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+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2012 Ludovic Courtès <ludo@gnu.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 compression)
+ #:use-module ((guix licenses)
+ #:renamer (symbol-prefix-proc 'license:))
+ #:use-module (guix packages)
+ #:use-module (guix download)
+ #:use-module (guix build-system gnu))
+
+(define-public zlib
+ (package
+ (name "zlib")
+ (version "1.2.7")
+ (source
+ (origin
+ (method url-fetch)
+ (uri (string-append "http://zlib.net/zlib-"
+ version ".tar.gz"))
+ (sha256
+ (base32
+ "1i96gsdvxqb6skp9a58bacf1wxamwi9m9pg4yn7cpf7g7239r77s"))))
+ (build-system gnu-build-system)
+ (arguments
+ `(#:phases (alist-replace
+ 'configure
+ (lambda* (#:key outputs #:allow-other-keys)
+ ;; Zlib's home-made `configure' doesn't fails when passed
+ ;; extra flags like `--enable-fast-install', so we need to
+ ;; invoke it with just what it understand.
+ (let ((out (assoc-ref outputs "out")))
+ (zero? (system* "./configure"
+ (string-append "--prefix=" out)))))
+ %standard-phases)))
+ (home-page "http://zlib.net/")
+ (synopsis "The zlib compression library")
+ (description
+ "zlib is designed to be a free, general-purpose, legally unencumbered --
+that is, not covered by any patents -- lossless data-compression library for
+use on virtually any computer hardware and operating system. The zlib data
+format is itself portable across platforms. Unlike the LZW compression method
+used in Unix compress(1) and in the GIF image format, the compression method
+currently used in zlib essentially never expands the data. (LZW can double or
+triple the file size in extreme cases.) zlib's memory footprint is also
+independent of the input data and can be reduced, if necessary, at some cost
+in compression.")
+ (license license:zlib)))
+
+(define-public gzip
+ (package
+ (name "gzip")
+ (version "1.5")
+ (source (origin
+ (method url-fetch)
+ (uri (string-append "mirror://gnu/gzip/gzip-"
+ version ".tar.gz"))
+ (sha256
+ (base32
+ "18rm80kar7n016g8bsyy1a3zk50i2826xdgs874yh64rzj7nxmdm"))))
+ (build-system gnu-build-system)
+ (synopsis "Gzip, the GNU zip compression program")
+ (arguments
+ ;; FIXME: The test suite wants `less', and optionally Perl.
+ '(#:tests? #f))
+ (description
+ "gzip (GNU zip) is a popular data compression program written by Jean-loup
+Gailly for the GNU project. Mark Adler wrote the decompression part.
+
+We developed this program as a replacement for compress because of the Unisys
+and IBM patents covering the LZW algorithm used by compress. These patents
+made it impossible for us to use compress, and we needed a replacement. The
+superior compression ratio of gzip is just a bonus.")
+ (license license:gpl3+)
+ (home-page "http://www.gnu.org/software/gzip/")))
+
+(define-public bzip2
+ (let ((fix-man-dir
+ ;; Move man pages to $out/share/.
+ '(lambda* (#:key outputs #:allow-other-keys)
+ (with-directory-excursion (assoc-ref outputs "out")
+ (mkdir "share")
+ (rename-file "man" "share"))))
+ (build-shared-lib
+ ;; Build a shared library.
+ '(lambda* (#:key inputs #:allow-other-keys)
+ (patch-makefile-SHELL "Makefile-libbz2_so")
+ (zero? (system* "make" "-f" "Makefile-libbz2_so"))))
+ (install-shared-lib
+ '(lambda* (#:key outputs #:allow-other-keys)
+ (let* ((out (assoc-ref outputs "out"))
+ (libdir (string-append out "/lib")))
+ (for-each (lambda (file)
+ (let ((base (basename file)))
+ (format #t "installing `~a' to `~a'~%"
+ base libdir)
+ (copy-file file
+ (string-append libdir "/" base))))
+ (find-files "." "^libbz2\\.so"))))))
+ (package
+ (name "bzip2")
+ (version "1.0.6")
+ (source (origin
+ (method url-fetch)
+ (uri (string-append "http://www.bzip.org/" version "/bzip2-"
+ version ".tar.gz"))
+ (sha256
+ (base32
+ "1kfrc7f0ja9fdn6j1y6yir6li818npy6217hvr3wzmnmzhs8z152"))))
+ (build-system gnu-build-system)
+ (arguments
+ `(#:modules ((guix build gnu-build-system)
+ (guix build utils)
+ (srfi srfi-1))
+ #:phases
+ (alist-cons-before
+ 'build 'build-shared-lib ,build-shared-lib
+ (alist-cons-after
+ 'install 'fix-man-dir ,fix-man-dir
+ (alist-cons-after
+ 'install 'install-shared-lib ,install-shared-lib
+ (alist-delete 'configure %standard-phases))))
+ #:make-flags (list (string-append "PREFIX="
+ (assoc-ref %outputs "out")))))
+ (synopsis "high-quality data compression program")
+ (description
+ "bzip2 is a freely available, patent free (see below), high-quality data
+compressor. It typically compresses files to within 10% to 15% of the best
+available techniques (the PPM family of statistical compressors), whilst
+being around twice as fast at compression and six times faster at
+decompression.")
+ (license (license:bsd-style "file://LICENSE"
+ "See LICENSE in the distribution."))
+ (home-page "http://www.bzip.org/"))))
+
+(define-public xz
+ (package
+ (name "xz")
+ (version "5.0.4")
+ (source (origin
+ (method url-fetch)
+ (uri (string-append "http://tukaani.org/xz/xz-" version
+ ".tar.gz"))
+ (sha256
+ (base32
+ "1dl35ca8fdss9z2d6y234gxh24ixq904xksizrjmjr5dimwhax6n"))))
+ (build-system gnu-build-system)
+ (synopsis
+ "XZ, general-purpose data compression software, successor of LZMA")
+ (description
+ "XZ Utils is free general-purpose data compression software with high
+compression ratio. XZ Utils were written for POSIX-like systems, but also
+work on some not-so-POSIX systems. XZ Utils are the successor to LZMA Utils.
+
+The core of the XZ Utils compression code is based on LZMA SDK, but it has
+been modified quite a lot to be suitable for XZ Utils. The primary
+compression algorithm is currently LZMA2, which is used inside the .xz
+container format. With typical files, XZ Utils create 30 % smaller output
+than gzip and 15 % smaller output than bzip2.")
+ (license '(license:gpl2+ license:lgpl2.1+)) ; bits of both
+ (home-page "http://tukaani.org/xz/")))
+
+(define-public lzo
+ (package
+ (name "lzo")
+ (version "2.06")
+ (source
+ (origin
+ (method url-fetch)
+ (uri (string-append "http://www.oberhumer.com/opensource/lzo/download/lzo-"
+ version ".tar.gz"))
+ (sha256
+ (base32
+ "0wryshs446s7cclrbjykyj766znhcpnr7s3cxy33ybfn6vwfcygz"))))
+ (build-system gnu-build-system)
+ (home-page "http://www.oberhumer.com/opensource/lzo")
+ (synopsis
+ "A data compresion library suitable for real-time data de-/compression")
+ (description
+ "LZO is a data compression library which is suitable for data
+de-/compression in real-time. This means it favours speed over
+compression ratio.
+
+LZO is written in ANSI C. Both the source code and the compressed data
+format are designed to be portable across platforms.")
+ (license license:gpl2+)))