diff options
| -rw-r--r-- | guix/build-system/haskell.scm | 32 | ||||
| -rw-r--r-- | guix/build/haskell-build-system.scm | 12 |
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) |