Initial commit

README.md

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+Example for single build  
+`buildah build -f builder-x86.dockerfile -t builderx86:latest`
+
+Build all containers and push by executing `create-containers.sh`

builder-arm.dockerfile

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+FROM docker.io/menci/archlinuxarm:base-devel
+
+# install dependencies
+RUN pacman -Syu --noconfirm \
+    sudo \
+    git
+
+# allow sudo for all users
+RUN echo '%wheel ALL=(ALL) NOPASSWD: ALL' > /etc/sudoers.d/wheel
+
+# add builder user
+RUN useradd builder -s /bin/bash -G wheel
+
+# copy builder script
+COPY --chmod=755 builder.sh /
+
+# execute builder script
+ENTRYPOINT [ "/builder.sh" ]

builder-x86.dockerfile

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+FROM docker.io/archlinux:base-devel
+
+# install dependencies
+RUN pacman -Syu --noconfirm \
+    sudo \
+    git
+
+# allow sudo for all users
+RUN echo '%wheel ALL=(ALL) NOPASSWD: ALL' > /etc/sudoers.d/wheel
+
+# add builder user
+RUN useradd builder -s /bin/bash -G wheel
+
+# copy builder script
+COPY --chmod=755 builder.sh /
+
+# execute builder script
+ENTRYPOINT [ "/builder.sh" ]

builder.sh

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+#!/usr/bin/env sh
+set -euo pipefail
+
+# check if one argument is present
+if [ "$#" -ne 1 ]; then
+    echo "Pass the AUR package name you want to build"
+    exit 1
+fi
+
+# relaunch script as builder user
+if [ "$(whoami)" != "builder" ]; then
+    sudo -u builder bash "$0" "$@"
+    exit
+fi
+
+echo "MAKEFLAGS=\"-j$(nproc)\"" | sudo tee -a /etc/makepkg.conf
+
+export TMPDIR=$(mktemp -d)
+
+cd "$TMPDIR"
+
+git clone https://aur.archlinux.org/"$1".git
+
+cd "$TMPDIR/$1"
+
+makepkg -As --noconfirm
+
+sudo mkdir -p /out
+
+sudo cp ./*".pkg.tar.zst" /out

create-containers.sh

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+#!/usr/bin/env sh
+
+# read variables from file
+eval "$(cat variables)"
+
+# Create a multi-architecture manifest
+buildah manifest create ${MANIFEST_NAME}
+
+# Build your amd64 architecture container
+buildah bud \
+    --tag "${REGISTRY}/${USER}/${IMAGE_NAME}:${IMAGE_TAG}" \
+    --tag "${REGISTRY}/${USER}/${IMAGE_NAME}:latest" \
+    --manifest ${MANIFEST_NAME} \
+    --file ${AMD64_FILE} \
+    --arch amd64
+
+# Build your arm64 architecture container
+buildah bud \
+    --tag "${REGISTRY}/${USER}/${IMAGE_NAME}:${IMAGE_TAG}" \
+    --tag "${REGISTRY}/${USER}/${IMAGE_NAME}:latest" \
+    --manifest ${MANIFEST_NAME} \
+    --file ${ARM64_FILE} \
+    --arch arm64
+
+# Push the full manifest, with both CPU Architectures
+buildah manifest push --all \
+    ${MANIFEST_NAME} \
+    "docker://${REGISTRY}/${USER}/${IMAGE_NAME}:${IMAGE_TAG}"
+buildah manifest push --all \
+    ${MANIFEST_NAME} \
+    "docker://${REGISTRY}/${USER}/${IMAGE_NAME}:latest"
+
+# remove manifest
+buildah manifest rm ${MANIFEST_NAME}