Use local build script in CI

- Extracts commands into a separate script
- Updates CI to Docker 17.X
- Normalises pushed images to:
  - revision: eg. 22dd724
  - branch: maintenance
  - semver: eg v1.5.2-5-g22dd724

Change-Type: patch

.circleci/config.yml

@@ -3,7 +3,7 @@ version: 2
 jobs:
   build:
     docker:
-      - image: library/docker:1.12.6
+      - image: library/docker:17
     working_directory: /tmp/build
     environment:
       DOCKER_USERNAME: travisciresin
@@ -14,31 +14,13 @@ jobs:
           version: 17.07.0-ce
           reusable: true
           exclusive: false
-      - run: |
-          docker info
-          docker login -u="$DOCKER_USERNAME" -p="$DOCKER_PASSWORD"
-      - run:
-          name: Build
+      - run: 
+          name: Setup
           command: |
-            set -ex
-            docker pull ${DOCKER_IMAGE}:${CIRCLE_BRANCH} || true
-            docker build --rm=false --pull --tag ${DOCKER_IMAGE}:${CIRCLE_SHA1} .
-      - deploy:
+            docker info
+            docker login -u="$DOCKER_USERNAME" -p="$DOCKER_PASSWORD"
+            apk add --no-cache git
+      - run:
+          name: Build and push
           command: |
-              docker login -u="$DOCKER_USERNAME" -p="$DOCKER_PASSWORD"
-              set -ex
-              docker push ${DOCKER_IMAGE}:${CIRCLE_SHA1}
-              docker tag ${DOCKER_IMAGE}:${CIRCLE_SHA1} ${DOCKER_IMAGE}:${CIRCLE_BRANCH}
-              docker push ${DOCKER_IMAGE}:${CIRCLE_BRANCH}
-              if [ "${CIRCLE_TAG}" != "" ]; then
-                docker tag ${DOCKER_IMAGE}:${CIRCLE_SHA1} ${DOCKER_IMAGE}:${CIRCLE_TAG}
-                docker push ${DOCKER_IMAGE}:${CIRCLE_TAG}
-              fi
-
-              # Tag the branch
-              apk add --no-cache git
-              tag=$(git describe --tags) || true
-              if [ "${tag}" != "" ]; then
-                docker tag ${DOCKER_IMAGE}:${CIRCLE_SHA1} ${DOCKER_IMAGE}:${tag}
-                docker push ${DOCKER_IMAGE}:${tag}
-              fi
+            IMAGE_NAME=$DOCKER_IMAGE BRANCH_NAME=$CIRCLE_BRANCH ./automation/build.sh

automation/build.sh

@@ -0,0 +1,23 @@
+#!/bin/sh
+set -e
+
+# Input is:
+# - IMAGE_NAME: the repo to push the image to, eg. resin/repository-name
+# - BRANCH_NAME: eg. fix-some-bug
+
+VERSION=$(git describe --tags)
+REVISION=$(git rev-parse --short HEAD)
+BRANCH=$(echo $BRANCH_NAME | sed 's/[^a-z0-9A-Z_.-]/-/g')
+
+# Try pulling the old build first for caching purposes.
+docker pull ${IMAGE_NAME}:${BRANCH} || docker pull ${IMAGE_NAME}:master || true
+
+# Build and tag
+docker build --pull --tag ${IMAGE_NAME}:${REVISION} .
+docker tag ${IMAGE_NAME}:${REVISION} ${IMAGE_NAME}:${BRANCH}
+docker tag ${IMAGE_NAME}:${REVISION} ${IMAGE_NAME}:${VERSION}
+
+# Push the images
+docker push ${IMAGE_NAME}:${REVISION}
+docker push ${IMAGE_NAME}:${BRANCH}
+docker push ${IMAGE_NAME}:${VERSION}