Return the list of valid "derivers" of PATH---i.e., all the .drv present in the store that have PATH among their outputs.

Run MVAL, a monadic value in the store monad, in STORE, an open store connection, and return the result.

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 a list of root/target pairs: for each pair, the first element is the GC root file name and the second element is its target in the store.

When talking to a local daemon, this operation is equivalent to the 'gc-roots' procedure in (guix store roots), except that the 'find-roots' excludes potential roots that do not point to store items.

Add TEXT under file NAME in the store, and return its store path. REFERENCES is the list of store paths referred to by the resulting store path.

Return the list of references of PATH.

Return the protocol version of STORE as an integer.

Connect to the daemon at URI-OR-FILENAME and return an input/output port. If NON-BLOCKING?, use a non-blocking socket when using the file, unix or guix URI schemes.

This is a low-level procedure that does not perform the initial handshake with the daemon. Use 'open-connection' for that.

Return #t if PATH is a derivation path.

Return the base path of a path in the store.