Initial commit

news/5073.bugfix.rst

@@ -0,0 +1 @@
+Return error when trying to uninstall package that exist but not uninstallable.

src/pip/_internal/commands/uninstall.py

@@ -7,7 +7,7 @@ from pip._vendor.packaging.utils import canonicalize_name
 from pip._internal.cli import cmdoptions
 from pip._internal.cli.base_command import Command
 from pip._internal.cli.req_command import SessionCommandMixin, warn_if_run_as_root
-from pip._internal.cli.status_codes import SUCCESS
+from pip._internal.cli.status_codes import ERROR, SUCCESS
 from pip._internal.exceptions import InstallationError
 from pip._internal.req import parse_requirements
 from pip._internal.req.constructors import (
@@ -94,6 +94,7 @@ class UninstallCommand(Command, SessionCommandMixin):
             modifying_pip="pip" in reqs_to_uninstall
         )
 
+        everything_okay = True
         for req in reqs_to_uninstall.values():
             uninstall_pathset = req.uninstall(
                 auto_confirm=options.yes,
@@ -101,6 +102,11 @@ class UninstallCommand(Command, SessionCommandMixin):
             )
             if uninstall_pathset:
                 uninstall_pathset.commit()
+            else:
+                everything_okay = False
         if options.root_user_action == "warn":
             warn_if_run_as_root()
-        return SUCCESS
+        if everything_okay:
+            return SUCCESS
+        else:
+            return ERROR