Grosse MàJ

P5B/ruby/mon_projet/vendor/plugins/mysql_tasks/README

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+= MysqlTasks
+
+Some rake tasks to automate common database tasks (create/destroy & backup/restore).
+
+== Components
+
+rake db:mysql:create           # Create database (using database.yml config)
+rake db:mysql:destroy          # Destroy database (using database.yml config)
+rake db:mysql:backup           # Dump schema and data to an SQL file (/db/backup_YYYY_MM_DD.sql)
+rake db:mysql:restore          # Load schema and data from an SQL file (/db/restore.sql)
+
+Specifying RAILS_ENV works if you want to perform operations on test or production databases.

P5B/ruby/mon_projet/vendor/plugins/mysql_tasks/tasks/mysql_tasks.rake

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+namespace :db do
+  namespace :mysql do
+    desc "Dump schema and data to an SQL file (/db/backup_YYYY_MM_DD.sql)"
+    task :backup => :environment do
+      current_date = Time.now.strftime("%Y_%m_%d")
+      archive = "#{RAILS_ROOT}/db/backup_#{current_date}.sql"
+      database, user, password = retrieve_db_info
+    
+      cmd = "/usr/bin/env mysqldump --opt --skip-add-locks -u#{user} "
+      puts cmd + "... [password filtered]"
+      cmd += " -p'#{password}' " unless password.nil?
+      cmd += " #{database} > #{archive}"
+      result = system(cmd)
+    end
+  
+    desc "Load schema and data from an SQL file (/db/restore.sql)"
+    task :restore => :environment do
+      archive = "#{RAILS_ROOT}/db/restore.sql"
+      database, user, password = retrieve_db_info
+    
+      cmd = "/usr/bin/env mysql -u #{user} #{database} < #{archive}"
+      puts cmd + "... [password filtered]"
+      cmd += " -p'#{password}'"
+      result = system(cmd)
+    end
+  
+    desc "Create database (using database.yml config)"
+    task :create => :environment do
+      database, user, password = retrieve_db_info
+    
+      sql = "CREATE DATABASE #{database};"
+      sql += "GRANT ALL PRIVILEGES ON #{database}.* TO #{user}@localhost IDENTIFIED BY '#{password}';"
+      mysql_execute(user, password, sql)
+    end
+
+    desc "Destroy database (using database.yml config)"
+    task :destroy => :environment do
+      database, user, password = retrieve_db_info
+      sql = "DROP DATABASE #{database};"
+      mysql_execute(user, password, sql)
+    end
+  end
+end
+
+  private
+  def retrieve_db_info
+    result = File.read "#{RAILS_ROOT}/config/database.yml"
+    result.strip!
+    config_file = YAML::load(ERB.new(result).result)
+    return [
+      config_file[RAILS_ENV]['database'],
+      config_file[RAILS_ENV]['username'],
+      config_file[RAILS_ENV]['password']
+    ]
+  end
+  
+  def mysql_execute(username, password, sql)
+    system("/usr/bin/env mysql -u #{username} -p'#{password}' --execute=\"#{sql}\"")
+  end