guix-devel/guix/build/emacs-build-system.scm

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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2015 Federico Beffa <beffa@fbengineering.ch>
;;; Copyright © 2016 David Thompson <davet@gnu.org>
;;; Copyright © 2016 Alex Kost <alezost@gmail.com>
;;; Copyright © 2018 Maxim Cournoyer <maxim.cournoyer@gmail.com>
;;;
;;; 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-11)
#:use-module (srfi srfi-26)
#:use-module (ice-9 rdelim)
#:use-module (ice-9 regex)
#:use-module (ice-9 match)
#:export (%standard-phases
%default-include
%default-exclude
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 %legacy-install-suffix "/share/emacs/site-lisp")
(define %install-suffix (string-append %legacy-install-suffix "/guix.d"))
;; These are the default inclusion/exclusion regexps for the install phase.
(define %default-include '("^[^/]*\\.el$" "^[^/]*\\.info$" "^doc/.*\\.info$"))
(define %default-exclude '("^\\.dir-locals\\.el$" "-pkg\\.el$"
"^[^/]*tests?\\.el$"))
(define gnu:unpack (assoc-ref gnu:%standard-phases 'unpack))
(define (store-file->elisp-source-file file)
"Convert FILE, a store file name for an Emacs Lisp source file, into a file
name that has been stripped of the hash and version number."
(let ((suffix ".el"))
(let-values (((name version)
(package-name->name+version
(basename
(strip-store-file-name file) suffix))))
(string-append name suffix))))
(define* (unpack #:key source #:allow-other-keys)
"Unpack SOURCE into the build directory. SOURCE may be a compressed
archive, a directory, or an Emacs Lisp file."
(if (string-suffix? ".el" source)
(begin
(mkdir "source")
(chdir "source")
(copy-file source (store-file->elisp-source-file source))
#t)
(gnu:unpack #:source source)))
(define* (set-emacs-load-path #:key inputs #:allow-other-keys)
"Set the EMACSLOADPATH environment variable so that dependencies are found."
(let* ((input-elisp-dirs (emacs-inputs-el-directories
(emacs-inputs-directories inputs)))
(emacs-load-path-value (string-join
input-elisp-dirs ":" 'suffix)))
(setenv "EMACSLOADPATH" emacs-load-path-value)
(format #t "environment variable `EMACSLOADPATH' set to ~a\n"
emacs-load-path-value)))
(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)))
(setenv "SHELL" "sh")
(parameterize ((%emacs emacs))
(emacs-byte-compile-directory el-dir))))
(define* (patch-el-files #:key outputs #:allow-other-keys)
"Substitute the absolute \"/bin/\" directory with the right location in the
store in '.el' files."
(define (file-contains-nul-char? file)
(call-with-input-file file
(lambda (in)
(let loop ((line (read-line in 'concat)))
(cond
((eof-object? line) #f)
((string-index line #\nul) #t)
(else (loop (read-line in 'concat))))))
#:binary #t))
(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))
;; (ice-9 regex) uses libc's regexp routines, which cannot deal with
;; strings containing NULs. Filter out such files. TODO: Remove
;; this workaround when <https://bugs.gnu.org/30116> is fixed.
(el-files (remove file-contains-nul-char?
(find-files (getcwd) "\\.el$"))))
(define (substitute-program-names)
(substitute* el-files
(("\"/bin/([^.]\\S*)\"" _ cmd-name)
(let ((cmd (which cmd-name)))
(unless cmd
(error "patch-el-files: unable to locate " cmd-name))
(string-append "\"" cmd "\"")))))
(with-directory-excursion el-dir
;; Some old '.el' files (e.g., tex-buf.el in AUCTeX) are still
;; ISO-8859-1-encoded.
(unless (false-if-exception (substitute-program-names))
(with-fluids ((%default-port-encoding "ISO-8859-1"))
(substitute-program-names))))
#t))
(define* (install #:key outputs
(include %default-include)
(exclude %default-exclude)
#:allow-other-keys)
"Install the package contents."
(define source (getcwd))
(define* (install-file? file stat #:key verbose?)
(let* ((stripped-file (string-trim
(string-drop file (string-length source)) #\/)))
(define (match-stripped-file action regex)
(let ((result (string-match regex stripped-file)))
(when (and result verbose?)
(format #t "info: ~A ~A as it matches \"~A\"\n"
stripped-file action regex))
result))
(when verbose?
(format #t "info: considering installing ~A\n" stripped-file))
(and (any (cut match-stripped-file "included" <>) include)
(not (any (cut match-stripped-file "excluded" <>) exclude)))))
(let* ((out (assoc-ref outputs "out"))
(elpa-name-ver (store-directory->elpa-name-version out))
(target-directory (string-append out %install-suffix "/" elpa-name-ver))
(files-to-install (find-files source install-file?)))
(cond
((not (null? files-to-install))
(for-each
(lambda (file)
(let* ((stripped-file (string-drop file (string-length source)))
(target-file (string-append target-directory stripped-file)))
(format #t "`~a' -> `~a'~%" file target-file)
(install-file file (dirname target-file))))
files-to-install)
#t)
(else
(format #t "error: No files found to install.\n")
(find-files source (lambda (file stat)
(install-file? file stat #:verbose? #t)))
#f))))
(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/"))
(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-input->el-directory emacs-input)
"Return the correct Elisp directory location of EMACS-INPUT or #f if none."
(let ((legacy-elisp-dir (string-append emacs-input %legacy-install-suffix))
(guix-elisp-dir (string-append
emacs-input %install-suffix "/"
(store-directory->elpa-name-version emacs-input))))
(cond
((file-exists? guix-elisp-dir) guix-elisp-dir)
((file-exists? legacy-elisp-dir) legacy-elisp-dir)
(else (format #t "warning: could not locate elisp directory under `~a'\n"
emacs-input)
#f))))
(define (emacs-inputs-el-directories dirs)
"Build the list of Emacs Lisp directories from the Emacs package directory
DIRS."
(filter-map emacs-input->el-directory dirs))
(define (package-name-version->elpa-name-version name-ver)
"Convert the Guix package NAME-VER to the corresponding ELPA name-version
format. Essentially drop the prefix used in Guix."
(if (emacs-package? name-ver) ; checks for "emacs-" prefix
(string-drop name-ver (string-length "emacs-"))
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))
(define %standard-phases
(modify-phases gnu:%standard-phases
(add-after 'set-paths 'set-emacs-load-path set-emacs-load-path)
(replace 'unpack unpack)
(delete 'bootstrap)
(delete 'configure)
;; Move the build phase after install: the .el files are byte compiled
;; directly in the store.
(delete 'build)
(replace 'install install)
(add-after 'install 'build build)
(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