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This is a service designed to provide information about Guix. At the
moment, this initial prototype gathers up information about packages,
the associated metadata and derivations.

The initial primary use case is to compare two different revisions of
Guix, detecting which packages are new, no longer present, updated or
otherwise different.

It's based on the Mumi project.

[1]: https://git.elephly.net/software/mumi.git
This commit is contained in:
Christopher Baines 2019-02-06 16:14:44 +00:00
commit 5a9262b38d
Signed by: cbaines
GPG key ID: 5E28A33B0B84F577
32 changed files with 9457 additions and 0 deletions
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guix-data-service/model/package-metadata.scm Normal file
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(define-module (guix-data-service model package-metadata)
#:use-module (srfi srfi-1)
#:use-module (ice-9 vlist)
#:use-module (ice-9 match)
#:use-module (squee)
#:use-module (gcrypt hash)
#:use-module (rnrs bytevectors)
#:use-module (guix base16)
#:use-module (guix inferior)
#:use-module (guix-data-service model utils)
#:export (select-package-metadata
insert-package-metadata
inferior-packages->package-metadata-ids))
(define (select-package-metadata hashes)
(string-append "SELECT id, sha1_hash "
"FROM package_metadata "
"WHERE sha1_hash IN ("
(string-join (map (lambda (hash)
(simple-format #f "'~A'" hash))
hashes)
",")
");"))
(define (insert-package-metadata metadata-rows)
(string-append "INSERT INTO package_metadata "
"(sha1_hash, synopsis, description, home_page) "
"VALUES "
(string-join
(map (match-lambda
((sha1_hash synopsis description home_page)
(string-append
"('" sha1_hash "',"
(value->quoted-string-or-null synopsis) ","
(value->quoted-string-or-null description) ","
(value->quoted-string-or-null home_page) ")")))
metadata-rows)
",")
" RETURNING id"
";"))
(define (inferior-packages->package-metadata-ids conn packages)
(define package-metadata
(map (lambda (package)
(let ((data (list (inferior-package-synopsis package)
(inferior-package-description package)
(inferior-package-home-page package))))
`(,(bytevector->base16-string
(sha1 (string->utf8
(string-join
(map (lambda (d)
(cond
((string? d) d)
((boolean? d) (simple-format #f "~A" d))
(else d)))
data)
":"))))
,@data)))
packages))
(define package-metadata-hashes
(map first package-metadata))
(let* ((existing-package-metadata-entries
(exec-query->vhash conn
(select-package-metadata
package-metadata-hashes)
second ;; sha1_hash
first)) ;; id))
(missing-package-metadata-entries
(delete-duplicates
(filter (lambda (metadata)
(not (vhash-assoc (first metadata)
existing-package-metadata-entries)))
package-metadata)))
(new-package-metadata-entries
(if (null? missing-package-metadata-entries)
'()
(map car (exec-query conn
(insert-package-metadata
missing-package-metadata-entries)))))
(new-entries-id-lookup-vhash
(two-lists->vhash (map first missing-package-metadata-entries)
new-package-metadata-entries)))
(map (lambda (sha1-hash)
(cdr
(or (vhash-assoc sha1-hash
existing-package-metadata-entries)
(vhash-assoc sha1-hash
new-entries-id-lookup-vhash)
(begin
sha1-hash
(error "missing package-metadata entry")))))
package-metadata-hashes)))