DEVX-38: fix: clean dist/ before build and add workflow_dispatch to publish

tests/unit/test_publish.py

@@ -1,5 +1,6 @@
 """Unit tests for devx.ci.publish."""
 
+from pathlib import Path
 from unittest.mock import MagicMock, patch
 
 import click
@@ -64,7 +65,8 @@ class TestGenerateReleaseNotes:
 
 class TestBuildPackage:
     @patch("devx.ci.publish.subprocess.run")
-    def test_success(self, mock_run: MagicMock) -> None:
+    @patch("devx.ci.publish.Path.exists", return_value=False)
+    def test_success(self, mock_exists: MagicMock, mock_run: MagicMock) -> None:
         mock_run.return_value = MagicMock(returncode=0, stderr="")
         build_package()
         args, _ = mock_run.call_args
@@ -72,12 +74,23 @@ class TestBuildPackage:
         assert args[0][2] == "build"
 
     @patch("devx.ci.publish.subprocess.run")
-    def test_failure_raises(self, mock_run: MagicMock) -> None:
+    @patch("devx.ci.publish.Path.exists", return_value=False)
+    def test_failure_raises(self, mock_exists: MagicMock, mock_run: MagicMock) -> None:
         mock_run.return_value = MagicMock(returncode=1, stderr="build error")
         with pytest.raises(click.ClickException) as exc:
             build_package()
         assert "build" in str(exc.value)
 
+    @patch("devx.ci.publish.subprocess.run")
+    @patch("devx.ci.publish.shutil.rmtree")
+    @patch("devx.ci.publish.Path.exists", return_value=True)
+    def test_cleans_dist_before_build(
+        self, mock_exists: MagicMock, mock_rmtree: MagicMock, mock_run: MagicMock
+    ) -> None:
+        mock_run.return_value = MagicMock(returncode=0, stderr="")
+        build_package()
+        mock_rmtree.assert_called_once_with(Path("dist"))
+
 
 class TestPublishToPypi:
     @patch("devx.ci.publish.subprocess.run")