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|
use std::{
collections::HashMap,
path::{Path, PathBuf},
};
use cargo_metadata::{metadata_run, CargoOpt};
use crossbeam_channel::{bounded, Sender, Receiver};
use libsyntax2::SmolStr;
use {
Result,
thread_watcher::ThreadWatcher,
};
#[derive(Debug, Serialize, Clone)]
pub struct CargoWorkspace {
ws_members: Vec<Package>,
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, Serialize, Clone)]
struct PackageData {
name: SmolStr,
manifest: PathBuf,
targets: Vec<Target>
}
#[derive(Debug, Serialize, Clone)]
struct TargetData {
pkg: Package,
name: SmolStr,
root: PathBuf,
kind: TargetKind,
}
#[derive(Debug, Serialize, 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 manifest(self, ws: &CargoWorkspace) -> &Path {
ws.pkg(self).manifest.as_path()
}
pub fn targets<'a>(self, ws: &'a CargoWorkspace) -> impl Iterator<Item=Target> + 'a {
ws.pkg(self).targets.iter().cloned()
}
}
impl Target {
pub fn pkg(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 = HashMap::new();
let mut packages = Vec::new();
let mut targets = Vec::new();
for meta_pkg in meta.packages {
let pkg = Package(packages.len());
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(),
};
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)
}
let ws_members = meta.workspace_members
.iter()
.map(|it| pkg_by_id[&it.raw])
.collect();
Ok(CargoWorkspace { packages, targets, ws_members })
}
pub fn packages<'a>(&'a self) -> impl Iterator<Item=Package> + 'a {
(0..self.packages.len()).map(Package)
}
pub fn ws_members<'a>(&'a self) -> impl Iterator<Item=Package> + 'a {
self.ws_members.iter().cloned()
}
pub fn target_by_roo(&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() -> (Sender<PathBuf>, Receiver<Result<CargoWorkspace>>, ThreadWatcher) {
let (path_sender, path_receiver) = bounded::<PathBuf>(16);
let (ws_sender, ws_receiver) = bounded::<Result<CargoWorkspace>>(1);
let thread = ThreadWatcher::spawn("workspace loader", move || {
path_receiver
.into_iter()
.map(|path| CargoWorkspace::from_cargo_metadata(path.as_path()))
.for_each(|it| ws_sender.send(it))
});
(path_sender, ws_receiver, thread)
}
|
