Return #t if OBJECT leads to a file in the store once unquoted in a G-expression; otherwise return #f.

Return a gexp that surrounds BODY with a definition of the legacy '%build-inputs', '%outputs', and '%output' variables based on INPUTS, a list of name/gexp-input tuples, and OUTPUTS, a list of strings.

Import FILES into the store and return the resulting derivation or store file name (a derivation is created if and only if some elements of FILES are file-like objects and not local file names.) FILES must be a list of (FINAL-PATH . FILE) pairs. Each FILE is mapped to FINAL-PATH in the resulting store path. FILE can be either a file name, or a file-like object, as returned by 'local-file' for example.

Turn SEXP into a gexp without any references.

Using this is a way for the caller to tell that SEXP doesn't need to be scanned for file-like objects, thereby reducing processing costs. This is particularly useful if SEXP is a long list or a deep tree.

Return the previously-authenticated commits under KEY as a list of commit IDs (hex strings).

Authenticate REPOSITORY up to commit END, an OID. Authentication starts with commit START, an OID, which must be signed by SIGNER; an exception is raised if that is not the case. Commits listed in AUTHENTIC-COMMITS and their closure are considered authentic. Return an alist mapping OpenPGP public keys to the number of commits signed by that key that have been traversed.

The OpenPGP keyring is loaded from KEYRING-REFERENCE in REPOSITORY, where KEYRING-REFERENCE is the name of a branch. The list of authenticated commits is cached in the authentication cache under CACHE-KEY.

HISTORICAL-AUTHORIZATIONS must be a list of OpenPGP fingerprints (bytevectors) denoting the authorized keys for commits whose parent lack the '.guix-authorizations' file.

Load the '.key' files from the tree at REFERENCE in REPOSITORY and return an OpenPGP keyring.