102 lines
2.6 KiB
Go
102 lines
2.6 KiB
Go
// SPDX-FileCopyrightText: 2023 Luke Granger-Brown <depot@lukegb.com>
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//
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// SPDX-License-Identifier: Apache-2.0
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package nixbuild
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import (
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"context"
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"io"
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"strings"
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"hg.lukegb.com/lukegb/depot/go/nix/nar/narinfo"
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"hg.lukegb.com/lukegb/depot/go/nix/nixdrv"
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"hg.lukegb.com/lukegb/depot/go/nix/nixpool"
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)
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type Fetcher interface {
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FetchNarInfo(ctx context.Context, path string) (*narinfo.NarInfo, error)
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FetchNar(ctx context.Context, ni *narinfo.NarInfo) (io.ReadCloser, error)
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}
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type DerivationFetcher interface {
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nixdrv.Resolver
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FetchDerivationForPath(ctx context.Context, path string) (*nixdrv.BasicDerivation, string, error)
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}
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type Resolver interface {
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Fetcher
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RelativePriority() int
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}
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type Target interface {
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ValidPaths(ctx context.Context, paths []string) ([]string, error)
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EnsurePaths(ctx context.Context, paths []string) ([]string, error)
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PutNar(ctx context.Context, ni *narinfo.NarInfo, w io.Reader) error
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Fetcher
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}
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type Builder struct {
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Pool *nixpool.Pool
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SupportedPlatforms map[string]bool
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SupportedFeatures map[string]bool
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RequiredFeatures []map[string]bool
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}
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func (b *Builder) SupportsAll(features map[string]bool) bool {
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for f := range features {
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if b.SupportedFeatures == nil || !b.SupportedFeatures[f] {
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return false
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}
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}
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return true
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}
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func (b *Builder) CanBuild(features map[string]bool) bool {
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if len(b.RequiredFeatures) == 0 {
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return true
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}
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if features == nil {
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return false
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}
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requiredFeaturesLoop:
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for _, rf := range b.RequiredFeatures {
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for f := range rf {
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if !features[f] {
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continue requiredFeaturesLoop
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}
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}
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return true
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}
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return false
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}
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type Config struct {
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// Target is the endpoint which should end up having all the built packages.
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// If Target is nil, we will build things if necessary and leave them on the builders. Things may end up in a weird state if Target is nil and the Builders are not present in Resolvers, since built dependencies may not be available.
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Target Target
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// Allow target to resolve packages on its own, from its locally configured caches?
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ResolveOnTarget bool
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// Things to resolve packages from.
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// You should probably put Target and Builders in this list.
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Resolvers []Resolver
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// Peers to build packages on.
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// If empty, building will be disabled.
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Builders []*Builder
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// Allow builders to resolve dependencies on their own, from their locally configured caches?
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ResolveDependenciesOnBuilders bool
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// Store path. Usually /nix/store, which is the default if empty.
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StorePath string
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}
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func (c Config) storePath() string {
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if c.StorePath == "" {
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return "/nix/store"
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}
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return strings.TrimSuffix(c.StorePath, "/")
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}
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