helper-curl

#!/bin/sh
# shellcheck disable=SC1083,SC2083,SC2086
set -e

TYPE=$1
BIN_OR_ARGS=$2
URL=$3

case $TARGETARCH in
amd64)
  GOARCH=amd64
  UARCH=x86_64
  WTFARCH=x86_64
  ;;
arm64)
  GOARCH=arm64
  UARCH=aarch64
  WTFARCH=arm64
  ;;
arm)
  GOARCH=arm
  UARCH=armv7
  WTFARCH=arm
  ;;
*)
  echo "Unsupported architecture: $TARGETARCH."
  GOARCH=$TARGETARCH
  UARCH=$TARGETARCH
  WTFARCH=$TARGETARCH
  ;;
esac

mangle() {
  echo $1 | sed \
  -e s/@GOARCH/$GOARCH/g \
  -e s/@UARCH/$UARCH/g \
  -e s/@WTFARCH/$WTFARCH/g \
  #
}

URL=$(mangle $URL)
BIN_OR_ARGS=$(mangle "$BIN_OR_ARGS")

if ! curl -fsSLI $URL >/dev/null; then
  echo "URL not found: $URL"
  BIN=${BIN_OR_ARGS##*/}
  echo "Installing placeholder: $BIN"
  cp /bin/helper-unsupported /usr/local/bin/$BIN
  exit 0
fi

case "$TYPE" in
bin)
  BIN=$BIN_OR_ARGS
  curl -fsSL $URL > /usr/local/bin/$BIN
  chmod +x /usr/local/bin/$BIN
  ;;
tar)
  ARGS=$BIN_OR_ARGS
  curl -fsSL $URL | tar -zxvf- -C /usr/local/bin $ARGS
  ;;
*)
  echo "Unrecognized download type: $TYPE"
  exit 1
  ;;
esac