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emacs-build-system: Do not patch files containing NULs.

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This is a temporary workaround for <https://bugs.gnu.org/30116>, where
'substitute*' throws on files containing NUL characters.

* guix/build/emacs-build-system.scm (patch-el-files): Filter out elisp files
that contain NUL characters.

Co-authored-by: Ludovic Courtès <ludo@gnu.org>
This commit is contained in:
Maxim Cournoyer 2018-01-14 22:38:20 -05:00 • committed by Ludovic Courtès
parent 58b6812fd4
commit 7c599eac0c
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1 changed files with 29 additions and 12 deletions
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41
guix/build/emacs-build-system.scm
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@ -97,23 +97,40 @@ archive, a directory, or an Emacs Lisp file."
(define* (patch-el-files #:key outputs #:allow-other-keys)
"Substitute the absolute \"/bin/\" directory with the right location in the
store in '.el' files."
(define (file-contains-nul-char? file)
(call-with-input-file file
(lambda (in)
(let loop ((line (read-line in 'concat)))
(cond
((eof-object? line) #f)
((string-index line #\nul) #t)
(else (loop (read-line in 'concat))))))
#:binary #t))
(let* ((out (assoc-ref outputs "out"))
(elpa-name-ver (store-directory->elpa-name-version out))
(el-dir (string-append out %install-suffix "/" elpa-name-ver))
(substitute-cmd (lambda ()
(substitute* (find-files "." "\\.el$")
(("\"/bin/([^.]\\S*)\"" _ cmd-name)
(let ((cmd (which cmd-name)))
(unless cmd
(error
"patch-el-files: unable to locate " cmd-name))
(string-append "\"" cmd "\"")))))))
;; (ice-9 regex) uses libc's regexp routines, which cannot deal with
;; strings containing NULs. Filter out such files. TODO: Remove
;; this workaround when <https://bugs.gnu.org/30116> is fixed.
(el-files (remove file-contains-nul-char?
(find-files (getcwd) "\\.el$"))))
(define (substitute-program-names)
(substitute* el-files
(("\"/bin/([^.]\\S*)\"" _ cmd-name)
(let ((cmd (which cmd-name)))
(unless cmd
(error "patch-el-files: unable to locate " cmd-name))
(string-append "\"" cmd "\"")))))
(with-directory-excursion el-dir
;; Some old '.el' files (e.g., tex-buf.el in AUCTeX) are still encoded
;; with the "ISO-8859-1" locale.
(unless (false-if-exception (substitute-cmd))
;; Some old '.el' files (e.g., tex-buf.el in AUCTeX) are still
;; ISO-8859-1-encoded.
(unless (false-if-exception (substitute-program-names))
(with-fluids ((%default-port-encoding "ISO-8859-1"))
(substitute-cmd))))
(substitute-program-names))))
#t))
(define* (install #:key outputs