Commits on Sep 21, 2018

1. builder: use buildkit's GC for build cache …

   This allows users to configure the buildkit GC.
   
   The following enables the default GC:
   ```
   {
     "builder": {
       "gc": {
         "enabled": true
       }
     }
   }
   ```
   
   The default GC policy has a simple config:
   ```
   {
     "builder": {
       "gc": {
         "enabled": true,
         "defaultKeepStorage": "30GB"
       }
     }
   }
   ```
   
   A custom GC policy can be used instead by specifying a list of cache prune rules:
   ```
   {
     "builder": {
       "gc": {
         "enabled": true,
         "policy": [
           {"keepStorage": "512MB", "filter": ["unused-for=1400h"]]},
           {"keepStorage": "30GB", "all": true}
         ]
       }
     }
   }
   ```
   
   Signed-off-by: Tibor Vass <tibor@docker.com>

   Tibor Vass committed Sep 21, 2018
   Copy the full SHA

   4a776d0 View commit details

   Browse the repository at this point in the history