1 files changed, 59 insertions, 0 deletions
diff --git a/src/bootstrap/metadata.rs b/src/bootstrap/metadata.rs
new file mode 100644
index 000000000..e193e70a0
--- /dev/null
+++ b/src/bootstrap/metadata.rs
@@ -0,0 +1,59 @@
+use std::path::PathBuf;
+use std::process::Command;
+
+use serde::Deserialize;
+
+use crate::cache::INTERNER;
+use crate::util::output;
+use crate::{Build, Crate};
+
+#[derive(Deserialize)]
+struct Output {
+    packages: Vec<Package>,
+}
+
+#[derive(Deserialize)]
+struct Package {
+    name: String,
+    source: Option<String>,
+    manifest_path: String,
+    dependencies: Vec<Dependency>,
+}
+
+#[derive(Deserialize)]
+struct Dependency {
+    name: String,
+    source: Option<String>,
+}
+
+pub fn build(build: &mut Build) {
+    // Run `cargo metadata` to figure out what crates we're testing.
+    let mut cargo = Command::new(&build.initial_cargo);
+    cargo
+        .arg("metadata")
+        .arg("--format-version")
+        .arg("1")
+        .arg("--no-deps")
+        .arg("--manifest-path")
+        .arg(build.src.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();
+            let deps = package
+                .dependencies
+                .into_iter()
+                .filter(|dep| dep.source.is_none())
+                .map(|dep| INTERNER.intern_string(dep.name))
+                .collect();
+            let krate = Crate { name, deps, path };
+            let relative_path = krate.local_path(build);
+            build.crates.insert(name, krate);
+            let existing_path = build.crate_paths.insert(relative_path, name);
+            assert!(existing_path.is_none(), "multiple crates with the same path");
+        }
+    }
+}