Add helpful error message for incorrect PyPI URL

tests/test_upload.py

@@ -285,3 +285,20 @@ def none_upload(*args, **settings_kwargs):
     assert "pypipassword" == upload_settings.password
     assert "pypiuser" == upload_settings.username
     assert "/foo/bar.crt" == upload_settings.cacert
+
+
+@pytest.mark.parametrize('repo_url', [
+    "https://upload.pypi.org/",
+    "https://test.pypi.org/",
+    "https://pypi.org/"
+])
+def test_check_status_code_for_wrong_repo_url(repo_url, make_settings):
+    upload_settings = make_settings()
+
+    # override defaults to use incorrect URL
+    upload_settings.repository_config['repository'] = repo_url
+
+    with pytest.raises(twine.exceptions.InvalidPyPIUploadURL):
+        upload.upload(upload_settings, [
+            WHEEL_FIXTURE, SDIST_FIXTURE, NEW_SDIST_FIXTURE, NEW_WHEEL_FIXTURE
+        ])

tests/test_utils.py

@@ -16,8 +16,9 @@
 import textwrap
 
 import pytest
+import pretend
 
-from twine import utils
+from twine import utils, exceptions
 
 import helpers
 
@@ -389,3 +390,18 @@ def t(foo=False):
         t(1)
 
     assert t(foo=True)
+
+
+@pytest.mark.parametrize('repo_url', [
+    "https://pypi.python.org",
+    "https://testpypi.python.org"
+])
+def test_check_status_code_for_deprecated_pypi_url(repo_url):
+    response = pretend.stub(
+        status_code=410,
+        url=repo_url
+    )
+
+    # value of Verbose doesn't matter for this check
+    with pytest.raises(exceptions.UploadToDeprecatedPyPIDetected):
+        utils.check_status_code(response, False)

twine/exceptions.py

@@ -101,3 +101,12 @@ class InvalidDistribution(TwineException):
     """Raised when a distribution is invalid."""
 
     pass
+
+
+class InvalidPyPIUploadURL(TwineException):
+    """Repository configuration tries to use PyPI with an incorrect URL.
+
+    For example, https://pypi.org instead of https://upload.pypi.org/legacy.
+    """
+
+    pass

twine/utils.py

@@ -22,7 +22,7 @@
 import configparser
 from urllib.parse import urlparse, urlunparse
 
-from requests.exceptions import HTTPError
+import requests
 
 try:
     import keyring  # noqa
@@ -130,24 +130,31 @@ def normalize_repository_url(url):
 
 
 def check_status_code(response, verbose):
+    """Generate a helpful message based on the response from the repository.
+
+    Raise a custom exception for recognized errors. Otherwise, print the
+    response content (based on the verbose option) before re-raising the
+    HTTPError.
     """
-    Shouldn't happen, thanks to the UploadToDeprecatedPyPIDetected
-    exception, but this is in case that breaks and it does.
-    """
-    if (response.status_code == 410 and
-            response.url.startswith(("https://pypi.python.org",
-                                     "https://testpypi.python.org"))):
-        print("It appears you're uploading to pypi.python.org (or "
-              "testpypi.python.org). You've received a 410 error response. "
-              "Uploading to those sites is deprecated. The new sites are "
-              "pypi.org and test.pypi.org. Try using "
-              "https://upload.pypi.org/legacy/ "
-              "(or https://test.pypi.org/legacy/) to upload your packages "
-              "instead. These are the default URLs for Twine now. More at "
-              "https://packaging.python.org/guides/migrating-to-pypi-org/ ")
+    if response.status_code == 410 and "pypi.python.org" in response.url:
+        raise exceptions.UploadToDeprecatedPyPIDetected(
+            f"It appears you're uploading to pypi.python.org (or "
+            f"testpypi.python.org). You've received a 410 error response. "
+            f"Uploading to those sites is deprecated. The new sites are "
+            f"pypi.org and test.pypi.org. Try using {DEFAULT_REPOSITORY} (or "
+            f"{TEST_REPOSITORY}) to upload your packages instead. These are "
+            f"the default URLs for Twine now. More at "
+            f"https://packaging.python.org/guides/migrating-to-pypi-org/.")
+    elif response.status_code == 405 and "pypi.org" in response.url:
+        raise exceptions.InvalidPyPIUploadURL(
+            f"It appears you're trying to upload to pypi.org but have an "
+            f"invalid URL. You probably want one of these two URLs: "
+            f"{DEFAULT_REPOSITORY} or {TEST_REPOSITORY}. Check your "
+            f"--repository-url value.")
+
     try:
         response.raise_for_status()
-    except HTTPError as err:
+    except requests.HTTPError as err:
         if response.text:
             if verbose:
                 print('Content received from server:\n{}'.format(