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//! rust-analyzer is lazy and doesn't not compute anything unless asked. This
//! sometimes is counter productive when, for example, the first goto definition
//! request takes longer to compute. This modules implemented prepopulating of
//! various caches, it's not really advanced at the moment.
use hir::db::DefDatabase;
use ide_db::base_db::SourceDatabase;
use crate::RootDatabase;
#[derive(Debug)]
pub enum PrimeCachesProgress {
Started,
/// We started indexing a crate.
StartedOnCrate {
on_crate: String,
n_done: usize,
n_total: usize,
},
/// We finished indexing all crates.
Finished,
}
pub(crate) fn prime_caches(db: &RootDatabase, cb: &(dyn Fn(PrimeCachesProgress) + Sync)) {
let _p = profile::span("prime_caches");
let graph = db.crate_graph();
let topo = &graph.crates_in_topological_order();
cb(PrimeCachesProgress::Started);
// Take care to emit the finish signal even when the computation is canceled.
let _d = stdx::defer(|| cb(PrimeCachesProgress::Finished));
// FIXME: This would be easy to parallelize, since it's in the ideal ordering for that.
// Unfortunately rayon prevents panics from propagation out of a `scope`, which breaks
// cancellation, so we cannot use rayon.
for (i, &crate_id) in topo.iter().enumerate() {
let crate_name = graph[crate_id].display_name.as_deref().unwrap_or_default().to_string();
cb(PrimeCachesProgress::StartedOnCrate {
on_crate: crate_name,
n_done: i,
n_total: topo.len(),
});
db.crate_def_map(crate_id);
db.import_map(crate_id);
}
}
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