From 9f29e53e63ad12ea22e5bd847a93cefc9ea06066 Mon Sep 17 00:00:00 2001
From: "Gerber, Mike" <mike.gerber@sbb.spk-berlin.de>
Date: Wed, 26 Feb 2020 13:18:27 +0100
Subject: [PATCH] =?UTF-8?q?=E2=9C=85=20Travis:=20Cache=20Docker=20builds?=
 =?UTF-8?q?=20from=20previous=20image?=
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---
 .travis.yml | 9 ++++++++-
 build       | 2 +-
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index 77076f1..c0dad57 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,10 +12,17 @@ jobs:
     - stage: Build Docker image
       script:
         - echo "$DOCKER_PASSWORD" | docker login -u "$DOCKER_USERNAME" --password-stdin
+
+        # We are using the image my_ocrd_workflow to cache, so pull and tag it
+        - docker pull $DOCKER_USERNAME/my_ocrd_workflow
+        - docker tag $DOCKER_USERNAME/my_ocrd_workflow my_ocrd_workflow
+
         - FORCE_DOWNLOAD=y ./build
-        - docker images
+
         - docker tag my_ocrd_workflow $DOCKER_USERNAME/my_ocrd_workflow
+        - docker images
         - docker push $DOCKER_USERNAME/my_ocrd_workflow
+
     - stage: Test
       script:
         - docker pull $DOCKER_USERNAME/my_ocrd_workflow
diff --git a/build b/build
index 5bb124f..08f7c9d 100755
--- a/build
+++ b/build
@@ -19,4 +19,4 @@ get_from_web() {
 handle_data
 
 
-docker build -t my_ocrd_workflow .
+docker build --cache-from my_ocrd_workflow -t my_ocrd_workflow .