fix(bindeps): do not propagate artifact dependency to proc macro or build deps

src/cargo/core/profiles.rs

@@ -1177,12 +1177,18 @@ impl UnitFor {
         } else {
             self.panic_setting
         };
+        let artifact_target_for_features =
+            if dep_target.proc_macro() || parent.target.is_custom_build() {
+                None
+            } else {
+                self.artifact_target_for_features
+            };
         UnitFor {
             host: self.host || dep_for_host,
             host_features,
             panic_setting,
             root_compile_kind,
-            artifact_target_for_features: self.artifact_target_for_features,
+            artifact_target_for_features,
         }
     }
 

src/cargo/core/resolver/features.rs

@@ -906,11 +906,11 @@ impl<'a, 'gctx> FeatureResolver<'a, 'gctx> {
                         // All this may result in a dependency being built multiple times
                         // for various targets which are either specified in the manifest
                         // or on the cargo command-line.
-                        let lib_fk = if fk == FeaturesFor::default() {
-                            (self.track_for_host
-                                && (dep.is_build() || self.has_proc_macro_lib(dep_id)))
-                            .then(|| FeaturesFor::HostDep)
-                            .unwrap_or_default()
+                        let lib_fk = if fk != FeaturesFor::HostDep
+                            && self.track_for_host
+                            && (dep.is_build() || self.has_proc_macro_lib(dep_id))
+                        {
+                            FeaturesFor::HostDep
                         } else {
                             fk
                         };

tests/testsuite/artifact_dep.rs

@@ -3394,3 +3394,179 @@ staticlib present: true
 "#]],
     );
 }
+
+#[cargo_test]
+fn artifact_dep_target_does_not_propagate_to_deps_of_build_script() {
+    if cross_compile_disabled() {
+        return;
+    }
+    let bindeps_target = cross_compile::alternate();
+    let native_target = cross_compile::native();
+
+    let p = project()
+        .file(
+            "Cargo.toml",
+            &r#"
+            [package]
+            name = "foo"
+            version = "0.0.1"
+            edition = "2015"
+            resolver = "2"
+
+            [dependencies.artifact]
+            path = "artifact"
+            artifact = "bin"
+            target = "$TARGET"
+        "#
+            .replace("$TARGET", bindeps_target),
+        )
+        .file(
+            "src/main.rs",
+            r#"
+            fn main() {
+                let _b = include_bytes!(env!("CARGO_BIN_FILE_ARTIFACT"));
+            }
+        "#,
+        )
+        .file(
+            "artifact/Cargo.toml",
+            r#"
+            [package]
+            name = "artifact"
+            version = "0.0.1"
+            edition = "2015"
+
+            [build-dependencies]
+            builder = { path = "../builder" }
+            "#,
+        )
+        .file("artifact/src/main.rs", "fn main() { }")
+        .file(
+            "artifact/build.rs",
+            r#"
+            extern crate builder;
+            fn main() {
+                let _ = builder::add(1, 2);
+            }
+            "#,
+        )
+        .file(
+            "builder/Cargo.toml",
+            &r#"
+            [package]
+            name = "builder"
+            version = "0.0.1"
+            edition = "2015"
+
+            [target.'$TARGET'.dependencies]
+            arch = { path = "../arch" }
+            "#
+            .replace("$TARGET", native_target),
+        )
+        .file(
+            "builder/src/lib.rs",
+            r#"
+            extern crate arch;
+            pub fn add(a: i32, b: i32) -> i32 { arch::add(a, b) }
+            "#,
+        )
+        .file(
+            "arch/Cargo.toml",
+            r#"
+            [package]
+            name = "arch"
+            version = "0.0.1"
+            edition = "2015"
+            "#,
+        )
+        .file(
+            "arch/src/lib.rs",
+            r#"pub fn add(a: i32, b: i32) -> i32 { a + b }"#,
+        )
+        .build();
+    p.cargo("test -Z bindeps")
+        .masquerade_as_nightly_cargo(&["bindeps"])
+        .run();
+}
+
+#[cargo_test]
+fn artifact_dep_target_does_not_propagate_to_proc_macro() {
+    if cross_compile_disabled() {
+        return;
+    }
+    let bindeps_target = cross_compile::alternate();
+    let native_target = cross_compile::native();
+
+    let p = project()
+        .file(
+            "Cargo.toml",
+            &r#"
+            [package]
+            name = "foo"
+            version = "0.0.1"
+            edition = "2015"
+            resolver = "2"
+
+            [dependencies.artifact]
+            path = "artifact"
+            artifact = "bin"
+            target = "$TARGET"
+        "#
+            .replace("$TARGET", bindeps_target),
+        )
+        .file(
+            "src/main.rs",
+            r#"
+            fn main() {
+                let _b = include_bytes!(env!("CARGO_BIN_FILE_ARTIFACT"));
+            }
+        "#,
+        )
+        .file(
+            "artifact/Cargo.toml",
+            r#"
+            [package]
+            name = "artifact"
+            version = "0.0.1"
+            edition = "2015"
+
+            [dependencies]
+            macro = { path = "../macro" }
+            "#,
+        )
+        .file("artifact/src/main.rs", "fn main() { }")
+        .file(
+            "macro/Cargo.toml",
+            &r#"
+            [package]
+            name = "macro"
+            version = "0.0.1"
+            edition = "2015"
+
+            [lib]
+            proc-macro = true
+
+            [target.'$TARGET'.dependencies]
+            arch = { path = "../arch" }
+            "#
+            .replace("$TARGET", native_target),
+        )
+        .file("macro/src/lib.rs", "")
+        .file(
+            "arch/Cargo.toml",
+            r#"
+            [package]
+            name = "arch"
+            version = "0.0.1"
+            edition = "2015"
+            "#,
+        )
+        .file(
+            "arch/src/lib.rs",
+            "pub fn add(a: i32, b: i32) -> i32 { a + b }",
+        )
+        .build();
+    p.cargo("test -Z bindeps")
+        .masquerade_as_nightly_cargo(&["bindeps"])
+        .run();
+}