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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2015 Federico Beffa <beffa@fbengineering.ch>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
(define-module (guix build haskell-build-system)
#:use-module ((guix build gnu-build-system) #:prefix gnu:)
#:use-module (guix build utils)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-26)
#:use-module (ice-9 rdelim)
#:use-module (ice-9 regex)
#:use-module (ice-9 match)
#:export (%standard-phases
haskell-build))
;; Commentary:
;;
;; Builder-side code of the standard Haskell package build procedure.
;;
;; The Haskell compiler, to find libraries, relies on a library database with
;; a binary cache. For GHC the cache has to be named 'package.cache'. If every
;; library would generate the cache at build time, then they would clash in
;; profiles. For this reason we do not generate the cache when we generate
;; libraries substitutes. Instead:
;;
;; - At build time we use the 'setup-compiler' phase to generate a temporary
;; library database and its cache.
;;
;; - We generate the cache when a profile is created.
;;
;; Code:
;; Directory where we create the temporary libraries database with its cache
;; as required by the compiler.
(define %tmp-db-dir
(string-append (or (getenv "TMP") "/tmp")
"/package.conf.d"))
(define (run-setuphs command params)
(let ((setup-file (cond
((file-exists? "Setup.hs")
"Setup.hs")
((file-exists? "Setup.lhs")
"Setup.lhs")
(else
#f))))
(if setup-file
(begin
(format #t "running \"runhaskell Setup.hs\" with command ~s \
and parameters ~s~%"
command params)
(zero? (apply system* "runhaskell" setup-file command params)))
(error "no Setup.hs nor Setup.lhs found"))))
(define* (configure #:key outputs inputs tests? (configure-flags '())
#:allow-other-keys)
"Configure a given Haskell package."
(let* ((out (assoc-ref outputs "out"))
(doc (assoc-ref outputs "doc"))
(lib (assoc-ref outputs "lib"))
(bin (assoc-ref outputs "bin"))
(input-dirs (match inputs
(((_ . dir) ...)
dir)
(_ '())))
(params (append `(,(string-append "--prefix=" out))
`(,(string-append "--libdir=" (or lib out) "/lib"))
`(,(string-append "--bindir=" (or bin out) "/bin"))
`(,(string-append
"--docdir=" (or doc out)
"/share/doc/" (package-name-version out)))
'("--libsubdir=$compiler/$pkg-$version")
`(,(string-append "--package-db=" %tmp-db-dir))
'("--global")
`(,@(map
(cut string-append "--extra-include-dirs=" <>)
(search-path-as-list '("include") input-dirs)))
`(,@(map
(cut string-append "--extra-lib-dirs=" <>)
(search-path-as-list '("lib") input-dirs)))
(if tests?
'("--enable-tests")
'())
configure-flags)))
(run-setuphs "configure" params)))
(define* (build #:rest empty)
"Build a given Haskell package."
(run-setuphs "build" '()))
(define* (install #:rest empty)
"Install a given Haskell package."
(run-setuphs "copy" '()))
(define (package-name-version store-dir)
"Given a store directory STORE-DIR return 'name-version' of the package."
(let* ((base (basename store-dir)))
(string-drop base
(+ 1 (string-index base #\-)))))
(define (grep rx port)
"Given a regular-expression RX including a group, read from PORT until the
first match and return the content of the group."
(let ((line (read-line port)))
(if (eof-object? line)
#f
(let ((rx-result (regexp-exec rx line)))
(if rx-result
(match:substring rx-result 1)
(grep rx port))))))
(define* (setup-compiler #:key system inputs outputs #:allow-other-keys)
"Setup the compiler environment."
(let* ((haskell (assoc-ref inputs "haskell"))
(name-version (package-name-version haskell)))
(cond
((string-match "ghc" name-version)
(make-ghc-package-database system inputs outputs))
(else
(format #t
"Compiler ~a not supported~%" name-version)))))
(define (make-ghc-package-database system inputs outputs)
"Generate the GHC package database."
(let* ((haskell (assoc-ref inputs "haskell"))
(input-dirs (match inputs
(((_ . dir) ...)
dir)
(_ '())))
(conf-dirs (search-path-as-list
`(,(string-append "lib/"
(package-name-version haskell)
"/package.conf.d"))
input-dirs))
(conf-files (append-map (cut find-files <> "\\.conf$") conf-dirs)))
(mkdir-p %tmp-db-dir)
(for-each (lambda (file)
(copy-file file
(string-append %tmp-db-dir "/" (basename file))))
conf-files)
(zero? (system* "ghc-pkg"
(string-append "--package-db=" %tmp-db-dir)
"recache"))))
(define* (register #:key name system inputs outputs #:allow-other-keys)
"Generate the compiler registration file for a given Haskell package. Don't
generate the cache as it would clash in user profiles."
(let* ((out (assoc-ref outputs "out"))
(haskell (assoc-ref inputs "haskell"))
(lib (string-append out "/lib"))
(config-dir (string-append lib "/"
(package-name-version haskell)
"/package.conf.d"))
(id-rx (make-regexp "^id: *(.*)$"))
(lib-rx (make-regexp "lib.*\\.(a|so)"))
(config-file (string-append config-dir "/" name ".conf"))
(params
(list (string-append "--gen-pkg-config=" config-file))))
(unless (null? (find-files lib lib-rx))
(mkdir-p config-dir)
(run-setuphs "register" params)
(let ((config-file-name+id
(call-with-ascii-input-file config-file (cut grep id-rx <>))))
(rename-file config-file
(string-append config-dir "/" config-file-name+id
".conf"))))
#t))
(define* (check #:key tests? test-target #:allow-other-keys)
"Run the test suite of a given Haskell package."
(if tests?
(run-setuphs test-target '())
(begin
(format #t "test suite not run~%")
#t)))
(define* (haddock #:key outputs haddock? haddock-flags #:allow-other-keys)
"Run the test suite of a given Haskell package."
(if haddock?
(run-setuphs "haddock" haddock-flags)
#t))
(define %standard-phases
(modify-phases gnu:%standard-phases
(add-before 'configure 'setup-compiler setup-compiler)
(add-before 'install 'haddock haddock)
(add-after 'install 'register register)
(replace 'install install)
(replace 'check check)
(replace 'build build)
(replace 'configure configure)))
(define* (haskell-build #:key inputs (phases %standard-phases)
#:allow-other-keys #:rest args)
"Build the given Haskell package, applying all of PHASES in order."
(apply gnu:gnu-build
#:inputs inputs #:phases phases
args))
;;; haskell-build-system.scm ends here
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