1 files changed, 88 insertions, 0 deletions
diff --git a/src/buildstream/_artifactproject.py b/src/buildstream/_artifactproject.py
new file mode 100644
index 000000000..b8153b06d
--- /dev/null
+++ b/src/buildstream/_artifactproject.py
@@ -0,0 +1,88 @@
+#
+#  Copyright (C) 2020 Codethink Limited
+#
+#  This program is free software; you can redistribute it and/or
+#  modify it under the terms of the GNU Lesser General Public
+#  License as published by the Free Software Foundation; either
+#  version 2 of the License, or (at your option) any later version.
+#
+#  This library is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the GNU
+#  Lesser General Public License for more details.
+#
+#  You should have received a copy of the GNU Lesser General Public
+#  License along with this library. If not, see <http://www.gnu.org/licenses/>.
+#
+#  Authors:
+#        Tristan Van Berkom <tristan.vanberkom@codethink.co.uk>
+#
+from contextlib import suppress
+from typing import TYPE_CHECKING
+
+from ._project import Project
+from ._context import Context
+from ._loader import Loader
+
+if TYPE_CHECKING:
+    from typing import Dict
+
+
+# ArtifactProject()
+#
+# A project instance to be used as the project for an ArtifactElement.
+#
+# This is basically a simplified Project implementation which ensures that
+# we do not accidentally infer any data from a possibly present local project
+# when processing an ArtifactElement.
+#
+# Args:
+#    project_name: The name of this project
+#
+class ArtifactProject(Project):
+
+    __loaded_artifact_projects = {}  # type: Dict[str, ArtifactProject]
+
+    def __init__(self, project_name: str, context: Context):
+
+        #
+        # Chain up to the Project constructor, and allow it to initialize
+        # without loading anything
+        #
+        super().__init__(None, context, search_for_project=False)
+
+        # Fill in some necessities
+        #
+        self.name = project_name
+        self.element_path = ""  # This needs to be set to avoid Loader crashes
+        self.loader = Loader(self)
+
+    # get_artifact_project():
+    #
+    # Gets a reference to an ArtifactProject for the given
+    # project name, possibly instantiating one if needed.
+    #
+    # Args:
+    #    project_name: The project name
+    #    context: The Context
+    #
+    # Returns:
+    #    An ArtifactProject with the given project_name
+    #
+    @classmethod
+    def get_artifact_project(cls, project_name: str, context: Context) -> "ArtifactProject":
+        with suppress(KeyError):
+            return cls.__loaded_artifact_projects[project_name]
+
+        project = cls(project_name, context)
+        cls.__loaded_artifact_projects[project_name] = project
+        return project
+
+    # clear_project_cache():
+    #
+    # Clears the cache of loaded projects, this can be called directly
+    # after completing a full load.
+    #
+    @classmethod
+    def clear_project_cache(cls):
+        cls.__loaded_artifact_projects = {}