Keep the build images DRY

scripts/custom-docker-build

@@ -0,0 +1,105 @@
+#!/bin/sh
+
+set -e
+IFS=$'\n\t'
+
+function print_golang_args() {
+    GOLANG_VERSION=$1
+
+    case "$GOLANG_VERSION" in
+        1.8)
+            GOLANG_DOWNLOAD_SHA256=253ab94104ee3923e228a2cb2116e5e462ad3ebaeea06ff04463479d7f12d27ca
+            ;;
+        *) echo "Unknown golang version $1"; exit 1;
+    esac
+
+    printf -- "--build-arg GOLANG_VERSION=%s " "$GOLANG_VERSION"
+    printf -- "--build-arg GOLANG_DOWNLOAD_SHA256=%s " "$GOLANG_DOWNLOAD_SHA256"
+}
+
+function print_chrome_args() {
+    case "$1" in
+        60|60.0) CHROME_VERSION=60.0.3112.90-1 ;;
+        *) echo "Unknown chrome version $1"; exit 1;
+    esac
+    printf -- "--build-arg CHROME_VERSION=%s " "$CHROME_VERSION"
+}
+
+function print_git_args() {
+    case "$1" in
+        2.7)
+            # Code-debt: When the build refers to "git 2.7" its actually "default" git.
+            # so don't actually install a git 2.7 as a default copy is already installed
+            return
+            ;;
+        2.8|2.8.4)
+            GIT_VERSION=2.8.4
+            GIT_DOWNLOAD_SHA256=626e319f8a24fc0866167ea5f6bf3e2f38f69d6cb2e59e150f13709ca3ebf301
+            ;;
+        2.13)
+            GIT_VERSION=2.13.0
+            GIT_DOWNLOAD_SHA256=9f2fa8040ebafc0c2caae4a9e2cb385c6f16c0525bcb0fbd84938bc796372e80
+            ;;
+        *) echo "Unknown git version $1"; exit 1;
+    esac
+
+    printf -- "--build-arg GIT_VERSION=%s " "$GIT_VERSION"
+    printf -- "--build-arg GIT_DOWNLOAD_SHA256=%s " "$GIT_DOWNLOAD_SHA256"
+}
+
+function print_phantomjs_args() {
+    case "$1" in
+        2.1) PHANTOMJS_VERSION=2.1.1 ;;
+        *) echo "Unknown phantomjs version $1"; exit 1;
+    esac
+    printf -- "--build-arg PHANTOMJS_VERSION=%s " "$PHANTOMJS_VERSION"
+}
+
+function print_node_args() {
+    case "$1" in
+        7.1) NODE_VERSION=7.x ;;
+        *) echo "Unknown chrome version $1"; exit 1;
+    esac
+    printf -- "--build-arg NODE_VERSION=%s " "$NODE_VERSION"
+}
+
+function print_postgres_args() {
+    printf -- "--build-arg POSTGRES_VERSION=%s " "$1"
+}
+
+function parse_arguments() {
+    read base
+    read base_version
+    printf -- "-f Dockerfile.custom " "$base"
+    printf -- "--build-arg CUSTOM_IMAGE_NAME=%s " "$base"
+    printf -- "--build-arg CUSTOM_IMAGE_VERSION=%s " "$base_version"
+    while read image; do
+        read version
+        case "$image" in
+            golang) print_golang_args $version ;;
+            chrome) print_chrome_args $version ;;
+            git) print_git_args $version ;;
+            phantomjs) print_phantomjs_args $version ;;
+            node) print_node_args $version ;;
+            postgresql) print_postgres_args $version ;;
+            *) exit 1;;
+        esac
+    done
+}
+
+function generate_command() {
+    buildimage_name=$1; shift;
+
+    printf -- "docker build "
+    echo $buildimage_name | tr '-' '\n' | parse_arguments
+
+    for i in "$@"
+    do
+        printf -- "%s " "$i"
+    done
+    printf -- ".\\n"
+}
+
+docker_command=$(generate_command $@)
+echo "$1: executing $docker_command"
+eval $docker_command

scripts/install-essentials

@@ -11,7 +11,7 @@ apt-get install -y \
 	libxslt-dev libcurl4-openssl-dev libicu-dev \
 	logrotate python-docutils pkg-config cmake nodejs \
 	libkrb5-dev postgresql-client mysql-client unzip \
-	libre2-dev \
+	libre2-dev gettext \
 
 echo deb http://httpredir.debian.org/debian stretch main > /etc/apt/sources.list.d/stretch.list
 apt-get update -yqqq

scripts/install-node

@@ -2,8 +2,10 @@
 
 set -xeo pipefail
 
+NODE_VERSION=${1:-7.x}
+
 # add official debian repos for node and yarn
-curl -sS -L https://deb.nodesource.com/setup_7.x | bash -
+curl -sS -L https://deb.nodesource.com/setup_${NODE_VERSION} | bash -
 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