Remove sqlite support

lib/perfectqueue/backend/rdb_compat.rb

@@ -37,13 +37,7 @@ def initialize(client, config)
         #password = config[:password]
         #user = config[:user]
 
-        case url.split('//',2)[0].to_s
-        when /sqlite/i
-          @db = Sequel.connect(url, :max_connections=>1)
-          # sqlite always locks tables on BEGIN
-          @table_lock = nil
-          @table_unlock = nil
-        when /mysql/i
+        if /\Amysql/i =~ url
           require 'uri'
 
           uri = URI.parse(url)
@@ -76,7 +70,7 @@ def initialize(client, config)
             @db.run("SELECT RELEASE_LOCK('#{@table}')")
           }
         else
-          raise ConfigError, "'sqlite' and 'mysql' are supported"
+          raise ConfigError, "only 'mysql' is supported"
         end
 
         @last_time = Time.now.to_i

perfectqueue.gemspec

@@ -21,6 +21,5 @@ Gem::Specification.new do |gem|
   gem.add_development_dependency "rake", "~> 0.9.2"
   gem.add_development_dependency "rspec", "~> 3.3.0"
   gem.add_development_dependency "simplecov", "~> 0.10.0"
-  gem.add_development_dependency "sqlite3", "~> 1.3.3"
   gem.add_development_dependency "mysql2", "~> 0.3.20"
 end

spec/rdb_compat_backend_spec.rb

@@ -76,7 +76,7 @@
   let (:now){ Time.now.to_i }
   let (:client){ double('client') }
   let (:table){ 'test_queues' }
-  let (:config){ {url: 'sqlite://spec/test.db', table: table} }
+  let (:config){ {url: 'mysql://root:@localhost/perfectqueue_test', table: table} }
   let (:db) do
     d = Backend::RDBCompatBackend.new(client, config)
     s = d.db
@@ -94,13 +94,7 @@
     it 'raises error unless table' do
       expect{Backend::RDBCompatBackend.new(client, {url: ''})}.to raise_error(ConfigError)
     end
-    it 'supports sqlite' do
-      config = {url: 'sqlite://localhost', table: table}
-      expect(Backend::RDBCompatBackend.new(client, config)).to be_an_instance_of(Backend::RDBCompatBackend)
-      expect(db.instance_variable_get(:@sql)).to include('max_running')
-    end
     it 'supports mysql' do
-      config = {url: 'mysql://root:@localhost/perfectqueue_test', table: table}
       expect(Backend::RDBCompatBackend.new(client, config)).to be_an_instance_of(Backend::RDBCompatBackend)
       expect(db.instance_variable_get(:@sql)).to include('max_running')
     end