Add dev/bump-version.py script

dev/bump-version.py

@@ -0,0 +1,43 @@
+import argparse
+import datetime
+import re
+from pathlib import Path
+
+
+def calculate_new_version_info(old_version_name: str) -> tuple[int, int, int]:
+    old_year, old_month, old_beta = [
+        int(x) for x in re.match(r"v?(\d+).(\d+)b(\d+)", old_version_name).groups()
+    ]
+    now = datetime.datetime.now(datetime.UTC)
+    new_year, new_month, new_beta = int(str(now.year)[2:]), now.month, 0
+    if (old_year, old_month) == (new_year, new_month):
+        new_beta = old_beta + 1
+    return new_year, new_month, new_beta
+
+
+def rewrite_version_file(year: int, month: int, beta: int) -> None:
+    path = Path(__file__).parent.parent / "supriya" / "_version.py"
+    text = path.read_text()
+    lines = text.splitlines()
+    for i, line in enumerate(lines):
+        if line.startswith("__version_info__ ="):
+            lines[i] = f'__version_info__ = ({year}, "{month}b{beta}")'
+    path.write_text("\n".join(lines))
+
+
+def build_parser():
+    parser = argparse.ArgumentParser()
+    parser.add_argument("release")
+    return parser
+
+
+def run():
+    parser = build_parser()
+    parsed_args = parser.parse_args()
+    year, month, beta = calculate_new_version_info(parsed_args.release)
+    rewrite_version_file(year, month, beta)
+    print(f"{year}.{month}b{beta}")
+
+
+if __name__ == "__main__":
+    run()