cargo: Expose features as Meson boolean options

6 files changed, 53 insertions, 2 deletions

diff --git a/test cases/rust/22 cargo subproject/subprojects/bar-rs/Cargo.toml b/test cases/rust/22 cargo subproject/subprojects/bar-rs/Cargo.toml
index 232b4d7d4..d60a5d8f1 100644
--- a/test cases/rust/22 cargo subproject/subprojects/bar-rs/Cargo.toml
+++ b/test cases/rust/22 cargo subproject/subprojects/bar-rs/Cargo.toml
@@ -1,3 +1,14 @@
 [package]
 name = "bar"
 version = "0.1"
+
+# This dependency does not exist, it is required by default but this subproject
+# is called with default-features=false.
+[dependencies.notfound]
+optional = true
+version = "1.0"
+
+[features]
+default = ["f2"]
+f1 = []
+f2 = ["notfound"]
diff --git a/test cases/rust/22 cargo subproject/subprojects/extra-dep-rs/lib.c b/test cases/rust/22 cargo subproject/subprojects/extra-dep-rs/lib.c
new file mode 100644
index 000000000..c2a0777ce
--- /dev/null
+++ b/test cases/rust/22 cargo subproject/subprojects/extra-dep-rs/lib.c
@@ -0,0 +1,4 @@
+int extra_func(void)
+{
+    return 0;
+}
diff --git a/test cases/rust/22 cargo subproject/subprojects/extra-dep-rs/meson.build b/test cases/rust/22 cargo subproject/subprojects/extra-dep-rs/meson.build
new file mode 100644
index 000000000..3ba7852cf
--- /dev/null
+++ b/test cases/rust/22 cargo subproject/subprojects/extra-dep-rs/meson.build
@@ -0,0 +1,10 @@
+project('extra dep', 'c', version: '1.0')
+
+assert(get_option('feature-default') == true)
+
+l = static_library('extra-dep', 'lib.c')
+d = declare_dependency(link_with: l,
+  variables: {
+    'features': 'default',
+  })
+meson.override_dependency('extra-dep-rs', d)
diff --git a/test cases/rust/22 cargo subproject/subprojects/extra-dep-rs/meson_options.txt b/test cases/rust/22 cargo subproject/subprojects/extra-dep-rs/meson_options.txt
new file mode 100644
index 000000000..9311d9e8f
--- /dev/null
+++ b/test cases/rust/22 cargo subproject/subprojects/extra-dep-rs/meson_options.txt
@@ -0,0 +1 @@
+option('feature-default', type: 'boolean', value: true)
diff --git a/test cases/rust/22 cargo subproject/subprojects/foo-rs/Cargo.toml b/test cases/rust/22 cargo subproject/subprojects/foo-rs/Cargo.toml
index 214c3279c..796548d63 100644
--- a/test cases/rust/22 cargo subproject/subprojects/foo-rs/Cargo.toml
+++ b/test cases/rust/22 cargo subproject/subprojects/foo-rs/Cargo.toml
@@ -6,5 +6,22 @@ edition = "2021"
 [lib]
 crate-type = ["cdylib"]
 
+# This dependency does not exist, verify optional works.
+[dependencies.notfound]
+optional = true
+version = "1.0"
+
+# This dependency is optional but required for f3 which is on by default.
+[dependencies.extra-dep]
+optional = true
+version = "1.0"
+
 [dependencies]
-mybar = { version = "0.1", package = "bar" }
+mybar = { version = "0.1", package = "bar", default-features = false }
+
+[features]
+default = ["f1"]
+f1 = ["f2", "f3"]
+f2 = ["f1"]
+f3 = ["mybar/f1", "dep:extra-dep", "notfound?/invalid"]
+f4 = ["dep:notfound"]
diff --git a/test cases/rust/22 cargo subproject/subprojects/foo-rs/src/lib.rs b/test cases/rust/22 cargo subproject/subprojects/foo-rs/src/lib.rs
index 732d7d20b..4f0a31079 100644
--- a/test cases/rust/22 cargo subproject/subprojects/foo-rs/src/lib.rs
+++ b/test cases/rust/22 cargo subproject/subprojects/foo-rs/src/lib.rs
@@ -1,4 +1,12 @@
+extern "C" {
+    fn extra_func() -> i32;
+}
+
 #[no_mangle]
 pub extern "C" fn rust_func() -> i32 {
-    mybar::VALUE
+    let v: i32;
+    unsafe {
+         v = extra_func();
+    };
+    mybar::VALUE + v
 }