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>
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@ -472,6 +472,7 @@ SCM_TESTS = \
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tests/boot-parameters.scm \
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tests/bournish.scm \
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tests/builders.scm \
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tests/build-emacs-utils.scm \
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tests/build-utils.scm \
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tests/cache.scm \
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tests/challenge.scm \
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@ -3,6 +3,7 @@
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;;; Copyright © 2014 Alex Kost <alezost@gmail.com>
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;;; Copyright © 2018, 2020, 2022 Maxim Cournoyer <maxim.cournoyer@gmail.com>
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;;; Copyright © 2019 Liliana Marie Prikler <liliana.prikler@gmail.com>
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;;; Copyright © 2022 Fredrik Salomonsson <plattfot@posteo.net>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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@ -22,10 +23,19 @@
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(define-module (guix build emacs-utils)
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#:use-module (guix build utils)
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#:use-module (ice-9 format)
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#:use-module (ice-9 popen)
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#:use-module (ice-9 rdelim)
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#:use-module (srfi srfi-34)
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#:use-module (srfi srfi-35)
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#:export (%emacs
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emacs-batch-eval
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emacs-batch-edit-file
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emacs-batch-disable-compilation
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emacs-batch-script
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emacs-batch-error?
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emacs-batch-error-message
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emacs-generate-autoloads
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emacs-byte-compile-directory
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@ -69,6 +79,26 @@ true, evaluate using dynamic scoping."
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(add-file-local-variable 'no-byte-compile t)
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(basic-save-buffer))))
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(define-condition-type &emacs-batch-error &error
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emacs-batch-error?
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(message emacs-batch-error-message))
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(define (emacs-batch-script expr)
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"Execute the Elisp code EXPR in Emacs batch mode and return output."
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(let* ((error-pipe (pipe))
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(port (parameterize ((current-error-port (cdr error-pipe)))
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(open-pipe*
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OPEN_READ
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(%emacs) "--quick" "--batch"
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(string-append "--eval=" (expr->string expr)))))
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(output (read-string port))
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(status (close-pipe port)))
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(close-port (cdr error-pipe))
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(unless (zero? status)
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(raise (condition (&emacs-batch-error
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(message (read-string (car error-pipe)))))))
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output))
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(define (emacs-generate-autoloads name directory)
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"Generate autoloads for Emacs package NAME placed in DIRECTORY."
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(let* ((file (string-append directory "/" name "-autoloads.el"))
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@ -0,0 +1,43 @@
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;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2022 Fredrik Salomonsson <plattfot@posteo.net>
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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 (test build-emacs-utils)
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#:use-module (guix tests)
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#:use-module (guix build emacs-utils)
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#:use-module (guix build utils)
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#:use-module ((guix utils)
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#:select (call-with-temporary-directory))
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#:use-module (srfi srfi-34)
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#:use-module (srfi srfi-64))
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(test-begin "build-emacs-utils")
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;; Only run the following tests if emacs is present.
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(test-skip (if (which "emacs") 0 2))
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(test-equal "emacs-batch-script: print foo from emacs"
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"foo"
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(emacs-batch-script '(princ "foo")))
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(test-assert "emacs-batch-script: raise &emacs-batch-error on failure"
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(guard (c ((emacs-batch-error? c)
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(string-contains (emacs-batch-error-message c)
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"Lisp error: (wrong-type-argument numberp \"three\")")))
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(emacs-batch-script '(mapcar 'number-to-string (list 1 2 "three")))))
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(test-end "build-emacs-utils")
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