DRAFT substitute: Fetch digests and restore store items from digests. wip-digests

DRAFT: Tests missing, compression support missing.

* guix/scripts/substitute.scm (digest-cache-file, cache-digest!)
(digest-request, lookup-digest): New procedures.
(fetch-narinfos)[%not-slash]: New variable.
[handle-digest-response, handle-response]: New procedures.
[do-fetch]: Append digest requests to narinfo requests.  Pass
'handle-response' to 'http-multiple-get' instead of
'handle-narinfo-response'.
(process-substitution): Rename to...
(process-substitution/nar): ... this.  Make 'narinfo' a parameter.
(http-fetch-files, nar-hash)
(process-substitution, process-substitution/digest): New procedures.
(guix-substitute): Pass #:delete-entry to 'maybe-remove-expired-cache-entries'.
* guix/digests.scm (sexp->digest): New procedure.

0 files changed, 0 insertions, 0 deletions