Add --output CLI argument to export changelog to Markdown (#2019)

build_tools/logupdate.py

@@ -0,0 +1,35 @@
+import argparse
+import io
+import sys
+
+# CLI argument parsing
+parser = argparse.ArgumentParser(description="changelog from merged PRs")
+parser.add_argument(
+    "--output",
+    type=str,
+    default=None,
+    help="Path to export changelog as Markdown"
+)
+args = parser.parse_args()
+
+# Capture output
+buffer = io.StringIO()
+original_stdout = sys.stdout
+sys.stdout = buffer
+
+# Render changelog and contributors 
+render_changelog(pulls, assigned)
+render_contributors(pulls)
+
+# Restore stdout
+sys.stdout = original_stdout
+changelog_content = buffer.getvalue()
+
+# Write to file if requested 
+if args.output:
+    with open(args.output, "w", encoding="utf-8") as f:
+        f.write(changelog_content)
+    print(f"Changelog written to {args.output}")
+else:
+    # If no output file, just print to terminal
+    print(changelog_content)