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-rw-r--r--gnu/packages/groff.scm47
1 files changed, 47 insertions, 0 deletions
diff --git a/gnu/packages/groff.scm b/gnu/packages/groff.scm
index 67dd1dbfa6..9b949f8ff3 100644
--- a/gnu/packages/groff.scm
+++ b/gnu/packages/groff.scm
@@ -2,6 +2,7 @@
;;; Copyright © 2013 Andreas Enge <andreas@enge.fr>
;;; Copyright © 2014 Mark H Weaver <mhw@netris.org>
;;; Copyright © 2016 Ricardo Wurmus <rekado@elephly.net>
+;;; Copyright © 2017 Ludovic Courtès <ludo@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
@@ -65,6 +66,52 @@ is usually the formatter of \"man\" documentation pages.")
(license gpl3+)
(home-page "https://www.gnu.org/software/groff/")))
+(define-public groff-minimal
+ ;; Minimialist groff for use by man-db. Its closure size is less than half
+ ;; that of the full-blown groff.
+ (package
+ (inherit groff)
+ (name "groff-minimal")
+ (synopsis "Minimalist variant of Groff for use by man-db")
+ (outputs '("out"))
+
+ ;; Omit the DVI, PS, PDF, and HTML backends.
+ (inputs '())
+ (native-inputs `(("bison" ,bison)
+ ("perl" ,perl)))
+
+ (arguments
+ `(#:disallowed-references (,perl)
+
+ #:configure-flags '("--docdir=/tmp/trash/doc")
+
+ #:phases (modify-phases %standard-phases
+ (add-after 'install 'remove-non-essential-programs
+ (lambda* (#:key outputs #:allow-other-keys)
+ ;; Keep only the programs that man-db needs at run time,
+ ;; and make sure we don't pull in Perl.
+ (let ((out (assoc-ref outputs "out"))
+ (kept '("eqn" "neqn" "pic" "tbl" "refer"
+ "nroff" "groff" "troff" "grotty")))
+ (for-each (lambda (file)
+ (unless (member (basename file) kept)
+ (delete-file file)))
+ (find-files (string-append out "/bin")))
+
+ ;; Remove a bunch of unneeded Perl scripts.
+ (for-each delete-file (find-files out "\\.pl$"))
+ (for-each delete-file
+ (find-files out "BuildFoundries"))
+
+ ;; Remove ~3 MiB from share/groff/X.Y/font/devBACKEND
+ ;; corresponding to the unused backends.
+ (for-each delete-file-recursively
+ (find-files out "^dev(dvi|ps|pdf|html|lj4)$"
+ #:directories? #t))
+ #t))))
+
+ ,@(package-arguments groff)))))
+
;; There are no releases, so we take the latest commit.
(define-public roffit
(let ((commit "e5228388e3faf2b7f1ae5bd048ad46ed565304c6")