cd1e105d78
This fixes the case where directory is removed in aufs and then the same layer is imported to a different graphdriver. Currently when you do `rm -rf /foo && mkdir /foo` in a layer in aufs the files under `foo` would only be be hidden on aufs. The problems with this fix: 1) When a new diff is recreated from non-aufs driver the `opq` files would not be there. This should not mean layer differences for the user but still different content in the tar (one would have one `opq` file, the others would have `.wh.*` for every file inside that folder). This difference also only happens if the tar-split file isn’t stored for the layer. 2) New files that have the filenames before `.wh..wh..opq` when they are sorted do not get picked up by non-aufs graphdrivers. Fixing this would require a bigger refactoring that is planned in the future. Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com> Upstream-commit: 00e3277107a63218b656a36457caf380f9cabf37 Component: engine
pkg/ is a collection of utility packages used by the Docker project without being specific to its internals.
Utility packages are kept separate from the docker core codebase to keep it as small and concise as possible. If some utilities grow larger and their APIs stabilize, they may be moved to their own repository under the Docker organization, to facilitate re-use by other projects. However that is not the priority.
The directory pkg is named after the same directory in the camlistore project. Since Brad is a core
Go maintainer, we thought it made sense to copy his methods for organizing Go code :) Thanks Brad!
Because utility packages are small and neatly separated from the rest of the codebase, they are a good place to start for aspiring maintainers and contributors. Get in touch if you want to help maintain them!