Auto merge of #14593 - elchukc:fix_cargo_tree_bindep_crosscompile, r=weihanglo

Fix panic when running cargo tree on a package with a cross compiled bindep

### What does this PR try to resolve?

This is an attempt to close out `@rukai's` [PR](#13207 (comment)) for #12358 and #10593 by adjusting the new integration test and resolving merge conflicts.

I have also separated the changes into atomic commits as per [previous review](#13207 (comment)).

### How should we test and review this PR?

The integration test that has been edited here is sufficient, plus the new integration test that confirms a more specific case where `cargo tree` throws an error.

### Additional information

I have confirmed the test `artifact_dep_target_specified` fails on master branch and succeeds on this branch.

The first commit fixes the panic and the integration test. Commits 2 and 3 add other tests that confirm behaviour mentioned in related issues.

Commits:
1. [Fix panic when running cargo tree on a package with a cross compiled bindep](5c5ea78) - fixes some panics and changes the integration test to succeed
2. [test: cargo tree panic on artifact dep target deactivated](ed294ab) - adds test to confirm the behaviour for the specific panic from [#10539 (comment)](#10593 (comment))

Author: bors

src/cargo/ops/tree/graph.rs

@@ -391,10 +391,32 @@ fn add_pkg(
         let dep_pkg = graph.package_map[&dep_id];
 
         for dep in deps {
-            let dep_features_for = if dep.is_build() || dep_pkg.proc_macro() {
-                FeaturesFor::HostDep
-            } else {
-                features_for
+            let dep_features_for = match dep
+                .artifact()
+                .and_then(|artifact| artifact.target())
+                .and_then(|target| target.to_resolved_compile_target(requested_kind))
+            {
+                // Dependency has a `{ …, target = <triple> }`
+                Some(target) => FeaturesFor::ArtifactDep(target),
+                // Get the information of the dependent crate from `features_for`.
+                // If a dependent crate is
+                //
+                // * specified as an artifact dep with a `target`, or
+                // * a host dep,
+                //
+                // its transitive deps, including build-deps, need to be built on that target.
+                None if features_for != FeaturesFor::default() => features_for,
+                // Dependent crate is a normal dep, then back to old rules:
+                //
+                // * normal deps, dev-deps -> inherited target
+                // * build-deps -> host
+                None => {
+                    if dep.is_build() || dep_pkg.proc_macro() {
+                        FeaturesFor::HostDep
+                    } else {
+                        features_for
+                    }
+                }
             };
             let dep_index = add_pkg(
                 graph,

tests/testsuite/artifact_dep.rs

@@ -1568,14 +1568,93 @@ fn artifact_dep_target_specified() {
         .with_status(0)
         .run();
 
-    // TODO: This command currently fails due to a bug in cargo but it should be fixed so that it succeeds in the future.
     p.cargo("tree -Z bindeps")
         .masquerade_as_nightly_cargo(&["bindeps"])
-        .with_stdout_data("")
-        .with_stderr_data(r#"...
-[..]did not find features for (PackageId { name: "bindep", version: "0.0.0", source: "[..]" }, NormalOrDev) within activated_features:[..]
+        .with_stdout_data(str![[r#"
+foo v0.0.0 ([ROOT]/foo)
+└── bindep v0.0.0 ([ROOT]/foo/bindep)
+
+"#]])
+        .with_status(0)
+        .run();
+}
+
+/// From issue #10593
+/// The case where:
+/// *   artifact dep is { target = <specified> }
+/// *   dependency of that artifact dependency specifies the same target
+/// *   the target is not activated.
+#[cargo_test]
+fn dep_of_artifact_dep_same_target_specified() {
+    if cross_compile::disabled() {
+        return;
+    }
+    let target = cross_compile::alternate();
+    let p = project()
+        .file(
+            "Cargo.toml",
+            &format!(
+                r#"
+                    [package]
+                    name = "foo"
+                    version = "0.1.0"
+                    edition = "2015"
+                    resolver = "2"
+
+                    [dependencies]
+                    bar = {{ path = "bar", artifact = "bin", target = "{target}" }}
+                "#,
+            ),
+        )
+        .file("src/lib.rs", "")
+        .file(
+            "bar/Cargo.toml",
+            &format!(
+                r#"
+                    [package]
+                    name = "bar"
+                    version = "0.1.0"
+
+                    [target.{target}.dependencies]
+                    baz = {{ path = "../baz" }}
+                "#,
+            ),
+        )
+        .file("bar/src/main.rs", "fn main() {}")
+        .file(
+            "baz/Cargo.toml",
+            r#"
+                [package]
+                name = "baz"
+                version = "0.1.0"
+
+            "#,
+        )
+        .file("baz/src/lib.rs", "")
+        .build();
+
+    p.cargo("check -Z bindeps")
+        .masquerade_as_nightly_cargo(&["bindeps"])
+        .with_stderr_data(str![[r#"
+[LOCKING] 2 packages to latest compatible versions
+[COMPILING] baz v0.1.0 ([ROOT]/foo/baz)
+[COMPILING] bar v0.1.0 ([ROOT]/foo/bar)
+[CHECKING] foo v0.1.0 ([ROOT]/foo)
+[FINISHED] `dev` profile [unoptimized + debuginfo] target(s) in [ELAPSED]s
+
+"#]])
+        .with_status(0)
+        .run();
+
+    // TODO This command currently fails due to a bug in cargo but it should be fixed so that it succeeds in the future.
+    p.cargo("tree -Z bindeps")
+        .masquerade_as_nightly_cargo(&["bindeps"])
+        .with_stderr_data(
+            r#"...
+no entry found for key
 ...
-"#)
+"#,
+        )
         .with_status(101)
         .run();
 }