Detect presence of common SQLite Node packages and use them for backup instead of CLI

lib/index.js

@@ -325,9 +325,70 @@ class SQLiteBackup {
         }
     }
 
+    _getDatabaseDriver() {
+        var sqlite3 = null;
+        var sqliteType = "cli";
+        try {
+            sqlite3 = require('better-sqlite3');
+            sqliteType = "better-sqlite3";
+        } catch (ex) {
+            try {
+                sqlite3 = require("sqlite3");
+                sqliteType = "sqlite3";
+            } catch (ex) {
+                sqlite3 = null;
+                sqliteType = "cli";
+            }
+        }
+        return {type: sqliteType, driver: sqlite3};
+    }
+
     async _backupUsingBackupCommand(backupPath) {
-        const command = `sqlite3 "${this.databasePath}" ".backup '${backupPath}'"`;
+        const dbDriver = this._getDatabaseDriver();
-        await execAsync(command);
+
+        switch (dbDriver.type) {
+            case "cli":
+                const command = `sqlite3 "${this.databasePath}" ".backup '${backupPath}'"`;
+                await execAsync(command);
+                return;
+            case "better-sqlite3":
+                const db = dbDriver.driver(this.databasePath);
+                await db.backup(backupPath);
+                return;
+            case "sqlite3":
+                console.info("Using node-sqlite3");
+                await this._backupUsingSQLite3Package(dbDriver.driver, this.databasePath, backupPath);
+                return;
+        }
+    }
+
+    async _backupUsingSQLite3Package(driver, databasePath, backupPath) {
+        return new Promise((resolve, reject) => {
+            const db = new driver.Database(databasePath, driver.OPEN_READONLY, err => {
+                if (err)
+                    return reject(err);
+            });
+
+            const backup = db.backup(backupPath);
+
+            backup.step(-1, err => {
+                if (err) {
+                    backup.finish(() => {
+                        db.close();
+                        reject(err);
+                    });
+                    return;
+                }
+
+                backup.finish(err => {
+                    db.close();
+                    if (err)
+                        reject(err);
+                    else
+                        resolve();
+                });
+            });
+        });
     }
 
     async _backupUsingCopy(backupPath) {