#2018 able to sync now for mirrors

- Refactor code to use sync.UniqueQueue
- Closes #3509

conf/app.ini

@@ -17,8 +17,10 @@ ANSI_CHARSET =
 FORCE_PRIVATE = false
 ; Global maximum creation limit of repository per user, -1 means no limit
 MAX_CREATION_LIMIT = -1
-; Patch test queue length, make it as large as possible
-PULL_REQUEST_QUEUE_LENGTH = 10000
+; Mirror sync queue length, increase if mirror syncing starts hanging
+MIRROR_QUEUE_LENGTH = 1000
+; Patch test queue length, increase if pull request patch testing starts hanging
+PULL_REQUEST_QUEUE_LENGTH = 1000
 ; Preferred Licenses to place at the top of the List
 ; Name must match file name in conf/license or custom/conf/license
 PREFERRED_LICENSES = Apache License 2.0,MIT License
@@ -184,7 +186,7 @@ ENABLE_REVERSE_PROXY_AUTO_REGISTRATION = false
 ENABLE_CAPTCHA = true
 
 [webhook]
-; Hook task queue length
+; Hook task queue length, increase if webhook shooting starts hanging
 QUEUE_LENGTH = 1000
 ; Deliver timeout in seconds
 DELIVER_TIMEOUT = 5
@@ -389,7 +391,7 @@ GC = 60
 
 [mirror]
 ; Default interval in hours between each check
-DEFAULT_INTERVAL = 24
+DEFAULT_INTERVAL = 8
 
 [api]
 ; Max number of items will response in a page

conf/locale/locale_en-US.ini

@@ -370,6 +370,7 @@ mirror_prune_desc = Remove any remote-tracking references that no longer exist o
 mirror_interval = Mirror Interval (hour)
 mirror_address = Mirror Address
 mirror_address_desc = Please include necessary user credentials in the address.
+mirror_last_synced = Last Synced
 watchers = Watchers
 stargazers = Stargazers
 forks = Forks
@@ -631,6 +632,9 @@ settings.collaboration.undefined = Undefined
 settings.hooks = Webhooks
 settings.githooks = Git Hooks
 settings.basic_settings = Basic Settings
+settings.mirror_settings = Mirror Settings
+settings.sync_mirror = Sync Now
+settings.mirror_sync_in_progress = Mirror syncing is in progress, please refresh page in about a minute.
 settings.site = Official Site
 settings.update_settings = Update Settings
 settings.change_reponame_prompt = This change will affect how links relate to the repository.