Replace fpm with nfpm for the newest platforms

fpm has had multiple Ruby gem dependency issues, and nfpm has better support
for code signing if we wanted to do that in the future. The rest of the
platforms may be migrated to nfpm later.

builder/package.rhel-9

@@ -1,5 +1,7 @@
-if [[ ! -d /tmp/output/rhel-9 ]]; then
-  mkdir -p /tmp/output/rhel-9
+#!/bin/bash
+
+if [[ ! -d /tmp/output/${OS_IDENTIFIER} ]]; then
+  mkdir -p "/tmp/output/${OS_IDENTIFIER}"
 fi
 
 # R 3.x requires PCRE1
@@ -37,40 +39,50 @@ if [ -d /opt/R/${R_VERSION} ]; then
 fi
 EOF
 
-fpm \
-  -s dir \
-  -t rpm \
-  -v 1 \
-  -n "R-${R_VERSION}" \
-  --vendor "RStudio, PBC" \
-  --url "https://www.r-project.org" \
-  --description "GNU R statistical computation and graphics system" \
-  --maintainer "RStudio, PBC <https://github.com/rstudio/r-builds>" \
-  --license "GPLv2+" \
-  --after-install /post-install.sh \
-  --after-remove /after-remove.sh \
-  -p /tmp/output/rhel-9/ \
-  -d bzip2-devel \
-  -d gcc \
-  -d gcc-c++ \
-  -d gcc-gfortran \
-  -d libcurl-devel \
-  -d libicu-devel \
-  -d libSM \
-  -d libtiff \
-  -d libXmu \
-  -d libXt \
-  -d make \
-  -d openblas-devel \
-  -d pango \
-  -d ${pcre_lib} \
-  -d tcl \
-  -d tk \
-  -d unzip \
-  -d which \
-  -d xz-devel \
-  -d zip \
-  -d zlib-devel \
-  "/opt/R/${R_VERSION}"
+cat <<EOF > /tmp/nfpm.yml
+name: R-${R_VERSION}
+version: 1
+version_schema: none
+release: 1
+maintainer: RStudio, PBC <https://github.com/rstudio/r-builds>
+description: |
+  GNU R statistical computation and graphics system
+vendor: RStudio, 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
+- make
+- openblas-devel
+- pango
+- ${pcre_lib}
+- tcl
+- tk
+- unzip
+- which
+- xz-devel
+- zip
+- zlib-devel
+contents:
+- src: /opt/R/${R_VERSION}
+  dst: /opt/R/${R_VERSION}
+scripts:
+  postinstall: /post-install.sh
+  postremove: /after-remove.sh
+EOF
 
-export PKG_FILE=$(ls /tmp/output/rhel-9/R-${R_VERSION}*.rpm | head -1)
+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)