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|
use cargo_metadata::{metadata_run, CargoOpt};
use ra_syntax::SmolStr;
use rustc_hash::{FxHashMap, FxHashSet};
use std::path::{Path, PathBuf};
use crate::{
thread_watcher::{ThreadWatcher, Worker},
Result,
};
#[derive(Debug, Clone)]
pub struct CargoWorkspace {
packages: Vec<PackageData>,
targets: Vec<TargetData>,
}
#[derive(Clone, Copy, Debug, Serialize)]
pub struct Package(usize);
#[derive(Clone, Copy, Debug, Serialize)]
pub struct Target(usize);
#[derive(Debug, Clone)]
struct PackageData {
name: SmolStr,
manifest: PathBuf,
targets: Vec<Target>,
is_member: bool,
}
#[derive(Debug, Clone)]
struct TargetData {
pkg: Package,
name: SmolStr,
root: PathBuf,
kind: TargetKind,
}
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum TargetKind {
Bin,
Lib,
Example,
Test,
Bench,
Other,
}
impl Package {
pub fn name(self, ws: &CargoWorkspace) -> &str {
ws.pkg(self).name.as_str()
}
pub fn root(self, ws: &CargoWorkspace) -> &Path {
ws.pkg(self).manifest.parent().unwrap()
}
pub fn targets<'a>(self, ws: &'a CargoWorkspace) -> impl Iterator<Item = Target> + 'a {
ws.pkg(self).targets.iter().cloned()
}
pub fn is_member(self, ws: &CargoWorkspace) -> bool {
ws.pkg(self).is_member
}
}
impl Target {
pub fn package(self, ws: &CargoWorkspace) -> Package {
ws.tgt(self).pkg
}
pub fn name(self, ws: &CargoWorkspace) -> &str {
ws.tgt(self).name.as_str()
}
pub fn root(self, ws: &CargoWorkspace) -> &Path {
ws.tgt(self).root.as_path()
}
pub fn kind(self, ws: &CargoWorkspace) -> TargetKind {
ws.tgt(self).kind
}
}
impl CargoWorkspace {
pub fn from_cargo_metadata(path: &Path) -> Result<CargoWorkspace> {
let cargo_toml = find_cargo_toml(path)?;
let meta = metadata_run(
Some(cargo_toml.as_path()),
true,
Some(CargoOpt::AllFeatures),
)
.map_err(|e| format_err!("cargo metadata failed: {}", e))?;
let mut pkg_by_id = FxHashMap::default();
let mut packages = Vec::new();
let mut targets = Vec::new();
let ws_members: FxHashSet<String> = meta
.workspace_members
.into_iter()
.map(|it| it.raw)
.collect();
for meta_pkg in meta.packages {
let pkg = Package(packages.len());
let is_member = ws_members.contains(&meta_pkg.id);
pkg_by_id.insert(meta_pkg.id.clone(), pkg);
let mut pkg_data = PackageData {
name: meta_pkg.name.into(),
manifest: PathBuf::from(meta_pkg.manifest_path),
targets: Vec::new(),
is_member,
};
for meta_tgt in meta_pkg.targets {
let tgt = Target(targets.len());
targets.push(TargetData {
pkg,
name: meta_tgt.name.into(),
root: PathBuf::from(meta_tgt.src_path),
kind: TargetKind::new(meta_tgt.kind.as_slice()),
});
pkg_data.targets.push(tgt);
}
packages.push(pkg_data)
}
Ok(CargoWorkspace { packages, targets })
}
pub fn packages<'a>(&'a self) -> impl Iterator<Item = Package> + 'a {
(0..self.packages.len()).map(Package)
}
pub fn target_by_root(&self, root: &Path) -> Option<Target> {
self.packages()
.filter_map(|pkg| pkg.targets(self).find(|it| it.root(self) == root))
.next()
}
fn pkg(&self, pkg: Package) -> &PackageData {
&self.packages[pkg.0]
}
fn tgt(&self, tgt: Target) -> &TargetData {
&self.targets[tgt.0]
}
}
fn find_cargo_toml(path: &Path) -> Result<PathBuf> {
if path.ends_with("Cargo.toml") {
return Ok(path.to_path_buf());
}
let mut curr = Some(path);
while let Some(path) = curr {
let candidate = path.join("Cargo.toml");
if candidate.exists() {
return Ok(candidate);
}
curr = path.parent();
}
bail!("can't find Cargo.toml at {}", path.display())
}
impl TargetKind {
fn new(kinds: &[String]) -> TargetKind {
for kind in kinds {
return match kind.as_str() {
"bin" => TargetKind::Bin,
"test" => TargetKind::Test,
"bench" => TargetKind::Bench,
"example" => TargetKind::Example,
_ if kind.contains("lib") => TargetKind::Lib,
_ => continue,
};
}
TargetKind::Other
}
}
pub fn workspace_loader() -> (Worker<PathBuf, Result<CargoWorkspace>>, ThreadWatcher) {
Worker::<PathBuf, Result<CargoWorkspace>>::spawn(
"workspace loader",
1,
|input_receiver, output_sender| {
input_receiver
.into_iter()
.map(|path| CargoWorkspace::from_cargo_metadata(path.as_path()))
.for_each(|it| output_sender.send(it))
},
)
}
|
