Dir scaffold

Gemfile

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+# frozen_string_literal: true
+
+source "https://rubygems.org"
+
+# gem "rails"
+
+gem "sequel", "~> 5.72"

Gemfile.lock

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+GEM
+  remote: https://rubygems.org/
+  specs:
+    bigdecimal (3.1.4)
+    sequel (5.72.0)
+      bigdecimal
+
+PLATFORMS
+  x86_64-linux
+
+DEPENDENCIES
+  sequel (~> 5.72)
+
+BUNDLED WITH
+   2.4.10

lib/database/migrations/001_create_users_and_xp_gain_tables.rb

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+# db/migrations/001_create_users_and_xp_gain_tables.rb
+Sequel.migration do
+  up do
+    create_table(:users) do
+      primary_key :id
+      String :user_id, unique: true
+      String :username
+      Integer :current_level
+      Integer :total_xp
+    end
+
+    create_table(:xp_gain) do
+      primary_key :id
+      String :commit_id
+      Integer :xp_gained
+      DateTime :time_of_gain
+      Integer :total_gains
+      foreign_key :user_id, :users
+    end
+  end
+
+  down do
+    drop_table(:xp_gain)
+    drop_table(:users)
+  end
+end

lib/database/repoquest_db_connector.rb

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+# lib/database/repoquest_db_connector.rb
+require 'sequel'
+
+class RepoQuestDBConnector
+  def initialize(db_file = 'sqlite://repoquest.db')
+    @db = Sequel.connect(db_file)
+  end
+
+  def run_migrations
+    Sequel.extension :migration
+    Sequel::Migrator.run(@db, 'db/migrations/')
+  end
+end