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//! FIXME: write short doc here
use std::{collections::HashSet, error::Error, path::Path};
use rustc_hash::FxHashMap;
use crossbeam_channel::{unbounded, Receiver};
use ra_db::{CrateGraph, FileId, SourceRootId};
use ra_ide::{AnalysisChange, AnalysisHost, FeatureFlags};
use ra_project_model::{get_rustc_cfg_options, PackageRoot, ProjectWorkspace};
use ra_vfs::{RootEntry, Vfs, VfsChange, VfsTask, Watch};
use ra_vfs_glob::RustPackageFilterBuilder;
type Result<T> = std::result::Result<T, Box<dyn Error + Send + Sync>>;
fn vfs_file_to_id(f: ra_vfs::VfsFile) -> FileId {
FileId(f.0)
}
fn vfs_root_to_id(r: ra_vfs::VfsRoot) -> SourceRootId {
SourceRootId(r.0)
}
pub fn load_cargo(root: &Path) -> Result<(AnalysisHost, FxHashMap<SourceRootId, PackageRoot>)> {
let root = std::env::current_dir()?.join(root);
let ws = ProjectWorkspace::discover(root.as_ref(), &Default::default())?;
let project_roots = ws.to_roots();
let (sender, receiver) = unbounded();
let sender = Box::new(move |t| sender.send(t).unwrap());
let (mut vfs, roots) = Vfs::new(
project_roots
.iter()
.map(|pkg_root| {
RootEntry::new(
pkg_root.path().clone(),
RustPackageFilterBuilder::default()
.set_member(pkg_root.is_member())
.into_vfs_filter(),
)
})
.collect(),
sender,
Watch(false),
);
// FIXME: cfg options?
let default_cfg_options = {
let mut opts = get_rustc_cfg_options();
opts.insert_atom("test".into());
opts.insert_atom("debug_assertion".into());
opts
};
let (crate_graph, _crate_names) =
ws.to_crate_graph(&default_cfg_options, &mut |path: &Path| {
let vfs_file = vfs.load(path);
log::debug!("vfs file {:?} -> {:?}", path, vfs_file);
vfs_file.map(vfs_file_to_id)
});
log::debug!("crate graph: {:?}", crate_graph);
let source_roots = roots
.iter()
.map(|&vfs_root| {
let source_root_id = vfs_root_to_id(vfs_root);
let project_root = project_roots
.iter()
.find(|it| it.path() == &vfs.root2path(vfs_root))
.unwrap()
.clone();
(source_root_id, project_root)
})
.collect::<FxHashMap<_, _>>();
let host = load(&source_roots, crate_graph, &mut vfs, receiver);
Ok((host, source_roots))
}
pub fn load(
source_roots: &FxHashMap<SourceRootId, PackageRoot>,
crate_graph: CrateGraph,
vfs: &mut Vfs,
receiver: Receiver<VfsTask>,
) -> AnalysisHost {
let lru_cap = std::env::var("RA_LRU_CAP").ok().and_then(|it| it.parse::<usize>().ok());
let mut host = AnalysisHost::new(lru_cap, FeatureFlags::default());
let mut analysis_change = AnalysisChange::new();
analysis_change.set_crate_graph(crate_graph);
// wait until Vfs has loaded all roots
let mut roots_loaded = HashSet::new();
for task in receiver {
vfs.handle_task(task);
let mut done = false;
for change in vfs.commit_changes() {
match change {
VfsChange::AddRoot { root, files } => {
let source_root_id = vfs_root_to_id(root);
let is_local = source_roots[&source_root_id].is_member();
log::debug!(
"loaded source root {:?} with path {:?}",
source_root_id,
vfs.root2path(root)
);
analysis_change.add_root(source_root_id, is_local);
analysis_change.set_debug_root_path(
source_root_id,
source_roots[&source_root_id].path().display().to_string(),
);
let mut file_map = FxHashMap::default();
for (vfs_file, path, text) in files {
let file_id = vfs_file_to_id(vfs_file);
analysis_change.add_file(source_root_id, file_id, path.clone(), text);
file_map.insert(path, file_id);
}
roots_loaded.insert(source_root_id);
if roots_loaded.len() == vfs.n_roots() {
done = true;
}
}
VfsChange::AddFile { root, file, path, text } => {
let source_root_id = vfs_root_to_id(root);
let file_id = vfs_file_to_id(file);
analysis_change.add_file(source_root_id, file_id, path, text);
}
VfsChange::RemoveFile { .. } | VfsChange::ChangeFile { .. } => {
// We just need the first scan, so just ignore these
}
}
}
if done {
break;
}
}
host.apply_change(analysis_change);
host
}
#[cfg(test)]
mod tests {
use super::*;
use ra_hir::Crate;
#[test]
fn test_loading_rust_analyzer() {
let path = Path::new(env!("CARGO_MANIFEST_DIR")).parent().unwrap().parent().unwrap();
let (host, _roots) = load_cargo(path).unwrap();
let n_crates = Crate::all(host.raw_database()).len();
// RA has quite a few crates, but the exact count doesn't matter
assert!(n_crates > 20);
}
}
|
