Use TargetKind enum and Target::is_proc_macro

These are added in cargo_metadata 0.19.0.

test/integration-test/build.rs

@@ -8,7 +8,7 @@ use std::{
 };
 
 use cargo_metadata::{
-    Artifact, CompilerMessage, Message, Metadata, MetadataCommand, Package, Target,
+    Artifact, CompilerMessage, Message, Metadata, MetadataCommand, Package, Target, TargetKind,
 };
 use xtask::{exec, AYA_BUILD_INTEGRATION_BPF, LIBBPF_DIR};
 
@@ -281,7 +281,7 @@ fn main() {
 
         let Package { targets, .. } = integration_ebpf_package;
         for Target { name, kind, .. } in targets {
-            if *kind != ["bin"] {
+            if *kind != [TargetKind::Bin] {
                 continue;
             }
             let dst = out_dir.join(name);

xtask/src/public_api.rs

@@ -56,16 +56,13 @@ pub fn public_api(options: Options, metadata: Metadata) -> Result<()> {
                 if matches!(publish, Some(publish) if publish.is_empty()) {
                     Ok(())
                 } else {
-                    let target = target.as_ref().and_then(|target| {
-                        let proc_macro = targets.iter().any(|Target { kind, .. }| {
-                            kind.iter().any(|kind| kind == "proc-macro")
-                        });
-                        (!proc_macro).then_some(target)
-                    });
+                    let target = (!targets.iter().any(Target::is_proc_macro))
+                        .then(|| target.clone())
+                        .flatten();
                     let diff = check_package_api(
                         &name,
                         toolchain,
-                        target.cloned(),
+                        target,
                         bless,
                         workspace_root.as_std_path(),
                     )