feat: Add backup task for backing up the remote database.

Author: lanzhiheng

README.md

@@ -76,6 +76,7 @@ assets:remote:sync  || assets:push  # Synchronize your remote assets using local
 
 db:local:sync       || db:pull      # Synchronize your local database using remote database data
 db:remote:sync      || db:push      # Synchronize your remote database using local database data
+db:remote:backup    || db:backup    # Backup the remote database and download it
 ```
 
 ## Example

lib/capistrano-db-tasks/database.rb

@@ -215,7 +215,7 @@ def postgresql_db_valid?(local_db, remote_db)
         (remote_db.nil? || (remote_db && remote_db.postgresql?))
     end
 
-    def remote_to_local(instance)
+    def remote_to_local(instance, sync=true)
       local_db  = Database::Local.new(instance)
       remote_db = Database::Remote.new(instance)
 
@@ -226,7 +226,7 @@ def remote_to_local(instance)
       ensure
         remote_db.clean_dump_if_needed
       end
-      local_db.load(remote_db.output_file, instance.fetch(:db_local_clean))
+      local_db.load(remote_db.output_file, instance.fetch(:db_local_clean)) if sync
     end
 
     def local_to_remote(instance)

lib/capistrano-db-tasks/dbtasks.rb

@@ -31,6 +31,16 @@
         end
       end
     end
+
+    desc 'Backup the remote database data and download it'
+    task :backup do
+      on roles(:db) do
+        if fetch(:skip_data_sync_confirm) || Util.prompt('Are you sure you want to erase your local database with server database')
+          puts "Downloading your backup file for remote database..."
+          Database.remote_to_local(self, false)
+        end
+      end
+    end
   end
 
   namespace :local do
@@ -66,6 +76,9 @@
     end
   end
 
+  desc 'Backup the remote database and download it'
+  task :backup => "db:remote:backup"
+
   desc 'Synchronize your local database using remote database data'
   task :pull => "db:local:sync"