Update chess openings database

lib/src/db/openings_database.dart

@@ -9,13 +9,7 @@ import 'package:sqflite/sqflite.dart';
 part 'openings_database.g.dart';
 
 // The dataset is from https://github.com/lichess-org/chess-openings
-// and was simply imported in sqlite with:
-//   sqlite> .mode tabs
-//   sqlite> .import a.tsv openings
-//   sqlite> .import b.tsv openings
-//   sqlite> .import c.tsv openings
-//   sqlite> .import d.tsv openings
-//   sqlite> .import e.tsv openings
+// It can be updated by running the script at scripts/update_openings_db.py
 
 const _kDatabaseVersion = 2;
 const _kDatabaseName = 'chess_openings$_kDatabaseVersion.db';

scripts/update_openings_db.py

@@ -0,0 +1,35 @@
+#!/usr/bin/env python3
+
+import csv
+import os
+import sqlite3
+import subprocess
+import sys
+
+if len(sys.argv) <= 1:
+    print("Usage: ./update_openings_db.py <path to lichess-org/chess-openings repo>")
+    sys.exit(1)
+
+path_to_chess_openings = sys.argv[1]
+
+if not os.path.isdir(path_to_chess_openings):
+    print(f"Error: {path_to_chess_openings} is not a valid directory.")
+    sys.exit(1)
+
+subprocess.run(["make", "all"], cwd=path_to_chess_openings, check=True)
+
+db_path = os.path.join(os.path.dirname(__file__), '../assets/chess_openings.db')
+conn = sqlite3.connect(db_path)
+
+with open(os.path.join(path_to_chess_openings, 'dist/all.tsv'), 'r') as f:
+    dr = csv.DictReader(f, delimiter='\t')
+    to_db = [(i['eco'], i['name'], i['pgn'], i['uci'], i['epd']) for i in dr]
+
+    cur = conn.cursor()
+    cur.execute('DELETE FROM openings;')
+    conn.commit()
+
+    cur.executemany('INSERT INTO openings (eco, name, pgn, uci, epd) VALUES (?, ?, ?, ?, ?);', to_db)
+    conn.commit()
+
+conn.close()