Add spec file for building RPM package

The version is set to 0 as we haven't release the first version yet.

golang-github-osbuild-composer.spec

@@ -0,0 +1,81 @@
+%bcond_without check
+
+%global goipath         github.com/osbuild/osbuild-composer
+
+Version:        0
+
+%gometa
+
+%global common_description %{expand:
+An image building service based on osbuild.
+It is inspired by lorax-composer and exposes the same API.
+As such, it is a drop-in replacement.
+}
+
+Name:           %{goname}
+Release:        1%{?dist}
+Summary:        An image building service based on osbuild.
+
+# Upstream license specification: Apache-2.0
+License:        ASL 2.0
+URL:            %{gourl}
+Source0:        %{gosource}
+
+BuildRequires:  systemd
+BuildRequires:  golang(github.com/coreos/go-systemd/activation)
+BuildRequires:  golang(github.com/google/uuid)
+BuildRequires:  golang(github.com/julienschmidt/httprouter)
+
+Requires: systemd
+Requires: osbuild
+
+%description
+%{common_description}
+
+%prep
+%forgeautosetup -p1
+
+%build
+%gobuildroot
+for cmd in cmd/* ; do
+  %gobuild -o _bin/$(basename $cmd) %{goipath}/$cmd
+done
+
+
+%install
+install -m 0755 -vd                                         %{buildroot}%{_prefix}/lib/osbuild-composer
+install -m 0755 -vp _bin/*                                  %{buildroot}%{_prefix}/lib/osbuild-composer/
+install -m 0644 -vp dnf-json                                %{buildroot}%{_prefix}/lib/osbuild-composer/
+
+install -m 0755 -vd                                         %{buildroot}%{_unitdir}
+install -m 0644 -vp distribution/*.{service,socket}         %{buildroot}%{_unitdir}/
+
+install -m 0755 -vd                                         %{buildroot}%{_sysusersdir}
+install -m 0644 -vp distribution/osbuild-composer.conf      %{buildroot}%{_sysusersdir}/
+
+install -m 0755 -vd                                         %{buildroot}%{_localstatedir}/cache/osbuild-composer/dnf-cache
+
+%if %{with check}
+%check
+
+# turn off modules
+export GO111MODULE=off
+
+# fix GOPATH, so that tests can found deps
+export GOPATH=$(pwd)/_build:%{gopath}
+
+%gotest ./...
+
+%endif
+
+%files
+%license LICENSE
+%doc README.md
+%{_prefix}/lib/osbuild-composer/*
+%{_unitdir}/*.{service,socket}
+%{_sysusersdir}/osbuild-composer.conf
+
+%changelog
+* Fri Oct 25 13:23:00 CEST 2019 Ondřej Budai <obudai@redhat.com> - 0-1
+- CHANGE ME, this is not official Fedora release!
+