Add private property to project properties blocks publishing without -r

docs/docs/pyproject.md

@@ -269,6 +269,14 @@ any custom url in the `urls` section.
 
 If you publish you package on PyPI, they will appear in the `Project Links` section.
 
+
+## private
+
+Setting this to `true` marks the project as private. This will prevent using
+public PYPI repository by default when running `poetry publish`.
+Publishing will require using `-r` option for projects mark as private.
+
+
 ## Poetry and PEP-517
 
 [PEP-517](https://www.python.org/dev/peps/pep-0517/) introduces a standard way

poetry/json/schemas/poetry-schema.json

@@ -173,6 +173,10 @@
                     "description": "The full url of the custom url."
                 }
             }
+        },
+        "private": {
+            "type": "boolean",
+            "description": "Mark as private. Turn off the default publish behavior."
         }
     },
     "definitions": {

poetry/publishing/publisher.py

@@ -38,7 +38,17 @@ def publish(
         client_cert=None,
         dry_run=False,
     ):  # type: (Optional[str], Optional[str], Optional[str], Optional[Path], Optional[Path], Optional[bool]) -> None
-        if not repository_name:
+        if not repository_name and self._package.private:
+            self._io.write_line(
+                "<warning>This project can't be published using default repository "
+                "as it is marked as a <b>private</> package.\n"
+                "You probably don't want to publish it to default pypi "
+                "repository.</>\n\n"
+                "Please use <c1>`poetry publish -r <repository_name>`</> "
+                "to publish this package"
+            )
+            return
+        elif not repository_name:
             url = "https://upload.pypi.org/legacy/"
             repository_name = "pypi"
         else:

tests/console/commands/test_publish.py

@@ -107,3 +107,15 @@ def test_publish_dry_run(app_tester, http):
     assert "Publishing simple-project (1.2.3) to PyPI" in output
     assert "- Uploading simple-project-1.2.3.tar.gz" in error
     assert "- Uploading simple_project-1.2.3-py2.py3-none-any.whl" in error
+
+
+def test_publish_with_private_property(app, app_tester, http):
+    app.poetry.package.private = True
+    app_tester.execute("publish")
+
+    expected = (
+        "This project can't be published using default repository as it is "
+        "marked as a private package."
+    )
+
+    assert expected in app_tester.io.fetch_output()