diff --git a/guix/build/emacs-utils.scm b/guix/build/emacs-utils.scm index 1684bf3262..8ee547f2b3 100644 --- a/guix/build/emacs-utils.scm +++ b/guix/build/emacs-utils.scm @@ -38,6 +38,7 @@ (define-module (guix build emacs-utils) emacs-generate-autoloads emacs-byte-compile-directory + emacs-header-parse as-display emacs-substitute-sexps @@ -114,6 +115,14 @@ (define* (emacs-byte-compile-directory dir) (byte-recompile-directory (file-name-as-directory ,dir) 0 1)))) (emacs-batch-eval expr))) +(define (emacs-header-parse section file) + "Parse the header SECTION in FILE and return it as a string." + (emacs-batch-script + `(progn + (require 'lisp-mnt) + (find-file ,file) + (princ (lm-header ,section))))) + (define as-display ;syntactic keyword for 'emacs-substitute-sexps' '(as display)) diff --git a/tests/build-emacs-utils.scm b/tests/build-emacs-utils.scm index 27cff46c38..081032285a 100644 --- a/tests/build-emacs-utils.scm +++ b/tests/build-emacs-utils.scm @@ -28,7 +28,7 @@ (define-module (test build-emacs-utils) (test-begin "build-emacs-utils") ;; Only run the following tests if emacs is present. -(test-skip (if (which "emacs") 0 2)) +(test-skip (if (which "emacs") 0 5)) (test-equal "emacs-batch-script: print foo from emacs" "foo" @@ -40,4 +40,29 @@ (define-module (test build-emacs-utils) "Lisp error: (wrong-type-argument numberp \"three\")"))) (emacs-batch-script '(mapcar 'number-to-string (list 1 2 "three"))))) +(call-with-temporary-directory + (lambda (directory) + (let ((mock-elisp-file (string-append directory "/foo.el"))) + (call-with-output-file mock-elisp-file + (lambda (port) + (display ";;; foo --- mock emacs package -*- lexical-binding: t -*- + +;; Created: 4 Jun 2022 +;; Keywords: lisp test +;; Version: 1.0.0 +;;; Commentary: +;;; Code: +;;; foo.el ends here +" + port))) + (test-equal "emacs-header-parse: fetch version" + "1.0.0" + (emacs-header-parse "version" mock-elisp-file)) + (test-equal "emacs-header-parse: fetch keywords" + "lisp test" + (emacs-header-parse "keywords" mock-elisp-file)) + (test-equal "emacs-header-parse: fetch nonexistent author" + "nil" + (emacs-header-parse "author" mock-elisp-file))))) + (test-end "build-emacs-utils")