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guix: emacs-utils: Add emacs-batch-script.

* guix/build/emacs-utils.scm (emacs-batch-script): New procedure.

* tests/build-emacs-utils.scm: New file.

* Makefile.am (TESTS): Add `tests/build-emacs-utils.scm'.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>
Fredrik Salomonsson 2022-06-05 19:51:42 +00:00 committed by Ludovic Courtès
parent 6013f80810
commit f8275916fc
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GPG Key ID: 090B11993D9AEBB5
3 changed files with 74 additions and 0 deletions

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@ -472,6 +472,7 @@ SCM_TESTS = \
tests/boot-parameters.scm \
tests/bournish.scm \
tests/builders.scm \
tests/build-emacs-utils.scm \
tests/build-utils.scm \
tests/cache.scm \
tests/challenge.scm \

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@ -3,6 +3,7 @@
;;; Copyright © 2014 Alex Kost <alezost@gmail.com>
;;; Copyright © 2018, 2020, 2022 Maxim Cournoyer <maxim.cournoyer@gmail.com>
;;; Copyright © 2019 Liliana Marie Prikler <liliana.prikler@gmail.com>
;;; Copyright © 2022 Fredrik Salomonsson <plattfot@posteo.net>
;;;
;;; This file is part of GNU Guix.
;;;
@ -22,10 +23,19 @@
(define-module (guix build emacs-utils)
#:use-module (guix build utils)
#:use-module (ice-9 format)
#:use-module (ice-9 popen)
#:use-module (ice-9 rdelim)
#:use-module (srfi srfi-34)
#:use-module (srfi srfi-35)
#:export (%emacs
emacs-batch-eval
emacs-batch-edit-file
emacs-batch-disable-compilation
emacs-batch-script
emacs-batch-error?
emacs-batch-error-message
emacs-generate-autoloads
emacs-byte-compile-directory
@ -69,6 +79,26 @@ true, evaluate using dynamic scoping."
(add-file-local-variable 'no-byte-compile t)
(basic-save-buffer))))
(define-condition-type &emacs-batch-error &error
emacs-batch-error?
(message emacs-batch-error-message))
(define (emacs-batch-script expr)
"Execute the Elisp code EXPR in Emacs batch mode and return output."
(let* ((error-pipe (pipe))
(port (parameterize ((current-error-port (cdr error-pipe)))
(open-pipe*
OPEN_READ
(%emacs) "--quick" "--batch"
(string-append "--eval=" (expr->string expr)))))
(output (read-string port))
(status (close-pipe port)))
(close-port (cdr error-pipe))
(unless (zero? status)
(raise (condition (&emacs-batch-error
(message (read-string (car error-pipe)))))))
output))
(define (emacs-generate-autoloads name directory)
"Generate autoloads for Emacs package NAME placed in DIRECTORY."
(let* ((file (string-append directory "/" name "-autoloads.el"))

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@ -0,0 +1,43 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2022 Fredrik Salomonsson <plattfot@posteo.net>
;;;
;;; 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 (test build-emacs-utils)
#:use-module (guix tests)
#:use-module (guix build emacs-utils)
#:use-module (guix build utils)
#:use-module ((guix utils)
#:select (call-with-temporary-directory))
#:use-module (srfi srfi-34)
#:use-module (srfi srfi-64))
(test-begin "build-emacs-utils")
;; Only run the following tests if emacs is present.
(test-skip (if (which "emacs") 0 2))
(test-equal "emacs-batch-script: print foo from emacs"
"foo"
(emacs-batch-script '(princ "foo")))
(test-assert "emacs-batch-script: raise &emacs-batch-error on failure"
(guard (c ((emacs-batch-error? c)
(string-contains (emacs-batch-error-message c)
"Lisp error: (wrong-type-argument numberp \"three\")")))
(emacs-batch-script '(mapcar 'number-to-string (list 1 2 "three")))))
(test-end "build-emacs-utils")