Re-re-fork (#23)

tooling/xtask/src/workspace.rs

@@ -0,0 +1,9 @@
+use anyhow::{Context as _, Result};
+use cargo_metadata::{Metadata, MetadataCommand};
+
+/// Returns the Cargo workspace.
+pub fn load_workspace() -> Result<Metadata> {
+    MetadataCommand::new()
+        .exec()
+        .context("failed to load cargo metadata")
+}