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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 emacs-build-system)
#:use-module ((guix build gnu-build-system) #:prefix gnu:)
#:use-module (guix build utils)
#:use-module (guix build emacs-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
emacs-build))
;; Commentary:
;;
;; Builder-side code of the build procedure for ELPA Emacs packages.
;;
;; Code:
;; Directory suffix where we install ELPA packages. We avoid ".../elpa" as
;; Emacs expects to find the ELPA repository 'archive-contents' file and the
;; archive signature.
(define %install-suffix "/share/emacs/site-lisp/guix.d")
(define* (build #:key outputs inputs #:allow-other-keys)
"Compile .el files."
(let* ((emacs (string-append (assoc-ref inputs "emacs") "/bin/emacs"))
(out (assoc-ref outputs "out"))
(elpa-name-ver (store-directory->elpa-name-version out))
(el-dir (string-append out %install-suffix "/" elpa-name-ver))
(deps-dirs (emacs-inputs-directories inputs)))
(setenv "SHELL" "sh")
(parameterize ((%emacs emacs))
(emacs-byte-compile-directory el-dir
(emacs-inputs-el-directories deps-dirs)))))
(define* (patch-el-files #:key outputs #:allow-other-keys)
"Substitute the absolute \"/bin/\" directory with the right location in the
store in '.el' files."
(let* ((out (assoc-ref outputs "out"))
(elpa-name-ver (store-directory->elpa-name-version out))
(el-dir (string-append out %install-suffix "/" elpa-name-ver))
(substitute-cmd (lambda ()
(substitute* (find-files "." "\\.el$")
(("\"/bin/([^.].*)\"" _ cmd)
(string-append "\"" (which cmd) "\""))))))
(with-directory-excursion el-dir
;; Some old '.el' files (e.g., tex-buf.el in AUCTeX) are still encoded
;; with the "ISO-8859-1" locale.
(unless (false-if-exception (substitute-cmd))
(with-fluids ((%default-port-encoding "ISO-8859-1"))
(substitute-cmd))))
#t))
(define* (install #:key outputs #:allow-other-keys)
"Install the package contents."
(let* ((out (assoc-ref outputs "out"))
(elpa-name-ver (store-directory->elpa-name-version out))
(src-dir (getcwd))
(tgt-dir (string-append out %install-suffix "/" elpa-name-ver)))
(copy-recursively src-dir tgt-dir)
#t))
(define* (move-doc #:key outputs #:allow-other-keys)
"Move info files from the ELPA package directory to the info directory."
(let* ((out (assoc-ref outputs "out"))
(elpa-name-ver (store-directory->elpa-name-version out))
(el-dir (string-append out %install-suffix "/" elpa-name-ver))
(name-ver (strip-store-file-name out))
(info-dir (string-append out "/share/info/" name-ver))
(info-files (find-files el-dir "\\.info$")))
(unless (null? info-files)
(mkdir-p info-dir)
(with-directory-excursion el-dir
(when (file-exists? "dir") (delete-file "dir"))
(for-each (lambda (f)
(copy-file f (string-append info-dir "/" (basename f)))
(delete-file f))
info-files)))
#t))
(define* (make-autoloads #:key outputs inputs #:allow-other-keys)
"Generate the autoloads file."
(let* ((emacs (string-append (assoc-ref inputs "emacs") "/bin/emacs"))
(out (assoc-ref outputs "out"))
(elpa-name-ver (store-directory->elpa-name-version out))
(elpa-name (package-name->name+version elpa-name-ver))
(el-dir (string-append out %install-suffix "/" elpa-name-ver)))
(parameterize ((%emacs emacs))
(emacs-generate-autoloads elpa-name el-dir))
#t))
(define (emacs-package? name)
"Check if NAME correspond to the name of an Emacs package."
(string-prefix? "emacs-" name))
(define (emacs-inputs inputs)
"Retrieve the list of Emacs packages from INPUTS."
(filter (match-lambda
((label . directory)
(emacs-package? ((compose package-name->name+version
strip-store-file-name)
directory)))
(_ #f))
inputs))
(define (emacs-inputs-directories inputs)
"Extract the list of Emacs package directories from INPUTS."
(let ((inputs (emacs-inputs inputs)))
(match inputs
(((names . directories) ...) directories))))
(define (emacs-inputs-el-directories dirs)
"Build the list of Emacs Lisp directories from the Emacs package directory
DIRS."
(map (lambda (d)
(string-append d %install-suffix "/"
(store-directory->elpa-name-version d)))
dirs))
(define (package-name-version->elpa-name-version name-ver)
"Convert the Guix package NAME-VER to the corresponding ELPA name-version
format. Essnetially drop the prefix used in Guix."
(let ((name (strip-store-file-name name-ver)))
(if (emacs-package? name-ver)
(strip-store-file-name name-ver)
name-ver)))
(define (store-directory->elpa-name-version store-dir)
"Given a store directory STORE-DIR return the part of the basename after the
second hyphen. This corresponds to 'name-version' as used in ELPA packages."
((compose package-name-version->elpa-name-version
strip-store-file-name)
store-dir))
;; from (guix utils). Should we put it in (guix build utils)?
(define (package-name->name+version name)
"Given NAME, a package name like \"foo-0.9.1b\", return two values:
\"foo\" and \"0.9.1b\". When the version part is unavailable, NAME and
#f are returned. The first hyphen followed by a digit is considered to
introduce the version part."
;; See also `DrvName' in Nix.
(define number?
(cut char-set-contains? char-set:digit <>))
(let loop ((chars (string->list name))
(prefix '()))
(match chars
(()
(values name #f))
((#\- (? number? n) rest ...)
(values (list->string (reverse prefix))
(list->string (cons n rest))))
((head tail ...)
(loop tail (cons head prefix))))))
(define %standard-phases
(modify-phases gnu:%standard-phases
(delete 'configure)
(delete 'check)
(delete 'install)
(replace 'build build)
(add-before 'build 'install install)
(add-after 'install 'make-autoloads make-autoloads)
(add-after 'make-autoloads 'patch-el-files patch-el-files)
(add-after 'make-autoloads 'move-doc move-doc)))
(define* (emacs-build #:key inputs (phases %standard-phases)
#:allow-other-keys #:rest args)
"Build the given Emacs package, applying all of PHASES in order."
(apply gnu:gnu-build
#:inputs inputs #:phases phases
args))
;;; emacs-build-system.scm ends here
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