Replace sharding methods in new directory sharding

Since this patch presents the implementation of support of
DDL sharding function, the number of files associated with
sharding will increase in the `common` folder. Therefore,
a separate directory was created for files containing
methods for working with sharding.

Part of #237

Author: AnaNek

crud/common/sharding.lua renamed to crud/common/sharding/sharding.lua

@@ -4,7 +4,7 @@ local vshard = require('vshard')
 
 local call = require('crud.common.call')
 local utils = require('crud.common.utils')
-local sharding = require('crud.common.sharding')
+local sharding = require('crud.common.sharding.sharding')
 local sharding_key_module = require('crud.common.sharding_key')
 local dev_checks = require('crud.common.dev_checks')
 local schema = require('crud.common.schema')

crud/common/sharding_key.lua renamed to crud/common/sharding/sharding_key.lua

@@ -4,7 +4,7 @@ local vshard = require('vshard')
 
 local call = require('crud.common.call')
 local utils = require('crud.common.utils')
-local sharding = require('crud.common.sharding')
+local sharding = require('crud.common.sharding.sharding')
 local sharding_key_module = require('crud.common.sharding_key')
 local dev_checks = require('crud.common.dev_checks')
 local schema = require('crud.common.schema')

crud/common/sharding_key_cache.lua renamed to crud/common/sharding/sharding_key_cache.lua

@@ -4,7 +4,7 @@ local vshard = require('vshard')
 
 local call = require('crud.common.call')
 local utils = require('crud.common.utils')
-local sharding = require('crud.common.sharding')
+local sharding = require('crud.common.sharding.sharding')
 local dev_checks = require('crud.common.dev_checks')
 local schema = require('crud.common.schema')
 

crud/delete.lua

@@ -4,7 +4,7 @@ local vshard = require('vshard')
 
 local call = require('crud.common.call')
 local utils = require('crud.common.utils')
-local sharding = require('crud.common.sharding')
+local sharding = require('crud.common.sharding.sharding')
 local dev_checks = require('crud.common.dev_checks')
 local schema = require('crud.common.schema')
 

crud/get.lua

@@ -3,7 +3,7 @@ local errors = require('errors')
 local vshard = require('vshard')
 
 local utils = require('crud.common.utils')
-local sharding = require('crud.common.sharding')
+local sharding = require('crud.common.sharding.sharding')
 local dev_checks = require('crud.common.dev_checks')
 local common = require('crud.select.compat.common')
 local schema = require('crud.common.schema')

crud/insert.lua

@@ -5,7 +5,7 @@ local fun = require('fun')
 
 local call = require('crud.common.call')
 local utils = require('crud.common.utils')
-local sharding = require('crud.common.sharding')
+local sharding = require('crud.common.sharding.sharding')
 local dev_checks = require('crud.common.dev_checks')
 local schema = require('crud.common.schema')
 local sharding_key_module = require('crud.common.sharding_key')

crud/replace.lua

@@ -4,7 +4,7 @@ local vshard = require('vshard')
 
 local call = require('crud.common.call')
 local utils = require('crud.common.utils')
-local sharding = require('crud.common.sharding')
+local sharding = require('crud.common.sharding.sharding')
 local sharding_key_module = require('crud.common.sharding_key')
 local dev_checks = require('crud.common.dev_checks')
 local schema = require('crud.common.schema')

crud/select/compat/select.lua

@@ -4,7 +4,7 @@ local vshard = require('vshard')
 
 local call = require('crud.common.call')
 local utils = require('crud.common.utils')
-local sharding = require('crud.common.sharding')
+local sharding = require('crud.common.sharding.sharding')
 local dev_checks = require('crud.common.dev_checks')
 local schema = require('crud.common.schema')