diff options
| -rw-r--r-- | tools/nixery/build-image/build-image.nix | 64 | ||||
| -rw-r--r-- | tools/nixery/build-image/default.nix | 11 | ||||
| -rw-r--r-- | tools/nixery/build-image/load-pkgs.nix | 73 | ||||
| -rw-r--r-- | tools/nixery/default.nix | 4 |
4 files changed, 87 insertions, 65 deletions
diff --git a/tools/nixery/build-image/build-image.nix b/tools/nixery/build-image/build-image.nix index d68ed6d378..b67fef6ceb 100644 --- a/tools/nixery/build-image/build-image.nix +++ b/tools/nixery/build-image/build-image.nix @@ -18,9 +18,11 @@ # registry API. { + # Package set to used (this will usually be loaded by load-pkgs.nix) + pkgs, # Image Name name, - # Image tag, the Nix's output hash will be used if null + # Image tag, the Nix output's hash will be used if null tag ? null, # Tool used to determine layer grouping groupLayers, @@ -36,71 +38,13 @@ # the default here is set to something a little less than that. maxLayers ? 96, - # Configuration for which package set to use when building. - # - # Both channels of the public nixpkgs repository as well as imports - # from private repositories are supported. - # - # This setting can be invoked with three different formats: - # - # 1. nixpkgs!$channel (e.g. nixpkgs!nixos-19.03) - # 2. git!$repo!$rev (e.g. git!git@github.com:NixOS/nixpkgs.git!master) - # 3. path!$path (e.g. path!/var/local/nixpkgs) - # - # '!' was chosen as the separator because `builtins.split` does not - # support regex escapes and there are few other candidates. It - # doesn't matter much because this is invoked by the server. - pkgSource ? "nixpkgs!nixos-19.03", ... }: -with builtins; let - # If a nixpkgs channel is requested, it is retrieved from Github (as - # a tarball) and imported. - fetchImportChannel = channel: - let url = "https://github.com/NixOS/nixpkgs-channels/archive/${channel}.tar.gz"; - in import (fetchTarball url) {}; - - # If a git repository is requested, it is retrieved via - # builtins.fetchGit which defaults to the git configuration of the - # outside environment. This means that user-configured SSH - # credentials etc. are going to work as expected. - fetchImportGit = url: rev: - let - # builtins.fetchGit needs to know whether 'rev' is a reference - # (e.g. a branch/tag) or a revision (i.e. a commit hash) - # - # Since this data is being extrapolated from the supplied image - # tag, we have to guess if we want to avoid specifying a format. - # - # There are some additional caveats around whether the default - # branch contains the specified revision, which need to be - # explained to users. - spec = if (stringLength rev) == 40 then { - inherit url rev; - } else { - inherit url; - ref = rev; - }; - in import (fetchGit spec) {}; - - importPath = path: import (toPath path) {}; - - source = split "!" pkgSource; - sourceType = elemAt source 0; - pkgs = - if sourceType == "nixpkgs" - then fetchImportChannel (elemAt source 2) - else if sourceType == "git" - then fetchImportGit (elemAt source 2) (elemAt source 4) - else if sourceType == "path" - then importPath (elemAt source 2) - else throw("Invalid package set source specification: ${pkgSource}"); -in - # Since this is essentially a re-wrapping of some of the functionality that is # implemented in the dockerTools, we need all of its components in our top-level # namespace. +with builtins; with pkgs; with dockerTools; diff --git a/tools/nixery/build-image/default.nix b/tools/nixery/build-image/default.nix index cff4039958..0d3002cb40 100644 --- a/tools/nixery/build-image/default.nix +++ b/tools/nixery/build-image/default.nix @@ -16,14 +16,17 @@ # moves the files needed to call the Nix builds at runtime in the # correct locations. -{ pkgs ? import <nixpkgs> { }, self ? ./. +{ pkgs ? null, self ? ./. # Because of the insanity occuring below, this function must mirror # all arguments of build-image.nix. -, tag ? null, name ? null, packages ? null, maxLayers ? null, pkgSource ? null +, pkgSource ? "nixpkgs!nixos-19.03" +, tag ? null, name ? null, packages ? null, maxLayers ? null }@args: -with pkgs; rec { +let pkgs = import ./load-pkgs.nix { inherit pkgSource; }; +in with pkgs; rec { + groupLayers = buildGoPackage { name = "group-layers"; goDeps = ./go-deps.nix; @@ -76,7 +79,7 @@ with pkgs; rec { }; buildImage = import ./build-image.nix - ({ inherit groupLayers; } // (lib.filterAttrs (_: v: v != null) args)); + ({ inherit pkgs groupLayers; } // (lib.filterAttrs (_: v: v != null) args)); # Wrapper script which is called by the Nixery server to trigger an # actual image build. This exists to avoid having to specify the diff --git a/tools/nixery/build-image/load-pkgs.nix b/tools/nixery/build-image/load-pkgs.nix new file mode 100644 index 0000000000..3e8b450c45 --- /dev/null +++ b/tools/nixery/build-image/load-pkgs.nix @@ -0,0 +1,73 @@ +# 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. + +# Load a Nix package set from a source specified in one of the following +# formats: +# +# 1. nixpkgs!$channel (e.g. nixpkgs!nixos-19.03) +# 2. git!$repo!$rev (e.g. git!git@github.com:NixOS/nixpkgs.git!master) +# 3. path!$path (e.g. path!/var/local/nixpkgs) +# +# '!' was chosen as the separator because `builtins.split` does not +# support regex escapes and there are few other candidates. It +# doesn't matter much because this is invoked by the server. +{ pkgSource, args ? { } }: + +with builtins; +let + # If a nixpkgs channel is requested, it is retrieved from Github (as + # a tarball) and imported. + fetchImportChannel = channel: + let + url = + "https://github.com/NixOS/nixpkgs-channels/archive/${channel}.tar.gz"; + in import (fetchTarball url) args; + + # If a git repository is requested, it is retrieved via + # builtins.fetchGit which defaults to the git configuration of the + # outside environment. This means that user-configured SSH + # credentials etc. are going to work as expected. + fetchImportGit = url: rev: + let + # builtins.fetchGit needs to know whether 'rev' is a reference + # (e.g. a branch/tag) or a revision (i.e. a commit hash) + # + # Since this data is being extrapolated from the supplied image + # tag, we have to guess if we want to avoid specifying a format. + # + # There are some additional caveats around whether the default + # branch contains the specified revision, which need to be + # explained to users. + spec = if (stringLength rev) == 40 then { + inherit url rev; + } else { + inherit url; + ref = rev; + }; + in import (fetchGit spec) args; + + # No special handling is used for paths, so users are expected to pass one + # that will work natively with Nix. + importPath = path: import (toPath path) args; + + source = split "!" pkgSource; + sourceType = elemAt source 0; +in if sourceType == "nixpkgs" then + fetchImportChannel (elemAt source 2) +else if sourceType == "git" then + fetchImportGit (elemAt source 2) (elemAt source 4) +else if sourceType == "path" then + importPath (elemAt source 2) +else + throw ("Invalid package set source specification: ${pkgSource}") diff --git a/tools/nixery/default.nix b/tools/nixery/default.nix index 686c230553..734a72d57e 100644 --- a/tools/nixery/default.nix +++ b/tools/nixery/default.nix @@ -25,7 +25,9 @@ rec { nixery-server = callPackage ./server { }; # Implementation of the image building & layering logic - nixery-build-image = (import ./build-image { inherit pkgs; }).wrapper; + nixery-build-image = (import ./build-image { + pkgSource = "path!${<nixpkgs>}"; + }).wrapper; # Use mdBook to build a static asset page which Nixery can then # serve. This is primarily used for the public instance at |