@@ 521,6 521,25 @@ DOCUMENTATION-COMPRESSOR-FLAGS."
;; Return #t if FILE has hard links.
(> (stat:nlink (lstat file)) 1))
+ (define (points-to-symlink? symlink)
+ ;; Return #t if SYMLINK points to another symbolic link.
+ (let* ((target (readlink symlink))
+ (target-absolute (if (string-prefix? "/" target)
+ target
+ (string-append (dirname symlink)
+ "/" target))))
+ (catch 'system-error
+ (lambda ()
+ (symbolic-link? target-absolute))
+ (lambda args
+ (if (= ENOENT (system-error-errno args))
+ (begin
+ (format (current-error-port)
+ "The symbolic link '~a' target is missing: '~a'\n"
+ symlink target-absolute)
+ #f)
+ (apply throw args))))))
+
(define (maybe-compress-directory directory regexp)
(or (not (directory-exists? directory))
(match (find-files directory regexp)
@@ 538,12 557,17 @@ DOCUMENTATION-COMPRESSOR-FLAGS."
;; Compress the non-symlink files, and adjust symlinks to refer
;; to the compressed files. Leave files that have hard links
;; unchanged ('gzip' would refuse to compress them anyway.)
- (and (zero? (apply system* documentation-compressor
- (append documentation-compressor-flags
- (remove has-links? regular-files))))
- (every retarget-symlink
- (filter (cut string-match regexp <>)
- symlinks)))))))))
+ ;; Also, do not retarget symbolic links pointing to other
+ ;; symbolic links, since these are not compressed.
+ (and (every retarget-symlink
+ (filter (lambda (symlink)
+ (and (not (points-to-symlink? symlink))
+ (string-match regexp symlink)))
+ symlinks))
+ (zero?
+ (apply system* documentation-compressor
+ (append documentation-compressor-flags
+ (remove has-links? regular-files)))))))))))
(define (maybe-compress output)
(and (maybe-compress-directory (string-append output "/share/man")