build(router_env): obtain workspace member package names from `cargo_…

…metadata` more deterministically (#4139)

Co-authored-by: Sampras Lopes <lsampras@pm.me>

crates/router_env/Cargo.toml

@@ -8,7 +8,7 @@ readme = "README.md"
 license.workspace = true
 
 [dependencies]
-cargo_metadata = "0.15.4"
+cargo_metadata = "0.18.1"
 config = { version = "0.13.3", features = ["toml"] }
 error-stack = "0.3.1"
 gethostname = "0.4.3"
@@ -34,7 +34,7 @@ vergen = { version = "8.2.1", optional = true, features = ["cargo", "git", "git2
 tokio = { version = "1.36.0", features = ["macros", "rt-multi-thread"] }
 
 [build-dependencies]
-cargo_metadata = "0.15.4"
+cargo_metadata = "0.18.1"
 vergen = { version = "8.2.1", features = ["cargo", "git", "git2", "rustc"], optional = true }
 
 [features]

crates/router_env/src/cargo_workspace.rs

@@ -14,17 +14,11 @@ pub fn set_cargo_workspace_members_env() {
     let metadata = cargo_metadata::MetadataCommand::new()
         .exec()
         .expect("Failed to obtain cargo metadata");
-    let workspace_members = metadata.workspace_members;
 
-    let workspace_members = workspace_members
+    let workspace_members = metadata
+        .workspace_packages()
         .iter()
-        .map(|package_id| {
-            package_id
-                .repr
-                .split_once(' ')
-                .expect("Unknown cargo metadata package ID format")
-                .0
-        })
+        .map(|package| package.name.as_str())
         .collect::<Vec<_>>()
         .join(",");
 
@@ -35,32 +29,28 @@ pub fn set_cargo_workspace_members_env() {
     .expect("Failed to set `CARGO_WORKSPACE_MEMBERS` environment variable");
 }
 
-/// Verify that the cargo metadata workspace members format matches that expected by
+/// Verify that the cargo metadata workspace packages format matches that expected by
 /// [`set_cargo_workspace_members_env`] to set the `CARGO_WORKSPACE_MEMBERS` environment variable.
 ///
 /// This function should be typically called within build scripts, before the
 /// [`set_cargo_workspace_members_env`] function is called.
 ///
 /// # Panics
 ///
-/// Panics if running the `cargo metadata` command fails, or if the workspace members package ID
-/// format cannot be determined.
+/// Panics if running the `cargo metadata` command fails, or if the workspace member package names
+/// cannot be determined.
 pub fn verify_cargo_metadata_format() {
     #[allow(clippy::expect_used)]
     let metadata = cargo_metadata::MetadataCommand::new()
         .exec()
         .expect("Failed to obtain cargo metadata");
-    let workspace_members = metadata.workspace_members;
 
-    let package_id_entry_prefix =
-        format!("{} {}", env!("CARGO_PKG_NAME"), env!("CARGO_PKG_VERSION"));
     assert!(
-        workspace_members
+        metadata
+            .workspace_packages()
             .iter()
-            .any(|package_id| package_id.repr.starts_with(&package_id_entry_prefix)),
-        "Unknown workspace members package ID format. \
-         Please run `cargo metadata --format-version=1 | jq '.workspace_members'` and update this \
-         build script to match the updated package ID format."
+            .any(|package| package.name == env!("CARGO_PKG_NAME")),
+        "Unable to determine workspace member package names from `cargo metadata`"
     );
 }