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Created February 6, 2020 07:05
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docker config to deploy jekyll blog using github actions
# Ok, here the keys are pretty much self explanatory :)
name: 'Deploy new version'
description: 'Setup Ruby env and build new site version'
author: 'Sujay Kundu'
using: 'docker'
image: 'Dockerfile'
# Our Docker image will be based on ruby:2-slim
# it is a very light docker image.
FROM ruby:2-slim
LABEL author="Sujay Kundu"
LABEL version="1.0.0"
# Lets install all dependencies
# including git and Bundler 2.1.4
RUN apt-get update && \
apt-get install --no-install-recommends -y \
bats \
build-essential \
ca-certificates \
curl \
libffi6 \
make \
shellcheck \
libffi6 \
git-all \
&& gem install bundler:2.1.4 \
&& bundle config --global silence_root_warning 1
# This is our entrypoint to our custom scripts
# more about that in a sec
# Use the file as the container entrypoint
# when Github executes our Docker container
ENTRYPOINT ["sh", "/"]
# Exit immediately if a pipeline returns a non-zero status.
set -e
echo "🚀 Starting deployment action"
# Here we are using the variables
# - GITHUB_ACTOR: It is already made available for us by Github. It is the username of whom triggered the action
# - GITHUB_TOKEN: That one was intentionally injected by us in our workflow file.
# Creating the repository URL in this way will allow us to `git push` without providing a password
# All thanks to the GITHUB_TOKEN that will grant us access to the repository
# We need to clone the repo here.
# Remember, our Docker container is practically pristine at this point
git clone $REMOTE_REPO repo
cd repo
# Install all of our dependencies inside the container
# based on the git repository Gemfile
echo "⚡️ Installing project dependencies..."
bundle install
# Build the website using Jekyll
echo "🏋️ Building website..."
JEKYLL_ENV=production bundle exec jekyll build
echo "Jekyll build done"
# Now lets go to the generated folder by Jekyll
# and perform everything else from there
cd _site
echo "☁️ Publishing website"
# We don't need the file on this branch
rm -f
# Now we init a new git repository inside _site
# So we can perform a commit
git init
git config "${GITHUB_ACTOR}"
git config "${GITHUB_ACTOR}"
git add .
# That will create a nice commit message with something like:
# Github Actions - Fri Sep 6 12:32:22 UTC 2019
git commit -m "Github Actions - $(date)"
echo "Build branch ready to go. Pushing to Github..."
# Force push this update to our gh-pages
git push --force $REMOTE_REPO master:gh-pages
# Now everything is ready.
# Lets just be a good citizen and clean-up after ourselves
rm -fr .git
cd ..
rm -rf repo
echo "🎉 New version deployed 🎊"
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