barrier.spec in place: rpmbuild -ta should work

barrier.spec

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+Name: barrier
+Version: 2.0.0
+#Version: 2.0.0-RC2 ###FIXME can't have a dash - in the version string
+Summary: Keyboard and mouse sharing solution
+Group: Applications/Productivity
+URL: https://github.com/debauchee/barrier/
+Source: https://github.com/debauchee/barrier/archive/v2.0.0-RC2.tar.gz
+# workaround the git versionning and set to Release instead of the default Debug
+Source1: build_env.sh
+Vendor: Debauchee ### FIXME ###
+Packager: Tru Huynh <tru@pasteur.fr>
+License: GPLv2
+Release: 1%{?dist}
+
+# at least for CentOS-7 and CentOS-6
+BuildRequires: git cmake3 make gcc gcc-c++ curl-devel  openssl-devel
+BuildRequires: qt5-qtbase-devel
+BuildRequires: avahi-compat-libdns_sd-devel
+BuildREquires: libXtst-devel libXinerama-devel libICE-devel libXrandr-devel
+
+# possible issue here for cmake: on CentOS-7, cmake is cmake 2.x and barrier needs cmake 3.x
+# which is available from EPEL as cmake3, that might not be the case for other RPMS based distro
+
+# CXX14
+%if 0%{?rhel} == 6
+BuildRequires: centos-release-scl-rh devtoolset-3-gcc-c++.x86_64
+%endif
+
+%description
+Barrier allows you to share one mouse and keyboard between multiple computers.
+Work seamlessly across Windows, macOS and Linux.
+
+%prep
+%setup -n %{name}-2.0.0-RC2
+
+%build
+cp %{SOURCE1} .
+
+%if 0%{?rhel} == 6
+scl enable devtoolset-3 ./clean_build.sh 
+%endif
+
+%if 0%{?rhel} == 7
+./clean_build.sh 
+%endif
+# maybe need a default if/else for non rhel target :P
+
+%install
+# no make install, so manual install
+%{__mkdir} -p %{buildroot}%{_bindir} %{buildroot}%{_datarootdir}/applications %{buildroot}%{_datarootdir}/icons/hicolor/scalable/apps
+%{__install} -t %{buildroot}%{_datarootdir}/applications res/barrier.desktop
+%{__install} -t %{buildroot}%{_datarootdir}/icons/hicolor/scalable/apps res/barrier.svg
+%{__install} -t %{buildroot}%{_bindir} build/bin/{barrier,barrierc,barriers,barrierd,syntool}
+
+%files
+%defattr(755,root,root,-)
+%{_bindir}/barrier
+%{_bindir}/barrierc
+%{_bindir}/barriers
+%{_bindir}/barrierd
+%{_bindir}/syntool
+%attr(644,-,-) %{_datarootdir}/applications/barrier.desktop
+%attr(644,-,-) %{_datarootdir}/icons/hicolor/scalable/apps/barrier.svg
+
+%changelog
+* Fri Mar  9 2018 Tru Huynh <tru@pasteur.fr> - barrier 2.0.0-1
+- Initial rpm package for barrier

docker/CentOS-7-git-builder/Dockerfile

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+FROM centos:centos7
+
+RUN yum -y update && yum -y upgrade
+RUN yum -y install epel-release
+RUN yum -y install git cmake3 make qt5-qtbase-devel gcc \
+ avahi-compat-libdns_sd-devel gcc-c++ curl-devel \
+ openssl-devel \
+ libXtst-devel libXinerama-devel libICE-devel libXrandr-devel
+
+RUN git clone https://github.com/debauchee/barrier/
+RUN cd barrier && ./clean_build.sh | tee clean_build.log && tar czvf build.tgz build clean_build.log