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build: emacs-utils: Add an option to select scoping for batch eval. 

In Emacs 27, --eval now evaluates using lexical scoping.  This change adds an
option to select dynamic scoping, by using a workaround proposed in
<https://bugs.gnu.org/39823>.

* guix/build/emacs-utils.scm (emacs-batch-eval): Add a DYNAMIC? keyword
argument.  Wrap the EXPR with a call to EVAL that makes use of the argument
to select the scoping mode.
(emacs-generate-autoloads): Use it.
This commit is contained in:
Maxim Cournoyer 2020-03-22 10:42:44 -04:00
parent 6607aad53c
commit afc6b1c0b6
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GPG Key ID: 1260E46482E63562
1 changed files with 8 additions and 5 deletions
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13
guix/build/emacs-utils.scm
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@ -1,7 +1,7 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2014, 2018 Mark H Weaver <mhw@netris.org>
;;; Copyright © 2014 Alex Kost <alezost@gmail.com>
;;; Copyright © 2018 Maxim Cournoyer <maxim.cournoyer@gmail.com>
;;; Copyright © 2018, 2020 Maxim Cournoyer <maxim.cournoyer@gmail.com>
;;; Copyright © 2019 Leo Prikler <leo.prikler@student.tugraz.at>
;;;
;;; This file is part of GNU Guix.
@ -21,6 +21,7 @@
(define-module (guix build emacs-utils)
#:use-module (guix build utils)
#:use-module (ice-9 format)
#:export (%emacs
emacs-batch-eval
emacs-batch-edit-file
@ -47,10 +48,12 @@
expr
(format #f "~s" expr)))
(define (emacs-batch-eval expr)
"Run Emacs in batch mode, and execute the elisp code EXPR."
(define* (emacs-batch-eval expr #:key dynamic?)
"Run Emacs in batch mode, and execute the Elisp code EXPR. If DYNAMIC? is
true, evaluate using dynamic scoping."
(invoke (%emacs) "--quick" "--batch"
(string-append "--eval=" (expr->string expr))))
(format #f "--eval=(eval '~a ~:[t~;nil~])"
(expr->string expr) dynamic?)))
(define (emacs-batch-edit-file file expr)
"Load FILE in Emacs using batch mode, and execute the elisp code EXPR."
@ -70,7 +73,7 @@
(expr `(let ((backup-inhibited t)
(generated-autoload-file ,file))
(update-directory-autoloads ,directory))))
(emacs-batch-eval expr)))
(emacs-batch-eval expr #:dynamic? #t)))
(define* (emacs-byte-compile-directory dir)
"Byte compile all files in DIR and its sub-directories."