Unrolled build for rust-lang#120084

Rollup merge of rust-lang#120084 - weihanglo:pkgid-spec, r=Mark-Simulacrum

fix(rust-analyzer): use new pkgid spec to compare

Starting from rust-lang/cargo#13311, Cargo's compiler artifact message
uses Package ID specification as package's identifier format.

Zulip topic: https://rust-lang.zulipchat.com/#narrow/stream/246057-t-cargo/topic/proc-macro-test.20bootstrap.20and.20pkgid.20JSON

cc `@ehuss`

src/tools/rust-analyzer/crates/proc-macro-srv/proc-macro-test/build.rs

@@ -92,12 +92,24 @@ fn main() {
         panic!("proc-macro-test-impl failed to build");
     }
 
+    // Old Package ID Spec
+    let repr = format!("{name} {version}");
+    // New Package Id Spec since rust-lang/cargo#13311
+    let pkgid = String::from_utf8(
+        Command::new(toolchain::cargo())
+            .current_dir(&staging_dir)
+            .args(["pkgid", name])
+            .output()
+            .unwrap().stdout,
+    )
+    .unwrap();
+    let pkgid = pkgid.trim();
+
     let mut artifact_path = None;
     for message in Message::parse_stream(output.stdout.as_slice()) {
         if let Message::CompilerArtifact(artifact) = message.unwrap() {
             if artifact.target.kind.contains(&"proc-macro".to_string()) {
-                let repr = format!("{name} {version}");
-                if artifact.package_id.repr.starts_with(&repr) {
+                if artifact.package_id.repr.starts_with(&repr) || artifact.package_id.repr == pkgid {
                     artifact_path = Some(PathBuf::from(&artifact.filenames[0]));
                 }
             }