Configure Travis to lint, build and push images to Docker Hub

Author: yajo

.travis.yml

@@ -1,6 +1,4 @@
-dist: xenial
-
-sudo: required
+os: linux
 
 language: python
 
@@ -19,19 +17,42 @@ addons:
     packages:
       - docker-ce
 
+cache:
+  directories:
+    - $HOME/.cache/pip
+    - $HOME/.cache/pre-commit
+
 branches:
   only:
     - master
 
+stages:
+  - name: lint
+  - name: test
+
 env:
-  matrix:
+  global:
+    - LATEST_RELEASE=11-alpine
+    - DOCKER_REPO=tecnativa/postgres-autoconf
+  jobs:
     - DOCKER_TAG=9.6-alpine
     - DOCKER_TAG=10-alpine
     - DOCKER_TAG=11-alpine
-    - DOCKER_TAG=alpine
+
+jobs:
+  include:
+    stage: lint
+    script:
+      - pre-commit run --all --show-diff-on-failure
 
 install:
   - pip install -r tests/ci-requirements.txt
 
 script:
   - ./tests/test.py -v
+
+deploy:
+  provider: script
+  script: ./hooks/push
+  on:
+    branch: master

hooks/build

@@ -1,17 +1,23 @@
-#!/usr/bin/env bash
-set -ex
+#!/usr/bin/env python3
+from plumbum import FG, local
+from plumbum.cmd import date, docker
 
 # Check environment variables are present
-test -n "$DOCKER_TAG"
+DOCKER_TAG = local.env["DOCKER_TAG"]
+COMMIT = local.env.get("GIT_SHA1", local.env.get("TRAVIS_COMMIT"))
+DATE = date("--rfc-3339", "ns")
 
-# Prepare build args
-commit="${GIT_SHA1:-$TRAVIS_COMMIT}"
-
-# To be configured via Docker Hub UI, all labels from postgres image targeting
-# this master branch
-time docker image build \
-    --build-arg VCS_REF="$commit" \
-    --build-arg BUILD_DATE="$(date --rfc-3339 ns)" \
-    --build-arg BASE_TAG="$DOCKER_TAG" \
-    --tag "tecnativa/postgres-autoconf:$DOCKER_TAG" \
-    .
+# Build image
+docker[
+    "image",
+    "build",
+    "--build-arg",
+    "VCS_REF={}".format(COMMIT),
+    "--build-arg",
+    "BUILD_DATE={}".format(DATE),
+    "--build-arg",
+    "BASE_TAG={}".format(DOCKER_TAG),
+    "--tag",
+    "tecnativa/postgres-autoconf:{}".format(DOCKER_TAG),
+    ".",
+] & FG

hooks/push

@@ -0,0 +1,27 @@
+#!/usr/bin/env python3
+from plumbum import FG, local
+from plumbum.cmd import docker
+
+REPO = local.env["DOCKER_REPO"]
+VERSION = local.env["DOCKER_TAG"]
+
+# Log all locally available images; will help to pin images
+docker["image", "ls", "--digests", REPO] & FG
+
+# Login in Docker Hub
+docker(
+    "login",
+    "--username",
+    local.env["DOCKER_HUB_USERNAME"],
+    "--password",
+    local.env["DOCKER_HUB_TOKEN"],
+)
+
+# Push built images
+versioned_image = "%s:%s" % (REPO, VERSION)
+docker["image", "push", versioned_image] & FG
+if VERSION == local.env.get("LATEST_RELEASE"):
+    latest_version = "alpine" if VERSION.endswith("-alpine") else "latest"
+    latest_image = "%s:%s" % (REPO, latest_version)
+    docker["image", "tag", versioned_image, latest_image] & FG
+    docker["image", "push", latest_image] & FG

tests/ci-requirements.txt

@@ -1 +1,2 @@
 plumbum
+pre-commit