Like 'references', but cache results.

Return the base path of a path in the store.

Apply PROC over each element of LST, accumulating 'build-things' calls and coalescing them into a single call.

CUTOFF is the threshold above which we stop accumulating unresolved nodes.

Return #t if PATH is a store path, and not a sub-directory of a store path. This predicate is sometimes needed because files *under* a store path are not valid inputs.

Connect to the daemon at URI (a string), or, if PORT is not #f, use it as the I/O port over which to communicate to a build daemon.

When RESERVE-SPACE? is true, instruct it to reserve a little bit of extra space on the file system so that the garbage collector can still operate, should the disk become full. When CPU-AFFINITY is true, it must be an integer corresponding to an OS-level CPU number to which the daemon's worker process for this connection will be pinned. If NON-BLOCKING?, use a non-blocking socket when using the file, unix or guix URI schemes. If BUILT-IN-BUILDERS is provided, it should be a list of strings and this will be used instead of the builtin builders provided by the build daemon. Return a server object.

Ensure that a path is valid. If it is not valid, it may be made valid by running a substitute. As a GC root is not created by the daemon, you may want to call ADD-TEMP-ROOT on that store path.

Return an output path for the fixed output OUTPUT defined by HASH of type HASH-ALGO, of the derivation NAME. RECURSIVE? has the same meaning as for 'add-to-store'.

Return the list of path that refer to PATH.

Build THINGS, a list of store items which may be either '.drv' files or outputs, and return when the worker is done building them. Elements of THINGS that are not derivations can only be substituted and not built locally. Alternately, an element of THING can be a derivation/output name pair, in which case the daemon will attempt to substitute just the requested output of the derivation. Return #t on success.

When a handler is installed with 'with-build-handler', it is called any time 'build-things' is called.

Call PROC, and catch if a connection fails, print a warning and return #f.

Look up narinfos for PATHS on all of CACHES, a list of URLS, in that order. That is, when a cache lacks an AUTHORIZED? narinfo, look it up in the next cache, and so on.

Return a list of narinfos for PATHS or a subset thereof. The returned narinfos are either AUTHORIZED?, or they claim a hash that matches an AUTHORIZED? narinfo.

Return the narinfos for PATHS, invoking the server at CACHE when no information is available locally.

Return a fixed-output derivation that fetches REF, a <svn-reference> object. The output is expected to have recursive hash HASH of type HASH-ALGO (a symbol). Use NAME as the file name, or a generic name if #f.

Download from REF, a <svn-reference> object to STORE. Write progress reports to LOG.