Add ability to create a test data archive with make_source_archive

This makes it so that we ship the test data for every major release
in its own separate archive. (In case someone wants to easily run the
tests for a specific older release without using git)

Pull Request: https://projects.blender.org/blender/blender/pulls/135293

GNUmakefile

@@ -572,6 +572,8 @@ source_archive_complete: .FORCE
 	    -DCMAKE_BUILD_TYPE_INIT:STRING=$(BUILD_TYPE) -DPACKAGE_USE_UPSTREAM_SOURCES=OFF
 # This assumes CMake is still using a default `PACKAGE_DIR` variable:
 	@$(PYTHON) ./build_files/utils/make_source_archive.py --include-packages "$(BUILD_DIR)/source_archive/packages"
+# We assume that the tests will not change for minor releases so only package them for major versions
+	@$(PYTHON) ./build_files/utils/make_source_archive.py --package-test-data
 
 icons_geom: .FORCE
 	@BLENDER_BIN=$(BLENDER_BIN) \

build_files/utils/make_source_archive.py

@@ -51,7 +51,8 @@ def main() -> None:
         description="Create a tarball of the Blender sources, optionally including sources of dependencies.",
         epilog="This script is intended to be run by `make source_archive_complete`.",
     )
-    cli_parser.add_argument(
+    group = cli_parser.add_mutually_exclusive_group()
+    group.add_argument(
         "-p",
         "--include-packages",
         type=Path,
@@ -59,6 +60,12 @@ def main() -> None:
         metavar="PACKAGE_PATH",
         help="Include all source files from the given package directory as well.",
     )
+    group.add_argument(
+        "-t",
+        "--package-test-data",
+        action='store_true',
+        help="Package all test data into its own archive",
+    )
 
     cli_args = cli_parser.parse_args()
 
@@ -79,7 +86,12 @@ def main() -> None:
     manifest = manifest_path(tarball)
     packages_dir = packages_path(curdir, cli_args)
 
-    create_manifest(version, manifest, blender_srcdir, packages_dir)
+    if cli_args.package_test_data:
+        print("Creating an archive of all test data.")
+        create_manifest(version, manifest, blender_srcdir / "tests/data", packages_dir)
+    else:
+        create_manifest(version, manifest, blender_srcdir, packages_dir)
+
     create_tarball(version, tarball, manifest, blender_srcdir, packages_dir)
     create_checksum_file(tarball)
     cleanup(manifest)
@@ -90,6 +102,8 @@ def tarball_path(output_dir: Path, version: make_utils.BlenderVersion, cli_args:
     extra = ""
     if cli_args.include_packages:
         extra = "-with-libraries"
+    elif cli_args.package_test_data:
+        extra = "-test-data"
 
     return output_dir / f"blender{extra}-{version}.tar.xz"