use

#!/bin/sh

# Usage:
#
#   source <(curl https://raw.githubusercontent.com/k1LoW/ndiag/master/use)
#
# Reference:
#   https://github.com/goreleaser/get

NDIAG_GOOS=linux
NDIAG_EXT=tar.gz
NDIAG_ARCH=amd64
if test $(uname -s) = "Darwin"
then
  NDIAG_GOOS=darwin
  NDIAG_EXT=zip
fi
NDIAG_ARCHIVE="/tmp/ndiag.${NDIAG_EXT}"

NDIAG_RELEASES_URL="https://github.com/k1LoW/ndiag/releases"
test -z "$NDIAG_TMPDIR" && NDIAG_TMPDIR="$(mktemp -d)"

last_version() {
  curl -sL -o /dev/null -w %{url_effective} "$NDIAG_RELEASES_URL/latest" |
    rev |
    cut -f1 -d'/'|
    rev
}

download() {
  test -z "$NDIAG_VERSION" && NDIAG_VERSION="$(last_version)"
  test -z "$NDIAG_VERSION" && {
    echo "Unable to get ndiag version." >&2
    exit 1
  }
  rm -f "$NDIAG_ARCHIVE"
  curl -s -L -o "$NDIAG_ARCHIVE" \
    "${NDIAG_RELEASES_URL}/download/${NDIAG_VERSION}/ndiag_${NDIAG_VERSION}_${NDIAG_GOOS}_${NDIAG_ARCH}.${NDIAG_EXT}"
}

download
if test ${NDIAG_EXT} = "tar.gz"
then
  tar -xf "$NDIAG_ARCHIVE" -C "$NDIAG_TMPDIR"
elif test ${NDIAG_EXT} = "zip"
then
  unzip -qo "$NDIAG_ARCHIVE" -d "$NDIAG_TMPDIR"
fi
export PATH=${NDIAG_TMPDIR}:$PATH
echo -e '\e[36mYou can use `ndiag` command in this session.\e[m'