%global __brp_check_rpaths %{nil}
%global __requires_exclude ^libmpi
%global packname  dqrng
%global packver   0.4.1
%global rlibdir   /usr/local/lib/R/library

Name:             R-CRAN-%{packname}
Version:          0.4.1
Release:          1%{?dist}%{?buildtag}
Summary:          Fast Pseudo Random Number Generators

License:          AGPL-3
URL:              https://cran.r-project.org/package=%{packname}
Source0:          %{url}&version=%{packver}#/%{packname}_%{packver}.tar.gz


BuildRequires:    R-devel >= 3.5.0
Requires:         R-core >= 3.5.0
BuildRequires:    R-CRAN-sitmo >= 2.0.0
BuildRequires:    R-CRAN-BH >= 1.64.0.1
BuildRequires:    R-CRAN-Rcpp >= 0.12.16
Requires:         R-CRAN-Rcpp >= 0.12.16

%description
Several fast random number generators are provided as C++ header only
libraries: The PCG family by O'Neill (2014
<https://www.cs.hmc.edu/tr/hmc-cs-2014-0905.pdf>) as well as the Xoroshiro
/ Xoshiro family by Blackman and Vigna (2021 <doi:10.1145/3460772>). In
addition fast functions for generating random numbers according to a
uniform, normal and exponential distribution are included. The latter two
use the Ziggurat algorithm originally proposed by Marsaglia and Tsang
(2000, <doi:10.18637/jss.v005.i08>). The fast sampling methods support
unweighted sampling both with and without replacement. These functions are
exported to R and as a C++ interface and are enabled for use with the
default 64 bit generator from the PCG family, Xoroshiro128+/++/** and
Xoshiro256+/++/** as well as the 64 bit version of the 20 rounds Threefry
engine (Salmon et al., 2011, <doi:10.1145/2063384.2063405>) as provided by
the package 'sitmo'.

%prep
%setup -q -c -n %{packname}

# fix end of executable files
find -type f -executable -exec grep -Iq . {} \; -exec sed -i -e '$a\' {} \;
# prevent binary stripping
[ -d %{packname}/src ] && find %{packname}/src -type f -exec \
  sed -i 's@/usr/bin/strip@/usr/bin/true@g' {} \; || true
[ -d %{packname}/src ] && find %{packname}/src/Make* -type f -exec \
  sed -i 's@-g0@@g' {} \; || true
# don't allow local prefix in executable scripts
find -type f -executable -exec sed -Ei 's@#!( )*/usr/local/bin@#!/usr/bin@g' {} \;

%build

%install

mkdir -p %{buildroot}%{rlibdir}
%{_bindir}/R CMD INSTALL -l %{buildroot}%{rlibdir} %{packname}
test -d %{packname}/src && (cd %{packname}/src; rm -f *.o *.so)
rm -f %{buildroot}%{rlibdir}/R.css
# remove buildroot from installed files
find %{buildroot}%{rlibdir} -type f -exec sed -i "s@%{buildroot}@@g" {} \;

%files
%{rlibdir}/%{packname}