test cases: add test for cargo workspaces

Extracted from a patch by Xavier Claessens <xclaessens@netflix.com>,
adjusted to make it compile with cargo.

Author: bonzini

test cases/rust/29 cargo workspace/meson.build

@@ -0,0 +1,13 @@
+project('cargo workspace', 'c', 'rust')
+
+foo_rs = dependency('foo-1-rs')
+e = executable('test-foo-1-rs', 'test_foo_1.rs',
+  dependencies: [foo_rs],
+)
+test('test-foo-1-rs', e)
+
+foo_cdylib = dependency('foo-1-cdylib')
+e = executable('test-foo-1-cdylib', 'test_foo_1.c',
+  dependencies: [foo_cdylib],
+)
+test('test-foo-1-rs', e)

test cases/rust/29 cargo workspace/subprojects/foo.wrap

@@ -0,0 +1,5 @@
+[wrap-file]
+method=cargo
+
+[provide]
+dependency_names=foo-1-rs

test cases/rust/29 cargo workspace/subprojects/foo/Cargo.toml

@@ -0,0 +1,15 @@
+[workspace]
+resolver = "2"
+members = [
+    "src/foo",
+    "src/member1"
+]
+default-members = ["src/foo"]
+
+[workspace.package]
+edition = "2021"
+version = "1.0.0"
+
+[workspace.dependencies]
+member1 = { path="./src/member1" }
+member2 = { path="src/member2", features = ["f1"] }

test cases/rust/29 cargo workspace/subprojects/foo/src/foo/Cargo.toml

@@ -0,0 +1,10 @@
+[package]
+name = "foo"
+edition.workspace = true
+version.workspace = true
+
+[lib]
+crate-type = ["lib", "cdylib"]
+
+[dependencies]
+m1 = { path="../member1", package="member1" }

test cases/rust/29 cargo workspace/subprojects/foo/src/foo/src/lib.rs

@@ -0,0 +1,6 @@
+extern crate m1;
+
+#[no_mangle]
+pub extern "C" fn foo() -> i32 {
+    m1::member1() + 1
+}

test cases/rust/29 cargo workspace/subprojects/foo/src/lib.rs

@@ -0,0 +1,3 @@
+pub fn foo() -> i32 {
+    member1::member1() + 1
+}

test cases/rust/29 cargo workspace/subprojects/foo/src/member1/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "member1"
+edition.workspace = true
+version.workspace = true
+
+[dependencies]
+member2 = { workspace = true, features=["f2"] }

test cases/rust/29 cargo workspace/subprojects/foo/src/member1/src/lib.rs

@@ -0,0 +1,5 @@
+extern crate member2;
+
+pub fn member1() -> i32 {
+    member2::member2() + 1
+}

test cases/rust/29 cargo workspace/subprojects/foo/src/member2/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "member2"
+edition.workspace = true
+version.workspace = true
+
+[features]
+default = []
+f1 = []
+f2 = []

test cases/rust/29 cargo workspace/subprojects/foo/src/member2/src/lib.rs

@@ -0,0 +1,5 @@
+#[cfg(feature = "f1")]
+#[cfg(feature = "f2")]
+pub fn member2() -> i32 {
+    1
+}