[build, devscripts] Add devscript to set a build variant

Closes #4471

1 files changed, 36 insertions, 0 deletions

diff --git a/devscripts/set-variant.py b/devscripts/set-variant.py
new file mode 100644
index 000000000..10341e744
--- /dev/null
+++ b/devscripts/set-variant.py
@@ -0,0 +1,36 @@
+#!/usr/bin/env python3
+
+# Allow direct execution
+import os
+import sys
+
+sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+
+
+import argparse
+import functools
+import re
+
+from devscripts.utils import compose_functions, read_file, write_file
+
+VERSION_FILE = 'yt_dlp/version.py'
+
+
+def parse_options():
+    parser = argparse.ArgumentParser(description='Set the build variant of the package')
+    parser.add_argument('variant', help='Name of the variant')
+    parser.add_argument('-M', '--update-message', default=None, help='Message to show in -U')
+    return parser.parse_args()
+
+
+def property_setter(name, value):
+    return functools.partial(re.sub, rf'(?m)^{name}\s*=\s*.+$', f'{name} = {value!r}')
+
+
+opts = parse_options()
+transform = compose_functions(
+    property_setter('VARIANT', opts.variant),
+    property_setter('UPDATE_HINT', opts.update_message)
+)
+
+write_file(VERSION_FILE, transform(read_file(VERSION_FILE)))