Port the no-linkable-target message

Author: jneem

src/cargo/core/compiler/mod.rs

@@ -1717,15 +1717,16 @@ fn build_deps_args(
         if let Some(dep) = deps.iter().find(|dep| {
             !dep.unit.mode.is_doc() && dep.unit.target.is_lib() && !dep.unit.artifact.is_true()
         }) {
-            bcx.gctx.shell().warn(format!(
-                "The package `{}` \
-                 provides no linkable target. The compiler might raise an error while compiling \
-                 `{}`. Consider adding 'dylib' or 'rlib' to key `crate-type` in `{}`'s \
-                 Cargo.toml. This warning might turn into a hard error in the future.",
-                dep.unit.target.crate_name(),
-                unit.target.crate_name(),
-                dep.unit.target.crate_name()
-            ))?;
+            let dep_name = dep.unit.target.crate_name();
+            let name = unit.target.crate_name();
+            bcx.gctx.shell().print_report(&[
+                Level::WARNING.secondary_title(format!("the package `{dep_name}` provides no linkable target"))
+                    .elements([
+                        Level::NOTE.message(format!("this might cause `{name}` to fail compilation")),
+                        Level::NOTE.message("this warning might turn into a hard error in the future"),
+                        Level::HELP.message(format!("consider adding 'dylib' or 'rlib' to key 'crate-type' in `{dep_name}`'s Cargo.toml"))
+                    ])
+            ], false)?;
         }
     }
 

tests/testsuite/build.rs

@@ -5335,7 +5335,11 @@ fn no_linkable_target() {
     p.cargo("build")
         .with_stderr_data(str![[r#"
 [LOCKING] 1 package to latest compatible version
-[WARNING] The package `the_lib` provides no linkable target. The compiler might raise an error while compiling `foo`. Consider adding 'dylib' or 'rlib' to key `crate-type` in `the_lib`'s Cargo.toml. This warning might turn into a hard error in the future.
+[WARNING] the package `the_lib` provides no linkable target
+  |
+  = [NOTE] this might cause `foo` to fail compilation
+  = [NOTE] this warning might turn into a hard error in the future
+  = [HELP] consider adding 'dylib' or 'rlib' to key 'crate-type' in `the_lib`'s Cargo.toml
 [COMPILING] the_lib v0.1.0 ([ROOT]/foo/the_lib)
 [COMPILING] foo v0.1.0 ([ROOT]/foo)
 [FINISHED] `dev` profile [unoptimized + debuginfo] target(s) in [ELAPSED]s