%global __brp_check_rpaths %{nil}
%global __requires_exclude ^libmpi
%global packname  einops
%global packver   0.2.1
%global rlibdir   /usr/local/lib/R/library

Name:             R-CRAN-%{packname}
Version:          0.2.1
Release:          1%{?dist}%{?buildtag}
Summary:          Flexible, Powerful, and Readable Tensor Operations

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


BuildRequires:    R-devel >= 3.5
Requires:         R-core >= 3.5
BuildArch:        noarch
BuildRequires:    R-CRAN-assertthat 
BuildRequires:    R-CRAN-FastUtils 
BuildRequires:    R-CRAN-glue 
BuildRequires:    R-CRAN-magrittr 
BuildRequires:    R-CRAN-r2r 
BuildRequires:    R-CRAN-R6 
BuildRequires:    R-CRAN-roperators 
Requires:         R-CRAN-assertthat 
Requires:         R-CRAN-FastUtils 
Requires:         R-CRAN-glue 
Requires:         R-CRAN-magrittr 
Requires:         R-CRAN-r2r 
Requires:         R-CRAN-R6 
Requires:         R-CRAN-roperators 

%description
Perform tensor operations using a concise yet expressive syntax inspired
by the Python library of the same name. Reshape, rearrange, and combine
multidimensional arrays for scientific computing, machine learning, and
data analysis. Einops simplifies complex manipulations, making code more
maintainable and intuitive. The original implementation is demonstrated in
Rogozhnikov (2022) <https://openreview.net/forum?id=oapKSVM2bcj>.

%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}