try to fix travis build

.travis.yml

@@ -4,9 +4,6 @@ rvm:
 gemfile:
   - Gemfile
   - Gemfile.rails3.0
-before_script:
-  - "mysql -e 'create database will_paginate;'"
-  - "psql  -c 'create database will_paginate;' -U postgres"
 env:
   - DB=sqlite3
   - DB=mysql

Rakefile

@@ -3,7 +3,7 @@ begin
 rescue LoadError
   # no spec tasks
 else
-  task :default => :spec
+  task :default => [:create_database, :spec]
 
   desc 'Run ALL OF the specs'
   RSpec::Core::RakeTask.new(:spec) do |t|
@@ -19,6 +19,18 @@ else
   end
 end
 
+desc 'Create necessary databases'
+task :create_database do |variable|
+  case ENV['DB']
+  when 'mysql', 'mysql2'
+    `mysql -e 'create database will_paginate;'`
+    abort "failed to create mysql database" unless $?.success?
+  when 'postgres'
+    `psql -c 'create database will_paginate;' -U postgres`
+    abort "failed to create postgres database" unless $?.success?
+  end
+end
+
 desc 'Run specs against both Rails 3.1 and Rails 3.0'
 task :rails3 do |variable|
   system 'bundle exec rake spec && BUNDLE_GEMFILE=Gemfile.rails3.0 bundle exec rake spec:rails'