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Add ExternSourceId and env functions

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This commit is contained in:
Edwin Cheng 2020-03-10 21:59:12 +08:00
parent c1db5d26a0
commit 8153a0b3ef
1 changed files with 27 additions and 0 deletions
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27
crates/ra_db/src/input.rs
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@ -122,9 +122,16 @@ pub enum Edition {
Edition2015,
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub struct ExternSourceId(pub u32);
#[derive(Default, Debug, Clone, PartialEq, Eq)]
pub struct Env {
entries: FxHashMap<String, String>,
// Note: Some env variables (e.g. OUT_DIR) are located outside of the
// crate. We store a map to allow remap it to ExternSourceId
extern_paths: FxHashMap<String, ExternSourceId>,
}
#[derive(Debug, Clone, PartialEq, Eq)]
@ -269,6 +276,26 @@ impl Env {
pub fn get(&self, env: &str) -> Option<String> {
self.entries.get(env).cloned()
}
pub fn extern_path(&self, path: &str) -> Option<(ExternSourceId, RelativePathBuf)> {
self.extern_paths.iter().find_map(|(root_path, id)| {
if path.starts_with(root_path) {
let mut rel_path = &path[root_path.len()..];
if rel_path.starts_with("/") {
rel_path = &rel_path[1..];
}
let rel_path = RelativePathBuf::from_path(rel_path).ok()?;
Some((id.clone(), rel_path))
} else {
None
}
})
}
pub fn set_extern_path(&mut self, env: &str, root_path: &str, root: ExternSourceId) {
self.entries.insert(env.to_owned(), root_path.to_owned());
self.extern_paths.insert(root_path.to_owned(), root);
}
}
#[derive(Debug)]