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# Copyright 2019 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
{ pkgs ? import <nixpkgs> { }
, preLaunch ? ""
, extraPackages ? []
, maxLayers ? 20 }:
with pkgs;
let
inherit (pkgs) buildGoPackage;
# Hash of all Nixery sources - this is used as the Nixery version in
# builds to distinguish errors between deployed versions, see
# server/logs.go for details.
nixery-src-hash = pkgs.runCommand "nixery-src-hash" {} ''
echo ${./.} | grep -Eo '[a-z0-9]{32}' | head -c 32 > $out
'';
# Go implementation of the Nixery server which implements the
# container registry interface.
#
# Users should use the nixery-bin derivation below instead as it
# provides the paths of files needed at runtime.
nixery-server = buildGoPackage rec {
name = "nixery-server";
goDeps = ./go-deps.nix;
src = ./.;
goPackagePath = "github.com/google/nixery";
doCheck = true;
# Simplify the Nix build instructions for Go to just the basics
# required to get Nixery up and running with the additional linker
# flags required.
outputs = [ "out" ];
preConfigure = "bin=$out";
buildPhase = ''
runHook preBuild
runHook renameImport
export GOBIN="$out/bin"
go install -ldflags "-X main.version=$(cat ${nixery-src-hash})" ${goPackagePath}
'';
fixupPhase = ''
remove-references-to -t ${go} $out/bin/nixery
'';
checkPhase = ''
go vet ${goPackagePath}
go test ${goPackagePath}
'';
};
in rec {
# Implementation of the Nix image building logic
nixery-prepare-image = import ./prepare-image { inherit pkgs; };
# Use mdBook to build a static asset page which Nixery can then
# serve. This is primarily used for the public instance at
# nixery.dev.
nixery-book = callPackage ./docs { };
# Wrapper script running the Nixery server with the above two data
# dependencies configured.
#
# In most cases, this will be the derivation a user wants if they
# are installing Nixery directly.
nixery-bin = writeShellScriptBin "nixery" ''
export WEB_DIR="${nixery-book}"
export PATH="${nixery-prepare-image}/bin:$PATH"
exec ${nixery-server}/bin/nixery
'';
nixery-popcount = callPackage ./popcount { };
# Container image containing Nixery and Nix itself. This image can
# be run on Kubernetes, published on AppEngine or whatever else is
# desired.
nixery-image = let
# Wrapper script for the wrapper script (meta!) which configures
# the container environment appropriately.
#
# Most importantly, sandboxing is disabled to avoid privilege
# issues in containers.
nixery-launch-script = writeShellScriptBin "nixery" ''
set -e
export PATH=${coreutils}/bin:$PATH
export NIX_SSL_CERT_FILE=/etc/ssl/certs/ca-bundle.crt
mkdir -p /tmp
# Create the build user/group required by Nix
echo 'nixbld:x:30000:nixbld' >> /etc/group
echo 'nixbld:x:30000:30000:nixbld:/tmp:/bin/bash' >> /etc/passwd
echo 'root:x:0:0:root:/root:/bin/bash' >> /etc/passwd
echo 'root:x:0:' >> /etc/group
# Disable sandboxing to avoid running into privilege issues
mkdir -p /etc/nix
echo 'sandbox = false' >> /etc/nix/nix.conf
# In some cases users building their own image might want to
# customise something on the inside (e.g. set up an environment
# for keys or whatever).
#
# This can be achieved by setting a 'preLaunch' script.
${preLaunch}
exec ${nixery-bin}/bin/nixery
'';
in dockerTools.buildLayeredImage {
name = "nixery";
config.Cmd = [ "${nixery-launch-script}/bin/nixery" ];
inherit maxLayers;
contents = [
bashInteractive
cacert
coreutils
git
gnutar
gzip
iana-etc
nix
nixery-prepare-image
nixery-launch-script
openssh
zlib
] ++ extraPackages;
};
}
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