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authorFredrik Salomonsson <plattfot@posteo.net>2022-06-05 19:51:43 +0000
committerLudovic Courtès <ludo@gnu.org>2022-06-17 23:39:32 +0200
commitc3afbd05bf541b31b122e6093ff10eabf6a47926 (patch)
tree8aeb015115df87b97f4a02459bcc4d0715d322b2
parentf8275916fc6fcb3dd9bd8ef7dc4ddce2dca98c7d (diff)
guix: emacs-utils: Add emacs-header-parse.
* guix/build/emacs-utils.scm (emacs-header-parse): New procedure. * tests/build-emacs-utils.scm ("emacs-header-parse: fetch version", "emacs-header-parse: fetch keywords", "emacs-header-parse: fetch nonexistent author"): New tests. Signed-off-by: Ludovic Courtès <ludo@gnu.org>
-rw-r--r--guix/build/emacs-utils.scm9
-rw-r--r--tests/build-emacs-utils.scm27
2 files changed, 35 insertions, 1 deletions
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 @@
emacs-generate-autoloads
emacs-byte-compile-directory
+ emacs-header-parse
as-display
emacs-substitute-sexps
@@ -114,6 +115,14 @@ true, evaluate using dynamic scoping."
(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 @@
(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 @@
"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")