%global __brp_check_rpaths %{nil}
%global __requires_exclude ^libmpi
%global packname  hmmTensor
%global packver   0.1.0
%global rlibdir   /usr/local/lib/R/library

Name:             R-CRAN-%{packname}
Version:          0.1.0
Release:          1%{?dist}%{?buildtag}
Summary:          Hidden Markov Model by Matrix and Tensor Decomposition

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


BuildRequires:    R-devel >= 3.5.0
Requires:         R-core >= 3.5.0
BuildArch:        noarch
BuildRequires:    R-CRAN-rTensor 
BuildRequires:    R-CRAN-symTensor 
BuildRequires:    R-methods 
BuildRequires:    R-stats 
Requires:         R-CRAN-rTensor 
Requires:         R-CRAN-symTensor 
Requires:         R-methods 
Requires:         R-stats 

%description
Solves Hidden Markov Models (HMMs) via matrix and tensor decomposition.
Converts observation sequences to co-occurrence matrices/tensors and
applies Symmetric Non-negative Matrix Factorization (symNMF), Singular
Value Decomposition (SVD), CANDECOMP/PARAFAC (CP) decomposition, or
Tensor-Train (TT) decomposition to recover HMM parameters. Also provides
standard HMM algorithms (Forward, Backward, Viterbi, Baum-Welch) for
comparison. The spectral learning approach for HMMs is based on Hsu,
Kakade, and Zhang (2012) <doi:10.1016/j.jcss.2011.12.025>. The symNMF
method is described in Kuang, Yun, and Park (2015)
<doi:10.1007/s10898-014-0247-2>. The Tensor-Train decomposition is
described in Oseledets (2011) <doi:10.1137/090752286>.

%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}