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+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2014 Eric Bavier <bavier@member.fsf.org>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (gnu packages debug)
+ #:use-module (guix packages)
+ #:use-module (guix licenses)
+ #:use-module (guix download)
+ #:use-module (guix build-system gnu)
+ #:use-module (gnu packages perl))
+
+(define-public delta
+ (package
+ (name "delta")
+ (version "2006.08.03")
+ (source
+ (origin
+ (method url-fetch)
+ (uri (list
+ (string-append "http://ftp.de.debian.org/debian/pool/main/d/delta/"
+ "delta_" version ".orig.tar.gz")
+ ;; This uri seems to send guix download into an infinite loop
+ (string-append "http://delta.tigris.org/files/documents/3103/"
+ "33566/delta-" version ".tar.gz")))
+ (sha256
+ (base32
+ "184wh35pf2ddx97319s6sgkzpz48xxkbwzcjpycv009bm53lh61q"))))
+ (build-system gnu-build-system)
+ (inputs ;Installed programs are perl scripts
+ `(("perl" ,perl)))
+ (arguments
+ `(#:phases
+ (alist-replace
+ 'install
+ (lambda* (#:key outputs #:allow-other-keys)
+ ;; Makefile contains no install target
+ (let* ((out (assoc-ref outputs "out"))
+ (bin (string-append out "/bin"))
+ (doc (string-append out "/share/doc/delta-" ,version)))
+ (begin
+ (mkdir-p bin)
+ (mkdir-p doc)
+ (for-each (lambda (h)
+ (copy-file h (string-append doc "/" (basename h))))
+ `("License.txt" ,@(find-files "www" ".*\\.html")))
+ (for-each (lambda (b)
+ (copy-file b (string-append bin "/" b)))
+ `("delta" "multidelta" "topformflat")))))
+ (alist-delete 'configure %standard-phases))))
+ (home-page "http://delta.tigris.org/")
+ (synopsis "Heuristical file minimizer")
+ (description
+ "Delta assists you in minimizing \"interesting\" files subject to a test
+of their interestingness. A common such situation is when attempting to
+isolate a small failure-inducing substring of a large input that causes your
+program to exhibit a bug.")
+ ;; See License.txt, which is a bsd-3 license, despite the project's
+ ;; home-page pointing to a bsd-2 license.
+ (license bsd-3)))