tango.io.vfs.LinkedFolder

License:

BSD style: see license.txt

Version:

Oct 2007: Initial version

Author:

Kris
class LinkedFolder : VirtualFolder
LinkedFolder is derived from VirtualFolder, and behaves exactly the same in all but one aspect: it treats mounted folders as an ordered list of alternatives to look for a file. This supports the notion of file 'overrides', whereby "customized" files can be inserted into a chain of alternatives.
(overridden folders are not currently supported)
this(const(char)[] name)
All folder must have a name. No '.' or '/' chars are permitted
VfsHost mount(VfsFolder folder, const(char)[] name = null) [override, final]
Add a child folder. The child cannot 'overlap' with others in the tree of the same type. Circular references across a tree of virtual folders are detected and trapped.
We add the new child at the end of an ordered list, which we subsequently traverse when looking up a file

The second argument represents an optional name that the mount should be known as, instead of the name exposed by the provided folder (it is not an alias).
VfsHost dismount(VfsFolder folder) [override, final]

TODO:

unhook a child folder.
VfsFile file(const(char)[] path) [@property, override, final]
Return a file representation of the given path. If the path-head does not refer to an immediate child folder, and does not match a symbolic link, it is considered to be unknown.
We scan the set of mounted folders, in the order mounted, looking for a match. Where one is found, we test to see that it really exists before returning the reference