Add a deployer to extract the source of a package

conf/tarball_deployer.py

@@ -0,0 +1,36 @@
+# Toolchain builder for the Serene programming language
+#
+# Copyright (c) 2019-2023 Sameer Rahmani <lxsameer@gnu.org>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, version 2.
+#
+# This program 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 General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+import os
+from pathlib import Path
+from conan.tools.files import copy
+
+from conf.utils import copy_tree
+
+
+def deploy(graph, output_folder, **kwargs):
+    # Note the kwargs argument is mandatory to be robust against future changes.
+    for name, dep in graph.root.conanfile.dependencies.items():
+        if dep.folders is None:
+            raise RuntimeError(
+                f"Sources missing for {name} dependency.\n"
+                "This deployer needs the sources of every dependency present to work, either building from source, "
+                "or by using the 'tools.build:download_source' conf."
+            )
+
+        output = Path(output_folder) / str(dep.ref).split("@")[0]
+        print(f"Copying {dep.package_folder} to {output}")
+        copy_tree(dep.package_folder, output)