Deprecate --skip-requirements-regex

news/7297.removal

@@ -0,0 +1 @@
+Deprecate undocumented ``--skip-requirements-regex`` option.

src/pip/_internal/cli/base_command.py

@@ -131,6 +131,17 @@ class Command(CommandContextMixIn):
                 ) + message
             deprecated(message, replacement=None, gone_in=None)
 
+        if options.skip_requirements_regex:
+            deprecated(
+                "--skip-requirements-regex is unsupported and will be removed",
+                replacement=(
+                    "manage requirements/constraints files explicitly, "
+                    "possibly generating them from metadata"
+                ),
+                gone_in="20.1",
+                issue=7297,
+            )
+
         # TODO: Try to get these passing down from the command?
         #       without resorting to os.environ to hold these.
         #       This also affects isolated builds and it should.