Add strict to check command

docs/index.rst

@@ -163,13 +163,14 @@ PyPI.
 .. code-block:: console
 
     $ twine check -h
-    usage: twine check [-h] dist [dist ...]
+    usage: twine check [-h] [--strict] dist [dist ...]
 
     positional arguments:
       dist        The distribution files to check, usually dist/*
 
     optional arguments:
       -h, --help  show this help message and exit
+      --strict    Fail on warnings
 
 ``twine register``
 ^^^^^^^^^^^^^^^^^^

tests/test_check.py

@@ -118,7 +118,7 @@ def test_check_no_description(monkeypatch, capsys):
 
     # used to crash with `AttributeError`
     output_stream = io.StringIO()
-    check.check(["dist/*"], output_stream=output_stream)
+    assert not check.check(["dist/*"], output_stream=output_stream)
     assert output_stream.getvalue() == (
         "Checking dist/dist.tar.gz: PASSED, with warnings\n"
         "  warning: `long_description_content_type` missing. "
@@ -159,8 +159,34 @@ def test_check_failing_distribution(monkeypatch):
 
 def test_main(monkeypatch):
     check_result = pretend.stub()
-    check_stub = pretend.call_recorder(lambda a: check_result)
+    check_stub = pretend.call_recorder(lambda a, strict=False: check_result)
     monkeypatch.setattr(check, "check", check_stub)
 
     assert check.main(["dist/*"]) == check_result
-    assert check_stub.calls == [pretend.call(["dist/*"])]
+    assert check_stub.calls == [pretend.call(["dist/*"], strict=False)]
+
+
+def test_strict_fails_on_warnings(monkeypatch, capsys):
+    package = pretend.stub(
+        metadata_dictionary=lambda: {
+            "description": None,
+            "description_content_type": None,
+        }
+    )
+
+    monkeypatch.setattr(commands, "_find_dists", lambda a: ["dist/dist.tar.gz"])
+    monkeypatch.setattr(
+        package_file,
+        "PackageFile",
+        pretend.stub(from_filename=lambda *a, **kw: package),
+    )
+
+    # used to crash with `AttributeError`
+    output_stream = io.StringIO()
+    assert check.check(["dist/*"], output_stream=output_stream, strict=True)
+    assert output_stream.getvalue() == (
+        "Checking dist/dist.tar.gz: FAILED, due to warnings\n"
+        "  warning: `long_description_content_type` missing. "
+        "defaulting to `text/x-rst`.\n"
+        "  warning: `long_description` missing.\n"
+    )

twine/commands/check.py

@@ -101,7 +101,11 @@ def _check_file(
     return warnings, is_ok
 
 
-def check(dists: List[str], output_stream: IO[str] = sys.stdout) -> bool:
+def check(
+    dists: List[str],
+    output_stream: IO[str] = sys.stdout,
+    strict: bool = False,
+) -> bool:
     uploads = [i for i in commands._find_dists(dists) if not i.endswith(".asc")]
     if not uploads:  # Return early, if there are no files to check.
         output_stream.write("No files to check.\n")
@@ -126,7 +130,11 @@ def check(dists: List[str], output_stream: IO[str] = sys.stdout) -> bool:
             output_stream.write(textwrap.indent(error_text, "  "))
             output_stream.write(textwrap.indent(str(render_warning_stream), "    "))
         elif warnings:
-            output_stream.write("PASSED, with warnings\n")
+            if strict:
+                failure = True
+                output_stream.write("FAILED, due to warnings\n")
+            else:
+                output_stream.write("PASSED, with warnings\n")
         else:
             output_stream.write("PASSED\n")
 
@@ -145,8 +153,15 @@ def main(args: List[str]) -> bool:
         metavar="dist",
         help="The distribution files to check, usually dist/*",
     )
+    parser.add_argument(
+        "--strict",
+        action="store_true",
+        default=False,
+        required=False,
+        help="Fail on warnings",
+    )
 
     parsed_args = parser.parse_args(args)
 
     # Call the check function with the arguments from the command line
-    return check(parsed_args.dists)
+    return check(parsed_args.dists, strict=parsed_args.strict)