Merge branch '14-xz-module' into 'master'

Resolve "xz module"

Closes #14

See merge request Pmodules/buildblocks!14

Tools/xz/build

@@ -0,0 +1,26 @@
+#!/usr/bin/env modbuild
+
+pbuild::add_to_group 'Tools'
+
+pbuild::set_download_url \
+        "https://sourceforge.net/projects/lzmautils/files/$P-${V_PKG}.tar.gz"
+
+pbuild::set_sha256sum 'xz-5.2.4.tar.gz:b512f3b726d3b37b6dc4c8570e137b9311e7552e8ccbab4d39d47ce5f4177145'
+pbuild::install_docfiles \
+	AUTHORS \
+	COPYING \
+	COPYING.GPLv2 \
+	COPYING.GPLv3 \
+	COPYING.LGPLv2.1 \
+	ChangeLog \
+	NEWS \
+	PACKAGERS \
+	README \
+	THANKS \
+	TODO
+
+# Local Variables:
+# mode: sh
+# sh-basic-offset: 8
+# tab-width: 8
+# End:

Tools/xz/files/variants.macos10.14

@@ -0,0 +1 @@
+xz/5.2.4	stable

Tools/xz/files/variants.rhel6

@@ -0,0 +1 @@
+xz/5.2.4	stable

Tools/xz/modulefile

@@ -0,0 +1,34 @@
+#%Pmodule
+
+module-whatis		"free general-purpose data compression software"
+module-url		"https://tukaani.org/xz/"
+module-license		""
+module-maintainer	"Achim Gsell <achim.gsell@psi.ch>"
+
+module-help		"
+XZ Utils is free general-purpose data compression software with a 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.
+
+XZ Utils consist of several components:
+* liblzma is a compression library with an API similar to that of zlib.
+* xz is a command line tool with syntax similar to that of gzip.
+* xzdec is a decompression-only tool smaller than the full-featured xz
+  tool.
+* A set of shell scripts (xzgrep, xzdiff, etc.) have been adapted from
+  gzip to ease viewing, grepping, and comparing compressed files.
+* Emulation of command line tools of LZMA Utils eases transition from
+  LZMA Utils to XZ Utils.
+
+While liblzma has a zlib-like API, liblzma doesn't include any file I/O
+functions. A separate I/O library is planned, which would abstract
+handling of .gz, .bz2, and .xz files with an easy to use API.
+"
+