add command line option for setting path to bot database

Let people have executables in one place and stuff that changes in another
place. Because containers.

bin/linkbot

@@ -19,7 +19,8 @@ at_exit {
 options = {
   :console => false,
   :dev => false,
-  :config_path => File.expand_path(File.join(File.dirname(__FILE__), "..", "config", "config.json"))
+  :config_path => File.expand_path(File.join(File.dirname(__FILE__), "..", "config", "config.json")),
+  :database_path => File.expand_path(File.join(File.dirname(__FILE__), "..", "data.sqlite3")),
 }
 
 OptionParser.new do |opts|
@@ -29,6 +30,10 @@ OptionParser.new do |opts|
     options[:config_path] = v
   end
 
+  opts.on("-D", "--database FILE", "Use the SQLite database at this file path") do |v|
+    options[:database_path] = v
+  end
+
   opts.on("-k", "--console", "Run a local chat console for testing plugins") do |v|
     options[:console] = v
   end

lib/linkbot.rb

@@ -17,6 +17,7 @@ class Bot
 
     def initialize(options)
       Linkbot::Config.load(options[:config_path])
+      Linkbot.db(options[:database_path])
 
       if options[:console]
         Linkbot::Config["connectors"] = [{ "type" => "console", "periodic" => true, "receive_broadcasts" => true}]

lib/linkbot/db.rb

@@ -2,12 +2,12 @@
 require 'sqlite3'
 
 module Linkbot
-  def self.db
-    @@db ||= SQLite3::Database.new('data.sqlite3')
+  def self.db(database_path = 'data.sqlite3')
+    @@db ||= SQLite3::Database.new(database_path)
     @@db.type_translation = true
     @@db.busy_timeout(1000)
   end
-  
+
   def self.load_users
     if Linkbot.db.table_info('users').empty?
       Linkbot.db.execute('CREATE TABLE users (user_id STRING, username TEXT, showname TEXT)');
@@ -16,15 +16,15 @@ def self.load_users
     @@user_ids = Hash[rows]
     @@users = Hash[rows.collect {|a,b| [b,a]}]
   end
-  
+
   def self.users
     @@users
   end
-  
+
   def self.user_ids
     @@user_ids
   end
-  
+
   def self.user_exists?(user)
     rows = Linkbot.db.execute("select * from users where username = ?", user)
     if rows.empty?
@@ -34,20 +34,20 @@ def self.user_exists?(user)
       true
     end
   end
-  
+
   def self.username(user_id)
     Linkbot.db.execute("select username from users where user_id = ?", user_id)[0][0]
   end
-  
+
   def self.user_id(username)
     Linkbot.db.execute("select user_id from users where username = ?", username)[0][0]
   end
-  
+
   # Update a username based on the user_id
-  def self.update_user(username,user_id) 
+  def self.update_user(username,user_id)
     Linkbot.db.execute("update users set username = ? where user_id = ?", username, user_id)
   end
-  
+
   def self.add_user(username,user_id=nil)
     rows = Linkbot.db.execute("select * from users where username = ?", username)
     if rows.empty?
@@ -63,6 +63,6 @@ def self.add_user(username,user_id=nil)
       Linkbot.db.execute("update users set user_id=? where username=?", user_id, username)
     end
   end
-  
+
 
 end