Build syslgen docker image using travis (#2)

* Add image build script
* Modify secure variables, refactor build script
* Standardize command-line syntax

.travis.yml

@@ -0,0 +1,17 @@
+language: generic
+sudo: false
+services:
+- docker
+env:
+  global:
+  - secure: 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
+  - secure: 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
+before_deploy:
+- sh build-image.sh ${TRAVIS_TAG} build
+deploy:
+- provider: script
+  script: docker login -u "$DOCKER_USER" -p "$DOCKER_PASS"  && sh build-image.sh ${TRAVIS_TAG} deploy
+  on:
+    repo: anz-bank/syslgen-examples
+    tags: true
+    condition: "$TRAVIS_OS_NAME = linux"

Dockerfile

@@ -0,0 +1,6 @@
+ARG SYSL2_VERSION
+
+FROM anzbank/sysl2:${SYSL2_VERSION}
+
+ENV SYSLGEN_BASE=/syslgen-examples
+COPY . .

build-image.sh

@@ -0,0 +1,42 @@
+#!/bin/sh
+
+set -e -x
+
+TAG=$1
+COMMAND=$2
+
+usage() {
+    echo "Usage: sh build-image.sh <tag> (build|deploy)"
+    echo "eg: sh build-image.sh 0.0.1 build"  
+}
+
+if [ -z "$TAG" ]; then
+    echo "Tag is not specified."
+    usage
+    exit 1
+fi
+
+if [ "$COMMAND" != "build" ] && [ "$COMMAND" != "deploy" ]; then
+    echo "Invalid command or command not specified."
+    usage
+    exit 1
+fi
+
+SYSL2_VERSION=0.2.5-ubuntu18.04
+DOCKER_IMAGE="anzbank/syslgen-examples"
+DOCKER_IMAGE_VERSIONED="$DOCKER_IMAGE:${TAG}"
+
+build() {
+    docker build --build-arg SYSL2_VERSION=$SYSL2_VERSION -t "$DOCKER_IMAGE" -f Dockerfile .
+    docker tag "$DOCKER_IMAGE" "$DOCKER_IMAGE_VERSIONED"
+}
+
+deploy() {
+    docker push "$DOCKER_IMAGE_VERSIONED" && docker push "$DOCKER_IMAGE"
+}
+
+if [ "$COMMAND" = "build" ]; then
+    build
+elif [ "$COMMAND" = "deploy" ]; then
+    deploy
+fi