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//! FIXME: write short doc here
use std::path::PathBuf;
use rustc_hash::{FxHashMap, FxHashSet};
use serde::Deserialize;
/// Roots and crates that compose this Rust project.
#[derive(Clone, Debug, Deserialize)]
pub struct JsonProject {
pub(crate) roots: Vec<Root>,
pub(crate) crates: Vec<Crate>,
}
/// A root points to the directory which contains Rust crates. rust-analyzer watches all files in
/// all roots. Roots might be nested.
#[derive(Clone, Debug, Deserialize)]
#[serde(transparent)]
pub struct Root {
pub(crate) path: PathBuf,
}
/// A crate points to the root module of a crate and lists the dependencies of the crate. This is
/// useful in creating the crate graph.
#[derive(Clone, Debug, Deserialize)]
pub struct Crate {
pub(crate) root_module: PathBuf,
pub(crate) edition: Edition,
pub(crate) deps: Vec<Dep>,
// This is the preferred method of providing cfg options.
#[serde(default)]
pub(crate) cfg: FxHashSet<String>,
// These two are here for transition only.
#[serde(default)]
pub(crate) atom_cfgs: FxHashSet<String>,
#[serde(default)]
pub(crate) key_value_cfgs: FxHashMap<String, String>,
pub(crate) out_dir: Option<PathBuf>,
pub(crate) proc_macro_dylib_path: Option<PathBuf>,
}
#[derive(Clone, Copy, Debug, Deserialize)]
#[serde(rename = "edition")]
pub enum Edition {
#[serde(rename = "2015")]
Edition2015,
#[serde(rename = "2018")]
Edition2018,
}
/// Identifies a crate by position in the crates array.
#[derive(Clone, Copy, Debug, Deserialize, Eq, Hash, Ord, PartialEq, PartialOrd)]
#[serde(transparent)]
pub struct CrateId(pub usize);
/// A dependency of a crate, identified by its id in the crates array and name.
#[derive(Clone, Debug, Deserialize)]
pub struct Dep {
#[serde(rename = "crate")]
pub(crate) krate: CrateId,
pub(crate) name: String,
}
#[cfg(test)]
mod tests {
use super::*;
use serde_json::json;
#[test]
fn test_crate_deserialization() {
let raw_json = json!( {
"crate_id": 2,
"root_module": "this/is/a/file/path.rs",
"deps": [
{
"crate": 1,
"name": "some_dep_crate"
},
],
"edition": "2015",
"cfg": [
"atom_1",
"atom_2",
"feature=feature_1",
"feature=feature_2",
"other=value",
],
});
let krate: Crate = serde_json::from_value(raw_json).unwrap();
assert!(krate.cfg.contains(&"atom_1".to_string()));
assert!(krate.cfg.contains(&"atom_2".to_string()));
assert!(krate.cfg.contains(&"feature=feature_1".to_string()));
assert!(krate.cfg.contains(&"feature=feature_2".to_string()));
assert!(krate.cfg.contains(&"other=value".to_string()));
}
#[test]
fn test_crate_deserialization_old_json() {
let raw_json = json!( {
"crate_id": 2,
"root_module": "this/is/a/file/path.rs",
"deps": [
{
"crate": 1,
"name": "some_dep_crate"
},
],
"edition": "2015",
"atom_cfgs": [
"atom_1",
"atom_2",
],
"key_value_cfgs": {
"feature": "feature_1",
"feature": "feature_2",
"other": "value",
},
});
let krate: Crate = serde_json::from_value(raw_json).unwrap();
assert!(krate.atom_cfgs.contains(&"atom_1".to_string()));
assert!(krate.atom_cfgs.contains(&"atom_2".to_string()));
assert!(krate.key_value_cfgs.contains_key(&"feature".to_string()));
assert_eq!(krate.key_value_cfgs.get("feature"), Some(&"feature_2".to_string()));
assert!(krate.key_value_cfgs.contains_key(&"other".to_string()));
assert_eq!(krate.key_value_cfgs.get("other"), Some(&"value".to_string()));
}
}
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