docker-build-watch.sh

#!/usr/bin/env bash

# Set to the name of the Docker image you want to use
DOCKER_IMAGE_NAME="betterinf-build"

# Stop on first error
set -e

if [ -e Dockerfile ]; then
  # Build a custom Docker image that has custom Jekyll plug-ins installed
  docker build --tag $DOCKER_IMAGE_NAME --file Dockerfile .

  # Remove dangling images from previous runs
  docker rmi -f $(docker images --filter "dangling=true" -q) > /dev/null 2>&1 || true
else
  # Use an existing Jekyll Docker image
  DOCKER_IMAGE_NAME=jekyll/jekyll
fi

# Start Jekyll and watch for changes
docker run --rm \
  --volume=$(pwd):/src:Z \
  $DOCKER_IMAGE_NAME \
  jekyll build --watch