setup-dotnetasp.sh

#!/usr/bin/env sh

set -e
set -x

HELPERSPATH="/helpers"
HELPERSCACHE="/helperscache"
DESIREDVERSION="${1}"
if [ "${DESIREDVERSION}" = "" ] ; then
  DESIREDVERSION="newest"
fi
ARG_CACHEPATH="${2}"

install_dotnetasp()
{
  PARTARCH="$1"
  DOTNETASPVERSION="$2"
  DOTNETCACHEPATH="$3"

  #/helpers/wget-with-retries.sh https://dot.net/v1/dotnet-install.sh "/usr/bin/dotnet-install.sh"
  #chmod +x /usr/bin/dotnet-install.sh
  #/usr/bin/dotnet-install.sh --channel ${DOTNETASPVERSION} --install-dir "${TARGETPATH}" --verbose --runtime aspnetcore

  FILENAME="aspnetcore-runtime-${DOTNETASPVERSION}-linux-${PARTARCH}.tar.gz"
  DOWNLOADURL="https://dotnetcli.blob.core.windows.net/dotnet/aspnetcore/Runtime/${DOTNETASPVERSION}/${FILENAME}"
  LOCALCACHEDIRECTORY="${DOTNETCACHEPATH}"
  if [ -z "${LOCALCACHEDIRECTORY}" ] ; then
    LOCALCACHEDIRECTORY="/tmp/dotnetcache"
  fi
  mkdir -p "${LOCALCACHEDIRECTORY}"
  LOCALCACHEFILENAME="${LOCALCACHEDIRECTORY}/${FILENAME}"
  #if [ ! tar -tzf "${LOCALCACHEFILENAME}" > /dev/null ] ; then
  #  rm -f "${LOCALCACHEFILENAME}"
  #fi
  if [ ! -f "${LOCALCACHEFILENAME}" ] ; then
    /helpers/wget-with-retries.sh "${DOWNLOADURL}" "${LOCALCACHEFILENAME}"
  fi
  [ -f "${LOCALCACHEFILENAME}" ]

  TARGETPATH="/opt/dotnet"
  mkdir -p "${TARGETPATH}"
  tar --no-same-owner -xzf "${LOCALCACHEFILENAME}" -C "${TARGETPATH}"
  [ -f "${TARGETPATH}/dotnet" ]
  [ -d "${TARGETPATH}/shared/Microsoft.AspNetCore.App/${DOTNETASPVERSION}" ]

  if echo ":$PATH:" | grep -v -q ":$TARGETPATH:" ; then
    PATH="${TARGETPATH}:${PATH}"
  fi
  dotnet --info 
}

fetch_dotnetasp_version()
{
  SUPPORT="$1"
  LINENUMBER="$2"

  /helpers/wget-with-retries.sh https://dotnetcli.blob.core.windows.net/dotnet/release-metadata/releases-index.json - \
    | jq -r '.["releases-index"][] | select(."support-phase"=="'"${SUPPORT}"'") | ."latest-runtime"' \
    | sort --version-sort --reverse \
    | awk -v n=$LINENUMBER 'NR==n'
}

getversion_dotnetasp()
{
  PARTARCH="$1"
  SUPPORT="$2"
  LINENUMBER="$3"

  MAXRETRIES=30
  COUNTER=0
  SUCCESS=0
  DOTNETASPVERSION=""

  while [ $SUCCESS -eq 0 ] && [ $COUNTER -lt $MAXRETRIES ] ; do
    echo "Retry #$COUNTER" >&2
    
    # Try primary support phase
    DOTNETASPVERSION="$(fetch_dotnetasp_version "$SUPPORT" "$LINENUMBER")"
    
    # If support is "preview" and nothing found, try "go-live"
    if [ -z "$DOTNETASPVERSION" ] && [ "$SUPPORT" = "preview" ]; then
      echo "Preview not found, trying go-live..." >&2
      DOTNETASPVERSION="$(fetch_dotnetasp_version "go-live" "$LINENUMBER")"
    fi
    
    # fallback to active
    if [ -z "$DOTNETASPVERSION" ] && [ "$SUPPORT" = "preview" ]; then
      echo "Preview not found, trying active..." >&2
      DOTNETASPVERSION="$(fetch_dotnetasp_version "active" "$LINENUMBER")"
    fi
    
    if [ "${DOTNETASPVERSION}" != "" ] ; then
      SUCCESS=1
    else
      COUNTER=$(( $COUNTER + 1 ))
      sleep 5s
    fi
  done
  [ $SUCCESS -eq 1 ]

  [ "${DOTNETASPVERSION}" != "" ]
  echo "${DOTNETASPVERSION}"
}

#DOTNETASPVERSION=$(apt-cache search dotnet-sdk | awk '{print $1}' | awk -F- '{print $3}' | sort --version-sort | tail -n 1)
#${HELPERSPATH}/apt-retry-install.sh dotnet-runtime-${DOTNETASPVERSION}

ARCHITECTURE="$(dpkg --print-architecture)"
if [ "${ARCHITECTURE}" = "amd64" ] ; then PARTARCH="x64" ; else if [ "${ARCHITECTURE}" = "arm64" ] ; then PARTARCH="arm64" ; fi ; fi
[ "${PARTARCH}" != "" ]

# selecting the version to use -- newest, preview, previous -- todo: 8.0, 9.0, 10.0

if [ "${DESIREDVERSION}" = "preview" ] ; then
  DOTNETASPVERSION="$(getversion_dotnetasp ${PARTARCH} preview 1)"
  install_dotnetasp "${PARTARCH}" "${DOTNETASPVERSION}" "${ARG_CACHEPATH}"
elif [ "${DESIREDVERSION}" = "newest" ] || [ "${DESIREDVERSION}" = "" ] ; then
  DOTNETASPVERSION="$(getversion_dotnetasp ${PARTARCH} active 1)"
  install_dotnetasp "${PARTARCH}" "${DOTNETASPVERSION}" "${ARG_CACHEPATH}"
elif [ "${DESIREDVERSION}" = "previous" ] ; then
  DOTNETASPVERSION="$(getversion_dotnetasp ${PARTARCH} active 2)"
  install_dotnetasp "${PARTARCH}" "${DOTNETASPVERSION}" "${ARG_CACHEPATH}"
else
  install_dotnetsdk "${PARTARCH}" "${DESIREDVERSION}" "${ARG_CACHEPATH}"
fi