124 lines
3.7 KiB
Nix
124 lines
3.7 KiB
Nix
# Copyright 2022 The TVL Contributors
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# SPDX-License-Identifier: Apache-2.0
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# This function header aims to provide compatibility between builds of
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# Nixery taking place inside/outside of the TVL depot.
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#
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# In the future, Nixery will transition to using //nix/buildGo for its
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# build system and this will need some major adaptations to support
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# that.
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{ depot ? { nix.readTree.drvTargets = x: x; }
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, pkgs ? import <nixpkgs> { }
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, preLaunch ? ""
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, extraPackages ? [ ]
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, maxLayers ? 20
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, commitHash ? null
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, ...
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}@args:
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with pkgs;
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let
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inherit (pkgs) buildGoModule;
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# Avoid extracting this from git until we have a way to plumb
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# through revision numbers.
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nixery-commit-hash = "depot";
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# Go implementation of the Nixery server which implements the
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# container registry interface.
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#
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# Users should use the nixery-bin derivation below instead as it
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# provides the paths of files needed at runtime.
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nixery-server = buildGoModule rec {
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name = "nixery-server";
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src = ./.;
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doCheck = true;
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# Needs to be updated after every modification of go.mod/go.sum
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vendorSha256 = "1xnmyz2a5s5sck0fzhcz51nds4s80p0jw82dhkf4v2c4yzga83yk";
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buildFlagsArray = [
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"-ldflags=-s -w -X main.version=${nixery-commit-hash}"
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];
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};
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in
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depot.nix.readTree.drvTargets rec {
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# Implementation of the Nix image building logic
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nixery-prepare-image = import ./prepare-image { inherit pkgs; };
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# Use mdBook to build a static asset page which Nixery can then
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# serve. This is primarily used for the public instance at
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# nixery.dev.
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nixery-book = callPackage ./docs { };
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# Wrapper script running the Nixery server with the above two data
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# dependencies configured.
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#
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# In most cases, this will be the derivation a user wants if they
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# are installing Nixery directly.
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nixery-bin = writeShellScriptBin "nixery" ''
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export WEB_DIR="${nixery-book}"
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export PATH="${nixery-prepare-image}/bin:$PATH"
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exec ${nixery-server}/bin/nixery
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'';
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nixery-popcount = callPackage ./popcount { };
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# Container image containing Nixery and Nix itself. This image can
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# be run on Kubernetes, published on AppEngine or whatever else is
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# desired.
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nixery-image =
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let
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# Wrapper script for the wrapper script (meta!) which configures
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# the container environment appropriately.
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#
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# Most importantly, sandboxing is disabled to avoid privilege
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# issues in containers.
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nixery-launch-script = writeShellScriptBin "nixery" ''
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set -e
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export PATH=${coreutils}/bin:$PATH
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export NIX_SSL_CERT_FILE=/etc/ssl/certs/ca-bundle.crt
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mkdir -p /tmp
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# Create the build user/group required by Nix
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echo 'nixbld:x:30000:nixbld' >> /etc/group
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echo 'nixbld:x:30000:30000:nixbld:/tmp:/bin/bash' >> /etc/passwd
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echo 'root:x:0:0:root:/root:/bin/bash' >> /etc/passwd
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echo 'root:x:0:' >> /etc/group
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# Disable sandboxing to avoid running into privilege issues
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mkdir -p /etc/nix
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echo 'sandbox = false' >> /etc/nix/nix.conf
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# In some cases users building their own image might want to
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# customise something on the inside (e.g. set up an environment
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# for keys or whatever).
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#
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# This can be achieved by setting a 'preLaunch' script.
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${preLaunch}
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exec ${nixery-bin}/bin/nixery
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'';
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in
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dockerTools.buildLayeredImage {
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name = "nixery";
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config.Cmd = [ "${nixery-launch-script}/bin/nixery" ];
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inherit maxLayers;
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contents = [
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bashInteractive
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cacert
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coreutils
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git
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gnutar
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gzip
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iana-etc
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nix
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nixery-prepare-image
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nixery-launch-script
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openssh
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zlib
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] ++ extraPackages;
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};
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}
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