Updated README + added package script

builder/package.opensuse-155

@@ -0,0 +1,100 @@
+#!/bin/bash
+
+if [[ ! -d /tmp/output/${OS_IDENTIFIER} ]]; then
+  mkdir -p "/tmp/output/${OS_IDENTIFIER}"
+fi
+
+# R 3.x requires PCRE1
+pcre_lib='pcre2-devel'
+if [[ "${R_VERSION}" =~ ^3 ]]; then
+  pcre_lib='pcre-devel'
+fi
+
+# Create post-install script required for OpenBLAS.
+#
+# On RHEL and SUSE, we link R against the internal shared BLAS to make the
+# R binaries more portable and allow users to switch BLAS implementations without
+# having to recompile R. We default to OpenBLAS, but users may prefer other implementations.
+# 
+# Binary packages built against the shared BLAS are also more portable and may be used
+# with the default R distributed by RHEL/SUSE, or other R installations using
+# shared BLAS and configured with a different BLAS (such as Microsoft R Open with MKL).
+# This is especially important for RSPM's binary packages.
+#
+# On Ubuntu/Debian, we link R against the external BLAS instead (--with-blas/--with-lapack),
+# as those distributions use the alternatives system to swap BLAS libraries at runtime.
+# The default R distributions on Ubuntu/Debian use the external BLAS, so we do as well
+# for portability.
+#
+# https://cran.r-project.org/doc/manuals/r-release/R-admin.html#Shared-BLAS
+cat <<EOF >> /post-install.sh
+mv ${R_INSTALL_PATH}/lib/R/lib/libRblas.so ${R_INSTALL_PATH}/lib/R/lib/libRblas.so.keep
+ln -s /usr/lib64/libopenblas.so ${R_INSTALL_PATH}/lib/R/lib/libRblas.so
+EOF
+
+# Create after-remove script to remove internal BLAS, which won't be cleaned up automatically.
+cat <<EOF >> /after-remove.sh
+if [ -d ${R_INSTALL_PATH} ]; then
+  rm -r ${R_INSTALL_PATH}
+fi
+EOF
+
+if [ "$(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:
+- fontconfig
+- gcc
+- gcc-c++
+- gcc-fortran
+- glibc-locale
+- gzip
+- icu.691-devel
+- libbz2-devel
+- libcairo2
+- libcurl-devel
+- libfreetype6
+- libgomp1
+- libjpeg62
+- libopenblas_pthreads-devel
+- libpango-1_0-0
+- libreadline7
+- libtiff5
+- make
+- ${pcre_lib}
+- tar
+- tcl
+- tk
+- unzip
+- which
+- xorg-x11
+- xorg-x11-fonts-100dpi
+- xorg-x11-fonts-75dpi
+- xz-devel
+- zip
+- zlib-devel
+contents:
+- src: ${R_INSTALL_PATH}
+  dst: ${R_INSTALL_PATH}
+scripts:
+  postinstall: /post-install.sh
+  postremove: /after-remove.sh
+EOF
+
+nfpm package \
+  -f /tmp/nfpm.yml \
+  -p rpm \
+  -t "/tmp/output/${OS_IDENTIFIER}"
+
+export PKG_FILE=$(ls /tmp/output/${OS_IDENTIFIER}/R-${R_VERSION}*.rpm | head -1)