| package archive |
| |
| // Whiteouts are files with a special meaning for the layered filesystem. |
| // Docker uses AUFS whiteout files inside exported archives. In other |
| // filesystems these files are generated/handled on tar creation/extraction. |
| |
| // WhiteoutPrefix prefix means file is a whiteout. If this is followed by a |
| // filename this means that file has been removed from the base layer. |
| const WhiteoutPrefix = ".wh." |
| |
| // WhiteoutMetaPrefix prefix means whiteout has a special meaning and is not |
| // for removing an actual file. Normally these files are excluded from exported |
| // archives. |
| const WhiteoutMetaPrefix = WhiteoutPrefix + WhiteoutPrefix |
| |
| // WhiteoutLinkDir is a directory AUFS uses for storing hardlink links to other |
| // layers. Normally these should not go into exported archives and all changed |
| // hardlinks should be copied to the top layer. |
| const WhiteoutLinkDir = WhiteoutMetaPrefix + "plnk" |
| |
| // WhiteoutOpaqueDir file means directory has been made opaque - meaning |
| // readdir calls to this directory do not follow to lower layers. |
| const WhiteoutOpaqueDir = WhiteoutMetaPrefix + ".opq" |
