meteor-in-docker production - build script

build.sh

#!/usr/bin/env bash
#
# Builds the docker image used in deployments.
# - embedding most files inside the image
# - turning on compilation and optimization
# - this requires the dev image as a tool (will pull it if not already available)
#
# This WILL wipe out any previous build and replace with a new one

# fetch build info to embed in the image
branch=`git rev-parse --abbrev-ref HEAD`
commit=`git rev-parse --short HEAD`
[ -z "`git status -s`" ] || untracked='+untracked'
repo=`basename -s .git \`git config --get remote.origin.url\``
BUILD_ID="$repo#$branch@$commit$untracked"
BUILD_TS=`date -Iseconds`
echo "-- build $BUILD_ID on $BUILD_TS"

# dev image is our docker hub public image
docker_img_dev="assetsagacity/meteor-do"
# outuput imaeg is our private app image
docker_img_prod="assetsagacity/our-private-app"

# output dir must be a full path, as we later mount it as a docker volume
output_dir="$PWD/.tmp/build"
rm -rf $output_dir
mkdir -p $output_dir
# home dir for the builder is mounted, to provide a cache for meteor files between builds
home_dir=${PWD}/.tmp/home
mkdir -p $home_dir

# we do dep install + bundle build as part of this bash script,
# NOT inside the multi-stage dockerfile because:
# - we can mount code+meteor files here on run,
# whereas on build we could only ADD them (slowly copying them to the daemon)

echo "-- install dependencies"
docker run --rm \
  --volume="${PWD}":/app \
  --volume="$home_dir":/home/meteor \
  $docker_img_dev meteor npm install

# A few things to note
# - we use the dev container to build the prod image, to bypass host setup completely
# - we use `docker run` instead of `docker-compose` because build host might not have docker-compose
# - we set `METEOR_ALLOW_SUPERUSER` because host might be running this as root
# - we mount user /home/meteor, to provide a cache for meteor files between builds
echo "-- build meteor dump"
docker run --rm \
  --volume="${PWD}":/app \
  --volume="$home_dir":/home/meteor \
  --volume="$output_dir":/build \
  -e "METEOR_ALLOW_SUPERUSER=true" \
  $docker_img_dev meteor build --directory /build \
  && cp Dockerfile $output_dir/Dockerfile \
  && echo "-- build docker container $docker_img_prod" \
  && docker build --build-arg BUILD_ID=$BUILD_ID --build-arg BUILD_TS=$BUILD_TS -t $docker_img_prod $output_dir