Add proc-macro to the index.

Cargo.toml

@@ -22,7 +22,7 @@ path = "src/cargo/lib.rs"
 atty = "0.2"
 bytesize = "1.0"
 cargo-platform = { path = "crates/cargo-platform", version = "0.1.1" }
-crates-io = { path = "crates/crates-io", version = "0.31" }
+crates-io = { path = "crates/crates-io", version = "0.32" }
 crossbeam-utils = "0.7"
 crypto-hash = "0.3.1"
 curl = { version = "0.4.23", features = ["http2"] }

crates/crates-io/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "crates-io"
-version = "0.31.0"
+version = "0.32.0"
 edition = "2018"
 authors = ["Alex Crichton <alex@alexcrichton.com>"]
 license = "MIT OR Apache-2.0"

crates/crates-io/lib.rs

@@ -54,8 +54,8 @@ pub struct NewCrate {
     pub license_file: Option<String>,
     pub repository: Option<String>,
     pub badges: BTreeMap<String, BTreeMap<String, String>>,
-    #[serde(default)]
     pub links: Option<String>,
+    pub proc_macro: bool,
 }
 
 #[derive(Serialize)]

src/cargo/core/summary.rs

@@ -30,6 +30,11 @@ struct Inner {
     checksum: Option<String>,
     links: Option<InternedString>,
     namespaced_features: bool,
+    /// Whether or not this package is a proc-macro library.
+    ///
+    /// This was added in 2020. Packages published before this will always be
+    /// `false`.
+    proc_macro: bool,
 }
 
 impl Summary {
@@ -39,6 +44,7 @@ impl Summary {
         features: &BTreeMap<K, Vec<impl AsRef<str>>>,
         links: Option<impl Into<InternedString>>,
         namespaced_features: bool,
+        proc_macro: bool,
     ) -> CargoResult<Summary>
     where
         K: Borrow<str> + Ord + Display,
@@ -68,6 +74,7 @@ impl Summary {
                 checksum: None,
                 links: links.map(|l| l.into()),
                 namespaced_features,
+                proc_macro,
             }),
         })
     }

src/cargo/ops/registry.rs

@@ -255,6 +255,7 @@ fn transmit(
             )
         })
         .collect::<BTreeMap<String, Vec<String>>>();
+    let proc_macro = pkg.targets().iter().any(|target| target.proc_macro());
 
     let publish = registry.publish(
         &NewCrate {
@@ -275,6 +276,7 @@ fn transmit(
             license_file: license_file.clone(),
             badges: badges.clone(),
             links: links.clone(),
+            proc_macro,
         },
         tarball,
     );

src/cargo/sources/registry/index.rs

@@ -715,14 +715,23 @@ impl IndexSummary {
             features,
             yanked,
             links,
+            pm,
         } = serde_json::from_slice(line)?;
         log::trace!("json parsed registry {}/{}", name, vers);
         let pkgid = PackageId::new(name, &vers, source_id)?;
         let deps = deps
             .into_iter()
             .map(|dep| dep.into_dep(source_id))
             .collect::<CargoResult<Vec<_>>>()?;
-        let mut summary = Summary::new(pkgid, deps, &features, links, false)?;
+        let namespaced_features = false;
+        let mut summary = Summary::new(
+            pkgid,
+            deps,
+            &features,
+            links,
+            namespaced_features,
+            pm.unwrap_or(false),
+        )?;
         summary.set_checksum(cksum);
         Ok(IndexSummary {
             summary,

src/cargo/sources/registry/mod.rs

@@ -217,6 +217,7 @@ pub struct RegistryConfig {
     pub api: Option<String>,
 }
 
+/// A single line in the index representing a single version of a package.
 #[derive(Deserialize)]
 pub struct RegistryPackage<'a> {
     name: InternedString,
@@ -225,8 +226,21 @@ pub struct RegistryPackage<'a> {
     deps: Vec<RegistryDependency<'a>>,
     features: BTreeMap<InternedString, Vec<InternedString>>,
     cksum: String,
+    /// If `true`, Cargo will skip this version when resolving.
+    ///
+    /// This was added in 2014. Everything in the crates.io index has this set
+    /// now, so this probably doesn't need to be an option anymore.
     yanked: Option<bool>,
+    /// Native library name this package links to.
+    ///
+    /// Added early 2018 (see https://github.com/rust-lang/cargo/pull/4978),
+    /// can be `None` if published before then.
     links: Option<InternedString>,
+    /// Whether or not this package is a proc-macro library.
+    ///
+    /// If `None`, then the status is unknown (crate was published before this
+    /// field was added), and generally should be treated as `false.`
+    pm: Option<bool>,
 }
 
 #[test]

src/cargo/util/toml/mod.rs

@@ -1146,19 +1146,23 @@ impl TomlManifest {
             features.require(Feature::namespaced_features())?;
         }
 
+        let summary_features = me
+            .features
+            .as_ref()
+            .map(|x| {
+                x.iter()
+                    .map(|(k, v)| (k.as_str(), v.iter().collect()))
+                    .collect()
+            })
+            .unwrap_or_else(BTreeMap::new);
+        let proc_macro = targets.iter().any(|target| target.proc_macro());
         let summary = Summary::new(
             pkgid,
             deps,
-            &me.features
-                .as_ref()
-                .map(|x| {
-                    x.iter()
-                        .map(|(k, v)| (k.as_str(), v.iter().collect()))
-                        .collect()
-                })
-                .unwrap_or_else(BTreeMap::new),
+            &summary_features,
             project.links.as_deref(),
             project.namespaced_features.unwrap_or(false),
+            proc_macro,
         )?;
         let metadata = ManifestMetadata {
             description: project.description.clone(),

tests/testsuite/alt_registry.rs

@@ -357,6 +357,7 @@ fn publish_with_registry_dependency() {
             "license_file": null,
             "links": null,
             "name": "foo",
+            "proc_macro": false,
             "readme": null,
             "readme_file": null,
             "repository": null,
@@ -456,6 +457,7 @@ fn publish_to_alt_registry() {
             "license_file": null,
             "links": null,
             "name": "foo",
+            "proc_macro": false,
             "readme": null,
             "readme_file": null,
             "repository": null,
@@ -519,6 +521,7 @@ fn publish_with_crates_io_dep() {
             "license_file": null,
             "links": null,
             "name": "foo",
+            "proc_macro": false,
             "readme": null,
             "readme_file": null,
             "repository": null,

tests/testsuite/publish.rs

@@ -23,6 +23,7 @@ const CLEAN_FOO_JSON: &str = r#"
         "license_file": null,
         "links": null,
         "name": "foo",
+        "proc_macro": false,
         "readme": null,
         "readme_file": null,
         "repository": "foo",
@@ -47,6 +48,7 @@ fn validate_upload_foo() {
           "license_file": null,
           "links": null,
           "name": "foo",
+          "proc_macro": false,
           "readme": null,
           "readme_file": null,
           "repository": null,
@@ -979,6 +981,7 @@ fn publish_with_patch() {
           "license_file": null,
           "links": null,
           "name": "foo",
+          "proc_macro": false,
           "readme": null,
           "readme_file": null,
           "repository": null,
@@ -1148,6 +1151,7 @@ fn publish_git_with_version() {
           "license_file": null,
           "links": null,
           "name": "foo",
+          "proc_macro": false,
           "readme": null,
           "readme_file": null,
           "repository": null,
@@ -1235,6 +1239,7 @@ fn publish_dev_dep_no_version() {
           "license_file": null,
           "links": null,
           "name": "foo",
+          "proc_macro": false,
           "readme": null,
           "readme_file": null,
           "repository": "foo",
@@ -1295,3 +1300,66 @@ fn credentials_ambiguous_filename() {
 
     validate_upload_foo();
 }
+
+#[cargo_test]
+fn publish_proc_macro() {
+    registry::init();
+
+    let p = project()
+        .file(
+            "Cargo.toml",
+            r#"
+            [project]
+            name = "foo"
+            version = "0.0.1"
+            authors = []
+            license = "MIT"
+            description = "foo"
+            edition = "2018"
+            homepage = "https://example.com"
+
+            [lib]
+            proc-macro = true
+        "#,
+        )
+        .file("src/lib.rs", "")
+        .build();
+
+    p.cargo("publish --no-verify --index")
+        .arg(registry_url().to_string())
+        .with_stderr(
+            "\
+[UPDATING] [..]
+[PACKAGING] foo v0.0.1 ([CWD])
+[UPLOADING] foo v0.0.1 ([CWD])
+",
+        )
+        .run();
+
+    publish::validate_upload(
+        r#"
+        {
+          "authors": [],
+          "badges": {},
+          "categories": [],
+          "deps": [],
+          "description": "foo",
+          "documentation": null,
+          "features": {},
+          "homepage": "https://example.com",
+          "keywords": [],
+          "license": "MIT",
+          "license_file": null,
+          "links": null,
+          "name": "foo",
+          "proc_macro": true,
+          "readme": null,
+          "readme_file": null,
+          "repository": null,
+          "vers": "0.0.1"
+          }
+        "#,
+        "foo-0.0.1.crate",
+        &["Cargo.toml", "Cargo.toml.orig", "src/lib.rs"],
+    );
+}