From 2a2fcdb13381f4b8266a3430c67507f01294dd66 Mon Sep 17 00:00:00 2001
From: Jakob Odersky <jakob@odersky.com>
Date: Mon, 23 Jul 2018 17:51:55 -0700
Subject: Include git commit hash in docker image tags (#5)

* Include git commit hash in docker image tags

* Add timestamp and make git commit optional
---
 src/main/scala/xyz.driver.sbt/Service.scala | 18 ++++++++----------
 1 file changed, 8 insertions(+), 10 deletions(-)

diff --git a/src/main/scala/xyz.driver.sbt/Service.scala b/src/main/scala/xyz.driver.sbt/Service.scala
index a0186e6..3854876 100644
--- a/src/main/scala/xyz.driver.sbt/Service.scala
+++ b/src/main/scala/xyz.driver.sbt/Service.scala
@@ -1,17 +1,11 @@
 package xyz.driver.sbt
 
 import com.typesafe.sbt.GitPlugin.autoImport._
-import com.typesafe.sbt.packager.Keys.{
-  dockerBaseImage => _,
-  dockerCommands => _,
-  dockerExposedPorts => _,
-  dockerRepository => _,
-  dockerUpdateLatest => _,
-  _
-}
+import com.typesafe.sbt.packager.Keys._
 import com.typesafe.sbt.packager.archetypes.JavaAppPackaging
-import com.typesafe.sbt.packager.docker.DockerPlugin.autoImport._
+import com.typesafe.sbt.packager.docker.DockerPlugin.autoImport.Docker
 import com.typesafe.sbt.packager.docker.{Cmd, DockerPlugin}
+import java.time.Instant
 import sbt.Keys._
 import sbt.{Def, _}
 import sbtbuildinfo.BuildInfoPlugin
@@ -41,6 +35,9 @@ object Service extends AutoPlugin {
     dockerRepository := Some("gcr.io/driverinc-sandbox"),
     dockerUpdateLatest := true, // automatically update the latest tag
     dockerBaseImage := "openjdk:10",
+    dockerLabels := Map(
+      "build.timestamp"                           -> Instant.now().toString
+    ) ++ git.gitHeadCommit.value.map("git.commit" -> _),
     dockerCommands := dockerCommands.value.flatMap { // @see http://blog.codacy.com/2015/07/16/dockerizing-scala/
       case cmd @ Cmd("FROM", _) => cmd :: customCommands.value.map(customCommand => Cmd("RUN", customCommand))
       case other                => List(other)
@@ -64,7 +61,8 @@ object Service extends AutoPlugin {
       crossScalaVersions := List("2.12.6"),
       scalaVersion := crossScalaVersions.value.last,
       publish := {
-        streams.value.log.warn(s"Service ${name.value} won't be published.")
+        streams.value.log
+          .warn(s"Project ${name.value} is a service and will therefore not be published to an artifactory.")
       }
     )
 
-- 
cgit v1.2.3