310 lines
12 KiB
Scheme
310 lines
12 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2015 Federico Beffa <beffa@fbengineering.ch>
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;;; Copyright © 2015 Eric Bavier <bavier@member.fsf.org>
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;;; Copyright © 2015 Paul van der Walt <paul@denknerd.org>
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;;; Copyright © 2018 Ricardo Wurmus <rekado@elephly.net>
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;;; Copyright © 2018 Alex Vong <alexvong1995@gmail.com>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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;;; GNU Guix is free software; you can redistribute it and/or modify it
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;;; under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 3 of the License, or (at
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;;; your option) any later version.
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;;;
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;;; GNU Guix is distributed in the hope that it will be useful, but
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;;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
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(define-module (guix build haskell-build-system)
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#:use-module ((guix build gnu-build-system) #:prefix gnu:)
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#:use-module (guix build utils)
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#:use-module (srfi srfi-1)
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#:use-module (srfi srfi-26)
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#:use-module (ice-9 rdelim)
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#:use-module (ice-9 regex)
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#:use-module (ice-9 match)
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#:use-module (ice-9 vlist)
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#:use-module (ice-9 ftw)
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#:export (%standard-phases
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haskell-build))
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;; Commentary:
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;;
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;; Builder-side code of the standard Haskell package build procedure.
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;;
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;; The Haskell compiler, to find libraries, relies on a library database with
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;; a binary cache. For GHC the cache has to be named 'package.cache'. If every
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;; library would generate the cache at build time, then they would clash in
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;; profiles. For this reason we do not generate the cache when we generate
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;; libraries substitutes. Instead:
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;;
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;; - At build time we use the 'setup-compiler' phase to generate a temporary
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;; library database and its cache.
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;;
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;; - We generate the cache when a profile is created.
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;;
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;; Code:
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;; Directory where we create the temporary libraries database with its cache
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;; as required by the compiler.
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(define %tmp-db-dir
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(string-append (or (getenv "TMP") "/tmp")
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"/package.conf.d"))
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(define (run-setuphs command params)
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(let ((setup-file (cond
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((file-exists? "Setup.hs")
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"Setup.hs")
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((file-exists? "Setup.lhs")
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"Setup.lhs")
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(else
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#f))))
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(if setup-file
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(begin
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(format #t "running \"runhaskell Setup.hs\" with command ~s \
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and parameters ~s~%"
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command params)
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(apply invoke "runhaskell" setup-file command params))
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(error "no Setup.hs nor Setup.lhs found"))))
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(define* (configure #:key outputs inputs tests? (configure-flags '())
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#:allow-other-keys)
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"Configure a given Haskell package."
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(let* ((out (assoc-ref outputs "out"))
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(doc (assoc-ref outputs "doc"))
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(lib (assoc-ref outputs "lib"))
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(bin (assoc-ref outputs "bin"))
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(name-version (strip-store-file-name out))
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(input-dirs (match inputs
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(((_ . dir) ...)
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dir)
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(_ '())))
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(ghc-path (getenv "GHC_PACKAGE_PATH"))
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(params (append `(,(string-append "--prefix=" out))
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`(,(string-append "--libdir=" (or lib out) "/lib"))
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`(,(string-append "--bindir=" (or bin out) "/bin"))
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`(,(string-append
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"--docdir=" (or doc out)
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"/share/doc/" name-version))
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'("--libsubdir=$compiler/$pkg-$version")
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`(,(string-append "--package-db=" %tmp-db-dir))
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'("--global")
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`(,@(map
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(cut string-append "--extra-include-dirs=" <>)
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(search-path-as-list '("include") input-dirs)))
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`(,@(map
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(cut string-append "--extra-lib-dirs=" <>)
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(search-path-as-list '("lib") input-dirs)))
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(if tests?
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'("--enable-tests")
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'())
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configure-flags)))
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;; Cabal errors if GHC_PACKAGE_PATH is set during 'configure', so unset
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;; and restore it.
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(unsetenv "GHC_PACKAGE_PATH")
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;; For packages where the Cabal build-type is set to "Configure",
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;; ./configure will be executed. In these cases, the following
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;; environment variable is needed to be able to find the shell executable.
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;; For other package types, the configure script isn't present. For more
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;; information, see the Build Information section of
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;; <https://www.haskell.org/cabal/users-guide/developing-packages.html>.
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(when (file-exists? "configure")
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(setenv "CONFIG_SHELL" "sh"))
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(run-setuphs "configure" params)
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(setenv "GHC_PACKAGE_PATH" ghc-path)
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#t))
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(define* (build #:rest empty)
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"Build a given Haskell package."
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(run-setuphs "build" '()))
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(define* (install #:rest empty)
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"Install a given Haskell package."
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(run-setuphs "copy" '()))
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(define (grep rx port)
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"Given a regular-expression RX including a group, read from PORT until the
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first match and return the content of the group."
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(let ((line (read-line port)))
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(if (eof-object? line)
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#f
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(let ((rx-result (regexp-exec rx line)))
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(if rx-result
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(match:substring rx-result 1)
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(grep rx port))))))
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(define* (setup-compiler #:key system inputs outputs #:allow-other-keys)
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"Setup the compiler environment."
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(let* ((haskell (assoc-ref inputs "haskell"))
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(name-version (strip-store-file-name haskell)))
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(cond
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((string-match "ghc" name-version)
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(make-ghc-package-database system inputs outputs))
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(else
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(format #t
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"Compiler ~a not supported~%" name-version)))))
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;;; TODO: Move this to (guix build utils)?
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(define-syntax-rule (with-null-error-port exp)
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"Evaluate EXP with the error port pointing to the bit bucket."
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(with-error-to-port (%make-void-port "w")
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(lambda () exp)))
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(define (make-ghc-package-database system inputs outputs)
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"Generate the GHC package database."
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(let* ((haskell (assoc-ref inputs "haskell"))
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(name-version (strip-store-file-name haskell))
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(input-dirs (match inputs
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(((_ . dir) ...)
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dir)
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(_ '())))
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;; Silence 'find-files' (see 'evaluate-search-paths')
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(conf-dirs (with-null-error-port
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(search-path-as-list
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`(,(string-append "lib/" name-version))
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input-dirs #:pattern ".*\\.conf.d$")))
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(conf-files (append-map (cut find-files <> "\\.conf$") conf-dirs)))
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(mkdir-p %tmp-db-dir)
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(for-each (lambda (file)
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(let ((dest (string-append %tmp-db-dir "/" (basename file))))
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(unless (file-exists? dest)
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(copy-file file dest))))
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conf-files)
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(invoke "ghc-pkg"
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(string-append "--package-db=" %tmp-db-dir)
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"recache")
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#t))
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(define* (register #:key name system inputs outputs #:allow-other-keys)
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"Generate the compiler registration and binary package database files for a
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given Haskell package."
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(define (conf-depends conf-file)
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;; Return a list of pkg-ids from the "depends" field in CONF-FILE
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(let ((port (open-input-file conf-file))
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(field-rx (make-regexp "^(.*):")))
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(let loop ((collecting #f)
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(deps '()))
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(let* ((line (read-line port))
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(field (and=> (and (not (eof-object? line))
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(regexp-exec field-rx line))
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(cut match:substring <> 1))))
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(cond
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((and=> field (cut string=? <> "depends"))
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;; The first dependency is listed on the same line as "depends:",
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;; so drop those characters. A line may list more than one .conf.
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(let ((d (string-tokenize (string-drop line 8))))
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(loop #t (append d deps))))
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((or (eof-object? line) (and collecting field))
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(begin
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(close-port port)
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(reverse! deps)))
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(collecting
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(loop #t (append (string-tokenize line) deps)))
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(else (loop #f deps)))))))
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(define (install-transitive-deps conf-file src dest)
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;; Copy .conf files from SRC to DEST for dependencies in CONF-FILE, and
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;; their dependencies, etc.
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(let loop ((seen vlist-null)
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(lst (conf-depends conf-file)))
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(match lst
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(() #t) ;done
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((id . tail)
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(if (not (vhash-assoc id seen))
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(let ((dep-conf (string-append src "/" id ".conf"))
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(dep-conf* (string-append dest "/" id ".conf")))
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(copy-file dep-conf dep-conf*) ;XXX: maybe symlink instead?
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(loop (vhash-cons id #t seen)
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(append lst (conf-depends dep-conf))))
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(loop seen tail))))))
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(let* ((out (assoc-ref outputs "out"))
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(haskell (assoc-ref inputs "haskell"))
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(name-verion (strip-store-file-name haskell))
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(lib (string-append out "/lib"))
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(config-dir (string-append lib
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"/" name-verion
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"/" name ".conf.d"))
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(id-rx (make-regexp "^id: *(.*)$"))
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(config-file (string-append out "/" name ".conf"))
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(params
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(list (string-append "--gen-pkg-config=" config-file))))
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(run-setuphs "register" params)
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;; The conf file is created only when there is a library to register.
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(when (file-exists? config-file)
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(mkdir-p config-dir)
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(let* ((config-file-name+id
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(call-with-ascii-input-file config-file (cut grep id-rx <>))))
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(install-transitive-deps config-file %tmp-db-dir config-dir)
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(rename-file config-file
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(string-append config-dir "/"
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config-file-name+id ".conf"))
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(invoke "ghc-pkg"
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(string-append "--package-db=" config-dir)
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"recache")))
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#t))
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(define* (check #:key tests? test-target #:allow-other-keys)
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"Run the test suite of a given Haskell package."
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(if tests?
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(run-setuphs test-target '())
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(format #t "test suite not run~%"))
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#t)
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(define* (haddock #:key outputs haddock? haddock-flags #:allow-other-keys)
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"Generate the Haddock documentation of a given Haskell package."
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(when haddock?
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(run-setuphs "haddock" haddock-flags))
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#t)
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(define* (patch-cabal-file #:key cabal-revision #:allow-other-keys)
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(when cabal-revision
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;; Cabal requires there to be a single file with the suffix ".cabal".
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(match (scandir "." (cut string-suffix? ".cabal" <>))
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((original)
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(format #t "replacing ~s with ~s~%" original cabal-revision)
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(copy-file cabal-revision original))
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(_ (error "Could not find a Cabal file to patch."))))
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#t)
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(define* (generate-setuphs #:rest empty)
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"Generate a default Setup.hs if needed."
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(when (not (or (file-exists? "Setup.hs")
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(file-exists? "Setup.lhs")))
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(format #t "generating missing Setup.hs~%")
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(with-output-to-file "Setup.hs"
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(lambda ()
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(format #t "import Distribution.Simple~%")
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(format #t "main = defaultMain~%"))))
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#t)
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(define %standard-phases
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(modify-phases gnu:%standard-phases
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(add-after 'unpack 'patch-cabal-file patch-cabal-file)
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(add-after 'unpack 'generate-setuphs generate-setuphs)
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(delete 'bootstrap)
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(add-before 'configure 'setup-compiler setup-compiler)
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(add-before 'install 'haddock haddock)
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(add-after 'install 'register register)
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(replace 'install install)
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(replace 'check check)
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(replace 'build build)
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(replace 'configure configure)))
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(define* (haskell-build #:key inputs (phases %standard-phases)
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#:allow-other-keys #:rest args)
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"Build the given Haskell package, applying all of PHASES in order."
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(apply gnu:gnu-build
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#:inputs inputs #:phases phases
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args))
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;;; haskell-build-system.scm ends here
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