%global __brp_check_rpaths %{nil}
%global __requires_exclude ^libmpi
%global packname  ucminfcpp
%global packver   1.0.0
%global rlibdir   /usr/local/lib/R/library

Name:             R-CRAN-%{packname}
Version:          1.0.0
Release:          1%{?dist}%{?buildtag}
Summary:          'C++' Reimplementation of the 'ucminf' Unconstrained Nonlinear Optimizer

License:          GPL (>= 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-Rcpp >= 1.1.0
Requires:         R-CRAN-Rcpp >= 1.1.0

%description
A modern 'C++17/ reimplementation of the 'UCMINF/ algorithm for
unconstrained nonlinear optimization (Nielsen and Mortensen, 2011,
<doi:10.32614/CRAN.package.ucminf>), offering full API compatibility with
the original 'ucminf' R package but developed independently. The optimizer
core has been rewritten in 'C' with a modern header-only 'C++17'
interface, zero-allocation line search, and an 'Rcpp' interface. The goal
is numerical equivalence with improved performance, reproducibility, and
extensibility. Includes extensive test coverage, performance regression
tests, and compatibility checks against 'ucminf'. This package is not
affiliated with the original maintainers but acknowledges their authorship
of the algorithm and the original R interface.

%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}