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authorFederico Beffa <beffa@fbengineering.ch>2015-03-27 09:36:56 +0100
committerFederico Beffa <beffa@fbengineering.ch>2015-04-04 09:11:31 +0200
commit14dfdf2e0e4d1f18bcc1becf87aef932d5721d91 (patch)
treedb925f4f9d24613cdc0a12749f75797585315642 /guix/build/haskell-build-system.scm
parent5868a8bf9debed5cc3e62da23cf042189f7f7f69 (diff)
build-system: Add haskell-build-system.
* guix/build-system/haskell.scm: New file. * guix/build/haskell-build-system.scm: New file. * doc/guix.texi: Add section on 'haskell-build-system'.
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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"))
+ (input-dirs (match inputs
+ (((_ . dir) ...)
+ dir)
+ (_ '())))
+ (params (append `(,(string-append "--prefix=" out))
+ `(,(string-append
+ "--docdir=" out "/share/doc/"
+ (package-name-version out)))
+ `(,(string-append "--package-db=" %tmp-db-dir))
+ '("--global")
+ `(,(string-append
+ "--extra-include-dirs="
+ (list->search-path-as-string
+ (search-path-as-list '("include") input-dirs)
+ ":")))
+ `(,(string-append
+ "--extra-lib-dirs="
+ (list->search-path-as-string
+ (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/" system "-"
+ (package-name-version haskell)
+ "/package.conf.d"))
+ input-dirs))
+ (conf-files (append-map (cut find-files <> "\\.conf$") conf-dirs)))
+ (mkdir-p %tmp-db-dir)
+ (for-each (lambda (file)
+ (copy-file file
+ (string-append %tmp-db-dir "/" (basename file))))
+ conf-files)
+ (zero? (system* "ghc-pkg"
+ (string-append "--package-db=" %tmp-db-dir)
+ "recache"))))
+
+(define* (register #:key name system inputs outputs #:allow-other-keys)
+ "Generate the compiler registration file for a given Haskell package. Don't
+generate the cache as it would clash in user profiles."
+ (let* ((out (assoc-ref outputs "out"))
+ (haskell (assoc-ref inputs "haskell"))
+ (lib (string-append out "/lib"))
+ (config-dir (string-append lib "/" system
+ "-" (package-name-version haskell)
+ "/package.conf.d"))
+ (id-rx (make-regexp "^id: *(.*)$"))
+ (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?
+ (let* ((out (assoc-ref outputs "out"))
+ (doc-src (string-append (getcwd) "/dist/doc"))
+ (doc-dest (string-append out "/share/doc/"
+ (package-name-version out))))
+ (if (run-setuphs "haddock" haddock-flags)
+ (begin
+ (copy-recursively doc-src doc-dest)
+ #t)
+ #f))
+ #t))
+
+(define %standard-phases
+ (modify-phases gnu:%standard-phases
+ (add-before configure setup-compiler setup-compiler)
+ (add-after 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