cargo: convert proc_macro to crate_type in Library dataclass.

Do not look anymore at proc_macro after init, keeping crate_type as the
sole source of truth about the desired crate types.

1 files changed, 25 insertions, 0 deletions

diff --git a/unittests/cargotests.py b/unittests/cargotests.py
index 22d77b35f..e9e779c1e 100644
--- a/unittests/cargotests.py
+++ b/unittests/cargotests.py
@@ -280,6 +280,18 @@ class CargoTomlTest(unittest.TestCase):
         ]
     ''')
 
+    CARGO_TOML_3 = textwrap.dedent('''\
+        [package]
+        name = "bits"
+        edition = "2021"
+        rust-version = "1.70"
+        version = "0.1.0"
+
+        [lib]
+        proc-macro = true
+        crate-type = ["lib"] # ignored
+    ''')
+
     CARGO_TOML_WS = textwrap.dedent('''\
         [workspace]
         resolver = "2"
@@ -406,6 +418,19 @@ class CargoTomlTest(unittest.TestCase):
         self.assertEqual(manifest.dev_dependencies['gir-format-check'].meson_version, ['>= 0.1', '< 0.2'])
         self.assertEqual(manifest.dev_dependencies['gir-format-check'].api, '0.1')
 
+    def test_cargo_toml_proc_macro(self) -> None:
+        with tempfile.TemporaryDirectory() as tmpdir:
+            fname = os.path.join(tmpdir, 'Cargo.toml')
+            with open(fname, 'w', encoding='utf-8') as f:
+                f.write(self.CARGO_TOML_3)
+            manifest_toml = load_toml(fname)
+            manifest = Manifest.from_raw(manifest_toml, 'Cargo.toml')
+
+        self.assertEqual(manifest.lib.name, 'bits')
+        self.assertEqual(manifest.lib.crate_type, ['proc-macro'])
+        self.assertEqual(manifest.lib.path, 'src/lib.rs')
+        self.assertEqual(manifest.lib.proc_macro, True)
+
     def test_cargo_toml_targets(self) -> None:
         with tempfile.TemporaryDirectory() as tmpdir:
             fname = os.path.join(tmpdir, 'Cargo.toml')