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use std::collections::HashMap;
use std::collections::HashSet;
use std::path::PathBuf;
use std::process::Command;
use build_helper::output;
use serde::Deserialize;
use crate::cache::INTERNER;
use crate::{Build, Crate};
#[derive(Deserialize)]
struct Output {
packages: Vec<Package>,
resolve: Resolve,
}
#[derive(Deserialize)]
struct Package {
id: String,
name: String,
source: Option<String>,
manifest_path: String,
}
#[derive(Deserialize)]
struct Resolve {
nodes: Vec<ResolveNode>,
}
#[derive(Deserialize)]
struct ResolveNode {
id: String,
dependencies: Vec<String>,
}
pub fn build(build: &mut Build) {
let mut resolves = Vec::new();
build_krate(&build.std_features(), build, &mut resolves, "src/libstd");
build_krate("", build, &mut resolves, "src/libtest");
build_krate(&build.rustc_features(), build, &mut resolves, "src/rustc");
let mut id2name = HashMap::with_capacity(build.crates.len());
for (name, krate) in build.crates.iter() {
id2name.insert(krate.id.clone(), name.clone());
}
for node in resolves {
let name = match id2name.get(&node.id) {
Some(name) => name,
None => continue,
};
let krate = build.crates.get_mut(name).unwrap();
for dep in node.dependencies.iter() {
let dep = match id2name.get(dep) {
Some(dep) => dep,
None => continue,
};
krate.deps.insert(*dep);
}
}
}
fn build_krate(features: &str, build: &mut Build, resolves: &mut Vec<ResolveNode>, krate: &str) {
// Run `cargo metadata` to figure out what crates we're testing.
//
// Down below we're going to call `cargo test`, but to test the right set
// of packages we're going to have to know what `-p` arguments to pass it
// to know what crates to test. Here we run `cargo metadata` to learn about
// the dependency graph and what `-p` arguments there are.
let mut cargo = Command::new(&build.initial_cargo);
cargo
.arg("metadata")
.arg("--format-version")
.arg("1")
.arg("--features")
.arg(features)
.arg("--manifest-path")
.arg(build.src.join(krate).join("Cargo.toml"));
let output = output(&mut cargo);
let output: Output = serde_json::from_str(&output).unwrap();
for package in output.packages {
if package.source.is_none() {
let name = INTERNER.intern_string(package.name);
let mut path = PathBuf::from(package.manifest_path);
path.pop();
build.crates.insert(name, Crate { name, id: package.id, deps: HashSet::new(), path });
}
}
resolves.extend(output.resolve.nodes);
}
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