storage.pl -- Store files on behalve of web clients

The file store needs to deal with versioning and meta-data. This is achieved using gitty.pl, a git-like content-base store that lacks git's notion of a tree. I.e., all files are considered individual and have their own version.

 storage_file(?File) is nondet

 storage_file_extension(?File, ?Extension) is nondet

 storage_file_extension_head(?File, ?Extension, -Head) is nondet

 storage_file(+File, -Data, -Meta) is semidet

 storage_meta_data(+File, -Meta) is semidet

True if File is known in the store.

Arguments:

Data	- is a string holding the content of the file
Meta	- is a dict holding the meta data about the file.

 storage_commit(+Hash, -Meta) is semidet

Load the commit data for Hash. This version does not tell us whether Hash is the HEAD or not.

 storage_meta_property(+Meta, -Property)

True when Meta has Property. Defined properties are:

peer(Atom)

Peer address that last saved the file -

 storage_store_term(+Term, -Hash) is det

 storage_load_term(+Hash, -Term) is det

Add/retrieve terms from the gitty store. This is used to create permanent links to arbitrary objects.

 use_gitty_file(+File) is det

 use_gitty_file(+File, +Options) is det

Load a file from the Gitty store. Options are passed to load_files/2. Additional options are:

watch(+Boolean)

If true (default), reload the file if the user saves it.

 storage_fsck

Enumerate and check the consistency of the entire store.

 storage_repack is det

 storage_repack(+Options) is det

Repack the storage directory. Currently only supports the files driver. For database drivers this is supposed to be handled by the database.

 storage_unpack

Unpack all packed objects of the store. Currently only supports the files driver. For database drivers this is supposed to be handled by the database.

 swish_search:typeahead(+Set, +Query, -Match, +Options) is nondet[multifile]

Find files using typeahead from the SWISH search box. This version defines the following sets:

• file: Search the store for matching file names, matching tag or title.
• store_content: Search the content of the store for matching lines.

To be done

- caching?

- We should only demand public on public servers.

Re-exported predicates

The following predicates are exported from this file while their implementation is defined in imported modules or non-module files loaded by this module.

 storage_file(?File) is nondet

 storage_file_extension(?File, ?Extension) is nondet

 storage_file_extension_head(?File, ?Extension, -Head) is nondet

 storage_file(+File, -Data, -Meta) is semidet

 storage_meta_data(+File, -Meta) is semidet

True if File is known in the store.

Arguments:

Data	- is a string holding the content of the file
Meta	- is a dict holding the meta data about the file.

 storage_file(?File) is nondet

 storage_file_extension(?File, ?Extension) is nondet

 storage_file_extension_head(?File, ?Extension, -Head) is nondet

 storage_file(+File, -Data, -Meta) is semidet

 storage_meta_data(+File, -Meta) is semidet

True if File is known in the store.

Arguments:

Data	- is a string holding the content of the file
Meta	- is a dict holding the meta data about the file.

 storage_file(?File) is nondet

 storage_file_extension(?File, ?Extension) is nondet

 storage_file_extension_head(?File, ?Extension, -Head) is nondet

 storage_file(+File, -Data, -Meta) is semidet

 storage_meta_data(+File, -Meta) is semidet

True if File is known in the store.

Arguments:

Data	- is a string holding the content of the file
Meta	- is a dict holding the meta data about the file.

 storage_file(?File) is nondet

 storage_file_extension(?File, ?Extension) is nondet

 storage_file_extension_head(?File, ?Extension, -Head) is nondet

 storage_file(+File, -Data, -Meta) is semidet

 storage_meta_data(+File, -Meta) is semidet

True if File is known in the store.

Arguments:

Data	- is a string holding the content of the file
Meta	- is a dict holding the meta data about the file.

 use_gitty_file(+File) is det

 use_gitty_file(+File, +Options) is det

Load a file from the Gitty store. Options are passed to load_files/2. Additional options are:

watch(+Boolean)

If true (default), reload the file if the user saves it.

 storage_store_term(+Term, -Hash) is det

 storage_load_term(+Hash, -Term) is det

Add/retrieve terms from the gitty store. This is used to create permanent links to arbitrary objects.

 storage_repack is det

 storage_repack(+Options) is det

Repack the storage directory. Currently only supports the files driver. For database drivers this is supposed to be handled by the database.