%{!?luaver: %global luaver %(lua -e "print(string.sub(_VERSION, 5))" || echo 0)}
%global luapkgdir %{_datadir}/lua/%{luaver}
%global lualibdir %{_libdir}/lua/%{luaver}

%global luacompatver 5.1
%global luacompatpkgdir %{_datadir}/lua/%{luacompatver}
%global luacompatlibdir %{_libdir}/lua/%{luacompatver}

%if 0%{?fedora} || 0%{?rhel} > 7
%global lualib lua-%{luacompatver}
%else
%global lualib lua
%endif

Name:           lua-compat53
Version:        0.7
Release:        1%{?dist}
Summary:        Compatibility module providing Lua-5.3-style APIs for Lua %{luacompatver}

License:        MIT
URL:            https://github.com/keplerproject/lua-compat-5.3
Source0:        https://github.com/keplerproject/lua-compat-5.3/archive/v%{version}/%{name}-%{version}.tar.gz

BuildRequires:  gcc
BuildRequires:  pkgconfig
%if 0%{?fedora} || 0%{?rhel} > 7
BuildRequires:  compat-lua-devel >= %{luacompatver}
%else
BuildRequires:  lua-devel >= %{luaver}
%endif

%if 0%{?rhel} == 7
Requires:       lua >= %{luaver}
%endif

%description
This is a small module that aims to make it easier to write code in a
Lua-5.3-style that is compatible with Lua 5.1, Lua 5.2, and Lua 5.3. This does
not make Lua 5.2 (or even Lua 5.1) entirely compatible with Lua 5.3, but it
brings the API closer to that of Lua 5.3.

%if 0%{?fedora} || 0%{?rhel} > 7
%package -n compat-%{name}
Summary:        Compatibility module providing Lua-5.3-style APIs for Lua %{luacompatver}
Requires:       lua(abi) = %{luacompatver}

%description -n compat-%{name}
This is a small module that aims to make it easier to write code in a
Lua-5.3-style that is compatible with Lua 5.1, Lua 5.2, and Lua 5.3. This does
not make Lua 5.2 (or even Lua 5.1) entirely compatible with Lua 5.3, but it
brings the API closer to that of Lua 5.3.
%endif

%prep
%setup -q -n lua-compat-5.3-%{version}

%build
CFLAGS="%{optflags} -fPIC $(pkg-config --cflags %{lualib})"
LDFLAGS="%{build_ldflags} $(pkg-config --libs %{lualib})"

gcc $CFLAGS -c lutf8lib.c -o lutf8lib.o
gcc $CFLAGS -c lstrlib.c -o lstrlib.o
gcc $CFLAGS -c ltablib.c -o ltablib.o
gcc -shared $LDFLAGS -o utf8.so lutf8lib.o
gcc -shared $LDFLAGS -o string.so lstrlib.o
gcc -shared $LDFLAGS -o table.so ltablib.o

%install
%if 0%{?fedora} || 0%{?rhel} > 7
PKGDIR=%{buildroot}/%{luacompatpkgdir}
LIBDIR=%{buildroot}/%{luacompatlibdir}
%else
PKGDIR=%{buildroot}/%{luapkgdir}
LIBDIR=%{buildroot}/%{lualibdir}
# NOTE: epel7 install command doesn't propely create dir when combining -D -t
mkdir -p "$PKGDIR/compat53"
mkdir -p "$LIBDIR/compat53"
%endif

install -d -m 0755 "$PKGDIR/compat53"
install -d -m 0755 "$LIBDIR/compat53"
install -p -m 0644 compat53/{init,module}.lua -t "$PKGDIR/compat53/"
install -p -m 0755 {utf8,string,table}.so -t "$LIBDIR/compat53/"

%if 0%{?rhel} == 7
%files
%license LICENSE
%doc README.md
%{luapkgdir}/compat53
%{lualibdir}/compat53
%endif

%if 0%{?fedora} || 0%{?rhel} > 7
%files -n compat-%{name}
%license LICENSE
%doc README.md
%{luacompatpkgdir}/compat53
%{luacompatlibdir}/compat53
%endif

%changelog
* Wed Apr 03 2019 Tomas Krizek <tomas.krizek@nic.cz> - 0.7-1
- Initial package for Fedora 28+ and EPEL 7