Install natscli from bash

Install-natscli.md

How to install

Note: The script requires root permissions as it installs nats executable into /usr/local/bin

curl -sSL https://gist.githubusercontent.com/charbonnierg/b68d85e908c90160a1118838f2cceb63/raw/install-natscli.sh | bash

• Install specific version:

export NATSCLI_VERSION="0.0.30"
curl -sSL https://gist.githubusercontent.com/charbonnierg/b68d85e908c90160a1118838f2cceb63/raw/install-natscli.sh | bash

• Install specific arch:

export ARCH="arm7"
curl -sSL https://gist.githubusercontent.com/charbonnierg/b68d85e908c90160a1118838f2cceb63/raw/install-natscli.sh | bash

install-natscli.sh

#!/usr/bin/env bash

set -eou pipefail

DEFAULT_VERSION="${NATSCLI_VERSION:-0.0.30}"
DEFAULT_ARCH="${ARCH:-amd64}"

# Arch can be specified as first argument or as ARCH env variable
ARCH="${1:-$DEFAULT_ARCH}"
# Version can be specified as second argument or NATSCLI_VERSION env variable
VERSION="${2:-$DEFAULT_VERSION}"
# The name of the release file without the ".zip" prefix
RELEASE="nats-${VERSION}-linux-${ARCH}"
# Construct URL of release file
URI="https://github.com/nats-io/natscli/releases/download/${VERSION}/${RELEASE}.zip"

install_nats() {
  # Remove both archive and directory on exit and error
  trap "rm -Rf ${RELEASE}*" err exit
  # Download using wget (you could use curl or any other CLI http client)
  wget -q --show-progress "$URI"
  # Extract content
  unzip -q "${RELEASE}.zip"
  # Ensure nats binary is executable
  chmod +x "${RELEASE}/nats"
  # You may want to use sudo here
  mv "${RELEASE}/nats" /usr/local/bin/
}

display_help() {
    echo -e "Usage:"
    echo -e ""
    echo -e "    ./install-natscli.sh [ARCH] [NATSCLI_VERSION]"
    echo -e ""
    echo -e "* Both arguments can be specified as environment variables. (Example: ARCH=amd64 ./install-natscli.sh)"
    echo -e "* Arguments take precedence over environment variables."
    echo -e "* Allowed architectures: 'amd64', 'arm64', 'arm7', 'arm6', '386'"
    echo -e "* Default natscli version: '${DEFAULT_VERSION}'"
    echo -e ""
    exit
}

# By default perform install
if [[ -z "${1+x}" ]]; then
    install_nats
    exit
fi

# If arguments are provided, check if --help or -h flag are present
ARGS=()
while [[ $# -gt 0 ]]; do
  key="$1"

  case $key in
    -h|--help)
      display_help
      # Exit after displaying help
      exit
      ;;
    *)
      shift
      ;;
  esac
done

install_nats