From 8145dba1576256b2e659d6419cfada087b748a59 Mon Sep 17 00:00:00 2001
From: Adam Cooke <me@adamcooke.io>
Date: Tue, 29 Jun 2021 17:47:37 +0100
Subject: [PATCH] chore(docker): add tools for generating docker images

---
 .dockerignore      |  2 -
 .schmersion.yaml   | 14 +++++++
 Dockerfile         | 41 +++++++++++--------
 Makefile           | 98 ++++++++++++++++++++++++++++++++++++++++++++++
 PotamusFile        |  2 -
 docker/wait-for.sh | 60 ++++++++++++++++++++++++++++
 6 files changed, 196 insertions(+), 21 deletions(-)
 create mode 100644 .schmersion.yaml
 create mode 100644 Makefile
 delete mode 100644 PotamusFile
 create mode 100755 docker/wait-for.sh

diff --git a/.dockerignore b/.dockerignore
index 9fb0b66..9d3991d 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -24,5 +24,3 @@ node_modules
 Dockerfile
 vendor/bundle
 .cache
-docker/*
-PotamusFile
diff --git a/.schmersion.yaml b/.schmersion.yaml
new file mode 100644
index 0000000..794e7c9
--- /dev/null
+++ b/.schmersion.yaml
@@ -0,0 +1,14 @@
+exports:
+  - name: CHANGELOG.md
+    formatter: markdown
+    options:
+      title: CHANGELOG
+      description: This file contains all the latest changes and updates to Postal.
+      sections:
+        - title: Features
+          types: [feat]
+        - title: Bug Fixes
+          types: [fix]
+#
+# There are additional options you can define, check out the README for details.
+# https://github.com/krystal/schmersion
diff --git a/Dockerfile b/Dockerfile
index a73a1d1..b0225b8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,16 +1,19 @@
-FROM ruby:2.6
+FROM ruby:2.6 AS base
 
-RUN apt-get update
-RUN apt-get install software-properties-common -y
-
-# Setup additional repositories
-RUN apt-key adv --recv-keys --keyserver hkp://keyserver.ubuntu.com:80 0xF1656F24C74CD1D8
-RUN add-apt-repository 'deb [arch=amd64,i386,ppc64el] http://mirrors.coreix.net/mariadb/repo/10.1/ubuntu xenial main'
-RUN curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add -
-RUN apt-get update
+SHELL ["/bin/bash", "-o", "pipefail", "-c"]
+RUN apt-get update \
+  && apt-get install -y --no-install-recommends \
+  software-properties-common \
+  && apt-key adv --recv-keys --keyserver hkp://keyserver.ubuntu.com:80 0xF1656F24C74CD1D8 \
+  && add-apt-repository 'deb [arch=amd64,i386,ppc64el] http://mirrors.coreix.net/mariadb/repo/10.1/ubuntu xenial main' \
+  && (curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add -) \
+  && (echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list) \
+  && (curl -sL https://deb.nodesource.com/setup_12.x | bash -) \
+  && rm -rf /var/lib/apt/lists/*
 
 # Install main dependencies
-RUN apt-get install -y \
+RUN apt-get update && \
+  apt-get install -y --no-install-recommends \
   build-essential  \
   curl \
   libmariadbclient-dev \
@@ -24,9 +27,7 @@ RUN mkdir -p /opt/postal/app /opt/postal/config
 WORKDIR /opt/postal/app
 
 # Install bundler
-RUN gem install bundler --no-doc
-RUN bundle config frozen 1
-RUN bundle config build.sassc --disable-march-tune-native
+RUN gem install bundler -v 2.1.4 --no-doc
 
 # Install the latest and active gem dependencies and re-run
 # the appropriate commands to handle installs.
@@ -34,15 +35,21 @@ COPY Gemfile Gemfile.lock ./
 RUN bundle install -j 4
 
 # Copy the application (and set permissions)
+COPY ./docker/wait-for.sh /docker-entrypoint.sh
 COPY --chown=postal . .
 
+# Export the version
+ARG VERSION=unspecified
+RUN echo $VERSION > VERSION
+
+# Set the CMD
+ENTRYPOINT [ "/docker-entrypoint.sh" ]
+CMD ["bundle", "exec"]
+
+FROM base AS prod
 # Copy temporary configuration file which can be used for
 # running the asset precompilation.
 COPY --chown=postal config/postal.defaults.yml /opt/postal/config/postal.yml
 
-# Precompile assets
 RUN POSTAL_SKIP_CONFIG_CHECK=1 RAILS_GROUPS=assets bundle exec rake assets:precompile
 RUN touch /opt/postal/app/public/assets/.prebuilt
-
-# Set the CMD
-CMD ["bundle", "exec"]
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..753c1ad
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,98 @@
+# ==============================================================================
+# Welcome to the Makefile
+# ==============================================================================
+#
+# This Makefile contains a series of tasks which can help with building, testing
+# and working with the app. The following tasks are available to you:
+#
+# Image building & releasing actions:
+#
+#   make docker-build      - Builds a production Docker image.
+#   make docker-ci-build   - Builds an image without any asset compilation,
+#                            ideal for running test suites and similar tasks.
+#   make docker-image      - Builds a production Docker image and tags it as
+#                            appropriate based on the current branch & tag.
+#   make docker-release    - Builds a production Docker image and uploads to the
+#                            registry.
+#
+
+# ==============================================================================
+# Configuration
+# ==============================================================================
+
+# Docker image name to release the production image as.
+DOCKER_IMAGE := postalhq/postal
+
+# Path to bundle config
+BUNDLE_CONFIG ?= $(HOME)/.bundle/config
+
+# Detect if a tty is available
+TTY := $(shell [ -t 0 ] && echo 1)
+
+# Tag names
+DOCKER_TAG_NAME ?= $(shell git rev-parse --abbrev-ref HEAD 2>/dev/null)
+DOCKER_TAG_VERSION ?= $(shell git describe --tags --exact-match 2>/dev/null)
+
+ifeq ($(DOCKER_TAG_NAME),master)
+	DOCKER_TAG_NAME = latest
+endif
+
+ifeq ($(DOCKER_TAG_NAME),main)
+	DOCKER_TAG_NAME = latest
+endif
+
+# Version string to use
+VERSION ?= $(DOCKER_TAG_VERSION)
+ifeq ($(VERSION),)
+	VERSION = $(shell git describe --tags 2>/dev/null)
+endif
+
+ifeq ($(VERSION),)
+	VERSION = 0.0.0-dev
+endif
+
+# ==============================================================================
+# Image Building
+# ==============================================================================
+
+DOCKER_BUILD_CMD = DOCKER_BUILDKIT=1 docker \
+	build $(if $(TTY),,--progress plain) \
+	--build-arg VERSION=$(VERSION) \
+	--secret "id=bundle_config,src=$(BUNDLE_CONFIG)" \
+	.
+
+DOCKER_CI_BUILD_CMD = $(DOCKER_BUILD_CMD) --target=ci
+
+.PHONY: docker-build
+docker-build:
+	$(DOCKER_BUILD_CMD)
+
+.PHONY: docker-ci-build
+docker-ci-build:
+	$(DOCKER_CI_BUILD_CMD)
+
+# ==============================================================================
+# Image Tagging
+# ==============================================================================
+
+.PHONY: docker-image
+docker-image: docker-build
+	$(eval IMAGE := $(shell $(DOCKER_BUILD_CMD) -q))
+ifeq ($(DOCKER_TAG_NAME),latest)
+	docker tag "$(IMAGE)" "$(DOCKER_IMAGE):$(DOCKER_TAG_NAME)"
+endif
+
+# ==============================================================================
+# Image Releasing
+# ==============================================================================
+
+.PHONY: docker-release
+docker-release: docker-image
+ifeq ($(DOCKER_TAG_NAME),latest)
+	docker push "$(DOCKER_IMAGE):$(DOCKER_TAG_NAME)"
+endif
+ifneq ($(DOCKER_TAG_VERSION),)
+	docker tag "$(DOCKER_IMAGE):$(DOCKER_TAG_NAME)" \
+		"$(DOCKER_IMAGE):$(DOCKER_TAG_VERSION)" && \
+		docker push "$(DOCKER_IMAGE):$(DOCKER_TAG_VERSION)"
+endif
diff --git a/PotamusFile b/PotamusFile
deleted file mode 100644
index c6e9573..0000000
--- a/PotamusFile
+++ /dev/null
@@ -1,2 +0,0 @@
-image_name: adamcooke/postal
-
diff --git a/docker/wait-for.sh b/docker/wait-for.sh
new file mode 100755
index 0000000..ff11c85
--- /dev/null
+++ b/docker/wait-for.sh
@@ -0,0 +1,60 @@
+#!/bin/sh
+[ -n "$DEBUG" ] && set -x
+
+check_http() {
+  wget -T 1 -S -q -O - "$1" 2>&1 | head -1 |
+    head -1 | grep -E 'HTTP.+\s2\d{2}' >/dev/null 2>&1
+  return $?
+}
+
+check_tcp() {
+  host="$(echo "$1" | cut -d: -f1)"
+  port="$(echo "$1" | cut -d: -f2)"
+  if [ -z "${host}" ] || [ -z "${port}" ]; then
+    echo "TCP target ${1} is not in \"<host>:<port>\" format" >&2
+    exit 2
+  fi
+
+  nc -z -w1 "$host" "$port" >/dev/null 2>&1
+  return $?
+}
+
+wait_for() {
+  type="$1"
+  uri="$2"
+  timeout="${3:-30}"
+
+  seconds=0
+  while [ "$seconds" -lt "$timeout" ] && ! "check_${type}" "$uri"; do
+    if [ "$seconds" -lt "1" ]; then
+      printf "Waiting for %s  ." "$uri"
+    else
+      printf .
+    fi
+    seconds=$((seconds + 1))
+    sleep 1
+  done
+
+  if [ "$seconds" -lt "$timeout" ]; then
+    if [ "$seconds" -gt "0" ]; then
+      echo "  up!"
+    fi
+  else
+    echo "  FAIL"
+    echo "ERROR: unable to connect to: $uri" >&2
+    exit 1
+  fi
+}
+
+if [ -n "$WAIT_FOR_TARGETS" ]; then
+  uris="$(echo "$WAIT_FOR_TARGETS" | sed -e 's/\s+/\n/g' | uniq)"
+  for uri in $uris; do
+    if echo "$uri" | grep -E '^https?://.*' >/dev/null 2>&1; then
+      wait_for "http" "$uri" "$WAIT_FOR_TIMEOUT"
+    else
+      wait_for "tcp" "$uri" "$WAIT_FOR_TIMEOUT"
+    fi
+  done
+fi
+
+exec "$@"