Switch to GitHub Actions to resume builds

Travis stopped building images on their .org instance on 15 Jun 2021,
leaving the last push to Docker Hub on 19 May 2021. That's a few months
out of date, now, which causes pulls to have lots of updates to run on
startup. In the interest of getting builds going again, and moving away
from Travis, here is a switch to GitHub Actions instead. I also replaced
the QEMU setup script with a Docker image designed to do the same thing,
mostly so the builds would complete.

.github/workflows/build-deploy.yml

@@ -0,0 +1,66 @@
+name: Build and Deploy
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+  schedule:
+    - cron: '0 0 * * 0' # Run weekly on Sunday at midnight
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        arch: 
+          - arm32v7
+          - arm64v8
+    steps:
+      - uses: actions/checkout@v2
+      - name: Enable Docker experimental mode for image squashing
+        if: github.actor != 'nektos/act'
+        run: |
+          echo '{ "experimental": true }' | sudo tee /etc/docker/daemon.json
+          sudo systemctl restart docker
+      - name: Setup dependencies
+        run: |
+          sudo apt-get update && \
+            sudo apt-get --yes --no-install-recommends install qemu-user-static
+          docker run --rm --privileged multiarch/qemu-user-static --reset -p yes
+          chmod -R g-w ./
+      - name: Build images
+        run: ./build
+        env:
+          BUILD_ARCH: ${{ matrix.arch }}
+          DOCKER_ORG: ${{ secrets.DOCKER_USERNAME }}
+      - name: Deploy images
+        if: github.event_name != 'pull_request'
+        run: docker login -u="$DOCKER_USERNAME" -p="$DOCKER_PASSWORD" && ./push
+        env:
+          BUILD_ARCH: ${{ matrix.arch }}
+          DOCKER_ORG: ${{ secrets.DOCKER_USERNAME }}
+          DOCKER_USERNAME: ${{ secrets.DOCKER_USERNAME }}
+          DOCKER_PASSWORD: ${{ secrets.DOCKER_PASSWORD }}
+
+  manifests:
+    runs-on: ubuntu-latest
+    if: github.event_name != 'pull_request'
+    needs:
+      - build
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup dependencies
+        run: docker login -u="$DOCKER_USERNAME" -p="$DOCKER_PASSWORD"
+        env:
+          DOCKER_ORG: ${{ secrets.DOCKER_USERNAME }}
+          DOCKER_USERNAME: ${{ secrets.DOCKER_USERNAME }}
+          DOCKER_PASSWORD: ${{ secrets.DOCKER_PASSWORD }}
+      - name: Create Manifest
+        run: ./create-manifest
+        env:
+          DOCKER_ORG: ${{ secrets.DOCKER_USERNAME }}

README.md

@@ -1,4 +1,4 @@
-# Basic Arch Linux ARM Docker images [![Build Status](https://travis-ci.org/agners/archlinuxarm-docker.svg?branch=master)](https://travis-ci.org/agners/archlinuxarm-docker)
+# Basic Arch Linux ARM Docker images [![Build and Deploy](https://github.com/agners/archlinuxarm-docker/actions/workflows/build-deploy.yml/badge.svg)](https://github.com/agners/archlinuxarm-docker/actions/workflows/build-deploy.yml)
 
 Docker images for Arch Linux ARM on AArch32 (ARMv7-A) and AArch64 (ARMv8-A). Built using native pacman and Docker multi-stage builds. Builds weekly by Travis CI on publicly visible infrastructure using Qemu emulation.
 
@@ -16,7 +16,7 @@ Instead of using the multi-arch container above, you can also get the architectu
 
 |  Tag   |   Update   |  Type   |                                 Description                                        |
 |:------:|:----------:|:-------:|:-----------------------------------------------------------------------------------|
-| latest | **weekly** | minimal | minimal Arch Linux ARM with pacman support                                        |
+| latest | **weekly** | minimal | minimal Arch Linux ARM with pacman support                                         |
 
 ### Layer structure
 
@@ -43,16 +43,15 @@ docker run -e TZ=Europe/Berlin agners/archlinuxarm
 ### Prerequisites
 
 - Docker with experimental mode on (required for squash)
-- sudo or root is neccessary to setup binfmt for Qemu user mode emulation
 
 ### Building
 
-- Prepare binfmt use with Qemu user mode using `sudo ./prepare-qemu`
-- Run `BUILD_ARCH=<arch> ./build` to build
+- Prepare binfmt use with Qemu user mode using `docker run --rm --privileged multiarch/qemu-user-static --reset -p yes`
+- Run `BUILD_ARCH=<arch> DOCKER_ORG=<your_docker_org> ./build` to build
   - Use `BUILD_ARCH=arm32v7` for ARMv7 Aarch32
   - Use `BUILD_ARCH=arm64v8` for ARMv8 Aarch64
 
-If you want to push the images, run `./push`. *But be aware you have no push access to the repos! Edit the scripts to push to custom Docker Hub locations!*
+If you want to push the images, run `DOCKER_ORG=<your_docker_org> ./push`.
 
 ### Building from scratch
 

build

@@ -1,7 +1,7 @@
 #!/bin/bash -ex
 
 DOCKER_ARCH=${BUILD_ARCH:-arm32v7}
-DOCKER_ORG=agners
+DOCKER_ORG=${DOCKER_ORG:-agners}
 DOCKER_IMAGE=archlinuxarm-${DOCKER_ARCH}
 
 TAG_DATE=$(date +'%Y%m%d')

create-manifest

@@ -1,15 +1,15 @@
 #!/bin/bash -ex
 
-DOCKER_ORG=agners
+DOCKER_ORG=${DOCKER_ORG:-agners}
 DOCKER_IMAGE=archlinuxarm
 
 TAGS="latest $(date +'%Y%m%d')"
 
 for TAG in $TAGS
 do
 	docker manifest create --amend $DOCKER_ORG/$DOCKER_IMAGE:$TAG \
-				$DOCKER_ORG/$DOCKER_IMAGE-arm32v7:$TAG \
-				$DOCKER_ORG/$DOCKER_IMAGE-arm64v8:$TAG
+			$DOCKER_ORG/$DOCKER_IMAGE-arm32v7:$TAG \
+			$DOCKER_ORG/$DOCKER_IMAGE-arm64v8:$TAG
 
 	docker manifest annotate $DOCKER_ORG/$DOCKER_IMAGE:$TAG \
 			$DOCKER_ORG/$DOCKER_IMAGE-arm32v7:$TAG \

push

@@ -1,7 +1,7 @@
 #!/bin/bash -ex
 
 DOCKER_ARCH=${BUILD_ARCH:-arm32v7}
-DOCKER_ORG=agners
+DOCKER_ORG=${DOCKER_ORG:-agners}
 DOCKER_IMAGE=archlinuxarm-${DOCKER_ARCH}
 
 TAG_DATE=$(date +'%Y%m%d')