diff --git a/.xz.metadata b/.xz.metadata
new file mode 100644
index 0000000..1674c20
--- /dev/null
+++ b/.xz.metadata
@@ -0,0 +1,2 @@
+bb0fd27570627e7316927619494568de3414402a SOURCES/xz-4.999.9beta.20100401git.tar.bz2
+b161f85b16cb86725022b8c58bce2c8228158852 SOURCES/xz-5.1.2alpha.tar.gz
diff --git a/README.md b/README.md
deleted file mode 100644
index 0e7897f..0000000
--- a/README.md
+++ /dev/null
@@ -1,5 +0,0 @@
-The master branch has no content
-
-Look at the c7 branch if you are working with CentOS-7, or the c4/c5/c6 branch for CentOS-4, 5 or 6
-
-If you find this file in a distro specific branch, it means that no content has been checked in yet
diff --git a/SOURCES/xz-5.1.2alpha-man-page-day.patch b/SOURCES/xz-5.1.2alpha-man-page-day.patch
new file mode 100644
index 0000000..1d15a59
--- /dev/null
+++ b/SOURCES/xz-5.1.2alpha-man-page-day.patch
@@ -0,0 +1,81 @@
+diff --git a/src/xz/message.c b/src/xz/message.c
+index abbd171..ce953ac 100644
+--- a/src/xz/message.c
++++ b/src/xz/message.c
+@@ -1110,7 +1110,8 @@ message_help(bool long_help)
+
+ puts(_(
+ " -z, --compress force compression\n"
+-" -d, --decompress force decompression\n"
++" -d, --decompress, --uncompress\n"
++" force decompression\n"
+ " -t, --test test compressed file integrity\n"
+ " -l, --list list information about .xz files"));
+
+@@ -1120,7 +1121,8 @@ message_help(bool long_help)
+ puts(_(
+ " -k, --keep keep (don't delete) input files\n"
+ " -f, --force force overwrite of output file and (de)compress links\n"
+-" -c, --stdout write to standard output and don't delete input files"));
++" -c, --stdout, --to-stdout\n"
++" write to standard output and don't delete input files"));
+
+ if (long_help) {
+ puts(_(
+@@ -1152,6 +1154,10 @@ message_help(bool long_help)
+ " -e, --extreme try to improve compression ratio by using more CPU time;\n"
+ " does not affect decompressor memory requirements"));
+
++ puts(_(
++" -T, --threads=NUM use at most NUM threads; the default is 1; set to 0\n"
++" to use the number of processor cores"));
++
+ if (long_help) {
+ // FIXME? Mention something about threading?
+ puts(_(
+@@ -1166,7 +1172,7 @@ message_help(bool long_help)
+ puts(_( // xgettext:no-c-format
+ " --memlimit-compress=LIMIT\n"
+ " --memlimit-decompress=LIMIT\n"
+-" -M, --memlimit=LIMIT\n"
++" -M, --memlimit=LIMIT, (old alias --memory=LIMIT)\n"
+ " set memory usage limit for compression, decompression,\n"
+ " or both; LIMIT is in bytes, % of RAM, or 0 for defaults"));
+
+diff --git a/src/xz/xz.1 b/src/xz/xz.1
+index 0368f05..e5da140 100644
+--- a/src/xz/xz.1
++++ b/src/xz/xz.1
+@@ -912,7 +912,7 @@ See
+ for possible ways to specify the
+ .IR limit .
+ .TP
+-\fB\-M\fR \fIlimit\fR, \fB\-\-memlimit=\fIlimit\fR, \fB\-\-memory=\fIlimit
++\fB\-M\fR \fIlimit\fR, \fB\-\-memlimit=\fIlimit\fR, (old alias \fB\-\-memory=\fIlimit\fR)
+ This is equivalent to specifying \fB\-\-memlimit\-compress=\fIlimit
+ \fB\-\-memlimit\-decompress=\fIlimit\fR.
+ .TP
+diff --git a/src/xzdec/xzdec.c b/src/xzdec/xzdec.c
+index b7830db..48ac1fe 100644
+--- a/src/xzdec/xzdec.c
++++ b/src/xzdec/xzdec.c
+@@ -64,13 +64,15 @@ help(void)
+ "Usage: %s [OPTION]... [FILE]...\n"
+ "Uncompress files in the ." TOOL_FORMAT " format to the standard output.\n"
+ "\n"
+-" -c, --stdout (ignored)\n"
+-" -d, --decompress (ignored)\n"
+-" -k, --keep (ignored)\n"
+ " -q, --quiet specify *twice* to suppress errors\n"
+-" -Q, --no-warn (ignored)\n"
+ " -h, --help display this help and exit\n"
+ " -V, --version display the version number and exit\n"
++" -c, --stdout, --to-stdout\n"
++" ignored, data are always written to standard output\n"
++" -d, --decompress, --uncompress\n"
++" ignored, only decompression is supported\n"
++" -k, --keep ignored, we never create/remove any files\n"
++" -Q, --no-warn ignored, we never use exit status 2\n"
+ "\n"
+ "With no FILE, or when FILE is -, read standard input.\n"
+ "\n"
diff --git a/SOURCES/xz-5.1.2alpha-xzgrep-and-h-option.patch b/SOURCES/xz-5.1.2alpha-xzgrep-and-h-option.patch
new file mode 100644
index 0000000..dfbdf35
--- /dev/null
+++ b/SOURCES/xz-5.1.2alpha-xzgrep-and-h-option.patch
@@ -0,0 +1,23 @@
+commit 5019413a055ce29e660dbbf15e02443cb5a26c59
+Author: Jeff Bastian <jbastian@redhat.com>
+AuthorDate: Wed Apr 3 13:59:17 2013 +0200
+Commit: Lasse Collin <lasse.collin@tukaani.org>
+CommitDate: Fri Apr 5 19:14:50 2013 +0300
+
+ xzgrep: make the '-h' option to be --no-filename equivalent
+
+ * src/scripts/xzgrep.in: Accept the '-h' option in argument parsing.
+
+diff --git a/src/scripts/xzgrep.in b/src/scripts/xzgrep.in
+index d8e9bb5..951266b 100644
+--- a/src/scripts/xzgrep.in
++++ b/src/scripts/xzgrep.in
+@@ -109,7 +109,7 @@ while test $# -ne 0; do
+ files_with_matches=1;;
+ (-L | --files-witho*)
+ files_without_matches=1;;
+- (--no-f*)
++ (-h | --no-f*)
+ no_filename=1;;
+ (-V | --v | --ve | --ver | --vers | --versi | --versio | --version)
+ echo "$version" || exit 2
diff --git a/SPECS/xz.spec b/SPECS/xz.spec
new file mode 100644
index 0000000..2b098aa
--- /dev/null
+++ b/SPECS/xz.spec
@@ -0,0 +1,258 @@
+%global compat_ver xz-4.999.9beta
+
+Summary: LZMA compression utilities
+Name: xz
+Version: 5.1.2
+Release: 5alpha%{?dist}
+License: LGPLv2+
+Group: Applications/File
+# official upstream release
+Source0: http://tukaani.org/%{name}/%{name}-%{version}alpha.tar.gz
+# source created as "make dist" in checked out GIT tree
+Source1: %{compat_ver}.20100401git.tar.bz2
+URL: http://tukaani.org/%{name}/
+BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
+Requires: %{name}-libs = %{version}-%{release}
+
+# partly upstream/partly not (yet?)
+# ~> proposal: http://www.mail-archive.com/xz-devel@tukaani.org/msg00153.html
+# ~> #948533
+Patch0: xz-5.1.2alpha-man-page-day.patch
+
+# fix 'xzgrep -h' to behave as expected
+# ~> upstream (5019413a0)
+# ~> #850898
+Patch1: xz-5.1.2alpha-xzgrep-and-h-option.patch
+
+%description
+XZ Utils are an attempt to make LZMA compression easy to use on free (as in
+freedom) operating systems. This is achieved by providing tools and libraries
+which are similar to use than the equivalents of the most popular existing
+compression algorithms.
+
+LZMA is a general purpose compression algorithm designed by Igor Pavlov as
+part of 7-Zip. It provides high compression ratio while keeping the
+decompression speed fast.
+
+%package libs
+Summary: Libraries for decoding LZMA compression
+Group: System Environment/Libraries
+License: LGPLv2+
+
+%description libs
+Libraries for decoding files compressed with LZMA or XZ utils.
+
+%package compat-libs
+Summary: Compatibility libraries for decoding LZMA compression
+Group: System Environment/Libraries
+License: LGPLv2+
+
+%description compat-libs
+Compatibility libraries for decoding files compressed with LZMA or XZ utils.
+This particular package ships libraries from %{compat_ver} as of 1st of April 2010.
+
+%package devel
+Summary: Devel libraries & headers for liblzma
+Group: Development/Libraries
+License: LGPLv2+
+Requires: %{name}-libs = %{version}-%{release}
+Requires: pkgconfig
+
+%description devel
+Devel libraries and headers for liblzma.
+
+%package lzma-compat
+Summary: Older LZMA format compatibility binaries
+Group: Development/Libraries
+# lz{grep,diff,more} are GPLv2+. Other binaries are LGPLv2+
+License: GPLv2+ and LGPLv2+
+Requires: %{name} = %{version}-%{release}
+Obsoletes: lzma < %{version}
+Provides: lzma = %{version}
+
+%description lzma-compat
+The lzma-compat package contains compatibility links for older
+commands that deal with the older LZMA format.
+
+%prep
+%setup -q -a1 -n %{name}-%{version}alpha
+%patch0 -p1 -b .man-page-day
+%patch1 -p1 -b .xzgrep-and-h-option
+
+for i in `find . -name config.sub`; do
+ perl -pi -e "s/ppc64-\*/ppc64-\* \| ppc64p7-\*/" $i
+done
+
+%build
+CFLAGS="%{optflags} -D_FILE_OFFSET_BITS=64" \
+CXXFLAGS="%{optflags} -D_FILE_OFFSET_BITS=64" \
+%configure --disable-static
+sed -i 's|^hardcode_libdir_flag_spec=.*|hardcode_libdir_flag_spec=""|g' libtool
+sed -i 's|^runpath_var=LD_RUN_PATH|runpath_var=DIE_RPATH_DIE|g' libtool
+make %{?_smp_mflags}
+
+pushd %{compat_ver}
+%configure --disable-static
+sed -i 's|^hardcode_libdir_flag_spec=.*|hardcode_libdir_flag_spec=""|g' libtool
+sed -i 's|^runpath_var=LD_RUN_PATH|runpath_var=DIE_RPATH_DIE|g' libtool
+make %{?_smp_mflags}
+popd
+
+%install
+rm -rf %{buildroot}
+make install DESTDIR=%{buildroot} INSTALL="%{__install} -p"
+rm -f %{buildroot}%{_libdir}/*.a
+rm -f %{buildroot}%{_libdir}/*.la
+rm -rf %{buildroot}%{_docdir}/%{name}
+rm -rf %{buildroot}%{_datadir}/locale
+cp -r %{compat_ver}/src/liblzma/.libs/liblzma.so.0* %{buildroot}%{_libdir}
+
+%check
+LD_LIBRARY_PATH=$PWD/src/liblzma/.libs make check
+
+%clean
+rm -rf %{buildroot}
+
+%post libs -p /sbin/ldconfig
+
+%postun libs -p /sbin/ldconfig
+
+%post compat-libs -p /sbin/ldconfig
+
+%postun compat-libs -p /sbin/ldconfig
+
+%files
+%defattr(-,root,root,-)
+%doc AUTHORS COPYING* ChangeLog NEWS README THANKS TODO
+%{_bindir}/*xz*
+%{_mandir}/man1/*xz*
+
+%files libs
+%defattr(-,root,root,-)
+%doc COPYING*
+%{_libdir}/lib*.so.5*
+
+%files compat-libs
+%defattr(-,root,root,-)
+%doc COPYING*
+%{_libdir}/lib*.so.0*
+
+%files devel
+%defattr(-,root,root,-)
+%dir %{_includedir}/lzma
+%{_includedir}/lzma/*.h
+%{_includedir}/lzma.h
+%{_libdir}/*.so
+%{_libdir}/pkgconfig/liblzma.pc
+
+%files lzma-compat
+%defattr(-,root,root,-)
+%{_bindir}/*lz*
+%{_mandir}/man1/*lz*
+
+%changelog
+* Tue Apr 09 2013 Pavel Raiskup <praiskup@redhat.com> - 5.1.2-5alpha
+- fix manual page inconsistencies with help output (private #948533)
+- enable/fix the 'xzgrep -h' (private #850898)
+
+* Thu Feb 21 2013 Karsten Hopp <karsten@redhat.com> 5.1.2-4alpha
+- add support for ppc64p7 arch (Power7 optimized)
+
+* Fri Feb 15 2013 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 5.1.2-3alpha
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_19_Mass_Rebuild
+
+* Sun Jul 22 2012 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 5.1.2-2alpha
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_18_Mass_Rebuild
+
+* Thu Jul 05 2012 Jindrich Novy <jnovy@redhat.com> 5.1.2alpha-1
+- update to 5.1.2alpha
+
+* Sat Jan 14 2012 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 5.1.1-2alpha
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_17_Mass_Rebuild
+
+* Sun Oct 16 2011 Jindrich Novy <jnovy@redhat.com> 5.1.1alpha-1
+- update to 5.1.1alpha
+
+* Mon Jun 20 2011 Jindrich Novy <jnovy@redhat.com> 5.0.3-2
+- better to have upstream tarballs in different formats than XZ
+ to allow bootstrapping (#714765)
+
+* Mon May 23 2011 Jindrich Novy <jnovy@redhat.com> 5.0.3-1
+- update to 5.0.3
+
+* Mon Apr 04 2011 Jindrich Novy <jnovy@redhat.com> 5.0.2-1
+- update to 5.0.2
+
+* Tue Feb 08 2011 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 5.0.1-2
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_15_Mass_Rebuild
+
+* Sat Jan 29 2011 Jindrich Novy <jnovy@redhat.com> 5.0.1-1
+- update to 5.0.1
+
+* Tue Oct 26 2010 Jindrich Novy <jnovy@redhat.com> 5.0.0-4
+- call ldconfig for compat-libs and fix description
+
+* Mon Oct 25 2010 Jindrich Novy <jnovy@redhat.com> 5.0.0-3
+- introduce compat-libs subpackage with older soname to
+ resolve problems with soname bump and for packages requiring
+ older xz-4.999.9beta
+
+* Mon Oct 25 2010 Jindrich Novy <jnovy@redhat.com> 5.0.0-2
+- rebuild
+
+* Mon Oct 25 2010 Jindrich Novy <jnovy@redhat.com> 5.0.0-1
+- update to the new upstream release
+
+* Sat Oct 16 2010 Jindrich Novy <jnovy@redhat.com> 4.999.9-0.3.beta.212.gacbc
+- update to latest git snapshot
+
+* Thu Apr 01 2010 Jindrich Novy <jnovy@redhat.com> 4.999.9-0.2.20100401.beta
+- sync with upstream (#578925)
+
+* Thu Feb 18 2010 Jindrich Novy <jnovy@redhat.com> 4.999.9-0.2.20091007.beta
+- move xz man pages to main package, leave lzma ones where they belong (#566484)
+
+* Wed Oct 07 2009 Jindrich Novy <jnovy@redhat.com> 4.999.9-0.1.20091007.beta
+- sync with upstream again
+
+* Fri Oct 02 2009 Jindrich Novy <jnovy@redhat.com> 4.999.9-0.1.20091002.beta
+- sync with upstream to generate the same archives on machines with different
+ endianess
+
+* Fri Aug 28 2009 Jindrich Novy <jnovy@redhat.com> 4.999.9-0.1.beta
+- update to 4.999.9beta
+
+* Mon Aug 17 2009 Jindrich Novy <jnovy@redhat.com> 4.999.8-0.10.beta.20090817git
+- sync with upstream because of #517806
+
+* Tue Aug 04 2009 Jindrich Novy <jnovy@redhat.com> 4.999.8-0.9.beta.20090804git
+- update to the latest GIT snapshot
+
+* Mon Jul 27 2009 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 4.999.8-0.8.beta
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_12_Mass_Rebuild
+
+* Fri Jul 17 2009 Bill Nottingham <notting@redhat.com> 4.999.8-0.7.beta
+- tweak summary
+- add %%check section (<tibbs@math.uh.edu>)
+
+* Thu Jul 09 2009 Bill Nottingham <notting@redhat.com> 4.999.8-0.6.beta
+- fix release versioning to match guidelines
+- fix up lzma-compat summary/description
+- tweak licensing
+
+* Mon Jun 22 2009 Jindrich Novy <jnovy@redhat.com> 4.999.8beta-0.5
+- introduce lzma-compat subpackage
+
+* Fri Jun 19 2009 Jindrich Novy <jnovy@redhat.com> 4.999.8beta-0.4
+- try to not to conflict with lzma
+
+* Thu Jun 18 2009 Jindrich Novy <jnovy@redhat.com> 4.999.8beta-0.3
+- obsolete but don't provide lzma, they are largely incompatible
+- put beta to Release
+
+* Wed Jun 17 2009 Jindrich Novy <jnovy@redhat.com> 4.999.8beta-0.2
+- obsolete old lzma
+- add Requires: pkgconfig
+
+* Tue Jun 16 2009 Jindrich Novy <jnovy@redhat.com> 4.999.8beta-0.1
+- package XZ Utils, based on LZMA Utils packaged by Per Patrice Bouchand