functions.sh

#!/usr/bin/env bash

# Prerequisite
# Make sure you set secret environment variables in CI
# DOCKER_USERNAME
# DOCKER_PASSWORD
# API_TOKEN
# applications, such as curl

# Usage to set variable "CURL_OPTIONS"
#
# if [[ "${CI}" == "true" ]]; then
#   CURL_OPTIONS="-sL -H \"Authorization: token ${API_TOKEN}\""
# else
#   CURL_OPTIONS="-sL"
# fi

function install_jq() {
  # jq 1.6
  DEBIAN_FRONTEND=noninteractive
  #sudo apt-get update && sudo apt-get -q -y install jq
  curl -sL https://github.com/stedolan/jq/releases/download/jq-1.6/jq-linux64 -o jq
  sudo mv jq /usr/bin/jq
  sudo chmod +x /usr/bin/jq
}

function get_latest_release() {
  eval curl "$CURL_OPTIONS" "https://api.github.com/repos/$1/releases/latest" | jq -r '.tag_name | ltrimstr("v")'
}

function get_published_date() {
  eval curl "$CURL_OPTIONS" -s "https://api.github.com/repos/$1/releases/latest" | jq -r '.published_at'
}

function get_image_published_date() {
  eval curl "$CURL_OPTIONS" -s "https://hub.docker.com/v2/repositories/$1/tags/" | jq -r '.results[] | select(.name == "latest") | .last_updated'
}

function get_image_tags() {
  eval curl "$CURL_OPTIONS" -s "https://hub.docker.com/v2/repositories/$1/tags/" | jq -r '.results[].name'
}

function build_docker_image() {
  local tag="${1}"
  local image_name="${2}"
  local platform="${3}"
  local build_arg="${4}"

  minor=${tag%.*}
  major=${tag%%.*}

  # Create a new buildx builder instance
  builder_name=$(uuidgen)
  docker buildx create --use --name "mybuilder-${builder_name}"
  
  if [[ "$CIRCLE_BRANCH" == "master" || "$CIRCLE_BRANCH" == "main" ]]; then
    docker login -u $DOCKER_USERNAME -p $DOCKER_PASSWORD
    docker buildx build --progress=plain --push \
     --platform "${platform}" \
     --build-arg "${build_arg}" \
     --no-cache \
     --tag "${image_name}:${tag}" \
     --tag "${image_name}:latest" \
     --tag "${image_name}:${minor}" \
     --tag "${image_name}:${major}" \
     .
  fi

  # Clean up the builder instance
  docker buildx rm "mybuilder-${builder_name}"
}

function install_crane() {
  case `uname -s` in \
      Darwin) file="go-containerregistry_Darwin_x86_64.tar.gz"; ;; \
      Linux) file="go-containerregistry_Linux_x86_64.tar.gz"; ;; \
      *) echo "un-supported arch, exit ..."; exit 1; ;; \
  esac

  # install crane
  curl -L https://github.com/google/go-containerregistry/releases/download/v0.11.0/${file} |tar zx -C /tmp
  mv /tmp/crane .
  chmod +x crane
}

function install_trivy() {
  curl -sfL https://raw.githubusercontent.com/aquasecurity/trivy/main/contrib/install.sh | sh -s -- -b /usr/local/bin
}