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import: hackage: Support updating to a specific version.

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* gnu/import/hackage.scm
(hackage-fetch-and-hash, hackage-fetch): Support name and version
argument.
(import-release): New variable, formerly known as latest-release.
Support updating to a specific version.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>
Change-Id: I8f9e3ee99676cedca82f7c8c5ff51baa5a6fc46a
This commit is contained in:
Nicolas Graves 2024-10-29 14:53:51 +01:00 committed by Ludovic Courtès
parent 62b0d90cc7
commit abc3eb3319
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GPG key ID: 090B11993D9AEBB5
1 changed files with 13 additions and 16 deletions
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23
guix/import/hackage.scm
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@ -9,6 +9,7 @@
;;; Copyright © 2019 Simon Tournier <zimon.toutoune@gmail.com>
;;; Copyright © 2022 Hartmut Goebel <h.goebel@crazy-compilers.com>
;;; Copyright © 2023-2024 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2024 Nicolas Graves <ngraves@ngraves.fr>
;;;
;;; This file is part of GNU Guix.
;;;
@ -136,7 +137,7 @@ (define (read-cabal-and-hash port)
(values (read-cabal (canonical-newline-port port))
(bytevector->nix-base32-string (get-hash)))))
(define (hackage-fetch-and-hash name-version)
(define (hackage-fetch-and-hash name version)
"Fetch the latest Cabal revision for the package NAME-VERSION, and return
two values: the parsed Cabal file and its hash in nix-base32 format. If the
version part is omitted from the package name, then fetch the latest
@ -144,18 +145,19 @@ (define (hackage-fetch-and-hash name-version)
(guard (c ((and (http-get-error? c)
(= 404 (http-get-error-code c)))
(values #f #f))) ;"expected" if package is unknown
(let* ((name version (package-name->name+version name-version))
(let* ((name new-version (package-name->name+version name))
(version (or version new-version))
(url (hackage-cabal-url name version))
(port _ (http-fetch url))
(cabal hash (read-cabal-and-hash port)))
(close-port port)
(values cabal hash))))
(define (hackage-fetch name-version)
(define (hackage-fetch name version)
"Return the Cabal file for the package NAME-VERSION, or #f on failure. If
the version part is omitted from the package name, then return the latest
version."
(let ((cabal hash (hackage-fetch-and-hash name-version)))
(let ((cabal hash (hackage-fetch-and-hash name version)))
cabal))
(define string->license
@ -355,7 +357,7 @@ (define* (hackage->guix-package package-name #:key
(let ((cabal-meta cabal-hash
(if port
(read-cabal-and-hash port)
(hackage-fetch-and-hash package-name))))
(hackage-fetch-and-hash package-name #f))))
(if cabal-meta
(hackage-module->sexp (eval-cabal cabal-meta cabal-environment)
cabal-hash
@ -377,15 +379,10 @@ (define hackage-package?
(let ((hackage-rx (make-regexp "(https?://hackage.haskell.org|mirror://hackage/)")))
(url-predicate (cut regexp-exec hackage-rx <>))))
(define* (latest-release package #:key (version #f))
(define* (import-release package #:key (version #f))
"Return an <upstream-source> for the latest release of PACKAGE."
(when version
(raise
(formatted-message
(G_ "~a updater doesn't support updating to a specific version, sorry.")
"hackage")))
(let* ((hackage-name (package-upstream-name* package))
(cabal-meta (hackage-fetch hackage-name)))
(cabal-meta (hackage-fetch hackage-name version)))
(match cabal-meta
(#f
(format (current-error-port)
@ -407,6 +404,6 @@ (define %hackage-updater
(name 'hackage)
(description "Updater for Hackage packages")
(pred hackage-package?)
(import latest-release)))
(import import-release)))
;;; cabal.scm ends here