#!/bin/bash

if [[ ! -d /tmp/output/${OS_IDENTIFIER} ]]; then
  mkdir -p "/tmp/output/${OS_IDENTIFIER}"
fi

# R 4.5.0 and later require libzstd (with headers to link against libR)
zstd_libs='# - libzstd-devel'
if grep -q '^LIBS *=.*[-]lzstd' ${R_INSTALL_PATH}/lib/R/etc/Makeconf; then
    zstd_libs='- libzstd-devel'
fi

# Create postremove script to remove empty directories, as nFPM doesn't include them in the RPM files.
cat <<EOF >> /after-remove.sh
if [ -d ${R_INSTALL_PATH} ]; then
  rm -r ${R_INSTALL_PATH}
fi
EOF

scripts="scripts:
  postremove: /after-remove.sh
"

if [ "$(arch)" == "aarch64" ]; then echo arm64; else echo amd64; fi > /tmp/arch

cat <<EOF > /tmp/nfpm.yml
name: R-${R_VERSION}
version: 1
version_schema: none
arch: $(cat /tmp/arch)
release: 1
maintainer: Posit Software, PBC <https://github.com/rstudio/r-builds>
description: |
  GNU R statistical computation and graphics system
vendor: Posit Software, PBC
homepage: https://www.r-project.org
license: GPLv2+
depends:
- bzip2-devel
- gcc
- gcc-c++
- gcc-gfortran
- libcurl-devel
- libicu-devel
- libSM
- libtiff
- libXmu
- libXt
${zstd_libs}
- make
- flexiblas-devel
- pango
- pcre2-devel
- tcl
- tk
- unzip
- which
- xz-devel
- zip
- zlib-devel
contents:
- src: ${R_INSTALL_PATH}
  dst: ${R_INSTALL_PATH}
${scripts}
EOF

nfpm package \
  -f /tmp/nfpm.yml \
  -p rpm \
  -t "/tmp/output/${OS_IDENTIFIER}"

export PKG_FILE=$(ls /tmp/output/${OS_IDENTIFIER}/R-${R_VERSION}*.rpm | head -1)