use

#!/bin/sh

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

TBLS_GOOS=linux
TBLS_EXT=tar.gz
TBLS_ARCH=amd64
if test $(uname -s) = "Darwin"
then
  TBLS_GOOS=darwin
  TBLS_EXT=zip
fi
TBLS_ARCHIVE="/tmp/tbls.${TBLS_EXT}"

TBLS_RELEASES_URL="https://github.com/k1LoW/tbls/releases"
test -z "${TBLS_TMPDIR:-}" && TBLS_TMPDIR="$(mktemp -d)"

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

download() {
  test -z "${TBLS_VERSION:-}" && TBLS_VERSION="$(last_version)"
  test -z "${TBLS_VERSION:-}" && {
    echo "Unable to get tbls version." >&2
    exit 1
  }
  # Skip downloading if the newest file was downloaded before
  curl `if [ -f "$TBLS_ARCHIVE" ]; then echo -z "$TBLS_ARCHIVE"; fi` \
    -s -L -o "$TBLS_ARCHIVE" \
    "${TBLS_RELEASES_URL}/download/${TBLS_VERSION}/tbls_${TBLS_VERSION}_${TBLS_GOOS}_${TBLS_ARCH}.${TBLS_EXT}"
}

download
if test ${TBLS_EXT} = "tar.gz"
then
  tar -xf "$TBLS_ARCHIVE" -C "$TBLS_TMPDIR"
elif test ${TBLS_EXT} = "zip"
then
  unzip -qo "$TBLS_ARCHIVE" -d "$TBLS_TMPDIR"
fi
export PATH=${TBLS_TMPDIR}:$PATH
printf '\e[36mYou can use `tbls` command in this session.\e[m\n'