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build-system: haskell: Add #:cabal-revision argument.

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Add a #:cabal-revision argument for specifying which Cabal file revision
from Hackage should be used.

* guix/build-system/haskell.scm (source-url->revision-url): New function.
(lower): Accept a cabal-revision keyword argument, convert it to an
origin record, and add it to the resulting bag's host-inputs.
(haskell-build): Pass the cabal-revision input to the builder as an
argument.
* guix/build/haskell-build-system.scm (patch-cabal-file): New phase.
(%standard-phases): Add it.
This commit is contained in:
Timothy Sample 2018-08-30 22:08:59 -04:00 committed by Ricardo Wurmus
parent f54f04756f
commit bb6419f374
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GPG Key ID: 197A5888235FACAC
2 changed files with 43 additions and 1 deletions
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32
guix/build-system/haskell.scm
View File

@ -21,6 +21,7 @@
#:use-module (guix utils)
#:use-module (guix packages)
#:use-module (guix derivations)
#:use-module (guix download)
#:use-module (guix search-paths)
#:use-module (guix build-system)
#:use-module (guix build-system gnu)
@ -48,14 +49,35 @@
(let ((haskell (resolve-interface '(gnu packages haskell))))
(module-ref haskell 'ghc)))
(define (source-url->revision-url url revision)
"Convert URL (a Hackage source URL) to the URL for the Cabal file at
version REVISION."
(let* ((last-slash (string-rindex url #\/))
(next-slash (string-rindex url #\/ 0 last-slash)))
(string-append (substring url 0 next-slash)
(substring url last-slash (- (string-length url)
(string-length ".tar.gz")))
"/revision/" revision ".cabal")))
(define* (lower name
#:key source inputs native-inputs outputs system target
(haskell (default-haskell))
cabal-revision
#:allow-other-keys
#:rest arguments)
"Return a bag for NAME."
(define private-keywords
'(#:target #:haskell #:inputs #:native-inputs))
'(#:target #:haskell #:cabal-revision #:inputs #:native-inputs))
(define (cabal-revision->origin cabal-revision)
(match cabal-revision
((revision hash)
(origin
(method url-fetch)
(uri (source-url->revision-url (origin-uri source) revision))
(sha256 (base32 hash))
(file-name (string-append name "-" revision ".cabal"))))
(#f #f)))
(and (not target) ;XXX: no cross-compilation
(bag
@ -64,6 +86,9 @@
(host-inputs `(,@(if source
`(("source" ,source))
'())
,@(match (cabal-revision->origin cabal-revision)
(#f '())
(revision `(("cabal-revision" ,revision))))
,@inputs
;; Keep the standard inputs of 'gnu-build-system'.
@ -103,6 +128,11 @@ provides a 'Setup.hs' file as its build system."
source)
(source
source))
#:cabal-revision ,(match (assoc-ref inputs
"cabal-revision")
(((? derivation? revision))
(derivation->output-path revision))
(revision revision))
#:configure-flags ,configure-flags
#:haddock-flags ,haddock-flags
#:system ,system

12
guix/build/haskell-build-system.scm
View File

@ -27,6 +27,7 @@
#:use-module (ice-9 regex)
#:use-module (ice-9 match)
#:use-module (ice-9 vlist)
#:use-module (ice-9 ftw)
#:export (%standard-phases
haskell-build))
@ -265,8 +266,19 @@ given Haskell package."
(run-setuphs "haddock" haddock-flags)
#t))
(define* (patch-cabal-file #:key cabal-revision #:allow-other-keys)
(when cabal-revision
;; Cabal requires there to be a single file with the suffix ".cabal".
(match (scandir "." (cut string-suffix? ".cabal" <>))
((original)
(format #t "replacing ~s with ~s~%" original cabal-revision)
(copy-file cabal-revision original))
(_ (error "Could not find a Cabal file to patch."))))
#t)
(define %standard-phases
(modify-phases gnu:%standard-phases
(add-after 'unpack 'patch-cabal-file patch-cabal-file)
(delete 'bootstrap)
(add-before 'configure 'setup-compiler setup-compiler)
(add-before 'install 'haddock haddock)