Initial version

Signed-off-by: Knut Ahlers <knut@ahlers.me>

Dockerfile

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+FROM archlinux/base:latest
+
+RUN set -ex \
+ && pacman -Sy \
+ && pacman -S --noconfirm --needed \
+      base-devel \
+      curl \
+      git \
+ && useradd -m -u 1000 builder \
+ && echo "builder ALL=(ALL) NOPASSWD: ALL" >/etc/sudoers.d/builder \
+ && curl -sSfLo /usr/local/bin/dumb-init  "https://github.com/Yelp/dumb-init/releases/download/v1.2.1/dumb-init_1.2.1_amd64" \
+ && curl -sSfLo /usr/local/bin/gosu       "https://github.com/tianon/gosu/releases/download/1.11/gosu-amd64" \
+ && chmod 0755 \
+      /usr/local/bin/dumb-init \
+      /usr/local/bin/gosu
+
+VOLUME ["/src", "/repo"]
+WORKDIR /src
+
+COPY run.sh /usr/local/bin/
+
+ENTRYPOINT ["/usr/local/bin/run.sh"]

README.md

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+# luzifer-docker / arch-repo-builder
+
+This repo contains a docker image to build and automatically add Archlinux packages to a local repository (which then can be served through an HTTP server).
+
+## Usage
+
+### Local `PKGBUILD`
+First possibility to use this image is to build a local `PKGBUILD` file:
+
+```bash
+docker run --rm -ti \
+	-v "$(pwd):/src" \
+	-v "/path/to/repo:/repo" \
+	luzifer/arch-repo-builder
+```
+
+This will build an image from this Gist, take the local `PKGBUILD` in `/src`, build the package, move the result into `/repo` and add it to the `*.db.tar.*` file found in the repo. (Which means you need to initialize the repo first: `repo-add /path/to/repo/reponame.db.tar.xz`)
+
+### Remote git repository
+The second possibility is to build any git repo containing a `PKGBUILD` file:
+
+```bash
+docker run --rm -ti \
+	-v "/path/to/repo:/repo" \
+	luzifer/arch-repo-builder \
+	https://aur.archlinux.org/nerd-fonts-dejavu-complete.git
+```
+
+This will clone the given repository and then execute the same process as above.
+
+### Build without repo
+If no db-file was found in `/repo` the package will not be added to the repo but only reside in the mounted `/src`.

run.sh

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+#!/usr/local/bin/dumb-init /bin/bash
+set -euxo pipefail
+
+SRC=${1:-}
+
+# Override WORKDIR
+cd /src
+
+if [ ! -e PKGBUILD ]; then
+	if [ -z "${SRC}" ]; then
+		echo "No /src/PKGBUILD was found and no repo to clone was given as parameter"
+		exit 1
+	fi
+
+	# Ensure permissions on src
+	chown -R builder /src
+
+	gosu builder git clone "${SRC}" /src/git
+	cd /src/git
+fi
+
+# Execute the build itself
+gosu builder makepkg -cCs --noconfirm --needed
+
+PACKAGE=$(ls *.pkg.*) # This should be only one file
+
+REPODB=$(find /repo -name '*.db.*' ! -name '*.old')
+if [ -z "${REPODB}" ]; then
+	echo "No database found in /repo, not adding package."
+	echo "The built package is available in ${PACKAGE}"
+fi
+
+gosu builder mv "${PACKAGE}" /repo
+
+cd /repo
+gosu builder repo-add ${REPODB} "${PACKAGE}"