like https://gist.github.com/pmuellr/3854a1a7f17159b432e6 , but gets the N|Solid release versions dynamically

nsolid-install-dynamic.sh

#!/bin/bash

#-------------------------------------------------------------------------------
# download/unpack componentry for N|Solid into ~/nsolid
#-------------------------------------------------------------------------------

# directories

DIR_DOWN=~/Downloads
DIR_INST=~/nsolid

# URL prefixes
URL_NSOL=https://nsolid-download.nodesource.com/download
URL_ETCD=https://github.com/coreos/etcd/releases/download

# version #'s
VERSION_ETCD=v2.2.5
VERSION_NSOL=`curl -s https://nsolid-download.nodesource.com/download/nsolid-node/release/index.tab    | tail -n +2 | sort -r | head -n 1 | cut -f2`
VERSION_CONS=`curl -s https://nsolid-download.nodesource.com/download/nsolid-console/release/index.tab | tail -n +2 | sort -r | head -n 1 | cut -f2`
VERSION_PROX=`curl -s https://nsolid-download.nodesource.com/download/nsolid-proxy/release/index.tab   | tail -n +2 | sort -r | head -n 1 | cut -f2`

echo "downloading N|Solid to ${DIR_DOWN}"
echo "installing  N|Solid in ${DIR_INST}"
echo ""

# get os version
if [[ "$OSTYPE" == "linux-gnu" ]]; then
  OS=linux
  ETCD_EXT=tar.gz
elif [[ "$OSTYPE" == "darwin"* ]]; then
  OS=darwin
  ETCD_EXT=zip
else
  echo "unknown OS, downloading linux"
  OS=linux
  ETCD_EXT=tar.gz
fi

#-------------------------------------------------------------------------------
# start downloads
#-------------------------------------------------------------------------------

mkdir -p ${DIR_DOWN}

echo "downloading N|Solid Runtime ${VERSION_NSOL}"
curl \
  --user-agent nsolid-install.sh \
  --location \
  --progress-bar \
  --output ${DIR_DOWN}/nsolid-node.tar.gz \
  ${URL_NSOL}/nsolid-node/release/${VERSION_NSOL}/nsolid-${VERSION_NSOL}-${OS}-x64.tar.gz

echo "downloading N|Solid Console ${VERSION_CONS}"
curl \
  --user-agent nsolid-install.sh \
  --location \
  --progress-bar \
  --output ${DIR_DOWN}/nsolid-cons.tar.gz \
  ${URL_NSOL}/nsolid-console/release/${VERSION_CONS}/nsolid-console-${VERSION_CONS}-${OS}-x64.tar.gz

echo "downloading N|Solid Proxy ${VERSION_PROX}"
curl \
  --user-agent nsolid-install.sh \
  --location \
  --progress-bar \
  --output ${DIR_DOWN}/nsolid-prox.tar.gz \
  ${URL_NSOL}/nsolid-proxy/release/${VERSION_PROX}/nsolid-proxy-${VERSION_PROX}.tar.gz

echo "downloading etcd ${VERSION_ETCD}"
curl \
  --user-agent nsolid-install.sh \
  --location \
  --progress-bar \
  --output ${DIR_DOWN}/etcd.${ETCD_EXT} \
  ${URL_ETCD}/${VERSION_ETCD}/etcd-${VERSION_ETCD}-${OS}-amd64.${ETCD_EXT}

#-------------------------------------------------------------------------------
# unpack
#-------------------------------------------------------------------------------

echo ""
echo "unpacking tarballs"

mkdir -p ${DIR_INST}
mkdir -p ${DIR_INST}/console
mkdir -p ${DIR_INST}/proxy
mkdir -p ${DIR_INST}/etcd

rm -rf   ${DIR_INST}/console/*
rm -rf   ${DIR_INST}/proxy/*
rm -rf   ${DIR_INST}/etcd/*

tar --strip-components 1 -zxf ${DIR_DOWN}/nsolid-node.tar.gz -C ${DIR_INST}
tar --strip-components 1 -zxf ${DIR_DOWN}/nsolid-cons.tar.gz -C ${DIR_INST}/console
tar --strip-components 1 -zxf ${DIR_DOWN}/nsolid-prox.tar.gz -C ${DIR_INST}/proxy
tar --strip-components 1 -zxf ${DIR_DOWN}/etcd.${ETCD_EXT}   -C ${DIR_INST}/etcd

#-------------------------------------------------------------------------------
# write launch scripts
#-------------------------------------------------------------------------------

#--------------------------------------
echo "writing launch-etcd.sh"

cat > ${DIR_INST}/launch-etcd.sh << END_ETCD_SH
#!/bin/sh
cd ${DIR_INST}/etcd
./etcd
END_ETCD_SH

chmod +x ${DIR_INST}/launch-etcd.sh

#--------------------------------------
echo "writing launch-nsolid-console.sh"

cat > ${DIR_INST}/launch-nsolid-console.sh << END_CONSOLE_SH
#!/bin/sh
cd ${DIR_INST}/console
NODE_ENV=production ../bin/nsolid bin/nsolid-console --interval=3000
END_CONSOLE_SH

chmod +x ${DIR_INST}/launch-nsolid-console.sh

#--------------------------------------
echo "writing launch-proxy.sh"

cat > ${DIR_INST}/launch-nsolid-proxy.sh << END_PROXY_SH
#!/bin/sh
cd ${DIR_INST}/proxy
../bin/nsolid proxy.js
END_PROXY_SH

chmod +x ${DIR_INST}/launch-nsolid-proxy.sh