Add support for uniffi library mode

.cirrus.yml

@@ -45,7 +45,7 @@ macos_arm64_task:
       - cat Cargo.lock
   install_script:
     - brew install python3
-    - python3 -m pip install uniffi-bindgen==0.24.1
+    - python3 -m pip install uniffi-bindgen==0.25.0
   <<: *BUILD_AND_TEST
 
 linux_aarch64_task:
@@ -62,5 +62,5 @@ linux_aarch64_task:
       - echo $CIRRUS_OS
       - cat Cargo.lock
   install_script:
-    - python3 -m pip install uniffi-bindgen==0.24.1
+    - python3 -m pip install uniffi-bindgen==0.25.0
   <<: *BUILD_AND_TEST

.github/workflows/test.yml

@@ -119,7 +119,7 @@ jobs:
         if: ${{ !contains(matrix.python-version, 'pypy') }}
         run: pip install cffi
       - name: Install python packages
-        run: pip install virtualenv ziglang~=0.10.0 twine uniffi-bindgen==0.24.1
+        run: pip install virtualenv ziglang~=0.10.0 twine uniffi-bindgen==0.25.0
       - uses: dtolnay/rust-toolchain@stable
         id: rustup
         with:

src/module_writer.rs

@@ -921,13 +921,6 @@ fn generate_uniffi_bindings(
         false
     };
 
-    // Disallow library mode without UDL files for now
-    // Should be removed in https://github.com/PyO3/maturin/pull/1729
-    // once uniffi release a new version
-    if is_library {
-        bail!("No UDL files found in {}", crate_dir.join("src").display());
-    }
-
     let mut cmd = uniffi_bindgen_command(crate_dir)?;
     cmd.current_dir(crate_dir);
     cmd.args([

src/templates/Cargo.toml.j2

@@ -16,8 +16,8 @@ pyo3 = "0.19.0"
 {% elif bindings == "rust-cpython" -%}
 cpython = "0.7.1"
 {% elif bindings == "uniffi" -%}
-uniffi = "0.24.1"
+uniffi = "0.25.0"
 
 [build-dependencies]
-uniffi = { version = "0.24.1", features = ["build"] }
+uniffi = { version = "0.25.0", features = ["build"] }
 {% endif -%}