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backend/apply_migration_003.py

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+#!/usr/bin/env python3
+"""
+Apply SQL migration 003 to existing database
+Migration 003: Add cpu_score_single and cpu_score_multi columns to benchmarks table
+Usage: python apply_migration_003.py
+"""
+
+import os
+import sqlite3
+from typing import Dict, List, Tuple
+
+# Database path
+DB_PATH = os.path.join(os.path.dirname(__file__), "data", "data.db")
+MIGRATION_PATH = os.path.join(
+    os.path.dirname(__file__), "migrations", "003_add_cpu_scores.sql"
+)
+
+# (column_name, human description)
+COLUMNS_TO_ADD: List[Tuple[str, str]] = [
+    ("cpu_score_single", "Score CPU monocœur"),
+    ("cpu_score_multi", "Score CPU multicœur"),
+]
+
+
+def _load_statements() -> Dict[str, str]:
+    """Load SQL statements mapped by column name from the migration file."""
+    with open(MIGRATION_PATH, "r", encoding="utf-8") as f:
+        raw_sql = f.read()
+
+    # Remove comments and blank lines for easier parsing
+    filtered_lines = []
+    for line in raw_sql.splitlines():
+        stripped = line.strip()
+        if not stripped or stripped.startswith("--"):
+            continue
+        filtered_lines.append(line)
+
+    statements = {}
+    for statement in "\n".join(filtered_lines).split(";"):
+        stmt = statement.strip()
+        if not stmt:
+            continue
+        for column_name, _ in COLUMNS_TO_ADD:
+            if column_name in stmt:
+                statements[column_name] = stmt
+                break
+
+    return statements
+
+
+def apply_migration():
+    """Apply the SQL migration 003."""
+
+    if not os.path.exists(DB_PATH):
+        print(f"❌ Database not found at {DB_PATH}")
+        print("   The database will be created automatically on first run.")
+        return
+
+    if not os.path.exists(MIGRATION_PATH):
+        print(f"❌ Migration file not found at {MIGRATION_PATH}")
+        return
+
+    print(f"📂 Database: {DB_PATH}")
+    print(f"📄 Migration: {MIGRATION_PATH}")
+    print()
+
+    conn = sqlite3.connect(DB_PATH)
+    cursor = conn.cursor()
+
+    try:
+        cursor.execute("PRAGMA table_info(benchmarks)")
+        existing_columns = {row[1] for row in cursor.fetchall()}
+
+        missing_columns = [
+            col for col, _ in COLUMNS_TO_ADD if col not in existing_columns
+        ]
+        if not missing_columns:
+            print("⚠️  Migration 003 already applied (CPU score columns exist)")
+            print("✅ Database is up to date")
+            return
+
+        statements = _load_statements()
+
+        print("🔄 Applying migration 003...")
+        for column_name, description in COLUMNS_TO_ADD:
+            if column_name not in missing_columns:
+                print(f"⏩ Column {column_name} already present, skipping")
+                continue
+
+            statement = statements.get(column_name)
+            if not statement:
+                raise RuntimeError(
+                    f"No SQL statement found for column '{column_name}' in migration file"
+                )
+
+            print(f"➕ Adding {description} ({column_name})...")
+            cursor.execute(statement)
+
+        conn.commit()
+
+        print("✅ Migration 003 applied successfully!")
+        print("New columns added to benchmarks table:")
+        for column_name, description in COLUMNS_TO_ADD:
+            if column_name in missing_columns:
+                print(f"  - {column_name}: {description}")
+
+    except (sqlite3.Error, RuntimeError) as e:
+        print(f"❌ Error applying migration: {e}")
+        conn.rollback()
+    finally:
+        conn.close()
+
+
+if __name__ == "__main__":
+    apply_migration()