DEVX-59: fix: make repo arg optional in publish CLI, auto-detect from GITHUB_REPOSITORY

tests/unit/test_publish.py

@@ -475,6 +475,22 @@ class TestFromTag:
         assert result.exit_code == 0
         assert "No tag found" in result.output
 
+    @patch("devx.ci.publish.get_latest_tag", return_value=None)
+    def test_from_tag_no_repo_uses_env(self, _mock: MagicMock) -> None:
+        runner = CliRunner()
+        with patch.dict("os.environ", {"GITHUB_REPOSITORY": "owner/repo"}):
+            result = runner.invoke(main, ["--from-tag", "--skip-build"])
+        assert result.exit_code == 0
+        assert "No tag found" in result.output
+
+    @patch("devx.ci.publish.get_latest_tag", return_value=None)
+    def test_from_tag_no_repo_no_env_raises(self, _mock: MagicMock) -> None:
+        runner = CliRunner()
+        with patch.dict("os.environ", {}, clear=True):
+            result = runner.invoke(main, ["--from-tag", "--skip-build"])
+        assert result.exit_code != 0
+        assert "REPO argument is required" in result.output
+
     @patch("devx.ci.publish.is_release_commit", return_value=False)
     @patch("devx.ci.publish.get_latest_tag", return_value="v1.0.0")
     def test_from_tag_not_release_commit_skips(self, _mock_tag: MagicMock, _mock_rel: MagicMock) -> None:
@@ -497,6 +513,20 @@ class TestFromTag:
         assert result.exit_code == 0
         assert "Publishing release v1.0.0" in result.output
 
+    @patch("devx.ci.publish.is_release_commit", return_value=True)
+    @patch("devx.ci.publish.get_latest_tag", return_value="v1.0.0")
+    def test_from_tag_publishes_no_repo_arg(self, _mock_tag: MagicMock, _mock_rel: MagicMock) -> None:
+        with patch.dict("os.environ", {"REPO_TOKEN": "fake", "GITHUB_REPOSITORY": "owner/repo"}):
+            with patch("devx.ci.publish.TeaCLI") as mock_tea_cls:
+                mock_tea = MagicMock()
+                mock_tea.list_releases.return_value = []
+                mock_tea_cls.return_value = mock_tea
+                with patch("devx.ci.publish.generate_release_notes", return_value="notes"):
+                    runner = CliRunner()
+                    result = runner.invoke(main, ["--from-tag", "--skip-build"])
+        assert result.exit_code == 0
+        assert "Publishing release v1.0.0" in result.output
+
     def test_no_tag_no_from_tag_raises(self) -> None:
         runner = CliRunner()
         result = runner.invoke(main, ["", "owner/repo", "--skip-build"])