modules: rust: implement more package accessors

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

Author: bonzini

docs/markdown/Rust-module.md

@@ -229,6 +229,47 @@ Positional arguments:
 The package object returned by `workspace.subproject()` provides methods
 for working with individual packages in a Cargo workspace.
 
+### subproject.name()
+
+```meson
+name = pkg.name()
+```
+
+Returns the name of the subproject.
+
+### subproject.version()
+
+```meson
+version = pkg.version()
+```
+
+Returns the normalized version number of the subproject.
+
+### subproject.api()
+
+```meson
+api = pkg.api()
+```
+
+Returns the API version of the subproject, that is the version up to the first
+nonzero element.
+
+### subproject.features()
+
+```meson
+features = pkg.features()
+```
+
+Returns selected features for a specific subproject.
+
+### subproject.all_features()
+
+```meson
+all_features = pkg.all_features()
+```
+
+Returns all defined features for a specific subproject.
+
 ### subproject.dependency()
 
 ```meson

mesonbuild/modules/rust.py

@@ -146,9 +146,44 @@ def __init__(self, rust_ws: RustWorkspace, package: cargo.PackageState) -> None:
         self.rust_ws = rust_ws
         self.package = package
         self.methods.update({
+            'all_features': self.all_features_method,
+            'api': self.api_method,
             'dependency': self.dependency_method,
+            'features': self.features_method,
+            'name': self.name_method,
+            'version': self.version_method,
         })
 
+    @noPosargs
+    @noKwargs
+    def name_method(self, state: ModuleState, args: T.List, kwargs: TYPE_kwargs) -> str:
+        """Returns the name of the package."""
+        return self.package.manifest.package.name
+
+    @noPosargs
+    @noKwargs
+    def api_method(self, state: ModuleState, args: T.List, kwargs: TYPE_kwargs) -> str:
+        """Returns the API version of the package."""
+        return self.package.manifest.package.api
+
+    @noPosargs
+    @noKwargs
+    def version_method(self, state: ModuleState, args: T.List, kwargs: TYPE_kwargs) -> str:
+        """Returns the version of the package."""
+        return self.package.manifest.package.version
+
+    @noPosargs
+    @noKwargs
+    def all_features_method(self, state: ModuleState, args: T.List, kwargs: TYPE_kwargs) -> T.List[str]:
+        """Returns all features for specific package."""
+        return sorted(list(self.package.manifest.features.keys()))
+
+    @noPosargs
+    @noKwargs
+    def features_method(self, state: ModuleState, args: T.List, kwargs: TYPE_kwargs) -> T.List[str]:
+        """Returns chosen features for specific package."""
+        return sorted(list(self.package.cfg.features))
+
     @noPosargs
     @typed_kwargs('package.dependency',
                   KwargInfo('rust_abi', (str, NoneType), default=None, validator=in_set_validator({'rust', 'c', 'proc-macro'})))

test cases/rust/31 rust.workspace package/Cargo.toml

@@ -4,8 +4,10 @@ version = "0.1.0"
 edition = "2021"
 
 [features]
-default = ["dep:answer"]
+default = ["feature1", "hello?/goodbye"]
+feature1 = ["answer/large", "dep:hello"]
+feature2 = []
 
 [dependencies]
-hello = { version = "1.0", path = "subprojects/hello-1.0" }
+hello = { version = "1.0", path = "subprojects/hello-1.0", optional = true }
 answer = { version = "2.1", path = "subprojects/answer-2.1", optional = true }

test cases/rust/31 rust.workspace package/meson.build

@@ -7,7 +7,18 @@ cargo = rust.workspace()
 assert(cargo.packages() == ['answer', 'hello', 'package_test'])
 
 hello_rs = cargo.subproject('hello')
+assert(hello_rs.name() == 'hello')
+assert(hello_rs.version() == '1.0.0')
+assert(hello_rs.api() == '1')
+assert(hello_rs.all_features() == ['default', 'goodbye'])
+assert(hello_rs.features() == ['default', 'goodbye'])
+
 answer_rs = cargo.subproject('answer', '2')
+assert(answer_rs.name() == 'answer')
+assert(answer_rs.version() == '2.1.0')
+assert(answer_rs.api() == '2')
+assert(answer_rs.all_features() == ['default', 'large'])
+assert(answer_rs.features() == ['default', 'large'])
 
 e = executable('package-test', 'src/main.rs',
   dependencies: [hello_rs.dependency(), answer_rs.dependency()],

test cases/rust/31 rust.workspace package/src/main.rs

@@ -1,6 +1,8 @@
-use hello::greet;
+use hello::{farewell, greet};
 
 fn main() {
     println!("{}", greet());
+    println!("{}", farewell());
     println!("{}", answer::answer());
+    println!("{}", answer::large_answer());
 }

test cases/rust/31 rust.workspace package/subprojects/answer-2.1/meson.build

@@ -4,6 +4,6 @@ rust = import('rust')
 cargo = rust.workspace()
 assert(cargo.packages() == ['answer'])
 
-l = static_library('answer', 'src/lib.rs')
+l = static_library('answer', 'src/lib.rs', rust_args: ['--cfg', 'feature="large"'])
 dep = declare_dependency(link_with: l)
 meson.override_dependency('answer-2-rs', dep)

test cases/rust/31 rust.workspace package/subprojects/hello-1.0/Cargo.toml

@@ -4,4 +4,7 @@ version = "1.0.0"
 edition = "2021"
 
 [lib]
-crate-type = ["lib"]
+crate-type = ["lib"]
+
+[features]
+goodbye = []

test cases/rust/31 rust.workspace package/subprojects/hello-1.0/src/lib.rs

@@ -2,3 +2,9 @@ pub fn greet() -> &'static str
 {
     "hello world"
 }
+
+#[cfg(feature = "goodbye")]
+pub fn farewell() -> &'static str
+{
+    "goodbye"
+}

test cases/rust/32 rust.workspace workspace/Cargo.toml

@@ -7,8 +7,10 @@ version = "0.1.0"
 edition = "2021"
 
 [features]
-default = ["dep:answer"]
+default = ["feature1", "hello?/goodbye"]
+feature1 = ["answer/large", "dep:hello"]
+feature2 = []
 
 [dependencies]
-hello = { version = "1.0", path = "subprojects/hello-1.0" }
+hello = { version = "1.0", path = "subprojects/hello-1.0", optional = true }
 answer = { version = "2.1", path = "subprojects/answer-2.1", optional = true }

test cases/rust/32 rust.workspace workspace/meson.build

@@ -7,7 +7,18 @@ cargo = rust.workspace()
 assert(cargo.packages() == ['answer', 'hello', 'workspace_test'])
 
 hello_rs = cargo.subproject('hello')
+assert(hello_rs.name() == 'hello')
+assert(hello_rs.version() == '1.0.0')
+assert(hello_rs.api() == '1')
+assert(hello_rs.all_features() == ['default', 'goodbye'])
+assert(hello_rs.features() == ['default', 'goodbye'])
+
 answer_rs = cargo.subproject('answer', '2')
+assert(answer_rs.name() == 'answer')
+assert(answer_rs.version() == '2.1.0')
+assert(answer_rs.api() == '2')
+assert(answer_rs.all_features() == ['default', 'large'])
+assert(answer_rs.features() == ['default', 'large'])
 
 e = executable('workspace-test', 'src/main.rs',
   dependencies: [hello_rs.dependency(), answer_rs.dependency()],