Warning for no lib dependencies

Signed-off-by: hi-rustin <rustin.liu@gmail.com>

Author: 0xPoe

src/cargo/ops/resolve.rs

@@ -171,6 +171,22 @@ pub fn resolve_ws_with_opts<'cfg>(
         feature_opts,
     )?;
 
+    // Check if there are any dependency packages that do not have any libs.
+    if let Some(r) = resolve.as_ref() {
+        for id in member_ids.iter() {
+            for (package_id, _) in r.deps(*id) {
+                if let Ok(dep_pkg) = pkg_set.get_one(package_id) {
+                    if !dep_pkg.targets().iter().any(|t| t.is_lib()) {
+                        ws.config().shell().warn(format!(
+                            "No library were found in package `{}`",
+                            dep_pkg.name()
+                        ))?
+                    }
+                }
+            }
+        }
+    }
+
     Ok(WorkspaceResolve {
         pkg_set,
         workspace_resolve: resolve,

tests/testsuite/run.rs

@@ -723,6 +723,48 @@ fn run_dylib_dep() {
     p.cargo("run hello world").run();
 }
 
+#[cargo_test]
+fn run_with_bin_dep() {
+    let p = project()
+        .file(
+            "Cargo.toml",
+            r#"
+                [package]
+                name = "foo"
+                version = "0.0.1"
+
+                [dependencies.bar]
+                path = "bar"
+            "#,
+        )
+        .file("src/main.rs", r#"fn main() { println!("hello"); }"#)
+        .file(
+            "bar/Cargo.toml",
+            r#"
+                [package]
+                name = "bar"
+                version = "0.0.1"
+                authors = []
+
+                [[bin]]
+                name = "bar"
+            "#,
+        )
+        .file("bar/src/main.rs", r#"fn main() { println!("bar"); }"#)
+        .build();
+
+    p.cargo("run")
+        .with_stderr(
+            "\
+[WARNING] No library were found in package `bar`
+[COMPILING] foo v0.0.1 ([CWD])
+[FINISHED] dev [unoptimized + debuginfo] target(s) in [..]
+[RUNNING] `target/debug/foo[EXE]`",
+        )
+        .with_stdout("hello")
+        .run();
+}
+
 #[cargo_test]
 fn release_works() {
     let p = project()