Modify the source file that defines PACKAGE to refer to SOURCE, an <upstream-source> whose tarball has SHA256 HASH (a bytevector). Return the new version string if an update was made, and #f otherwise.

Return a predicate that returns true when passed a package whose source is an <origin> with the URL-FETCH method, and one of its URLs passes MATCHING-URL?.

Coalesce the elements of SOURCES, a list of <upstream-source>, that correspond to the same version.

Return the subset of inputs of SOURCE that have the given TYPE.

If PACKAGE's source is a tarball or zip archive, return its archive type--a string such as "xz". Otherwise return #f.

Return an <upstream-source> object to update PACKAGE, a <package> object, or #f if none of UPDATERS matches PACKAGE. When several updaters match PACKAGE, try them until one of them returns an upstream source. It is the caller's responsibility to ensure that the returned source is newer than the current one.

Return a predicate that returns true when passed an <upstream-input> record of the given TYPE (a symbol such as 'propagated).

Return the new version, the file name of the new version tarball, and input changes for PACKAGE; return #f (three values) when PACKAGE is up-to-date; raise an error when the updater could not determine available releases. KEY-DOWNLOAD specifies a download policy for missing OpenPGP keys; allowed values: 'always', 'auto' (default), 'never', and 'interactive'.

When VERSION is specified, update PACKAGE to that version, even if that is a downgrade. When PARTIAL-VERSION? is true, treat VERSION as having been only partially specified, in which case the package will be updated to the newest compatible version if there are no exact match for VERSION. For example, providing "46" as the version may update the package to version "46.6.4".

Download the tarball at URL to the store; check its OpenPGP signature at SIGNATURE-URL, unless SIGNATURE-URL is false. On success, return the tarball file name; return #f on failure (network failure or authentication failure).

KEY-DOWNLOAD specifies a download policy for missing OpenPGP keys; allowed values: 'auto' (default), 'always', 'interactive' and 'never'; KEY-SERVER specifies the OpenPGP key server where the key should be looked up.

Return a variant of SOURCE that uses the same archive type as PACKAGE's source (gz, xz, zst, etc.). Return SOURCE if this is not applicable.

Return the subset of inputs of SOURCE that have the given TYPE.

Like 'package-latest-release', but ensure that the return source is newer than that of PACKAGE.