::String(file_type.into()),
],
)
.await,
)
.await
.as_bool()?
} else {
true
};
if !should_keep {
if file_type == "directory" {
it.skip_current_dir();
}
continue;
}
if entry.depth() >= entries_per_depths.len() {
debug_assert!(
entry.depth() == entries_per_depths.len(),
"Received unexpected entry with depth {} during descent, previously at {}",
entry.depth(),
entries_per_depths.len()
);
entries_per_depths.push(vec![entry]);
} else {
entries_per_depths[entry.depth()].push(entry);
}
// FUTUREWORK: determine when it's the right moment to flush a level to the ingester.
}
let entries_stream = tvix_castore::import::leveled_entries_to_stream(entries_per_depths);
pin_mut!(entries_stream);
state.tokio_handle.block_on(async {
state
.ingest_entries(entries_stream)
.await
.map_err(|err| ErrorKind::IO {
path: Some(path.to_path_buf()),
error: err.into(),
})
})
}
#[builtins(state = "Rc<TvixStoreIO>")]
mod import_builtins {
use std::rc::Rc;
use super::*;
use nix_compat::nixhash::{CAHash, NixHash};
use tvix_eval::generators::Gen;
use tvix_eval::{generators::GenCo, ErrorKind, Value};
use crate::tvix_store_io::TvixStoreIO;
#[builtin("filterSource")]
async fn builtin_filter_source(
state: Rc<TvixStoreIO>,
co: GenCo,
#[lazy] filter: Value,
path: Value,
) -> Result<Value, ErrorKind> {
let p = path.to_path()?;
let root_node = filtered_ingest(Rc::clone(&state), co, &p, Some(&filter)).await?;
let name = tvix_store::import::path_to_name(&p)?;
Ok(state
.tokio_handle
.block_on(async {
let (_, nar_sha256) = state
.path_info_service
.as_ref()
.calculate_nar(&root_node)
.await?;
state
.register_node_in_path_info_service(
name,
&p,
CAHash::Nar(NixHash::Sha256(nar_sha256)),
root_node,
)
.await
})
.map_err(|err| ErrorKind::IO {
path: Some(p.to_path_buf()),
error: err.into(),
})?
.to_absolute_path()
.into())
}
}
pub use import_builtins::builtins as import_builtins;
use crate::tvix_store_io::TvixStoreIO;
|
