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use ra_syntax::SmolStr;
pub use ra_db::CrateId;
use crate::{HirDatabase, Module, Cancelable};
/// hir::Crate describes a single crate. It's the main inteface with which
/// crate's dependencies interact. Mostly, it should be just a proxy for the
/// root module.
#[derive(Debug)]
pub struct Crate {
crate_id: CrateId,
}
#[derive(Debug)]
pub struct CrateDependency {
pub krate: Crate,
pub name: SmolStr,
}
impl Crate {
pub(crate) fn new(crate_id: CrateId) -> Crate {
Crate { crate_id }
}
pub fn dependencies(&self, db: &impl HirDatabase) -> Vec<CrateDependency> {
let crate_graph = db.crate_graph();
crate_graph
.dependencies(self.crate_id)
.map(|dep| {
let krate = Crate::new(dep.crate_id());
let name = dep.name.clone();
CrateDependency { krate, name }
})
.collect()
}
pub fn root_module(&self, db: &impl HirDatabase) -> Cancelable<Option<Module>> {
let crate_graph = db.crate_graph();
let file_id = crate_graph.crate_root(self.crate_id);
let source_root_id = db.file_source_root(file_id);
let module_tree = db.module_tree(source_root_id)?;
// FIXME: teach module tree about crate roots instead of guessing
let (module_id, _) = ctry!(module_tree
.modules_with_sources()
.find(|(_, src)| src.file_id() == file_id));
let module = Module::new(db, source_root_id, module_id)?;
Ok(Some(module))
}
}
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