Add build targets for a Docker image

Build a docker image using Jib (https://github.com/GoogleContainerTools/jib),
and add a Makefile to build, run and build the docker image.

See README.md to get started.

Author: testinfected

Makefile

@@ -0,0 +1,20 @@
+.PHONY: clean build all
+
+VERSION := $(shell ./version.sh simple)
+
+all: build docker-image
+
+clean:
+	@echo "Cleaning..."
+	@./gradlew clean
+
+build:
+	@echo "Building version ${VERSION}..."
+	@./gradlew build
+
+run:
+	@./gradlew run
+
+docker-image:
+	@echo "Building image ${VERSION}..."
+	@./gradlew -Pversion=${VERSION} -p server jibDockerBuild

README.md

@@ -0,0 +1,30 @@
+### Quick start
+
+Build the application with:
+
+```shell
+make build 
+```
+
+Run with:
+
+```shell
+make run
+```
+
+
+### Running on Docker
+
+To build a docker image to your local docker daemon:
+
+```shell
+make docker-image
+```
+
+To run the previously built docker image, e.g.:
+````shell
+docker run -p 8080:8080 -e "SERVER_PORT=8080" -e "SERVER_HOST=0.0.0.0" -e "WWW_ROOT=/www" bee-software/kickstart 
+````
+
+
+

buildSrc/build.gradle.kts

@@ -4,8 +4,10 @@ plugins {
 
 repositories {
     mavenCentral()
+    gradlePluginPortal()
 }
 
 dependencies {
     implementation("org.jetbrains.kotlin:kotlin-gradle-plugin:1.4.32")
+    implementation("gradle.plugin.com.google.cloud.tools:jib-gradle-plugin:3.0.0")
 }

buildSrc/src/main/kotlin/kickstart.gradle.kts

@@ -3,10 +3,10 @@ import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 plugins {
     java
     kotlin("jvm")
+    id("com.google.cloud.tools.jib")
 }
 
-group = "software.bee.kickstart"
-version = if (project.hasProperty("version")) project.property("version") as String else "dev"
+val buildNumber by extra("0")
 
 repositories {
     mavenCentral()

gradle.properties

@@ -1 +1,2 @@
-kotlin.code.style=official
+kotlin.code.style=official
+version=dirty

server/build.gradle.kts

@@ -1,5 +1,10 @@
 plugins {
     id("kickstart")
+    application
+}
+
+application {
+    mainClass.set("kickstart.CLI")
 }
 
 dependencies {
@@ -14,3 +19,23 @@ dependencies {
     testRuntime(libs.simple)
     testkitImplementation(libs.hamkrest)
 }
+
+jib {
+    from {
+        image = "openjdk:16-alpine"
+    }
+    to {
+        image = "bee-software/kickstart"
+        tags = setOf("$version", "$version.${extra["buildNumber"]}")
+    }
+
+    extraDirectories {
+        paths {
+            path {
+                // copies the contents of www.root into '/www' on the container
+                setFrom("../webapp/src/www")
+                into = "/www"
+            }
+        }
+    }
+}

server/src/main/resources/etc/dev.properties

@@ -1,4 +1,4 @@
 server.host: localhost
 server.port: 8888
 
-www.root: webapp/src/www/
+www.root: ../webapp/src/www/

version.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+set -e
+
+git-version() {
+  if [ -d .git ]; then
+    git describe --always --tags --long
+  else
+    hg log -r . -T "{latesttag}-{latesttagdistance}-m{node|short}" --pager off
+  fi
+}
+
+simple-version() {
+  if [ -d .git ]; then
+    echo "$(git rev-list --all --count).$(git rev-parse --short HEAD)"
+  else
+    hg log -r . -T "{rev}.{node|short}" --pager off
+  fi
+
+}
+
+case "${1:-}" in
+  git)
+    long-version ;;
+  simple)
+    simple-version ;;
+  *)
+    git-version ;;
+esac