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authorTimothy Sample <samplet@ngyro.com>2018-08-30 22:08:59 -0400
committerRicardo Wurmus <rekado@elephly.net>2018-10-01 12:12:08 +0200
commitbb6419f3745911aec87ad79c55bb953b36f246dd (patch)
treea9c5914ef7732230db2191cd3edb58b7bbb4a352
parentf54f04756f6d90c9fb3b5e45f3947329287f9b05 (diff)
build-system: haskell: Add #:cabal-revision argument.
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.
-rw-r--r--guix/build-system/haskell.scm32
-rw-r--r--guix/build/haskell-build-system.scm12
2 files changed, 43 insertions, 1 deletions
diff --git a/guix/build-system/haskell.scm b/guix/build-system/haskell.scm
index 1cb734631c..1ec11c71d8 100644
--- a/guix/build-system/haskell.scm
+++ b/guix/build-system/haskell.scm
@@ -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
diff --git a/guix/build/haskell-build-system.scm b/guix/build/haskell-build-system.scm
index 26519ce5a6..be4f5b583b 100644
--- a/guix/build/haskell-build-system.scm
+++ b/guix/build/haskell-build-system.scm
@@ -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)