spack stage: add missing --fresh and --reuse (#31626)

lib/spack/spack/cmd/stage.py

@@ -24,6 +24,7 @@ def setup_parser(subparser):
     subparser.add_argument(
         '-p', '--path', dest='path',
         help="path to stage package, does not add to spack tree")
+    arguments.add_concretizer_args(subparser)
 
 
 def stage(parser, args):

lib/spack/spack/test/cmd/stage.py

@@ -8,6 +8,7 @@
 
 import pytest
 
+import spack.config
 import spack.environment as ev
 import spack.repo
 from spack.main import SpackCommand
@@ -122,3 +123,13 @@ def fake_stage(pkg, mirror_only=False):
 
     # assert that all were staged
     assert len(expected) == 0
+
+
+@pytest.mark.disable_clean_stage_check
+def test_concretizer_arguments(mock_packages, mock_fetch):
+    """Make sure stage also has --reuse and --fresh flags."""
+    stage("--reuse", "trivial-install-test-package")
+    assert spack.config.get("concretizer:reuse", None) is True
+
+    stage("--fresh", "trivial-install-test-package")
+    assert spack.config.get("concretizer:reuse", None) is False