CI/CD with bash/git/docker-compose

database.yml

default: &default
  adapter: postgresql
  encoding: unicode
  host: db
  username: postgres
  password:
  pool: 5

development:
  <<: *default
  database: landing_politechnika_development


test:
  <<: *default
  database: landing_politechnika_test

Dockerfile.local.ci

FROM ruby:2.5.1-alpine3.7

RUN apk add --no-cache --update build-base linux-headers git postgresql-dev nodejs tzdata

ENV APP_PATH /www

RUN mkdir -p $APP_PATH
WORKDIR $APP_PATH

COPY Gemfile $APP_PATH/Gemfile
COPY Gemfile.lock $APP_PATH/Gemfile.lock
RUN echo "gem: --no-rdoc --no-ri" >> ".gemrc"
RUN bundle install --jobs 20 --retry 5

COPY . $APP_PATH

local.ci.yml

version: '3'
services:
  db:
    image: postgres:alpine
    restart: always
    volumes:
      - ../db:/var/lib/postgresql/data
  web:
    build:
      context: .
      dockerfile: Dockerfile.local.ci
    container_name: landing_politechnika
    env_file: .env
    command:
      bundle exec unicorn --config-file config/unicorn.rb --env $RAILS_ENV
    volumes:
      - .:/var/opt/www
    ports:
      - "3000:8080"
    depends_on:
      - db

post-update

#!/usr/bin/env bash

refname=$1

if [[ $refname == "refs/tags/deploy" ]]
then
  if [[ -f $refname ]]
  then
    echo "[DEPLOY] $rev"
    git tag --verify deploy
    rev=$(cat $refname)
    mkdir $rev
    git archive $rev | tar -xf - -C $rev
    [ -d shared ] && cp -R shared/. $rev
    pushd $rev
    docker-compose --file local.ci.yml up --detach
    popd
    ln -s $rev current
  else
    echo "[ HALT ] $(readlink current)"
    pushd current
    docker-compose --file local.ci.yml down
    popd
    rm -rf $(readlink current)
    rm -rf current
  fi
fi

exit 0