Fix for being able to 'spack load' packages that have been renamed. (#14348)

* Fix for being able to 'spack load' packages that have been renamed.

* tests: add test for 'spack load' of a installed, but renamed/deleted package

lib/spack/spack/modules/common.py

@@ -342,7 +342,11 @@ def get_module(module_type, spec, get_full_path, required=True):
         The module name or path. May return ``None`` if the module is not
         available.
     """
-    if spec.package.installed_upstream:
+    try:
+        upstream = spec.package.installed_upstream
+    except spack.repo.UnknownPackageError:
+        upstream, record = spack.store.db.query_by_spec_hash(spec.dag_hash())
+    if upstream:
         module = (spack.modules.common.upstream_module_index
                   .upstream_module(spec, module_type))
         if not module:

lib/spack/spack/test/modules/common.py

@@ -11,6 +11,7 @@
 import spack.spec
 import spack.modules.tcl
 from spack.modules.common import UpstreamModuleIndex
+from spack.spec import Spec
 
 import spack.error
 
@@ -183,3 +184,33 @@ def test_get_module_upstream():
         assert m1_path == '/path/to/a'
     finally:
         spack.modules.common.upstream_module_index = old_index
+
+
+def test_load_installed_package_not_in_repo(install_mockery, mock_fetch,
+                                            monkeypatch):
+    # Get a basic concrete spec for the trivial install package.
+    spec = Spec('trivial-install-test-package')
+    spec.concretize()
+    assert spec.concrete
+
+    # Get the package
+    pkg = spec.package
+
+    def find_nothing(*args):
+        raise spack.repo.UnknownPackageError(
+            'Repo package access is disabled for test')
+
+    try:
+        pkg.do_install()
+
+        spec._package = None
+        monkeypatch.setattr(spack.repo, 'get', find_nothing)
+        with pytest.raises(spack.repo.UnknownPackageError):
+            spec.package
+
+        module_path = spack.modules.common.get_module('tcl', spec, True)
+        assert module_path
+        pkg.do_uninstall()
+    except Exception:
+        pkg.remove_prefix()
+        raise