pcr: Add preliminary docker-registry 2.8.1 package

This package is based on the Guix docker-registry package that
was made from scratch by me (and that is pending review).

A basic configuration without authentication[1] was tested and works
fine.

[1] I took config-example.yml and removed the authentication part,
    and run it on localhost, and I managed to push a docker image
    to it.

Note that at the moment it still lacks a systemd unit file and
I also still need to investigate how to deploy it in production
(so with authentication, a public domain, with TLS, etc) and to
document that along the way on the Libreplanet Wiki[1].

[1]https://libreplanet.org/wiki/Group:Software/research/ExternalRepositories/DockerRegistries

When that is done we could use it for different use cases, for
instance:
- For setting up an official Parabola docker registry for hosting
  Parabola official images.
- For hosting an FSDG compliant docker registry for multiple
  FSDG compliant distributions.
- For hosting FSDG compliant docker registries for other uses (like
  personal uses, specific use cases, etc)

At the moment it's possible to build docker images for the following
FSDG compliant distributions[1]:
- Guix
- Parabola
- PureOS
- Trisquel (9 and 10)

[1]https://libreplanet.org/wiki/Group:Software/research/DistroExecutionEnvironments

Signed-off-by: Denis 'GNUtoo' Carikli <GNUtoo@cyberdimension.org>

1 files changed, 59 insertions, 0 deletions

diff --git a/pcr/docker-registry/PKGBUILD b/pcr/docker-registry/PKGBUILD
new file mode 100644
index 000000000..00f045179
--- /dev/null
+++ b/pcr/docker-registry/PKGBUILD
@@ -0,0 +1,59 @@
+# Copyright (C) 2023 Denis 'GNUtoo' Carikli <GNUtoo@cyberdimension.org>
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the CC0 1.0 License.
+# Maintainer: Parabola Hackers <dev@lists.parabola.nu>
+
+pkgname=docker-registry
+pkgver=2.8.1
+pkgrel=1
+pkgdesc="Docker registry server and associated tools"
+arch=('armv7' 'i686' 'x86_64')
+url='https://github.com/docker/distribution.git'
+license=('Apache')
+makedepends=('go')
+source=("https://github.com/distribution/distribution/archive/refs/tags/v${pkgver}.tar.gz")
+sha512sums=('b9c8525051458ff4bf4592ca3ddba83c4325e88c6812ddb28c1567e331c1571f112e3b646ca970f0fe420f3b1d61d00f7151450d7b9948a08733606255731266')
+
+prepare(){
+  mkdir -p src/github.com/docker
+
+  mv "distribution-${pkgver}" src/github.com/docker/distribution
+
+  cd src/github.com/docker/distribution
+
+  sed "s/^VERSION=\$(.*)/VERSION=${pkgver}/" -i Makefile
+  sed "s/^REVISION=\$(.*)/REVISION=${pkgrel}/" -i Makefile
+}
+
+build(){
+  export GOPATH="$GOPATH:${PWD}"
+  cd src/github.com/docker/distribution
+
+  make binaries
+}
+
+package(){
+  cd src/github.com/docker/distribution
+
+  install -d "${pkgdir}/usr/bin/"
+  binaries="digest registry registry-api-descriptor-template"
+  for binary in ${binaries} ; do
+      install -m 755 "bin/${binary}" -t "${pkgdir}/usr/bin/"
+  done
+
+  install -d "${pkgdir}/usr/share/doc/${pkgname}/"
+  files="BUILDING.md CONTRIBUTING.md LICENSE MAINTAINERS README.md ROADMAP.md"
+  for file in ${files} ; do
+      install -m 644 "${file}" -t "${pkgdir}/usr/share/doc/${pkgname}/"
+  done
+
+  cp -r docs "${pkgdir}/usr/share/doc/${pkgname}/"
+
+  install -d "${pkgdir}/usr/share/doc/${pkgname}/registry-example-configs"
+  files="config-cache.yml config-example.yml config-dev.yml"
+  for file in ${files} ; do
+      install -m 644 \
+	      "cmd/registry/${file}" \
+	      -t "${pkgdir}/usr/share/doc/${pkgname}/registry-example-configs"
+  done
+}